419 results on '"Schulz, Alexandra"'
Search Results
202. EcoRV-T94V: a mutant restriction endonuclease with an altered substrate specificity towards modified oligodexynucleotides.
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Lanio, Thomas, Selent, Ursel, Wenz, Christian, Wende, Wolfgang, Schulz, Alexandra, Adiraj, M., Katti, Seturam B., and Pingoud, Alfred
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- 1996
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203. miRNA deregulation by epigenetic silencing disrupts suppression of the oncogene PLAG1in chronic lymphocytic leukemia
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Pallasch, Christian Philipp, Patz, Michaela, Park, Yoon Jung, Hagist, Susanne, Eggle, Daniela, Claus, Rainer, Debey-Pascher, Svenja, Schulz, Alexandra, Frenzel, Lukas P., Claasen, Julia, Kutsch, Nadine, Krause, Günter, Mayr, Christine, Rosenwald, Andreas, Plass, Christoph, Schultze, Joachim L., Hallek, Michael, and Wendtner, Clemens-Martin
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MicroRNAs (miRNA) play a key role in cellular regulation and, if deregulated, in the development of neoplastic disorders including chronic lymphocytic leukemia (CLL). RNAs from primary cells of 50 treatment-naive CLL patients and peripheral B cells of 14 healthy donors were applied to miRNA expression profiling using bead chip technology. In CLL cells, a set of 7 up- and 19 down-regulated miRNAs was identified. Among the miRNAs down-regulated in CLL cells, 6 of 10 miRNA promoters examined showed gain of methylation compared with normal B-cell controls. Subsequent target prediction of deregulated miRNAs revealed a highly significant binding prediction at the 3′ untranslated region of the pleomorphic adenoma gene 1 (PLAG1) oncogene. Luciferase reporter assays including site-directed mutagenesis of binding sites revealed a significant regulation of PLAG1by miR-181a, miR-181b, miR-107, and miR-424. Although expression of PLAG1 mRNA was not affected, PLAG1 protein expression was shown to be significantly elevated in CLL cells compared with the levels in healthy donor B cells. In summary, we could demonstrate disruption of miRNA-mediated translational control, partly due to epigenetic transcriptional silencing of miRNAs, with subsequent overexpression of the oncogenic transcription factor PLAG1as a putative novel mechanism of CLL pathogenesis.
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- 2009
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204. Detection, Differentiation, and Quantitation of Pathogenic LeishmaniaOrganisms by a Fluorescence Resonance Energy Transfer-Based Real-Time PCR Assay
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Schulz, Alexandra, Mellenthin, Katja, Scho¨nian, Gabriele, Fleischer, Bernhard, and Drosten, Christian
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ABSTRACTReal-time technology eliminates many of the pitfalls of diagnostic PCR, but this method has not been applied to differentiation of Leishmaniaorganisms so far. We have developed a real-time PCR that simultaneously detects, quantitates, and categorizes Leishmaniaorganisms into three relevant groups causing distinct clinical pictures. The analytical sensitivity (detection rate of =95% at 94.1 parasites/ml of blood) was within a range that has been determined previously to facilitate the confirmation of visceral leishmaniasis from peripheral blood. Parasites were successfully detected in 12 different clinical samples (blood, bone marrow, skin, and liver). The Leishmania donovanicomplex, the Leishmania brasiliensiscomplex, and species other than these could be clearly discriminated by means of distinct melting temperatures obtained with fluorescence resonance energy transfer probes (melting points, 72.7, 67.1, and 65.0°C, respectively). All three groups could be quantified within equal ranges. As in other real-time PCRs, the variability in the quantification of DNA was small (coefficient of variation [CV], <2%). However, human samples containing low levels of parasites (100 parasites per ml of blood) showed higher variation (CV, 60.89%). Therefore, despite its superior analytical performance, care must be taken when real-time PCR is utilized for therapy monitoring.
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- 2003
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205. Scanning force microscopy of Escherichia coliRNA polymerase·σ54holoenzyme complexes with DNA in buffer and in air11Edited by W. Baumeister
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Schulz, Alexandra, Mücke, Norbert, Langowski, Jörg, and Rippe, Karsten
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Scanning force microscopy (SFM) was used to visualize complexes of Escherichia coliRNA polymerase·σ54(RNAP·σ54) and a 1036 base-pair linear DNA fragment containing the glnApromoter. In order to preserve the native hydration state of the protein-DNA complexes, the samples were injected directly into the SFM fluid cell and imaged in buffer. With this protocol, an apparent bending angle of 26(±34)° was determined for the specific complexes at the promoter. The bending angle of the unspecifically bound RNAP·σ54showed a somewhat broader distribution of 49(±48)°, indicating the existence of conformational differences as compared to the closed complex. In about two-thirds of the closed complexes, the RNA polymerase holoenzyme was located in a lateral position with respect to the DNA and the bend of the DNA was pointing away from the protein. This conformation was consistent with the finding that for the complexes at the promoter, the apparent contour length was reduced by only about 6 nm in buffer as compared to the free DNA. From these results we conclude that in the closed complex of RNAP·σ54, the DNA was not wrapped around the polymerase, and we present a model for the trajectory of the DNA with respect to the RNA polymerase. The images acquired in buffer were compared to samples that were washed with water and then dried before imaging. Two artefacts of the washing and drying process were detected. First, extensive washing of the sample reduced the number of the specific complexes bound at the promoter (closed complex of RNAP·σ54) from about 70% to 30%. This is likely to be a result of sliding of the RNAP·σ54holoenzyme along the DNA induced by the washing process. Second, the apparent DNA shortening of the contour length of RNAP·σ54-DNA complexes at the promoter as compared to the contour length of the free DNA was 22 nm for the dried samples as opposed to only 6 nm for the undried samples imaged in buffer. This suggests an artefact of the drying process.
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- 1998
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206. Association states of the transcription activator protein NtrC from E. colidetermined by analytical ultracentrifugation11Edited by K. Yamamoto
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Rippe, Karsten, Mücke, Norbert, and Schulz, Alexandra
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The transcription activator protein NtrC (nitrogen regulatory protein C) can catalyze the transition of E. coliRNA polymerase complexed with the σ54factor (RNAP·σ54) from the closed complex (RNAP·σ54bound at the promoter) to the open complex (melting of the promoter DNA). This process involves phosphorylation of NtrC, assembly of a multimeric NtrC complex at the enhancer DNA sequence, interaction of this complex with promoter bound RNAP·σ54viaDNA looping, and hydrolysis of ATP. We have used analytical ultracentrifugation to study the different NtrC association states and to derive hydrodynamic models for the conformation of the various NtrC species. The following results were obtained. (i) The unphosphorylated wild-type protein formed a dimer with a measured molecular weight of 102(±3) kDa, which compares to a calculated molecular weight of 54 kDa for a monomer (concentration range studied 2 to 8 μM NtrC monomer). (ii) In the unphosphorylated state one NtrC dimer was bound to one binding site as determined with DNA oligonucleotide duplexes containing one or two binding sites (concentration range studied 50 to 1000 nM NtrC dimer). (iii) The data obtained at protein concentrations that were below the concentration of binding sites indicate that binding to the DNA duplex with two binding sites occurred with essentially no cooperativity. The experiments were conducted in the absence of ATP. (iv) The phosphorylated protein formed a specific complex at the DNA duplex with the enhancer sequence (two NtrC binding sites) that consisted of four dimers (concentration range studied 100 to 1000 nM NtrC dimer). (v) The formation of this octameric complex was highly cooperative, and the data suggest that two DNA strands could bind simultaneously to this complex. (vi) From the sedimentation data a model was derived in which the NtrC dimer adopts a V shaped structure with the DNA binding domains being located at the bottom and the two receiver domains at the top of the V. In this conformation higher order NtrC complexes can be stabilized by interaction between the phosphorylated receiver domain and the central activation domain of different NtrC dimers.
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- 1998
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207. The IntCal20 Northern Hemisphere Radiocarbon Age Calibration Curve (0–55 cal kBP)
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Reimer, Paula J., Austin, William E.N., Bard, Edouard, Bayliss, Alex, Blackwell, Paul, Bronk Ramsey, Christopher, Butzin, Martin, Cheng, Hai, Edwards, R. Lawrence, Friedrich, Michael, Grootes, Pieter M., Guilderson, Thomas P., Hajdas, Irka, Heaton, Timothy, Hogg, Alan, Hughen, Konrad, Kromer, Bernd, Manning, Sturt, Muscheler, Raimund, Palmer, Jonathan, Pearson, Charlotte, van der Plicht, Johannes, Reimer, Ron, Richards, David A., Scott, Marian, Southon, John, Turney, Chris, Wacker, Lukas, Adolphi, Florian, Büntgen, Ulf, Capano, Manuela, Fahrni, Simon, Fogtmann-Schulz, Alexandra, Friedrich, Ronny, Köhler, Peter, Kudsk, Sabrina, Miyake, Fusa, Olsen, Jesper, Reinig, Frederick, Sakamoto, Minoru, Sookdeo, Adam, and Talamo, Sahra
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IntCal20 ,13. Climate action ,14. Life underwater ,Calibration curve ,Radiocarbon - Abstract
Radiocarbon (14C) ages cannot provide absolutely dated chronologies for archaeological or paleoenvironmental studies directly but must be converted to calendar age equivalents using a calibration curve compensating for fluctuations in atmospheric 14C concentration. Although calibration curves are constructed from independently dated archives, they invariably require revision as new data become available and our understanding of the Earth system improves. In this volume the international 14C calibration curves for both the Northern and Southern Hemispheres, as well as for the ocean surface layer, have been updated to include a wealth of new data and extended to 55,000 cal BP. Based on tree rings, IntCal20 now extends as a fully atmospheric record to ca. 13,900 cal BP. For the older part of the timescale, IntCal20 comprises statistically integrated evidence from floating tree-ring chronologies, lacustrine and marine sediments, speleothems, and corals. We utilized improved evaluation of the timescales and location variable 14C offsets from the atmosphere (reservoir age, dead carbon fraction) for each dataset. New statistical methods have refined the structure of the calibration curves while maintaining a robust treatment of uncertainties in the 14C ages, the calendar ages and other corrections. The inclusion of modeled marine reservoir ages derived from a three-dimensional ocean circulation model has allowed us to apply more appropriate reservoir corrections to the marine 14C data rather than the previous use of constant regional offsets from the atmosphere. Here we provide an overview of the new and revised datasets and the associated methods used for the construction of the IntCal20 curve and explore potential regional offsets for tree-ring data. We discuss the main differences with respect to the previous calibration curve, IntCal13, and some of the implications for archaeology and geosciences ranging from the recent past to the time of the extinction of the Neanderthals., Radiocarbon, 62 (4), ISSN:0033-8222
208. Variety in Challenge-Based Learning in higher education
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van den Beemt, Antoine A.J., van de Watering, Gerard, Bots, Michael, Heiss, Hans-Ulrich, Jarvinen, Hannu-Matti, Mayer, Annette, Schulz, Alexandra, and Group Vermunt
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evaluative case study ,educational innovation ,Evaluative case study ,higher education ,challenge-based learning ,Higher education ,Educational innovation ,Challenge-based learning - Abstract
Increasingly higher education programs are made open and flexible to face challenges demanded by societal changes. Challenge-based learning (CBL) is perceived as an educational concept shaping these open and flexible programs. However, CBL as a field of research is still in its infancy. The present study searches for all-embracing commonalities of CBL in engineering education. We propose an evaluative framework that both includes commonalities and allows for variety in CBL characteristics between study components. This framework, labelled CBL-compass, serves as a methodological approach for educational staff and researchers to visualise the local colour of CBL in higher education institutions. With this study we aim to advance the field by contributing to a conceptual basis in flexibility in CBL. Our research question was: How can we assess the variety of CBL implementations in engineering education experiments? This question was answered by an evaluative case study. First, existing literature on CBL was scoped. The characteristics following from this review were perceived as dimensions, each with associated indicators. Empirical data were collected from an evaluation of six CBL experiments. The variety of scores on the CBL-compass gave an impression of how teachers implemented CBL in their course or project and can thus be used as an evaluation mechanism to improve this implementation. Filling in the CBL-compass triggered reflection among teachers about their course and CBL. The added value of the CBL-compass is the attention for, amongst others assessment or teacher skills and support, which are important for the overall quality of study components.
209. Comparison of PAM50 and Oncotype-DX Risk Scores and Sub-Signatures for Prediction of Tumor Response Following Neoadjuvant Chemotherapy of Luminal-Subtype Breast Cancer
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Schulz, Alexandra, Kirchner, Martina, Charoentong, Pornpimol, Kommoss, Felix, Herpel, Esther, Stenzinger, Albrecht, Heublein, Sabine, Braun, Elisa, Fremd, Carlo, Heil, Joerg, Schneeweiss, Andreas, and Hans-Peter Sinn
210. Overexpression of TOSO in CLL Is Triggered by B-Cell Receptor Signaling and Associated with Progressive Disease.
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Pallasch, Christian P, Schulz, Alexandra, Kutsch, Nadine, Schwamb, Janine, Hagist, Susanne, Wickenhauser, Claudia, Ultsch, Alfred, Kashkar, Hamid, Hallek, Michael, and Wendtner, Clemens-Martin
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Resistance towards apoptotic stimuli mediated by overexpression of antiapoptotic factors or extracellular survival signals like B-cell receptor stimulation (BCR) are considered to be responsible for accumulation of malignant B cells in CLL . TOSO, also known as Fas-inhibitory molecule 3 (FAIM3), was identified as overexpressed candidate gene in CLL based on re-evaluation of publicly available microarray data sets. Based on primary CLL samples from 106 patients, TOSO expression was compared to healthy donor B cells using quantitative real-time PCR, western-blot, flow cytometry and immunohistochemistry. To reveal underlying mechanisms of TOSO overexpression, B-cell receptor (BCR) and CD40Ligand stimulation as well as bone marrow stroma cell co-incubation was performed. Apoptotic resistance was assessed by annexin V/7-AAD flow cytometry in context of CH11-Fas-agonistic antibody. TOSO was identified to exhibit elevated relative expression of 6.8 compared to healthy donor B cells using quantitative real-time PCR (p=0.004). High levels of TOSO expression in CLL correlated with high leukocyte count, advanced Binet stage, previous need for chemotherapy and unmutated IgVH status. CD38+ CLL subsets harboring proliferative activity showed significantly enhanced TOSO expression. Immunohistochemistry revealed upregulation of TOSO in lymph nodes of CLL patients. In lymph nodes derived from healthy donors TOSO was detected in single plasmocytoid cells within the germinal center and in the marginal zone. No specific staining was seen in follicular lymphomas. CLL-specific upregulation of TOSO was confirmed by RT-PCR, samples of follicular lymphomas, DLBCL, marginal zone lymphoma and Hodgkin cell lines did not reveal TOSO up-regulation. We evaluated functional mechanisms of aberrant TOSO expression in CLL cells and identified TOSO expression significantly being induced by BCR-stimulation compared to control cells (relative expression (RE) 8.25 vs. 4.86, p=0.013). In contrast, CD40L signaling significantly reduced TOSO expression (RE 2.60; p=0.007). Spontaneous apoptosis of CLL cells was significantly reduced by BCR-stimulus, in CD40Ligandstimulated CLL samples a slight sensitization towards Fas-mediated apoptosis was seen. In summary, we show that the anti-apoptotic factor TOSO is associated with progressive disease and enhanced in the proliferative CD38+ cell subset. Both association with unmutated IgVH and the specific induction of TOSO via the BCR suggest autoreactive BCR signaling as a key mediator of apoptosis resistance in CLL. Down-regulation of TOSO by CD40Ligand in the context of CD40Ligand-mediated Fas-sensitization of CLL reveal TOSO as a new anti-apoptotic factor in CLL. CLL-specific over-expression of the transmembrane protein might further offer new therapeutic strategies in CLL treatment.
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- 2008
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211. Investigating the Clinical Profile of Suicide Attempters Who Used a Violent Suicidal Means.
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Lübbert, Marlehn, Bahlmann, Lydia, Sobanski, Thomas, Schulz, Alexandra, Kastner, Ulrich W., Walter, Martin, Jollant, Fabrice, and Wagner, Gerd
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SENSATION seeking , *SUICIDE , *MULTIVARIATE analysis , *ATTEMPTED suicide , *SUICIDAL ideation , *SUICIDE victims , *HYPOKINESIA - Abstract
In our study, we aimed to explore the profile of the high-risk subgroup of suicide attempters that used a violent means compared to suicide attempters that chose a non-violent suicide means. Therefore, we recruited a sample of inpatients with recent suicide attempts in three psychiatric hospitals in Thuringia, Germany. We used a structured clinical interview to assess the psychiatric diagnoses, sociodemographic data, and characteristics of the suicide attempt. Furthermore, we used several validated clinical questionnaires to measure suicidal ideations, suicide intent, depression severity, hopelessness, impulsivity, aggression, anger expression, and childhood trauma. We compared 41 individuals using violent means to 59 using non-violent means with univariate and multivariate statistical analyses. We found significantly (corrected for multiple comparisons) higher levels of impulsivity-related sensation-seeking in violent suicide attempters in univariate and multivariate analyses, and additionally in anger expression directed inward at an uncorrected statistical threshold. Besides that, there were no significant differences between the two groups. We assume that underlying neurocognitive mechanisms, such as impaired decision-making processes and/or differences in risk/loss assessment, could explain the higher levels of questionnaire-based sensation-seeking in subjects who use violent suicide means. Further research is needed, including neuroimaging and biochemical techniques, to gain more insight into the mechanisms underlying the choice of a suicidal means. [ABSTRACT FROM AUTHOR]
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- 2022
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212. Determining Bruise Etiology in Muscle Tissue Using Finite Element Analysis.
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Tang, Kevin, Sharpe, Wyatt, Schulz, Alexandra, Tam, Edric, Grosse, Ian, Tis, John, and Cullinane, Dennis
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ETIOLOGY of diseases , *CAPILLARY leak syndrome , *FINITE element method , *BLUNT trauma , *PSYCHOLOGICAL stress , *FORENSIC sciences , *SHEARING force , *DIAGNOSIS - Abstract
Bruising, the result of capillary failure, is a common physical exam finding due to blunt trauma and, depending on location and severity, a potential indicator of abuse. Despite its clinical relevance, few studies have investigated the etiology of capillary failure. The goal of this study was to determine whether capillaries primarily fail under shear stress or hydraulic-induced tensile stress. An arteriole bifurcating into four capillaries was modeled using ANSYS 14.0 ®. The capillaries were embedded in muscle tissue and a pressure of 20.4 kPa was applied. Any tensile stress exceeding 8.4 × 104 Pa was considered failure. Results showed that failure occurred directly under the impact zone and where capillaries bifurcated, rather than along the line of greatest shear stress, indicating that internal tensile stress is likely the primary mode of capillary failure in bruising. These results are supported by the concept that bruising can occur via blunt trauma in which no shearing lacerations occur. [ABSTRACT FROM AUTHOR]
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- 2014
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213. Scoping review and characteristics of publicly available checklists for assessing clinical trial feasibility.
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Gloy, Viktoria, Speich, Benjamin, Griessbach, Alexandra, Taji Heravi, Ala, Schulz, Alexandra, Fabbro, Thomas, Magnus, Christiane Pauli, McLennan, Stuart, Bertram, Wendy, and Briel, Matthias
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CLINICAL trials , *PILOT projects , *FEASIBILITY studies , *TEAMS in the workplace - Abstract
Background: Whether there is sufficient capacity and capability for the successful conduct and delivery of a clinical trial should be assessed by several stakeholders according to transparent and evidence-based criteria during trial planning. For this openly shared, user-tested, and validated tools are necessary. Therefore, we systematically examined the public availability and content of checklists which assess the study-level feasibility in the planning phase of clinical trials.Methods: In our scoping review we systematically searched Medline, EMBASE, and Google (last search, June 2021). We included all publicly available checklists or tools that assessed study level feasibility of clinical trials, examined their content, and checked whether they were user-tested or validated in any form. Data was analysed and synthesised using conventional content analysis.Results: A total of 10 publicly available checklists from five countries were identified. The checklists included 48 distinct items that were classified according to the following seven different domains of clinical trial feasibility: regulation, review and oversight; participant recruitment; space, material and equipment; financial resources; trial team resources; trial management; and pilot or feasibility studies. None of the available checklists appeared to be user-tested or validated.Conclusions: Although a number of publicly available checklists to assess the feasibility of clinical trials exist, their reliability and usefulness remain unclear. Openly shared, user-tested, and validated feasibility assessment tools for a better planning of clinical trials are lacking. [ABSTRACT FROM AUTHOR]- Published
- 2022
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214. Early Life Maternal Separation and Maternal Behaviour Modulate Acoustic Characteristics of Rat Pup Ultrasonic Vocalizations.
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Kaidbey, Jasmine H., Ranger, Manon, Myers, Michael M., Anwar, Muhammad, Ludwig, Robert J., Schulz, Alexandra M., Barone, Joseph L., Kolacz, Jacek, and Welch, Martha G.
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PREMATURE infants , *NEONATAL intensive care , *NEURODEVELOPMENTAL treatment for infants , *NEUROBEHAVIORAL disorders , *INFANT development - Abstract
Early separation of preterm infants from their mothers has adverse, long-term neurodevelopmental consequences. We investigated the effects of daily maternal separation (MS) of rat pups from postnatal days 2–10 (PND2–10) on neurobehavioural responses to brief isolation at PND12 compared with pups receiving controlled handling without MS. Ultrasonic vocalizations (USV) were measured at PND12 during two, 3-minute isolations occurring immediately before and after a 3-minute maternal reunion. There were no significant differences in acoustic characteristics between MS and control animals in the first isolation. However, in the second isolation, MS pups produced a greater proportion of high (~60 kHz) vs low (~40 kHz) frequency calls. During this isolation, control pups made longer and louder low frequency calls compared to the first isolation, whereas MS pups did the opposite. Maternal behaviour of control and MS mothers modulated pup acoustic characteristics in opposite directions; higher maternal care was associated with more low frequency calls in control pups but more high frequency calls in MS pups. We hypothesize that MS results in USV emission patterns reflective of a greater stress response to isolation. This translational model can be used to identify mechanisms and interventions that may be exploited to overcome the negative, long-term effects of MS. [ABSTRACT FROM AUTHOR]
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- 2019
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215. Evaluation of scar quality after treatment of superficial burns of the hands and face with Dressilk or Biobrane-An intra-individual comparison.
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Schiefer, Jennifer Lynn, Rath, Rebekka, Ahrens, Elena, Grigutsch, Daniel, Gräff, Ingo, Stromps, Jan-Philipp, Fuchs, Paul Christian, and Schulz, Alexandra
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SCARS , *BURNS & scalds , *TREATMENT for burns & scalds , *SKIN care , *MELANINS , *BURNS & scalds complications , *THERAPEUTIC use of biomedical materials , *OXYGEN metabolism , *AESTHETICS , *ELASTICITY , *FACIAL injuries , *HAND injuries , *PROTEINS , *SKIN , *SPECTRUM analysis , *SURGICAL dressings , *WOUND healing , *DISEASE complications , *THERAPEUTICS - Abstract
Introduction: The aesthetic outcome after burn of exposed areas such as the hand and face is of high importance. A number of wound dressings used for the treatment of superficial and partial thickness burns promise rapid wound healing and reduced scarring. Previously, wound healing of hands and faces with superficial burns treated with Dressilk® compared to Biobrane® was evaluated intra-individually with similar results. Nevertheless, up to date objective information regarding the scarring after superficial burns treated with Dressilk® does not exist.Methods: Therefore, 30 patients with superficial burns of the hand and face that were treated with Dressilk® and Biobrane® simultaneously were included in the study. An objective scar evaluation was performed analyzing melanin and erythema levels, skin elasticity, trans-epidermal water loss and scar perfusion three and six and 12 months after injury. Furthermore, a subjective scar evaluation was performed with the patient and observer scar assessment scale (POSAS) and the Vancouver scar scale (VSS).Results: Dressilk® and Biobrane® both lead to an aesthetic pleasing outcome after superficial burns of the hands and faces. Regarding the objective scar evaluation only trans-epidermal water loss of burned hands after 6 months showed significant differences between the two dressings. However, these differences were not detected in the 12-month follow up examination. In the subjective scar evaluation no statistical differences could be found between the dressings. All patients stated high satisfaction of scar quality.Conclusion: Dressilk® is an interesting alternative to Biobrane® for the treatment of superficial burns of aesthetic and functional important areas. [ABSTRACT FROM AUTHOR]- Published
- 2018
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216. Eschar removal by bromelain based enzymatic debridement (Nexobrid®) in burns: An European consensus.
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Hirche, Christoph, Citterio, Antonella, Hoeksema, Henk, Koller, Ján, Lehner, Martina, Martinez, José Ramón, Monstrey, Stan, Murray, Alexandra, Plock, Jan A., Sander, Frank, Schulz, Alexandra, Ziegler, Benjamin, and Kneser, Ulrich
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TREATMENT for burns & scalds , *BROMELIN , *DEBRIDEMENT , *SKIN grafting , *ENZYMATIC analysis , *BURNS & scalds complications , *PROTEOLYTIC enzymes , *PAIN management , *DERMIS , *SURGICAL blood loss , *CONSENSUS (Social sciences) , *DISEASE complications , *SCARS , *SURGERY , *PREVENTION , *THERAPEUTICS - Abstract
Early debridement and/or eschar removal is regarded as a significant step in the treatment of deep partial and full thickness burns. It aims to control wound bioburden and allows early wound closure by conservative treatment or skin grafting. Preservation of viable dermis accompanied by early wound closure, is regarded as a necessary step to reduce scar related complication, e.g. functional limitations and/or unaesthetic scar formation. Aside from the classical techniques of surgical excision as tangential excision for eschar removal, hydro-surgery, maggot therapy, laser, enzymatic debridement have been described as additional techniques in the burn surgeon's armamentarium. It is widely accepted that early eschar removal within 72h improves the outcome of burn wound treatment by reducing bacterial wound colonization, infection and length of hospital stay. In contrast, the right technique for eschar removal is still a matter of debate. There is increasing evidence that enzymatic debridement is a powerful tool to remove eschar in burn wounds, reducing blood loss, the need for autologous skin grafting and the number of wounds requiring surgical excision. In order to assess the role and clinical advantages of enzymatic debridement by a mixture of proteolytic enzymes enriched in Bromelain (Nexobrid®) beyond the scope of the literature and in view of users' experience, a European Consensus Meeting was scheduled. The aim was to provide statements for application, based on the mutual experience of applying enzymatic debridement in more than 500 adult and pediatric patients by the consensus panelists. Issues to be addressed were: indications, pain management and anesthesia, timing of application, technique of application, after-intervention care, skin grafting after enzymatic debridement, blood loss, training strategies and learning curve and areas of future research needs. Sixty-eight (68) consensus statements were provided for the use of enzymatic debridement. The degree of consensus was remarkably high, with a unanimous consensus in 88.2% of statements, and lowest degree of consensus of 70% in only 3 statements. This consensus document may serve as preliminary guideline for the use of enzymatic debridement with user-oriented recommendations until further evidence and systematic guidelines are available. [ABSTRACT FROM AUTHOR]
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- 2017
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217. A prospective intra-individual evaluation of silk compared to Biobrane for the treatment of superficial burns of the hand and face.
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Schiefer, Jennifer Lynn, Arens, Elena, Grigutsch, Daniel, Rath, Rebekka, Hoffmann, Alexandra, Fuchs, Paul Christian, and Schulz, Alexandra
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TREATMENT for burns & scalds , *PAIN management , *WOUND healing , *SURGICAL dressings , *SILK , *LONGITUDINAL method , *BURNS & scalds complications , *THERAPEUTIC use of proteins , *THERAPEUTIC use of biomedical materials , *BIOMEDICAL materials , *COMPARATIVE studies , *COST effectiveness , *EXUDATES & transudates , *FACIAL injuries , *HAND injuries , *HEMORRHAGE , *INFLAMMATION , *RESEARCH methodology , *MEDICAL cooperation , *PAIN , *PROTEINS , *RESEARCH , *SCARS , *EVALUATION research , *DISEASE complications , *THERAPEUTICS - Abstract
Introduction: An ever-increasing number of commercially available dressings have been applied to treat superficial burns with the aim to reduce pain and inflammation and lead to a fast wound healing and scar reduction. Nevertheless the search for cheap and effective wound dressing proceeds. Dressilk® consisting of silkworm silk showed good results for wound healing in regards to scarring, biocompatibility and reduction of inflammation and pain. Therefore it seemed to be an interesting product for the treatment of superficial burns.Methods: In a prospective intra-individual study the healing of superficial burns was evaluated after the treatment with Dressilk® and Biobrane® in 30 patients with burns of the hand and face. During wound healing pain, active bleeding, exudation, dressing change and inflammation were evaluated using the Verbal Rating Scale 1-10. Three months later scar appearance was assessed by VSS (Vancouver Scar Scale) and POSAS (Patient and Observer Scar Scale).Results: With regard to re-epithelialization, pain, inflammation and acute bleeding both dressings were equivalent. High subjective satisfaction rates were reported for both Dressilk® and Biobrane® dressings in regard to comfort and mobility of the face. Biobrane®, applied as a glove was subjectively preferred for burns of the hand. Regarding their cost efficiency Dressilk® was clearly superior to Biobrane®. Long-term results were similar.Conclusion: The "ideal" wound dressing maximizes patients' comfort while reducing pain and promoting wound healing. Dressilk® and Biobrane® both provided an effective and safe healing environment, showing low overall complication rates with respect to infection and exudation on superficial burns of the hand and face. Therefore Dressilk®, being clearly superior to Biobrane® in cost efficiency is an interesting alternative especially for the treatment of superficial burns of faces. [ABSTRACT FROM AUTHOR]- Published
- 2017
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218. Etiology, incidence and gender-specific patterns of severe burns in a German Burn Center - Insights of 25 years.
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Schiefer, Jennifer Lynn, Perbix, Walter, Grigutsch, Daniel, Zinser, Max, Demir, Erhan, Fuchs, Paul Christian, and Schulz, Alexandra
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BURNS & scalds , *ETIOLOGY of diseases , *DISEASE incidence , *BURN care units , *RETROSPECTIVE studies , *CHEMICAL burns , *ELECTRICAL burns , *FIRES , *SEX distribution , *TIME , *WOUNDS & injuries , *TRAUMA severity indices ,SEX differences (Biology) - Abstract
Introduction: Burns often require special treatment in specialized burn centers. One of the specialized German burn centers is located in Cologne-Merheim. Only little is known about the etiology of burns in Germany, their monthly distribution and changes over the past 25 years.Methods: We therefore retrospectively analyzed the etiology for all patients treated at the burn intensive care unit (BICU) of Cologne in the last 25 years and categorized them into groups. Thereafter all groups were analyzed according to distribution of age, gender and occurrence.Results: In this way we were able to show that the number of severe burns did not decrease over the time under evaluation and that it did not show seasonal variation. Injured females were older than males but fewer in number. The highest numbers of burns were related to fire, followed by electricity, hot liquids, chemicals and heat contact. Work-related burns occurred mostly with males. However, most of the burns were not work-related for either gender.Conclusion: The number of burns in Germany and in the world is still high, and prevention strategies do not always have the desired effect. This study aims to fill the gap in published burn knowledge in Germany by way of describing the gender differences and etiology characteristics. It can therefore help to identify risks and expand effective burn prevention strategies. [ABSTRACT FROM AUTHOR]- Published
- 2016
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219. SUSTAINABLE DEVELOPMENT AND THE SDGS:REVEALING ENGINEERING ACADEMICS, STUDENTS AND EMPLOYER VIEWPOINTS
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Beagon, U., Kövesi, K., Tabas, B., Nørgaard, B., Lehtinen, R., Bowe, B., Gillet, C., Spliid, C., Heiss, Hans-Ulrich, Jarvinen, Hannu-Matti, Mayer, Annette, and Schulz, Alexandra
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Awareness of SDGs ,Conceptions of Sustainable Development - Abstract
As the world’s focus turns to the future and not the present, the engineering profession must respond to the ever increasing need to bring about a sustainable future. The objective of this paper is to support the reform of engineering education by acknowledging and building upon the current awareness and understanding of sustainable development held by key stakeholders in the process. This paper presents the outcomes of a study involving twelve focus groups with Academics, Employers and Students in four European countries (Denmark, Finland, France and Ireland) as part of the A-STEP 2030 European Project. Based on the findings, it is clear that the key stakeholders closely associate the theme of the environment with Sustainable Development. There is also mention of the pillar of economy, but less so, that of society. The findings also reveal differences in the awareness of specific Sustainable Development Goals (SDGs), with SDG 13 (Climate Action) being most widely noted. The findings allow educators to engage in discussion with students to build a more complete understanding of aspects of sustainable development and to act in redesigning curricula to ensure engineers can contribute to a sustainable future.
- Published
- 2021
220. A Study Of Experiences With Distance And Online Teaching In Mechanical Engineering Courses
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Richelsen, A. B., Hansen, C. T., Heiß, Hans-Ulrich, Järvinen, Hannu-Matti, Mayer, Annette, and Schulz, Alexandra
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ComputingMilieux_COMPUTERSANDEDUCATION ,Teaching methods ,Online teaching ,Qualitative study - Abstract
Due to the university lockdown caused by COVID-19, teachers and students at the Department of Mechanical Engineering, Technical University of Denmark experienced a sudden and massive change from face-to-face to distance and online teaching in spring 2020. To obtain an overview of the tools used for online teaching and the experiences gained, the department conducted a survey among its teachers. This questionnaire consisted of two key questions: “What worked well?” and “What worked less well?”. A second survey containing similar questions was conducted by the university among all students. A qualitative analysis of the empirical data generated by the surveys provides an overview of the teaching tools and methods used after the forced conversion to distance and online teaching. The analysis illuminates the strengths and weaknesses of the different teaching methods, from both teachers’ and students’ perspectives. Based on the findings, recommendations are made to support teachers as they guide students towards learning strategies that best fit the chosen teaching methods.
- Published
- 2021
221. E-learning as means to facilitate successful transition from an engineering bachelor to a technical Master’s program with anthropological and ethical content
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Børsen, Tom, Cardeno, Jorge Ivan Contreras, Heiß, Hans-Ulrich, Järvinen, Hannu-Matti, Mayer, Annette, Schulz, Alexandra, Wipper, Anja, and Schumann, Uta
- Abstract
The transition between BSc and MSc study programs can be challenging – especially if a student changes from one discipline to another, for example, when an engineering bachelor changes to the master’s program in Techno-Anthropology (T-A) at Aalborg University, which is a technical master’s program with anthropological and ethical content. To facilitate such transitions, Aalborg University allocated funding to develop and offer the e-course “Introduction to Techno-Anthropology”. The e-course is a set of seven modules introducing the central concepts and methods of T-A to applicants without a bachelor degree in T-A. This paper sketches the design and provides a technology assessment of this e-course to determine how it could be improved and applied to ease the transition between different study-programmes that face similar challenges.
- Published
- 2021
222. Using Technology Assessment in Technical Study Programs as a means to foster ethical reflections on the societal effects of technologies and engineering solutions
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Børsen, Tom, Heiß, Hans-Ulrich, Järvinen, Hannu-Matti, Mayer, Annette, Schulz, Alexandra, Wipper, Anja, and Schumann, Uta
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Technology Assessment ,Engineering Ethics Education ,ComputingMilieux_COMPUTERSANDEDUCATION ,ethics - Abstract
To dissiminate knowledge of Technology Assessment (TA) to the engineering ethics education research community this paper provides an overview of existing TAmodels: consequentialist TA, interdisciplinary TA, ethical TA, hermeneutical TA, participatory TA, and constructivist TA. The central result of the presented work is ananalysis of how the different TA models compare to the science – society interface, including how the models relate to ethics, roles of experts, participation of stakeholders and the public, and output formats. It briefly mentions how the models are introduced in classes and used by students at Aalborg University in the 2ndsemester of the bachelor program in Techno-Anthropology. Feedback from students indicate that they request concrete instructions on how to apply the models in their project work. All this to provide an argument for initiating research in how TA can be taught in Technical Study Programs as a means to foster ethical reflections on the societal effects of technologies and engineering solutions.
- Published
- 2021
223. Concept for external quality assurance of an institute's course portfolio
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Bock-Poulsen, Lars, Larsen, Samuel Brüning, Heiß, Hans-Ulrich, Järvinen, Hannu-Matti, Mayer, Annette, and Schulz, Alexandra
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ComputingMilieux_COMPUTERSANDEDUCATION ,Future skills ,Course evaluation ,Quality assurance ,Engineering education - Abstract
In most manufacturing firms, processes and products undergo continuous and often rigorous quality assurance (QA). Such QA-systems ensure that products adhere to quality standards and specifications. In addition, a firm’s sales numbers are a direct measure of the continuous relevance and attractiveness of the firm’s products. Universities ‘produce’ courses. Some courses teach fundamentals (e.g. mathematics and physics), while others teach specific methods for application in graduates’ future careers. Ideally, the skillset that students receive from the specific-method-courses should continuously develop. However, courses often run for decades without enacting necessary changes, and when change happens, the reasons are often student dissatisfaction or new instructors. Most universities have elaborate systems for student evaluations, while inputs from employers and the wider society are scarce. Skillsets must develop in concert with employer needs, technological progress, and the wider needs of society. This paper presents a system for course quality assurance (CQA-system) developed at the center for bachelor of engineering studies at the Technical University of Denmark. The CQA-system is inspired by manufacturing industries, were quality assurance has a long history. The system includes a four-step process for the quality assurance of individual courses, a procedure for selecting courses for review, and principles for organizing the overall effort in an institute’s management infrastructure.
- Published
- 2021
224. Designing open innovation problem-based projects:social relevance, student expectations and preliminary observations
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Teo, Elisha Anne, Børsen, Tom, Triantafyllou, Evangelia, Cardeno, Jorge Ivan Contreras, Karadechev, Petko, Heiß, Hans-Ulrich, Järvinen, Hannu-Matti, Mayer, Annette, and Schulz, Alexandra
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ComputingMilieux_COMPUTERSANDEDUCATION - Abstract
In this concept paper, we present insights from an ongoing online interdisciplinary project with a “Technology and Migration” theme. The project is initiated by course coordinators from Medialogy and Techno-Anthropology at Aalborg University, issupported by the United Nations Refugee Agency (UNHCR) and is carried out by Bachelor and Master students from the two programs. We present the design of an open innovation problem-based educational activity, where different stakeholders facilitate student engagement in real-world issues regarding technology and migration. We present observations and results from a student survey, reporting on their motivations, expectations, and reactions to the format. We conclude with theexpected outcomes and some preliminary results of the initiative.
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- 2021
225. Changes of adaptability strategies to Problem-Based Learning:A longitudinal study of first-year Chinese engineering graduate students
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Jiang, Dan, Dahl, Bettina, Bøgelund, Pia, Heiß, Hans-Ulrich, Järvinen, Hannu-Matti, Mayer, Annette, and Schulz, Alexandra
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first-year graduate ,Chinese engineering students ,PBL ,ComputingMilieux_COMPUTERSANDEDUCATION ,adaptability strategies - Abstract
Problem- and project-based Learning (PBL) has been acknowledged and practiced as one of the widely accepted and innovative methods in engineering education over the last forty years at Aalborg University (AAU) in Denmark. However, the transition from lecture-based traditional learning to PBL represents a major challenge, especially for international students who have no prior knowledge and experience in PBL. In addition, more transition issues are raised by overseas students from China due to the differences in language, culture, learning styles etc. To remain and prosper in a new and competitive PBL learning environment, these engineering students must develop adaptability skills, which means that they must finds ways to fit into and learn through PBL. Our previous study has identified that first-year Chinese graduate engineering students’ preferred adaptability strategies are integration, assimilation and separation when adapting to PBL in their first semester at AAU. In order to enrich our understanding of adaptability as a changing process, the current longitudinal research extends the focus to the changes of the students’ choice of adaptability strategies to PBL over time and aims to explore the factors which influence their selection. Four Chinese engineering graduate students were followed through consecutive semistructured interviews during their second semester at AAU. The results indicate that both integration and separation strategies are the favored adaptability strategies at this stage. Moreover, some factors relating to PBL courses, teamwork, communication and language proficiency impact these Chinese engineering students’ preferences for different adaptability strategies.
- Published
- 2021
226. Erufosine, a novel alkylphosphocholine, induces apoptosis in CLL through a caspase-dependent pathway
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Königs, Sonja Katharina, Pallasch, Christian Philipp, Lindner, Lars Hartwin, Schwamb, Janine, Schulz, Alexandra, Brinker, Reinhild, Claasen, Julia, Veldurthy, Aditya, Eibl, Hansjoerg, Hallek, Michael, and Wendtner, Clemens-Martin
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- *
CHRONIC lymphocytic leukemia treatment , *ANTINEOPLASTIC agents , *PHOSPHOLIPIDS , *APOPTOSIS , *LIPID metabolism , *CELLULAR signal transduction , *PHOSPHORYLATION , *THERAPEUTICS - Abstract
Abstract: The alkylphosphocholine (APC) erufosine is a synthetic phospholipid analogue with antineoplastic activity. APC are known to interact with lipid metabolism and modulate cellular signaling pathways, particularly the phosphorylation of Akt. Here, in primary CLL cells induction of apoptosis was detected with an IC50 of 22μM whereas healthy donor PBMC were less sensitive towards erufosine. Treatment with erufosine caused dose-dependent cleavage of PARP, co-incubation with caspase inhibitor z-VAD almost completely abrogated the cytotoxic effect of erufosine indicating a caspase-dependent mechanism of erufosine. Erufosine was shown to induce apoptosis in primary CLL cells and merits further investigation regarding therapeutic options in CLL. [Copyright &y& Elsevier]
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- 2010
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227. Implementing peer feedback in practice – a case study
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Hanne Løje, Qvistgaard, N., Pernille Erland Jensen, Heiß, Hans-Ulrich, Järvinen, Hannu-Matti, Mayer, Annette, and Schulz, Alexandra
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Peer feedback ,ComputingMilieux_COMPUTERSANDEDUCATION ,Formative feedback - Abstract
Formative feedback is well known as an effective learning tool [1] as it improves metacognitive competences and self-directed learning.Peer feedback has been a learning activity used in higher education for many years and it involves feedback from one student to another student [2] . Peer feedback increases the amount of feedback for individual students and also strengthens the students’ skills in giving and receiving feedback. However, peer feedback needs to be instructed and supported, for example by having rubrics and clear rules for how to provide feedback. One way to obtain this, it is to use the program Peergrade.io. The program Peergrade.io supports assignment submission and the feedback process itself. The system provides overview of the students’activity as well as their feedback process.In this study, we investigated the implementation of peer feedback in an interdisciplinary course with focus on entrepreneurship. We discuss the theory behind peer feedback as a learning activity in teaching, discuss our findings from our case study and give suggestions for further use of peer feedback. We used the program Peergrade.io for peer feedback for evaluation of a portfolio based on the students’ work with entrepreneurial methods. The data are reflections from the students after they had been giving and received feedback from fellow students.The results shows a positive attitude towards peer feedback and it was recognized as a good tool for feedback. However clear instructions and rubrics are important.
228. Rapid switch from face-to-face workshops to online workshops
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Erja Sipilä, Charlotta Elo, Emmi-Lotta Rauhala, Tiina Ihalainen, Johanna Virkki, Heiß, Hans-Ulrich, Järvinen, Hannu-Matti, Meyer, Annette, Schulz, Alexandra, Wipper, Anja, Tampere University, Electrical Engineering, Welfare Sciences, and BioMediTech
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213 Electronic, automation and communications engineering, electronics - Abstract
During 2020, the COVID-19 pandemic required many higher education institutes, including engineering education, to quickly switch all face-to-face lessons and meetings to remote meetings and teaching sessions. This situation forced us all to rapidly create new ways to interact, work and study remotely. We had planned to organize five face-to-face multiprofessional ideation workshops in spring 2020 to create unbiased and innovative ideas related to smart clothing. COVID-19 forced us to replace the planned face-to-face workshops with five online workshops. We chose one video meeting platform for that purpose. Overall, online workshops proved to be an effective way to gather diverse ideas. The work went smoothly, although the video meeting platform was new to some participants. Online workshops are an easy way to bring together people regardless of geographical distances. Even though the organized workshops were for research purposes, we think similar workshops are very suitable for online teaching as well. We believe online workshops will be here to stay after COVID-19, as they are a great option when hybrid teaching and working take place. publishedVersion
229. CHanging to the better? Experiences from turning a hands-on innovation course into an online course
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Sara Grex, Nielsen, A. P., Torben Hede, Heiß, Hans-Ulrich, Järvinen, Hannu-Matti, Mayer, Annette, and Schulz, Alexandra
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Online innovation teaching ,ComputingMilieux_COMPUTERSANDEDUCATION - Abstract
During the times of Covid-19 and the different degrees of lockdowns, we had to rethink central elements in a hands-on experiential course on innovation and crossdisciplinary teamwork, turning it into a fully online course or blending a few physical campus activities with online elements. In this concept paper, we report on and reflect on our experiences, experiments, and learnings from transforming a hands-on experiential course on innovation and crossdisciplinary teamwork into a fully online course or blending a few physical campus activities with online elements during the Covid 19 lockdown.The paper builds on three full course runs from spring 2020, summer 2020, winter 2020, and a fourth run started up in spring 2021. Our experience, challenges, experiments, learnings, and reflections are organized into six themes; prototypes and prototyping, collaboration within the team, collaboration with external partners and data collection, online team formation, the facilitation process, and the presentation of the solution to the company. Among others, the results include experiences like this: Without having access to campus and workshops, the students worked with a broader range of prototypes and created more of them during the innovation process. This experience draws more attention to the prototyping process than the prototype itself and highlights the learning potential for more iterations than just one version of the solution. The paper includes similar examples and reflections for all six themes.We discuss what we can learn from these experiences and which elements are relevant to maintain and develop further in a post-corona setup. The discussion also includes which initiatives are needed to support further development and implementation of these elements both from a course organizing perspective and a learning-enhancing perspective.
230. Nodal Burden and Oncologic Outcomes in Patients With Residual Isolated Tumor Cells After Neoadjuvant Chemotherapy (ypN0i+): The OPBC-05/ICARO Study.
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Montagna G, Laws A, Ferrucci M, Mrdutt MM, Sun SX, Bademler S, Balbaloglu H, Balint-Lahat N, Banys-Paluchowski M, Barrio AV, Benson J, Bese N, Boughey JC, Boyle MK, Diego EJ, Eden C, Eller R, Goldschmidt M, Hlavin C, Heidinger M, Jelinska J, Karadeniz Cakmak G, Kesmodel SB, King TA, Kuerer HM, Loesch J, Milardi F, Murawa D, Moo TA, Menes TS, Passeri D, Pastoriza JM, Perhavec A, Pislar N, Polidorio N, Rami A, Ryu JM, Schulz A, Sevilimedu V, Ugurlu MU, Uras C, van Hemert A, Wong SM, Yoo TR, Zhang JQ, Karanlik H, Cabioğlu N, Peeters MV, Morrow M, and Weber WP
- Abstract
Purpose: The nodal burden of patients with residual isolated tumor cells (ITCs) in the sentinel lymph nodes (SLNs) after neoadjuvant chemotherapy (NAC) (ypN0i+) is unknown, and axillary management is not standardized. We investigated rates of additional positive lymph nodes (LNs) at axillary lymph node dissection (ALND) and oncologic outcomes in patients with ypN0i+ treated with and without ALND., Methods: The Oncoplastic Breast Consortium-05/ICARO cohort study (ClinicalTrials.gov identifier: NCT06464341) retrospectively analyzed data from patients with stage I to III breast cancer with ITCs in SLNs after NAC from 62 centers in 18 countries. The primary end point was the 3-year rate of any axillary recurrence. The rate of any invasive recurrence was the secondary end point., Results: In total, 583 patients were included, of whom 182 (31%) had completion ALND and 401 (69%) did not. The median age was 48 years. Most patients (74%) were clinically node-positive at diagnosis and 41% had hormone receptor-positive/human epidermal growth factor receptor 2-negative tumors. The mean number of SLNs with ITCs was 1.2. Patients treated with ALND were more likely to present with cN2/3 disease (17% v 7%, P < .001), have ITCs detected on frozen section (62% v 8%, P < .001), have lymphovascular invasion (38% v 24%, P < .001), and receive adjuvant chest wall (89% v 78%, P = .024) and nodal radiation (82% v 75%, P = .038). Additional positive nodes were found at ALND in 30% of patients, but only 5% had macrometastases. The 3-year rates of any axillary and any invasive recurrence were 2% (95% CI, 0.95 to 3.6) and 11% (95% CI, 8 to 14), respectively, with no statistical difference by type of axillary surgery., Conclusion: The nodal burden in patients with ypN0(i+) was low, and axillary recurrence after ALND omission was rare in patients selected for this approach. These results do not support routine ALND in all patients with ypN0(i+).
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- 2024
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231. Enhancing patient informed consent in elective skin cancer surgeries: a comparative study of traditional and digital approaches in a German public hospital.
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Schulz A and Bohnet-Joschko S
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- Humans, Female, Male, Germany, Middle Aged, Prospective Studies, Aged, Adult, Aged, 80 and over, Surveys and Questionnaires, Decision Making, Shared, Informed Consent, Elective Surgical Procedures, Hospitals, Public, Skin Neoplasms surgery, Patient Satisfaction
- Abstract
Background: This study aims to investigate the integration of modern sources of patient information, such as videos, internet-based resources, and scientific abstracts, into the traditional patient informed consent process in outpatient elective surgeries. The goal is to optimize the informed consent experience, enhance patient satisfaction, and promote shared decision making (SDM) between patients and surgeons. By exploring different patient informed consent formats and their impact on patient satisfaction, this research seeks to improve healthcare practices and ultimately enhance patient outcomes. The findings of this study will contribute to the ongoing efforts to improve the informed consent process in public hospitals and advance patient-centred care., Methods: Data collection occurred at the day care clinic of a prominent German public hospital, forming an integral component of a prospective clinical investigation. The study exclusively focused on individuals who had undergone surgical intervention for skin cancer. For the purpose of meticulous data examination, the statistical software SPSS version 21 was harnessed. In the course of this study, a chi-square test was aptly employed. Its purpose was to scrutinize the nuances in patient experiences pertaining to informed consent across four distinct categories, viz., oral informed consent discussion (Oral ICD), written informed consent discussion (Written ICD), video-assisted informed consent discussion (video-assisted ICD), and digitally assisted informed consent discussion (digital-assisted ICD). The primary dataset of this inquiry was diligently gathered via a structured questionnaire administered to a targeted cohort of 160 patients. Within this sample, a balanced representation of genders was observed, encompassing 82 males and 78 females. Their collective age span ranged from 18 to 92 years, with an average age of 71 years. A randomized selection methodology was employed to include participants in this study during the period spanning from July 2017 to August 2018., Results: Significant differences were observed across the groups for all research questions, highlighting variations in patient responses. Video-assisted and digital-assisted IC were rated as superior in patient satisfaction with information compared to written and oral IC. Demographic profiles of the four study groups were found to be comparable., Conclusion: The findings of this study indicate that the incorporation of digital technologies in the informed consent process can enhance patient understanding during outpatient elective skin cancer surgeries. These results have important implications for increasing patient satisfaction and improving the SDM process within the hospital environment., (© 2024. The Author(s).)
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- 2024
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232. Assessing the Effect of Enzymatic Debridement on the Scar Quality in Partial-Thickness Burns to Deep Dermal Burns of the Hand: A Long-Term Evaluation.
- Author
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Heitzmann W, Schulz A, Fuchs PC, and Schiefer JL
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- Humans, Male, Female, Wound Healing, Debridement methods, Bromelains, Erythema, Water, Cicatrix surgery, Burns complications, Burns surgery
- Abstract
Background and Objectives: Burn surgery on the hands is a difficult procedure due to the complex anatomy and fragility of the area. Enzymatic debridement has been shown to effectively remove burn eschar while minimizing damage to the surrounding tissue and has therefore become a standard procedure in many burn centers worldwide over the past decade. However, surprisingly, our recent literature review showed limited valid data on the long-term scarring after the enzymatic debridement of the hands. Therefore, we decided to present our study on this topic to fill this gap. Materials and Methods: This study analyzed partial-thickness to deep dermal burns on the hands that had undergone enzymatic debridement at least 12 months prior. Objective measures, like flexibility, trans-epidermal water loss, erythema, pigmentation, and microcirculation, were recorded and compared intraindividually to the uninjured skin in the same area of the other hand to assess the regenerative potential of the skin after EDNX. The subjective scar quality was evaluated using the patient and observer scar assessment scale (POSAS), the Vancouver Scar Scale (VSS), and the "Disabilities of the Arm, Shoulder, and Hand" (DASH) questionnaire and compared interindividually to a control group of 15 patients who had received traditional surgical debridement for hand burns of the same depth. Results: Between January 2014 and December 2015, 31 hand burns in 28 male and 3 female patients were treated with enzymatic debridement. After 12 months, the treated wounds showed no significant differences compared to the untreated skin in terms of flexibility, trans-epidermal water loss, pigmentation, and skin surface. However, the treated wounds still exhibited significantly increased blood circulation and erythema compared to the untreated areas. In comparison to the control group who received traditional surgical debridement, scarring was rated as significantly superior. Conclusions: In summary, it can be concluded that the objective skin quality following enzymatic debridement is comparable to that of healthy skin after 12 months and subjectively fares better than that after tangential excision. This confirms the superiority of enzymatic debridement in the treatment of deep dermal burns of the hand and solidifies its position as the gold standard.
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- 2024
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233. Psychological distress among individuals with a suicide attempt or suicidal ideation and suicide attempts patterns: first two years of the pandemic.
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Groh A, Bahlmann L, Colic L, Schulz A, Kastner UW, Polzer U, Walter M, Sobanski T, and Wagner G
- Abstract
Background: The COVID-19 pandemic and related restrictions may have led to increased stress, particularly in people with mental health problems. Since stress factors play important role in the emergence of suicide attempts (SA) and suicidal ideation (SI), they may have been exacerbated by the pandemic, which could have led to an increased number of suicide attempts. Thus, we first investigated whether the pandemic affected personal stress experiences and appraisal of coping potential in individuals with and without SA and SI. In a second step, we analyzed the frequency and dynamics of SAs by patients admitted to a psychiatric university clinic over a period of four years., Methods: We examined stress experiences and appraisal of coping resources of inpatients recruited between March 2021 and February 2022 with SA (n=38), SI (n=27), and with mood disorder without SA or SI (n=45). In the second study, we investigated the time course of prospectively recorded patients with a suicide attempt (n=399) between January 1
st 2018 and December 31st 2021 using interrupted time-series Poisson regression models., Results: There was a significant main effect of group (F[2,107]=6.58, p=0.002) regarding psychological stress levels, which was significantly higher in the SA and SI groups than in the psychiatric control group. No significant differences were found in the appraisal of coping resources or in the frequency of SAs before and during pandemic. However, the pandemic had a significant impact on the seasonal pattern of SAs., Conclusions: The pandemic increased psychological stress levels in individuals with SA and SI, which may be related to SI and do not necessarily result in SA. The pandemic did not affect the overall frequency of SA between March 2020 and December 2021, but interfered with the seasonal pattern of SA occurrence. Effective intervention strategies during a pandemic should include programs to strengthen the psychological resilience of people who are susceptible to mental health problems., Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. The author(s) declared that they were an editorial board member of Frontiers, at the time of submission. This had no impact on the peer review process and the final decision., (Copyright © 2024 Groh, Bahlmann, Colic, Schulz, Kastner, Polzer, Walter, Sobanski and Wagner.)- Published
- 2024
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234. Impact of Imaging-Guided Localization on Performance of Tailored Axillary Surgery in Patients with Clinically Node-Positive Breast Cancer: Prospective Cohort Study Within TAXIS (OPBC-03, SAKK 23/16, IBCSG 57-18, ABCSG-53, GBG 101).
- Author
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Weber WP, Heidinger M, Hayoz S, Matrai Z, Tausch C, Henke G, Zwahlen DR, Gruber G, Zimmermann F, Montagna G, Andreozzi M, Goldschmidt M, Schulz A, Mueller A, Ackerknecht M, Tampaki EC, Bjelic-Radisic V, Kurzeder C, Sávolt Á, Smanykó V, Hagen D, Müller DJ, Gnant M, Loibl S, Fitzal F, Markellou P, Bekes I, Egle D, Heil J, and Knauer M
- Subjects
- Humans, Female, Sentinel Lymph Node Biopsy methods, Prospective Studies, Lymphatic Metastasis pathology, Lymph Node Excision methods, Neoadjuvant Therapy, Axilla pathology, Lymph Nodes surgery, Lymph Nodes pathology, Breast Neoplasms diagnostic imaging, Breast Neoplasms surgery, Breast Neoplasms pathology
- Abstract
Background: Tailored axillary surgery (TAS) is a novel surgical concept for clinical node-positive breast cancer. It consists of the removal of the sentinel lymph nodes (LNs), as well as palpably suspicious nodes. The TAS technique can be utilized in both the upfront and neoadjuvant chemotherapy (NACT) setting. This study assessed whether/how imaging-guided localization (IGL) influenced TAS., Patients and Methods: This was a prospective observational cohort study preplanned in the randomized phase-III OPBC-03/TAXIS trial. IGL was performed at the surgeon's discretion for targeted removal of LNs during TAS. Immediate back-up axillary lymph node dissection (ALND) followed TAS according to TAXIS randomization., Results: Five-hundred patients were included from 44 breast centers in six countries, 151 (30.2%) of whom underwent NACT. IGL was performed in 84.4% of all patients, with significant variation by country (77.6-100%, p < 0.001). No difference in the median number of removed (5 vs. 4, p = 0.3) and positive (2 vs. 2, p = 0.6) LNs by use of IGL was noted. The number of LNs removed during TAS with IGL remained stable over time (p = 0.8), but decreased significantly without IGL, from six (IQR 4-6) in 2019 to four (IQR 3-4) in 2022 (p = 0.015). An ALND was performed in 249 patients, removing another 12 (IQR 9-17) LNs, in which a median number of 1 (IQR 0-4) was positive. There was no significant difference in residual nodal disease after TAS with or without IGL (68.0% vs. 57.6%, p = 0.2)., Conclusions: IGL did not significantly change either the performance of TAS or the volume of residual nodal tumor burden., Trial Registration: ClinicalTrials.gov Identifier: NCT03513614., (© 2023. The Author(s).)
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- 2024
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235. Association of Axillary Dissection With Systemic Therapy in Patients With Clinically Node-Positive Breast Cancer.
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Weber WP, Matrai Z, Hayoz S, Tausch C, Henke G, Zimmermann F, Montagna G, Fitzal F, Gnant M, Ruhstaller T, Muenst S, Mueller A, Lelièvre L, Heil J, Knauer M, Egle D, Sávolt Á, Heidinger M, Kurzeder C, Zwahlen DR, Gruber G, Ackerknecht M, Kuemmel S, Bjelic-Radisic V, Smanykó V, Vrieling C, Satler R, Hagen D, Becciolini C, Bucher S, Simonson C, Fehr PM, Gabriel N, Maráz R, Sarlos D, Dedes KJ, Leo C, Berclaz G, Fansa H, Hager C, Reisenberger K, Singer CF, Loibl S, Winkler J, Lam GT, Fehr MK, Kohlik M, Clerc K, Ostapenko V, Maggi N, Schulz A, Andreozzi M, Goldschmidt M, Saccilotto R, and Markellou P
- Subjects
- Humans, Female, Middle Aged, Sentinel Lymph Node Biopsy, Lymphatic Metastasis pathology, Cohort Studies, Prospective Studies, Lymph Node Excision, Lymph Nodes pathology, Neoadjuvant Therapy, Axilla, Breast Neoplasms drug therapy, Breast Neoplasms surgery
- Abstract
Importance: The role of axillary lymph node dissection (ALND) to determine nodal burden to inform systemic therapy recommendations in patients with clinically node (cN)-positive breast cancer (BC) is currently unknown., Objective: To address the association of ALND with systemic therapy in cN-positive BC in the upfront surgery setting and after neoadjuvant chemotherapy (NACT)., Design, Setting, and Participants: This was a prospective, observational, cohort study conducted from August 2018 to June 2022. This was a preplanned study within the phase 3 randomized clinical OPBC-03/TAXIS trial. Included were patients with confirmed cN-positive BC from 44 private, public, and academic breast centers in 6 European countries. After NACT, residual nodal disease was mandatory, and a minimum follow-up of 2 months was required., Exposures: All patients underwent tailored axillary surgery (TAS) followed by ALND or axillary radiotherapy (ART) according to TAXIS randomization. TAS removed suspicious palpable and sentinel nodes, whereas imaging-guidance was optional. Systemic therapy recommendations were at the discretion of the local investigators., Results: A total of 500 patients (median [IQR] age, 57 [48-69] years; 487 female [97.4%]) were included in the study. In the upfront surgery setting, 296 of 335 patients (88.4%) had hormone receptor (HR)-positive and Erb-B2 receptor tyrosine kinase 2 (ERBB2; formerly HER2 or HER2/neu)-negative disease: 145 (49.0%) underwent ART, and 151 (51.0%) underwent ALND. The median (IQR) number of removed positive lymph nodes without ALND was 3 (1-4) nodes compared with 4 (2-9) nodes with ALND. There was no association of ALND with the proportion of patients undergoing adjuvant chemotherapy (81 of 145 [55.9%] vs 91 of 151 [60.3%]; adjusted odds ratio [aOR], 0.72; 95% CI, 0.19-2.67) and type of systemic therapy. Of 151 patients with NACT, 74 (51.0%) underwent ART, and 77 (49.0%) underwent ALND. The ratio of removed to positive nodes was a median (IQR) of 4 (3-7) nodes to 2 (1-3) nodes and 15 (12-19) nodes to 2 (1-5) nodes in the ART and ALND groups, respectively. There was no observed association of ALND with the proportion of patients undergoing postneoadjuvant systemic therapy (57 of 74 [77.0%] vs 55 of 77 [71.4%]; aOR, 0.86; 95% CI, 0.43-1.70), type of postneoadjuvant chemotherapy (eg, capecitabine: 10 of 74 [13.5%] vs 10 of 77 [13.0%]; trastuzumab emtansine-DM1: 9 of 74 [12.2%] vs 11 of 77 [14.3%]), or endocrine therapy (eg, aromatase inhibitors: 41 of 74 [55.4%] vs 36 of 77 [46.8%]; tamoxifen: 8 of 74 [10.8%] vs 6 of 77 [7.8%])., Conclusion: Results of this cohort study suggest that patients without ALND were significantly understaged. However, ALND did not inform systemic therapy recommendations.
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- 2023
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236. Trends in use of neoadjuvant systemic therapy in patients with clinically node-positive breast cancer in Europe: prospective TAXIS study (OPBC-03, SAKK 23/16, IBCSG 57-18, ABCSG-53, GBG 101).
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Tausch C, Däster K, Hayoz S, Matrai Z, Fitzal F, Henke G, Zwahlen DR, Gruber G, Zimmermann F, Andreozzi M, Goldschmidt M, Schulz A, Maggi N, Saccilotto R, Heidinger M, Mueller A, Tampaki EC, Bjelic-Radisic V, Sávolt Á, Smanykó V, Hagen D, Müller DJ, Gnant M, Loibl S, Markellou P, Bekes I, Egle D, Ruhstaller T, Muenst S, Kuemmel S, Vrieling C, Satler R, Becciolini C, Bucher S, Kurzeder C, Simonson C, Fehr PM, Gabriel N, Maráz R, Sarlos D, Dedes KJ, Leo C, Berclaz G, Fansa H, Hager C, Reisenberger K, Singer CF, Montagna G, Reitsamer R, Winkler J, Lam GT, Fehr MK, Naydina T, Kohlik M, Clerc K, Ostapenko V, Lelièvre L, Heil J, Knauer M, and Weber WP
- Subjects
- Humans, Middle Aged, Female, Neoadjuvant Therapy, Prospective Studies, Breast pathology, Europe epidemiology, Receptor, ErbB-2 metabolism, Breast Neoplasms drug therapy, Breast Neoplasms epidemiology, Breast Neoplasms metabolism
- Abstract
Purpose: The aim of this study was to evaluate clinical practice heterogeneity in use of neoadjuvant systemic therapy (NST) for patients with clinically node-positive breast cancer in Europe., Methods: The study was preplanned in the international multicenter phase-III OPBC-03/TAXIS trial (ClinicalTrials.gov Identifier: NCT03513614) to include the first 500 randomized patients with confirmed nodal disease at the time of surgery. The TAXIS study's pragmatic design allowed both the neoadjuvant and adjuvant setting according to the preferences of the local investigators who were encouraged to register eligible patients consecutively., Results: A total of 500 patients were included at 44 breast centers in six European countries from August 2018 to June 2022, 165 (33%) of whom underwent NST. Median age was 57 years (interquartile range [IQR], 48-69). Most patients were postmenopausal (68.4%) with grade 2 and 3 hormonal receptor-positive and human epidermal growth factor receptor 2-negative breast cancer with a median tumor size of 28 mm (IQR 20-40). The use of NST varied significantly across the countries (p < 0.001). Austria (55.2%) and Switzerland (35.8%) had the highest percentage of patients undergoing NST and Hungary (18.2%) the lowest. The administration of NST increased significantly over the years (OR 1.42; p < 0.001) and more than doubled from 20 to 46.7% between 2018 and 2022., Conclusion: Substantial heterogeneity in the use of NST with HR+/HER2-breast cancer exists in Europe. While stringent guidelines are available for its use in triple-negative and HER2+ breast cancer, there is a need for the development of and adherence to well-defined recommendations for HR+/HER2-breast cancer., (© 2023. The Author(s).)
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- 2023
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237. Development of a risk-tailored approach and dashboard for efficient management and monitoring of investigator-initiated trials.
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Klatte K, Subramaniam S, Benkert P, Schulz A, Ehrlich K, Rösler A, Deschodt M, Fabbro T, Pauli-Magnus C, and Briel M
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- Humans, Risk Assessment, Risk Factors, Records, Research Personnel, Patient Safety
- Abstract
Background: Most randomized controlled trials (RCTs) in the academic setting have limited resources for clinical trial management and monitoring. Inefficient conduct of trials was identified as an important source of waste even in well-designed studies. Thoroughly identifying trial-specific risks to enable focussing of monitoring and management efforts on these critical areas during trial conduct may allow for the timely initiation of corrective action and to improve the efficiency of trial conduct. We developed a risk-tailored approach with an initial risk assessment of an individual trial that informs the compilation of monitoring and management procedures in a trial dashboard., Methods: We performed a literature review to identify risk indicators and trial monitoring approaches followed by a contextual analysis involving local, national and international stakeholders. Based on this work we developed a risk-tailored management approach with integrated monitoring for RCTs and including a visualizing trial dashboard. We piloted the approach and refined it in an iterative process based on feedback from stakeholders and performed formal user testing with investigators and staff of two clinical trials., Results: The developed risk assessment comprises four domains (patient safety and rights, overall trial management, intervention management, trial data). An accompanying manual provides rationales and detailed instructions for the risk assessment. We programmed two trial dashboards tailored to one medical and one surgical RCT to manage identified trial risks based on daily exports of accumulating trial data. We made the code for a generic dashboard available on GitHub that can be adapted to individual trials., Conclusions: The presented trial management approach with integrated monitoring enables user-friendly, continuous checking of critical elements of trial conduct to support trial teams in the academic setting. Further work is needed in order to show effectiveness of the dashboard in terms of safe trial conduct and successful completion of clinical trials., (© 2023. The Author(s).)
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- 2023
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238. Comparison of Long-Term Skin Quality and Scar Formation in Partial-Thickness Burn Wounds Treated with Suprathel ® and epicite hydro® Wound Dressings.
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Schiefer JL, Aretz FG, Fuchs PC, Lefering R, Yary P, Opländer C, Schulz A, and Daniels M
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- Humans, Skin Transplantation methods, Quality of Life, Bandages, Pain, Cicatrix etiology, Burns complications, Burns therapy
- Abstract
Background and Objectives : Scar formation after burn trauma has a significant impact on the quality of life of burn patients. Hypertrophic scars or keloids can be very distressing to patients due to potential pain, functional limitations, or hyper- or hypopigmentation. In a previous study comparing Suprathel
® and the new and cheaper dressing epicitehydro® , we were able to show that pain reduction, exudation, and time until wound-healing of partial-thickness burn wounds were similar, without any documented infections. No study exists that objectively measures and compares skin and scar quality after treatment with Suprathel® and epicitehydro® at present. Materials and Methods : In this study, the scar quality of 20 patients who had been treated with Suprathel® and epicitehydro® was objectively assessed using the Cutometer® , Mexameter® , and Tewameter® , as well as subjectively with the Patient and Observer Scar Assessment Scale, 3, 6, and 12 months after burn injury. Results : In all performed measurements, no significant differences were detected in scar formation after treatment of partial-thickness burn wounds with the two dressings. Conclusions : Both the newer and less expensive wound-dressing epicitehydro® and the well-known wound-dressing Suprathel® resulted in stable wound closure and showed good cosmetic results in the follow-up examinations.- Published
- 2022
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239. Comparison of wound healing and patient comfort in partial-thickness burn wounds treated with SUPRATHEL and epicte hydro wound dressings.
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Schiefer JL, Aretz GF, Fuchs PC, Bagheri M, Funk M, Schulz A, and Daniels M
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- Bandages, Cicatrix, Humans, Pain, Patient Comfort, Polyesters, Prospective Studies, Wound Healing, Burns therapy, Soft Tissue Injuries
- Abstract
Among the available dressings for partial-thickness burn wound treatment, SUPRATHEL has shown good usability and effectiveness for wound healing and patient comfort and has been used in many burn centres in the last decade. Recently, bacterial nanocellulose (BNC) has become popular for the treatment of wounds, and many studies have demonstrated its efficacy. epicite
hydro , consisting of BNC and 95% water, is a promising product and has recently been introduced in numerous burn centres. To date, no studies including direct comparisons to existing products like SUPRATHEL have been conducted. Therefore, we aimed to compare epicitehydro to SUPRATHEL in the treatment of partial-thickness burns. Twenty patients with partial-thickness burns affecting more than 0.5% of their total body surface area (TBSA) were enrolled in this prospective, unicentric, open, comparative, intra-individual clinical study. After debridement, the wounds were divided into two areas: one was treated with SUPRATHEL and the other with epicitehydro . Wound healing, infection, bleeding, exudation, dressing changes, and pain were documented. The quality of the scar tissue was assessed subjectively using the Patient and Observer Scar Scale. Wound healing in patients with a mean TBSA of 9.2% took 15 to 16 days for both treatments without dressing changes. All wounds showed minimal exudation, and patients reported decreased pain with the only significant difference between the two dressings on day 1. No infection or bleeding occurred in any of the wounds. Regarding scar evaluation, SUPRATHEL and epicitehydro did not differ significantly. Both wound dressings were easy to use, were highly flexible, created a safe healing environment, had similar effects on pain reduction, and showed good cosmetic and functional results without necessary dressing changes. Therefore, epicitehydro can be used as an alternative to SUPRATHEL for the treatment of partial-thickness burn wounds., (© 2021 The Authors. International Wound Journal published by Medicalhelplines.com Inc (3M) and John Wiley & Sons Ltd.)- Published
- 2022
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240. Sexual Health Screening for Gynecologic and Breast Cancer Survivors: A Review and Critical Analysis of Validated Screening Tools.
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Tounkel I, Nalubola S, Schulz A, and Lakhi N
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Introduction: Studies have shown that the sexual health concerns of gynecologic and breast cancer survivors are not adequately being addressed by clinicians., Aim: To provide a comprehensive narrative review of validated sexual health screening tools and aid clinicians in choosing a screening tool that will allow them to best address their patients' sexual health concerns METHODS: A review of PubMed and Google Scholar databases was conducted, using search terms "sexual health", "screening", "tools", "cancer", and "survivors" to identify sexual health screening tools meeting the following inclusion criteria: 1) published in a peer-reviewed journal, 2) were written in English, 3) included breast and/or gynecological cancer patient population, 4) included self-reported measure of sexual health and function, and 5) underwent psychometric validation., Main Outcome Measure: Criteria used to evaluate identified screening tools included ability to assess desire, arousal, satisfaction, orgasm, dyspareunia, solo sexual expression, relationship with partner, body image, distress over changes in sexual function, and support systems. Pre and post- treatment comparisons, differentiation between lack of sexual desire and inability, heterosexual bias, diversity in patient population, and ease of scoring were also evaluated., Results: Based upon the inclusion criteria, the following 10 sexual health screening tools were identified and reviewed: Female Sexual Function Index, European Organization for Research and Treatment of Cancer Quality of Life Questionnaires for both Cervical and Endometrial Cancer, Sexual Adjustment and Body Image Scale, Sexual Adjustment and Body Image Scale- Gynecologic Cancer, Sexual Function and Vaginal Changes Questionnaire, Gynaecologic Leiden Questionnaire, Information on Sexual Health: Your Needs after Cancer, Sexual Satisfaction Questionnaire, and Sexual Activity Questionnaire. Most tools assessed satisfaction (n=10), desire (n=9), and dyspareunia (n=8). Fewer addressed objective arousal (n=7), body image/femininity (n=7), partner relationship (n=7), orgasm (n=5), pre/post treatment considerations (n=5), distress (n=4), and solo-sexual expression (n=2). Heterosexual bias (n=3) and failure to differentiate between lack of desire and inability (n=2) were encountered., Conclusion: Understanding the strengths and limitations of sexual health screening tools can help clinicians more effectively address cancer survivors' sexual health concerns, which is essential in providing comprehensive care and improving quality of life. Screening tools have room for improvement, such as eliminating heterosexual bias and including cancer and treatment-specific questions. Clinicians can use this guide to select the most appropriate screening tool for their patients and begin bridging the gap in sexual healthcare. Tounkel I, Nalubola S, Schulz A, et al. Sexual Health Screening for Gynecologic and Breast Cancer Survivors: A Review and Critical Analysis of Validated Screening Tools. Sex Med 2022;10:100498., (Copyright © 2022 International Society for Sexual Medicine. Published by Elsevier Inc. All rights reserved.)
- Published
- 2022
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241. Tailored axillary surgery in patients with clinically node-positive breast cancer: Pre-planned feasibility substudy of TAXIS (OPBC-03, SAKK 23/16, IBCSG 57-18, ABCSG-53, GBG 101).
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Weber WP, Matrai Z, Hayoz S, Tausch C, Henke G, Zwahlen DR, Gruber G, Zimmermann F, Seiler S, Maddox C, Ruhstaller T, Muenst S, Ackerknecht M, Kuemmel S, Bjelic-Radisic V, Kurzeder C, Újhelyi M, Vrieling C, Satler R, Meyer I, Becciolini C, Bucher S, Simonson C, Fehr PM, Gabriel N, Maráz R, Sarlos D, Dedes KJ, Leo C, Berclaz G, Dubsky P, Exner R, Fansa H, Hager C, Reisenberger K, Singer CF, Reitsamer R, Reinisch M, Winkler J, Lam GT, Fehr MK, Naydina T, Kohlik M, Clerc K, Ostapenko V, Fitzal F, Nussbaumer R, Maggi N, Schulz A, Markellou P, Lelièvre L, Egle D, Heil J, and Knauer M
- Subjects
- Axilla pathology, Feasibility Studies, Female, Humans, Lymph Node Excision, Lymph Nodes pathology, Lymph Nodes surgery, Neoplasm Staging, Prospective Studies, Sentinel Lymph Node Biopsy, Breast Neoplasms drug therapy, Breast Neoplasms pathology, Breast Neoplasms surgery
- Abstract
Aim: We developed tailored axillary surgery (TAS) to reduce the axillary tumor volume in patients with clinically node-positive breast cancer to the point where radiotherapy can control it. The aim of this study was to quantify the extent of tumor load reduction achieved by TAS., Methods: International multicenter prospective study embedded in a randomized trial. TAS is a novel pragmatic concept for axillary surgery de-escalation that combines palpation-guided removal of suspicious nodes with the sentinel procedure and, optionally, imaging-guided localization. Pre-specified study endpoints quantified surgical extent and reduction of tumor load., Results: A total of 296 patients were included at 28 sites in four European countries, 125 (42.2%) of whom underwent neoadjuvant chemotherapy (NACT) and 71 (24.0%) achieved nodal pathologic complete response. Axillary metastases were detectable only by imaging in 145 (49.0%) patients. They were palpable in 151 (51.0%) patients, of whom 63 underwent NACT and 21 had residual palpable disease after NACT. TAS removed the biopsied and clipped node in 279 (94.3%) patients. In 225 patients with nodal disease at the time of surgery, TAS removed a median of five (IQR 3-7) nodes, two (IQR 1-4) of which were positive. Of these 225 patients, 100 underwent ALND after TAS, which removed a median of 14 (IQR 10-17) additional nodes and revealed additional positive nodes in 70/100 (70%) of patients. False-negative rate of TAS in patients who underwent subsequent ALND was 2.6%., Conclusions: TAS selectively reduced the tumor load in the axilla and remained much less radical than ALND., Competing Interests: Declaration of interest statement Outside the submitted work, W.P. Weber received research support from Takeda Pharmaceuticals International paid to the Swiss Group for Clinical Cancer Research (SAKK) and personal honoraria from Genomic Health, Inc., USA. Support for meetings was paid to his institution from Sandoz, Genomic Health, Medtronic, Novartis Oncology, Pfizer and Eli Lilly. Hisham Fansa has no financial interest, and receives royalty payments from Springer-Nature publishers for two textbooks on breast surgery. Florian Fitzal was editor of Oncoplastic Surgery part I and II (SPRINGER), received travel support and scientific support from COMESA (Mentor), NOVARTIS, ROCHE, ASTRA ZENECA, PFIZER, MYRIAD, NANOSTRING, BONDIMED (Polytech, Integra), Lilly, had an advisory role for PFIZER, ASTRA ZENECA, LILLY, ROCHE, and was founder of BREAST ANALYZING TOOL (BAT; breastanalyzing.com). All other authors declare no competing interests relevant to this manuscript., (Copyright © 2021 The Authors. Published by Elsevier Ltd.. All rights reserved.)
- Published
- 2021
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242. Identifying Distinguishable Clinical Profiles Between Single Suicide Attempters and Re-Attempters.
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Lübbert M, Bahlmann L, Josfeld S, Bürger J, Schulz A, Bär KJ, Polzer U, Walter M, Kastner UW, Sobanski T, and Wagner G
- Abstract
More than 800,000 individuals die from suicide each year in the world, which has a devastating impact on families and society. Ten to twenty times more attempt suicide. Previous studies showed that suicide attempters represent a heterogeneous group regarding demographic characteristics, individual characteristics of a suicidal attempt, and the assumed clinical factors, e.g., hopelessness or impulsivity, thus differently contributing to the likelihood of suicidal behavior. Therefore, in the present study, we aim to give a comprehensive clinical description of patients with repeated suicide attempts compared to single attempters. We explored putative differences between groups in clinical variables and personality traits, sociodemographic information, and specific suicide attempt-related information. A sample of patients with a recent suicide attempt ( n = 252), defined according to DSM-5 criteria for a suicidal behavior disorder (SBD), was recruited in four psychiatric hospitals in Thuringia, Germany. We used a structured clinical interview to assess the psychiatric diagnosis, sociodemographic data, and to collect information regarding the characteristics of the suicide attempt. Several clinical questionnaires were used to measure the suicide intent and suicidal ideations, depression severity, hopelessness, impulsivity, aggression, anger expression, and the presence of childhood trauma. Univariate and multivariate statistical methods were applied to evaluate the postulated risk factors and, to distinguish groups based on these measures. The performed statistical analyses indicated that suicide attempters represent a relatively heterogeneous group, nevertheless associated with specific clinical profiles. We demonstrated that the re-attempters had more severe psychopathology with significantly higher levels of self-reported depression, suicidal ideation as well as hopelessness. Furthermore, re-attempters had more often first-degree relatives with suicidal behavior and emotional abuse during childhood. They also exhibited a higher degree of specific personality traits, i.e., more "urgency" as a reaction to negative emotions, higher excitability, higher self-aggressiveness, and trait anger. The multivariate discriminant analysis significantly discriminated the re-attempters from single attempters by higher levels of self-aggressiveness and suicidal ideation. The findings might contribute to a better understanding of the complex mechanisms leading to suicidal behavior, which might improve the early identification and specific treatment of subjects at risk for repeated suicidal behavior., Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (Copyright © 2021 Lübbert, Bahlmann, Josfeld, Bürger, Schulz, Bär, Polzer, Walter, Kastner, Sobanski and Wagner.)
- Published
- 2021
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243. Prepectoral versus subpectoral implant-based breast reconstruction after skin-sparing mastectomy or nipple-sparing mastectomy (OPBC-02/ PREPEC): a pragmatic, multicentre, randomised, superiority trial.
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Kappos EA, Schulz A, Regan MM, Moffa G, Harder Y, Ribi K, Potter S, Pusic AL, Fehr MK, Hemkens LG, Holzbach T, Farhadi J, Simonson C, Knauer M, Verstappen R, Bucher HC, Zwahlen D, Zimmermann F, Schwenkglenks M, Mucklow R, Shaw J, Bjelic-Radisic V, Chiorescu A, Chun YS, Farah S, Xiaosong C, Nigard L, Kuemmel S, Reitsamer R, Hauschild M, Fulco I, Tausch C, Fischer T, Sarlos D, Constantinescu MA, Lupatsch JE, Fitzal F, Heil J, Matrai Z, de Boniface J, Kurzeder C, Haug M, and Weber WP
- Subjects
- Female, Humans, Mastectomy, Nipples surgery, Breast Implantation, Breast Implants, Breast Neoplasms surgery, Mammaplasty
- Abstract
Introduction: The emphasis on aesthetic outcomes and quality of life (QoL) has motivated surgeons to develop skin-sparing or nipple-sparing mastectomy (SSM/ NSM) for breast cancer treatment or prevention. During the same operation, a so-called immediate breast reconstruction is performed. The breast can be reconstructed by positioning of a breast implant above (prepectoral) or below (subpectoral) the pectoralis major muscle or by using the patients' own tissue (autologous reconstruction). The optimal positioning of the implant prepectoral or subpectoral is currently not clear. Subpectoral implant-based breast reconstruction (IBBR) is still standard care in many countries, but prepectoral IBBR is increasingly performed. This heterogeneity in breast reconstruction practice is calling for randomised clinical trials (RCTs) to guide treatment decisions., Methods and Analysis: International, pragmatic, multicentre, randomised, superiority trial. The primary objective of this trial is to test whether prepectoral IBBR provides better QoL with respect to long-term (24 months) physical well-being (chest) compared with subpectoral IBBR for patients undergoing SSM or NSM for prevention or treatment of breast cancer. Secondary objectives will compare prepectoral versus subpectoral IBBR in terms of safety, QoL and patient satisfaction, aesthetic outcomes and burden on patients. Total number of patients to be included: 372 (186 per arm)., Ethics and Dissemination: This study will be conducted in compliance with the Declaration of Helsinki. Ethical approval has been obtained for the lead investigator's site by the Ethics Committee 'Ethikkommission Nordwest- und Zentralschweiz' (2020-00256, 26 March 2020). The results of this study will be published in a peer-reviewed medical journal, independent of the results, following the Consolidated Standards of Reporting Trials standards for RCTs and good publication practice. Metadata describing the type, size and content of the datasets will be shared along with the study protocol and case report forms on public repositories adhering to the FAIR (Findability, Accessibility, Interoperability, and Reuse) principles., Trial Registration Number: NCT04293146., Competing Interests: Competing interests: None declared., (© Author(s) (or their employer(s)) 2021. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.)
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- 2021
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244. Feasibility of Pure Silk for the Treatment of Large Superficial Burn Wounds Covering Over 10% of the Total Body Surface.
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Schiefer JL, Daniels M, Grigutsch D, Fuchs PC, and Schulz A
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- Adult, Aged, Aged, 80 and over, Burns complications, Burns pathology, Cicatrix etiology, Cicatrix pathology, Cicatrix prevention & control, Feasibility Studies, Female, Germany, Humans, Male, Middle Aged, Patient Satisfaction, Retrospective Studies, Treatment Outcome, Wound Healing, Young Adult, Bandages, Burns therapy, Silk therapeutic use
- Abstract
Large, superficial burn wounds require many painful dressing changes and, thus, dressings that can stay on the wound and peel off during re-epithelization such as Biobrane® and Suprathel® are preferred, but they are costly. Natural silk has shown good outcomes with respect to wound healing, scarring, and patient satisfaction. This study aimed to evaluate the efficacy of natural silk compared with that of initially used dressings for the treatment of superficial burn wounds greater than 10% of the TBSA. Patients with superficial burns covering >10% of the TBSA were treated with pure silk for the first time (treatment group). Complications during wound healing with respect to the need for further surgery and scarring were compared with those of patients with similar burns of more than 10% TBSA and treated with nylon mesh and collagen instead of silk (treatment group). The treatment and control group comprised 25 and 13 patients, respectively. In total, 88% of patients in the treatment group did not require further treatment, while two patients with chemical burns needed further surgeries. Moreover, patients reported high satisfaction with respect to scarring and aesthetic outcome. Meanwhile, 85% of patients in the control group healed without further surgery and showed higher median hypopigmentation and hyperpigmentation after 12 months. Silk is an effective wound dressing for the treatment of large superficial burn wounds. It avoids painful dressing changes and yields satisfactory aesthetic outcomes. However, especially in large burns, careful initial wound depth assessment is crucial to prevent infection and reoperations., (© American Burn Association 2019. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.)
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- 2020
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245. Treatment of Genital Burn Injuries: Traditional Procedures and New Techniques.
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Schulz A, Ribitsch B, Fuchs PC, Lipensky A, and Schiefer JL
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- Bromelains administration & dosage, Burns surgery, Female, Humans, Male, Wound Healing, Burns therapy, Debridement methods, Genitalia, Female injuries, Genitalia, Male injuries, Perineum injuries, Skin Transplantation methods
- Abstract
Objective: Because genital burns are rare, only limited information on treatment guidelines is available in the literature. Vital tissue should be preserved to promote spontaneous healing because reconstruction does not always lead to satisfying results. The aim of this report is to present a general overview of current, prevailing treatment for genital burns and compare this to study authors' experiences. In addition, the article describes an entirely new approach of tissue-preserving bromelain-based enzymatic debridement of genital burn wounds., Methods: This single-center study includes all patients who were treated for severe genital and perineal burn wounds at a burn intensive care unit between December 1995 and December 2016. A review of literature was performed in PubMed covering the years 1990 to 2016., Results: A total of 149 patients were admitted with severe burns or scalding of the genitals or the perineum. As in the majority of cases reported in the current literature, most of these patients were treated conservatively. When there was demarcation of necrotic tissue, tangential excision and skin grafting were performed, and since 2015, 3 patients admitted to this facility have been treated with bromelain-based debridement followed by spontaneous healing. Certain small-scale studies in the literature describe a disproportionate number of surgical interventions., Conclusions: Based on this evidence, study authors support a conservative view of genital burn treatment. Enzymatic debridement allows earlier and more selective debridement, which can improve the aesthetic outcome.
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- 2018
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246. Effect of Bromelain-Based Enzymatic Debridement on Skin Cells.
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Schulz A, Fuchs PC, Oplaender C, Valdez LB, and Schiefer JL
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- Cell Survival drug effects, Fibroblasts drug effects, Humans, In Vitro Techniques, Keratinocytes drug effects, Macrophages drug effects, Bromelains therapeutic use, Burns therapy, Debridement methods, Skin drug effects
- Abstract
Several reports have concluded that enzymatic debridement based on Bromelain (NX) is selective and efficient. Although clinical trials showed that viable tissue is not damaged at the macroscopic level, the effect on the cellular level is largely unknown. The current study is meant to close this gap by evaluating whether NX has an effect on vital cells of the human dermis on a cellular level. In an experimental in vitro study design, the effect of NX on human keratinocytes, fibroblasts, and macrophages was analyzed. Enzymatic treatment was performed for 4 hours by using either cell culture medium or phosphate-buffered saline as diluting agent for NX. Cell viability and relative cell number in relation to untreated control cells were determined using a resazurin-based assay. In addition, the development of enzyme activity during clinical treatment was analyzed: wound fluid collected from a burn wound at different points of debridement was applied on collagen-elastin disks to prove enzymatic digestion activity. Both keratinocytes and fibroblasts were damaged by NX even at low concentrations. Both cell types showed improved survival when a medium was used for dissolving NX. Macrophages appeared to resist NX treatment more efficiently than the other cell types. In the clinical trial, NX activity in the wound fluid decreased clearly following 4 hours of enzymatic debridement. NX induces toxicity of vital skin cells in vitro. However, macrophages appear to be more resistant against NX treatment in vitro. The inflammatory responses of vital cells in the burn wound itself are likely to inhibit NX activity. The effect of this inflammatory process on NX activity will have to be investigated in future studies.
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- 2018
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247. Inhibition of Bromelain Activity During Enzymatic Debridement of Burn Wounds Pretreated With Frequently Used Products.
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Schulz A, Fuchs PC, Hans N, Opländer C, Valdez LB, and Schiefer JL
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- Anti-Infective Agents, Local therapeutic use, Betaine analogs & derivatives, Betaine chemistry, Betaine therapeutic use, Biguanides chemistry, Biguanides therapeutic use, Bromelains therapeutic use, Collagen chemistry, Collagen therapeutic use, Elastin chemistry, Elastin therapeutic use, Ethanolamines chemistry, Ethanolamines therapeutic use, Imines, Pyridines chemistry, Pyridines therapeutic use, Skin, Artificial, Undecylenic Acids chemistry, Undecylenic Acids therapeutic use, Anti-Infective Agents, Local chemistry, Bromelains chemistry, Burns therapy, Debridement methods
- Abstract
An enzyme mixture containing bromelain (NexoBrid®) was found to be suitable for enzymatic debridement of burn wounds, as determined by the criteria of patient comfort and pain, selectivity, and efficiency. Nevertheless, daily experience showed that pretreatment of burn wounds with several other clinical agents may inhibit debridement efficiency. Therefore, the current study was performed to identify those agents and evaluate their debridement inhibition capabilities. The impact of several common agents as well pH, on NexoBrid® debridement efficiency was evaluated in vitro. A collagen-based dermal substitute (MatriDerm®) was exposed to NexoBrid® in the presence of different agents of varying concentrations. Digestion was documented. The criteria used for judging digestion were independently classified by 3 investigators at least 3 times in succession. When a low concentration (1.0 mg/ml) of NexoBrid® was used, a ≥ 50% concentration of Prontosan® had an impact on enzymatic activity. Comparable results were obtained when even lower concentrations of Octenisept® (≥ 10%) were used. A 100-µmol/L concentration of copper inhibited the enzymatic activity of both a low (1.0 mg/ml) and high (10 mg/ml) concentration of NexoBrid®. Silver-sulfadiazine at concentrations of 10% and 90% inhibited the activity of 1 mg/ml NexoBrid®. No complete inhibition of NexoBrid® activity occurred at any concentration of iron. We recommend using polyhexanide-containing agents (Prontosan®) to rinse and presoak burn wounds. Pretreatment of burn wounds with agents containing silver and copper should be avoided. Experimentally, we found a partial inhibition of NexoBrid® activity at the distinct pH values of 3 and 11.
- Published
- 2018
- Full Text
- View/download PDF
248. Children exhibit different performance patterns in explicit and implicit theory of mind tasks.
- Author
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Oktay-Gür N, Schulz A, and Rakoczy H
- Subjects
- Age Factors, Child, Child, Preschool, Female, Humans, Male, Child Development physiology, Social Perception, Theory of Mind physiology, Thinking physiology
- Abstract
Three studies tested scope and limits of children's implicit and explicit theory of mind. In Studies 1 and 2, three- to six-year-olds (N = 84) were presented with closely matched explicit false belief tasks that differed in whether or not they required an understanding of aspectuality. Results revealed that children performed equally well in the different tasks, and performance was strongly correlated. Study 3 tested two-year-olds (N = 81) in implicit interactive versions of these tasks and found evidence for dis-unity: children performed competently only in those tasks that did not require an understanding of aspectuality. Taken together, the present findings suggest that early implicit and later explicit theory of mind tasks may tap different forms of cognitive capacities., (Copyright © 2018 Elsevier B.V. All rights reserved.)
- Published
- 2018
- Full Text
- View/download PDF
249. Long-term Scar Quality after Treatment of Standardized Partial-Thickness Skin Graft Donor Sites.
- Author
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Schulz A, Rothermund I, Lefering R, Fuchs PC, and Schiefer J
- Subjects
- Adult, Biological Dressings, Burns complications, Cicatrix etiology, Cohort Studies, Esthetics, Female, Humans, Injury Severity Score, Male, Middle Aged, Retrospective Studies, Risk Assessment, Skin Transplantation adverse effects, Treatment Outcome, Wound Healing physiology, Burns surgery, Cicatrix prevention & control, Coated Materials, Biocompatible therapeutic use, Silk therapeutic use, Skin Transplantation methods
- Abstract
Background: The long-term aesthetic appearance of scars is of great importance to patients. Biobrane (Smith and Nephew, Fort Worth, Texas), a biosynthetic skin dressing, is a successfully established dressing for the treatment of superficial wounds. A new silk barrier dressing (Dressilk; Prevor, Moulin de Verville, France) has also shown good results in wound healing. This study evaluated the long-term scar quality of superficial wounds treated with these dressings., Methods: From February 2012 to May 2013, 11 patients with burns in need of skin grafting received donor site treatment. Study authors dressed 2 adjacent, standardized, partial-thickness skin graft donor sites on each participant with Biobrane or Dressilk. Scar formation on both treated areas was compared 24 months after initial application using subjective and objective assessment methods., Results: Independent of treatment, the majority of the patients described scar quality similar to normal skin using subjective and objective evaluation tools. However, for scar perfusion, significantly lower oxygen saturation was shown in both treated areas compared with untreated skin., Conclusions: Comparatively, the 2 wound dressings showed similar results, making silk dressings an interesting alternative to biosynthetic ones.
- Published
- 2018
- Full Text
- View/download PDF
250. Enzymatic debridement of deeply burned faces: Healing and early scarring based on tissue preservation compared to traditional surgical debridement.
- Author
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Schulz A, Fuchs PC, Rothermundt I, Hoffmann A, Rosenberg L, Shoham Y, Oberländer H, and Schiefer J
- Subjects
- Adolescent, Adult, Aged, Dermis, Female, Humans, Male, Middle Aged, Organ Sparing Treatments, Skin Transplantation statistics & numerical data, Wound Healing, Young Adult, Bromelains therapeutic use, Burns therapy, Cicatrix, Debridement methods, Facial Injuries therapy, Re-Epithelialization
- Abstract
Introduction: Facial burns occur frequently and depending on the injured skin layers often heal with scars which may cause permanent functional and cosmetic sequelae. Preservation of the sensitive facial skin layers, especially of the dermis is essential for scarless epithelialisation. Enzymatic debridement of deep thermal burns has already been shown to assist with preserving viable dermis. However, up to date, there are no published reports on wound healing and in the long term aesthetic outcome after enzymatic debridement of facial burns., Methods: Therefore we performed a-single centre clinical trial that included 26 subjects aged 18-78 years with facial burns clinically evaluated as deep dermal or deeper. Burns were treated either with enzymatic debridement or excisional surgical debridement. Then we compared both groups regarding debridement selectivity, wound closure and scar quality after more than 12 months., Results: Enzymatic debridement significantly reduced time to complete wound closure after admission (19.85 days versus 42.23 days, p=0.002), and after enzymatic eschar removal (18.92 days versus 35.62 days, p=0.042). The number of procedures to complete debridement were significantly lower in the enzymatic debridement group (1.00 versus 1.77, p=0.003). 77% of facial burns that had been debrided enzymatically were found to be more superficially burned than initially estimated. Wounds undergoing autografting of any size were significantly reduced by enzymatic debridement (15% versus 77%, p=0.002). Scar quality after enzymatic debridement was superior compared to surgical debridement after 12 months regarding pigmentation (p=0.016), thickness (p=0.16), relief (p=0.10), pliability (p=0.01), surface area (p=0.004), stiffness (p=0.023), thickness (0.011) and scar irregularity (p=0.011). Regarding erythema and melanin, viscoelasticity and pliability, trans-epidermal water loss or laser tissue oxygen saturation, haemoglobin level and microcirculation we found no significant differences for treated and untreated skin in the EDNX group., Conclusion: In our current study we found Bromelain based enzymatic debridement better in some aspects of tissue preservation in deep dermal facial burn., (Copyright © 2017 Elsevier Ltd and ISBI. All rights reserved.)
- Published
- 2017
- Full Text
- View/download PDF
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