90 results on '"Ostermann, S."'
Search Results
2. Are enhanced recovery programs in colorectal surgery feasible and useful in the elderly? A systematic review of the literature
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Launay-Savary, M.-V., Mathonnet, M., Theissen, A., Ostermann, S., Raynaud-Simon, A., and Slim, K.
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- 2017
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3. Comment implémenter un programme de réhabilitation améliorée après chirurgie ? Propositions du Groupe francophone de réhabilitation améliorée après chirurgie (GRACE)
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Slim, K., Delaunay, L., Joris, J., Léonard, D., Raspado, O., Chambrier, C., and Ostermann, S.
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- 2016
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4. How to implement an enhanced recovery program? Proposals from the Francophone Group for enhanced recovery after surgery (GRACE)
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Slim, K., Delaunay, L., Joris, J., Léonard, D., Raspado, O., Chambrier, C., and Ostermann, S.
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- 2016
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5. Randomized clinical trial of laparoendoscopic single-site versus conventional laparoscopic cholecystectomy
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Bucher, P., Pugin, F., Buchs, N. C., Ostermann, S., and Morel, P.
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- 2011
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6. Das epidurale Hämatom mit sekundärer Mittelohrbeteiligung Eine seltene Differentialdiagnose des otogenen Hirnabszesses: Eine seltene Differentialdiagnose des otogenen Hirnabszesses
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Ostermann, S. and Schmäl, F.
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- 1998
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7. Two New Distributional Records of Gliding Squirrels in Merapoh Forest Complex, Pahang.
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Arifuddin, M N, Ostermann, S, Yazid, H, Normazzaliana, I, Amira, N J, Mukri, I, Elly, R, Marieanne, C L, Appalasamy, S, Abdullah, M T, and Jayaraj, V K
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- 2021
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8. Incidence and Risk Factors for Severity of Postoperative Ileus After Colorectal Surgery: A Prospective Registry Data Analysis.
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Venara, A., Meillat, H., Cotte, E., Ouaissi, M., Duchalais, E., Mor-Martinez, C., Wolthuis, A., Regimbeau, J. M., Ostermann, S., Hamel, J. F., Joris, J., Slim, K., the GRACE Collaborative Group For Ileus Study, Chapuis, O, Guignard, B, Saint Denis, M, Sirieix, D, Arimont, JM, Figuet, S, and Milou, F
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PROCTOLOGY ,BOWEL obstructions ,DATA analysis ,RETENTION of urine ,MULTIVARIATE analysis - Abstract
Background: Defining severe postoperative ileus in terms of consequences could help physicians standardize the management of this condition. The recently described classification based on consequences requires further investigation. The aim of this study was to obtain a snapshot of postoperative ileus in patients undergoing colorectal surgery within enhanced recovery programs and to identify factors associated with non-severe and severe postoperative ileus. Methods: This prospective registry data analysis was conducted in 40 centers in five different countries. A total of 786 patients scheduled for colorectal surgery within enhanced recovery programs were included. The primary endpoint was the incidence rate of postoperative ileus as defined by Vather et al. Results: A total of 121 patients experienced postoperative ileus (15.4%). Non-severe POI occurred in 48 patients (6.1%), and severe postoperative ileus occurred in 73 patients (9.3%). In multivariate analysis, the male gender and intra-abdominal complications were associated with severe postoperative ileus: odd ratio (OR) = 2.03 [95% confidence interval (CI) 1.14–3.59], p = 0.01 and OR = 3.60 [95% CI 1.75–7.40], p < 0.0001, respectively. Conversely, open laparotomy and urinary retention were associated with non-severe POI: OR = 3.03 [95% CI 1.37–6.72], p = 0.006 and OR = 2.70 [95% CI 0.89–8.23], p = 0.08, respectively. Conclusions: Postoperative ileus occurred in 15% of patients after colorectal surgery within enhanced recovery programs. For 60% of patients, this was considered severe. The physiopathology of these two entities could be different, severe POI being linked to intraabdominal complication, while non-severe POI being linked with risk factors for "primary" POI. The physician should pay attention to male patients having POI after colorectal surgery and look for features evocating intraabdominal complications. [ABSTRACT FROM AUTHOR]
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- 2020
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9. Bacterial outer membrane vesicles of Aeromonas salmonicida induce a proinflammatory immune response in vitro and in vivo
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Ostermann, S., Kroniger, T., and Köllner, B.
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- 2019
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10. Probing and characterizing the growth of a crystal of ultracold bosons and light.
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Ostermann, S., Piazza, F., and Ritsch, H
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BOSONS , *LASER beams , *CRYSTALLIZATION , *CRYSTAL growth , *SEPARATION (Technology) - Abstract
The non-linear coupled particle light dynamics of an ultracold gas in the field of two independent counter-propagating laser beams can lead to the dynamical formation of a self-ordered lattice structure as presented in (2016) Phys. Rev.X 6 021026. Here we present new numerical studies on experimentally observable signatures to monitor the growth and properties of such a crystal in real time. While, at least theoretically, optimal non-destructive observation of the growth dynamics and the hallmarks of the crystalline phase can be performed by analyzing scattered light, monitoring the evolution of the particle’s momentum distribution via time-of-flight probing is an experimentally more accessible choice. In this work we show that both approaches allow us to unambiguously distinguish the crystal from independent collective scattering as it occurs in matter wave superradiance. As a clear crystallization signature, we identify spatial locking between the two emerging standing laser waves, together creating the crystal potential. For sufficiently large systems, the system allows reversible adiabatic ramping into the crystalline phase as an alternative to a quench across the phase transition and growth from fluctuations. [ABSTRACT FROM AUTHOR]
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- 2017
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11. Experiences with distributed computing for meteorological applications: grid computing and cloud computing.
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Oesterle, F., Ostermann, S., Prodan, R., and Mayr, G. J.
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GRID computing , *CLOUD computing , *METEOROLOGICAL research , *ATMOSPHERIC models , *ATMOSPHERIC research - Abstract
Experiences with three practical meteorological applications with different characteristics are used to highlight the core computer science aspects and applicability of distributed computing to meteorology. Through presenting cloud and grid computing this paper shows use case scenarios fitting a wide range of meteorological applications from operational to research studies. The paper concludes that distributed computing complements and extends existing high performance computing concepts and allows for simple, powerful and cost-effective access to computing capacity. [ABSTRACT FROM AUTHOR]
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- 2015
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12. Experiences with distributed computing for meteorological applications: Grid computing and Cloud computing.
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Schüller, F., Ostermann, S., Prodan, R., and Mayr, G. J.
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DISTRIBUTED sensors , *SENSOR arrays , *MULTIUSER computer systems , *DISTRIBUTED computing , *BOTNETS - Abstract
Experiences with three practical meteorological applications with different characteristics are used to highlight the core computer science aspects and applicability of distributed computing to meteorology. Presenting Cloud and Grid computing this paper shows use case scenarios fitting a wide range of meteorological applications from operational to research studies. The paper concludes that distributed computing complements and extends existing high performance computing concepts and allows for simple, powerful and cost effective access to computing capacity. [ABSTRACT FROM AUTHOR]
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- 2015
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13. Scattering approach to two-colour light forces and self-ordering of polarizable particles.
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Ostermann, S, Sonnleitner, M, and Ritsch, H
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LIGHT scattering , *PARTICLES , *OPTICAL polarization , *TRANSFER matrix , *GEOMETRY , *NANOFIBERS , *GAUSSIAN beams - Abstract
Collective coherent scattering of laser light by an ensemble of polarizable point particles creates long-range interactions, whose properties can be tailored by the choice of injected laser powers, frequencies, and polarizations. We use a transfer matrix approach to study the forces induced by non-interfering fields of orthogonal polarization or different frequencies in a 1D geometry, and find long-range self-ordering of particles without a prescribed order. Adjusting the laser frequencies and powers allows one to tune the inter-particle distances and provides a wide range of possible dynamical couplings not accessible in usual standing wave geometries with prescribed order. In this work, we restrict the examples to two frequencies and polarizations, but the framework also allows one to treat multicolour light beams with random phases. These dynamical effects should be observable in existing experimental setups with effective 1D geometries, such as atoms or nanoparticles coupled to the field of an optical nanofibre or transversely trapped in counter-propagating Gaussian beams. [ABSTRACT FROM AUTHOR]
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- 2014
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14. Que savons-nous de la chirurgie colorectale des Seniors en 2010 ? (282)
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Ostermann, S., Bucher, P., and Morel, P.
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- 2010
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15. Comparaison prospective de la cholécystectomie par abord unique (LESS) et par laparoscopie conventionnelle (57)
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Bucher, P., Pugin, F., Ostermann, S., Bernardi, F., and Morel, P.
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- 2010
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16. P53 What about senior colorectal surgery with modern perioperative standard care in 2009?
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Ostermann, S., Bucher, P., Gervaz, P., and Morel, P.
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- 2009
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17. Correction to: Incidence and Risk Factors for Severity of Postoperative Ileus After Colorectal Surgery: A Prospective Registry Data Analysis.
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Venara, A., Meillat, H., Cotte, E., Ouaissi, M., Duchalais, E., Mor-Martinez, C., Wolthuis, A., Regimbeau, J. M., Ostermann, S., Hamel, J. F., Joris, J., Slim, K., the GRACE Collaborative Group For Ileus Study, Chapuis, O, Guignard, B, Saint Denis, M, Sirieix, D, Arimont, JM, Figuet, S, and Milou, F
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PROCTOLOGY ,DATA analysis ,BOWEL obstructions ,PERSONAL names ,RISK - Abstract
In the list of participating investigators that appears in Acknowledgements, one of the investigators names appears incorrectly. [ABSTRACT FROM AUTHOR]
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- 2020
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18. Supersolid Properties of a Bose-Einstein Condensate in a Ring Resonator.
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Schuster, S. C., Wolf, P., Ostermann, S., Slama, S., and Zimmermann, C.
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BOSE-Einstein condensation , *RESONATORS , *PHASE diagrams , *SUPERFLUIDITY , *PHASE transitions , *FORECASTING - Abstract
We investigate the dynamics of a Bose-Einstein condensate interacting with two noninterfering and counterpropagating modes of a ring resonator. Superfluid, supersolid, and dynamic phases are identified experimentally and theoretically. The supersolid phase is obtained for sufficiently equal pump strengths for the two modes. In this regime we observe the emergence of a steady state with crystalline order, which spontaneously breaks the continuous translational symmetry of the system. The supersolidity of this state is demonstrated by the conservation of global phase coherence at the superfluid to supersolid phase transition. Above a critical pump asymmetry the system evolves into a dynamic runaway instability commonly known as collective atomic recoil lasing. We present a phase diagram and characterize the individual phases by comparing theoretical predictions with experimental observations. [ABSTRACT FROM AUTHOR]
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- 2020
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19. Investigating cycle shifts in women's clothing style and grooming.
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Stern J, Ostermann S, and Penke L
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- Humans, Female, Animals, Grooming, Luteinizing Hormone, Clothing, Menstrual Cycle, Ovulation
- Abstract
In contrast to some non-human primate species, human females do not show overt cues to fertility. Previous research argued that women still show systematic changes in their appearance across their ovulatory cycle to enhance their mating success when fertile. We report five studies investigating whether women's clothing style and grooming behaviour change across the ovulatory cycle. All studies were large (with N = 157 in Study 1, N = 109 in Study 2, N = 257 in Studies 3-5), longitudinal studies with four testing sessions per participant. They involved salivary hormone samples and luteinizing hormone tests to validate conception risk estimates. Across all studies, our results suggest no compelling evidence for cycle shifts in clothing style and grooming. Rather, two studies suggest effects in the opposite direction as hypothesized, as women wore more skin-revealing clothes when non-fertile. One study suggests small effects of wearing necklaces more and eyeglasses less often when fertile. However, these effects were not robust across all studies. Our results are in line with other recent null replications and suggest that, if existent, cues to fertility might be even more subtle than previously assumed. We discuss the need for testing competing theories that explain the evolution of concealed ovulation., (© 2023 The Authors. British Journal of Social Psychology published by John Wiley & Sons Ltd on behalf of British Psychological Society.)
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- 2024
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20. Variations in Rainbow Trout Immune Responses against A. salmonicida : Evidence of an Internal Seasonal Clock in Oncorhynchus mykiss .
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Montero R, Chan JTH, Müller C, Just PN, Ostermann S, Øverland M, Maisey K, Korytář T, and Köllner B
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In poikilothermic vertebrates, seasonality influences different immunological parameters such as leukocyte numbers, phagocytic activity, and antibody titers. This phenomenon has been described in different teleost species, with immunological parameters peaking during warmer months and decreased levels during winter. In this study, the cellular immune responses of rainbow trout (Oncorhynchus mykiss) kept under constant photoperiod and water temperature against intraperitoneally injected Aeromonas salmonicida during the summer and winter were investigated. The kinetics of different leukocyte subpopulations from peritoneal cavity, spleen, and head kidney in response to the bacteria was measured by flow cytometry. Furthermore, the kinetics of induced A. salmonicida -specific antibodies was evaluated by ELISA. Despite maintaining the photoperiod and water temperature as constant, different cell baselines were detected in all organs analyzed. During the winter months, B- and T-cell responses were decreased, contrary to what was observed during summer months. However, the specific antibody titers were similar between the two seasons. Natural antibodies, however, were greatly increased 12 h post-injection only during the wintertime. Altogether, our results suggest a bias toward innate immune responses and potential lymphoid immunosuppression in the wintertime in trout. These seasonal differences, despite photoperiod and water temperature being kept constant, suggest an internal inter-seasonal or circannual clock controlling the immune system and physiology of this teleost fish.
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- 2022
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21. Stretching and relaxing the plantar fascia may change plantar fascia thickness but not pressure pain thresholds: a cross-sectional study of patients with plantar fasciopathy.
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Ostermann S, Olesen JL, Holden S, and Riel H
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- Cross-Sectional Studies, Fascia diagnostic imaging, Foot diagnostic imaging, Humans, Ultrasonography, Fasciitis, Plantar diagnostic imaging, Pain Threshold
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Background: Despite the established relevance of ultrasonography and assessment of pressure pain thresholds in patients with plantar fasciopathy, patient and probe positioning has been mostly ignored and are not necessarily reported in research. The primary aim of this study was to compare plantar fascia thickness in stretched and relaxed positions in patients with plantar fasciopathy. The secondary aim was to compare plantar heel pressure pain thresholds in these positions., Methods: In this cross-sectional study, we measured the plantar fascia thickness with ultrasonography, and localised pressure pain thresholds using pressure algometry of 20 patients with plantar fasciopathy. These were assessed bilaterally, with the plantar fascia in both a stretched and relaxed position. In the stretched position, toes were maximally dorsiflexed, while in the relaxed position participants' feet were hanging freely over the end of the table., Results: The plantar fascia of the most symptomatic foot was significantly thicker when stretched compared with the relaxed position (sagittal: mean difference 0.2 mm, 95%CI: 0.1-0.4, P = 0.013; frontal: mean difference - 0.27, 95%CI: - 0.49 to - 0.06, P = 0.014). The plantar fascia was significantly thinner in the frontal plane compared with the sagittal plane in both positions (stretched: mean difference - 0.2 mm, 95%CI: - 0.42 to - 0.03, P = 0.025; relaxed: mean difference - 0.3 mm, 95%CI:-0.49 to - 0.08, P = 0.008). There was no difference between pressure pain thresholds in stretched or relaxed positions in either foot (P > 0.4)., Conclusions: The plantar fascia was significantly thicker in a stretched compared with a relaxed position and in the sagittal compared with the frontal plane, but differences were smaller than the standard deviation. Pressure pain thresholds were not different between the positions. These results highlight the importance of how ultrasonography is performed and reported in research to allow for replication., Trial Registration: The study was pre-registered September 25th, 2017 on ClinicalTrials.gov ( NCT03291665 ).
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- 2020
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22. Characterisation of the teleostean κB-Ras family: The two members NKIRAS1 and NKIRAS2 from rainbow trout influence the activity of NF-κB in opposite ways.
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Sarais F, Rebl H, Verleih M, Ostermann S, Krasnov A, Köllner B, Goldammer T, and Rebl A
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- Aeromonas salmonicida, Animals, Carrier Proteins genetics, Cell Line, Fish Diseases immunology, Fish Proteins genetics, Gram-Negative Bacterial Infections immunology, Gram-Negative Bacterial Infections veterinary, Oncorhynchus mykiss genetics, Carrier Proteins immunology, Cytokines genetics, Fish Proteins immunology, NF-kappa B immunology, Oncorhynchus mykiss immunology
- Abstract
Two structurally similar NF-κB-inhibitor-interacting Ras-like proteins (NKIRAS) regulate the activity of the transcription factor NF-κB and thereby control several early immune mechanisms in mammals. We identified the orthologous sequences of NKIRAS1 and NKIRAS2 from the rainbow trout Oncorhynchus mykiss. The level of sequence identity was similarly high (≥68%) between the two and in comparison to their mammalian counterparts. Strikingly, NKIRAS2 was present as four transcript variants. These variants differed only in length and in the nucleotide composition of their 5' termini and were most likely generated by splicing along unconventional splice sites. The shortest NKIRAS2 variant was most strongly expressed in a lymphocyte-enriched population, while NKIRAS1 was most strongly expressed in cells of myeloid origin. Fluorescent-labelled NKIRAS1 and NKIRAS2 proteins from rainbow trout were detected in close association with the p65 subunit of NF-κB in the nucleus and cytoplasm of CHSE-214 cells. Subsequent reporter-gene experiments revealed that NKIRAS1 and a longer NKIRAS2 variant in rainbow trout decreased the level of activated NF-κB, while the two shortest NKIRAS2 variants increased the NF-κB activity. In addition, the overexpression of the shortest NKIRAS2 variant in CHSE-214 cells induced a stronger transcription of the genes encoding the pro-inflammatory cytokines TNF, CXCL8, and IL1B compared to non-transfected control cells. This is the first characterisation of NKIRAS orthologues in bony fish and provides additional information to the as yet underexplored inhibition pathways of NF-κB in lower vertebrates., (Copyright © 2020 The Authors. Published by Elsevier Ltd.. All rights reserved.)
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- 2020
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23. Multiple magnetic resonance imaging in patients with implanted sacral nerve stimulator.
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Heidler S, Ostermann S, Kuglitsch M, Sekic F, Wimpissinger F, Lusuardi L, and Dietersdorfer F
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- Adult, Aged, Aged, 80 and over, Female, Humans, Male, Middle Aged, Retrospective Studies, Sacrum, Electric Stimulation Therapy methods, Electrodes, Implanted adverse effects, Magnetic Resonance Imaging adverse effects
- Abstract
Aim: The aim of this study was to assess possible impacts of multiple magnetic resonance imaging (MRI) scans on the function of InterStim™ sacral neurostimulator systems (SNS; Medtronic Inc.) devices and on patient's safety., Methods: Over the course of 17 years, a total of 16 patients required 72 MRI examinations in various parts of the body. Each time an MRI was performed, the implanting urologist evaluated the SNS device function and deactivated the implant before the scan. Patients were monitored continuously during and after the procedure. After the MRI session, the site of the implanted device was examined, and the SNS device was reactivated., Results: None of the patients experienced pain or discomfort during or after the MRI scan. Impedances and stimulation amplitudes were recorded before and after MRI and showed no statistically significant changes regarding implant function. Micturition-time charts after MRI procedures were compared with previous records and showed no deviations either. No negative consequences of multiple MRIs have been observed., Conclusion: This is the first report of patients successfully undergoing multiple MRI scans despite a previously implanted SNS. Sixteen patients underwent more than one MRI scan, with no negative effect on the functional outcome of SNS or negative side effects for the patients., (© 2020 Wiley Periodicals LLC.)
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- 2020
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24. Trichinella spiralis - New method for sample preparation and objective detection of specific antigens using a chemiluminescence immunoassay.
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Braasch J, Ostermann S, Mackiewicz M, Bardot C, Pagneux C, Borchardt-Lohölter V, and Lattwein E
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The parasitic roundworm Trichinella spiralis is most commonly transmitted to humans through consumption of raw or undercooked meat of infected pigs or game. To prevent human infection, slaughterhouses perform meat safety surveillance using the gold standard "Magnetic Stirrer Method". We introduce a fast and objective method using automated detection of specific Trichinella spiralis antigens by a newly developed immunoassay based on chemiluminescence (ChLIA). Panel A comprised muscle tissue samples from non-infected pigs (n = 37). Panel B comprised muscle tissue samples from non-infected pigs spiked with different amounts of Trichinella larvae without collagen capsules (n = 56). Panel C contained muscle tissue samples from experimentally infected pigs including Trichinella larvae encapsulated in collagen (n = 32). Each sample was shredded with PBS buffer in a knife mill, destroying Trichinella larvae. Following centrifugation, the supernatant (muscle tissue extract containing released excretory and secretory Trichinella spiralis antigens) was used for Trichinella- specific antigen detection by the new Trichinella ChLIA. The overall accuracy of the Trichinella ChLIA was 97.6 %. The specificity of the Trichinella ChLIA was 100 % (panel A). The sensitivity in samples from experimentally infected pigs was 100 % representing a detection limit of 0.01 larvae per gram. Cross-reactivity with parasites other than Trichinella spp . was not observed. This new meat inspection method for the detection of Trichinella spiralis antigens presents high specificity and high sensitivity, especially in truly infected samples. In contrast to the gold standard, this new approach to meat safety surveillance does not require longsome digestion or microscopy by trained personnel., (© 2020 The Author(s).)
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- 2020
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25. Hepatitis E Virus Genotype 7 RNA and Antibody Kinetics in Naturally Infected Dromedary Calves, United Arab Emirates.
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Corman VM, Nagy P, Ostermann S, Arloth J, Liljander A, Barua R, Das Gupta A, Hakimuddin F, Juhasz J, Wernery U, and Drosten C
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- Animals, Camelus, Cattle, Genotype, Kinetics, RNA, United Arab Emirates epidemiology, Hepatitis E epidemiology, Hepatitis E veterinary, Hepatitis E virus genetics
- Abstract
Orthohepevirus A genotype 7 is a novel zoonotic variant of hepatitis E virus. To clarify infection in the animal reservoir, we virologically monitored 11 dromedary dam-calf pairs. All calves became infected during the first 6 months of life and cleared the virus after an average of 2 months. Dams did not become infected.
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- 2020
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26. Unraveling the Quantum Nature of Atomic Self-Ordering in a Ring Cavity.
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Ostermann S, Niedenzu W, and Ritsch H
- Abstract
Atomic self-ordering to a crystalline phase in optical resonators is a consequence of the intriguing nonlinear dynamics of strongly coupled atom motion and photons. Generally the resulting phase diagrams and atomic states can be largely understood on a mean-field level. However, close to the phase transition point, quantum fluctuations and atom-field entanglement play a key role and initiate the symmetry breaking. Here we propose a modified ring cavity geometry, in which the asymmetry imposed by a tilted pump beam reveals clear signatures of quantum dynamics even in a larger regime around the phase transition point. Quantum fluctuations become visible both in the dynamic and steady-state properties. Most strikingly we can identify a regime where a mean-field approximation predicts a runaway instability, while in the full quantum model the quantum fluctuations of the light field modes stabilize uniform atomic motion. The proposed geometry thus allows to unveil the "quantumness" of atomic self-ordering via experimentally directly accessible quantities.
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- 2020
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27. Cervical Disc and Ligamentous Injury in Hyperextension Trauma: MRI and Intraoperative Correlation.
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Henninger B, Kaser V, Ostermann S, Spicher A, Zegg M, Schmid R, Kremser C, and Krappinger D
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- Adult, Aged, Aged, 80 and over, Cervical Cord diagnostic imaging, Female, Humans, Male, Middle Aged, Multidetector Computed Tomography, Cervical Cord injuries, Intervertebral Disc diagnostic imaging, Magnetic Resonance Imaging, Spinal Cord Injuries diagnostic imaging
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Background and Purpose: To identify and evaluate diagnostic magnetic resonance imaging (MRI) features in patients with suspicion of discoligamentous cervical injury after hyperextension trauma of the cervical spine., Methods: MR images with a standard protocol (1.5 T, including sagittal T2-weighted images and short tau inversion recovery [STIR]) in 21 patients without any sign of fracture or instability on multidetector computed tomography of the cervical spine were assessed. Among other structures we evaluated the following: prevertebral hematoma, anterior longitudinal ligament (ALL), intervertebral disc, and spinal cord. Presence and the anatomic level of injury were identified and recorded. Results were then compared with intraoperative findings as a reference standard. Simple descriptive statistical analysis, agreement coefficients (given by calculating the percent agreement), and the determination of Gwet's AC1 coefficient were used to analyze our results., Results: The overall percent agreement between STIR and intraoperative findings was 90.9% (AC1 = .881) and for T2 69.7% (AC1 = .498). For the ALL, the overall agreement was 87.9% (AC1 = .808) and for the intervertebral disc 78.8% (AC1 = .673), in which STIR always showed a higher agreement. Prevertebral hematoma was found in 20 of 21 patients with the maximum thickness at the same anatomic level as the intraoperatively proven lesion in 12 of 18 patients (67%). Edema and/or hemorrhage of the spinal cord was shown in 16 of 21 being at the same anatomic level as the intraoperatively confirmed pathology in 16 of 16 patients (100%)., Conclusions: MRI is a reliable tool for the evaluation of discoligamentous injuries in the cervical spine, with ancillary features proven as helpful information., (© 2019 The Authors. Journal of Neuroimaging published by Wiley Periodicals, Inc. on behalf of American Society of Neuroimaging.)
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- 2020
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28. Randomized Controlled Trial of Enhanced Recovery Program Dedicated to Elderly Patients After Colorectal Surgery.
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Ostermann S, Morel P, Chalé JJ, Bucher P, Konrad B, Meier RPH, Ris F, and Schiffer ERC
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- Aged, Colonic Diseases physiopathology, Colonic Diseases surgery, Feasibility Studies, Female, Follow-Up Studies, Humans, Length of Stay, Male, Colectomy rehabilitation, Colonic Diseases rehabilitation, Defecation physiology, Elective Surgical Procedures rehabilitation, Laparoscopy rehabilitation, Postoperative Care methods, Recovery of Function
- Abstract
Background: Enhanced recovery program is a multimodal, multidisciplinary-team, evidence-based care approach to reduce perioperative surgical stress, decrease morbidity and hospital stay, and improve recovery after surgery. This program may be most beneficial for elderly (≥70 y), but sparse series have investigated this question., Objective: Feasibility and efficiency of a dedicated enhanced recovery program in the elderly as compared with standard care were studied., Design: This was a nonblinded, randomized controlled study., Settings: This study was conducted in a single high-volume university hospital., Patients: A total of 150 eligible elderly patients undergoing elective colorectal surgery were included., Interventions: Enhanced recovery after colorectal elective surgery in elderly patients was studied., Main Outcome Measures: The primary outcome was 30-day postoperative morbidity. Additional outcomes included hospital stay, readmission, postoperative pain, opioid consumption, independence preservation, and protocol compliance., Results: An enhanced recovery program reduces postoperative morbidity according to Clavien-Dindo classification by 47% as compared with standard care (35% vs 65%; p = 0.0003), total number of complications (54 vs 118; p = 0.0003), and infectious complications (13 vs 29; p = 0.001). No anastomotic leak was recorded in the enhanced recovery group versus 5 for the standard group (p = 0.01). The enhanced recovery program resulted in shorter hospital stay (7 vs 12 d; p = 0.003) and better independence preservation (home discharge, 87% vs 67%; p = 0.005). A high protocol compliance of 77.2% could be achieved in this population. According to multivariate analysis, enhanced recovery program was strongly associated with reduced morbidity (OR = 0.23 (95% CI, 0.09-0.57); p = 0.001), less severe complications (OR = 0.36 (95% CI, 0.15-0.84); p = 0.02), and shorter hospital stay (OR = 2.07 (95% CI, 1.33-3.22); p = 0.001)., Limitations: Limitations were a single-center recruitment and the impossibility of subject or healthcare professional blinding attributed to the nature of this multimodal program., Conclusions: Enhanced recovery program is safe and improves postoperative recovery in elderly patients with decreased morbidity, shorter hospital stay, and better maintenance of independence. It should therefore be considered as a standard of care for elective colorectal surgery in elderly patients. See Video Abstract at http://links.lww.com/DCR/A981., Trial Registration: clinicaltrials.gov identifier: NCT01646190. ENSAYO CONTROLADO ALEATORIZADO DE UN PROGRAMA DE RECUPERACIÓN INTENSIFICADA DEDICADO A PACIENTES DE EDAD AVANZADA DESPUÉS DE CIRUGÍA COLORECTAL: El Programa de Recuperación Intensificada es un enfoque de atención multimodal, multidisciplinaria y basada en evidencia para reducir el estrés quirúrgico perioperatorio, disminuir la morbilidad y la estancia hospitalaria, y mejorar la recuperación después de la cirugía. Este programa puede ser más beneficioso para las personas mayores (≥70 años), pero pocas series han investigado esta pregunta., Objetivo: Viabilidad y eficiencia del Programa de Recuperación Intensificada dedicado en personas de edad avanzada en comparación con la atención estándar. DISEÑO:: Este fue un estudio controlado, aleatorizado, sin método ciego., Escenario: Este estudio se realizó en un único hospital universitario de alto volumen., Pacientes: Un total de 150 pacientes de edad avanzada elegibles sometidos a cirugía colorrectal electiva fueron incluidos., Intervenciones: Recuperación Intensificada después de cirugía electiva colorrectal en pacientes de edad avanzada., Principales Medidas De Resultado: El resultado primario fue la morbilidad postoperatoria a 30 días. Los resultados adicionales incluyeron estancia hospitalaria, reingreso, dolor postoperatorio, consumo de opioides, preservación de la independencia y cumplimiento del protocolo., Resultados: El Programa de Recuperación Intensificada reduce la morbilidad postoperatoria según la clasificación de Clavien-Dindo en un 47% en comparación con la atención estándar (35% vs 65%; p = 0.0003), número total de complicaciones (54 vs 118; p = 0.0003) y complicaciones infecciosas (13 vs 29; p = 0.001). No se registró ninguna fuga anastomótica en el grupo de Recuperación Intensificada frente a 5 para el grupo estándar (p = 0.01). El Programa de Recuperación Intensificada dio como resultado una estancia hospitalaria más corta (7 contra 12 días; p = 0.003) y una mejor conservación de la independencia (alta hospitalaria: 87% vs 67%; p = 0.005). Se pudo lograr un alto cumplimiento del protocolo del 77.2% en esta población. De acuerdo con el análisis multivariable, el Programa de Recuperación Intensificada se asoció fuertemente con la reducción de morbilidad (OR = 0.23; IC 95%: 0.09-0.57; p = 0.001), menos complicaciones graves (OR = 0.36; IC 95%: 0.15-0.84; p = 0.02) y estancia hospitalaria más corta (OR = 2.07; IC 95%: 1.33-3.22; p = 0.001)., Limitaciones: Las limitaciones fueron un centro único de reclutamiento y la imposibilidad de que los pacientes o el profesional de la salud tuvieran cegamiento debido a la naturaleza de este programa multimodal., Conclusiones: El Programa de recuperación Intensificada es seguro y mejora la recuperación postoperatoria en pacientes de edad avanzada, con menor morbilidad, menor estancia hospitalaria y mejor mantenimiento de la independencia. Por lo tanto, debe considerarse como un estándar de atención para la cirugía colorrectal electiva en pacientes de edad avanzada. Vea el Resumen en video en http://links.lww.com/DCR/A981.
- Published
- 2019
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29. [Interest of enhanced recovery programs in the elderly during total hip arthroplasty A systematic review].
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Villatte G, Mathonnet M, Villeminot J, Savary M, Theissen A, Ostermann S, Erivan R, Raynaud-Simon A, and Slim K
- Subjects
- Aged, 80 and over, Humans, Length of Stay, Postoperative Care standards, Postoperative Care trends, Recovery of Function, Aged, Arthroplasty, Replacement, Hip rehabilitation
- Abstract
Enhanced recovery after surgery (ERAS) is an evident advance in the management of patients. Its feasibility and its effectiveness have been little analyzed in elderly's orthopedics. The aim of this systematic review of the literature was to analyze the feasibility (realization of classic ERAS items) and the efficiency (length of stay, morbidity and mortality) of ERAS in the elderly during total arthroplasty hip., Materials and Methods: A bibliographic search was performed with PubMed, Medline, CINAHL, Cochrane and Embase, using keywords "total hip arthroplasty", "orthopedics surgery", "fast track", "enhanced recovery after surgery", and" elderly ". Seventy-two articles were listed and 47 fully analyzed by 2 independent authors., Results: Thirty-two articles were selected. All the articles demonstrated ERAS feasibility in the elderly. The most frequently performed items were: preoperative information, spinal anesthesia and local or regional anesthetic infiltrations, multimodal analgesia with opioids sparing. Early stand-up is desirable but more difficult to achieve than in younger. Compared with traditional management, ERAS decreases the average length of stay without increasing complications, re-admissions and mortality rates. Medico-economic analyzes would be in favor of a reduction in the overall cost. The elderly's adherence to ERAS program depends on information's quality provided at the time of the consultation., Conclusion: The application of ERAS program in total hip arthroplasty in the elderly is feasible and efficient to reduce hospital stay and morbidity without increasing the complication rates. Protocols must be adapted to the particularities of this population.
- Published
- 2019
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30. SMARCA2-deficiency confers sensitivity to targeted inhibition of SMARCA4 in esophageal squamous cell carcinoma cell lines.
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Ehrenhöfer-Wölfer K, Puchner T, Schwarz C, Rippka J, Blaha-Ostermann S, Strobl U, Hörmann A, Bader G, Kornigg S, Zahn S, Sommergruber W, Schweifer N, Zichner T, Schlattl A, Neumüller RA, Shi J, Vakoc CR, Kögl M, Petronczki M, Kraut N, Pearson MA, and Wöhrle S
- Subjects
- Antineoplastic Agents pharmacology, Antineoplastic Agents therapeutic use, CRISPR-Cas Systems genetics, Cell Line, Tumor, Cell Survival genetics, DNA Helicases genetics, Epigenesis, Genetic, Esophageal Neoplasms genetics, Esophageal Neoplasms pathology, Esophageal Squamous Cell Carcinoma genetics, Esophageal Squamous Cell Carcinoma pathology, Gene Editing, Gene Expression Regulation, Neoplastic drug effects, Gene Knockdown Techniques, Gene Knockout Techniques, Humans, Loss of Function Mutation, Molecular Targeted Therapy methods, Nuclear Proteins genetics, RNA, Guide, CRISPR-Cas Systems genetics, RNA, Small Interfering metabolism, Synthetic Lethal Mutations, Transcription Factors deficiency, DNA Helicases antagonists & inhibitors, Esophageal Neoplasms drug therapy, Esophageal Squamous Cell Carcinoma drug therapy, Nuclear Proteins antagonists & inhibitors, Transcription Factors antagonists & inhibitors, Transcription Factors genetics
- Abstract
SMARCA4/BRG1 and SMARCA2/BRM, the two mutually exclusive catalytic subunits of the BAF complex, display a well-established synthetic lethal relationship in SMARCA4-deficient cancers. Using CRISPR-Cas9 screening, we identify SMARCA4 as a novel dependency in SMARCA2-deficient esophageal squamous cell carcinoma (ESCC) models, reciprocal to the known synthetic lethal interaction. Restoration of SMARCA2 expression alleviates the dependency on SMARCA4, while engineered loss of SMARCA2 renders ESCC models vulnerable to concomitant depletion of SMARCA4. Dependency on SMARCA4 is linked to its ATPase activity, but not to bromodomain function. We highlight the relevance of SMARCA4 as a drug target in esophageal cancer using an engineered ESCC cell model harboring a SMARCA4 allele amenable to targeted proteolysis and identify SMARCA4-dependent cell models with low or absent SMARCA2 expression from additional tumor types. These findings expand the concept of SMARCA2/SMARCA4 paralog dependency and suggest that pharmacological inhibition of SMARCA4 represents a novel therapeutic opportunity for SMARCA2-deficient cancers.
- Published
- 2019
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31. [Low-intensity Psychiatric Expert Monitoring and Counseling of Unemployed: Presentation of the Gütersloh Pilot Project].
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Wabnitz P, Hemkendreis B, Ostermann S, Kronmüller KT, Erdsiek R, and Nienaber A
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- Germany, Humans, Pilot Projects, Prevalence, Counseling, Unemployment
- Abstract
Objective: Psychological problems are highly prevalent in unemployed people and can lead to impairments in several areas of life. Programs to support and assist those affected, especially the long-term unemployed, are scarce. Reservations by those affected present an additional barrier with respect to health care utilisation. The authors designed a collaborative care cooperation project between a local job center and a psychiatric clinic with the aims of counselling unemployed people with psychological distress as well as offering continuing psychosocial care if required., Method: This paper presents the methodological design, clinical procedure as well as a preliminary evaluation of the pilot phase., Results: Within the first 12 months of the pilot phase, 57 long-term unemployed were enrolled in the project. Subjective psychological distress in the sample was comparable with other studies reporting high rates of psychological problems in the unemployed. The psychosocial intervention was well accepted not only by the unemployed but also by case managers and led to high re-assignment rates (n=37) to complementary services within the psychosocial health care system., Conclusion: Unemployment and psychological distress should be addressed together within collaborative care projects that can positively affect the negative interaction between unemployment and psychological distress. Low-intensity psychological interventions are well suited to address barriers that hinder health care utilization and to offer person-centered, psychological assistance., Competing Interests: Die Autoren geben an, dass kein Interessenkonflikt besteht., (© Georg Thieme Verlag KG Stuttgart · New York.)
- Published
- 2019
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32. Werner syndrome helicase is a selective vulnerability of microsatellite instability-high tumor cells.
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Lieb S, Blaha-Ostermann S, Kamper E, Rippka J, Schwarz C, Ehrenhöfer-Wölfer K, Schlattl A, Wernitznig A, Lipp JJ, Nagasaka K, van der Lelij P, Bader G, Koi M, Goel A, Neumüller RA, Peters JM, Kraut N, Pearson MA, Petronczki M, and Wöhrle S
- Subjects
- Cell Line, Tumor, Cell Survival, DNA Mismatch Repair, Humans, Models, Theoretical, Werner Syndrome Helicase genetics, Microsatellite Instability, Neoplasms therapy, Werner Syndrome Helicase antagonists & inhibitors
- Abstract
Targeted cancer therapy is based on exploiting selective dependencies of tumor cells. By leveraging recent functional screening data of cancer cell lines we identify Werner syndrome helicase (WRN) as a novel specific vulnerability of microsatellite instability-high (MSI-H) cancer cells. MSI, caused by defective mismatch repair (MMR), occurs frequently in colorectal, endometrial and gastric cancers. We demonstrate that WRN inactivation selectively impairs the viability of MSI-H but not microsatellite stable (MSS) colorectal and endometrial cancer cell lines. In MSI-H cells, WRN loss results in severe genome integrity defects. ATP-binding deficient variants of WRN fail to rescue the viability phenotype of WRN-depleted MSI-H cancer cells. Reconstitution and depletion studies indicate that WRN dependence is not attributable to acute loss of MMR gene function but might arise during sustained MMR-deficiency. Our study suggests that pharmacological inhibition of WRN helicase function represents an opportunity to develop a novel targeted therapy for MSI-H cancers., Competing Interests: SL, SB, EK, JR, CS, KE, AS, AW, JL, GB, RN, NK, MP, MP, SW Full-time employee of Boehringer Ingelheim RCV GmbH & Co KG, Vienna, Austria, KN, Pv, MK, AG, JP No competing interests declared, (© 2019, Lieb et al.)
- Published
- 2019
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33. Driven-Dissipative Supersolid in a Ring Cavity.
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Mivehvar F, Ostermann S, Piazza F, and Ritsch H
- Abstract
Supersolids are characterized by the counterintuitive coexistence of superfluid and crystalline order. Here we study a supersolid phase emerging in the steady state of a driven-dissipative system. We consider a transversely pumped Bose-Einstein condensate trapped along the axis of a ring cavity and coherently coupled to a pair of degenerate counterpropagating cavity modes. Above a threshold pump strength the interference of photons scattered into the two cavity modes results in an emergent superradiant lattice, which spontaneously breaks the continuous translational symmetry towards a periodic atomic pattern. The crystalline steady state inherits the superfluidity of the Bose-Einstein condensate, thus exhibiting genuine properties of a supersolid. A gapless collective Goldstone mode correspondingly appears in the superradiant phase, which can be nondestructively monitored via the relative phase of the two cavity modes on the cavity output. Despite cavity-photon losses the Goldstone mode remains undamped, indicating the robustness of the supersolid phase.
- Published
- 2018
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34. Effectivity of advanced wastewater treatment: reduction of in vitro endocrine activity and mutagenicity but not of in vivo reproductive toxicity.
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Giebner S, Ostermann S, Straskraba S, Oetken M, Oehlmann J, and Wagner M
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- Animals, Germany, In Vitro Techniques, Mutagenicity Tests, Reproduction drug effects, Endocrine Disruptors toxicity, Salmonella typhimurium drug effects, Snails drug effects, Waste Disposal, Fluid methods, Wastewater analysis, Water Pollutants, Chemical toxicity
- Abstract
Conventional wastewater treatment plants (WWTPs) have a limited capacity to eliminate micropollutants. One option to improve this is tertiary treatment. Accordingly, the WWTP Eriskirch at the German river Schussen has been upgraded with different combinations of ozonation, sand, and granulated activated carbon filtration. In this study, the removal of endocrine and genotoxic effects in vitro and reproductive toxicity in vivo was assessed in a 2-year long-term monitoring. All experiments were performed with aqueous and solid-phase extracted water samples. Untreated wastewater affected several endocrine endpoints in reporter gene assays. The conventional treatment removed the estrogenic and androgenic activity by 77 and 95 %, respectively. Nevertheless, high anti-estrogenic activities and reproductive toxicity persisted. All advanced treatment technologies further reduced the estrogenic activities by additional 69-86 % compared to conventional treatment, resulting in a complete removal of up to 97 %. In the Ames assay, we detected an ozone-induced mutagenicity, which was removed by subsequent filtration. This demonstrates that a post treatment to ozonation is needed to minimize toxic oxidative transformation products. In the reproduction test with the mudsnail Potamopyrgus antipodarum, a decreased number of embryos was observed for all wastewater samples. This indicates that reproductive toxicants were eliminated by neither the conventional nor the advanced treatment. Furthermore, aqueous samples showed higher anti-estrogenic and reproductive toxicity than extracted samples, indicating that the causative compounds are not extractable or were lost during extraction. This underlines the importance of the adequate handling of wastewater samples. Taken together, this study demonstrates that combinations of multiple advanced technologies reduce endocrine effects in vitro. However, they did not remove in vitro anti-estrogenicity and in vivo reproductive toxicity. This implies that a further optimization of advanced wastewater treatment is needed that goes beyond combining available technologies.
- Published
- 2018
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35. Development and validation of an OECD reproductive toxicity test guideline with the mudsnail Potamopyrgus antipodarum (Mollusca, Gastropoda).
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Ruppert K, Geiß C, Askem C, Benstead R, Brown R, Coke M, Ducrot V, Egeler P, Holbech H, Hutchinson TH, Kinnberg KL, Lagadic L, Le Page G, Macken A, Matthiessen P, Ostermann S, Schimera A, Schmitt C, Seeland-Fremer A, Smith AJ, Weltje L, and Oehlmann J
- Subjects
- Animals, Cadmium toxicity, Endocrine Disruptors toxicity, Reproduction drug effects, Toxicity Tests methods, Trialkyltin Compounds toxicity, Guidelines as Topic standards, Organisation for Economic Co-Operation and Development standards, Snails drug effects, Toxicity Tests standards, Water Pollutants, Chemical toxicity
- Abstract
Mollusks are known to be uniquely sensitive to a number of reproductive toxicants including some vertebrate endocrine disrupting chemicals. However, they have widely been ignored in environmental risk assessment procedures for chemicals. This study describes the validation of the Potamopyrgus antipodarum reproduction test within the OECD Conceptual Framework for Endocrine Disrupters Testing and Assessment. The number of embryos in the brood pouch and adult mortality serve as main endpoints. The experiments are conducted as static systems in beakers filled with artificial medium, which is aerated trough glass pipettes. The test chemical is dispersed into the medium, and adult snails are subsequently introduced into the beakers. After 28 days the reproductive success is determined by opening the brood pouch and embryo counting. This study presents the results of two validation studies of the reproduction test with eleven laboratories and the chemicals tributyltin (TBT) with nominal concentrations ranging from 10 to 1000 ng TBT-Sn/L and cadmium with concentrations from 1.56 to 25 μg/L. The test design could be implemented by all laboratories resulting in comparable effect concentrations for the endpoint number of embryos in the brood pouch. After TBT exposure mean EC
10 , EC50 , NOEC and LOEC were 35.6, 127, 39.2 and 75.7 ng Sn/L, respectively. Mean effect concentrations in cadmium exposed snails were, respectively, 6.53, 14.2, 6.45 and 12.6 μg/L. The effect concentrations are in good accordance with already published data. Both validation studies show that the reproduction test with P. antipodarum is a well-suited tool to assess reproductive effects of chemicals., (Copyright © 2017 Elsevier Ltd. All rights reserved.)- Published
- 2017
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36. Comparative sensitivity of juvenile and adult Potamopyrgus antipodarum (Mollusca: Hydrobiidae) under chronic exposure to cadmium and tributyltin.
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Ruppert K, Geiß C, Ostermann S, Theis C, and Oehlmann J
- Subjects
- Animals, Endocrine Disruptors toxicity, Endpoint Determination, Female, Hydrogen-Ion Concentration, Lethal Dose 50, Life Cycle Stages drug effects, Reproduction drug effects, Toxicity Tests, Chronic, Cadmium toxicity, Snails drug effects, Trialkyltin Compounds toxicity, Water Pollutants, Chemical toxicity
- Abstract
To investigate a potential extension of a partial life cycle test protocol to a full life cycle test design, a comparative sensitivity analysis with juvenile and adult Potamopyrgus antipodarum was performed. Neonates and adult snails were exposed to the metal cadmium (Cd) and the endocrine disruptor tributyltin (TBT) at nominal concentrations ranging from 1.56 to 50 μg Cd/L and from 25 to 1,000 ng TBT-Sn/L. The experiments were performed over 28 days at 16°C in a semi-static test design. Mortality was assessed for both life stages. Juvenile snails' specific growth rate and reproduction of adults were investigated as main endpoints. We determined effects on snails' survival, juvenile growth and embryo numbers in the brood pouch of adult snails under exposure to both chemicals. Juvenile control mortality was between 25% and 30% and significantly higher than in the control groups with adult snails. A higher sensitivity of juvenile snails compared to adults was observed for the endpoint mortality. Calculated LC50 in Cd exposed snails was 38.2 μg/L for adults and 15.0 μg/L for juvenile snails. Significant effects on mortality in TBT exposed adult snails occurred at the highest test concentration only with a LC50 of 535 ng Sn/L. Juvenile survival was significantly affected at 50.8 ng Sn/L and higher concentrations. Effect concentrations for the main endpoints reproduction and juvenile growth show comparable sensitivities. For Cd exposed groups, EC50 values were 11.3 μg/L for the endpoint reproduction in adult snails and 3.82 μg/L for juvenile growth with overlapping confidence intervals. TBT also significantly affected juvenile snails' growth (EC50: 178 ng Sn /L). EC50 for embryo numbers was 125 ng TBT-Sn/L. Results indicate the manageability of a FLC test starting with newly hatched snails. Precautions have to be taken to guarantee a sufficient number of surviving snails until adulthood so that reproduction can be assessed. For final decision for the practicability of a FLC, further tests are needed.
- Published
- 2016
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37. (13)C Tracers for Glucose Degrading Pathway Discrimination in Gluconobacter oxydans 621H.
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Ostermann S, Richhardt J, Bringer S, Bott M, Wiechert W, and Oldiges M
- Abstract
Gluconobacter oxydans 621H is used as an industrial production organism due to its exceptional ability to incompletely oxidize a great variety of carbohydrates in the periplasm. With glucose as the carbon source, up to 90% of the initial concentration is oxidized periplasmatically to gluconate and ketogluconates. Growth on glucose is biphasic and intracellular sugar catabolism proceeds via the Entner-Doudoroff pathway (EDP) and the pentose phosphate pathway (PPP). Here we studied the in vivo contributions of the two pathways to glucose catabolism on a microtiter scale. In our approach we applied specifically (13)C labeled glucose, whereby a labeling pattern in alanine was generated intracellularly. This method revealed a dynamic growth phase-dependent pathway activity with increased activity of EDP in the first and PPP in the second growth phase, respectively. Evidence for a growth phase-independent decarboxylation-carboxylation cycle around the pyruvate node was obtained from (13)C fragmentation patterns of alanine. For the first time, down-scaled microtiter plate cultivation together with (13)C-labeled substrate was applied for G. oxydans to elucidate pathway operation, exhibiting reasonable labeling costs and allowing for sufficient replicate experiments.
- Published
- 2015
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38. The relation of autonomic function to physical fitness in patients suffering from alcohol dependence.
- Author
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Herbsleb M, Schulz S, Ostermann S, Donath L, Eisenträger D, Puta C, Voss A, Gabriel HW, and Bär KJ
- Subjects
- Adult, Alcoholism diagnosis, Alcoholism psychology, Blood Gas Analysis methods, Female, Humans, Male, Physical Fitness psychology, Substance Withdrawal Syndrome diagnosis, Substance Withdrawal Syndrome psychology, Walking psychology, Young Adult, Alcoholism physiopathology, Heart Rate physiology, Physical Fitness physiology, Respiratory Mechanics physiology, Substance Withdrawal Syndrome physiopathology, Walking physiology
- Abstract
Background: Reduced cardio-vascular health has been found in patients suffering from alcohol dependence. Low cardio-respiratory fitness is an independent predictor of cardio-vascular disease., Methods: We investigated physical fitness in 22 alcohol-dependent patients 10 days after acute alcohol withdrawal and compared results with matched controls. The standardized 6-min walk test (6 MWT) was used to analyze the relationship of autonomic dysfunction and physical fitness. Ventilatory indices and gas exchanges were assessed using a portable spiroergometric system while heart rate recordings were obtained separately. We calculated walking distance, indices of heart rate variability and efficiency parameters of heart rate and breathing. In addition, levels of exhaled carbon monoxide were measured in all participants to account for differences in smoking behaviour. Multivariate analyses of variance (MANOVA) were performed to investigate differences between patients and controls with regard to autonomic and efficiency parameters., Results: Patients walked a significantly shorter distance in comparison to healthy subjects during the 6 MWT. Significantly decreased heart rate variability was observed before and after the test in patients when compared to controls, while no such difference was observed during exercise. The efficiency parameters indicated significantly reduced efficiency in physiological regulation when the obtained parameters were normalized to the distance., Discussion: The 6 MWT is an easily applied instrument to measure physical fitness in alcohol dependent patients. It can also be used during exercise interventions. Reduced physical fitness, as observed in our study, might partly be caused by autonomic dysfunction, leading to less efficient regulation of physiological processes during exercise., (Copyright © 2013 Elsevier Ireland Ltd. All rights reserved.)
- Published
- 2013
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39. Exercise reveals the interrelation of physical fitness, inflammatory response, psychopathology, and autonomic function in patients with schizophrenia.
- Author
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Ostermann S, Herbsleb M, Schulz S, Donath L, Berger S, Eisenträger D, Siebert T, Müller HJ, Puta C, Voss A, Gabriel HW, Koch K, and Bär KJ
- Subjects
- Adult, Autonomic Nervous System Diseases complications, Female, Heart Rate physiology, Humans, Male, Psychiatric Status Rating Scales, Schizophrenia immunology, Spirometry, Vagus Nerve physiopathology, Young Adult, Autonomic Nervous System Diseases physiopathology, Exercise Test methods, Inflammation immunology, Physical Fitness physiology, Schizophrenia physiopathology
- Abstract
Maintaining and improving fitness are associated with a lower risk of premature death from cardiovascular disease. Patients with schizophrenia are known to exercise less and have poorer health behaviors than average. Physical fitness and physiological regulation during exercise tasks have not been investigated to date among patients with schizophrenia. We studied autonomic modulation in a stepwise exhaustion protocol in 23 patients with schizophrenia and in matched controls, using spirometry and lactate diagnostics. Parameters of physical capacity were determined at the aerobic, anaerobic, and vagal thresholds (VT), as well as for peak output. VT was correlated with psychopathology, as assessed by the Positive and Negative Syndrome Scale, with the inflammatory markers IL-1β, IL-6, and TNF-α and with peak output. The MANOVA for heart and breathing rates, as well as for vagal modulation and complexity behavior of heart rate, indicated a profound lack of vagal modulation at all intensity levels, even after the covariate carbon monoxide concentration was introduced as a measure of smoking behavior. Significantly decreased physical capacity was demonstrated at the aerobic, anaerobic, and VT in patients. After the exercise task, reduced vagal modulation in patients correlated negatively with positive symptoms and with levels of IL-6 and TNF-α. This study shows decreased physical capacity in patients with schizophrenia. Upcoming intervention studies need to take into account the autonomic imbalance, which might predispose patients to arrhythmias during exercise. Results of inflammatory parameters are suggestive of a reduced activity of the anti-inflammatory cholinergic pathway in patients, leading to a pro-inflammatory state.
- Published
- 2013
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40. Intestinal obstruction following use of laparoscopic barbed suture: a new complication with new material?
- Author
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Buchs NC, Ostermann S, Hauser J, Roche B, Iselin CE, and Morel P
- Subjects
- Adult, Female, Foreign Bodies surgery, Humans, Intestinal Obstruction surgery, Intestine, Small surgery, Pneumoperitoneum, Risk, Foreign Bodies complications, Intestinal Obstruction etiology, Intestine, Small pathology, Laparoscopy adverse effects, Sutures adverse effects
- Abstract
Small bowel obstruction is a common pathology. Among the various etiologies, foreign material has been incriminated as a possible but uncommon cause. Recently, barbed suture has been successfully introduced in various surgical fields and has been reported as safe as standard suture. We report herein a case of intestinal obstruction due to the laparoscopic use of barbed suture during a promontofixation. Barbed suture has the risk of entrapping the small bowel. The surgeon should keep in mind this hypothetical problem and a high index of suspicion is needed to diagnose and treat quickly this potentially severe complication.
- Published
- 2012
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41. Contrast Enhanced Ultrasound of the lower limb deep venous system: a technical feasibility study. Technical innovation.
- Author
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Spiss V, Loizides A, Plaikner M, Ostermann S, Peer S, and Gruber H
- Subjects
- Adult, Feasibility Studies, Humans, Transducers, Ultrasonography, Venous Thrombosis diagnostic imaging, Contrast Media, Lower Extremity blood supply, Lower Extremity diagnostic imaging, Phospholipids, Sulfur Hexafluoride, Veins diagnostic imaging
- Abstract
Background: A clear diagnosis of deep venous thrombosis (DVT) is still challenging: many patients with unclear compression/duplex-sonography undergo a trial of anticoagulative treatment with the immanent risk of systemic hemorrhagic complications. As contrast enhanced ultrasound (CEUS) has the potential to visualize the blood pool, we conducted this pilot study to determine its potential in the characterization of the deep venous system of the lower limb., Material and Methods: CEUS was performed with a 9-3 MHz broadband linear transducer (iU22®, Philips, USA) after the standard-application of a second-generation contrast agent (SonoVue®, Bracco, Italy) in three healthy volunteers. Transverse US-scans were performed for depiction of the fibular-, posterior tibial-vein group, the popliteal, femoral, the external iliacal and the inferior caval vein at defined levels., Results: On our three volunteers the intended segments of the deep venous system of the lower limb were visualized clearly between 45 and 350 seconds by CEUS. The continuous proximal ward scanning demonstrated the venous topography up to the external iliac veins., Discussion and Conclusions: These preliminary results show that the use of CEUS is at least promising in the detection and characterization of the deep venous system of the lower limb. This should be pathbreaking, especially in patients with e.g. high Body Mass Index, local edema, diffuse inflammation etc. undergoing sonographic assessment for suspected deep vein thrombosis not definable by complete compression venous ultrasound or duplex ultrasound.
- Published
- 2011
42. Notable features in composite tissue allografts: value of high-resolution ultrasonography as a first-line imaging modality.
- Author
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Ostermann S, Loizides A, Spiss V, Peer S, and Gruber H
- Subjects
- Arteriovenous Fistula diagnostic imaging, Austria, Cicatrix diagnostic imaging, Follow-Up Studies, Forearm blood supply, Forearm innervation, Hand blood supply, Hand innervation, Humans, Male, Microsurgery methods, Neuroma diagnostic imaging, Sensitivity and Specificity, Transplantation, Homologous, Amputation, Traumatic diagnostic imaging, Amputation, Traumatic surgery, Forearm diagnostic imaging, Forearm surgery, Forearm Injuries diagnostic imaging, Forearm Injuries surgery, Graft Rejection diagnostic imaging, Hand diagnostic imaging, Hand Injuries diagnostic imaging, Hand Injuries surgery, Hand Transplantation, Image Enhancement methods, Postoperative Complications diagnostic imaging, Ultrasonography methods, Ultrasonography, Doppler, Color methods
- Abstract
Purpose: Hand transplantation is challenging, especially with respect to postoperative care. Serious complications including rejection of the transplant are possible. To date, imaging has relied mainly on plain radiography, CT and MRI. High-resolution ultrasound (HRUS) has the potential to be a quick, cost-effective and dynamic alternative at least for the initial assessment of most of these complications. We report on our experience with HRUS in three patients after bilateral hand/forearm transplantation., Materials and Methods: Three male patients with bilateral hand/forearm transplantation after traumatic amputation underwent periodic HRUS and color Doppler assessment. These exams focused especially on the detection of changes at the coaptation sites (nerve/muscle/tendon coaptation) and expected changes in vessels and healing bones in the compound allograft. The HRUS data were compared to available data of other radiological imaging modalities., Results: Relevant post-transplant changes such as neuromas, arteriovenous fistulas, heterotopic ossifications and scars were specified by HRUS. In addition information on muscle and tendon function was gained by dynamic ultrasound. In most cases no relevant information gain by other modalities was stated., Conclusion: Based on our experience, we recommend sonography as a first-line modality for the follow-up of patients who underwent composite tissue allografting. HRUS allows the reliable and timely diagnosis of relevant complications and the monitoring of postoperative changes and sets the course for therapy or further more invasive imaging., (© Georg Thieme Verlag KG Stuttgart · New York.)
- Published
- 2011
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43. Female population perception of conventional laparoscopy, transumbilical LESS, and transvaginal NOTES for cholecystectomy.
- Author
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Bucher P, Ostermann S, Pugin F, and Morel P
- Subjects
- Adolescent, Adult, Aged, Analysis of Variance, Chi-Square Distribution, Cross-Sectional Studies, Female, Humans, Middle Aged, Postoperative Complications prevention & control, Postoperative Complications psychology, Surveys and Questionnaires, Umbilicus, Vagina, Cholecystectomy, Laparoscopic methods, Natural Orifice Endoscopic Surgery methods, Patient Preference
- Abstract
Background: Recent population survey has shown a preference for transumbilical laparoendoscopic single-site surgery (U-LESS) compared with natural orifice transluminal endoscopic surgery (NOTES) for cholecystectomy, assuming similar surgical risk. This study was designed to evaluate the perception and preference of women regarding conventional laparoscopy, U-LESS, and transvaginal NOTES (TV-NOTES) with particular interest to access perception., Methods: An anonymous questionnaire on laparoscopic, U-LESS, and TV-NOTES cholecystectomy, without regards to risks or advantages, was given to female medical/paramedical staff (n=100), patients (n=100), and the general population (n=100). Women participants (median age, 35 (range, 16-79) years) were queried about preference, perception of the different accesses, and personal informations. Of the respondents, 54% had children, 79% had stable relationships, and 96% were sexually active (vaginal intercourse)., Results: With similar operative risk, 87% preferred U-LESS, 4% TV-NOTES and 8% laparoscopy. LESS/NOTES choice was influenced by a desire of improved cosmetics (82%) and lower pain (44%). 96% had worries regarding transvaginal access, among them: dyspareunia (68%), decreased sensibility during intercourse (43%), refuse of short-term sexual abstinence (40%), and infertility (23%). Transumbilical access evocated worries in 35%: umbilical pain (19%), postoperative umbilical sensibility (15%), and incisional hernia (11%). Postoperative intercourse abstinence after TV-NOTES evocated worries in 76% (defined as 3 weeks in survey): feel less attractive (40%), less feminine (32%), tension with their intimate (35%), lover non-acceptation (20%), possible abortion of new relationship (26%), and feel less comfortable socially (16%)., Conclusions: The high acceptation rate for U-LESS approach compared with TV-NOTES may be related to fears regarding postoperative sexuality and fertility. The importance of temporary postoperative sexual abstinence (vaginal intercourse) is high and may be difficult to influence. Future research on TV-NOTES should focus on the access risk to be able to scientifically reassure our patients. For now, U-LESS seems to be favor compared with TV-NOTES for cholecystectomy in female patients.
- Published
- 2011
- Full Text
- View/download PDF
44. Single port access laparoscopic cholecystectomy (with video): reply.
- Author
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Bucher P, Buchs N, Pugin F, Ostermann S, and Morel P
- Subjects
- Cholangiography, Humans, Intraoperative Care, Cholecystectomy, Laparoscopic methods
- Published
- 2011
- Full Text
- View/download PDF
45. Unusual functional compression of the deep branch of the radial nerve by a vascular branch (leash of Henry): ultrasonographic appearance.
- Author
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Loizides A, Peer S, Ostermann S, Henninger B, Stampfer-Kountchev M, and Gruber H
- Subjects
- Adult, Diagnosis, Differential, Female, Humans, Male, Middle Aged, Radial Nerve diagnostic imaging, Sensitivity and Specificity, Young Adult, Nerve Compression Syndromes diagnostic imaging, Radial Artery diagnostic imaging, Radial Neuropathy diagnostic imaging, Ultrasonography, Doppler, Color
- Abstract
Purpose: Radial nerve compression caused by crossing branches of the recurrent radial artery - so called hypertrophic "leash(es) of Henry" (LoH) - is rare. Nevertheless it is important to diagnose the type of compression neuropathy in the forearm., Materials and Methods: We report 2 subjects with unclear neuropathy of the deep branch of the radial nerve (DBRN) who showed compression by an LoH on high resolution ultrasound (HRUS) assessment. The shape and echotexture of the radial nerve were assessed with respect to the typical outer and inner texture of peripheral nerves in HRUS. Using color and/or power Doppler, an exact analysis of the surrounding soft tissues follows to search for possible atypical vessels compressing the nerve., Results: In both patients a hypertrophic leash of Henry was identified with color/power Doppler ultrasound and the direct vascular compression of the DBRN was readily demonstrated. The involved nerve segment was enlarged with a mean transverse diameter of 2.7 mm and 1.9 mm, with a hypoechoic change and partial masking of the inner fascicular texture of the nerve at the level of the LoH., Conclusion: In summary, both presented patients showed a unique topographic concordance of a textural change of the deep radial nerve (i. e., swelling and inner hypoechoic fascicular change) and the causative hypertrophic crossing artery. The use of power Doppler ultrasound in addition to caliber and texture changes shown on grayscale ultrasound and the functional visualization of pulsating vessels should be included in every sonographic examination of patients with chronic forearm pain symptoms., (© Georg Thieme Verlag KG Stuttgart · New York.)
- Published
- 2011
- Full Text
- View/download PDF
46. Population perception of surgical safety and body image trauma: a plea for scarless surgery?
- Author
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Bucher P, Pugin F, Ostermann S, Ris F, Chilcott M, and Morel P
- Subjects
- Adolescent, Adult, Age Factors, Aged, Aged, 80 and over, Attitude of Health Personnel, Cross-Sectional Studies, Esthetics, Female, Forecasting, Humans, Laparoscopes, Laparoscopy trends, Male, Middle Aged, Minimally Invasive Surgical Procedures methods, Minimally Invasive Surgical Procedures trends, Perception, Risk Assessment, Sex Factors, Surveys and Questionnaires, United States, Young Adult, Body Image, Cicatrix prevention & control, Laparoscopy methods, Natural Orifice Endoscopic Surgery methods, Patient Satisfaction statistics & numerical data
- Abstract
Background: Laparoendoscopic single-site surgery (LESS) and natural orifice translumenal endoscopic surgery (NOTES) are prospected as the future of minimally invasive surgery. While scarless surgery (NOTES and LESS) is gaining increasing popularity, perception of these approaches should be investigated., Methods: An anonymous questionnaire describing laparoscopy, LESS, and NOTES was given to medical staff (n=120), paramedical staff (n=100), surgical patients (n=100), and the general population (n=100). The survey participants (median age, 37 years; range, 18-81 years) were queried about their expectations for surgical treatment and their approach preference., Results: The first concern of the survey responders was the risk of surgical complications (92%). When asked about the respective importance of surgical safety, cure, and cosmetics, cure was placed first by 74%, safety by 33%, and cosmetics by 3%. These results were not influenced by sex, age, prior surgery or endoscopy, or education. When operative risk was similar, 90% of the participants preferred a scarless approach (75% preferred LESS and 15% preferred NOTES) to laparoscopy. The scarless approach preference was significantly higher among the younger participants (age<40 years; p=0.026), whereas sex showed no influence. The LESS preference was significantly higher among patients and the general population (86%) than among medical (67%) and paramedical (70%) staffs (p<0.001). A decreasing trend of preference for LESS and NOTES was observed with increased procedural risks., Conclusion: Although cure and safety remain the main concern, the population has a favorable perception of scarless surgery, even in the case of increased procedural risk, with LESS favored over NOTES. Such a popular adoption of scarless surgery should warrant the promotion of further research, technological innovations, and the establishment of surgeon training to improve its safety.
- Published
- 2011
- Full Text
- View/download PDF
47. Psychological predictors of college students' cell phone use while driving.
- Author
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Schlehofer MM, Thompson SC, Ting S, Ostermann S, Nierman A, and Skenderian J
- Subjects
- Adolescent, Attention, Computer Simulation, Decision Making, Female, Humans, Male, Risk-Taking, Self-Assessment, Task Performance and Analysis, Young Adult, Automobile Driving psychology, Cell Phone statistics & numerical data, Students psychology
- Abstract
Despite the known risk, many people talk on a phone while driving. This study explored psychological predictors of cell phone use while driving. College students (final N=69) completed a survey and predicted their driving performance both with and without a simultaneous phone conversation. Their actual performance on a driving simulator was then assessed. Cell phone use reduced performance on the simulation task. Further, perceiving oneself as good at compensating for driving distractions, overestimating one's performance on the driving simulator, and high illusory control predicted more frequent cell phone use while driving in everyday life. Finally, those who talked more frequently on a phone while driving had poorer real-world driving records. These findings suggest illusory control and positive illusions partly explain driver's decisions of whether to use cell phones while driving., (Copyright 2010 Elsevier Ltd. All rights reserved.)
- Published
- 2010
- Full Text
- View/download PDF
48. [Patient's point of view on surgical innovations: for less traumatic surgery and enhanced recovery].
- Author
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Bucher P, Pugin F, Ostermann S, and Morel P
- Subjects
- Endoscopy methods, Humans, Postoperative Complications prevention & control, Surgical Procedures, Operative rehabilitation, Attitude to Health, Patients, Surgical Procedures, Operative methods
- Abstract
Surgical innovations (associating LESS, NOTES, robotics, images software and Fast-track surgery) will allow a less and less invasive surgery. While these advances could be view as surgical or industrial marketing, or compared to the laparoscopic revolution, they simply answer patients' demand in a society changing its standard regarding: medical care, body image, recovery and rehabilitation. We will in this paper, according to results of a Google Survey analyzing population expectations of surgery, evaluate the interest of these surgical innovations. While, these innovations at least in part answers patients expectation, their therapeutic validity will have to be proved. It is our job, to foresee the future of surgery in accordance with health care system needs and patients expectation for adequate implementation of these innovations.
- Published
- 2010
49. Segmental duodenectomy for gastrointestinal stromal tumor of the duodenum.
- Author
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Buchs NC, Bucher P, Gervaz P, Ostermann S, Pugin F, and Morel P
- Subjects
- Adult, Aged, Disease-Free Survival, Gastrointestinal Stromal Tumors pathology, Humans, Middle Aged, Treatment Outcome, Digestive System Surgical Procedures methods, Gastrointestinal Stromal Tumors surgery, Pancreaticoduodenectomy methods
- Abstract
Aim: To evaluate the results of segmental duodenectomy (SD) and pancreaticoduodenectomy (PD) for duodenal gastrointestinal stromal tumor (GIST) and help clinicians with surgical management., Methods: All patients who underwent surgery for non-metastatic GIST of the duodenum in a single institution since 2000 were prospectively followed up. Seven patients (median age 51 years, range: 41-73 years) were enrolled: five underwent SD and two underwent PD., Results: All the patients had a complete resection (R0), with no postoperative morbidity and mortality. Among the SD group, GIST was classified as low risk in two patients, intermediate risk in two, and high risk in one, according to the Fletcher scale, (vs two high risk patients in the PD group). With a median follow-up of 41 (18-85) mo, disease-free survival (DFS) rates were 100% after SD and 0% after PD (P < 0.05). The median DFS was 13 mo in the PD group., Conclusion: Whenever associated with clear surgical margins, SD is a reliable and curative option for most duodenal GISTs, and is compatible with long-term DFS.
- Published
- 2010
- Full Text
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50. Elevated levels of MIC-1/GDF15 in the cerebrospinal fluid of patients are associated with glioblastoma and worse outcome.
- Author
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Shnaper S, Desbaillets I, Brown DA, Murat A, Migliavacca E, Schluep M, Ostermann S, Hamou MF, Stupp R, Breit SN, de Tribolet N, and Hegi ME
- Subjects
- Adolescent, Adult, Aged, Aged, 80 and over, Biomarkers, Tumor blood, Brain Neoplasms blood, Brain Neoplasms surgery, Case-Control Studies, Cohort Studies, Enzyme-Linked Immunosorbent Assay, Female, Glioblastoma blood, Glioblastoma surgery, Growth Differentiation Factor 15 blood, Growth Differentiation Factor 15 genetics, Humans, Immunoenzyme Techniques, Male, Middle Aged, Prognosis, RNA, Messenger genetics, RNA, Messenger metabolism, Reverse Transcriptase Polymerase Chain Reaction, Survival Rate, Treatment Outcome, Young Adult, Biomarkers, Tumor cerebrospinal fluid, Brain Neoplasms cerebrospinal fluid, Glioblastoma cerebrospinal fluid, Growth Differentiation Factor 15 cerebrospinal fluid
- Abstract
For patients with brain tumors identification of diagnostic and prognostic markers in easy accessible biological material, such as plasma or cerebrospinal fluid (CSF), would greatly facilitate patient management. MIC-1/GDF15 (growth differentiation factor 15) is a secreted protein of the TGF-beta superfamily and emerged as a candidate marker exhibiting increasing mRNA expression during malignant progression of glioma. Determination of MIC-1/GDF15 protein levels by ELISA in the CSF of a cohort of 94 patients with intracranial tumors including gliomas, meningioma and metastasis revealed significantly increased concentrations in glioblastoma patients (median, 229 pg/ml) when compared with control cohort of patients treated for non-neoplastic diseases (median below limit of detection of 156 pg/ml, p < 0.0001, Mann-Whitney test). However, plasma MIC-1/GDF15 levels were not elevated in the matching plasma samples from these patients. Most interestingly, patients with glioblastoma and increased CSF MIC-1/GDF15 had a shorter survival (p = 0.007, log-rank test). In conclusion, MIC-1/GDF15 protein measured in the CSF may have diagnostic and prognostic value in patients with intracranial tumors.
- Published
- 2009
- Full Text
- View/download PDF
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