151 results on '"R. Schmidmaier"'
Search Results
2. Management of primary and renal hyperparathyroidism : Guidelines from the German Association of Endocrine Surgeons (CAEK)
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Markus Luster, T Negele, Elias Karakas, P. Riss, C Dierks, Theresia Weber, Jens Waldmann, Thomas Steinmüller, Sabine Wächter, Cornelia Dotzenrath, Frank Weber, W Timmermann, O Heizmann, Roland Ladurner, Jochen Kußmann, Nada Rayes, P. Schabram, M. Hermann, C. Wicke, Bruno Niederle, Christian Vorländer, S Schopf, Kurt Werner Schmid, K Holzer, M Ketteler, A Trupka, Andreas Zielke, Henning Dralle, Kerstin Lorenz, Reto Kaderli, Detlef K. Bartsch, and R Schmidmaier
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Parathyroidectomy ,medicine.medical_specialty ,endocrine system diseases ,medicine.medical_treatment ,Medizin ,030230 surgery ,Parathyroid Glands ,03 medical and health sciences ,0302 clinical medicine ,Positron Emission Tomography Computed Tomography ,Humans ,Minimally Invasive Surgical Procedures ,Medicine ,Child ,Surgeons ,Hyperparathyroidism ,business.industry ,General surgery ,Guideline ,Vascular surgery ,Hyperparathyroidism, Primary ,medicine.disease ,Parathyroid carcinoma ,Parathyroid Hormone ,Cardiothoracic surgery ,030220 oncology & carcinogenesis ,Surgery ,610 Medizin und Gesundheit ,business ,Primary hyperparathyroidism ,Abdominal surgery - Abstract
BACKGROUND AND AIMS The purpose of this review is to provide updated recommendations for the surgical management of primary (pHPT) and renal (rHPT) hyperparathyroidism, formulating a new guideline of the German Association of Endocrine Surgeons (CAEK). METHODS Evidence-based recommendations for the diagnosis and therapy of pHPT and rHPT were assessed by a multidisciplinary panel using PubMed for a comprehensive literature search together with a structured consensus dialogue (S2k guideline of the Association of the German Scientific Medical Societies, AWMF). RESULTS During the last 20 years, a variety of new preoperative localization procedures, such as sestamibi-SPECT, 4D-CT, and various PET/CT procedures, were established for pHPT. High-resolution imaging, together with intraoperative parathyroid hormone (IOPTH) measurement, enabled focused or minimally invasive surgery to become the most favored surgical technique. Patients with pHPT and nonlocalizing imaging have a higher risk of multiglandular disease. Surgical therapy provides very high cure rates, with a clear relation to the surgeon's experience in parathyroid procedures. Reoperative parathyroidectomy, children with pHPT or familial forms, and parathyroid carcinoma are addressed and require special surgical expertise. A multidisciplinary team of experienced nephrologists, transplant, and endocrine surgeons should assess the diagnosis and treatment of renal HPT. CONCLUSION Surgery is the only curative treatment for pHPT and should be considered for all patients with pHPT. For rHPT, a more selective approach is required, and parathyroidectomy is indicated only when conservative treatment options fail. In parathyroid carcinoma, the adequacy of local resection influences local disease control.
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- 2021
3. [Differential diagnoses of osteoporosis]
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U, Stumpf, E, Hesse, W, Böcker, C, Kammerlander, C, Neuerburg, and R, Schmidmaier
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Diagnosis, Differential ,Male ,Geriatrics ,Humans ,Osteoporosis ,Female ,Multiple Myeloma ,Vitamin D Deficiency ,Monoclonal Gammopathy of Undetermined Significance ,Aged - Abstract
The differential diagnoses of osteoporosis in geriatric and trauma patients are very important as they may induce different therapies. On average approximately 20% of women and 50% of men have secondary causes of osteoporosis. The foundation of the diagnostics is a basic osteological laboratory investigation with which the most important secondary causes can be identified. From a geriatric and traumatological point of view vitamin D deficiency with secondary hyperparathyroidism, primary hyperparathyroidism, male hypogonadism, multiple myeloma and monoclonal gammopathy of unclear significance (MGUS) are of particular importance.
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- 2019
4. Identifikation, Diagnostik und leitliniengerechte Osteoporosetherapie (DVO) unfallchirurgischer Patienten
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Carl Neuerburg, Wolfgang Böcker, Christian Kammerlander, R. Schmidmaier, S. Schilling, Ulla Stumpf, and Wolf Mutschler
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Gynecology ,medicine.medical_specialty ,business.industry ,Emergency Medicine ,Medicine ,Orthopedics and Sports Medicine ,Surgery ,business - Published
- 2015
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5. Osteologisch-interdisziplinäres Management
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C. Neuerburg, B. Ockert, R. Schmidmaier, W. Böcker, F. Haasters, K. Pietschke, S. Sommerey, and U. Stumpf
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Gynecology ,medicine.medical_specialty ,business.industry ,Emergency Medicine ,medicine ,Primarer hyperparathyreoidismus ,Orthopedics and Sports Medicine ,Surgery ,Hand surgery ,business - Abstract
Nach winkelstabiler Plattenosteosynthese einer proximalen Humerusfraktur kam es bei einem 62-jahrigen Patienten zu einer geringen sekundaren Dislokation. Die Knochendichtemessung (DXA) ergab eine Osteoporose und das Basislabor sowie die Schilddrusensonographie Hinweise auf einen zugrunde liegenden primaren Hyperparathyreoidismus. Im Verlauf zog sich der Patient kontralateral eine vergleichbare Fraktur zu, die in Kenntnis der Osteoporose komplikationslos mit zementaugmentierter winkelstabiler Plattenosteosynthese behandelt wurde. Nach Parathyreoidektomie normalisierten sich die Laborparameter, Folgefrakturen traten nicht auf. Die Behandlung dieses Patienten in einem osteologischen Schwerpunktzentrum fuhrte durch eine multidisziplinare Diagnostik und differenzierte chirurgische sowie osteologische Therapie zu einem exzellenten Ergebnis.
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- 2015
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6. Neues zur systemischen Therapie des medullären Schilddrüsenkarzinoms
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Michael C. Kreissl, Matthias Kroiss, M. Fassnacht, and R. Schmidmaier
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Gynecology ,medicine.medical_specialty ,Oncology ,business.industry ,medicine ,Hematology ,business - Abstract
Das medullare Schilddrusenkarzinom ist eine sehr seltene Erkrankung (jahrliche Inzidenz 2–5/Mio. Einwohner) mit variablem, aber haufig eher indolentem klinischem Verlauf. Die Datenlage zur systemischen Therapie hat sich in den letzten Jahren deutlich verbessert. Ziel der vorliegenden Arbeit ist es, die aktuellen Therapieoptionen beim fortgeschrittenen medullaren Schilddrusenkarzinom darzustellen. Selektive Literaturrecherche; Auswertung klinischer Studien. Aufgrund des meist relativ langsamen Tumorwachstums empfiehlt sich selbst bei metastasierter Erkrankung haufig vorerst eine abwartende Strategie bzw. die Evaluation von operativen oder lokal-ablativen Verfahren. Sollte es hierunter zu einem signifikanten Progress kommen, sind mit dem Patienten die systemischen Therapieoptionen zu diskutieren. Basierend auf der Beobachtung, dass bei vielen dieser Tumoren RET-Mutationen bzw. eine gesteigerte Neoangiogenese vorliegen, wurden inzwischen zahlreiche Tyrosinkinaseinhibitoren mit vielversprechenden Ergebnissen untersucht. Seit 2012 ist mit Vandetanib erstmals ein Medikament zur Behandlung des aggressiven und symptomatischen medullaren Schilddrusenkarzinoms zugelassen. Die Datenlage zur klassischen Chemotherapie ist deutlich begrenzter, sodass diese nur im Rahmen individueller Therapiekonzepte eingesetzt wird. Um die Therapie weiter zu verbessern, sollten alle Patienten moglichst innerhalb von klinischen Studien behandelt werden.
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- 2013
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7. [Identification, diagnostics and guideline conform therapy of osteoporosis (DVO) in trauma patients : a treatment algorithm]
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C, Neuerburg, R, Schmidmaier, S, Schilling, C, Kammerlander, W, Böcker, W, Mutschler, and U, Stumpf
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Germany ,Clinical Decision-Making ,Practice Guidelines as Topic ,Humans ,Osteoporosis ,Guideline Adherence ,Risk Assessment ,Algorithms ,Osteoporotic Fractures - Abstract
Osteoporosis-associated fractures are of increasing importance in trauma surgery. The implementation of systematic diagnostics and treatment of osteoporosis during hospitalization, however, remains insufficient; therefore, a specific algorithm for the diagnosis and treatment of osteoporosis in trauma surgery patients was developed based on the German Osteology Society (Dachverband Osteologie, DVO) guidelines for osteoporosis from 2014. In a first step, the individual patient age and risk profile for osteoporosis are identified considering specific fractures indicative of osteoporosis. For these patients a questionnaire is completed which detects specific risk factors. In addition, the physical activity, risk of falls, dietary habits and the individual medication are collated as these can have a decisive influence on the subsequent therapy decisions. Prior to a specific treatment, laboratory osteoporosis tests, bone densitometry by dual energy X-ray absorptiometry (DXA) and if needed X-rays of the spine are carried out. For proximal femoral fractures the treatment of osteoporosis could already be indicated. With pre-existing glucocorticoid therapy, a history of previous fractures or other risk factors according to the risk questionnaire, the threshold of treatment has to be adjusted according to the table of T-scores detected by DXA. The treatment algorithm for diagnostics and treatment of osteoporosis in hospitalized trauma surgery patients can systematically and efficiently improve the identification of patients at risk. Thus, further fractures associated with osteoporosis or failure of internal fixation could be reduced in future. A prospective validation of the algorithm has already be initiated.
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- 2015
8. [New DVO guideline for osteoporosis management 2014 and its importance for trauma surgeons]
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C, Neuerburg, U, Stumpf, R, Schmidmaier, C, Kammerlander, J, Pfeilschifter, W, Mutschler, and W, Böcker
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Osteology ,Traumatology ,Germany ,Practice Guidelines as Topic ,Humans ,Osteoporosis ,Osteoporotic Fractures - Abstract
Osteoporosis-associated fractures represent a growing challenge in the treatment of orthopedic patients. In November 2014 a new revision of the guidelines on osteoporosis by the German Osteology Society (Dachverband Osteologie DVO) was adopted, in which additional risk factors for fractures and further treatment options have been included. On the one hand the existing model used to diagnose osteoporosis and estimate a high fracture risk as a guidance for the use of specific anti-osteoporotic therapy in patients without a fragility fracture was maintained and further refined. On the other hand the guideline includes the option to initiate a specific osteoporosis therapy without a prior bone densitometry in patients with typical radiographs of a proximal femur fracture and higher grade vertebral fractures, suspicious for osteoporosis, depending on the overall clinical context. This may reduce the treatment gap of osteoporosis in Germany. In this paper the changes in the DVO guidelines 2014 on osteoporosis are summarized, focusing on the most important changes with practical relevance for orthopedic surgeons.
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- 2015
9. [Osteological interdisciplinary management : exemplified by a bilateral proximal humeral fracture]
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C, Neuerburg, K, Pietschke, U, Stumpf, S, Sommerey, R, Schmidmaier, B, Ockert, W, Böcker, and F, Haasters
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Male ,Parathyroidectomy ,Patient Care Team ,Fracture Dislocation ,Hyperparathyroidism ,Combined Modality Therapy ,Diagnosis, Differential ,Fracture Fixation, Internal ,Treatment Outcome ,Germany ,Shoulder Fractures ,Humans ,Kyphoplasty ,Osteoporotic Fractures ,Aged - Abstract
Following locking plate osteosynthesis of a proximal humeral fracture, a 62-year-old male patient suffered mild secondary dislocation. Subsequent bone densitometry identified an osteoporosis. Laboratory testing and sonography revealed an underlying primary hyperparathyroidism. In the short term, the patient suffered a similar proximal humeral fracture of the contralateral side. Given the knowledge about the underlying osteoporosis a cement-augmented locking plate osteosynthesis was carried out to treat the fracture. Parathyroidectomy was performed shortly thereafter and laboratory parameters returned to normal. Secondary fractures did not arise. Treatment of this patient in a certified osteoporosis center with a multimodal management led to systematic interdisciplinary diagnostics, a specific surgical therapy and ended in an excellent result.
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- 2015
10. Evidence for cell adhesionmediated drug resistance of multiple myeloma cells in vivo
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R. Schmidmaier, K. Mrsdorf, P. Baumann, B. Emmerich, and G. Meinhardt
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Cancer Research ,Oncology ,Clinical Biochemistry ,Pathology and Forensic Medicine - Published
- 2006
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11. Flexible two IC chipset for DVB on cable reception
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R. Schmidmaier, M. Schoebinger, E. Krug, K. Mueller, G. Sebald, M. Haas, P. Solanti, T. Kodytek, C.v. Reventlow, S. Meier, Hans Kriedt, M. Tiebout, and F. Kuttner
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Quadrature modulation ,Digital down converter ,Chipset ,business.industry ,Computer science ,ComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKS ,Equalization (audio) ,Hardware_PERFORMANCEANDRELIABILITY ,Data_CODINGANDINFORMATIONTHEORY ,Broadcasting ,Cable television ,QAM ,Digital Video Broadcasting ,Media Technology ,Electronic engineering ,Digital television ,Electrical and Electronic Engineering ,Carrier recovery ,business ,Quadrature amplitude modulation - Abstract
A DVB compliant chipset for QAM reception on cable was developed. It consists of two ICs, a down converter and an integrated QAM processor/FEC device including ADC, digital demodulation, equalization, clock and carrier recovery, and a forward error correction.
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- 1996
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12. Architecture and circuit design of a 6-GOPS signal processor for QAM demodulator applications
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E. De Man, R. Schmidmaier, M. Schobinger, T. G. Noll, and M. Schulz
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Digital signal processor ,Engineering ,business.industry ,Clock rate ,Electrical engineering ,QAM ,Amplitude modulation ,Baud ,Electronic engineering ,Demodulation ,Electrical and Electronic Engineering ,Carrier recovery ,business ,Quadrature amplitude modulation - Abstract
A QAM processor for applications in QAM demodulators with baud rates of up to 60 Mbaud and modulation schemes of up to 1024 QAM has been implemented on a single chip. The chip performs 11-tap complex-valued adaptive time-domain equalization and the complete digital base-band signal processing of high-capacity QAM demodulators. This includes frequency-domain slope equalization and the digital parts of the timing and carrier recovery as well as the gain and offset control for the A-to-D converters. The equalizer can be operated in baud spaced and half-baud spaced mode and can also be applied for cross-polarization interference cancellation. The computational power of the QAM processor exceeds 6 giga-multiply-accumulate operations per second. Fabricated in an 1.0-/spl mu/m CMOS technology on a silicon area of 185 mm/sup 2/ this 800 K-transistor chip demonstrates the potential of such low-cost technologies. The maximum clock frequency under worst-case conditions is 60 MHz. The corresponding power dissipation is 4.2 W. >
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- 1995
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13. Helper T cells (CD3 + /CD4 + ) within the autologous peripheral blood stem cell graft positively correlate with event free survival of multiple myeloma patients
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R, Schmidmaier, N, Oversohl, B, Schnabel, C, Straka, and B, Emmerich
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Adult ,CD4-Positive T-Lymphocytes ,Male ,Peripheral Blood Stem Cell Transplantation ,CD3 Complex ,Graft vs Host Disease ,HLA-DR Antigens ,T-Lymphocytes, Helper-Inducer ,CD8-Positive T-Lymphocytes ,Middle Aged ,Flow Cytometry ,Transplantation, Autologous ,Disease-Free Survival ,Immunophenotyping ,Survival Rate ,CD4 Antigens ,Humans ,Female ,Multiple Myeloma ,Aged - Abstract
The microenvironment in the bone marrow - including lymphocytes - is part of the pathophysiology of multiple myeloma (MM). High dose chemotherapy followed by autologous stem cell transplantation is standard of care for younger patients.To determine the influence of reinfused lymphocyte subsets on event free survival (EFS) and overall survival (OS).In peripheral blood (PB) and aphaeresis products (AP) of 41 MM patients lymphocyte subsets were determined by flow cytometry and were correlated with clinical outcome.PB lymphocyte subsets did not influence EFS or OS. Residual plasma cells in the AP were not correlated with poor outcome, whereas a high percentage of B cells (CD19+) showed a trend towards reduced EFS (P = 0.051). A high amount of CD4 cells and an increased CD4/CD8 ratio were significantly associated with prolonged EFS. In contrast, high percentage of HLA-DR positive lymphocytes showed negative impact on EFS and OS (P = 0.03 and 0.02, respectively).Obtained data suggest the non-activated (HLA-DR negative) helper CD4+ T cells in the AP to be tumour protective.
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- 2008
14. ANTI-ADHESION evolves to a promising therapeutic concept in oncology
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R Schmidmaier and P Baumann
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Oncology ,medicine.medical_specialty ,Integrin ,Antineoplastic Agents ,Biochemistry ,Metastasis ,Internal medicine ,Neoplasms ,Drug Discovery ,medicine ,Cell Adhesion ,Animals ,Humans ,Cell adhesion ,Pharmacology ,biology ,Cell adhesion molecule ,Cadherin ,business.industry ,Organic Chemistry ,Cancer ,medicine.disease ,Cancer cell ,biology.protein ,Molecular Medicine ,business ,Cell Adhesion Molecules ,Selectin ,Signal Transduction - Abstract
Adhesion is a hallmark of haematological and solid cancer cells. All five classes of cell adhesion molecules (CAM) - integrins, cadherins, immunoglobulin-like CAMs, selectins and CD44s - are characteristically dysregulated in human cancer. Adhesion enables and promotes cancer-defining biological processes like growth, survival, migration, extravasation, homing, and metastasis. Furthermore, cell adhesion mediates drug resistance (CAM-DR) in multiple myeloma, malignant lymphoma, acute and chronic leukaemias, as well as in pancreatic cancer, neuroblastoma, small cell and non-small cell lung cancer, mesothelioma, colorectal carcinoma, and breast cancer. Cell adhesion protects from death by radiation, genotoxic chemotherapy, or targeted pathway inhibitors. Adhesion molecules are overexpressed on drug resistant cells (e.g. multiple myeloma or prostate cancer). Very recently, several cell adhesion mediated survival pathways have been elucidated, with key mediators being LFA-1, VLA-4, FAK, ILK, Src, PI3K, Akt, Ras, MEK, Erk, HMG-CoA reductase, Rho, Rho kinase, PKC, and NFkB. Because the surface and the intracellular targets are now known and because specific compounds are becoming increasingly available, first clinical trials regarding ANTI-ADHESION therapies are ongoing. However, in comparison to the comprehensive preclinical and clinical knowledge about CAMs, the number of drugs developed thusfar is quite low. ANTI-ADHESION strategies include targeting of surface antigens, inhibition of cell adhesion associated pathways, inhibition of CAM-DR, and targeted drug delivery. As ANTI-ADHESION is based on general characteristics of cancer cells independent of specific disease entities or treatment modalities, it may become a successful, low-toxic and broadly applicable concept in cancer treatment.
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- 2008
15. [Cancer--the desire for a second opinion is prompted by a need for orientation]
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R, Schmidmaier
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Complementary Therapies ,Patient Care Team ,Physician-Patient Relations ,Germany ,Neoplasms ,Adaptation, Psychological ,Humans ,Cooperative Behavior ,Patient Participation ,Trust ,Combined Modality Therapy ,Referral and Consultation - Abstract
After learning that they have cancer, increasing numbers of patients seek a second opinion from another specialist. The heavy burden of the diagnosis, together with the flood of information they receive can confuse the patients. The search for orientation and support can be made easier by a second specialist provided he/she provides comprehensive and relevant advice covering tumor-specific, psychological, social, physiotherapeutic and alternative-medical aspects. In this sense, a second opinion is a major element of modern oncology. Openness with regard to the second opinion strengthens the doctor-patient relationship rather than weakening it. For the primary physician it is important to know that the patient's motivation for obtaining a second opinion is, as a rule, a need for reorientation and an ability to cope with a feeling of helplessness, but not dissatisfaction with the primary physician.
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- 2007
16. Cell-cell contact mediated signalling - no fear of contact
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R, Schmidmaier, P, Baumann, and G, Meinhardt
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Cell Line, Tumor ,Humans ,Bone Marrow Cells ,Cell Communication ,Stromal Cells ,Multiple Myeloma ,Coculture Techniques ,Cell Line ,Signal Transduction - Abstract
Cancer research with sole focus on the cancer cell and possibly growth factors cannot faithfully reproduce the environmental interaction, such as adhesion of tumor cells to e.g. stromal cells, which may determine the response of these tumors to therapy. Methodologically cell adhesion studies are often difficult since complete but careful detachment is the prerequisite for most signal transduction assays. We describe for the first time an alternative method for the co-incubation of multiple myeloma cells on long term primary bone marrow stromal cultures using the bone marrow stromal cell line HS-5. The methods are precisely described, advantages and disadvantages are discussed, and troubleshooting advises are given.
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- 2006
17. [Enlarged lymph nodes--rapid diagnosis of infectious and neoplastic causes]
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G, Meinhardt and R, Schmidmaier
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Adult ,Diagnosis, Differential ,Male ,Lymphoma ,Lymphadenitis ,Biopsy ,Humans ,Female ,Lymph Nodes ,Middle Aged ,Tomography, X-Ray Computed ,Lymphatic Diseases ,Decision Support Techniques - Abstract
Although lymphadenopathy is usually an expression of a harmless, self-limiting immune reaction, it may nevertheless also signify the presence of a malignant tumor or relevant infectious disease--in particular when the swelling is sizeable, rapidly progressive, and associated symptoms are present. If, however, unfavorable criteria are definitely absent (Table 1), a wait-and-see policy with re-evaluation in three to four weeks may initially be adopted.
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- 2005
18. A 1.0-μm CMOS 60-MBaud single-chip QAM processor for digital radio applications
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R. Schmidmaier, M. Schulz, and E. de Man
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Engineering ,business.industry ,Clock rate ,Data_CODINGANDINFORMATIONTHEORY ,Digital radio ,Chip ,QAM ,CMOS ,Hardware_INTEGRATEDCIRCUITS ,Electronic engineering ,Demodulation ,Carrier recovery ,business ,Quadrature amplitude modulation - Abstract
A QAM processor for applications in QAM demodulators with modulation schemes of up to 1024 QAM and baud rates of up to 60 Mbaud has been implemented on a single chip. The chip performs all digital base-band signal processing of a high-capacity QAM demodulator including the digital parts of the timing and carrier recovery as well as the controlling and biasing functions for the proceeding A/D converters. The chip can be operated in half-baud spaced mode and can also be used for cross-polarisation interference cancellation in systems using co-channel transmission modes. The computational power of the QAM processor exceeds 5 gigamultiply-accumulate operations per second. The 800 k-transistor chip has been implemented on a chip area of 185 mm2 using a 1.0-μm CMOS technology and has a power consumption of 4.4 W at 60 MHz clock frequency.
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- 1994
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19. B029 Dihydroorotate Dehydrogenase (DHODH) is a Promising Novel Target in the Treatment of Multiple Myeloma
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C Adam, Fuat Oduncu, A Völkl, I Bumeder, S. Mandl-Weber, P. Baumann, and R Schmidmaier
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Cancer Research ,Oncology ,business.industry ,Dihydroorotate dehydrogenase ,medicine ,Cancer research ,Hematology ,General Medicine ,medicine.disease ,business ,Multiple myeloma - Published
- 2009
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20. Our novel approaches (A) in the prevention of the acute and chronic graft-versus-host disease (GvHD) and — even more important — (B) in the eradication of pre-established GvHD could help to introduce clinically a variety of adoptive immunotherapies
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P. Leskovar and R. Schmidmaier
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Cancer Research ,Graft-versus-host disease ,Oncology ,business.industry ,Immunology ,medicine ,medicine.disease ,business - Published
- 2001
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21. Our finding that the GvM and GvH effect are caused -at least partly- by different cell clones allows for the first time a selective GvM potentiation without a parallel GvHD induction
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R. Schmidmaier and P. Leskovar
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Cancer Research ,medicine.anatomical_structure ,Oncology ,Cell ,medicine ,Long-term potentiation ,Biology ,Cell biology - Published
- 2001
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22. A strong and rapid immunosuppression by extracellular ROS- cleaving enzymes (GSH-peroxidase, catalase, MnSOD, CuZnSOD) gives evidence for a permanent, O2illegible??? and O22− maintained intercellular cross talk, even in the resting state ROS- cleaving enzymes as novel immunosuppressants and HO2 and H2O2 as well as NH3 and polyamines as novel 'second messengers'
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A. Dickelhuber, R. Schmidmaier, K. Abdalla, P. Leskovar, and M. Graw
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chemistry.chemical_classification ,Cancer Research ,biology ,Resting state fMRI ,medicine.medical_treatment ,Immunosuppression ,Enzyme ,Oncology ,chemistry ,Biochemistry ,Catalase ,Second messenger system ,medicine ,biology.protein ,Extracellular ,Gsh peroxidase ,Intracellular - Published
- 2001
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23. Tumor therapy : a gradual replacement of myeloablative preparative regimens by non-ablative ones reflects the recent trend towards an indirect, immunoregulatory intervention instead of the direct attack on the tumor cells. Some important clinical implications of our extensive animal experiments
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R. Schmidmaier and P. Leskovar
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Oncology ,Cancer Research ,medicine.medical_specialty ,business.industry ,Tumor therapy ,Tumor cells ,Surgery ,Internal medicine ,Intervention (counseling) ,Direct attack ,medicine ,Non ablative ,business - Published
- 2001
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24. Establishment of a stable mixed allogeneic chimerism by the successive injection of a 1:1 mixture of mature, lifespan-preprogrammed donor plus recipient T cells or PBMCS, followed by a 1:1 mixture of immature, non-DNA-premanipulated bone marrow or stem cells of the same donor : host origin
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P. Leskovar and R. Schmidmaier
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Cancer Research ,chemistry.chemical_compound ,medicine.anatomical_structure ,Oncology ,chemistry ,Host (biology) ,medicine ,Bone marrow ,Stem cell ,Biology ,Peripheral blood mononuclear cell ,Molecular biology ,DNA - Published
- 2001
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25. Two important improvements of the conventional BMT and HSCT: (A) the routine use of a 1:1 mixture of D- and R- derived BMCS (or HSCS) preceded by the 1:1 mixture of D- and R- derived MIS effectors, and (B) the routine use of haploidentical MIS effectors, combined with BMT or HSCT
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P. Leskovar and R. Schmidmaier
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Oncology ,Cancer Research ,medicine.medical_specialty ,Pediatrics ,business.industry ,Internal medicine ,Medicine ,business - Published
- 2001
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26. New chances for a renaissance of the HSCT- supported high-dose chemotherapy by the actively prevented tolerance-reinduction against inevitable residual tumor cells in the critical early phase of the treatment-related immuno-incompetence
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P. Leskovar and R. Schmidmaier
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Oncology ,Cancer Research ,medicine.medical_specialty ,High dose chemotherapy ,business.industry ,Internal medicine ,medicine ,The Renaissance ,Tumor cells ,Early phase ,business ,Surgery - Published
- 2001
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27. The proliferation-associated superoxide anion and the differentiation-associated peroxide anion may help to explain the ambivalent role of P53 as tumor suppressor gene and as dominant transforming oncogene
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R. Schmidmaier, K. Abdalla, M. Graw, P. Leskovar, and A. Dickelhuber
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Cancer Research ,chemistry.chemical_compound ,Oncology ,chemistry ,Oncogene ,Tumor suppressor gene ,Superoxide ,Cancer research ,Peroxide - Published
- 2001
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28. Vascular ectasia of the whole intestine as a cause of recurrent gastrointestinal bleeding after high-dose chemotherapy.
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R. Schmidmaier
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- 2006
29. [Influencing fracture healing by specific osteoporosis medications].
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Stumpf U, Schmidmaier R, Taipaleenmäki H, Böcker W, Kurth A, and Hesse E
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Background: Osteoporosis is a widespread disease defined by a reduction in bone mass and structure, thereby increasing the risk of fragility fractures. Treatment typically involves specific medications, which either inhibit bone resorption (antiresorptive) or stimulate bone formation (anabolic) and may potentially influence the healing of osteoporotic fractures. On the other hand, metabolic disorders, immune system dysfunctions or circulatory problems can impair fracture healing. Therefore, the targeted use of osteoporosis medications could be a strategy to promote the healing of impaired fractures., Objective: The aim of this study is to provide a current overview of the effects of osteoporosis medications approved in Germany on fracture healing. The focus is on the potential influence of these medications in the context of osteoporosis treatment. Additionally, the current state of research is examined to explore to what extent the targeted use of these medications could improve fracture healing., Material and Methods: A literature search was conducted in the PubMed database using topic-specific keywords. Preclinical studies, clinical trials, review articles and meta-analyses were considered to present the current scientific knowledge with clinical relevance., Results: Preclinical and clinical studies suggest that specific osteoporosis medications do not have a clinically relevant negative impact on the healing of fragility fractures. Osteoanabolic substances even tend to have a positive effect on fracture healing in both normal and impaired healing processes; however, the available studies are limited and none of the medications have been approved for this specific use., Discussion: Osteoporosis medications with antiresorptive or osteoanabolic effects are primarily used to treat osteoporosis, especially after fragility fractures, to reduce the risk of further fractures. There is no clinically relevant impairment of fracture healing due to these medications. Further studies would be required to obtain approval for these medications specifically to improve fracture healing., Competing Interests: Einhaltung ethischer Richtlinien. Interessenkonflikt: U. Stumpf, R. Schmidmaier, H. Taipaleenmäki, W. Böcker, A. Kurth und E. Hesse geben an, dass kein Interessenkonflikt besteht. Für diesen Beitrag wurden von den Autor/-innen keine Studien an Menschen oder Tieren durchgeführt. Für die aufgeführten Studien gelten die jeweils dort angegebenen ethischen Richtlinien., (© 2025. The Author(s), under exclusive licence to Springer Medizin Verlag GmbH, ein Teil von Springer Nature.)
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- 2025
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30. Clinical Practice Guideline: The Diagnosis and Treatment of Osteoporosis.
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Thomasius F, Kurth A, Baum E, Drey M, Maus U, and Schmidmaier R
- Abstract
Background: Osteoporosis is a common disease that affects approximately 6 million people in Germany alone. Osteoporotic fractures impair the quality of life and may make independent living impossible. Recommendations on the diagnosis and treatment of osteoporosis are indispensable for the effective care of this large group of patients., Methods: For a thorough updating of the German clinical practice guideline (an evidence-based guideline with recommendations for clinical practice) on osteoporosis, a comprehensive, systematic search for relevant publications was carried out, including guidelines from other countries. The retrieved literature was assessed with standardized (Oxford) criteria, and clinically relevant key questions were answered according to the PICO scheme ("population, intervention, comparison, outcomes")., Results: The assessment of clinical risk factors for osteoporosis is the basis of osteoporosis diagnostics, which should be carried out quickly after a fracture. If risk factors are present in a postmenopausal woman or a man aged 50 or above, bone densitometry testing with dual-energy x-ray absorptiometry (DXA) is recommended. The further diagnostic evaluation should proceed in stepwise fashion depending on the clinical symptoms, the fracture status, and the degree of bone density reduction. Pharmacotherapy should be adapted to the fracture risk. Osteoanabolic treatment is recommended with high priority if the patient is judged to have a very high risk of fracture (10% or more in the next three years). The further course and duration of treatment should be determined individually, depending on the evolution of the patient's clinical state., Conclusion: Prerequisites for the optimal treatment of patients with osteoporosis include a correct diagnosis and interdisciplinary and interprofessional collaboration to determine and provide the proper treatment. 71% of persons with osteoporosis in Germany are still untreated, and this gap must be closed.
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- 2025
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31. Characteristics of patients with very high fracture risk in a community-dwelling geriatric cohort.
- Author
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Rippl M, Grupp P, Martini S, Müller K, Tausendfreund O, Schmidmaier R, and Drey M
- Subjects
- Humans, Aged, 80 and over, Male, Female, Aged, Risk Factors, Cohort Studies, Geriatric Assessment methods, Osteoporotic Fractures epidemiology, Independent Living, Fractures, Bone epidemiology
- Abstract
Objective: Bone anabolic treatment has been shown to be superior to oral bisphosphonates, especially in osteoporosis patients with a very high fracture-risk. The current German osteoporosis guideline classifies the very high 3-year fracture-risk based upon a novel fracture-risk model. As age is a severe risk-factor, we examined the distribution and associations to geriatric assessment parameters of the very high-risk group in a well-characterized cohort of community-dwelling geriatric patients., Methods: Analyses were based on 166 patients (mean age 82 ± 6 years) taken from MUSAR (MUnich SArcopenia Registry). Fracture-risk was calculated as described in the current German guideline. Thereupon, patients were allocated to the low-/moderate (<5 %), high- (5-10 %) or very high-risk group (>10 %). Associations of geriatric assessment parameters with the group allocation to the fracture-risk group were evaluated by covariate-adjusted linear regression analysis., Results: >80 % of the study population were at an increased fracture-risk. Besides, >50 % were allocated to the very high-risk group. Patients in the very high-risk group showed limitations in all physical performance tests (short physical performance battery (SPPB), gaitspeed, handgrip strength and chair rise test). Also, polypharmacy and a risk for malnutrition (from mini nutritional assessment short form (MNA-SF)), were present. All parameters showed significant associations with group allocation to very high-risk group., Conclusion: Most of the geriatric patients are at a very high-risk for osteoporotic fractures. Also, this group presented several limitations in the comprehensive geriatric assessment highlighting the vulnerability of this group. Clinicians need to reinforce fracture-risk assessment and familiarize with treatment options., Competing Interests: Declaration of competing interest M.D. and R.S. participated in the design of the current S3 guideline on osteoporosis. All other authors declare no conflicts of interest., (Copyright © 2024 The Authors. Published by Elsevier Inc. All rights reserved.)
- Published
- 2025
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32. Validation of the German version of the SarQoL ® questionnaire in sarcopenic and probable sarcopenic patients.
- Author
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Martini S, Held C, Schluessel S, Tausendfreund O, Schaupp A, Rippl M, Schoser B, Schmidmaier R, and Drey M
- Subjects
- Humans, Aged, Male, Female, Aged, 80 and over, Surveys and Questionnaires, Cross-Sectional Studies, Germany, Reproducibility of Results, Activities of Daily Living, Geriatric Assessment methods, Sarcopenia diagnosis, Sarcopenia physiopathology, Sarcopenia psychology, Quality of Life, Psychometrics methods
- Abstract
Background: The German version of the SarQoL
® , a sarcopenia-specific quality of life (QoL) questionnaire, has not been validated hindering its widespread use. This study aimed to evaluate the psychometric properties of the German SarQoL® ., Methods: Via a cross-sectional study participants were recruited in two geriatric outpatient facilities and one acute geriatric ward in Munich (Germany). Sarcopenia and probable sarcopenia were diagnosed with the European Working Group on Sarcopenia in Older People (EWGSOP2) algorithm. From 185 participants (age 79.8 ± 6.1), 77 had probable sarcopenia, and 51 had sarcopenia. Participants completed the SarQoL® and the European Quality-of-Life 5-Dimension (EQ-5D) questionnaires. The validation included examination of the discriminative power, construct validity, internal consistency, test-retest reliability, and floor/ceiling effects., Results: Lower SarQoL® scores for sarcopenic (p = 0.002) and probable sarcopenic subjects (p < 0.001) compared to controls indicated good discriminative power. Consistent construct validity was found for sarcopenic subjects: moderate to high correlations with domains capturing similar constructs of the EQ-5D: 'Activities of daily living' (r = -0.58, p < 0.001), 'Mobility' (r = -0.72, p < 0.001) and low correlations with domains related to different constructs like 'Pain' (r = -0.32, p < 0.022). Similar correlations were found for probable sarcopenic subjects. The Cronbach's alpha was 0.8. Test-retest reliability was excellent (intraclass coefficient correlation of = 0.96; 95% CI = 0.91-0.99), and no floor/ceiling effects were observed., Conclusion: QoL was similarly reduced in both patient cohorts compared to controls. The German SarQoL® is a valid and reliable instrument for measuring QoL in patients > 65 years of age with sarcopenia and probable sarcopenia and can now be used in epidemiological studies and clinical trials in a German-speaking population., Trial Registration: German Clinical Trials Register (DRKS)-ID: DRKS00020504 (March 12th, 2021) ., Competing Interests: Declarations Consent for publication Not applicable. (Informed consent was obtained from all participants included in the study, but the manuscript does not contain data from any individual person.) Competing interests The authors declare no competing interests. Ethics approval The Ethics Committee of the Medical Faculty of LMU approved the study (Project no.: 23–0376)., (© 2024. The Author(s).)- Published
- 2024
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33. [The current guideline for osteoporosis: aspects of treating older patients].
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Drey M, Otto S, Thomasius F, and Schmidmaier R
- Published
- 2024
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34. The somatotroph pituitary gland function in high-aged multimorbid hospitalized patients with IGF-I deficiency.
- Author
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Tausendfreund O, Bidlingmaier M, Martini S, Reif H, Rippl M, Schilbach K, Schmidmaier R, and Drey M
- Subjects
- Humans, Male, Female, Aged, 80 and over, Aged, Human Growth Hormone deficiency, Human Growth Hormone metabolism, Somatotrophs metabolism, Hospitalization, Growth Hormone-Releasing Hormone metabolism, Insulin-Like Growth Factor I metabolism, Pituitary Gland metabolism
- Abstract
Purpose: It is unclear whether the age-related decline in the somatotropic axis stems from a reduced growth hormone (GH) production in the pituitary gland, or from a peripheral origin akin to an acquired GH resistance. With the help of a GHRH/arginine test, high-aged multimorbid hospitalized patients with IGF-I deficiency are to be tested to determine whether there is primarily a pituitary GH deficiency in the sense of a somatopause., Methods: Seventeen multimorbid patients (eleven men and six women) with a mean age of 82 years, with IGF-I concentrations below two standard deviations of 30-year-old men and women were identified. Patients suffered from a variety of common age-related stable diseases including coronary artery disease, chronic liver or kidney disease, chronic heart failure as well as acute conditions e.g., urosepsis or endocarditis. To assess the somatotropic axis they underwent a GHRH/arginine test. Results were evaluated using descriptive statistics., Results: In average, the peak concentration of GH after stimulation was 14.8 µg/L with a range from 2.76 to 47.4 µg/L. Taking into account both, gender and BMI (with a mean of 26.5 kg/m²) for each participant, the pituitary gland was adequately stimulated in 16 out of the 17 patients. No patient reported common side effects related to the GHRH/arginine test., Conclusion: The somatotroph pituitary gland retains its secretory capacity in the advanced aged. Therefore, age does not seem to be the driving pacemaker for the functional decline of the somatotropic axis within the aged population., (© 2024. The Author(s).)
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- 2024
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35. Intervention skills - a neglected field of research in medical education and beyond.
- Author
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Richters C, Schmidmaier R, Popov V, Schredelseker J, Fischer F, and Fischer MR
- Subjects
- Humans, Clinical Reasoning, Research, Education, Medical methods, Clinical Competence
- Abstract
Intervention reasoning as a critical component of clinical reasoning has been understudied in medical education in contrast to the well-established field of diagnostic reasoning. This resonates in a lack of comprehensive understanding of the cognitive processes involved and a deficit in research to promote intervention skills in future clinicians. In this commentary, we present a conceptual framework for intervention reasoning that includes four phases: generating, selecting, implementing, and evaluating interventions. The conceptualization highlights cognitive processes such as developing interventions based on a patient's diagnosis and signs and symptoms; selecting the most appropriate option by contrasting, prioritizing, and evaluating interventions in terms of feasibility, effectiveness, and the patient's context-specific needs; and predicting patient outcomes within so-called "developmental corridors" to adjust treatments accordingly. In addition to these cognitive processes, interventions require collaborative activities, such as sharing information with other care providers, distributing roles among care teams, or acting together. Future research should validate the proposed framework, examine the impact of intervention reasoning on clinical outcomes, and identify effective training methods (e.g., simulation and AI-based approaches). In addition, it would be valuable to explore the transferability and generalizability of the model to other areas of health education and contexts outside of health education., Competing Interests: The authors declare that they have no competing interests., (Copyright © 2024 Richters et al.)
- Published
- 2024
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36. [Update of the S3-guideline on diagnostics, prophylaxis and treatment of osteoporosis].
- Author
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Drey M, Otto S, Thomasius F, and Schmidmaier R
- Subjects
- Humans, Aged, Female, Male, Osteoporosis diagnosis, Osteoporosis prevention & control, Osteoporosis drug therapy, Bone Density Conservation Agents therapeutic use, Bone Density Conservation Agents adverse effects, Osteoporotic Fractures prevention & control, Osteoporotic Fractures diagnosis, Practice Guidelines as Topic
- Abstract
With the aid of a new fracture risk model, the great treatment gap for osteoporosis should be closed. All patients older than 70 years should undergo a diagnostic procedure for osteoporosis. An additional risk threshold (≥ 10% per 3 years for femoral and vertebral fractures) should enable patients with a high risk of fracture to be treated with osteoanabolic agents. The use of osteoanabolic agents makes it necessary to administer antiresorptive drugs afterwards. Due to the low event rate of osteonecrosis of the jaw, the initiation of a specific osteoporosis treatment should not be delayed by prophylactic dental treatment. The adherence to the drug treatment should be improved by an individualized approach on the basis of a cooperation between patients, caregivers, and physicians. A regular assessment of falls, including the timed up and go test should be carried out in patients older than 70 years., (© 2024. The Author(s), under exclusive licence to Springer Medizin Verlag GmbH, ein Teil von Springer Nature.)
- Published
- 2024
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- View/download PDF
37. [Secondary fracture prevention/Update osteoporosis guidelines 2023 of the Umbrella Organization Osteology].
- Author
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Stumpf U and Schmidmaier R
- Subjects
- Male, Humans, Female, Middle Aged, Aged, Osteology, Quality of Life, Risk Factors, Osteoporosis diagnosis, Osteoporotic Fractures diagnosis
- Abstract
The S3 guidelines on the prophylaxis, diagnostics and treatment of osteoporosis 2023 were completely revised and updated between 2021 and 2023 in accordance with the Association of the Scientific Medical Societies of Germany (AWMF) regulations. The guideline committee consisted of delegates from the 20 specialist societies of the Umbrella Organization Osteology (Dachverband Osteologie, DVO) as well as delegates from the German Society of General Medicine and Family Medicine (DEGAM), the German Society for Nephrology (DGfN) and the Federal Self-help Association for Osteoporosis (BfO).The guidelines focus on preventive measures, diagnostic procedures and treatment approaches for osteoporosis in men aged 50 years and over and postmenopausal women. The main aim is the optimization of care processes, reduction of fracture incidences and maintenance or improvement of the quality of life and functional capacity of patients affected by fractures. A major update to the guidelines includes the introduction of a new risk calculator that can take more risk factors (n = 33) into account and that can estimate the risk of vertebral body and proximal femoral fractures for a 3-year period (previously 10 years). This results in new thresholds for diagnostics and treatment. The programmed app is currently not yet certified as a medical product and a paper version is therefore currently available for patient care with the planned integration of a web-based version of the risk calculator. From the perspective of trauma surgery, the recommendations and innovations for manifest osteoporosis are of particular clinical importance. The focus of the DVO guidelines update is therefore on the implementation of secondary fracture prevention in trauma surgery, orthopedic and geriatric traumatology in the clinical and practical daily routine., (© 2024. The Author(s), under exclusive licence to Springer Medizin Verlag GmbH, ein Teil von Springer Nature.)
- Published
- 2024
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38. Growth hormone treatment in aged patients with comorbidities: A systematic review.
- Author
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Tausendfreund O, Bidlingmaier M, Martini S, Müller K, Rippl M, Schilbach K, Schmidmaier R, and Drey M
- Subjects
- Aged, Humans, Comorbidity, Growth Hormone, Insulin-Like Growth Factor I, Quality of Life, Randomized Controlled Trials as Topic, Human Growth Hormone adverse effects, Human Growth Hormone therapeutic use, Aging pathology
- Abstract
Objective: Hormonal substitution with growth hormone in aged patients remains a debated research topic and is rarely initiated in clinical practice. This reluctance may originate from concerns about adverse effects and the uncritical use as an anti-aging agent. Nevertheless, beneficial effects for selected patients suffering from certain acute and chronic illnesses could justify its use at an advanced age. This systematic review analyzes randomized controlled studies of GH interventions in older patients with different comorbidities to assess both, beneficial and harmful effects., Design: A systematic search strategy was implemented to identify relevant studies from PubMed, MEDLINE, and The Cochrane Library., Inclusion Criteria: participants aged over 65 years, randomized controlled trials involving human growth hormone (GH) and presence of at least one additional comorbidity independent of a flawed somatotropic axis., Results: The eight eligible studies encompassed various comorbidities including osteoporosis, frailty, chronic heart failure, hip fracture, amyotrophic lateral sclerosis and hemodialysis. Outcomes varied, including changes in body composition, physical performance, strength, bone mineral density, cardiovascular parameters, quality of life and housing situation. Study protocols differed greatly in GH application frequency (daily, 2nd day or 3×/week), doses (0.41 mg-2.6 mg; mean 1.3 mg per 60 kg patient) and duration (1-12 months; mean 7 months). Mild dose-related side effects were reported, alongside noticeable positive impacts particularly on body composition, functionality, and quality of life., Conclusion: Despite limited evidence, GH treatment might offer diverse benefits with few adverse effects. Further research with IGF-I dependent indication and clear outcomes, incorporating IGF-I dependent GH titration in older adults is warranted., Competing Interests: Declaration of competing interest Not applicable., (Copyright © 2024. Published by Elsevier Ltd.)
- Published
- 2024
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39. Moderate salt restriction in primary aldosteronism improves bone metabolism through attenuation of urinary calcium and phosphate losses.
- Author
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Schneider H, Brüdgam D, Nowotny HF, Schmidmaier R, Reincke M, and Adolf C
- Subjects
- Humans, Sodium Chloride, Dietary, Calcium, Phosphates, Parathyroid Hormone, Osteoporosis, Hyperaldosteronism
- Abstract
Accumulating evidence links osteoporosis and dietary salt consumption. Primary aldosteronism (PA) is a model disease with increased dietary salt intake and constitutes an independent risk factor for osteoporosis. We, thus, assessed whether a short-term moderate reduction in salt intake in PA results in detectable osteoanabolic effects. Forty-one patients with PA on stable mineralocorticoid receptor antagonist therapy were subjected to a 12-week salt restriction. Serum and urinary electrolytes, markers of bone turnover, and a 15 steroids plasma profile were registered. After 12 weeks, urinary calcium and phosphate decreased, while plasma testosterone, serum phosphate, and bone alkaline phosphatase (BAP) all increased significantly. Longitudinal changes in BAP were independently correlated with changes in serum phosphate, parathyroid hormone, and urinary calcium in multivariate analysis. Salt restriction in PA limits urinary calcium and phosphate losses and may confer favorable osteoanabolic effects. Our findings suggest that salt restriction should be considered in patients with PA to improve bone health., Competing Interests: Conflict of interest: None declared., (© The Author(s) 2024. Published by Oxford University Press on behalf of European Society of Endocrinology.)
- Published
- 2024
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40. Hypogonadism is frequent in very old men with multimorbidity and is associated with anemia and sarcopenia.
- Author
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Schluessel S, Bidlingmaier M, Martini S, Reincke M, Reisch N, Schaupp A, Stalla G, Teupser D, Schmidmaier R, and Drey M
- Subjects
- Male, Humans, Aged, Hand Strength, Cross-Sectional Studies, Multimorbidity, Testosterone, Sarcopenia diagnosis, Sarcopenia epidemiology, Sarcopenia complications, Hypogonadism diagnosis, Hypogonadism epidemiology, Hypogonadism complications, Osteoporosis diagnosis, Osteoporosis epidemiology, Osteoporosis complications, Anemia diagnosis, Anemia epidemiology, Anemia complications
- Abstract
Background: Clinical data regarding hypogonadism in very old men with multimorbidity are rare. Hypogonadism can contribute to osteoporosis, anemia and sarcopenia and is therefore a relevant problem for geriatric patients., Methods: A total of 167 men aged 65-96 years (mean 81 ± 7 years) admitted to an acute geriatric ward were included in a cross-sectional study. Body composition derived from dual-energy X‑ray absorptiometry, bone mineral density, handgrip strength, multimorbidity, polypharmacy and laboratory values were obtained from the routine electronic clinical patient file., Results: Hypogonadism was present in 62% (n = 104) of the study participants, of whom 83% showed clinical manifestation of hypogonadism (hypogonadism in combination with anemia, sarcopenia and/or low T‑score). The subgroups showed a distribution of 52% primary and 48% secondary hypogonadism. Compared to the eugonadal patients, hypogonadal patients had reduced handgrip strength (p = 0.031) and lower hemoglobin levels (p = 0.043), even after adjustment for age, body mass index and glomerular filtration rate., Conclusion: Hypogonadism is common in geriatric patients. If chronic anemia, sarcopenia, or osteoporosis are diagnosed, testosterone levels should be determined in geriatric settings., (© 2023. The Author(s).)
- Published
- 2024
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41. High-Dose Rate Brachytherapy Combined with PD-1 Blockade as a Treatment for Metastatic Adrenocortical Carcinoma - A Single Center Case Series.
- Author
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Schwarzlmueller P, Corradini S, Seidensticker M, Zimmermann P, Schreiner J, Maier T, Triebig A, Knösel T, Pazos M, Pfluger T, Weigand I, Belka C, Ricke J, Reincke M, Schmidmaier R, and Kroiss M
- Subjects
- Humans, Female, Male, Programmed Cell Death 1 Receptor therapeutic use, Antineoplastic Combined Chemotherapy Protocols therapeutic use, Adrenocortical Carcinoma drug therapy, Adrenocortical Carcinoma radiotherapy, Brachytherapy adverse effects, Adrenal Cortex Neoplasms drug therapy, Adrenal Cortex Neoplasms radiotherapy
- Abstract
The response rate of advanced adrenocortical carcinoma (ACC) to standard chemotherapy with mitotane and etoposide/doxorubicin/cisplatin (EDP-M) is unsatisfactory, and benefit is frequently short lived. Immune checkpoint inhibitors (CPI) have been examined in patient's refractory to EDP-M, but objective response rates are only approximately 15%. High-dose rate brachytherapy (HDR-BT) is a catheter-based internal radiotherapy and expected to favorably combine with immunotherapies. Here we describe three cases of patients with advanced ACC who were treated with HDR-BT and the CPI pembrolizumab. None of the tumors were positive for established response markers to CPI. All patients were female, had progressed on EDP-M and received external beam radiation therapy for metastatic ACC. Pembrolizumab was initiated 7 or 23 months after brachytherapy in two cases and prior to brachytherapy in one case. Best response of lesions treated with brachytherapy was complete (n=2) or partial response (n=1) that was ongoing at last follow up after 23, 45 and 4 months, respectively. Considering all sites of tumor, response was complete and partial remission in the two patients with brachytherapy prior to pembrolizumab. The third patient developed progressive disease with severe Cushing's syndrome and died due to COVID-19. Immune-related adverse events of colitis (grade 3), gastroduodenitis (grade 3), pneumonitis (grade 2) and thyroiditis (grade 1) occurred in the two patients with systemic response. HDR-BT controlled metastases locally. Sequential combination with CPI therapy may enhance an abscopal antitumoral effect in non-irradiated metastases in ACC. Systematic studies are required to confirm this preliminary experience and to understand underlying mechanisms., Competing Interests: The authors declare that they have no conflict of interest., (Thieme. All rights reserved.)
- Published
- 2024
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42. Insights into diagnostic errors in endocrinology: a prospective, case-based, international study.
- Author
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Frey J, Braun LT, Handgriff L, Kendziora B, Fischer MR, Reincke M, Zwaan L, and Schmidmaier R
- Subjects
- Humans, Prospective Studies, Diagnostic Errors prevention & control, Internal Medicine, Endocrinology, General Practitioners
- Abstract
Background: Diagnostic errors in internal medicine are common. While cognitive errors have previously been identified to be the most common contributor to errors, very little is known about errors in specific fields of internal medicine such as endocrinology. This prospective, multicenter study focused on better understanding the causes of diagnostic errors made by general practitioners and internal specialists in the area of endocrinology., Methods: From August 2019 until January 2020, 24 physicians completed five endocrine cases on an online platform that simulated the diagnostic process. After each case, the participants had to state and explain why they chose their assumed diagnosis. The data gathering process as well as the participants' explanations were quantitatively and qualitatively analyzed to determine the causes of the errors. The diagnostic processes in correctly and incorrectly solved cases were compared., Results: Seven different causes of diagnostic error were identified, the most frequent being misidentification (mistaking one diagnosis with a related one or with more frequent and similar diseases) in 23% of the cases. Other causes were faulty context generation (21%) and premature closure (17%). The diagnostic confidence did not differ between correctly and incorrectly solved cases (median 8 out of 10, p = 0.24). However, in incorrectly solved cases, physicians spent less time on the technical findings (such as lab results, imaging) (median 250 s versus 199 s, p < 0.049)., Conclusions: The causes for errors in endocrine case scenarios are similar to the causes in other fields of internal medicine. Spending more time on technical findings might prevent misdiagnoses in everyday clinical practice., (© 2023. The Author(s).)
- Published
- 2023
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43. 11-beta-hydroxysteroid dehydrogenase type 1 (HSD11B1) gene expression in muscle is linked to reduced skeletal muscle index in sarcopenic patients.
- Author
-
Schluessel S, Zhang W, Nowotny H, Bidlingmaier M, Hintze S, Kunz S, Martini S, Mehaffey S, Meinke P, Neuerburg C, Schmidmaier R, Schoser B, Reisch N, and Drey M
- Subjects
- Aged, Aged, 80 and over, Female, Humans, Middle Aged, Gene Expression, Glucocorticoids metabolism, Muscle, Skeletal, 11-beta-Hydroxysteroid Dehydrogenase Type 1 genetics, 11-beta-Hydroxysteroid Dehydrogenase Type 1 metabolism, Cortisone metabolism, Sarcopenia genetics
- Abstract
Background: Glucocorticoids play a significant role in metabolic processes and pathways that impact muscle size, mass, and function. The expression of 11-beta-hydroxysteroid dehydrogenase type 1 (HSD11B1) has been previously described as a major regulator of skeletal muscle function in glucocorticoid-induced muscle atrophy and aging humans. Our study aimed to investigate glucocorticoid metabolism, including the expression of HSD11B1 in skeletal muscle, in patients with sarcopenia., Methods: Muscle biopsies were taken from the vastus lateralis muscle of thirty-three patients over 60 years of age with hip fractures. Sarcopenia status was assessed according to the criteria of the European Working Group on Sarcopenia in Older People 2. Skeletal muscle mass was measured by bioelectrical impedance analysis. Cortisol and cortisone concentrations were measured in serum. Gene expression analysis of HSD11B1, NR3C1, FBXO32, and TRIM63 in muscle biopsies was performed. Serial cross sections of skeletal muscle were labeled with myosin heavy chain slow (fiber type-1) and fast (fiber type-2) antibodies., Results: The study included 33 patients (21 women) with a mean age of 82.5 ± 6.3 years, 17 patients revealed sarcopenic (n = 16 non-sarcopenic). Serum cortisone concentrations were negatively correlated with muscle mass (ß = - 0.425; p = 0.034) and type-2 fiber diameter (ß = - 0.591; p = 0.003). Gene expression of HSD11B1 (ß = - 0.673; p = 0.008) showed a negative correlation with muscle mass in the sarcopenic group. A significant correlation was found for the non-sarcopenic group for NR3C1 (ß = 0.548; p = 0.028) and muscle mass., Conclusion: These findings suggest a pathogenetic role of HSD11B1 in sarcopenic muscle., (© 2023. The Author(s).)
- Published
- 2023
- Full Text
- View/download PDF
44. [Update of the S3-guideline on diagnostics, prophylaxis and treatment of osteoporosis].
- Author
-
Drey M, Otto S, Thomasius F, and Schmidmaier R
- Subjects
- Humans, Postural Balance, Time and Motion Studies, Osteoporosis diagnosis, Osteoporosis drug therapy, Osteoporosis prevention & control, Bone Density Conservation Agents adverse effects, Fractures, Bone, Osteoporotic Fractures diagnosis, Osteoporotic Fractures prevention & control, Osteoporotic Fractures drug therapy
- Abstract
With the aid of a new fracture risk model, the great treatment gap for osteoporosis should be closed. All patients older than 70 years should undergo a diagnostic procedure for osteoporosis. An additional risk threshold (≥ 10% per 3 years for femoral and vertebral fractures) should enable patients with a high risk of fracture to be treated with osteoanabolic agents. The use of osteoanabolic agents makes it necessary to administer antiresorptive drugs afterwards. Due to the low event rate of osteonecrosis of the jaw, the initiation of a specific osteoporosis treatment should not be delayed by prophylactic dental treatment. The adherence to the drug treatment should be improved by an individualized approach on the basis of a cooperation between patients, caregivers, and physicians. A regular assessment of falls, including the timed up and go test should be carried out in patients older than 70 years., (© 2023. The Author(s), under exclusive licence to Springer Medizin Verlag GmbH, ein Teil von Springer Nature.)
- Published
- 2023
- Full Text
- View/download PDF
45. [Osteoporosis: treatment of high-risk patients].
- Author
-
Schmidmaier R
- Abstract
Nowadays, different drugs are available for specific treatment of osteoporosis. On the one hand, antiresorptives (raloxifene, bisphosphonates, denosumab) and, on the other hand, bone anabolic drugs (teriparatide and romosozumab) can be used. For both bone anabolic agents, superiority over oral bisphosphonates in high-risk patients was shown in randomized comparative studies. High-risk patients represent a subgroup of osteoporosis patients requiring treatment with a particularly high fracture risk. The very high risk can be recognized by the clinical manifestation (hip or vertebral fracture), the very low T‑score and/or the clinical risk factors (exceeding the bone anabolic threshold of the DVO risk calculator). High-risk patients should be treated with bone anabolic drugs in the first line of treatment. Patients treated with antiresorptives, who develop a very high risk in the course of the disease should be escalated to bone anabolic compounds. Every bone anabolic treatment requires an antiresorptive follow-up treatment. Drug holidays are only possible in exceptional cases for high-risk patients., (© 2023. The Author(s), under exclusive licence to Springer Medizin Verlag GmbH, ein Teil von Springer Nature.)
- Published
- 2023
- Full Text
- View/download PDF
46. Oral health in patients with neurodegenerative and cerebrovascular disease: a retrospective study.
- Author
-
Auerbacher M, Gebetsberger L, Kaisarly D, Schmidmaier R, Hickel R, and Drey M
- Subjects
- Humans, Aged, Retrospective Studies, Toothbrushing, Oral Hygiene, Oral Health, Cerebrovascular Disorders
- Abstract
Purpose: This retrospective study investigates oral health and oral care in patients with neurodegenerative and cerebrovascular diseases (CVDs) treated in a dental facility for people with disabilities., Methods: Oral health indices decayed, missing, and filled teeth (DMFT), periodontal screening index (PSI), treatment spectrum, and oral hygiene were evaluated in 152 patients with multiple sclerosis, Parkinson's disease, dementia, and CVD and 30 controls. Regression analyses identified group differences and influencing factors on DMFT., Results: Patients with neurodegenerative or CVD had a significantly higher DMFT (21.2 ± 5.8 vs. 18.3 ± 5.9), more decayed teeth (4.3 ± 4.8 vs. 1 ± 1.9), fewer filled teeth (7.9 ± 5.5 vs. 11 ± 5.6), and a higher number of surgical (39.5% vs. 20%) treatments but significantly less conservative (49.3% vs. 73.3%) and prosthetic (15.1% vs. 56.7%) treatments than the control group ( p < 0.05). The frequency of toothbrushing and the use of an electric toothbrush were related to lower DMFT in patients with neurodegenerative and CVD. Smoking was associated with higher DMFT., Conclusions: Poor oral health was found in all individuals with disabilities, suggesting that limitations in oral care attributed to aging and neurological disorders negatively affect oral health. Oral rehabilitation of patients with disabilities requires awareness of oral health limitations and early intervention through dental care. Implications for rehabilitationPoor oral health and oral hygiene is common among older people with disabilities.To optimize oral rehabilitation of patients with disabilities, early intervention, individualized treatment plans and an adapted time frame for dental treatment are required.Education of dentists, caregivers, and family members is essential for oral rehabilitation and improvement of oral hygiene in patients with disabilities.
- Published
- 2023
- Full Text
- View/download PDF
47. Bayesian versus diagnostic information in physician-patient communication: Effects of direction of statistical information and presentation of visualization.
- Author
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Brose SF, Binder K, Fischer MR, Reincke M, Braun LT, and Schmidmaier R
- Subjects
- Humans, Bayes Theorem, Problem Solving, Communication, Physician-Patient Relations, Physicians
- Abstract
Background: Communicating well with patients is a competence central to everyday clinical practice, and communicating statistical information, especially in Bayesian reasoning tasks, can be challenging. In Bayesian reasoning tasks, information can be communicated in two different ways (which we call directions of information): The direction of Bayesian information (e.g., proportion of people tested positive among those with the disease) and the direction of diagnostic information (e.g., the proportion of people having the disease among those tested positive). The purpose of this study was to analyze the impact of both the direction of the information presented and whether a visualization (frequency net) is presented with it on patient's ability to quantify a positive predictive value., Material and Methods: 109 participants completed four different medical cases (2⨯2⨯4 design) that were presented in a video; a physician communicated frequencies using different directions of information (Bayesian information vs. diagnostic information). In half of the cases for each direction, participants were given a frequency net. After watching the video, participants stated a positive predictive value. Accuracy and speed of response were analyzed., Results: Communicating with Bayesian information led to participant performance of only 10% (without frequency net) and 37% (with frequency net) accuracy. The tasks communicated with diagnostic information but without a frequency net were correctly solved by 72% of participants, but accuracy rate decreased to 61% when participants were given a frequency net. Participants with correct responses in the Bayesian information version without visualization took longest to complete the tasks (median of 106 seconds; median of 13.5, 14.0, and 14.5 seconds in other versions)., Discussion: Communicating with diagnostic information rather than Bayesian information helps patients to understand specific information better and more quickly. Patients' understanding of the relevance of test results is strongly dependent on the way the information is presented., Competing Interests: The authors have declared that no competing interests exist., (Copyright: © 2023 Brose et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.)
- Published
- 2023
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48. Predictive Value of Prognostic Nutritional Index for Early Postoperative Mobility in Elderly Patients with Pertrochanteric Fracture Treated with Intramedullary Nail Osteosynthesis.
- Author
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Faust LM, Lerchenberger M, Gleich J, Linhart C, Keppler AM, Schmidmaier R, Böcker W, Neuerburg C, and Zhang Y
- Abstract
Background: Early postoperative mobilization is essential for orthogeriatric patients. The prognostic nutritional index (PNI) is widely used to evaluate nutritional status. This study sought to investigate the predictive value of PNI for early postoperative mobility in patients with pertrochanteric femur fractures., Materials and Methods: This study included 156 geriatric patients with pertrochanteric femur fractures treated with TFN-Advance™ (DePuy Synthes, Raynham, MA, USA). Mobility was evaluated on the third postoperative day and by discharge. Stepwise logistic regression analyses were performed to evaluate the association significance of PNI with postoperative mobility together with comorbidities. The optimal PNI cut-off value for mobility was analyzed using the receiver operating characteristic (ROC) curve., Results: Three days postoperatively, PNI was an independent predictor of mobility (OR: 1.14, 95% CI: 1.07-1.23, p < 0.01). By discharge, it was found that PNI (OR: 1.18, 95% CI: 1.08-1.30, p < 0.01) and dementia (OR: 0.17, 95% CI: 0.07-0.40, p < 0.001) were significant predictors. PNI correlated weakly with age (r = -0.27, p < 0.001). The PNI cut-off value for mobility on the third postoperative day was 38.1 (specificity = 78.5%, sensitivity = 63.6%)., Conclusions: Our findings indicate that PNI is an independent predictor of early postoperative mobility in geriatric patients with pertrochanteric femur fractures treated with TFNA™.
- Published
- 2023
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49. Resistance training-induced improvement in physical function is not associated to changes in endocrine somatotropic activity in prefrail older adults.
- Author
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Schaupp A, Bidlingmaier M, Martini S, Reincke M, Schluessel S, Schmidmaier R, and Drey M
- Abstract
Context: Resistance training improves muscle function in prefrail and frail elderly. The role of the somatotropic axis in this physiologic process remains unclear. Insulin-like growth factor I (IGF-I) and its associated proteins Insulin-like growth factor binding protein 3 (IGFBP3) and acid labile subunit (ALS) build a circulating ternary complex that mediates growth hormone (GH) effects on peripheral organs and can serve as a measure of endocrine somatotropic activity., Objective: The aim of this study was to assess the association between resistance training-induced changes in physical performance and basal levels of IGF-I, IGFBP-3 and ALS in prefrail older adults., Methods: 69 prefrail community-dwelling older adults, aged 65 to 94 years, were randomly assigned to a 12-week period of strength or power training or to a control group. The study was registered at clinicaltrials.gov as NCT00783159. Serum concentrations of IGF-I, IGFBP-3 and ALS were measured at rest before and after the intervention. Hormonal differences were examined in relation to changes in physical performance assessed by the Short Physical Performance Battery (SPPB)., Results: While resistance training led to significant improvements in SPPB score it did not induce significant differences in somatotropic hormone concentrations. Pre- and post-intervention changes in IGF-I, IGFBP-3, ALS or IGF/IGFBP-3 molar ratio were not related to the intervention mode, even after adjustment for age, sex, nutritional status, as well as SPPB and hormone concentrations at baseline., Conclusion: Training-induced improvements in physical performance in prefrail older adults were not associated with significant changes in endocrine somatotropic activity., Competing Interests: Declaration of Competing Interest The authors declare that they have no conflict of interest., (Copyright © 2022. Published by Elsevier B.V.)
- Published
- 2022
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50. Preoperative Imaging with [ 18 F]-Fluorocholine PET/CT in Primary Hyperparathyroidism.
- Author
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Dekorsy FJ, Beyer L, Spitzweg C, Schmidmaier R, Todica A, Trupka A, Cyran CC, Berger F, Ladurner R, Zimmermann P, Knösel T, Bartenstein P, Lottspeich C, and Wenter V
- Abstract
Primary hyperparathyroidism (pHPT) is a common endocrine disorder due to hyperfunctioning parathyroid glands. To date, the only curing therapy is surgical removal of the dysfunctional gland, making correct detection and localization crucial in order to perform a minimally invasive parathyroidectomy.
18 F-Fluorocholine positron emission tomography/computed tomography (18 F-FCH PET/CT) has shown promising results for the detection of pHPT, suggesting superiority over conventional imaging with ultrasounds or scintigraphy. A total of 33 patients with pHPT who had negative or equivocal findings in conventional imaging received18 F-FCH PET/CT preoperatively and were retrospectively included. A pathological hyperfunctional parathyroid gland was diagnosed in 24 cases (positive PET, 72.7%), 4 cases showed equivocal choline uptake (equivocal PET, 12.1%), and in 5 cases, no enhanced choline uptake was evident (negative PET, 15.2%). Twelve of the twenty-four detected adenoma patients underwent surgery, and in all cases, a pathological parathyroid adenoma was resected at the site detected by PET/CT. Two of the six patients without pathological choline uptake who received a parathyroidectomy revealed no evidence of parathyroid adenoma tissue in the histopathological evaluation. This retrospective study analyzes18 F-FCH PET/CT in a challenging patient cohort with pHPT and negative or equivocal conventional imaging results and supports the use of18 F-FCH for the diagnosis of hyperfunctional parathyroid tissue, especially in this patient setting, with a 100% true positive and true negative detection rate. Our study further demonstrates the importance of18 F-FCH PET/CT for successful surgical guidance.- Published
- 2022
- Full Text
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