8 results on '"Weimer, Andreas Michael"'
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2. Digital Transformation in Musculoskeletal Ultrasound: Acceptability of Blended Learning
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Weimer, Andreas Michael, primary, Berthold, Rainer, additional, Schamberger, Christian, additional, Vieth, Thomas, additional, Balser, Gerd, additional, Berthold, Svenja, additional, Stein, Stephan, additional, Müller, Lukas, additional, Merkel, Daniel, additional, Recker, Florian, additional, Schmidmaier, Gerhard, additional, Rink, Maximilian, additional, Künzel, Julian, additional, Kloeckner, Roman, additional, and Weimer, Johannes, additional
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- 2023
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3. Long-Term Effectiveness and Sustainability of Integrating Peer-Assisted Ultrasound Courses into Medical School—A Prospective Study
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Weimer, Johannes Matthias, primary, Widmer, Nina, additional, Strelow, Kai-Uwe, additional, Hopf, Paula, additional, Buggenhagen, Holger, additional, Dirks, Klaus, additional, Künzel, Julian, additional, Börner, Norbert, additional, Weimer, Andreas Michael, additional, Lorenz, Liv Annebritt, additional, Rink, Maximilian, additional, Bellhäuser, Henrik, additional, Schiestl, Lina Judit, additional, Kloeckner, Roman, additional, Müller, Lukas, additional, and Weinmann-Menke, Julia, additional
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- 2023
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4. Development and Integration of DOPS as Formative Tests in Head and Neck Ultrasound Education: Proof of Concept Study for Exploration of Perceptions
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Weimer, Johannes Matthias, primary, Rink, Maximilian, additional, Müller, Lukas, additional, Dirks, Klaus, additional, Ille, Carlotta, additional, Bozzato, Alessandro, additional, Sproll, Christoph, additional, Weimer, Andreas Michael, additional, Neubert, Christian, additional, Buggenhagen, Holger, additional, Ernst, Benjamin Philipp, additional, Symeou, Luisa, additional, Lorenz, Liv Annebritt, additional, Hollinderbäumer, Anke, additional, and Künzel, Julian, additional
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- 2023
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5. In vitro Analyse der primären Rotationsstabilität zementfreier Hüftkurzschaftprothesen unter Berücksichtigung einer valgischen Implantatstellung
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Weimer, Andreas Michael and Klinik und Poliklinik für Orthopädie und Orthopädische Chirurgie
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ddc:610 ,Medical sciences Medicine - Abstract
Die Implantation von Hüftgelenksendoprothesen zählt zu den häufigsten Operationen der Orthopädischen Chirurgie. Der Erfolg einer stabilen Verankerung zementfrei eingebrachter Prothesenschäfte ist maÃgeblich von dem Ausmaà der Mikrorelativbewegungen an der Implantat-Knochen-Grenzfläche abhängig. Eine ausreichend vorhandene primäre Rotationsstabilität ist dabei ein wichtiger Prognosefaktor für eine erfolgreiche Osteointegration und Funktion. Ein epidemiologisch-demographisch bedingter Anstieg von Revisions- und Wechseloperationen führte in den vergangenen Jahren zu einer rasanten Weiterentwicklung und Nachfrage knochensparender Kurzschaftsysteme. Ziel dieses Forschungsprojektes ist es daher, aktuell verwendete Hüftkurzschaftendoprothesen experimentell auf ihre Primärstabilität zu prüfen, sowie den Einfluss einer von der Norm abweichenden valgischen Implantatstellung auf das jeweilige Verankerungsverhalten zu untersuchen. Drei Hüftkurzschaftsysteme (AIDA, Metha, MiniHip) wurden untersucht und dabei sowohl in neutraler als auch in valgischer Schaftposition nach einem standardisierten Protokoll in jeweils fünf Kunststoffemora implantiert. AnschlieÃend erfolgte die Einleitung von rückwirkungsfreien Drehmomenten in stufenlosen Intervallen von ± 7Nm in die Implantate. Als zentrale statistische Methode wurden Varianzanalysen als gemischtes Modell bei einem auf p < 0,05 festgelegtem Signifikanzniveau angewand. Die Hauptverankerungszone â frei von der Schaftposition â befindet sich bei allen Kurzschaftmodellen im meta-/diaphysären Ãbergangsbereich. Dennoch besitzen die Prothesen ein vorrangig proximales Verankerungsverhalten. Eine die Osteointegration gefährdende Ãberschreitung des kritischen Grenzwertes der Mikrorelativbewegungen von 150 mikrometer im Prothesen-Knochen-Verbund zeigte lediglich das valgisch implantierte MiniHip-Kurzschaftsystem. Das Fehlen einer ausreichenden lateralen Schaftanlage in Verbindung mit einem ovalen Flächenquerschnitt verhindert eine suffiziente Primärstabilität. Bei der Weiterentwicklung von Kurzschaftsystemen sollte daher auf ein mehrkonisches, kurviertes Prothesendesign mit eher zirkulo-trapeziodalem Querschnitt und sich nach distal verjüngendem Schaft geachtet werden, um unphysiologisch hohe Bewegungen im distalen Prothesen-Knochenverbund zu verringern, und um eine von der Norm abweichende valgische Implantatstellung besser kompensieren zu können. The implantation of hip endoprostheses is one of the most common operations in orthopaedic surgery. The success of a stable anchorage of cementless prosthesis shafts largely depends on the extent of the micro-relative movements at the implant-bone interface. A sufficient primary rotational stability is an important prognostic factor for successful osteointegration and function. In recent years, the demographically induced increase in revision and replacement operations leads to a rapid development of and demand for bone-saving short shaft systems. The aim of this project is to analyze short hip-stem prosthesis experimentally regarding to their primary stability. The project also investigates the influence of a deviating valgus implant position to the bending behaviour of the prosthesis models. Three hip short shaft systems (AIDA®, Metha®, MiniHipTM) were investigated and each prosthesis was implanted in five plastic femora in both neutral and valgus shaft stem position according to a standardized protocol. Subsequently torques were applied to the prosthesis at a stepless interval of ± 7Nm. As the central statistical method of this study variance analyses are applied as a mixed model with a significance level fixed at p < 0.05. The main anchoring zone - independent of the stem position - is located in the meta/diaphyseal transition area in all prosthesis-systems, but the prostheses still exhibit a mainly proximal anchoring behavior. Only the valgically implanted MiniHipTM exceeds the critical limit of microrelative movements of 150 micrometer between prosthesis and bone, that endangered osteointegration. A lack of lateral shaft contact in combination with an oval cross-sectional area prevents sufficient primary stability. In the further development of short shaft systems attention should therefore be paid to a multi-conical curved prosthesis design with a more circolotrapeziodal cross-sectional area and a shaft, that tapers distally to reduce unphysiologically high movements in the distal prosthesis-bone connection to compensate a deviating valgus implant position better.
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- 2020
6. Insights Into Modern Undergraduate Ultrasound Education: Prospective Comparison of Digital and Analog Teaching Resources in a Flipped Classroom Concept - The DIvAN Study.
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Weimer JM, Recker F, Horn L, Kuenzel J, Dirks K, Ille C, Buggenhagen H, Börner N, Weimer AM, Vieth T, Lorenz L, Rink M, Merkel D, Dionysopoulou A, Ludwig M, Kloeckner R, Weinmann-Menke J, and Müller L
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Purpose Sonography training has become an important part of university medicine courses. This study explores the impact of digital and analog teaching resources on learning outcomes, knowledge retention, and student preferences and motivation in a flipped classroom setting. Materials and Methods This prospective controlled study involving two groups of third-year medical students included a voluntary three-day compact ultrasound course given in a flipped classroom, comprising 26 teaching units of 45 minutes each. Hardcopy lecture notes (control group) and E-learning (study group) were used as teaching resources. Evaluations were conducted before (pre) and during the preparation phase (intermediate), and after (post) the face-to-face course. Likert scale responses, written theory tests with very short answer questions (Theorypre, Theoryinter, Theorypost), and practical examinations (Practiceinter, Practicepost) were used for student self-assessment and to measure attitude, motivation, as well as theoretical and practical skills. Results A total of N=236 complete data sets (study group n=136; control group n=100) were analyzed. Both groups showed an equivalent initial level of, and a continuous and significant (p<0.01) increase in, subjective and objective skills over the evaluated time frame. The study group achieved significantly (p<0.05) better results in Theoryinter, Theorypost, Practiceinter, and Practicepost. The study group evaluated their teaching resource and the training concept significantly (p<0.05) better. Conclusion The integration of digital resources into sonography education provides comparable learning outcomes to traditional analog materials, enhancing the preparatory phase. In the future, digitally supported training should be used more., Competing Interests: Conflict of Interest The authors declare that they have no conflict of interest., (The Author(s). This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial-License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commercial purposes, or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by-nc-nd/4.0/).)
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- 2024
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7. [Ultrasound supported identification of the ligamentum conicum in teaching head and neck sonography].
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Weimer AM, Weimer JM, Jonck C, Müller L, Stäuber M, Chrissostomou CD, Buggenhagen H, Klöckner R, Pirlich N, Künzel J, and Rink M
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Objective: Upper airway obstructions are usually acute emergencies. Coniotomy is the last option to secure the airway and can be supported by sonography. The aim of this study was to establish a training program to teach these skills., Material and Methods: The training consisted of theoretical training with an additional video presentation (10 minutes each) and practical training (45 minutes). Evaluations were completed before (T1) and after (T2) the training to measure prior experience and satisfaction with the training as well as subjective and objective competence levels. At T2, a practical test was also completed by n=113 participants. A standardized evaluation form was used to document the results of the practical test., Results: A large proportion of the participants had neither seen a coniotomy (64.6%) nor performed one independently (79.6%). Significant improvement (T1 to T2) was measured with regard to the subjective assessment of competence (p<0.001). The training received positive ratings for all items tested (scale ranges 1-2). During practical tests, the participants achieved an average of 89.2% of the possible points and needed a mean of 101 ±23 seconds to identify the conic ligament., Conclusion: Structured training for sonographic identification of the conic ligament leads to significant improvement in the subjective assessment of competence and a high objective competence level in a short period of time. This type of training should be standardized in head and neck ultrasound training in the future., Competing Interests: Julian Künzel: Berater- und Honorartätigkeit für GE Healthcare Alle weiteren Autoren geben an, dass kein Interessenkonflikt besteht., (Thieme. All rights reserved.)
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- 2024
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8. Shoulder and Knee Arthroscopy Access Point: Prospective Comparison of Sonographic and Palpatory Detection - Which Method is Better for Novices?
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Weimer AM, Weimer JM, Berthold S, Stein S, Müller L, Buggenhagen H, Balser G, Stankov K, Sgroi M, Schmidmaier G, Kloeckner R, and Schamberger C
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Purpose Arthroscopy is one of the most common interventions in orthopedics. Hence it is important to train users early in order to ensure the safest possible identification of access portals (AP). This prospective study aimed to compare a palpatory (PalpMethod) with a sonographic (SonoMethod) method for AP location in the shoulder and knee joints. Materials and Methods The study included trainee doctors (n=68) attending workshops (lasting approx. 90 minutes). In these workshops a teaching video initially demonstrated the PalpMethod and SonoMethod of AP identification. An experienced operator first marked the access portals on the test subject with a UV pen (determined ideal point [DIP]). Adhesive film was then affixed to the puncture regions. Subsequently participants marked on shoulders and knees first the point determined by palpation, then the point determined by sonography. Analysis involved DIP visualization with a UV lamp and employed a coordinate system around the central DIP. In addition, participants completed an evaluation before and after the workshop. Results The analysis included 324 measurements (n=163 shoulders and n= 161 knees). The majority of participants had not previously attended any courses on manual examination (87.9%) or musculoskeletal ultrasound (93.9%). Overall, the markings participants made on the shoulder using the SonoMethod were significantly closer to the DIP than those made by the PalpMethod (Palp 18.8mm ± 14.5mm vs. Sono 11.2mm ± 7.2mm; p<0.001). On the knee, however, the markings made by the PalpMethod were significantly closer to the DIP overall (Palp 8.0mm ± 3.2mm vs. Sono 12.8mm ± 5.2mm; p<0.001). Conclusion The results show that the SonoMethod produces more accurate markings on the shoulder, while the PalpMethod is superior for the knee., Competing Interests: Conflict of Intrest The authors declare that they have no conflict of interest., (The Author(s). This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial-License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commercial purposes, or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by-nc-nd/4.0/).)
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- 2024
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