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1.
Eur Radiol ; 33(4): 2927-2934, 2023 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-36350392

RESUMO

OBJECTIVES: Augmented reality (AR), which entails overlay of in situ images onto the anatomy, may be a promising technique for assisting image-guided interventions. The purpose of this study was to investigate and compare the learning experience and performance of untrained operators in puncture of soft tissue lesions, when using AR ultrasound (AR US) compared with standard US (sUS). METHODS: Forty-four medical students (28 women, 16 men) who had completed a basic US course, but had no experience with AR US, were asked to perform US-guided biopsies with both sUS and AR US, with a randomized selection of the initial modality. The experimental setup aimed to simulate biopsies of superficial soft tissue lesions, such as for example breast masses in clinical practice, by use of a turkey breast containing olives. Time to puncture(s) and success (yes/no) of the biopsies was documented. All participants completed questionnaires about their coordinative skills and their experience during the training. RESULTS: Despite having no experience with the AR technique, time to puncture did not differ significantly between AR US and sUS (median [range]: 17.0 s [6-60] and 14.5 s [5-41], p = 0.16), nor were there any gender-related differences (p = 0.22 and p = 0.50). AR US was considered by 79.5% of the operators to be the more enjoyable means of learning and performing US-guided biopsies. Further, a more favorable learning curve was achieved using AR US. CONCLUSIONS: Students considered AR US to be the preferable and more enjoyable modality for learning how to obtain soft tissue biopsies; however, they did not perform the biopsies faster than when using sUS. KEY POINTS: • Performance of standard and augmented reality US-guided biopsies was comparable • A more favorable learning curve was achieved using augmented reality US. • Augmented reality US was the preferred technique and was considered more enjoyable.


Assuntos
Realidade Aumentada , Estudantes de Medicina , Masculino , Humanos , Feminino , Aprendizagem , Ultrassonografia , Ultrassonografia de Intervenção
2.
Calcif Tissue Int ; 99(3): 310-21, 2016 09.
Artigo em Inglês | MEDLINE | ID: mdl-27167138

RESUMO

Bimagrumab (BYM338) is a novel fully human monoclonal antibody that exerts strong promyogenic effects on skeletal muscle by blocking activin type II receptors (ActRII). We investigated whether such blockade of ActRII by bimagrumab manifests any detrimental effect on outcomes of bone healing in a rat fibula osteotomy model. Animals (n = 150) were divided into 11 groups and received weekly treatment with either bimagrumab (10 or 100 mg/kg) or vehicle. Progression and outcomes of bone healing were assessed by lateral radiographs in vivo as well as by peripheral quantitative computed tomography (pQCT), 4-point bending test, and microscopic examination of the excised fibula at Day 29 or later. The radiographic progression of bone healing showed no significant differences between treatment groups in any comparative setting. In 3-month-old animals, pQCT revealed slightly reduced immature callus size and bone mineral content in bimagrumab-treated animals compared with vehicle-treated animals at Day 29 (p < 0.05). There were, however, no differences in mature callus size, bone mineral density, or biomechanical competency. The aforementioned effects on immature callus size were not present when the treatment was initiated 4 weeks post osteotomy or when treating 6-month-old animals. In summary, these findings suggest that there is no major impact of ActRII blockade on overall fracture healing, and delayed treatment initiation can bypass the small and transient effect of the therapy on immature callus formation observed in younger animals. Verification of these findings in humans is the subject of an ongoing clinical trial on elderly hip fracture patients.


Assuntos
Receptores de Ativinas/efeitos dos fármacos , Anticorpos Bloqueadores/farmacologia , Anticorpos Monoclonais/farmacologia , Densidade Óssea/efeitos dos fármacos , Fíbula/efeitos dos fármacos , Fraturas Ósseas/tratamento farmacológico , Receptores de Ativinas/metabolismo , Animais , Anticorpos Monoclonais Humanizados , Fenômenos Biomecânicos/efeitos dos fármacos , Calo Ósseo/efeitos dos fármacos , Consolidação da Fratura/efeitos dos fármacos , Masculino , Osteotomia/métodos , Ratos Sprague-Dawley
3.
J Hand Ther ; 29(4): 451-458, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-27769842

RESUMO

STUDY DESIGN: Bench research-biomechanical study. INTRODUCTION: Static progressive orthotic devices are efficient in treating contractures. However, current outriggers are unable to keep force transmission and the force application angle (FAA) constant. PURPOSE OF THE STUDY: To evaluate the biomechanical performance of the Isoforce outrigger, a novel extension orthosis. METHODS: A hand model was used to measure the required force at the outrigger and FAA, while simulating resolution of different contracture angles. We also tested feasibility in a small patient series. RESULTS: The force required with the Isoforce device never exceeded 2.4 N, and the FAA did not change more than 6°. Corresponding figures for the reference devices exceeded 16 N and 20°. The 7 patients testing the Isoforce extension device showed an extension deficit that decreased from 40° at baseline to 25° at 6 weeks. They rated the device as very comfortable to wear. CONCLUSIONS: Isoforce maintains constant force transmission and FAA throughout the full range of motion, promotes the lengthening of contracted structures, and is comfortable to wear. LEVEL OF EVIDENCE: Not applicable.


Assuntos
Desenho de Equipamento/métodos , Modelos Anatômicos , Aparelhos Ortopédicos/estatística & dados numéricos , Dedo em Gatilho/reabilitação , Fenômenos Biomecânicos , Humanos , Amplitude de Movimento Articular/fisiologia
4.
Arch Orthop Trauma Surg ; 134(2): 197-205, 2014 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-23728832

RESUMO

INTRODUCTION: Lack of standardization of outcome measurement has hampered an evidence-based approach to clinical practice and research. METHODS: We adopted a process of reviewing evidence on current use of measures and appropriate theoretical frameworks for health and disability to inform a consensus process that was focused on deriving the minimal set of core domains in distal radius fracture. RESULTS: We agreed on the following seven core recommendations: (1) pain and function were regarded as the primary domains, (2) very brief measures were needed for routine administration in clinical practice, (3) these brief measures could be augmented by additional measures that provide more detail or address additional domains for clinical research, (4) measurement of pain should include measures of both intensity and frequency as core attributes, (5) a numeric pain scale, e.g. visual analogue scale or visual numeric scale or the pain subscale of the patient-reported wrist evaluation (PRWE) questionnaires were identified as reliable, valid and feasible measures to measure these concepts, (6) for function, either the Quick Disability of the arm, shoulder and hand questionnaire or PRWE-function subscale was identified as reliable, valid and feasible measures, and (7) a measure of participation and treatment complications should be considered core outcomes for both clinical practice and research. CONCLUSION: We used a sound methodological approach to form a comprehensive foundation of content for outcomes in the area of distal radius fractures. We recommend the use of symptom and function as separate domains in the ICF core set in clinical research or practice for patients with wrist fracture. Further research is needed to provide more definitive measurement properties of measures across all domains.


Assuntos
Avaliação de Resultados em Cuidados de Saúde/normas , Fraturas do Rádio/cirurgia , Medicina Baseada em Evidências , Humanos , Classificação Internacional de Funcionalidade, Incapacidade e Saúde , Masculino , Medição da Dor/normas , Fraturas do Rádio/fisiopatologia , Padrões de Referência , Reprodutibilidade dos Testes , Inquéritos e Questionários , Traumatismos do Punho/fisiopatologia , Traumatismos do Punho/cirurgia
5.
Arch Orthop Trauma Surg ; 134(2): 269-75, 2014 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-21901558

RESUMO

INTRODUCTION: The documentation of complications is critical for the evaluation of therapeutic interventions in orthopedics. However, there is a lack of accepted methodological standardization and definitions. We propose a concept to support the consensus development of a standardized management and classification of complications in clinical research. METHODS: Complication events are examined regarding their clinical presentation, their timing of occurrence as well as their potential causal interrelationship for any given patient. Their clinical presentation is distinguished by their likely triggers, their therapeutic management, and their outcome. Complications are events (including relevant deviations from their expected healing process) that are harmful to patients and can be described as local to the treated injury/disease or systemic (when they affect the rest of the body). The treatment of a complication, e.g. by way of an unplanned surgical intervention, and its outcome should be carefully documented. Complication review boards with independent clinicians should be established to validate complication records. APPLICATION AND RELEVANCE: In this proposal, a number of complication examples are presented to illustrate the concept and demonstrate its practical use. This management and classification system has already proven valuable in the documentation and analysis of complication data from a number of published clinical studies. Because of this new standardized assessment process, it facilitates the communication of complications between clinicians and researchers, and helps to develop clear definitions for specific orthopedic complications.


Assuntos
Ensaios Clínicos como Assunto/normas , Documentação/normas , Procedimentos Ortopédicos/efeitos adversos , Humanos , Complicações Pós-Operatórias/epidemiologia , Projetos de Pesquisa , Fraturas do Ombro/cirurgia
6.
Arch Orthop Trauma Surg ; 133(5): 589-93, 2013 May.
Artigo em Inglês | MEDLINE | ID: mdl-23417083

RESUMO

The use of patient-reported outcome questionnaires is recommended in studies of the orthopaedic field. Reliable, validated tools are necessary to ensure the comparability of results across different studies, centers, and countries. The patient-rated wrist evaluation (PRWE) is a widely accepted and commonly used outcome measure in the self-evaluation after distal radius fractures. The cross-cultural adaptation of PRWE was performed according to international guidelines, following prescribed six stages: translation, synthesis, back-translation, expert committee review, pre-testing, and submission of documentation. PRWE versions were achieved without any substantive difficulty in all seven languages. Cross-cultural adaptation aims "to attain semantic, idiomatic, experiential and conceptual equivalence between the source and target questionnaires". The present paper provides such adaptation of the PRWE in seven different languages, making this tool available for an additional nearly half a billion potential users.


Assuntos
Competência Cultural , Avaliação da Deficiência , Fraturas do Rádio/terapia , Traumatismos do Punho/terapia , Articulação do Punho , Atividades Cotidianas , Comparação Transcultural , Autoavaliação Diagnóstica , Humanos , Avaliação de Resultados em Cuidados de Saúde , Recuperação de Função Fisiológica , Inquéritos e Questionários
7.
Arch Orthop Trauma Surg ; 133(10): 1415-24, 2013 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-23864158

RESUMO

INTRODUCTION: Although replacement of the elbow joint is a complex procedure there is not much clinical evidence that contributes to surgical decision-making, mainly due to small clinical samples and short follow-up. Therefore, we performed a long-term analysis up to 30 years after implantation of a GSB III total elbow prosthesis to quantify long-term outcome and to identify possible risk factors for implant revision. MATERIALS AND METHODS: All patients who received a primary GSB III total elbow prosthesis between 1978 and 1998 were included. Information about patient characteristics, the latest known implant status and possible risk factors were collected, Kaplan-Meier survival curves plotted, and 10- and 20-year survival calculated. The cohort was stratified for known risk factors such as diagnosis, age, or gender and included in a Cox regression analysis. RESULTS: A total of 253 patients [mean age at operation 56.9 years (range from 17.5 to 84 years)] with 293 GSB III prostheses were included. The median follow-up was 9.1 years (0 months to 29.3 years). Whereas 81 prostheses did not need revision during the observation period, 76 had been implanted in patients who died before any revision was required, and 75 had not been revised by the last known follow-up. 61 prostheses were revised. This corresponds to a 10-year survival rate of 0.8 (95 % CI 0.74-0.85) and a 20-year rate of 0.67 (95 % CI 0.57-0.76). Prostheses in patients with post-traumatic conditions survived significantly shorter than those in patients with rheumatoid arthritis; previous operations lead to a 2.8 times greater risk of revision (p = 0.004). Neither age at implantation nor gender had a significant influence on prosthesis survival. CONCLUSIONS: The results indicate a good long-term prognosis for this design. The prognosis has to be adjusted for the underlying disease. Previous operations such as joint reconstruction significantly increase the risk of revision.


Assuntos
Artrite Reumatoide/cirurgia , Artroplastia de Substituição do Cotovelo/instrumentação , Prótese de Cotovelo , Osteoartrite/cirurgia , Falha de Prótese , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Artroplastia de Substituição do Cotovelo/métodos , Feminino , Seguimentos , Humanos , Estimativa de Kaplan-Meier , Masculino , Pessoa de Meia-Idade , Modelos de Riscos Proporcionais , Reoperação , Fatores de Risco , Resultado do Tratamento , Adulto Jovem
8.
Front Psychol ; 14: 1214091, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-37701867

RESUMO

The ability to team up and safely work in any kind of healthcare team is a critical asset and should be taught early on in medical education. Medical students should be given the chance to "walk the talk" of teamwork by training and reflecting in teams. Our goal was to design, implement and evaluate the feasibility of a simulation-based teamwork training (TeamSIM) for undergraduate medical students that puts generic teamwork skills centerstage. We designed TeamSIM to include 12 learning objectives. For this pre-post, mixed-methods feasibility study, third-year medical students, organized in teams of 11-12 students, participated and observed each other in eight simulations of different clinical situation with varying degrees of complexity (e.g., deteriorating patient in ward; trauma; resuscitation). Guided by an interprofessional clinical faculty with simulation-based instructor training, student teams reflected on their shared experience in structured team debriefings. Using published instruments, we measured (a) students' reactions to TeamSIM and their perceptions of psychological safety via self-report, (b) their ongoing reflections via experience sampling, and (c) their teamwork skills via behavior observation. Ninety four students participated. They reported positive reactions to TeamSIM (M = 5.23, SD = 0.5). Their mean initial reported level of psychological safety was M = 3.8 (SD = 0.4) which rose to M = 4.3 (SD = 0.5) toward the end of the course [T(21) = -2.8, 95% CI -0.78 to-0.12, p = 0.011 (two-tailed)]. We obtained n = 314 headline reflections from the students and n = 95 from the faculty. For the students, the most frequent theme assigned to their headlines involved the concepts taught in the course such as "10 s for 10 min." For the faculty, the most frequent theme assigned to their headlines were reflections on how their simulation session worked for the students. The faculty rated students' teamwork skills higher after the last compared to the first debriefing. Undergraduate medical students can learn crucial teamwork skills in simulations supported by an experienced faculty and with a high degree of psychological safety. Both students and faculty appreciate the learning possibilities of simulation. At the same time, this learning can be challenging, intense and overwhelming. It takes a team to teach teamwork.

9.
Drug Discov Today ; 28(2): 103457, 2023 02.
Artigo em Inglês | MEDLINE | ID: mdl-36427777

RESUMO

Digital health and digital pharma are considered supportive tools for patients and healthcare providers (HCPs), making the market highly attractive for industry players. Not surprisingly, Tech Giants have started to move into this area. We utilized established management models and publicly available information sources, such as annual company reports, and performed a thorough analysis to uncover the underlying business models of Alphabet, Amazon, Apple, IBM, and Microsoft in order to better understand their intention and course of entering the healthcare and pharma industries. Our results indicate that Big Tech or Tech Giants do address the needs of patients and physicians, while having built clear value propositions, value chains, and revenue models to sustainably revolutionize the healthcare and pharma industries.


Assuntos
Atenção à Saúde , Indústria Farmacêutica , Humanos , Comércio
10.
Digit Biomark ; 7(1): 45-53, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-37404865

RESUMO

Introduction: Digital health technologies (DHTs) provide opportunities for real-time data collection and assessment of patient function. However, use of DHT-derived endpoints in clinical trials to support medical product labelling claims is limited. Methods: From November 2020 through March 2021, the Clinical Trials Transformation Initiative (CTTI) conducted a qualitative descriptive study using semi-structured interviews with sponsors of clinical trials that used DHT-derived endpoints. We aimed to learn about their experiences, including their interactions with regulators and the challenges they encountered. Using applied thematic analysis, we identified barriers to and recommendations for using DHT-derived endpoints in pivotal trials. Results: Sponsors identified five key challenges to incorporating DHT-derived endpoints in clinical trials. These included (1) a need for additional regulatory clarity specific to DHT-derived endpoints, (2) the official clinical outcome assessment qualification process being impractical for the biopharmaceutical industry, (3) a lack of comparator clinical endpoints, (4) a lack of validated DHTs and algorithms for concepts of interest, and (5) a lack of operational support from DHT vendors. Discussion/Conclusion: CTTI shared the interview findings with the US Food and Drug Administration (FDA) and the European Medicines Agency (EMA) and during a multi-stakeholder expert meeting. Based on these discussions, we provide several new and revised tools to aid sponsors in using DHT-derived endpoints in pivotal trials to support labelling claims.

11.
Trends Biotechnol ; 41(9): 1113-1116, 2023 09.
Artigo em Inglês | MEDLINE | ID: mdl-36822913

RESUMO

A real-time, noninvasive, and clinically applicable aging test in humans has yet to be established. Herein we propose a sweat- and wearable-based test to determine biological age. This test would empower users to monitor their aging process and take an active role in managing their lifestyle and health.


Assuntos
Técnicas Biossensoriais , Dispositivos Eletrônicos Vestíveis , Humanos , Suor
12.
Swiss Med Wkly ; 153: 40088, 2023 06 30.
Artigo em Inglês | MEDLINE | ID: mdl-37410895

RESUMO

Breakthroughs in medical research in the last century have led to a significant extension of the human lifespan, resulting in a shift towards an elderly population worldwide. Due to the ongoing progress of global development towards elevated standards of living, this study specifically examines Switzerland as a representative nation to explore the socioeconomic and healthcare ramifications associated with an ageing population, thereby highlighting the tangible impact experienced in this context. Beyond the exhaustion of pension funds and medical budgets, by reviewing the literature and analysing publicly available data, we observe a "Swiss Japanification". Old age is associated with late-life comorbidities and an increasing proportion of time spent in poor health. To address these problems, a paradigm shift in medical practice is needed to improve health rather than respond to existing diseases. Basic ageing research is gaining momentum to be translated into therapeutic interventions and provides machine learning tools driving longevity medicine. We propose that research focus on closing the translational gap between the molecular mechanisms of ageing and a more prevention-based medicine, which would help people age better and prevent late-life chronic diseases.


Assuntos
Envelhecimento , Longevidade , Humanos , Idoso , Suíça , Atenção à Saúde , Doença Crônica
13.
Lancet Infect Dis ; 23(10): e445-e453, 2023 10.
Artigo em Inglês | MEDLINE | ID: mdl-37348517

RESUMO

The silent pandemic of bacterial antimicrobial resistance is a leading cause of death worldwide, prolonging hospital stays and raising health-care costs. Poor incentives to develop novel pharmacological compounds and the misuse of antibiotics contribute to the bacterial antimicrobial resistance crisis. Therapeutic drug monitoring (TDM) based on blood analysis can help alleviate the emergence of bacterial antimicrobial resistance and effectively decreases the risk of toxic drug concentrations in patients' blood. Antibiotic tissue penetration can vary in patients who are critically or chronically ill and can potentially lead to treatment failure. Antibiotics such as ß-lactams and glycopeptides are detectable in non-invasively collectable biofluids, such as sweat and exhaled breath. The emergence of wearable sensors enables easy access to these non-invasive biofluids, and thus a laboratory-independent analysis of various disease-associated biomarkers and drugs. In this Personal View, we introduce a three-level model for TDM of antibiotics to describe concentrations at the site of infection (SOI) by use of wearable sensors. Our model links blood-based drug measurement with the analysis of drug concentrations in non-invasively collectable biofluids stemming from the SOI to characterise drug concentrations at the SOI. Finally, we outline the necessary clinical and technical steps for the development of wearable sensing platforms for SOI applications.


Assuntos
Anti-Infecciosos , Infecções Bacterianas , Doenças Transmissíveis , Humanos , Monitoramento de Medicamentos , Antibacterianos/farmacologia , Anti-Infecciosos/uso terapêutico , beta-Lactamas , Doenças Transmissíveis/tratamento farmacológico , Infecções Bacterianas/tratamento farmacológico
14.
Digit Biomark ; 7(1): 28-44, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-37206894

RESUMO

Background: Digital measures offer an unparalleled opportunity to create a more holistic picture of how people who are patients behave in their real-world environments, thereby establishing a better connection between patients, caregivers, and the clinical evidence used to drive drug development and disease management. Reaching this vision will require achieving a new level of co-creation between the stakeholders who design, develop, use, and make decisions using evidence from digital measures. Summary: In September 2022, the second in a series of meetings hosted by the Swiss Federal Institute of Technology in Zürich, the Foundation for the National Institutes of Health Biomarkers Consortium, and sponsored by Wellcome Trust, entitled "Reverse Engineering of Digital Measures," was held in Zurich, Switzerland, with a broad range of stakeholders sharing their experience across four case studies to examine how patient centricity is essential in shaping development and validation of digital evidence generation tools. Key Messages: In this paper, we discuss progress and the remaining barriers to widespread use of digital measures for evidence generation in clinical development and care delivery. We also present key discussion points and takeaways in order to continue discourse and provide a basis for dissemination and outreach to the wider community and other stakeholders. The work presented here shows us a blueprint for how and why the patient voice can be thoughtfully integrated into digital measure development and that continued multistakeholder engagement is critical for further progress.

15.
Front Immunol ; 14: 1158905, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-37313411

RESUMO

The severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) induces B and T cell responses, contributing to virus neutralization. In a cohort of 2,911 young adults, we identified 65 individuals who had an asymptomatic or mildly symptomatic SARS-CoV-2 infection and characterized their humoral and T cell responses to the Spike (S), Nucleocapsid (N) and Membrane (M) proteins. We found that previous infection induced CD4 T cells that vigorously responded to pools of peptides derived from the S and N proteins. By using statistical and machine learning models, we observed that the T cell response highly correlated with a compound titer of antibodies against the Receptor Binding Domain (RBD), S and N. However, while serum antibodies decayed over time, the cellular phenotype of these individuals remained stable over four months. Our computational analysis demonstrates that in young adults, asymptomatic and paucisymptomatic SARS-CoV-2 infections can induce robust and long-lasting CD4 T cell responses that exhibit slower decays than antibody titers. These observations imply that next-generation COVID-19 vaccines should be designed to induce stronger cellular responses to sustain the generation of potent neutralizing antibodies.


Assuntos
COVID-19 , Humanos , Vacinas contra COVID-19 , SARS-CoV-2 , Anticorpos Neutralizantes , Aprendizado de Máquina
16.
J Shoulder Elbow Surg ; 21(8): 992-1000, 2012 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-22221886

RESUMO

BACKGROUND: The goal of this study was to investigate the outcome of different surgical procedures (debridement and retention vs 1- or 2-stage exchange) together with a well-defined antimicrobial regimen. MATERIALS AND METHODS: A total of 236 consecutive patients underwent 262 primary elbow arthroplasties between January 1994 and December 2007. We observed 20 episodes of periprosthetic infections in 19 patients and placed them into 3 groups according to the occurrence of infection after index surgery. A total of 9 early infections (<3 months), 1 delayed infection (3-24 months), and 10 late infections (>24 months) were observed. The treatment among those 3 groups was compared, and the outcome was assessed with a mean follow-up of 60.2 months. RESULTS: In the group with early infections (n = 9), 8 cases were treated by irrigation and debridement and 1 case was treated by a 2-stage exchange without recurrence of infection. The mean Mayo Elbow Performance Score improved from 48.3 points (range, 30-75 points) to 91.7 points (range, 85-100 points). The delayed infection was treated by 1-stage exchange without recurrence of infection. For late infections (n = 10), 3 cases presented recurrence of infection after debridement and irrigation, and the mean Mayo Elbow Performance Score remained nearly unchanged, from 60 points (range, 45-80 points) to 65 points (range, 50-80 points). Eradication of infection could be achieved by staged revision and in 3 cases by debridement. CONCLUSION: Both debridement with retention and staged reimplantation are highly successful for appropriate indications. Staged revisions are successful even against biofilm-active microorganisms, but a prosthesis-free interval of at least 3 months is recommended.


Assuntos
Antibacterianos/uso terapêutico , Artroplastia de Substituição do Cotovelo/efeitos adversos , Desbridamento/métodos , Prótese de Cotovelo , Infecções Relacionadas à Prótese/terapia , Adulto , Idoso , Idoso de 80 Anos ou mais , Artrite Reumatoide/diagnóstico , Artrite Reumatoide/cirurgia , Artroplastia de Substituição do Cotovelo/métodos , Estudos de Coortes , Remoção de Dispositivo , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Osteoartrite/diagnóstico , Osteoartrite/cirurgia , Medição da Dor , Prognóstico , Infecções Relacionadas à Prótese/diagnóstico , Infecções Relacionadas à Prótese/epidemiologia , Amplitude de Movimento Articular/fisiologia , Recidiva , Reoperação/métodos , Estudos Retrospectivos , Medição de Risco , Índice de Gravidade de Doença , Irrigação Terapêutica/métodos , Resultado do Tratamento
17.
Foot Ankle Int ; 33(10): 883-92, 2012 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-23050714

RESUMO

BACKGROUND: Understanding the functionality of total ankle arthroplasties (TAA) requires thorough knowledge of the kinematics during activities of daily life. Videofluoroscopy enables the in vivo measurement of the 3D kinematics of implant components more accurately than by means of skin marker tracking. The aim of the present preliminary study was to quantify the 3D kinematics of a TAA during the stance phase of level and slope walking using single plane videofluoroscopy. METHODS: The experimental set up consisted of a videofluoroscopy system (BV Pulsera, Philips Medical Systems, Switzerland, 25 Hz, 1 ms shutter time) integrated in a walkway, allowing the assessment of free level gait, uphill, downhill and cross-slope walking. 2D/3D registration was performed using the CAD models of the TAA. In a preliminary feasibility study, the presented method was applied on four patients with successful unilateral TAA (Mobility™ Total Ankle, DePuy) with good outcomes. RESULTS: Isolated 3D TAA kinematics was quantified with a rotational and translational error of 0.2 degrees and 0.4 mm in plane and 1.3 degrees and 2.1 mm out of plane. In the feasibility study it was found that only minor limitations occurred in sagittal plane motion. Any restrictions were caused by a limitation in dorsiflexion, whereas plantarflexion was for all gait conditions sufficiently provided. Transverse and frontal plane rotation was marginal, the main rotation occurred around the talar construction axis itself. CONCLUSION: The presented method enabled accurate estimation of the 3D TAA kinematics in vivo, without being limited by skin movement artifacts and isolated from subtalar motion. Since the available amount of dorsiflexion is the crucial factor to allow unrestrictive gait, walking uphill is an appropriate motion task to challenge and evaluate the performance of the TAA. CLINICAL RELEVANCE: The presented method has the potential to identify specific kinematic patterns and thereby help clinicians and implant developers to evaluate current designs and future design modifications.


Assuntos
Articulação do Tornozelo/fisiologia , Artroplastia de Substituição do Tornozelo , Fluoroscopia , Imageamento Tridimensional , Caminhada/fisiologia , Fenômenos Biomecânicos , Desenho Assistido por Computador , Estudos de Viabilidade , Marcha/fisiologia , Humanos , Masculino , Pessoa de Meia-Idade , Amplitude de Movimento Articular/fisiologia , Gravação em Vídeo
18.
J Hand Ther ; 25(4): 387-95; quiz 396, 2012.
Artigo em Inglês | MEDLINE | ID: mdl-22796007

RESUMO

INTRODUCTION: Patients with hand disorders frequently experience difficulties opening peelable packaging. PURPOSE: To investigate the forces patients can apply to tear tabs and to compare the results with normative data to make recommendations for the industry and clinical practice. STUDY DESIGN: Descriptive, cross-sectional. METHODS: One hundred patients with hand disorders were studied. The pinch pull force (PPF) applied to tear tabs of different lengths and materials (aluminum, plastic) was measured with a specially designed device. Key pinch was measured with a pinch gauge. Normative data were taken from another study on 402 healthy adults. RESULTS: Patients were able to apply most force to the longest aluminum tab, using the key grip, but this was only 53% of the force exerted by healthy people. Key pinch determines PPF (R(2)=0.548, p≤0.001). CONCLUSIONS: Manufacturers should provide long aluminum tear tabs. Health professionals are encouraged to measure key pinch to detect difficulties in opening packages. LEVEL OF EVIDENCE: Level IV.


Assuntos
Força da Mão/fisiologia , Mãos/fisiopatologia , Doenças Musculoesqueléticas/fisiopatologia , Embalagem de Produtos , Adulto , Idoso , Idoso de 80 Anos ou mais , Estudos Transversais , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Adulto Jovem
19.
MedEdPublish (2016) ; 12: 61, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-36817616

RESUMO

Background: Despite acquiring vast content knowledge about the functioning of the human body through university teaching, medical students struggle to transfer that knowledge to one of the core disciplinary practices - differential diagnosis. The authors aimed to overcome this problem by implementing computer-based virtual environment simulations in medical education courses. Methods: In an experimental study, the authors compared problem-solving in medical computer-based virtual environment simulations prior to instruction with an instruction-first approach. They compared the effects on isomorphic testing and transfer performance of clinical knowledge and clinical reasoning skills as well as evoked learning mechanisms. The study took place in spring 2021 with undergraduate medical students in the scope of a medical trajectory course. Due to Corona-Virus-19 measures participants completed all study activities remotely from home. Results: The authors did not find any learning activity sequence to be superior to the other. However, when looking at the two learning activities individually, they found that problem-solving in computer-based virtual environment simulations and direct instruction might be equally effective for learning content knowledge. Nevertheless, problem-solving in computer-based virtual environment simulations with formative feedback might be more effective for learning clinical reasoning skills than mere instruction. Conclusions: The findings indicate that problem-solving in computer-based virtual environment simulations might be more effective for learning clinical reasoning skills than mere theoretical instruction. The present study has a high level of ecological validity because it took place in a realistic setting where students had to perform all learning and testing tasks autonomously.

20.
Praxis (Bern 1994) ; 110(1): 26-31, 2022 Jan.
Artigo em Alemão | MEDLINE | ID: mdl-34983207

RESUMO

Teaching Interprofessional Patient Pathways in Medical Education in Switzerland - A Collaboration of Multiple Players Abstract. The increase of chronic and complex medical disorders challenges actors in the health care system and affects the entire health care system in Switzerland. Through an interprofessional exchange between medical and health care professionals, the individual needs of patients can be better addressed, which has a positive impact on patients' treatments. To prepare students of the Bachelor of Medicine at ETH Zurich for these challenges, the ETH has designed a specific course together with four educational institutions, which is oriented towards the interprofessional, patient-centred supply chain. The aim of this interprofessional module is, that Bachelor of Medicine students, as well as Pharmacy and Nursing students, acquire knowledge about the other areas of responsibility and competences, and at the same time get to know the interfaces of interprofessional cooperations.


Assuntos
Educação Médica , Medicina , Estudantes de Medicina , Currículo , Humanos , Suíça
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