Introduction: The objective of this study is to describe a model of knee arthroscopy simulator that is affordable, low-cost and easily reproducible, aiming to enable the diffusion of more effective active teaching and training methodologies. Methods: For the creation of the arthroscopic camera, an endoscopic camera for mobile phones and computers model SXT-5.0M manufactured by KKMOON were used. The camera was introduced in a metal tube, which was coupled to a set of three 20 mm PVC hydraulic connectors to simulate the handle and sleeve of the arthroscope. The camera has a resolution of 1280 x 720 pixels and is equipped with six built-in white LED lamps, simulating and eliminating the need to use an additional light source. The knee model was developed using a PVC pipe fixed on a wooden support, to which synthetic femur and tibia models were affixed. Four three-centimeter diameter holes, compatible with the standard arthroscopic portals, were made in the body of the PVC pipe. For the menisci, a model was made out of modeling clay (Corfix®), until the anatomical structures were close to the real ones. The model consists of both menisci and the intercondylar eminence, simulating the proximal tibial articular surface. The model made out of modeling clay was the basis for the production of a thin Crystal Polyester Resin mold. Using the resin mold, the meniscal models were made of Silicone Rubber Type II, widely used in industry and crafts. Results: A functional and reproducible simulator was obtained, consisting of a knee model and an arthroscopic camera. The simulator works adequately adapted to a TV, monitor or computer, and allows the simulation of diagnostic procedures, meniscectomy and meniscoplasty. Conclusion: It is possible to develop a knee arthroscopy simulator, with components available in local and electronic commerce, at a cost of approximately R$ 300.

Resumo Objetivo Verificar a aplicabilidade e a concordância das regras do tornozelo de Ottawa aplicadas por estudantes de medicina e residentes de ortopedia em um serviço de trauma terciário, validando assim as regras de Ottawa para utilização em solo brasileiro. Método Estudo prospectivo, realizado em um hospital terciário, incluindo todos os pacientes com trauma torcional agudo da articulação tibiotársica. Os pacientes realizaram radiografias de tornozelo e/ou pé, tendo sido aplicado o questionário com as regras do tornozelo de Ottawa por acadêmicos e, na sequência, por residentes. As radiografias foram avaliadas por ortopedistas plantonistas e especialista em pé e tornozelo, sendo a opinião do especialista considerada padrão-ouro da análise. Resultados Foram avaliados 263 pacientes e, após aplicados os critérios de inclusão estabelecidos, restaram para a avaliação 226 casos. A sensibilidade para detectar lesões e o valor preditivo negativo (VPN) foi de 100%. O teste mais sensível e com maior VPN para ambos, acadêmicos e residentes, foi a palpação do maléolo lateral. O estudo apresentou potencial de redução de 30% no total de exames solicitados. Conclusão Os dados demostraram aplicabilidade e concordância entre acadêmicos e residentes, o que permite a validação do protocolo de Ottawa nos atendimentos de urgência e emergência no Brasil.

Introduction: The objective of this study is to describe a model of knee arthroscopy simulator that is affordable, low-cost and easily reproducible, aiming to enable the diffusion of more effective active teaching and training methodologies. Methods: For the creation of the arthroscopic camera, an endoscopic camera for mobile phones and computers model SXT-5.0M manufactured by KKMOON were used. The camera was introduced in a metal tube, which was coupled to a set of three 20 mm PVC hydraulic connectors to simulate the handle and sleeve of the arthroscope. The camera has a resolution of 1280 x 720 pixels and is equipped with six built-in white LED lamps, simulating and eliminating the need to use an additional light source. The knee model was developed using a PVC pipe fixed on a wooden support, to which synthetic femur and tibia models were affixed. Four three-centimeter diameter holes, compatible with the standard arthroscopic portals, were made in the body of the PVC pipe. For the menisci, a model was made out of modeling clay (Corfix®), until the anatomical structures were close to the real ones. The model consists of both menisci and the intercondylar eminence, simulating the proximal tibial articular surface. The model made out of modeling clay was the basis for the production of a thin Crystal Polyester Resin mold. Using the resin mold, the meniscal models were made of Silicone Rubber Type II, widely used in industry and crafts. Results: A functional and reproducible simulator was obtained, consisting of a knee model and an arthroscopic camera. The simulator works adequately adapted to a TV, monitor or computer, and allows the simulation of diagnostic procedures, meniscectomy and meniscoplasty. Conclusion: It is possible to develop a knee arthroscopy simulator, with components available in local and electronic commerce, at a cost of approximately R$ 300.