Abstract
Objective: To describe an ex vivo model for training LESS cholecystectomy. Method: The hepatobiliary complex of Sus scrofa domesticus placed in conventional “black boxes” was used. The capability of the model to allow practice of each step of the procedure was evaluated. We determined the impact of the practice in overcoming technical difficulties assessing the performance of two surgeons in five consecutive sessions, the time required to complete de task was evaluated.
Results: It is possible to perform each step of LESS cholecystectomy in the proposed training model. It allows post-graduate
residents practice and overcoming related difficulties. Conclusion: The proposed training model allows the practice
of LESS cholecystectomy.

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