Introduction.

Simulation as an active learning strategy has become a student-centered tool for the construction of learning in safe environments and the improvement of their technical skills. The Objective Structured Assessment of Technical Skills (OSATS) is an evaluation tool in the surgical area, which can be implemented in microsurgery programs.

Methods.

Descriptive, cross-sectional and double-blind study, which included 34 students from surgical specialties, who were evaluated through the OSATS for the final modules: module 1: vascular dissection; module 2: execution of independent sutures; module 3: revascularization exercises. At the end of the course, the students evaluated the implementation of this methodology under evaluation by means of a satisfaction survey.

Results.

The evaluation of the design of the practical guide OSATS-type by the students was satisfactory (88.2%). When evaluating the dissection and suturing activity in microsurgery, they consider it very useful (88.2%), for anastomosis exercises and revascularization exercise (79.5% approval). The practical applicability and quality of the exercises using OSATS evaluation guides had 94.2% acceptance.

Conclusion.

The OSATS scales are a useful, valid and objective instrument for the evaluation model for technical skills, which can be implemented in simulation teaching models, with reliability, content and construct validity. It is applicable in microsurgery programs, with a positive perception by students.

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