Live animals for preclinical medical student surgical training.

Aims: The use of live animals for surgical training is a well-known, deliberated topic. However, medical students who use live animals rate the experience high not only in improving their surgical techniques, but also positively influencing their confidence levels in the operating room later in their careers. Therefore, we hypothesized that the use of live animal models is a unique and influential component of preclinical medical education.

Materials and methods: Medical student performed the following surgical procedures using mice; surgical orthotopic implantation of cancer cells into fat pad and subsequently a radical mastectomy. The improvement of skill was then analyzed.

Results: All cancer cell inoculations were performed successfully. Improvement of surgical skills during the radical mastectomy procedure was documented in all parameters. All wounds healed without breakdown or dehiscence. The appropriate interval between interrupted sutures was ascertained after fifth wound closure. The speed of interrupted sutures was doubled by last wound closure. The time required to complete a radical mastectomy decreased by almost half. A single animal died immediately following the operation due to inappropriate anesthesia, which was attributed to the lack of understanding of the overall operative management.

Conclusion: Surgical training using live animals for preclinical medical students provides a unique learning experience, not only in improving surgical skills but also and arguably most importantly, to introduce the student to the complexities of the perioperative environment in a way that most closely resembles the stress and responsibility that the operating room demands.