Indian Journal of Dermatology
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DERMATOSURGERY ROUND
Year : 2014  |  Volume : 59  |  Issue : 2  |  Page : 169-175

Teaching elliptical excision skills to novice medical students: A randomized controlled study comparing low- and high-fidelity bench models


1 Department of Surgery, Botucatu Medical School, University of the State of São Paulo, Botucatu; Institute of Plastic and Craniofacial Surgery, Brazilian Society of Research and Assistance to Craniofacial Rehabilitation Hospital, Campinas, Brazil
2 Department of Statistics, Faculty of Technology, São Paulo State Technological Colleges, Marilia, SP, Brazil
3 Department of Surgery, Botucatu Medical School, University of the State of São Paulo, Botucatu, Brazil

Correspondence Address:
Rafael Denadai
Institute of Plastic and Craniofacial Surgery, Brazilian Society of Research and Assistance to Craniofacial Rehabilitation Hospital (SOBRAPAR), Francisco Bueno Lacerda, 250-112A, Campinas, São Paulo
Brazil
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/0019-5154.127679

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Background: The search for alternative and effective forms of training simulation is needed due to ethical and medico-legal aspects involved in training surgical skills on living patients, human cadavers and living animals. Aims : To evaluate if the bench model fidelity interferes in the acquisition of elliptical excision skills by novice medical students. Materials and Methods: Forty novice medical students were randomly assigned to 5 practice conditions with instructor-directed elliptical excision skills' training (n = 8): didactic materials (control); organic bench model (low-fidelity); ethylene-vinyl acetate bench model (low-fidelity); chicken legs' skin bench model (high-fidelity); or pig foot skin bench model (high-fidelity). Pre- and post-tests were applied. Global rating scale, effect size, and self-perceived confidence based on Likert scale were used to evaluate all elliptical excision performances. Results : The analysis showed that after training, the students practicing on bench models had better performance based on Global rating scale (all P < 0.0000) and felt more confident to perform elliptical excision skills (all P < 0.0000) when compared to the control. There was no significant difference (all P > 0.05) between the groups that trained on bench models. The magnitude of the effect (basic cutaneous surgery skills' training) was considered large (>0.80) in all measurements. Conclusion : The acquisition of elliptical excision skills after instructor-directed training on low-fidelity bench models was similar to the training on high-fidelity bench models; and there was a more substantial increase in elliptical excision performances of students that trained on all simulators compared to the learning on didactic materials.


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