• Marina Yiasemidou, Daniel Glassman, Khalid Khan, Justine Downing, Rangasamy Sivakumar, Adeshina Fawole, and Chandra Shekhar Biyani.
• Honorary Research Fellow, Leeds Institute of Biomedical and Clinical Sciences, University of Leeds, St. James University Hospital, Leeds, UK.
• Scot Med J. 2020 May 1; 65 (2): 46-51.

BackgroundAppendicitis is a commonly occurring condition worldwide. The gold standard treatment is appendicectomy. Although training models are commercially available for this procedure, they are often associated with high cost. Here we present a cost-effective model.AimTo establish construct validity of a cost-effective laparoscopic appendicectomy simulation model.MethodsThree groups of surgeons were recruited; novices (n = 31), of intermediate expertise (n = 13) and experts (n = 5) and asked to perform a simulated laparoscopic appendicectomy using the new model. Their performance was assessed by a faculty member and compared between the three groups using a validated scoring system (Global Operative Assessment of Laparoscopic Skills [GOALS] score).ResultsOne-way ANOVA test showed a significant difference in task performance between groups (p < 0.0001). Post-hoc comparisons after the application of Bonferroni correction (statistically significant p value <0.017) demonstrate a significant difference in performance between all groups for all GOALS categories as well as the total score. Effect size calculations showed that experience level had moderate (Eta-squared >0.5 and <0.8) and significant (>0.8) impact on the performance of the simulated procedure.ConclusionThe model described in this study is cost-effective, valid and can adequately simulate appendicectomy. The authors recommend inclusion of this model to postgraduate surgical training.

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