Collating evidence to support the validation of a simulated laparotomy incision and closure-training model

It is essential to evaluate the functionality of surgical simulation models, in order to determine whether they perform as intended. In this study, we assessed the use of a simulated laparotomy incision and closure-training model by collating validity evidence to determine its utility as well as pre and post-test interval data. This was a quantitative study design, informed by Messick's unified validity framework. In total, 93 participants (surgical trainees ​= ​80, experts ​= ​13) participated in this study. Evaluation of content validity and the models' relationships with other variables was conducted, along with a pre and post-test confidence assessment. The model was deemed realistic and useful as a teaching tool, providing strong content validity evidence. In assessment of relationships with other variables, the expert group out-performed the novice group conclusively. Pre and post-test evaluation reported a statistically significant increase in confidence levels. We present strong validity evidence of a novel laparotomy incision and closure simulation-training model. •Abdominal wall entry and closure are core skills junior surgical trainees are expected to perform early on in training.•Proficiency through simulation-based education is desirable where possible prior to real patient encounters.•Evaluating surgical simulation training models for validity is important to ensure the model performs as required.•Our research demonstrates strong validity evidence to support this training model as a reliable and effective tool in surgical simulation training.