Construct validity of a novel, objective evaluation tool for the basics of open laparotomy training using a simulated model

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

BACKGROUND

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.

METHOD

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.

RESULTS

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.

CONCLUSION

We present strong validity evidence of a novel laparotomy incision and closure simulation-training model.

Use of a hybrid-abdominal wound simulated patient in the ACS/ASE medical student simulation skills curriculum

OBJECTIVE

We incorporated a hybrid-abdominal wound simulation to teach/assess the acquisition of three essential clinical skills in the ACS/ASE Medical Student Simulation-based Surgical Skills Curriculum.

METHOD

Third year students (N = 43) attended a workshop based on the ACS/ASE surgical skills curriculum for drain care/removal, staple removal and Steri-Strip application. Following a didactic session and demonstration using a simulated patient, student skill acquisition was assessed using the ACS/ASE module rating tool. Student interest/perceived usefulness of the workshop was evaluated using Keller's Motivational Survey.

RESULTS

We used median scores to identify low proficiency (n = 20; scores 17-28) and high proficiency (n = 23; scores 29-35) groups. The high proficiency group was more knowledgeable, performed better drain care, had a higher global score and was more confident than the low proficiency group. The students rated the workshop highly based on the Keller's Motivational Survey.

CONCLUSION

All students were proficient in the procedure tasks and communication skills and most felt that the course was beneficial. The ACS/ASE Medical Student Simulation-based Surgical Skills Curriculum was successfully integrated into our third year surgical clerkship.