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Taxonomy of Instructions Given To Residents in Laparoscopic Cholecystectomy

Yuanyuan Feng, MS1, Christopher Wong, MS1, Helena Mentis, PhD1, Adrian Park, MD2. 1University of Maryland, Baltimore County, 2Anne Arundel Medical Center

Introduction

Laparoscopic simulation-based training has been focused on surgical skills training. The purpose of this study was to identify and categorize the explicit directional instructions made by attending surgeons to their residents in the OR in order to make recommendations for further simulation systems design. We hypothesize that OR-based laparoscopic surgery training is focused more on instructing residents in how to use the laparoscope and view the laparoscopic video.

Methods and Procedures

This study is based on video recordings of ten laparoscopic cholecystectomies. The cases included three different attending surgeons and three different PGY4 residents in different combinations of the two groups. These videos displayed both the external audio/video showing the interaction between the attending and the resident as well as the internal video captured by the laparoscopic recorder. The data analysis was focused on identifying and comparing explicit instructions given by attending surgeons to their assisting resident.

Results

Of the total 2269 instructions given in the ten cases observed, the guidance in the OR is categorized into two categories – the instrument-control guidance (42.04%) and the gaze guidance (57.96%). In the instrument-control guidance, attending surgeons provided instructions to residents on how to move surgical instruments, how to handle the instruments, and where to apply the instruments. In the gaze guidance, attending surgeons illustrated the exact points that residents should look on the laparoscopic video, sometimes using gestures pointing on the screen and often releasing their own instruments to point to the display.

The result of Wilcoxon signed-rank test on the frequencies of instructions normalized by the duration of each case shows that the frequency of gaze guidance is significantly higher than that of the instrument-control guidance (p=0.005), with a large effect size (r = 0.61) (Figure 1).

Boxplots of two categories of instructions

Figure 1. Boxplots of two categories of instructions

Conclusions

Our results present two major categories of instructions in OR-based laparoscopic training. These findings indicate that the focus of laparoscopic simulation training should include gaze guidance as well as skills guidance. Our findings could also suggest that novel approaches be designed to support gaze guidance by the attending in the OR. Finally, further steps can be taken to examine the physical and cognitive challenges for attending surgeons to show the residents what to see and the cognitive challenges for the residents in adopting the expert medical gaze during surgery.

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