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. 2007 Jun;245(6):992-9.
doi: 10.1097/01.sla.0000262780.17950.e5.

An evaluation of the feasibility, validity, and reliability of laparoscopic skills assessment in the operating room

Rajesh Aggarwal  1 , Teodor Grantcharov, Krishna Moorthy, Thor Milland, Pavlos Papasavas, Aristotelis Dosis, Fernando Bello, Ara Darzi
Affiliations

An evaluation of the feasibility, validity, and reliability of laparoscopic skills assessment in the operating room

Rajesh Aggarwal et al. Ann Surg. 2007 Jun.

Abstract

Objective: To assess the use of a synchronized video-based motion tracking device for objective, instant, and automated assessment of laparoscopic skill in the operating room.

Summary background data: The assessment of technical skills is fundamental to recognition of proficient surgical practice. It is necessary to demonstrate the validity, reliability, and feasibility of any tool to be applied for objective measurement of performance.

Methods: Nineteen subjects, divided into 13 experienced (performed >100 laparoscopic cholecystectomies) and 6 inexperienced (performed <10 LCs) surgeons completed LCs on 53 patients who all had a diagnosis of biliary colic. Each procedure was recorded with the ROVIMAS video-based motion tracking device to provide an objective measure of the surgeon's dexterity. Each video was also rated by 2 experienced observers on a previously validated operative assessment scale.

Results: There were significant differences for motion tracking parameters between the 2 groups of surgeons for the Calot triangle dissection part of procedure for time taken (P = 0.002), total path length (P = 0.026), and number of movements (P = 0.005). Both motion tracking and video-based assessment displayed intertest reliability, and there were good correlations between the 2 modes of assessment (r = 0.4 to 0.7, P < 0.01).

Conclusions: An instant, objective, valid, and reliable mode of assessment of laparoscopic performance in the operating room has been defined. This may serve to reduce the time taken for technical skills assessment, and subsequently lead to accurate and efficient audit and credentialing of surgeons for independent practice.

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Figures

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FIGURE 1. Time taken for experienced and novice surgeons to dissect Calot triangle. There was a significant difference between experienced and inexperienced groups (P = 0.002).
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FIGURE 2. Total path length for experienced and novice surgeons to dissect Calot triangle. There was a significant difference between experienced and inexperienced groups (P = 0.048).
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FIGURE 3. Total number of movements for experienced and novice surgeons to dissect Calot triangle. There was a significant difference between experienced and inexperienced groups (P = 0.007).
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FIGURE 4. Inter-rater reliability of OSATS global rating score between observer 1 and 2 (Cronbach's α = 0.72).
See this image and copyright information in PMC

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