Imperial College London
Alternate

Professor the Lord Darzi of Denham PC KBE FRS FMedSci HonFREng

Faculty of Medicine, Department of Surgery & Cancer

Co-Director of the IGHI, Professor of Surgery
 
 
 
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Contact

 

+44 (0)20 3312 1310a.darzi

 
 
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Location

 

Queen Elizabeth the Queen Mother Wing (QEQM)St Mary's Campus

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Summary

 

Publications

Citation

BibTex format

@article{Evans-Harvey:2020:10.1016/j.ijsu.2020.08.006,
author = {Evans-Harvey, K and Erridge, S and Karamchandani, U and Abdalla, S and Beatty, JW and Darzi, A and Purkayastha, S and Sodergren, MH},
doi = {10.1016/j.ijsu.2020.08.006},
journal = {International Journal of Surgery},
pages = {149--155},
title = {Comparison of surgeon gaze behaviour against objective skill assessment in laparoscopic cholecystectomy-a prospective cohort study},
url = {http://dx.doi.org/10.1016/j.ijsu.2020.08.006},
volume = {82},
year = {2020}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - BackgroundEye tracking technology may provide the basis of a novel, objective technical skill assessment in surgery. Past research has showed differences in the gaze patterns between expert and novice surgeons. The aim of this study was to investigate the relationship between gaze behaviors and technical skill during laparoscopic cholecystectomy as determined by objective assessment scores.MethodsGaze behaviors of surgeons performing laparoscopic cholecystectomies were mapped using wearable eye tracking apparatus. Two impartial surgeons retrospectively analyzed video footage of the procedure to perform Objective Structured Assessment of Technical Skill (OSATS) assessments. Primary endpoints were correlation between gaze behaviours (dwell time (%) and fixation frequency (count/s)) and OSATS scores. Dwell time was defined as the percentage of time spent fixating on particular visual areas of interest (AOI). Pearson's correlation coefficient was used to estimate the relationship between primary endpoints and AOIs. Statistical significance was set at p < 0.05.Results13 procedures were analyzed. Throughout all operative segments, a negative correlation was present between operating theatre dwell time and OSATS scores (p < 0.05). During dissection of Calot's triangle, there was a strong positive correlation between laparoscopic screen dwell time and OSATS scoring [r = 0.655, p < 0.05]. Scrub nurse dwell time during dissection of Calot's triangle showed a strong negative correlation with OSATS scoring [r = −0.619, p < 0.05]. During dissection of gallbladder fossa, operating theatre fixation frequency negatively correlated against OSATS scores [r = −0.566, p < 0.05].ConclusionThe results suggest a greater focus on significant visual stimuli alongside a lack of attention to non-essential stimuli during critical stages of the operative period is associated with greater technical skill. This aids the validation of eye tracking as an adjunct high-stak
AU  - Evans-Harvey,K
AU  - Erridge,S
AU  - Karamchandani,U
AU  - Abdalla,S
AU  - Beatty,JW
AU  - Darzi,A
AU  - Purkayastha,S
AU  - Sodergren,MH
DO  - 10.1016/j.ijsu.2020.08.006
EP  - 155
PY  - 2020///
SN  - 1743-9159
SP  - 149
TI  - Comparison of surgeon gaze behaviour against objective skill assessment in laparoscopic cholecystectomy-a prospective cohort study
T2  - International Journal of Surgery
UR  - http://dx.doi.org/10.1016/j.ijsu.2020.08.006
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000578011100033&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - https://www.sciencedirect.com/science/article/pii/S1743919120306051?via%3Dihub
UR  - http://hdl.handle.net/10044/1/85889
VL  - 82
ER  -
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