Construct validation of a physical model colonsocopy simulator

Plooy, Annaliese M., Hill, Andrew, Horswill, Mark S., Cresp, Alanna St.G., Watson, Marcus O., Ooi, Soong-Yuan, Riek, Stephan, Wallis, Guy M., Burgess-Limerick, Robin and Hewett, David G. (2012) Construct validation of a physical model colonsocopy simulator. Gastrointestinal Endoscopy, 76 1: 144-150. doi:10.1016/j.gie.2012.03.246


Author Plooy, Annaliese M.
Hill, Andrew
Horswill, Mark S.
Cresp, Alanna St.G.
Watson, Marcus O.
Ooi, Soong-Yuan
Riek, Stephan
Wallis, Guy M.
Burgess-Limerick, Robin
Hewett, David G.
Title Construct validation of a physical model colonsocopy simulator
Journal name Gastrointestinal Endoscopy   Check publisher's open access policy
ISSN 0016-5107
1097-6779
Publication date 2012-07
Sub-type Article (original research)
DOI 10.1016/j.gie.2012.03.246
Volume 76
Issue 1
Start page 144
End page 150
Total pages 7
Place of publication Philadelphia, PA, United States
Publisher Mosby
Collection year 2013
Language eng
Formatted abstract
Background: Previous studies have demonstrated the construct validity of virtual reality colonoscopy simulators by showing that they can distinguish between users according to their level of endoscopic experience. Although physical model simulators are known to simulate looping more realistically than these devices, they lack published validation evidence.
Objective: To assess the construct validity of a physical model simulator, the Kyoto Kagaku Colonoscope Training Model (Kyoto Kagaku Co. Ltd, Kyoto, Japan) and to determine its suitability for assessing the insertion skill of trainee colonoscopists.
Design: Validation study; 21 experienced colonoscopists and 18 novices made 2 attempts at each of 4 standard cases on the Kyoto Kagaku physical model simulator, and we compared their performance on each case.
Setting: A medical simulation center in a large tertiary hospital.
Main Outcome Measurements: Completion rates, times to cecum, and peak forces applied to the colon model.
Results: Compared with novices, experienced colonoscopists had significantly higher completion to cecum rates and shorter times to cecum for each of the 4 cases (all P < .005). For 2 cases, experienced colonoscopists also exerted significantly lower peak forces than did novices (both P = .01).
Limitations: Two of the model's 6 “standard cases” were not included in the study.
Conclusions: The 4 cases included in the study have construct validity in that they can distinguish between the performance of experienced colonoscopists and novices, reproducing experienced/novice differences found in real colonoscopy. These cases can be used to validly assess the insertion skill of colonoscopy trainees.
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

 
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Created: Fri, 22 Jun 2012, 09:23:34 EST by Mr Andrew Hill on behalf of School of Psychology