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Gastrointest Endosc. 2014 Mar;79(3):490-7. doi: 10.1016/j.gie.2013.08.003. Epub 2013 Nov 7.

The Welsh Institute for Minimal Access Therapy colonoscopy suitcase has construct and concurrent validity for colonoscopic polypectomy skills training: a prospective, cross-sectional study.

Author information

1
Welsh Institute for Minimal Access Therapy, Cardiff, Wales, United Kingdom.
2
University Hospital Llandough, Cardiff, Wales, United Kingdom.
3
University Hospital of Wales, Wales, United Kingdom.
4
Cardiff University School of Medicine, Cardiff, Wales, United Kingdom.

Abstract

BACKGROUND:

The Welsh Institute for Minimal Access Therapy (WIMAT) colonoscopy suitcase is an ex vivo porcine simulator for polypectomy training.

OBJECTIVE:

To establish whether this model has construct and concurrent validity.

DESIGN:

Prospective, cross-sectional study.

SETTING:

Endoscopic training center.

PARTICIPANTS:

Twenty novice (N), 20 intermediate (I), 20 advanced (Ad), and 20 expert (E) colonoscopists.

INTERVENTION:

A simulated polypectomy task aimed at removing 2 polyps; A (simple), B (complex).

MAIN OUTCOME MEASUREMENTS:

Two accredited colonoscopists, blinded to group allocation, scored performances according to Direct Observation of Polypectomy Skills (DOPyS) assessment parameters. Group performances were compared. Real-life DOPyS scores were correlated to simulator DOPyS results.

RESULTS:

Median overall DOPyS scores for novices were 1.00 (1.00-1.87) for A and 0.50 (0.00-1.00) for B (A vs B; P < .01). Intermediates scored 2.50 (2.00-2.88) for A and 2.00 (1.13-2.50) for B (A vs B; P = .03). The advanced group scored 3.00 (2.50-3.50) for A and 2.50 (2.00-3.00) for B (A vs B; P = .01). Experts scored 3.00 (3.00-3.88) for A and 3.00 (2.50-3.50) for B (A vs B; P = .47). Intergroup comparisons for A were, N vs I; P < .01, N vs Ad; P < .01, N vs E; P < .01, I vs Ad; P < .01, I vs E; P < .01, and Ad vs E; P = .46. Intergroup comparisons for B were, N vs I; P < .01, N vs Ad; P < .01, N vs E; P < .01, I vs Ad; P = .03, I vs E; P <.01, and Ad vs E; P = .06. There was no difference between real-life DOPyS scores and simulator scores (0.07).

LIMITATIONS:

The model does not have inbuilt assessment parameters.

CONCLUSION:

This simulator demonstrates construct and concurrent validity for colon polypectomy training.

PMID:
24210655
DOI:
10.1016/j.gie.2013.08.003
[Indexed for MEDLINE]

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