Visual control strategies of surgeons: a novel method of establishing the construct validity of a transurethral resection of the prostate surgical simulator

2.50
Hdl Handle:
http://hdl.handle.net/11287/593852
Title:
Visual control strategies of surgeons: a novel method of establishing the construct validity of a transurethral resection of the prostate surgical simulator
Authors:
Bright, Elizabeth; Vine, S. J.; Dutton, Thomas; Wilson, M. R.; McGrath, John S
Abstract:
OBJECTIVE: To examine novice and expert differences in visual control strategies while performing a virtual reality transurethral resection of the prostate (TURP) task and to determine if these differences could provide a novel method for assessing construct validity of the simulator. SUBJECTS AND METHODS: A total of 11 novices (no TURP experience) and 7 experts (>200 TURPs) completed a virtual reality prostate resection task on the TURPsim (Simbionix USA Corp, Cleveland, OH) while wearing an eye tracker (ASL, Bedford, MA). Performance parameters and the surgeon's visual control strategy were measured and compared between the 2 groups. RESULTS: Experts resected a greater percentage of prostate than novices (p < 0.01) and had less active diathermy time without tissue contact (p < 0.01). Experts adopted a target-locking visual strategy, employing fewer visual fixations (p < 0.05) with longer mean fixation duration (p < 0.005). With multiple learning trials, novices' performance improved and the adoption of a more expertlike gaze strategy was observed. CONCLUSION: Significant differences between experts and novices in both performance and visual control strategy were observed. The study of visual control strategies may be a useful adjunct, alongside measurements of motor performance, providing a novel method of assessing the construct validity of surgical simulators.
Citation:
J Surg Educ. 2014 May-Jun;71(3):434-9.
Publisher:
Elsevier
Journal:
Journal of surgical education
Issue Date:
1-May-2014
URI:
http://hdl.handle.net/11287/593852
DOI:
10.1016/j.jsurg.2013.11.006
PubMed ID:
24797862
Additional Links:
http://linkinghub.elsevier.com/retrieve/pii/S1931-7204(13)00289-4
Type:
Journal Article
Language:
eng
ISSN:
1878-7452
Appears in Collections:
2014 RD&E publications; HeSRU publications

Full metadata record

DC FieldValue Language
dc.contributor.authorBright, Elizabethen
dc.contributor.authorVine, S. J.en
dc.contributor.authorDutton, Thomasen
dc.contributor.authorWilson, M. R.en
dc.contributor.authorMcGrath, John Sen
dc.date.accessioned2016-01-19T12:35:46Zen
dc.date.available2016-01-19T12:35:46Zen
dc.date.issued2014-05-01en
dc.identifier.citationJ Surg Educ. 2014 May-Jun;71(3):434-9.en
dc.identifier.issn1878-7452en
dc.identifier.pmid24797862en
dc.identifier.doi10.1016/j.jsurg.2013.11.006en
dc.identifier.urihttp://hdl.handle.net/11287/593852en
dc.description.abstractOBJECTIVE: To examine novice and expert differences in visual control strategies while performing a virtual reality transurethral resection of the prostate (TURP) task and to determine if these differences could provide a novel method for assessing construct validity of the simulator. SUBJECTS AND METHODS: A total of 11 novices (no TURP experience) and 7 experts (>200 TURPs) completed a virtual reality prostate resection task on the TURPsim (Simbionix USA Corp, Cleveland, OH) while wearing an eye tracker (ASL, Bedford, MA). Performance parameters and the surgeon's visual control strategy were measured and compared between the 2 groups. RESULTS: Experts resected a greater percentage of prostate than novices (p < 0.01) and had less active diathermy time without tissue contact (p < 0.01). Experts adopted a target-locking visual strategy, employing fewer visual fixations (p < 0.05) with longer mean fixation duration (p < 0.005). With multiple learning trials, novices' performance improved and the adoption of a more expertlike gaze strategy was observed. CONCLUSION: Significant differences between experts and novices in both performance and visual control strategy were observed. The study of visual control strategies may be a useful adjunct, alongside measurements of motor performance, providing a novel method of assessing the construct validity of surgical simulators.en
dc.language.isoengen
dc.publisherElsevieren
dc.relation.urlhttp://linkinghub.elsevier.com/retrieve/pii/S1931-7204(13)00289-4en
dc.titleVisual control strategies of surgeons: a novel method of establishing the construct validity of a transurethral resection of the prostate surgical simulatoren
dc.typeJournal Articleen
dc.identifier.journalJournal of surgical educationen

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