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N K Francis

Publications and source records attributed to N K Francis.

4 recordsLinked to original sources

Consensus guidelines for validation of virtual reality surgical simulators.

The Work Group for Evaluation and Implementation of Simulators and Skills Training Programmes is a newly formed sub-group of the European Association of Endoscopic Surgeons (EAES). This work group undertook a review of validation evidence for surgical simulators and the resulting consensus is presented in this article. Using clinical guidelines criteria, the evidence for validation for six different simulators was rated and subsequently translated to a level of recommendation for each system. The simulators could be divided into two basic types; systems for laparoscopic general surgery and flexible gastrointestinal endoscopy. Selection of simulators for inclusion in this consensus was based on their availability and relatively widespread usage as of July 2004. Whilst level 2 recommendations were achieved for a few systems, it was clear that there was an overall lack of published validation studies with rigorous experimental methodology. Since the consensus meeting, there have been a number of new articles, system upgrades and new devices available. The work group intends to update these consensus guidelines on a regular basis, with the resulting article available on the EAES website (http://www.eaes-eur.org ).

Computer Simulation↗

Reliability of the Dundee Endoscopic Psychomotor Tester (DEPT) for dominant hand performance.

BACKGROUND: The Dundee Endoscopic Psychomotor Tester (DEPT) was developed as a means of obtaining an objective assessment of endoscopic performance using a single hand. This paper evaluates the reliability of the system. METHODS: Twenty medical students were tested on the DEPT for four runs using the dominant hand. Test-retest reproducibility and coefficient alpha to measure the internal consistency were used as indexes of the reliability of the DEPT system. RESULTS: A positive correlation was found between different runs in all outcome measures of the DEPT. Coefficient a was > 0.7 for all parameters. CONCLUSION: DEPT provides a reliable method for the objective assessment of single-handed endoscopic performance in terms of aiming and force exerted on the target plate.

Clinical Competence↗

Reliability of the Advanced Dundee Endoscopic Psychomotor Tester for bimanual tasks.

OBJECTIVE: To evaluate the reliability of the Advanced Dundee Endoscopic Psychomotor Tester (ADEPT). DESIGN: The Advanced Dundee Endoscopic Psychomotor Tester was developed for objective evaluation of bimanual endoscopic tasks. The system is in several aspects relevant to an actual endoscopic environment, and initial studies showed a strong correlation with clinical competence. Twenty medical students were tested on ADEPT (10 runs in 2 sessions). Their performances for 2 sessions were analyzed by the Spearman rho correlation to examine test-retest reliability. Coefficient alpha was used to indicate the internal consistency of the system. RESULTS: There was no significant improvement in task performance during the 10 runs. A positive correlation on ADEPT performance was found between the 2 test sessions. A coefficient alpha of.98 was observed between the different tasks of ADEPT. CONCLUSION: These findings confirm that ADEPT is a reliable system for assessment of bimanual endoscopic task performance.

Clinical Competence↗

The performance of master surgeons on standard aptitude testing.

BACKGROUND: Identification of the desired psychomotor abilities of optimal surgical performance, if possible, would be useful in the selection of surgical trainees. The aim of this study was to determine the level of these abilities among endoscopic consultant surgeons held in high regard by their peers. METHODS: Twenty endoscopic consultant "master" surgeons were tested on three aptitude tests: the Gibson Spiral Maze Test (error score measures eye-hand coordination), the Crawford Small Parts Dexterity Test (execution time indicates manual dexterity), and the Space Relations Test (correct scores reflect visuo-spatial ability). Their performance was compared with that of 20 medical students and the reference norm as provided by the tests' manuals. RESULTS: The median scores of master surgeons fell in the 20th, 24th, and 30th percentiles, whereas the scores of medical students fell in the 50th, 20th, and 65th percentile of norm reference for the Gibson Spiral Maze, Crawford Small Parts Dexterity, and Space Relations tests, respectively. The master surgeons enacted significantly fewer errors (Gibson Spiral Maze), had similar execution times (Crawford Small Parts Dexterity), and lower visuo-spatial scores (Space Relations) than medical students. CONCLUSION: The level of eye-hand coordination and manual dexterity of master surgeons was found to be higher than that of the average norm including medical students, while their visuo-spatial ability was lower.

Aptitude Tests↗