Kyle R. Wanzel

The educational impact of bench model fidelity on the acquisition of technical skill: The use of clinically relevant outcome measures

Objective:To evaluate the impact of bench model fidelity on the acquisition of technical skill using clinically relevant outcome measures. Methods:Fifty junior surgery residents participated in a 1-day microsurgical training course. Participants were randomized to 1 of 3 groups: 1) high-fidelity model training (live rat vas deferens; n = 21); 2) low-fidelity model training (silicone tubing; n = 19); or 3) didactic training alone (n = 10). Following training, all participants were assessed on the high- and low-fidelity bench models. Immediate outcome measures included procedure times, blinded, expert assessment of videotaped performance using checklists and global rating scales, anastomotic patency, suture placement precision, and final product ratings. Delayed outcome measures (obtained from the live rat vas deferens 30 days following training) included anastomotic patency, presence of a sperm granuloma, and the presence of sperm on microscopy. Results:Following training, checklist (P < 0.001) and global rating scores (P < 0.001) on the bench model simulators were higher among subjects who received hands-on training, irrespective of model fidelity. Immediate anastomotic patency rates of the rat vas deferens were higher with increasing model fidelity training (P = 0.048). Delayed anastomotic patency rates were higher among subjects who received bench model training, irrespective of model fidelity (P = 0.02). Rates of sperm presence on microscopy were higher among subjects who received high-fidelity model training compared with subjects who received didactic training (P = 0.039) but did not differ among subjects in the high- and low-fidelity groups. Conclusions:Surgical skills training on low-fidelity bench models appears to be as effective as high-fidelity model training for the acquisition of technical skill among novice surgeons.

Effect of visual-spatial ability on learning of spatially-complex surgical skills.

Visual-spatial ability is thought to be important in competency in specific surgical procedures. To test this hypothesis, 37 surgical residents completed six tests of visual-spatial ability, ranging from low-level to high-level visual processing. Using previously validated and objective instruments, we then assessed their ability to complete and learn a spatially-complex surgical procedure. Residents with higher visual-spatial scores in the form-board test and the mental-rotations test did significantly better in the procedure than did those with lower scores. After practice and feedback, residents with lower scores achieved a comparable level of competency. Our results suggest that visual-spatial ability is related to competency and quality of results in complex surgery, and could potentially be used in resident selection, career counselling, and training.

Visual-spatial ability correlates with efficiency of hand motion and successful surgical performance

BACKGROUND This study examines the influence of visual-spatial ability and manual dexterity on surgical performance across 3 levels of expertise. METHODS Dental students, surgical residents, and staff surgeons completed standardized tests of manual dexterity and visual-spatial ability and were assessed objectively while performing the rigid fixation of an anterior mandible on bench model simulations. Outcome variables included expert assessment of technical performance and efficiency of hand motion during the procedure (recorded using electromagnetic sensors). RESULTS Visual-spatial scores correlated significantly with surgical performance scores within the group of dental students (r=.40 to.73), but this was not the case for residents or staff surgeons. For all groups, manual dexterity did not correlate with hand motion parameters. There were no differences between groups in visual-spatial ability or manual dexterity, but highly significant differences were seen in surgical performance scores (P<.001), in that surgeons outperformed residents, who in turn outperformed students. CONCLUSIONS Among novices, visual-spatial ability is associated with skilled performance on a spatially complex surgical procedure. However, advanced trainees and experts do not score any higher on carefully selected visual-spatial tests, suggesting that practice and surgical experience may supplant the influence of visual-spatial ability over time. Thus, the use of these tests for the selection of residents is not currently recommended; they may be of more use in identifying those novice trainees (ie, those with lower test scores) who might benefit most from brief supplementary instruction on specific technical tasks.

Evaluating the effectiveness of a 2-year curriculum in a surgical skills center

BACKGROUND This study was a formative evaluation of a 2-year Surgical Skills Center Curriculum (SSCC) using objective measures of surgical performance and self-reported process-oriented evaluations. METHODS Fifty postgraduate third-year (PGY-3) residents participated in an Objective Structured Assessment of Technical Skills (OSATS) examination. Nineteen residents underwent the SSCC and 31 residents did not. During the SSCC, self-reported student and faculty evaluations were completed after each session. RESULTS For the OSATS examination, scores were not significantly different between treatment and control groups, on either the checklist (66.4 +/- 6.1 versus 64.1 +/- 10.8) or global rating scale scores (66.9 +/- 6.9 versus 68.0 +/- 9.6). Further comparisons between groups on individual OSATS stations revealed no significant differences between groups. The majority of student and faculty evaluation remarks were highly positive. CONCLUSIONS The OSATS results failed to support our hypothesis that training on a core procedure in a single session during a SSCC would have an appreciable and sustained effect after 2 years. Self-reported process-oriented evaluations support the utility of our SSCC.

Residency training in plastic surgery: a survey of educational goals.

With the advent of integrative plastic surgical training programs, requirements for earlier specialization decisions, and an increasing subspecialization within the practice of plastic surgery, the educational goals of residency training may have changed. The duration and extent of training required are also currently being questioned. This study was performed to better understand the necessary roles of plastic surgery residencies and to determine how these demands might optimally be met. Of 151 practicing plastic surgeons in the Ontario, Canada, region, 81 (53.6 percent) responded to a survey. General agreement was that 2 years was an optimal length of time for core surgical training, which should then be followed by at least 3 years of plastic surgical training. Opinions on the ideal length of time training in specific medical and surgical disciplines are discussed. Overall, respondents thought that two thirds of training should occur in tertiary care centers, with the remaining time spent at smaller community centers and private clinics. Nearly half of respondents thought that research training should be a mandatory part of the residency, although the amount of protected time for this activity varied substantially. Most thought that unrestricted elective time should also be available. Academic plastic surgeons rated the importance of research training (p < 0.01), critical appraisal skills (p < 0.05), and teaching skills (p < 0.05) as significantly more important than did their nonacademic colleagues. The authors present results from the Ontario region and a template for determining optimal characteristics for training programs. Further investigation may be of timely importance during a foreseeable future transition from traditional to integrative plastic surgery residency training.

Late presentation of a complete complex thumb metacarpophalangeal joint dislocation: A case report.

Metacarpophalangeal (MP) joint injuries and dislocations of the fingers and thumb are not uncommon. They can be classified directionally as either being volar or dorsal, and are further categorized as incomplete, simple complete or complex complete. Complex dislocations are described as dislocations that are irreducible and often require surgical intervention. This is often because tissue has become entrapped within the MP joint, precluding its anatomical reduction. For the thumb MP joint, anatomical structures that may become trapped include the volar plate, sesamoid bones, bony fracture fragments or the flexor pollicis longus tendon. Both dorsal and volar surgical approaches have been described, and their relative merits will be discussed. The unusual case of a late presentation (two months postinjury) of a complex complete dorsal dislocation of the thumb MP joint approached from a dorsal incision is presented.