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Biomedical subjects

Richard K Reznick

Publications and source records attributed to Richard K Reznick.

13 recordsLinked to original sources
PubMed2007

Verbal feedback from an expert is more effective than self-accessed feedback about motion efficiency in learning new surgical skills.

BACKGROUND: Teaching of technical surgical skills to undergraduate medical students in a laboratory setting away from the patient is not common practice. Because of the large volume of students and shortage of available teaching faculty new methods of teaching must be developed for this group of trainees. In this study we examined the effectiveness of computer-based video training, different types of computer-based motion efficiency feedback (with and without expert criteria), and expert feedback on learning of a basic technical skill in medical students. METHODS: Forty-five junior medical students were randomized into 3 groups and learned suturing and knot-tying skills. Group A received computer-generated feedback about the economy of their movements. Group B received the same motion economy feedback, as well as expert reference values. Group C received verbal feedback from an expert. All groups were pre-tested, allowed 18 practice trials, and post-tested, and their skill retention was retested after 1 month. Performance was assessed by expert analysis using an objective structured analysis of technical skill and by computer analysis (Imperial College Surgical Assessment Device [ICSAD]). RESULTS: All groups showed improvement from pre-test to post-test. However, only group C showed retention of skill on delayed performance testing. CONCLUSIONS: Verbal feedback from an expert instructor led to lasting improvements in technical skills performance. Providing information about motion efficiency did not lead to similar improvements.

Biofeedback, Psychology↗
PubMed2006

Needs assessment of neurosurgery trainees: a survey study of two large training programs in the developing and developed worlds.

BACKGROUND: There are challenges facing surgical education in both the developing and the developed worlds. Few studies have examined trainee perceptions of their educational needs in a systematic way. We undertook a study to examine this issue, focusing on two large training programs, one in the developed world and one in the developing world. METHODS: Neurosurgical trainees at the University of Toronto, Toronto, Canada, and at Hasan Sadikin Hospital in Bandung, Indonesia, were surveyed with a comprehensive questionnaire assessing both the content and the methods of their training. The questionnaire had 37 quantitative questions requesting responses on a 7-point Likert scale and three open-ended questions to give more qualitative data. RESULTS: Sixty-four percent of all trainees responded. A number of interesting findings about the strengths and weaknesses of training emerged. For example, Bandung trainees felt they had excellent training in trauma but not in specialty areas, especially spine and vascular, with ample opportunity to operate as the primary surgeon. Toronto trainees felt that the volume and the variety of cases were excellent but they did not have enough ambulatory experience, and that they had suboptimal experience as the primary surgeon. Trainees in both centers agree that they will feel competent to practice neurosurgery upon completion of their training. CONCLUSION: This study defined different educational needs for neurosurgical trainees in two centers that reflect both their individual training environments and the local culture of medicine. As such, trainees' perceptions of these needs represent an important adjunct to program evaluation.

Attitude of Health Personnel↗
PubMed2005

'You learn better under the gun': intimidation and harassment in surgical education.

BACKGROUND: Medical literature has documented a high prevalence of intimidation and harassment in the educational context. However, the research has failed to adequately delineate the nature of these phenomena as well as the different ways in which diverse actors perceive the behaviours in question. METHODS: Based on qualitative methodology anchored in a social constructionism framework, how teachers (staff surgeons) and learners (surgical residents) define intimidation and harassment were documented and compared. In addition, teachers' and learners' perceptions of the impact of these behaviours on the learning environment, including their effects on the socialisation of surgeons in training, were examined. FINDINGS: Five group interviews and 22 individual interviews were conducted across 2 university departments of surgery with a total of 22 faculty and 14 resident participants. Interviewees acknowledged the existence of intimidation and harassment, while at the same time rationalising its occurrence. This paradox was encapsulated in participant descriptions using terms such as 'good intimidation'. Our examination of the data helped us to understand that participants sustained the paradox of beneficial intimidation and harassment by rationalising questionable behaviours on 3 specific dimensions, namely: whether an acceptable purpose could be attributed to the perpetrator; whether positive effects of the behaviour existed, and whether there was a perceived necessity for the behaviour. INTERPRETATIONS: Even while their dysfunctional characteristics are recognised, intimidation and harassment are often seen as functional educational tools. The cultural value currently accorded these behaviours needs to be taken into account in educational interventions designed to shift attitudes and actions in this domain.

Attitude of Health Personnel↗
PubMed2004

Laboratory based training in urological microsurgery with bench model simulators: a randomized controlled trial evaluating the durability of technical skill.

PURPOSE: We evaluated the durability of laboratory based technical skills training in urological microsurgery using bench model simulators. METHODS AND MATERIALS: A total of 50 junior surgery residents (post-graduate years 1 to 3) were recruited to participate in a focused training program in urological microsurgery. Prior to training subjects were randomized to receive hands-on training with bench model simulators (silicone tubing or live rat vas deferens, 40) or didactic training alone (10). Four months following the original training program the technical performance of 18 returning subjects (13 from the bench model and 5 from the didactic training group) was reevaluated using a high fidelity, live animal model (vasovasostomy and rat vas deferens). Outcome measures included blinded, expert assessment of videotaped performance using checklists and global rating scores, and evaluation of anastomotic patency. RESULTS: The retention test checklist (p <0.001), global rating scores (p <0.001) and anastomotic patency rates (p = 0.05) in the live animal model remained significantly higher for subjects who originally received hands-on bench model training compared with those who received didactic training alone. The number of interim practice opportunities with microsurgery correlated significantly with expert global ratings of surgical performance irrespective of the nature of training (r = 0.54, p = 0.02). CONCLUSIONS: Laboratory based technical skills training with bench models can lead to a significant retention of technical skill by novice surgeons. Measured performance improvements appear to be durable with time. However, the opportunity for repeat hands-on practice appears to maximize the retention of technical skill.

Adult↗
PubMed2004

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.

Adult↗
PubMed2003

Validation of novel and objective measures of microsurgical skill: Hand-motion analysis and stereoscopic visual acuity.

Our purposes were: 1) to establish the predictive validity of stereoscopic visual acuity and microsurgical performance, and 2) to establish the construct and concurrent validity of hand-motion analysis as an objective and sensitive measure of microsurgical performance. Using a surgical microscope, 50 surgical residents completed a standardized microsurgical suturing task at baseline and following microsurgical training. Microsurgical performance was evaluated by blinded, expert microsurgeons using global rating scales. Measures of stereoscopic visual acuity and hand-motion analysis were correlated with expert global rating scores. Global rating scores correlated significantly with number of hand movements (r = -0.47, P = 0.001) and hand-travel distance (r = -0.37, P = 0.008). Economy of hand-motion improved significantly following microsurgical training (number of hand movements, P = 0.046; hand-travel distance, P = 0.04). Measures of stereoscopic visual acuity did not correlate significantly with global rating scores. Hand-motion analysis appears to be an objective and sensitive instrument for assessing microsurgical performance, with evidence of both concurrent and construct validity. The predictive validity of stereoscopic visual acuity and microsurgical performance remains unclear.

Adult↗
PubMed2003

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.

Clinical Competence↗
PubMed2003

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.

Clinical Competence↗
PubMed2003

A sequenced OSCE for licensure: administrative issues, results and myths.

In response to stakeholder demands for a more cost-effective clinical examination, the Medical Council of Canada adopted a sequenced format for the OSCE component of its licensure examination. The sequenced OSCE was administered in 1997 at 14 sites and assessed 1,796 test takers. The 10-station screening test had an alpha = 0.66 (M = 61.3%, SD = 4.7%). The fail rate of 1.7% for Canadian first-time takers was the lowest since 1992. Significant savings were realized despite costs incurred by the new format. The logistical problems that were encountered were largely due to the constraints of administering a multi-site OSCE. Although the sequenced format was cost effective and psychometrically acceptable, the response of many test takers and faculty members was negative. Consequently, it is the logistical and political lessons that may be the most generalizable.

Canada↗
PubMed2002

Internet-based otolaryngology case discussions for medical students.

BACKGROUND: A computer-supported interactive learning environment provides a mechanism whereby medical students at different locations can collaborate to develop an understanding of common otolaryngologic problems as exemplified by cases developed according to the University of Toronto's problem-based learning case guidelines. OBJECTIVE: To see if content knowledge can be acquired as quickly and effectively by computer conferencing as by seminar instruction. METHOD: Seventy students were involved in a study comparing the efficacy of learning about two otolaryngology topics, vertigo and tonsils, by traditional seminar methods or computer conferencing used for illustrative case discussions. RESULTS: A key features examination on these topics showed that both groups gained knowledge during their rotation, but the computer conferencing group showed an increased gain on both topics. Most students enjoyed their computer conferencing experience and found the software easy to navigate. CONCLUSION: Case discussions by computer conferencing result in better acquisition of content knowledge than traditional seminar teaching.

Canada↗