Julian Hance

Bio: Julian Hance is an academic researcher from Imperial College London. The author has contributed to research in topics: Psychomotor learning & Laparoscopic surgery. The author has an hindex of 10, co-authored 11 publications receiving 746 citations.

A competency-based virtual reality training curriculum for the acquisition of laparoscopic psychomotor skill.

Abstract: Abstact Background Studies have demonstrated the beneficial effect of training novice laparoscopic surgeons using virtual reality (VR) simulators, although there is still no consensus regarding an optimal VR training curriculum. This study aims to establish and validate a structured VR curriculum to provide an evidence-based approach for laparoscopic training programmes. Methods The minimally invasive VR simulator (MIST-VR) has 12 abstract laparoscopic tasks, each at 3 graduated levels of difficulty (easy, medium, and hard). Twenty medical students completed 2 sessions of all tasks at the easy level, 10 sessions at the medium level, and finally 5 sessions of the 2 most complex tasks at the hard level. At the medium level, subjects were randomized into 2 equal groups performing either all 12 tasks (group A) or the 2 most complex tasks (group B). Performance was measured by time taken, path length, and errors for each hand. The results were compared between groups, and to those of 10 experienced laparoscopic surgeons. Results Baseline performance of both groups was similar at the easy level. At the medium level, learning curves for all 3 parameters reached plateau at the second (group A, P P Conclusion A graduated laparoscopic training curriculum enables trainees to familiarise, train and be assessed on laparoscopic VR simulators. This study can aid the incorporation of VR simulation into established surgical training programmes.

Objective assessment of technical skills in cardiac surgery

Abstract: Objective: Reduced training time combined with no rigorous assessment for technical skills makes it difficult for trainees to monitor their competence. We have developed an objective bench-top assessment of technical skills at a level commensurate with a junior registrar in cardiac surgery. Methods: Forty cardiothoracic surgeons were recruited for the study, consisting of 12 junior trainees (year 1‐3), 15 senior trainees (year 4‐6) and 13 consultants. The assessment consisted of four key tasks on standardised bench-top models: aortic root cannulation, vein-graft to aorta anastomosis, vein-graft to Left Anterior Descending (LAD) anastomosis and femoral triangle dissection. An expert surgeon was present at each station to provide passive assistance and rate performance on a validated global rating scale giving rise to a total possible score of 40. Three expert surgeons repeated the ratings retrospectively, using blinded video recordings. Data analysis employed non-parametric tests. Results: Both live and video scores differentiated significantly between performances of all groups of surgeons for all four stations (P!0.01) (median live and video score for LAD; Junior 19,17; Senior 29,22; Consultant 36,28). Correlations between live and blinded rating were high (rZ0.67‐0.84; P!0.001) as was inter-rater reliability between the three expert video raters (aZ0.81). Conclusions: The use of bench-top tasks to differentiate between cardiac surgeons of differing technical abilities has been validated for the first time. Furthermore, it is unnecessary to perform post-hoc video rating to obtain objective data. These measures can provide formative feedback for surgeons-in-training and lead to the development of a competency-based technical skills curriculum. Q 2005 Elsevier B.V. All rights reserved.

Evaluating Surgical Dexterity During Corneal Suturing

Abstract: Objective To evaluate motion tracking as an aid to a more objective assessment of ophthalmic microsurgical skill. Methods In a cohort study, 3 groups of differing levels of surgical experience were assessed. The groups included novice surgeons (n = 10) with fewer than 5 previously performed corneal sutures, trainee surgeons (n = 10) with 5 to 100 previously performed corneal sutures, and expert surgeons (n = 10) with more than 100 previously performed corneal sutures. The Imperial College Surgical Assessment Device was used for the objective assessment of surgical dexterity during corneal suturing. Each of the subjects used a 10-0 nylon suture in a 3-1-1 pattern on an artificial eye (Royal College of Ophthalmologists, London, England). The Imperial College Surgical Assessment Device measures 3-dimensional spatial vectors via electromagnetic sensors attached to the surgeon's fingers. The number of movements, path length for the respective movements, and time taken to complete the given task were recorded. Results Highly statistically significant differences were found between the 3 grades of surgeon experience for time taken ( P P P = .002) to complete the given task. Conclusions Motion analysis measured by this technology may be useful in the formal surgical training of residents and as an objective quantitative measure of dexterity.

Simulation in healthcare education: A best evidence practical guide. AMEE Guide No. 82

Abstract: Over the past two decades, there has been an exponential and enthusiastic adoption of simulation in healthcare education internationally. Medicine has learned much from professions that have established programs in simulation for training, such as aviation, the military and space exploration. Increased demands on training hours, limited patient encounters, and a focus on patient safety have led to a new paradigm of education in healthcare that increasingly involves technology and innovative ways to provide a standardized curriculum. A robust body of literature is growing, seeking to answer the question of how best to use simulation in healthcare education. Building on the groundwork of the Best Evidence in Medical Education (BEME) Guide on the features of simulators that lead to effective learning, this current Guide provides practical guidance to aid educators in effectively using simulation for training. It is a selective review to describe best practices and illustrative case studies. This Guide is the second part of a two-part AMEE Guide on simulation in healthcare education. The first Guide focuses on building a simulation program, and discusses more operational topics such as types of simulators, simulation center structure and set-up, fidelity management, and scenario engineering, as well as faculty preparation. This Guide will focus on the educational principles that lead to effective learning, and include topics such as feedback and debriefing, deliberate practice, and curriculum integration – all central to simulation efficacy. The important subjects of mastery learning, range of difficulty, capturing clinical variation, and individualized learning are also examined. Finally, we discuss approaches to team training and suggest future directions. Each section follows a framework of background and definition, its importance to effective use of simulation, practical points with examples, and challenges generally encountered. Simulation-based healthcare education has great potential for use throughout the healthcare education continuum, from undergraduate to continuing education. It can also be used to train a variety of healthcare providers in different disciplines from novices to experts. This Guide aims to equip healthcare educators with the tools to use this learning modality to its full capability.

Comparative effectiveness of instructional design features in simulation-based education: Systematic review and meta-analysis

Abstract: Background: Although technology-enhanced simulation is increasingly used in health professions education, features of effective simulation-based instructional design remain uncertain. Aims: Evaluate the effectiveness of instructional design features through a systematic review of studies comparing different simulation-based interventions. Methods: We systematically searched MEDLINE, EMBASE, CINAHL, ERIC, PsycINFO, Scopus, key journals, and previous review bibliographies through May 2011. We included original research studies that compared one simulation intervention with another and involved health professions learners. Working in duplicate, we evaluated study quality and abstracted information on learners, outcomes, and instructional design features. We pooled results using random effects meta-analysis. Results: From a pool of 10 903 articles we identified 289 eligible studies enrolling 18 971 trainees, including 208 randomized trials. Inconsistency was usually large (I 2 4 50%). For skills outcomes, pooled effect sizes ( positive numbers favoring the instructional design feature) were 0.68 for range of difficulty (20 studies; p5 0.001), 0.68 for repetitive practice (7 studies; p ¼ 0.06), 0.66 for distributed practice (6 studies; p ¼ 0.03), 0.65 for interactivity (89 studies; p5 0.001), 0.62 for multiple learning strategies (70 studies; p5 0.001), 0.52 for individualized learning (59 studies; p5 0.001), 0.45 for mastery learning (3 studies; p ¼ 0.57), 0.44 for feedback (80 studies; p5 0.001), 0.34 for longer time (23 studies; p ¼ 0.005), 0.20 for clinical variation (16 studies; p ¼ 0.24), and � 0.22 for group training (8 studies; p ¼ 0.09). Conclusions: These results confirm quantitatively the effectiveness of several instructional design features in simulation-based education.

The value of haptic feedback in conventional and robot-assisted minimal invasive surgery and virtual reality training: a current review

Abstract: Background Virtual reality (VR) as surgical training tool has become a state-of-the-art technique in training and teaching skills for minimally invasive surgery (MIS). Although intuitively appealing, the true benefits of haptic (VR training) platforms are unknown. Many questions about haptic feedback in the different areas of surgical skills (training) need to be answered before adding costly haptic feedback in VR simulation for MIS training. This study was designed to review the current status and value of haptic feedback in conventional and robot-assisted MIS and training by using virtual reality simulation.

Objective assessment of technical surgical skills

Abstract: BACKGROUND: Surgeons are increasingly being scrutinized for their performance and there is growing interest in objective assessment of technical skills. The purpose of this study was to review all evidence for these methods, in order to provide a guideline for use in clinical practice. METHODS: A systematic search was performed using PubMed and Web of Science for studies addressing the validity and reliability of methods for objective skills assessment within surgery and gynaecology only. The studies were assessed according to the Oxford Centre for Evidence-based Medicine levels of evidence. RESULTS: In total 104 studies were included, of which 20 (19.2 per cent) had a level of evidence 1b or 2b. In 28 studies (26.9 per cent), the assessment method was used in the operating room. Virtual reality simulators and Objective Structured Assessment of Technical Skills (OSATS) have been studied most. Although OSATS is seen as the standard for skills assessment, only seven studies, with a low level of evidence, addressed its use in the operating room. CONCLUSION: Based on currently available evidence, most methods of skills assessment are valid for feedback or measuring progress of training, but few can be used for examination or credentialing. The purpose of the assessment determines the choice of method.

Laparoscopic skills training and assessment.

Abstract: Background: The introduction of laparoscopic techniques to general surgery was associated with many unnecessary complications, which led to the development of skills laboratories to train novice laparoscopic surgeons. This article reviews the tools currently available for training and assessment in laparoscopic surgery. Methods: Medline searches were performed to identify articles with combinations of the following key words: laparoscopy, training, curriculum, virtual reality and assessment. Further articles were obtained by manually searching the reference lists of identified papers. Results: Current training involves the use of box trainers with either innate models or animal tissues; it lacks objective assessment of skill acquisition. Virtual reality simulators have the ability to teach laparoscopic psychomotor skills, and objective assessment is now possible using dexterity-based and video analysis systems. Conclusion: The tools are now available for the development of a structured, competency-based, laparoscopic surgical training programme. Copyright © 2004 British Journal of Surgery Society Ltd. Published by John Wiley & Sons, Ltd.