Virtual Reality Laparoscopic Nephrectomy Simulator Is Lacking in Construct Validity

Wijn, R.P.W.F.; Persoon, Marjolein C.; Schout, Barbara M.A.; Martens, Elisabeth J.; Scherpbier, A. J. J. A.; Hendrikx, Ad J.M.

doi:10.1089/end.2009.0219

Cited by 27 publications

(16 citation statements)

References 24 publications

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“…The lack of construct validity for virtual reality motion metrics was surprising as virtual reality models are highly validated training tools and the motion metrics also have shown construct validity for assessment . However, previous validation studies of the virtual reality trainer used in this study have shown conflicting results . Eriksen and Duffy et al demonstrated construct validity in virtual reality using eight different tasks, and all metrics showed significant difference between the experienced and inexperienced group.…”

Section: Discussionmentioning

confidence: 70%

Instrument Motion Metrics for Laparoscopic Skills Assessment in Virtual Reality and Augmented Reality

et al. 2016

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Section: Discussionmentioning

confidence: 70%

Instrument Motion Metrics for Laparoscopic Skills Assessment in Virtual Reality and Augmented Reality

et al. 2016

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“…Various laparoscopic surgery training systems have been developed. Some recent systems reproduces the entire procedure of laparoscopic radical nephrectomy [18,19]. However, to the best of our knowledge, no other system provides an actual operative view of the individual patient.…”

Section: Discussionmentioning

confidence: 99%

Prediction of open urinary tract in laparoscopic partial nephrectomy by virtual resection plane visualization

et al. 2014

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BackgroundThe purpose of this study is presenting a method to predict the presence of an open urinary tract and the position of the opening in laparoscopic partial nephrectomy from three dimensional (3D) computed tomography (CT) images by using novel image segmentation and visualization techniques.MethodsFrom CT images of patients who underwent laparoscopic partial nephrectomy, 3D regions of the kidney, urinary tract, and tumor were segmented. For each patient, multiple virtual resection planes of the kidney with different surgical margins (1 mm to 5 mm, every 1 mm) were generated and the presence of an open urinary tract and the position of the opening were predicted from the images.ResultsWe compared the predictions with actual operations in 5 cases by using recorded video of the operations and operative notes. In terms of the presence of an open urinary tract, agreement of the predictions and the intraoperative results was obtained in all patients. The expected positions of the openings were close to those in the actual operations.ConclusionsWe have developed a method to virtually visualize the resection plane of laparoscopic partial nephrectomy. Image segmentation methods used in this study were precise and effective. The comparison indicated that our method accurately predicted the presence of an open urinary tract and the position of the opening and provided useful preoperative information.

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“…An international consent must also be defined in order to uniform the training and assessment techniques (21). Recently, The European Endoscopic Surgery Consensus recommended that the basic laparoscopic surgical tasks should be practiced in a laboratory before the practice on human beings (22).…”

Section: Discussionmentioning

confidence: 99%

“…Recently, The European Endoscopic Surgery Consensus recommended that the basic laparoscopic surgical tasks should be practiced in a laboratory before the practice on human beings (22). But, although modern simulators are more realistic, it is still hard to transfer the virtual reality skills to surgical practice (21,23,24). LapSim simulators have programs very similar to real surgery, and may be considered an advantageous factor.…”

Section: Discussionmentioning

confidence: 99%

Establishing the minimal number of virtual reality simulator training sessions necessary to develop basic laparoscopic skills competence: evaluation of the learning curve

Duarte¹,

Cury

Oliveira

et al. 2013

Int. braz j urol.

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Introduction: Medical literature is scarce on information to define a basic skills training program for laparoscopic surgery (peg and transferring, cutting, clipping). The aim of this study was to determine the minimal number of simulator sessions of basic laparoscopic tasks necessary to elaborate an optimal virtual reality training curriculum. Materials and Methods: Eleven medical students with no previous laparoscopic experience were spontaneously enrolled. They were submitted to simulator training sessions starting at level 1 (Immersion Lap VR, San Jose, CA), including sequentially camera handling, peg and transfer, clipping and cutting. Each student trained twice a week until 10 sessions were completed. The score indexes were registered and analyzed. The total of errors of the evaluation sequences (camera, peg and transfer, clipping and cutting) were computed and thereafter, they were correlated to the total of items evaluated in each step, resulting in a success percent ratio for each student for each set of each completed session. Thereafter, we computed the cumulative success rate in 10 sessions, obtaining an analysis of the learning process. By non-linear regression the learning curve was analyzed. Results: By the non-linear regression method the learning curve was analyzed and a r 2 = 0.73 (p < 0.001) was obtained, being necessary 4.26 (~five sessions) to reach the plateau of 80% of the estimated acquired knowledge, being that 100% of the students have reached this level of skills. From the fifth session till the 10th, the gain of knowledge was not significant, although some students reached 96% of the expected improvement. Conclusions: This study revealed that after five simulator training sequential sessions the students' learning curve reaches a plateau. The forward sessions in the same difficult level do not promote any improvement in laparoscopic basic surgical skills, and the students should be introduced to a more difficult training tasks level.

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Virtual Reality Laparoscopic Nephrectomy Simulator Is Lacking in Construct Validity

Cited by 27 publications

References 24 publications

Instrument Motion Metrics for Laparoscopic Skills Assessment in Virtual Reality and Augmented Reality

Instrument Motion Metrics for Laparoscopic Skills Assessment in Virtual Reality and Augmented Reality

Prediction of open urinary tract in laparoscopic partial nephrectomy by virtual resection plane visualization

Establishing the minimal number of virtual reality simulator training sessions necessary to develop basic laparoscopic skills competence: evaluation of the learning curve

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