How Useful and Realistic is the Uro Trainer for Training Transurethral Prostate and Bladder Tumor Resection Procedures?
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Abstract
Purpose:
We evaluated the face and content validity (novice and expert opinions of realism and usefulness) of the Uro Trainer (Karl Storz GmbH, Tuttlingen, Germany), a simulator for transurethral resection procedures, to ascertain whether it is justifiable to continue the validation process by performing prospective experimental studies.
Materials and Methods:
Between 2006 and 2008, 104 urologists and urology residents performed a transurethral bladder tumor resection and/or transurethral prostate resection procedure on the Uro Trainer, and rated simulator usefulness and realism on a 10-point scale (1—not at all useful/realistic/poor, 10—very useful/realistic/excellent). Participants were classified as experts (more than 50 procedures performed) or novices (50 or fewer procedures performed). Because the literature offered no guidelines for interpreting our data, we used criteria from other studies to interpret the results.
Results:
A total of 161 questionnaires were analyzed from 97 (21% experts, 79% novices) and 64 (30% experts, 70% novices) participants who performed transurethral prostate resection and transurethral bladder tumor resection procedures, respectively. Mean usefulness, realism and overall scores varied from 5.6 to 8.2 (SD 1.4–2.5). Measured by validity criteria from other studies, Uro Trainer face and content validity was unsatisfactory, with ratings on only 3%, 5% and 8% of the parameters interpreted as positive, moderately acceptable and good, respectively.
Conclusions:
Measured against criteria from other validation studies, Uro Trainer face and content validity appears to be unsatisfactory. Modification of the simulator seems advisable before further experimental validation studies are initiated. The lack of general guidelines for establishing face and content validity suggests a need for consensus about appropriate methods for evaluating the validity of simulators.
References
- 1 : Historical review of surgical simulation–a personal perspective. World J Surg2008; 32: 141. Google Scholar
- 2 : A computer generated interactive transurethral prostatic resection simulator. J Urol1999; 162: 1633. Link, Google Scholar
- 3 : A computer-assisted training/monitoring system for TURP structure and design. IEEE Trans Inf Technol Biomed1999; 3: 242. Google Scholar
- 4 : Use of a virtual reality, real-time, simulation model for the training of urologists in transurethral resection of the prostate. Scand J Urol Nephrol2005; 39: 313. Google Scholar
- 5 : A computer assisted surgical trainer for transurethral resection of the prostate. J Urol2002; 168: 2111. Link, Google Scholar
- 6 : The representation of blood flow in endourologic surgical simulations. Stud Health Technol Inform2001; 81: 365. Google Scholar
- 7 : Simulation of bleeding in endoscopic procedures using virtual reality. J Endourol2002; 16: 451. Google Scholar
- 8 : Face, content and construct validity of the University of Washington virtual reality transurethral prostate resection trainer. J Urol2004; 172: 1953. Link, Google Scholar
- 9 : The virtual reality transurethral prostatic resection trainer: evaluation of discriminate validity. J Urol2007; 177: 2283. Link, Google Scholar
- 10 : Surgical simulation: a urological perspective. J Urol2008; 179: 1690. Link, Google Scholar
- 11 : High-level virtual reality simulator for endourologic procedures of lower urinary tract. Urology2006; 67: 1144. Google Scholar
- 12 : Consensus guidelines for validation of virtual reality surgical simulators. Surg Endosc2005; 19: 1523. Google Scholar
- 13 : Validation of surgical simulators. J Endourol2007; 21: 244. Google Scholar
- 14 : Evaluation of a new virtual-reality training simulator for hysteroscopy. Surg Endosc2008; . Epub ahead of print. Google Scholar
- 15 : Face validation of the Simbionix LAP Mentor virtual reality training module and its applicability in the surgical curriculum. Surg Endosc2007; 21: 1641. Google Scholar
- 16 : The EZ Trainer: validation of a portable and inexpensive simulator for training basic laparoscopic skills. J Urol2008; 179: 662. Link, Google Scholar
- 17 : Expert and construct validity of the Simbionix GI Mentor II endoscopy simulator for colonoscopy. Surg Endosc2008; 22: 158. Google Scholar
- 18 : Face-, expert, and referent validity of the Xitact LS500 laparoscopy simulator. Surg Endosc2002; 16: 1764. Google Scholar
- 19 : G*Power 3: a flexible statistical power analysis program for the social, behavioral, and biomedical sciences. Behav Res Methods2007; 39: 175. Google Scholar
- 20 : Analysis of a computer based simulator as an educational tool for cystoscopy: subjective and objective results. J Urol2008; 179: 267. Link, Google Scholar
