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A comparison of NOTES transvaginal and laparoscopic cholecystectomy procedures based upon task analysis
Arun Nemani1, Ganesh Sankaranarayanan, Jaisa S Olasky
1Center for Modeling, Simulation and Imaging in Medicine (CeMSIM), Rensselaer Polytechnic Institute, Troy, NY, USA, nemana@rpi.edu.
Surgical Endoscopy
|March 13, 2014
Summary
This study analyzed transvaginal natural orifice translumenal endoscopic surgery (NOTES) cholecystectomy, identifying key time-consuming tasks and comparing surgical errors. The transvaginal NOTES procedure shows comparable performance to traditional laparoscopic surgery.
Area of Science:
- Minimally Invasive Surgery
- Surgical Simulation
- Surgical Education
Background:
- Virtual reality simulators can aid in training and developing new procedures for natural orifice translumenal endoscopic surgery (NOTES).
- Previous work identified transvaginal cholecystectomy using a rigid endoscope as a high-impact NOTES procedure for simulator development.
- A detailed task analysis is crucial before developing such a simulator.
Purpose of the Study:
- To conduct a hierarchical task analysis of transvaginal hybrid NOTES cholecystectomy.
- To quantify performance through time series analysis of transvaginal NOTES and traditional laparoscopic cholecystectomy.
- To compare electrosurgery-related errors between the two surgical approaches.
Main Methods:
- Hierarchical task analysis of 19 transvaginal hybrid NOTES cholecystectomy procedures.
- Time series analysis comparing transvaginal NOTES and 11 traditional laparoscopic cholecystectomy procedures.
- Comparative analysis of electrosurgery errors by two independent personnel.
Main Results:
- Gallbladder dissection tasks, including tissue removal and Calot's triangle exposure, are most time-consuming in both laparoscopic and NOTES cholecystectomy.
- A positive correlation exists between tissue removal and dissection time in both procedures (p < 0.10).
- NOTES procedures had fewer errors in gallbladder removal progress, while laparoscopic procedures had fewer errors related to instrument visibility.
Conclusions:
- Task analysis and video quantification identified critical time-consuming steps in NOTES cholecystectomy.
- Electrosurgery error comparison indicates transvaginal NOTES cholecystectomy is not inferior to laparoscopic cholecystectomy.
- Findings support the development of virtual reality simulators for transvaginal NOTES training.