Comparison of Force Matching Performance in Conventional and Laparoscopic Force-Based Task

TLDR: The force perception of 18 novices in the absence of external information is analyzed by comparing the isometric force matching performance of index finger in extended arm posture with that of laparoscopic instrument in a force-based probing task and the effect of handedness on force perception is examined.

Abstract: Laparoscopic instruments have limited haptics feedback. Hence, novices tend to exert excessive force which leads to tissue trauma. In laparoscopic surgery, no external information is available on the magnitude of excessive force. Therefore, novices should be trained to accurately perceive their own force output. This study analyzed the force perception of 18 novices in the absence of external information, by comparing the isometric force matching performance of index finger (i.e. used in conventional procedures) in extended arm posture with that of laparoscopic instrument in a force-based probing task. The study also examined the effect of handedness on force perception. A contra-lateral force matching paradigm was employed to analyze the matching performance of the novice subjects. Interestingly, matching error was found to be lower for laparoscopic instrument. An effect of handedness was visible for laparoscopic instrument only. The dominant hand overestimated the forces of non-dominant hand. The result...