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The effect of delayed visual feedback on telerobotic surgery
T Kim1, P M Zimmerman, M J Wade
1Department of Surgery, Upstate Medical University, 750 East Adams Street, Syracuse, NY 13210, USA.
Surgical Endoscopy
|March 19, 2005
Summary
Visual delay in telerobotic surgery significantly increases task completion time and impairs performance. Surgeons adapt by slowing movements and adopting a "move-and-wait" strategy to compensate for latency.
Area of Science:
- Robotics
- Surgical Technology
- Human-Computer Interaction
Background:
- Telerobotic surgery enables remote procedures but is susceptible to performance degradation due to visual delay (latency).
- Latency between instrument control and visual feedback can alter surgical movement patterns.
Purpose of the Study:
- To investigate the impact of visual delay on surgical task performance.
- To quantify the effects of latency on accuracy and dexterity in simulated surgical tasks.
Main Methods:
- An analog delay device simulated visual latency in an endoscopic skill station.
- Surgeons and residents performed laparoscopic knot tying, needle passing, and cylinder manipulation tasks under varying time delays (50 ms increments).
Main Results:
- Task completion time significantly increased with incremental visual delay (p < 0.001).
- Dexterity was significantly impaired at 0.25s delay (p <= 0.05).
- A 'move-and-wait' strategy emerged as a compensatory mechanism at higher delays (up to 0.4s).
Conclusions:
- Visual delay necessitates adaptive strategies, including slower manipulation and a 'move-and-wait' approach.
- Latency introduces performance encumbrances: increased time, reduced accuracy, diminished dexterity, and fatigue.
- Optimizing human and digital compensatory mechanisms is crucial for advancing telerobotic surgery.
