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Surgical skill analysis focused on tissue traction in laparoscopic wet lab training
Koki Ebina1, Takashige Abe2, Madoka Higuchi2
1Graduate School of Information Science and Technology, Hokkaido University, Sapporo, Japan.
Surgery Open Science
|December 16, 2024
Summary
Expert surgeons exhibit precise left-hand techniques in laparoscopic dissection, using fewer grasps and maintaining stable traction. This study identifies key metrics for efficient tissue handling, aiming to shorten surgical training curves.
Area of Science:
- Minimally Invasive Surgery
- Surgical Skills Assessment
- Surgical Robotics and Technology
Background:
- Laparoscopic tissue dissection is a critical surgical skill.
- Understanding expert left-hand manipulation is essential for improving surgical training.
- Objective metrics are needed to quantify skill differences in laparoscopic procedures.
Purpose of the Study:
- To elucidate the distinct characteristics of an expert's non-dominant (left) hand during laparoscopic tissue dissection.
- To identify quantifiable metrics associated with surgical proficiency in laparoscopic tasks.
- To establish a foundation for developing targeted feedback systems to accelerate surgical learning.
Main Methods:
- Participants performed porcine aorta tissue dissection while grasping force and forceps location were recorded.
- Motion capture (Mocap) and custom-designed sensor forceps were utilized for data acquisition.
- Trainees were categorized into novice, intermediate, and expert groups based on Global Operative Assessment of Laparoscopic Skills (GOALS) scores, with statistical comparisons using Kruskal-Wallis tests and Principal Component Analysis (PCA).
Main Results:
- Experts demonstrated significantly fewer tissue regrasps (52.0) compared to novices (268.0).
- Stable traction angles (23.75°) and reduced grasping force near the aorta (10.91%) were characteristic of expert performance.
- PCA identified efficiency (number of grasps) and effective traction (grasping position and area distribution) as primary differentiators of surgical skill.
Conclusions:
- Expert left-hand use in laparoscopy involves precise grasping, effective tissue traction, and stable manipulation.
- These findings highlight objective indicators of surgical expertise.
- Future work will focus on implementing immediate feedback systems to reduce the learning curve for surgical trainees.
