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Laparoscopic Anatomical Liver Segment VII Resection with Liver Parenchymal Transection Following a Priority Approach
Published on: May 23, 2025
152
Graduated Autonomy of Laparoscopic Liver Resection Based on Liver Resection Complexity: a Western and Eastern
Alessandro D Mazzotta1, Yoshikuni Kawaguchi2, Kyoij Ito2
1From the Department of Digestive, Oncological and Metabolic Surgery, Institut Mutualiste Montsouris, Paris, France (Mazzotta, Diab, Tribillon, Gayet, Soubrane).
Journal of the American College of Surgeons
|August 21, 2024
Summary
Surgeons need 40 low-grade, then 30 intermediate-grade laparoscopic liver resections before attempting complex cases. This progression improves surgical outcomes and reduces complications for safer high-complexity procedures.
Area of Science:
- Hepatobiliary Surgery
- Minimally Invasive Surgery
- Surgical Education
Background:
- Laparoscopic liver resection (LLR) demands advanced hepatobiliary and minimally invasive surgical skills.
- A 3-level complexity classification (grades I-III) for LLR was previously established based on intraoperative outcomes.
- The study aimed to evaluate the learning curve for each LLR complexity grade.
Purpose of the Study:
- To determine the learning curve effect for each complexity grade of laparoscopic liver resection (LLR).
- To establish the experience required for surgeons to safely progress through LLR complexity grades.
- To assess the impact of a structured learning progression on surgical outcomes.
Main Methods:
- Analysis of LLR cases performed between 1994-2020 (Institut Mutualiste Montsouris) and 2008-2023 (University of Tokyo).
- Standardized (cumulative sum) analysis of operating time to evaluate the learning curve for each complexity grade (I, II, III).
- Comparison of surgical outcomes and postoperative complications between pre-learning and post-learning cohorts.
Main Results:
- The learning curve for operating time was identified at approximately 40 cases for grade I, 30 for grade II, and 50 for grade III LLR.
- Post-learning cohorts demonstrated generally improved surgical outcomes and reduced postoperative complications compared to pre-learning cohorts.
- These findings were consistent across both institutions studied.
Conclusions:
- A structured progression through LLR complexity is recommended: 40 cases of grade I, followed by 30 cases of grade II, before undertaking grade III procedures.
- This gradual approach to increasing complexity is crucial for the safe implementation of high-complexity LLR.
- Adherence to this learning pathway can enhance surgical proficiency and patient safety in LLR.
