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Robot-assisted partial nephrectomy: continued refinement of outcomes beyond the initial learning curve
David J Paulucci1, Ronney Abaza2, Daniel D Eun3
1Department of Urology, Icahn School of Medicine at Mount Sinai Hospital, New York, NY, USA.
BJU International
|November 19, 2016
Summary
Robot-assisted partial nephrectomy (RAPN) outcomes improve with surgeon experience beyond the initial learning curve, showing better trifecta achievement and shorter warm ischaemia time. Continued refinement in outcomes, including reduced blood loss and hospital stay, occurs up to 300 procedures.
Area of Science:
- Urology
- Minimally Invasive Surgery
- Surgical Outcomes Research
Background:
- Robot-assisted partial nephrectomy (RAPN) is increasingly utilized for renal tumor ablation.
- Understanding the impact of surgeon experience beyond the initial learning curve (LC) is crucial for optimizing patient outcomes.
- Evaluating trends in peri-operative results is essential for establishing best practices in RAPN.
Purpose of the Study:
- To assess the evolution of peri-operative outcomes in robot-assisted partial nephrectomy (RAPN) cases performed after the initial learning curve (LC).
- To identify trends in outcomes related to surgeon experience in RAPN.
- To compare outcomes between early (50-99) and later (250-300) cases to quantify improvements.
Main Methods:
- A multi-institutional database analysis of 960 consecutive RAPN cases (50-300) from 2008-2016 involving four experienced surgeons.
- Multivariable regression models were used to analyze trends in patient demographics, tumor characteristics, and peri-operative outcomes (WIT, operating time, complications, EBL, trifecta achievement).
- Outcomes for cases 50-99 were compared with cases 250-300.
Main Results:
- RAPN was increasingly performed for larger tumors and patients with more comorbidities (hypertension, diabetes, prior abdominal surgery).
- Surgeon experience correlated with improved trifecta achievement, shorter warm ischaemia time (WIT), less estimated blood loss (EBL), fewer transfusions, and reduced hospital stay.
- Tumor size and WIT were significantly reduced in later cases (250-300) compared to earlier cases (50-99).
Conclusions:
- Peri-operative outcomes in RAPN continue to refine beyond the initial learning curve, even with increasing tumor complexity and patient comorbidities.
- While safe outcomes are achievable early, continuous improvement in trifecta achievement, WIT, EBL, blood transfusions, and hospitalization duration is observed up to 300 procedures.
- Surgeon experience plays a significant role in enhancing RAPN efficiency and patient outcomes.
