Robot-assisted partial nephrectomy: analysis of the first 100 cases from a single institution

Area of Science:

• Urology
• Minimally Invasive Surgery
• Robotic Surgery

Background:

• Robot-assisted partial nephrectomy (RAPN) offers an alternative to traditional open and laparoscopic approaches for small renal tumors.
• Evaluating the initial experience and learning curve is crucial for adopting new surgical techniques.

Purpose of the Study:

• To report short-term outcomes of the first 100 RAPN cases at a single institution.
• To assess the impact of the learning curve on perioperative outcomes.
• To identify factors associated with adverse outcomes in RAPN.

Main Methods:

• Retrospective review of 100 RAPN cases performed by three surgeons.
• Cases divided into two groups (first 50 vs. last 50) to analyze the learning curve.
• Multivariate analysis to identify predictors of operative time, blood loss, and renal function changes.

Main Results:

• Median warm ischemia time was 24 minutes; median follow-up was 13.4 months.
• Postoperative GFR decreased by a median of -6.6 mL/min/1.73 m².
• Operative time was significantly longer in the initial learning phase (Group 1) compared to the later phase (Group 2).
• Male gender and higher nephrometry scores were associated with increased operative time and blood loss.
• Higher nephrometry scores, endophytic, and hilar tumors correlated with greater GFR reduction.

Conclusions:

• RAPN is a safe procedure for small renal tumors.
• The primary learning curve effect is on operative time, which decreases with experience.
• Warm ischemia times are acceptable, and specific patient/tumor factors may predict longer operative times and blood loss.