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Published on: February 2, 2021
Correlation of the RENAL nephrometry score with warm ischemia time after robotic partial nephrectomy
Fatih Altunrende1, Humberto Laydner, Adrian V Hernandez
1Center for Laparoscopic and Robotic Surgery-Urology, Glickman Urology and Kidney Institute, Cleveland Clinic Foundation, 9500, Euclid Avenue, Q10-1, Cleveland, OH, 44195, USA.
The RENAL nephrometry score (RNS) helps predict warm ischemia time (WIT) during robotic partial nephrectomy (RPN). Tumor size (R), endophytic properties (E), and proximity to the collecting system (N) significantly impact WIT, while anterior/posterior location (A) and polar line location (L) do not.
Area of Science:
- Urology
- Surgical Oncology
- Medical Imaging Analysis
Background:
- The RENAL nephrometry score (RNS) quantifies renal tumor complexity.
- Robotic partial nephrectomy (RPN) is a common procedure for kidney tumor removal.
- Warm ischemia time (WIT) is a critical factor affecting renal function post-nephrectomy.
Purpose of the Study:
- To evaluate the impact of individual RENAL nephrometry score (RNS) categories on warm ischemia time (WIT) in patients undergoing robotic partial nephrectomy (RPN).
- To identify which RNS components are most predictive of WIT during RPN.
Main Methods:
- Retrospective analysis of 251 consecutive patients undergoing RPN.
- RENAL nephrometry score (RNS) determined from imaging for 187 patients.
- Univariable and multivariable regression analyses to correlate RNS components with WIT.
Main Results:
- Overall RNS complexity varied, with 45% low, 43% moderate, and 12% high.
- Tumor size (R), endophytic properties (E), and proximity to collecting system (N) were significantly associated with longer WIT.
- Anterior/posterior location (A) and location between polar lines (L) did not significantly impact WIT.
Conclusions:
- The RNS is a valuable tool for predicting WIT during RPN.
- Specific RNS components (R, E, N) are key determinants of WIT.
- Findings aid in preoperative counseling and surgical planning for RPN.
