Functional recovery after partial nephrectomy in a solitary kidney

Area of Science:

• Nephrology
• Urology
• Surgical Oncology

Background:

• Partial nephrectomy (PN) is standard for renal mass in a solitary kidney (RMSK).
• Factors influencing functional recovery after PN in RMSK are not well understood.
• Understanding these factors is crucial for optimizing patient outcomes.

Purpose of the Study:

• To identify factors predicting acute kidney injury (AKI) after PN in RMSK.
• To determine predictors of functional recovery (Rec-Ischemia) post-PN for RMSK.
• To analyze the impact of parenchymal volume preservation and ischemia on renal function.

Main Methods:

• Retrospective analysis of 841 patients with RMSK undergoing PN.
• Classification of AKI using RIFLE criteria.
• Analysis of functional data, including glomerular filtration rate (GFR) and parenchymal volume preserved, using logistic and multivariable linear regression.

Main Results:

• Parenchymal volume preservation was the strongest predictor of functional recovery (r=0.84, p < 0.001).
• Ischemia time was the only independent predictor of AKI (52% incidence).
• Increased age, warm ischemia, and AKI independently predicted reduced functional recovery.

Conclusions:

• Parenchymal volume preservation is the predominant factor for functional recovery after PN in RMSK.
• While ischemia, AKI, and age play roles, their impact is less significant than volume preservation.
• Long-term renal function is generally stable, with dialysis infrequently required.