Followup of unilateral renal function after laparoscopic partial nephrectomy

Area of Science:

• Nephrology
• Urology
• Surgical Oncology

Background:

• Laparoscopic partial nephrectomy (LPN) is a standard treatment for renal tumors.
• Assessing changes in unilateral renal function post-LPN is crucial for patient outcomes.
• Identifying predictors of renal function decline is essential for surgical decision-making.

Purpose of the Study:

• To evaluate the change in unilateral renal function after LPN.
• To identify factors influencing renal function recovery post-LPN.
• To determine predictors of postoperative glomerular filtration rate (GFR) decrease.

Main Methods:

• Prospective data from 116 patients undergoing LPN were analyzed.
• Glomerular filtration rate (GFR) of the operated kidney was measured using diethylenetriaminepentaacetic acid scans preoperatively and up to 3 years postoperatively.
• Kidney volume reduction and clinicopathological/operative factors were assessed to identify predictors of GFR change.

Main Results:

• A significant decrease in GFR was observed by 3 months post-LPN, with a trend toward recovery up to 3 years.
• Individual recovery was influenced by patient age, comorbidities, tumor size, kidney volume reduction, and collecting system repair.
• Independent predictors of postoperative GFR decrease included preoperative GFR, renal parenchymal volume reduction, and pelvicalyceal system repair.

Conclusions:

• Renal function after LPN significantly decreases initially but shows progressive recovery over time.
• While patient-related factors and tumor characteristics influence recovery, renal parenchymal volume reduction and pelvicalyceal system repair are independent predictors of GFR decrease.