Recovery of renal function after open and laparoscopic partial nephrectomy

Area of Science:

• Nephrology
• Urologic Oncology
• Surgical Innovation

Background:

• Renal function data after partial nephrectomy are limited.
• Oncologic outcomes are comparable between laparoscopic (LPN) and open (OPN) partial nephrectomy.
• The impact of surgical approach on long-term renal function remains unclear.

Purpose of the Study:

• To compare the change in renal function over time following LPN versus OPN.
• To assess the differential impact of surgical approach on kidney function recovery.
• To provide data on renal function outcomes after partial nephrectomy.

Main Methods:

• Retrospective analysis of 987 patients undergoing LPN (n=182) or OPN (n=805) for sporadic renal tumors.
• Estimated glomerular filtration rate (eGFR) calculated using the abbreviated Modification of Diet in Renal Disease formula.
• Multivariable generalized estimating equations model used to predict eGFR based on time, surgical approach, and clinical factors.

Main Results:

• LPN group had a lower baseline eGFR but shorter ischemia times.
• A statistically significant interaction between time and surgical approach indicated differential renal function recovery.
• Laparoscopic partial nephrectomy patients demonstrated slightly better renal function maintenance post-surgery compared to open procedures.

Conclusions:

• Surgical approach has a minor but significant effect on renal function recovery after partial nephrectomy.
• Laparoscopic partial nephrectomy is associated with slightly superior preservation of renal function.
• These findings contribute to understanding the functional consequences of different partial nephrectomy techniques.