Does preserved kidney volume predict 1 year donor renal function after laparoscopic living donor nephrectomy?

Area of Science:

• Nephrology
• Transplant Surgery
• Medical Imaging

Background:

• Living kidney donation is crucial for addressing organ shortages.
• Assessing donor renal function post-nephrectomy is vital for donor safety.
• Predicting long-term renal function in donors requires robust metrics.

Purpose of the Study:

• To determine if preserved kidney volume predicts donor renal function one year after laparoscopic living donor nephrectomy.
• To identify key factors influencing estimated glomerular filtration rate (eGFR) in kidney donors post-surgery.

Main Methods:

• Retrospective review of 140 laparoscopic living donor nephrectomy cases (2006-2010).
• Computed tomography (CT) scans used for automated kidney volume estimation.
• Kidney volume adjusted for body surface area and split volume calculated.
• eGFR estimated using the Modification of Diet in Renal Disease (MDRD) equation.
• Multiple linear regression analysis to identify predictors of 1-year eGFR.

Main Results:

• Adjusted preserved kidney volume, donor age, and preoperative eGFR were independent predictors of 1-year eGFR (p < 0.05).
• Split kidney volume did not show a statistically significant relationship with 1-year eGFR (p = 0.47).
• Median eGFR decreased from 92.4 mL/min/1.73 m² pre-donation to 61.2 mL/min/1.73 m² at 1 year post-surgery.

Conclusions:

• Pre-donation kidney volume adjusted for body surface area is a significant predictor of donor renal function one year post-nephrectomy.
• This adjusted kidney volume metric may assist in donor selection to preserve long-term renal function.
• Careful consideration of donor kidney size relative to body size is recommended for optimizing living kidney donation outcomes.