Long-term renal function in kidney donors. Sustained compensatory hyperfiltration with no adverse effects

Area of Science:

• Nephrology
• Transplantation Surgery
• Long-term Health Outcomes

Background:

• Uninephrectomy for kidney donation leaves individuals with a solitary kidney.
• Understanding the long-term renal function and health of kidney donors is crucial.

Purpose of the Study:

• To assess the long-term renal function and blood pressure of kidney donors after uninephrectomy.
• To evaluate the effects of compensatory hyperfiltration on kidney health over many years.

Main Methods:

• Long-term follow-up study of twenty kidney donors who underwent uninephrectomy between 1964 and 1968.
• Assessment of creatinine clearance, blood pressure, and urine protein excretion at various intervals post-donation.

Main Results:

• Mean follow-up was 15.8 years.
• Creatinine clearance remained stable, averaging 80 ml/min, with post-donation levels reaching 78% of predonation levels by 14-18 years.
• 24-hour urine protein excretion was significantly higher in donors than controls, though urinary albumin excretion was normal.

Conclusions:

• Kidney donation via uninephrectomy does not result in adverse long-term effects on blood pressure or renal function.
• Compensatory hyperfiltration in solitary kidneys appears safe over extended periods.
• Slightly elevated nonalbumin proteinuria warrants further investigation but does not indicate significant renal damage.