Mannitol has no impact on renal function after open partial nephrectomy in solitary kidneys

Area of Science:

• Nephrology
• Urology
• Surgical Oncology

Background:

• Mannitol is used during partial nephrectomy to protect kidneys from ischemic damage.
• High-level clinical evidence supporting mannitol's effectiveness in this context is lacking.

Purpose of the Study:

• To evaluate the effect of mannitol on postoperative renal function after open partial nephrectomy.
• To compare renal function outcomes between patients who received mannitol and those who did not.

Main Methods:

• Retrospective review of 55 patients undergoing open partial nephrectomy for renal cancer in a solitary kidney.
• Comparison of postoperative estimated glomerular filtration rate (eGFR), eGFR decrease rate, and incidence of acute kidney injury requiring dialysis between mannitol (M+) and no-mannitol (M-) groups.
• Follow-up duration of at least 6 months postoperatively.

Main Results:

• No significant differences in perioperative patient characteristics between the M+ and M- groups.
• Mannitol did not significantly alter postoperative eGFR or its decrease rate within 6 months.
• Incidence of acute kidney injury requiring dialysis was similar: 5.0% in M+ vs. 5.7% in M-.

Conclusions:

• Mannitol administration during open partial nephrectomy does not appear to offer significant renal protective benefits.
• Further high-level clinical trials may be warranted to definitively establish mannitol's role, if any, in this procedure.