Decrease of renal function due to warm ischemia after laparoscopic partial nephrectomy: evaluation using 99mTc-DMSA...

Area of Science:

• Nephrology
• Nuclear Medicine
• Surgical Research

Background:

• Warm ischemia during surgery can impair kidney function.
• Assessing renal function post-surgery is crucial for patient outcomes.
• Technetium-99m-dimercaptosuccinic acid ((99m)Tc-DMSA) scintigraphy is a tool for evaluating kidney function.

Purpose of the Study:

• To evaluate the impact of warm ischemia duration on renal function.
• To determine if prolonged warm ischemia causes significant kidney damage.
• To utilize (99m)Tc-DMSA scans to quantify changes in renal function.

Main Methods:

• 19 patients undergoing surgery with potential warm ischemia were studied.
• (99m)Tc-DMSA scans were performed pre-operatively and at 1, 3, and 6 months post-operatively.
• Patients were grouped by warm ischemic time (<40 min, 40-60 min, >60 min) and renal function reduction was calculated.

Main Results:

• A trend towards greater renal function reduction was observed in the longest ischemia group (C: >60 min) at 1 and 3 months.
• A statistically significant difference in renal function reduction was found between groups at 6 months (p=0.02).
• Post-hoc analysis showed a significant difference between the shortest (<40 min) and longest (>60 min) ischemia groups (p<0.05).

Conclusions:

• Prolonged warm ischemia time is associated with significant kidney damage.
• (99m)Tc-DMSA scintigraphy effectively quantifies renal function impairment after ischemic events.
• Surgical strategies to minimize warm ischemia duration are important for preserving renal function.