Renal function after partial nephrectomy with the Nd-YAG laser. Experimental study in piglets

Area of Science:

• Urology
• Surgical Technology
• Nephrology

Background:

• Partial nephrectomy is crucial for preserving renal function.
• Evaluating novel surgical techniques is essential for improving patient outcomes.
• The Nd:YAG laser offers potential advantages in hemostasis and precision during partial nephrectomy.

Purpose of the Study:

• To compare the efficacy of a combination (contact and non-contact) Nd:YAG laser technique versus a traditional steel scalpel for partial nephrectomy.
• To assess the impact of these techniques on renal function in a porcine model.

Main Methods:

• Twelve partial nephrectomies were performed in piglets using either Nd:YAG laser or steel scalpel.
• Renal function was evaluated using serum creatinine, urea levels, and 99mTc-DTPA renography pre-operatively and at 1 and 2 weeks post-operatively.
• The renal artery was not clamped, and renal cooling was not performed.

Main Results:

• Serum creatinine levels increased post-operatively in both groups, with comparable trends between laser and scalpel at 2 weeks.
• Serum urea levels showed a higher increase in the laser group at 1 week, but differences narrowed by 2 weeks.
• 99mTc-DTPA renography indicated a greater reduction in the DTPA disappearance rate in the laser group at 2 weeks, suggesting a potential, though not statistically significant, difference in renal clearance.

Conclusions:

• The Nd:YAG combination laser technique for partial nephrectomy demonstrated no significant difference in preserving renal function compared to the steel scalpel.
• Both techniques resulted in temporary elevations in serum creatinine and urea, with comparable recovery trajectories.
• Further research may be warranted to explore long-term functional outcomes and optimize laser parameters for partial nephrectomy.