Laparoscopic partial nephrectomy in the pig: comparison of three hemostasis techniques

Area of Science:

• Minimally Invasive Surgery
• Urological Surgery
• Surgical Technology

Background:

• Controlling intraoperative bleeding is a major challenge in laparoscopic partial nephrectomy.
• Evaluating hemostasis techniques is crucial for improving surgical outcomes in nephron-sparing procedures.

Purpose of the Study:

• To compare the efficacy and morbidity of three renal parenchymal hemostasis techniques.
• Techniques evaluated: high-frequency bipolar electrical current, high-frequency unipolar spray electrical current, and ultrasound.
• Study performed during laparoscopic partial nephrectomy in pigs without vascular control.

Main Methods:

• Standardized laparoscopic partial nephrectomy performed on 27 pigs.
• Pigs divided into three groups based on hemostasis technology: bipolar, unipolar spray, or ultrasound.
• Evaluated intraoperative/postoperative complications, blood loss, renal function, and parenchymal lesion thickness.

Main Results:

• All procedures were completed laparoscopically; no intraoperative deaths occurred.
• Ultrasound group showed significantly lower blood loss (P = 0.026).
• No significant differences in renal function or parenchymal lesion thickness (necrosis/fibrosis) among groups.

Conclusions:

• Laparoscopic partial nephrectomy without vascular control is feasible in pigs.
• Ultrasound coagulation offers an advantage in limiting blood loss compared to bipolar or unipolar electrical currents.
• Ultrasound did not provide additional benefit in preserving renal parenchyma.