Laparoscopic partial nephrectomy using the potassium titanyl phosphate laser in a porcine model

Area of Science:

• Urology
• Minimally Invasive Surgery
• Laser Technology

Background:

• Evaluating the efficacy of the potassium titanyl phosphate (KTP) Greenlight laser for partial nephrectomy.
• Assessing the feasibility of KTP laser partial nephrectomy in a porcine model.

Purpose of the Study:

• To determine the potential and feasibility of using the KTP Greenlight laser for laparoscopic partial nephrectomy.
• To establish a porcine model for evaluating this novel surgical technique.

Main Methods:

• 15 laparoscopic partial nephrectomies performed in 4 pigs under anesthesia.
• Utilized an 80-W KTP laser for bilateral upper and lower pole nephrectomies without renal cooling or vessel clamping.
• Monitored blood loss, operating time, and smoke formation; performed histopathologic analysis of specimens.

Main Results:

• Successful completion of all procedures with minimal estimated blood loss (<30 mL).
• Mean operating time of 42 minutes; only one instance required additional hemostasis.
• Histopathology revealed minimal changes at the resection line (<1 mm).
• Smoke formation intermittently reduced visibility during the procedure.

Conclusions:

• Demonstrated the feasibility and efficacy of KTP laser partial nephrectomy in a normally perfused porcine model.
• The KTP laser provides excellent renal parenchymal hemostatic ablation.
• Ongoing efforts focus on mitigating smoke formation to enhance visibility for future human clinical trials.