Hepatic outflow occlusion in laparoscopic hepatectomy

Area of Science:

• Minimally invasive surgery
• Surgical innovation
• Hepatobiliary surgery

Background:

• Laparoscopic liver resection is limited by risks of bleeding and gas embolism from hepatic vein injury.
• A specialized balloon catheter was developed to control hepatic vein flow during laparoscopic procedures.

Purpose of the Study:

• To evaluate the safety and efficacy of a novel balloon catheter for occluding hepatic venous outflow during experimental laparoscopic hepatectomy.
• To assess the hemodynamic tolerance of animals to the occlusion technique.

Main Methods:

• A custom balloon catheter was inserted into the inferior vena cava (IVC) in 8 pigs undergoing laparoscopic left hemihepatectomy.
• Angiography confirmed IVC occlusion, while a central channel maintained blood flow. Hemodynamic parameters were monitored.
• Liver resection was performed using laparoscopic instruments.

Main Results:

• The balloon catheter successfully occluded hepatic venous outflow, reducing flow to 16% of baseline.
• Hemodynamic changes, including decreased arterial pressure and cardiac output, were observed but reversible upon deflation.
• Laparoscopic left hemihepatectomy was completed in all animals with minimal blood loss (166 ml) and a mean occlusion time of 30 minutes.

Conclusions:

• The developed balloon catheter effectively occludes hepatic venous outflow and is well-tolerated hemodynamically.
• This technique represents a potential advancement for safely performing major laparoscopic hepatectomy in humans.