A prospective randomized study in 100 consecutive patients undergoing major liver resection with versus without...

Area of Science:

• Hepatobiliary Surgery
• Surgical Physiology
• Ischemic Tolerance

Background:

• Ischemic preconditioning (IP) shows promise in animal models and limited human studies for liver protection.
• Its efficacy in diverse liver resections and extended ischemia durations remains unclear.
• This study investigates IP's impact in major liver surgery.

Purpose of the Study:

• To assess the protective effects of ischemic preconditioning in a large cohort of unselected patients undergoing major liver resection.
• To identify factors influencing the protective benefits of ischemic preconditioning.
• To explore the mechanism of protection, including ATP preservation.

Main Methods:

• A prospective randomized study of 100 patients undergoing major liver resection with >30 minutes of inflow occlusion.
• Patients were randomized to receive or not receive an ischemic preconditioning protocol (10 min ischemia/10 min reperfusion).
• Univariate and multivariate analyses identified factors affecting IP benefits; ATP content was measured.

Main Results:

• Preconditioned patients had significantly lower postoperative AST and ALT levels compared to controls.
• IP benefit was greater in younger patients, those with longer occlusion (up to 60 min), and smaller resected liver volumes (<50%).
• Patients with steatosis showed particular protection; ATP was preserved in young patients' liver tissue.

Conclusions:

• Ischemic preconditioning is a validated protective strategy against hepatic ischemia in human liver surgery.
• The technique is highly effective for young patients, prolonged ischemia, and those with steatosis, potentially via ATP preservation.
• Alternative strategies are necessary for older patients requiring liver resection.