The LiMAx test: a new liver function test for predicting postoperative outcome in liver surgery

Area of Science:

• Hepatology
• Surgical Oncology
• Medical Diagnostics

Background:

• Liver failure is a significant post-hepatectomy mortality cause, difficult to predict preoperatively.
• The study introduces the LiMAx test for clinical use in managing hepatic tumors.
• An algorithm for LiMAx test application in liver surgery is presented.

Purpose of the Study:

• To evaluate the clinical utility of the LiMAx test in predicting outcomes after hepatectomy for hepatic tumors.
• To introduce and assess an algorithm for integrating the LiMAx test into clinical decision-making for liver surgery.
• To determine if the LiMAx test and associated algorithm can improve patient outcomes and reduce mortality.

Main Methods:

• Perioperative assessment of patients with hepatic tumors undergoing hepatectomy using the LiMAx test.
• Inclusion of preoperative three-dimensional virtual resection analysis in one case.
• Development and prospective application of a decision tree algorithm based on LiMAx values.

Main Results:

• Preoperative LiMAx values were higher in patients who underwent resection compared to those who did not (P=0.009).
• Postoperative mortality rates significantly correlated with LiMAx values: <80 µg/kg/h (38.1%), 80-100 µg/kg/h (10.5%), and >100 µg/kg/h (1.0%) (P < 0.0001).
• Prospective application of the LiMAx decision tree reduced mortality from 9.4% to 3.4% (P=0.019).

Conclusions:

• The LiMAx test is a valid and clinically feasible method for determining liver function capacity.
• Combining LiMAx testing with virtual resection may allow calculation of residual liver function.
• The LiMAx decision tree algorithm shows potential to significantly enhance preoperative evaluation and postoperative outcomes in liver surgery.