Liver function tests in surgical infection and malnutrition

Area of Science:

• Surgical Patient Care
• Infectious Disease Management
• Hepatology

Background:

• Abnormal liver function tests are common in chronically infected surgical patients.
• The role of infection versus malnutrition in these abnormalities is unclear.
• Standard liver function tests (LFTs) are widely used in clinical practice.

Purpose of the Study:

• To investigate the primary cause of abnormal LFTs in chronically infected surgical patients.
• To determine if malnutrition or infection is the main driver of hepatic dysfunction.
• To assess the utility of LFTs in diagnosing and monitoring intra-abdominal sepsis.

Main Methods:

• Comparative study design involving four groups: chronically infected surgical patients, recovered patients, nonseptic malnourished patients, and healthy controls.
• Standard liver function tests were performed on all participants.
• Clinical data on infection status, nutritional status, and recovery were collected.

Main Results:

• Septic patients exhibited abnormal LFTs.
• LFTs normalized in patients after recovery from infection, even with continued weight loss.
• Nonseptic malnourished patients showed normal LFTs.
• Infection was identified as the primary cause of abnormal LFTs, not malnutrition.

Conclusions:

• Chronic infection, particularly intra-abdominal sepsis, is the major cause of abnormal liver function tests in surgical patients.
• Normal LFTs in malnourished, nonseptic individuals support infection as the key factor.
• Standard LFTs are valuable tools for diagnosing occult intra-abdominal sepsis and evaluating treatment effectiveness.