Serum zinc levels in hepatic encephalopathy

Area of Science:

• Hepatology
• Biochemistry
• Clinical Medicine

Background:

• Zinc is a vital mineral for numerous bodily metabolic functions.
• Reduced serum zinc concentrations are observed in liver diseases, suggesting a potential role in precipitating hepatic encephalopathy.

Purpose of the Study:

• To investigate the association between serum zinc levels and hepatic encephalopathy in patients with various forms of liver disease.
• To correlate serum zinc levels with clinical and biochemical parameters and patient outcomes.

Main Methods:

• Prospective study of consecutive patients with fulminant hepatic failure, subacute hepatic failure, and chronic liver disease with encephalopathy.
• Serum zinc levels measured using atomic absorption spectrometry at admission and 24 hours post-recovery in survivors.
• Correlation analysis with clinical and biochemical parameters (bilirubin, prothrombin time) and patient outcomes.

Main Results:

• Patients with hepatic encephalopathy exhibited significantly lower serum zinc levels compared to controls.
• Elevated serum bilirubin and prolonged prothrombin time showed an inverse relationship with serum zinc levels.
• No correlation was found between serum zinc levels and age, sex, encephalopathy grade/duration, liver size, ascites, or splenomegaly.

Conclusions:

• Hepatic encephalopathy is strongly associated with diminished serum zinc levels.
• Patient recovery can occur despite persistently low serum zinc levels.
• Serum bilirubin > 23 mg/dL and prothrombin time > 12 seconds above control are inversely correlated with serum zinc levels.