Which laboratory finding is commonly elevated in hepatic dysfunction and can indicate hepatic encephalopathy?

• A. Ammonia
• B. Sodium
• C. Calcium
• D. Magnesium

Answer: (A)

Ammonia levels rise when the liver can’t detoxify it properly. In hepatic dysfunction, the liver’s ability to convert ammonia into urea diminishes, so ammonia accumulates in the blood. This ammonia then crosses into the brain and disrupts neurotransmission, leading to symptoms of hepatic encephalopathy such as confusion, personality changes, and neuromuscular abnormalities like asterixis. Among the minerals listed, sodium, calcium, and magnesium aren’t specifically elevated due to hepatic encephalopathy, so they aren’t the hallmark indicators of this condition. Elevated ammonia is the classic finding that points toward hepatic encephalopathy in the context of liver dysfunction.