Hepatic encephalopathy typically results from dysfunction of which organ?

Hepatic encephalopathy typically results from dysfunction of which organ?

• A. Kidney failure
• B. Liver failure
• C. Heart failure
• D. Lung disease

Answer: (B)

Hepatic encephalopathy happens because the liver isn’t able to detoxify toxins in the blood. The liver normally converts ammonia, a byproduct of protein metabolism, into urea for excretion. When the liver fails, ammonia and other toxins accumulate and can cross into the brain, disrupting neural function and leading to mental status changes from confusion to coma. This is why the liver is the organ involved. The other options describe problems that don’t cause the same toxin buildup in the brain—kidney failure leads to a different toxin profile (uremic encephalopathy), while heart failure or lung disease primarily affect perfusion or gas exchange rather than detoxification of ammonia.

Hepatic encephalopathy happens because the liver isn’t able to detoxify toxins in the blood. The liver normally converts ammonia, a byproduct of protein metabolism, into urea for excretion. When the liver fails, ammonia and other toxins accumulate and can cross into the brain, disrupting neural function and leading to mental status changes from confusion to coma. This is why the liver is the organ involved. The other options describe problems that don’t cause the same toxin buildup in the brain—kidney failure leads to a different toxin profile (uremic encephalopathy), while heart failure or lung disease primarily affect perfusion or gas exchange rather than detoxification of ammonia.