Mechanical Vent 2 Exam 2 Practice

Elevated ammonia levels point to impaired detoxification of ammonia by the liver. Ammonia is produced in the gut by bacterial metabolism of proteins, and the liver normally converts it to urea via the urea cycle for excretion by the kidneys. When liver function is compromised, this conversion slows or fails, allowing ammonia to accumulate in the blood. The excess ammonia can affect the brain, leading to hepatic encephalopathy, with symptoms from confusion to coma. Hyperthyroidism and anemia don’t directly drive ammonia buildup, and while kidney function affects waste excretion, the primary link for high ammonia is liver disease.