Management of Hepatic Encephalopathy

Diagnosis and Initial Assessment

The American Association for the Study of Liver Diseases recommends measuring plasma ammonia levels in patients with suspected hepatic encephalopathy, as a normal value brings the diagnosis into question and should prompt investigation for alternative causes 3
Brain imaging should be performed to exclude structural lesions in patients with unexplained alteration of brain function 4
Patients with hepatic encephalopathy should be systematically evaluated for signs of the condition, including asterixis, psychomotor slowing, sleep-wake inversion, and temporospatial disorientation 1
The severity of hepatic encephalopathy should be classified using a grading system (I-IV) to guide management decisions, with Grade I being mild alterations in consciousness and Grade IV being comatose and unresponsive 1, 5

The European Association for the Study of the Liver recommends addressing precipitating factors, which are present in approximately 50% of cases and lead to improvement in 90% of cases when corrected 6
Common precipitating factors include infections, gastrointestinal bleeding, constipation, dehydration, electrolyte disturbances, and medications such as sedatives and benzodiazepines 1, 7
Lactulose is recommended as first-line treatment, with an initial dose of 25 ml orally every 12 hours, titrated to achieve 2-3 soft stools per day 2
Rifaximin is recommended as second-line or add-on treatment, with a dosage of 550 mg orally twice daily, to reduce the risk of overt hepatic encephalopathy recurrence 2

The American College of Gastroenterology recommends monitoring sodium levels closely, as hyponatremia is an independent risk factor for hepatic encephalopathy with a critical threshold of 130 mmol/L 7
Proton pump inhibitors should be avoided due to the increased risk of hepatic encephalopathy, and benzodiazepines should be contraindicated in patients with decompensated cirrhosis 7
Secondary prophylaxis with lactulose should be continued after the first episode of overt hepatic encephalopathy 4
Liver transplantation evaluation should be considered for patients with recurrent or intractable hepatic encephalopathy 4, 2