Compare conditions

Put any two — or three — conditions side by side, adult or pediatric, to spot the look-alike differences fast, row by row.

Hepatic Encephalopathy

—

In one line

·The liver is not cleaning ammonia and other toxic waste from the blood, so poison reaches the brain.

—

Normal physiology

·The liver sits in the upper-right belly and acts as the body's main detox factory. Blood from the intestines (carrying nutrients and waste) flows through the portal vein into the liver, where liver cells scrub out toxins—especially ammonia—before the blood goes back to the heart and out to the rest of the body, including the brain.

—

What goes wrong

·The liver loses its ability to clean ammonia, or blood finds a shortcut around the liver, so ammonia floods into the bloodstream and crosses into the brain. Then a trigger—like bleeding, infection, or constipation—pushes ammonia even higher and tips the brain into confusion.

—

Hallmark signs

·Confusion and trouble thinking clearly
·Sleeping during the day but awake at night (flipped sleep schedule)
·Hand tremor or flapping (asterixis)
·Slurred speech or mumbling
·Personality changes (irritability, apathy, or acting out of character)
·Slow responses or seeming 'out of it'
·Unsteady walk or trouble balancing
·Deep sleepiness or coma (in severe cases)

—

Red flags · escalate now

·Sudden deep confusion or inability to wake the person (coma) — the brain is being poisoned fast and may swell or stop working.
·New seizures or uncontrolled shaking — extremely high ammonia or swelling in the brain can trigger abnormal electrical storms.
·Vomiting blood or black tarry stools in a person with liver disease — bleeding inside the gut dumps more protein (which becomes ammonia) into the system and can trigger or worsen brain poisoning.
·Fever and worsening confusion together — may signal an infection (like spontaneous bacterial peritonitis) that is pushing the sick liver over the edge.
·Very slow breathing or gasping — the brainstem centers that control breathing may be shutting down from severe toxin buildup.

—

Workup

·Serum ammonia level
·Comprehensive metabolic panel (CMP) including sodium, potassium, creatinine, glucose, and liver enzymes (ALT, AST, alkaline phosphatase, bilirubin)
·Complete blood count (CBC)
·Blood culture and urinalysis with culture
·Abdominal ultrasound with Doppler or CT abdomen/pelvis
·Upper endoscopy (EGD) if there is evidence of GI bleeding
·Electroencephalogram (EEG) in unclear cases

—

Treatment

·Identify and treat the trigger — bleeding, infection, dehydration, low potassium, constipation, sedating drugs, or high protein load
·Lactulose by mouth (15–30 mL every 1–2 hours initially, then adjust) or rectal enema to achieve 2–3 soft bowel movements per day
·Rifaximin 550 mg by mouth twice daily (added to lactulose for moderate to severe or recurrent encephalopathy)
·Correct electrolytes — replace potassium (goal > 4.0 mEq/L) and restore normal hydration with IV fluids if needed
·Stop or reverse any bleeding — transfuse blood if hemoglobin < 7 g/dL, perform urgent upper endoscopy for varices, and give octreotide and ceftriaxone if variceal bleeding is suspected
·Avoid sedating medications (benzodiazepines, opioids, anticholinergics); switch dietary protein to plant-based sources and maintain at least 1.2 g/kg/day unless absolutely contraindicated
·Treat infections aggressively — start empiric antibiotics for suspected spontaneous bacterial peritonitis (SBP) or other infections while awaiting cultures

—

NCLEX trap

·Never give benzodiazepines, sleeping pills, or sedatives. The liver can't break them down, so they pile up and make the brain fog worse. Even a small dose can tip a confused patient into a coma. Keep them safe with side rails and a sitter instead.
·Do not stop protein completely. The body needs protein to heal. Instead, switch to plant protein (beans, tofu, nuts) and cut back on meat and dairy. Plant protein makes less ammonia in the gut. Aim for about 1 to 1.5 grams of protein per kilogram of body weight each day, unless a dietitian says otherwise.
·Do not treat confusion as a separate problem. The confusion is the ammonia poisoning the brain. Find what triggered it—bleeding in the gut, infection, dehydration, low potassium, constipation, or too much protein at once—and fix that. Then lower ammonia with lactulose (a sugar syrup that traps ammonia in the gut) and rifaximin (an antibiotic that kills ammonia-making gut bacteria).
·Start lactulose right away if you see the signs: confusion, sleepiness, flapping tremor (asterixis), or the patient acting strange. Do not wait for the lab. In acute (sudden) liver failure, the brain can swell fast and push down through the skull—that's called herniation and it kills. Time matters.
·Hepatic encephalopathy is a clinical diagnosis—you diagnose it by what you see and hear at the bedside, not just the number. Some people walk around with high ammonia and no symptoms. That is not hepatic encephalopathy yet. You need both: high ammonia AND changes in thinking, mood, or movement.
·You must treat it directly. Find and fix the trigger (bleeding, infection, dehydration, low potassium, constipation, or too much dietary protein). Then give lactulose to make the gut move and trap ammonia in stool, and give rifaximin to kill the gut bacteria that make ammonia. The liver disease is the root, but hepatic encephalopathy needs its own plan to pull ammonia out of the blood and brain.

—

Install Maldek by Hill as an app — studies work even offline