Hepatology
Acute Liver Failure
Acute liver failure requires immediate recognition of encephalopathy with INR greater than 1.5, etiologic triage, intensive monitoring for cerebral edema and multiorgan failure, early N-acetylcysteine when appropriate, and urgent coordination with a liver transplant center.
Immediate escalation
Recognize acute liver failure and transfer before deterioration
Establish the syndrome, identify acute-on-chronic disease, and activate transplant-capable critical care early.
In an adult without known cirrhosis, acute hepatic injury plus hepatic encephalopathy and INR greater than 1.5 defines acute liver failure and warrants immediate hepatology assessment. Contact a liver transplant center early to determine transfer candidacy rather than waiting for a prognostic score or a complete etiologic evaluation. PubMed+1PubMedAcute Liver Failure - StatPearls - NCBI Bookshelf - NIHPubMedAcute Liver Failure - StatPearls - NCBI Bookshelf
Do not classify patients with established cirrhosis and acute deterioration as uncomplicated acute liver failure. Acute-on-chronic liver failure and decompensated cirrhosis require distinction because acute-on-chronic liver failure identifies patients who may merit expedited transplantation. BMJBMJBritish Society of Gastroenterology guidelines for diagnosis ...
Treat encephalopathy as a trajectory marker. Hyperacute presentations, commonly associated with acetaminophen toxicity, hepatitis A or E, and ischemic liver injury, carry greater cerebral-edema risk but can have a better transplant-free prognosis than more indolent etiologies. PubMedPubMedAcute Liver Failure - StatPearls - NCBI Bookshelf
Admit patients with acute liver failure to an ICU capable of frequent neurologic, renal, hemodynamic, and metabolic reassessment; arrange transfer if transplant-center care is not immediately available. PubMed+1PubMedAcute Liver Failure - StatPearls - NCBI Bookshelf - NIHPubMedAcute Liver Failure - StatPearls - NCBI Bookshelf
Urgently evaluate for transplantation when encephalopathy accompanies acute severe autoimmune hepatitis; autoimmune hepatitis-related acute liver failure is specifically defined by this combination. BMJBMJBritish Society of Gastroenterology guidelines for diagnosis ...
Consider acute Wilson disease and hepatic-vein thrombosis as transplant-relevant etiologies when clinical testing identifies them. PubMedPubMedAcute Liver Failure - StatPearls - NCBI Bookshelf
First diagnostic branch
Prioritize etiologies that alter immediate treatment or transplant probability
Obtain a parallel exposure, vascular, viral, and autoimmune assessment while critical care proceeds.
First determine whether acetaminophen exposure is plausible, including unintentional repeated supratherapeutic ingestion. Acetaminophen toxicity is the leading cause of acute liver failure in developed settings and has a substantially higher spontaneous-recovery rate than other etiologies, approximately 75% versus about 40%, making exposure identification central to counseling and transplant planning. PubMed+1PubMedSystematic review: prognostic tests of paracetamol-induced acute liver failure - Database of Abstracts of Reviews of Effects (DARE): Quality-assessed Reviews - NCBI BookshelfPubMedAcute Liver Failure - StatPearls - NCBI Bookshelf - NIH
Review all prescription drugs, over-the-counter products, herbal agents, supplements, and recent medication changes for drug-induced liver injury. Although drug-induced liver injury accounts for less than 1% of acute liver injury cases seen by gastroenterologists, it is the most common cause of acute liver failure in that setting. BMJBMJDrug-induced liver injury: recent advances in diagnosis ...
Test for acute hepatotropic viral infection based on epidemiologic risk and presentation. Hepatitis A and E are recognized hyperacute causes; hepatitis E diagnosis can be made with HEV immunoglobulin M serology. PubMed+1PubMedAcute Liver Failure - StatPearls - NCBI BookshelfWileyFIGO guideline on liver disease and pregnancy - Nana - 2025
When the presentation is compatible with autoimmune hepatitis, assess urgently because corticosteroids may benefit acute-on-chronic liver failure precipitated by autoimmune hepatitis flare, whereas encephalopathy changes the category to autoimmune hepatitis-related acute liver failure and should accelerate transplant evaluation. BMJBMJBritish Society of Gastroenterology guidelines for diagnosis ...
Use Doppler-based vascular evaluation when hepatic-vein thrombosis is suspected; identified hepatic-vein thrombosis is a cause for transplant consideration in acute liver failure. PubMedPubMedAcute Liver Failure - StatPearls - NCBI Bookshelf
Consider Wilson disease in an acute liver-failure phenotype because identifiable Wilson disease should prompt liver-transplant consideration. PubMedPubMedAcute Liver Failure - StatPearls - NCBI Bookshelf
Interpret a very high aminotransferase presentation in context: in autoimmune hepatitis, pretreatment AST greater than 10 times the upper limit of normal is associated with less cirrhosis, decompensation, liver-related death, or transplantation than lower AST values. BMJBMJBritish Society of Gastroenterology guidelines for diagnosis ...
| Branch | Discriminator | Action changed by result |
|---|---|---|
| Acetaminophen toxicity | Exposure history; compatible hyperacute liver-failure presentation. PubMedPubMedAcute Liver Failure - StatPearls - NCBI Bookshelf | Administer N-acetylcysteine and assess continuously for recovery versus transplantation. PubMedPubMedAcute Liver Failure - StatPearls - NCBI Bookshelf |
| Drug-induced liver injury | Recent prescribed, nonprescription, herbal, or supplement exposure with exclusion of competing causes. BMJBMJDrug-induced liver injury: recent advances in diagnosis ... | Stop the suspected agent and continue transplant-directed evaluation if liver failure progresses. BMJ+1BMJDrug-induced liver injury: recent advances in diagnosis ...PubMedAcute Liver Failure - StatPearls - NCBI Bookshelf - NIH |
| Hepatitis E | HEV immunoglobulin M positivity. WileyWileyFIGO guideline on liver disease and pregnancy - Nana - 2025 | Classify as acute viral hepatitis-associated liver failure and continue transplant-center management. Wiley+1WileyFIGO guideline on liver disease and pregnancy - Nana - 2025PubMedAcute Liver Failure - StatPearls - NCBI Bookshelf - NIH |
| Autoimmune hepatitis | Acute severe autoimmune hepatitis; encephalopathy identifies autoimmune hepatitis-related acute liver failure. BMJBMJBritish Society of Gastroenterology guidelines for diagnosis ... | Consider corticosteroids in flare-associated acute-on-chronic liver failure; expedite transplant evaluation when encephalopathy is present. BMJBMJBritish Society of Gastroenterology guidelines for diagnosis ... |
| Wilson disease or hepatic-vein thrombosis | Etiology established by disease-specific evaluation or vascular imaging. PubMedPubMedAcute Liver Failure - StatPearls - NCBI Bookshelf | Consider liver transplantation. PubMedPubMedAcute Liver Failure - StatPearls - NCBI Bookshelf |
Etiology and trajectory
Etiology does not replace serial clinical assessment. Acute severe autoimmune hepatitis has reported transplant-free survival above 90% in acute autoimmune hepatitis with jaundice, 66% in acute severe autoimmune hepatitis, and 32% when acute liver failure is present; cirrhosis or decompensation at presentation is an adverse prognostic feature. BMJBMJBritish Society of Gastroenterology guidelines for diagnosis ...
ICU priorities
Manage cerebral, renal, and systemic complications in parallel
Escalate organ support according to neurologic and metabolic trajectory rather than liver tests alone.
Monitor neurologic status closely because cerebral edema risk is greatest in hyperacute acute liver failure. Worsening encephalopathy should trigger reassessment of airway protection, transfer status, renal support needs, and transplant urgency. PubMed+1PubMedAcute Liver Failure - StatPearls - NCBI BookshelfaasldPediatric Acute Liver Failure: from Prompt Recognition and ...
Follow ammonia trends rather than relying on a single measurement. Although no established ammonia threshold mandates renal replacement therapy, ammonia above 200 micromol/L is associated with poor outcomes; a rapidly rising concentration should prompt consideration of continuous renal replacement therapy, especially with renal failure, fluid overload, worsening encephalopathy, hepatorenal syndrome, or refractory hyponatremia. aasldaasldPediatric Acute Liver Failure: from Prompt Recognition and ...
Assess renal dysfunction as a transplant-relevant complication. Acute kidney injury in cirrhosis has implications for liver transplantation, and renal-replacement decisions should incorporate fluid status, neurologic progression, ammonia trajectory, and metabolic control rather than creatinine alone. Nature+1NatureOptimizing the liver transplant candidate | npj Gut and LiveraasldPediatric Acute Liver Failure: from Prompt Recognition and ...
Use serial INR and encephalopathy assessment to follow synthetic failure and neurologic progression; do not interpret isolated aminotransferase improvement as proof of recovery. The acute liver failure syndrome is defined by coagulopathy and encephalopathy, not aminotransferase elevation alone. PubMed+1PubMedAcute Liver Failure - StatPearls - NCBI Bookshelf - NIHPubMedAcute Liver Failure - StatPearls - NCBI Bookshelf
For acute severe autoimmune hepatitis with acute-on-chronic liver failure, differentiate this state from ordinary decompensated cirrhosis because it may justify expedited transplantation and can respond to corticosteroids. BMJBMJBritish Society of Gastroenterology guidelines for diagnosis ...
Use multidisciplinary transplant-center care for patients with progressive encephalopathy, renal failure, or other extrahepatic organ failure. BMJ+1BMJBritish Society of Gastroenterology guidelines for diagnosis ...PubMedAcute Liver Failure - StatPearls - NCBI Bookshelf - NIH
Disease-modifying therapy
Use N-acetylcysteine early while etiology and prognosis are clarified
N-acetylcysteine should not be restricted to a confirmed acetaminophen concentration when acute liver failure is evolving.
Administer N-acetylcysteine for acetaminophen-associated acute liver failure. In acute liver failure not caused by acetaminophen, N-acetylcysteine also demonstrates benefit, particularly in patients with early encephalopathy grades 1-2. PubMedPubMedAcute Liver Failure - StatPearls - NCBI Bookshelf
Do not defer transplant-center consultation because N-acetylcysteine has been initiated. The intervention supports potential recovery, but etiology and worsening organ dysfunction determine whether the patient requires urgent transplantation. PubMed+1PubMedAcute Liver Failure - StatPearls - NCBI Bookshelf - NIHPubMedAcute Liver Failure - StatPearls - NCBI Bookshelf
Ischemic hepatitis is the stated exception to the recommendation for N-acetylcysteine across acute liver failure etiologies. PubMedPubMedAcute Liver Failure - StatPearls - NCBI Bookshelf
Start N-acetylcysteine for suspected or confirmed acetaminophen-related acute liver failure. PubMedPubMedAcute Liver Failure - StatPearls - NCBI Bookshelf
Consider N-acetylcysteine in non-acetaminophen acute liver failure, with greatest described benefit in grade 1-2 encephalopathy. PubMedPubMedAcute Liver Failure - StatPearls - NCBI Bookshelf
Continue serial neurologic, coagulation, renal, and ammonia monitoring after treatment initiation because treatment response does not eliminate transplant risk. PubMed+2PubMedAcute Liver Failure - StatPearls - NCBI Bookshelf - NIHPubMedAcute Liver Failure - StatPearls - NCBI BookshelfaasldPediatric Acute Liver Failure: from Prompt Recognition and ...
| Etiology or presentation | N-acetylcysteine role | Concurrent action |
|---|---|---|
| Acetaminophen-associated acute liver failure | Indicated. PubMedPubMedAcute Liver Failure - StatPearls - NCBI Bookshelf | Proceed with intensive monitoring and transplant-center assessment. PubMed+1PubMedAcute Liver Failure - StatPearls - NCBI Bookshelf - NIHPubMedAcute Liver Failure - StatPearls - NCBI Bookshelf |
| Non-acetaminophen acute liver failure with grade 1-2 encephalopathy | Demonstrated therapeutic benefit. PubMedPubMedAcute Liver Failure - StatPearls - NCBI Bookshelf | Continue etiologic evaluation and prognosis-directed transplant planning. PubMed+1PubMedAcute Liver Failure - StatPearls - NCBI Bookshelf - NIHPubMedAcute Liver Failure - StatPearls - NCBI Bookshelf |
| Ischemic hepatitis | Exception to the recommendation for N-acetylcysteine in acute liver failure. PubMedPubMedAcute Liver Failure - StatPearls - NCBI Bookshelf | Treat the underlying ischemic process and reassess for alternate causes if the course is atypical. PubMedPubMedAcute Liver Failure - StatPearls - NCBI Bookshelf |
Listing decisions
Use prognostic tools to support—not delay—transplant decisions
Prognostication must incorporate etiology, dynamic organ failure, and transplant-center assessment.
King's College Criteria can identify patients unlikely to recover spontaneously, but their performance favors specificity over sensitivity. Reported specificity ranges from 98% to 100%, while sensitivity is approximately 58%; therefore, a patient who does not meet criteria may still require urgent transplantation. PubMed+1PubMedAcute Liver Failure - StatPearls - NCBI Bookshelf - NIHPubMedSystematic review: prognostic tests of paracetamol-induced acute liver failure - Database of Abstracts of Reviews of Effects (DARE): Quality-assessed Reviews - NCBI Bookshelf
In acetaminophen-induced acute liver failure, a systematic review reported pooled sensitivity of 58.2% and specificity of 94.6% for the original King's College Criteria. Addition of arterial lactate did not improve the diagnostic odds ratio in the pooled analysis. PubMedPubMedSystematic review: prognostic tests of paracetamol-induced acute liver failure - Database of Abstracts of Reviews of Effects (DARE): Quality-assessed Reviews - NCBI Bookshelf
Etiology materially changes expected spontaneous recovery. Approximately three quarters of acetaminophen-induced acute liver failure cases recover spontaneously, compared with approximately 40% for other causes; this distinction informs counseling but should not supersede current encephalopathy, renal dysfunction, or multiorgan-failure trajectory. PubMedPubMedAcute Liver Failure - StatPearls - NCBI Bookshelf - NIH
Escalate transplant evaluation for acute liver failure associated with Wilson disease or hepatic-vein thrombosis. PubMedPubMedAcute Liver Failure - StatPearls - NCBI Bookshelf
Treat acute severe autoimmune hepatitis with encephalopathy as a transplant emergency rather than relying on corticosteroid response alone. BMJBMJBritish Society of Gastroenterology guidelines for diagnosis ...
Use repeat clinical assessment after admission because prognostic accuracy depends on evolving physiology, not only initial presentation. PubMed+1PubMedAcute Liver Failure - StatPearls - NCBI Bookshelf - NIHclinicaltrialsStudy Details | NCT00518440 | A Multi-Center Trial to Study Acute Liver Failure in Adults | ClinicalTrials.gov
Common questions
Does a patient need hepatic encephalopathy to meet criteria for acute liver failure?
In adults, acute liver failure requires hepatic encephalopathy plus coagulopathy with INR greater than 1.5 in the absence of prior cirrhosis. Pediatric acute liver failure differs because encephalopathy is not required for diagnosis. PubMed+2PubMedAcute Liver Failure - StatPearls - NCBI Bookshelf - NIHPubMedAcute Liver Failure - StatPearls - NCBI BookshelfaasldPediatric Acute Liver Failure: from Prompt Recognition and ...
Can failure to meet King's College Criteria rule out the need for transplantation?
No. King's College Criteria are highly specific but have limited sensitivity of about 58%; ongoing encephalopathy, organ failure, and etiologic risk still warrant early transplant-center management. PubMed+1PubMedAcute Liver Failure - StatPearls - NCBI Bookshelf - NIHPubMedSystematic review: prognostic tests of paracetamol-induced acute liver failure - Database of Abstracts of Reviews of Effects (DARE): Quality-assessed Reviews - NCBI Bookshelf
References
- Ighovwerha (Igho) Ofotokun, MD, MSc, FIDSA CV — www.fda.gov · www.fda.gov
- Curriculum Vitae: Igho Ofotokun — www.fda.gov · www.fda.gov
- British Society of Gastroenterology guidelines for diagnosis ... — gut.bmj.com · gut.bmj.com
- A9.3.full.pdf — gut.bmj.com · gut.bmj.com
- Drug-induced liver injury: recent advances in diagnosis ... — gut.bmj.com · gut.bmj.com
- Liver diseases: epidemiology, causes, trends and predictions — www.nature.com · www.nature.com
- Pathophysiology, noninvasive diagnostics and emerging personalized treatments for metabolic associated liver diseases | npj Gut and Liver — www.nature.com · www.nature.com
- Optimizing the liver transplant candidate | npj Gut and Liver — www.nature.com · www.nature.com
- Clinical applications of fibroblast activation protein inhibitor positron emission tomography (FAPI-PET) | npj Imaging — www.nature.com · www.nature.com
- FIGO guideline on liver disease and pregnancy - Nana - 2025 — obgyn.onlinelibrary.wiley.com · obgyn.onlinelibrary.wiley.com
- Characterization of acute liver failure and development of a continuous risk of death staging system in children - ScienceDirect — www.sciencedirect.com · www.sciencedirect.com
- Fulminant hepatic failure - ScienceDirect — www.sciencedirect.com · www.sciencedirect.com
- King's College Hospital Criteria for Non-Acetaminophen Induced Acute Liver Failure in an International Cohort of Children - ScienceDirect — www.sciencedirect.com · www.sciencedirect.com
- Fulminant Hepatic Failure - an overview | ScienceDirect Topics — www.sciencedirect.com · www.sciencedirect.com
- Prognostic Modeling in Pediatric Acute Liver Failure — journals.lww.com · journals.lww.com
- Clinical Update - Acute liver failure — journals.lww.com · journals.lww.com
- Intensive Care Management of Pediatric Acute Liver Failure — journals.lww.com · journals.lww.com
- Poster Abstracts : Hepatology — journals.lww.com · journals.lww.com
- Acute Liver Failure - StatPearls - NCBI Bookshelf - NIH — www.ncbi.nlm.nih.gov · www.ncbi.nlm.nih.gov
- Systematic review: prognostic tests of paracetamol-induced acute liver failure - Database of Abstracts of Reviews of Effects (DARE): Quality-assessed Reviews - NCBI Bookshelf — www.ncbi.nlm.nih.gov · www.ncbi.nlm.nih.gov
- Acute Liver Failure - StatPearls - NCBI Bookshelf — www.ncbi.nlm.nih.gov · www.ncbi.nlm.nih.gov
- Pediatric Acute Liver Failure: from Prompt Recognition and ... — www.aasld.org · www.aasld.org
- PowerPoint Presentation — easl.eu · easl.eu
- Study Details | NCT00518440 | A Multi-Center Trial to Study Acute Liver Failure in Adults | ClinicalTrials.gov — clinicaltrials.gov · clinicaltrials.gov