{ "schemaVersion": 2, "eyebrow": "Hepatology", "title": "Acute Liver Failure", "summary": "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.", "seoDescription": "Point-of-care approach to adult acute liver failure: recognition, etiologic triage, critical care priorities, prognostication, and transplant escalation.", "clinicalQuestion": "How should clinicians stabilize, identify the cause of, prognosticate, and escalate care for acute liver failure?", "specialty": "Hepatology and Critical Care", "audience": "U.S. physicians and medical trainees", "tags": [ "acute liver failure", "fulminant hepatic failure", "acetaminophen toxicity", "N-acetylcysteine", "hepatic encephalopathy", "liver transplantation" ], "keyTakeaways": [ "Acute liver failure is acute hepatic dysfunction without established cirrhosis accompanied by hepatic encephalopathy and INR greater than 1.5; prompt hepatology involvement and early transplant-center discussion are required. [19][21]", "Treat acetaminophen-related acute liver failure with N-acetylcysteine; N-acetylcysteine also has benefit in non-acetaminophen acute liver failure, particularly with grade 1-2 encephalopathy. [21]", "Encephalopathy in acute severe autoimmune hepatitis denotes autoimmune hepatitis-related acute liver failure and should trigger urgent liver-transplant consideration. [3]", "King's College Criteria have high specificity but limited sensitivity; failure to meet criteria must not delay transplant-center escalation in a deteriorating patient. [19][20]", "A rapidly rising ammonia concentration, especially above 200 micromol/L, should prompt consideration of continuous renal replacement therapy in liver failure with renal failure, fluid overload, worsening encephalopathy, or refractory hyponatremia. [22]" ], "sections": [ { "id": "recognition-and-transfer", "eyebrow": "Immediate escalation", "heading": "Recognize acute liver failure and transfer before deterioration", "intro": "Establish the syndrome, identify acute-on-chronic disease, and activate transplant-capable critical care early.", "paragraphs": [ "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. [19][21]", "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. [3]", "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. [21]" ], "bullets": [ "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. [19][21]", "Urgently evaluate for transplantation when encephalopathy accompanies acute severe autoimmune hepatitis; autoimmune hepatitis-related acute liver failure is specifically defined by this combination. [3]", "Consider acute Wilson disease and hepatic-vein thrombosis as transplant-relevant etiologies when clinical testing identifies them. [21]" ], "subsections": [], "table": { "caption": "Syndromic distinctions that change urgency and transplant escalation. [3][19][21]", "columns": [ "Clinical pattern", "Operational interpretation", "Immediate action" ], "rows": [ [ "Acute hepatic dysfunction, encephalopathy, INR >1.5, no known cirrhosis", "Acute liver failure. [19][21]", "Involve hepatology and discuss urgently with a liver transplant center. [19]" ], [ "Acute severe autoimmune hepatitis plus encephalopathy", "Autoimmune hepatitis-related acute liver failure. [3]", "Urgent transplant consideration. [3]" ], [ "Acute injury in known or previously unrecognized cirrhosis with organ failure", "Evaluate as acute-on-chronic liver failure rather than routine decompensation. [3]", "Assess for expedited transplantation. [3]" ] ] } }, { "id": "etiologic-triage", "eyebrow": "First diagnostic branch", "heading": "Prioritize etiologies that alter immediate treatment or transplant probability", "intro": "Obtain a parallel exposure, vascular, viral, and autoimmune assessment while critical care proceeds.", "paragraphs": [ "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. [20][19]", "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. [5]", "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. [21][10]", "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. [3]" ], "bullets": [ "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. [21]", "Consider Wilson disease in an acute liver-failure phenotype because identifiable Wilson disease should prompt liver-transplant consideration. [21]", "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. [3]" ], "subsections": [ { "heading": "Etiology and trajectory", "paragraphs": [ "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. [3]" ], "bullets": [] } ], "table": { "caption": "Etiologic branches with management consequences. [3][5][10][21]", "columns": [ "Branch", "Discriminator", "Action changed by result" ], "rows": [ [ "Acetaminophen toxicity", "Exposure history; compatible hyperacute liver-failure presentation. [21]", "Administer N-acetylcysteine and assess continuously for recovery versus transplantation. [21]" ], [ "Drug-induced liver injury", "Recent prescribed, nonprescription, herbal, or supplement exposure with exclusion of competing causes. [5]", "Stop the suspected agent and continue transplant-directed evaluation if liver failure progresses. [5][19]" ], [ "Hepatitis E", "HEV immunoglobulin M positivity. [10]", "Classify as acute viral hepatitis-associated liver failure and continue transplant-center management. [10][19]" ], [ "Autoimmune hepatitis", "Acute severe autoimmune hepatitis; encephalopathy identifies autoimmune hepatitis-related acute liver failure. [3]", "Consider corticosteroids in flare-associated acute-on-chronic liver failure; expedite transplant evaluation when encephalopathy is present. [3]" ], [ "Wilson disease or hepatic-vein thrombosis", "Etiology established by disease-specific evaluation or vascular imaging. [21]", "Consider liver transplantation. [21]" ] ] } }, { "id": "critical-care-management", "eyebrow": "ICU priorities", "heading": "Manage cerebral, renal, and systemic complications in parallel", "intro": "Escalate organ support according to neurologic and metabolic trajectory rather than liver tests alone.", "paragraphs": [ "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. [21][22]", "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. [22]", "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. [8][22]" ], "bullets": [ "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. [19][21]", "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. [3]", "Use multidisciplinary transplant-center care for patients with progressive encephalopathy, renal failure, or other extrahepatic organ failure. [3][19]" ], "subsections": [], "table": { "caption": "Complication-driven escalation in acute liver failure. [3][19][21][22]", "columns": [ "Finding", "Interpretation", "Escalation" ], "rows": [ [ "Hepatic encephalopathy with INR >1.5", "Meets acute liver-failure criteria in a patient without prior cirrhosis. [19][21]", "Urgent hepatology review and liver-transplant center discussion. [19]" ], [ "Rapidly rising ammonia or ammonia >200 micromol/L", "Associated with poor outcomes. [22]", "Consider continuous renal replacement therapy, particularly with renal failure, fluid overload, worsening encephalopathy, or refractory hyponatremia. [22]" ], [ "Acute-on-chronic liver failure with extrahepatic organ failure", "A distinct high-risk state from decompensated cirrhosis. [3]", "Consider expedited liver transplantation. [3]" ] ] } }, { "id": "n-acetylcysteine", "eyebrow": "Disease-modifying therapy", "heading": "Use N-acetylcysteine early while etiology and prognosis are clarified", "intro": "N-acetylcysteine should not be restricted to a confirmed acetaminophen concentration when acute liver failure is evolving.", "paragraphs": [ "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. [21]", "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. [19][21]", "Ischemic hepatitis is the stated exception to the recommendation for N-acetylcysteine across acute liver failure etiologies. [21]" ], "bullets": [ "Start N-acetylcysteine for suspected or confirmed acetaminophen-related acute liver failure. [21]", "Consider N-acetylcysteine in non-acetaminophen acute liver failure, with greatest described benefit in grade 1-2 encephalopathy. [21]", "Continue serial neurologic, coagulation, renal, and ammonia monitoring after treatment initiation because treatment response does not eliminate transplant risk. [19][21][22]" ], "subsections": [], "table": { "caption": "N-acetylcysteine treatment selection in acute liver failure. [21]", "columns": [ "Etiology or presentation", "N-acetylcysteine role", "Concurrent action" ], "rows": [ [ "Acetaminophen-associated acute liver failure", "Indicated. [21]", "Proceed with intensive monitoring and transplant-center assessment. [19][21]" ], [ "Non-acetaminophen acute liver failure with grade 1-2 encephalopathy", "Demonstrated therapeutic benefit. [21]", "Continue etiologic evaluation and prognosis-directed transplant planning. [19][21]" ], [ "Ischemic hepatitis", "Exception to the recommendation for N-acetylcysteine in acute liver failure. [21]", "Treat the underlying ischemic process and reassess for alternate causes if the course is atypical. [21]" ] ] } }, { "id": "prognosis-and-transplant", "eyebrow": "Listing decisions", "heading": "Use prognostic tools to support—not delay—transplant decisions", "intro": "Prognostication must incorporate etiology, dynamic organ failure, and transplant-center assessment.", "paragraphs": [ "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. [19][20]", "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. [20]", "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. [19]" ], "bullets": [ "Escalate transplant evaluation for acute liver failure associated with Wilson disease or hepatic-vein thrombosis. [21]", "Treat acute severe autoimmune hepatitis with encephalopathy as a transplant emergency rather than relying on corticosteroid response alone. [3]", "Use repeat clinical assessment after admission because prognostic accuracy depends on evolving physiology, not only initial presentation. [19][24]" ], "subsections": [], "table": { "caption": "How to apply prognostic information without false reassurance. [3][19][20][21]", "columns": [ "Prognostic input", "What it supports", "What it must not do" ], "rows": [ [ "King's College Criteria met", "Identifies high risk of failed spontaneous recovery because specificity is high. [19][20]", "Do not substitute the score for transplant-center clinical assessment. [19]" ], [ "King's College Criteria not met", "Does not exclude poor outcome because sensitivity is about 58%. [19][20]", "Do not delay transfer or listing discussion in a clinically deteriorating patient. [19]" ], [ "Acetaminophen etiology", "Suggests a higher likelihood of spontaneous recovery, approximately 75%. [19]", "Do not relax surveillance for cerebral edema, renal failure, or worsening encephalopathy. [21][22]" ], [ "Autoimmune hepatitis-related acute liver failure", "Reported transplant-free survival is lower than acute or acute severe autoimmune hepatitis without liver failure. [3]", "Do not postpone urgent transplant consideration. [3]" ] ] } } ], "faq": [ { "question": "Does a patient need hepatic encephalopathy to meet criteria for acute liver failure?", "answer": "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. [19][21][22]" }, { "question": "Can failure to meet King's College Criteria rule out the need for transplantation?", "answer": "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. 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European Association for the Study of the Liver EASL Clinical Practice Guidelines: Management of Hepatocellular Carcinoma. J. Hepatol. 69, 182–236. 2018.\n76. Li, Y. C. et al. Low glucose metabolism in hepatocellular carcinoma with GPC3 ", "score": 0.16775002 }, { "number": 10, "title": "FIGO guideline on liver disease and pregnancy - Nana - 2025", "detail": "obgyn.onlinelibrary.wiley.com", "url": "https://obgyn.onlinelibrary.wiley.com/doi/10.1002/ijgo.70161?af=R", "authors": "obgyn.onlinelibrary.wiley.com", "host": "obgyn.onlinelibrary.wiley.com", "snippet": "Diagnosis can be made using serologic testing for HEV immunoglobulin M antibodies. Acute liver failure following acute infection is more", "score": 0.52685463 }, { "number": 11, "title": "Characterization of acute liver failure and development of a continuous risk of death staging system in children - ScienceDirect", "detail": "www.sciencedirect.com", "url": "https://www.sciencedirect.com/science/article/abs/pii/S0168827805004514", "authors": "www.sciencedirect.com", "host": "www.sciencedirect.com", "snippet": "Title: Characterization of acute liver failure and development of a continuous risk of death staging system in children - ScienceDirect\nAcute liver failure (ALF) in children has been associated with an overall mortality of approximately 70% in the pretransplant era and 50–80% survival in those under", "score": 0.71137124 }, { "number": 12, "title": "Fulminant hepatic failure - ScienceDirect", "detail": "www.sciencedirect.com", "url": "https://www.sciencedirect.com/science/article/pii/S0022347687804468", "authors": "www.sciencedirect.com", "host": "www.sciencedirect.com", "snippet": "Title: Fulminant hepatic failure - ScienceDirect\n## Article preview. # Fulminant hepatic failure. ## First page preview. Click to open first page preview. ### Metabolic inhibition of polymorphonuclear leukocytes in fulminant hepatic failure. ### Systemic candidiasis complicating acute hepatic failur", "score": 0.685971 }, { "number": 13, "title": "King's College Hospital Criteria for Non-Acetaminophen Induced Acute Liver Failure in an International Cohort of Children - ScienceDirect", "detail": "www.sciencedirect.com", "url": "https://www.sciencedirect.com/science/article/abs/pii/S0022347612007573", "authors": "www.sciencedirect.com", "host": "www.sciencedirect.com", "snippet": "Title: King's College Hospital Criteria for Non-Acetaminophen Induced Acute Liver Failure in an International Cohort of Children - ScienceDirect\n# Original Article King's College Hospital Criteria for Non-Acetaminophen Induced Acute Liver Failure in an International Cohort of Children. To validate K", "score": 0.6760432 }, { "number": 14, "title": "Fulminant Hepatic Failure - an overview | ScienceDirect Topics", "detail": "www.sciencedirect.com", "url": "https://www.sciencedirect.com/topics/medicine-and-dentistry/fulminant-hepatic-failure", "authors": "www.sciencedirect.com", "host": "www.sciencedirect.com", "snippet": "Fulminant hepatic failure (FHF) is the rapid development of encephalopathy, coagulopathy, and jaundice in someone without known preexisting liver disease. Acetaminophen toxicity accounts for approximately half of all causes of FHF in the United States.38 Patients can rapidly progress to a state of c", "score": 0.6493346 }, { "number": 15, "title": "Prognostic Modeling in Pediatric Acute Liver Failure", "detail": "journals.lww.com", "url": "https://journals.lww.com/lt/_layouts/15/oaks.journals/downloadpdf.aspx?an=01445473-201610000-00015", "authors": "journals.lww.com", "host": "journals.lww.com", "snippet": "by V Jain · 2016 · Cited by 102 — Liver transplantation (LT) is the only proven treatment for pediatric acute liver failure (PALF). INR, 1.5-1.9) with HE.( acetaminophen-induced acute liver", "score": 0.5835125 }, { "number": 16, "title": "Clinical Update - Acute liver failure", "detail": "journals.lww.com", "url": "https://journals.lww.com/JPCR/_layouts/15/oaks.journals/downloadpdf.aspx?an=01961613-201906050-00010", "authors": "journals.lww.com", "host": "journals.lww.com", "snippet": "Acute liver failure is a syndrome characterised by massive liver necrosis (coagulation disorder PT>15sec or INR>1.5 not corrected by vitamin K)", "score": 0.45696765 }, { "number": 17, "title": "Intensive Care Management of Pediatric Acute Liver Failure", "detail": "journals.lww.com", "url": "https://journals.lww.com/jpgn/_layouts/15/oaks.journals/downloadpdf.aspx?an=00005176-201705000-00004", "authors": "journals.lww.com", "host": "journals.lww.com", "snippet": "by R Lutfi · 2017 · Cited by 90 — Acetaminophen overdose was the most common cause of drug-induced ALF, accounting for more than three quarters of drug-induced cases. INR 1⁄4 international", "score": 0.4272061 }, { "number": 18, "title": "Poster Abstracts : Hepatology", "detail": "journals.lww.com", "url": "https://journals.lww.com/hep/fulltext/10.1002/hep.32188~poster-abstracts", "authors": "journals.lww.com", "host": "journals.lww.com", "snippet": "Background: In severe cases of acetaminophen (APAP) overdose, acute liver injury rapidly progresses to acute liver failure (ALF), producing life‐threatening", "score": 0.3995779 }, { "number": 19, "title": "Acute Liver Failure - StatPearls - NCBI Bookshelf - NIH", "detail": "www.ncbi.nlm.nih.gov", "url": "https://www.ncbi.nlm.nih.gov/books/NBK482374", "authors": "www.ncbi.nlm.nih.gov", "host": "www.ncbi.nlm.nih.gov", "snippet": "The specific etiology of acute liver failure is also an essential predictor for spontaneous recovery. Approximately 75% of patients spontaneously recover from acetaminophen (paracetamol) induced failure, but only about 40% spontaneously recover from other causes.(#article-24369.r11) King's College c", "score": 0.67706895 }, { "number": 20, "title": "Systematic review: prognostic tests of paracetamol-induced acute liver failure - Database of Abstracts of Reviews of Effects (DARE): Quality-assessed Reviews - NCBI Bookshelf", "detail": "www.ncbi.nlm.nih.gov", "url": "https://www.ncbi.nlm.nih.gov/books/NBK79544", "authors": "www.ncbi.nlm.nih.gov", "host": "www.ncbi.nlm.nih.gov", "snippet": "## Abstract\n\nBACKGROUND: Paracetamol (acetaminophen) toxicity remains the leading cause of acute liver failure (ALF) in the developed world. In the UK, the recently modified King's College Criteria are used to list patients for emergency liver transplantation, but these criteria have been criticized", "score": 0.62934244 }, { "number": 21, "title": "Acute Liver Failure - StatPearls - NCBI Bookshelf", "detail": "www.ncbi.nlm.nih.gov", "url": "https://www.ncbi.nlm.nih.gov/sites/books/NBK482374", "authors": "www.ncbi.nlm.nih.gov", "host": "www.ncbi.nlm.nih.gov", "snippet": "Acute liver failure (ALF) represents a rare but life-threatening clinical syndrome characterized by rapid deterioration of liver function in patients without prior liver disease or cirrhosis. Some conditions are also among the differential diagnoses that may cause ALF despite not strictly meeting th", "score": 0.6055431 }, { "number": 22, "title": "Pediatric Acute Liver Failure: from Prompt Recognition and ...", "detail": "www.aasld.org", "url": "https://www.aasld.org/liver-fellow-network/core-series/clinical-pearls/pediatric-acute-liver-failure-prompt-recognition", "authors": "www.aasld.org", "host": "www.aasld.org", "snippet": "The fragile clinical state and associated high mortality of PALF within the first week are the basis for listing a patient asstatus 1A%20liver%20failure%20and%20are%20not%20likely%20to%20live%20more%20than%20a%20few%20days%20without%20a%20transplant)for liver transplant. The patient in the question ", "score": 0.40457857 }, { "number": 23, "title": "PowerPoint Presentation", "detail": "easl.eu", "url": "https://easl.eu/wp-content/uploads/2017/10/Acute-liver-failure_EASL-CPG-Slide-Deck.pptx", "authors": "easl.eu", "host": "easl.eu", "snippet": "These slides give a comprehensive overview of the EASL clinical practice guidelines on the management of acute (fulminant) liver failure", "score": 0.3430341 }, { "number": 24, "title": "Study Details | NCT00518440 | A Multi-Center Trial to Study Acute Liver Failure in Adults | ClinicalTrials.gov", "detail": "clinicaltrials.gov", "url": "https://clinicaltrials.gov/study/NCT00518440", "authors": "clinicaltrials.gov", "host": "clinicaltrials.gov", "snippet": "Basta G, Del Turco S, Navarra T, Lee WM; Acute Liver Failure Study Group. Circulating levels of soluble receptor for advanced glycation end products and ligands of the receptor for advanced glycation end products in patients with acute liver failure. Liver Transpl. 2015 Jun;21(6):847-54. doi: 10.100", "score": 0.71185225 } ], "publishedAt": "2026-08-24T16:39:09.120556+00:00", "updatedAt": "2026-08-24T16:39:09.120556+00:00", "readingMinutes": 5, "slug": "acute-liver-failure" }