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Hepatology and Critical Care

Acute-on-Chronic Liver Failure

Acute-on-chronic liver failure requires immediate identification of extrahepatic organ failure, reversal of precipitants, ICU-level organ support, and early transplant-center engagement. Serial assessment of organ dysfunction—not liver tests alone—determines prognosis, treatment intensity, and whether transplantation remains feasible.

Clinical question: How should physicians identify, stabilize, prognosticate, and triage patients with acute-on-chronic liver failure for transplantation?

Recognition

Identify ACLF by acute deterioration plus organ failure

Separate ACLF from uncomplicated decompensation at first assessment because organ failure changes disposition and transplant urgency.

Use the AASLD minimum clinical construct: acute onset with rapid deterioration; liver failure manifested by elevated bilirubin and INR in chronic liver disease with or without cirrhosis; and at least one extrahepatic neurologic, circulatory, respiratory, or renal organ failure. Definitions vary across AASLD, EASL-CLIF, APASL, and NACSELD frameworks; document the system used rather than treating the ACLF label as interchangeable across studies. Wolters KluwerAcute-on-chronic liver failure and immune... : Hepatology CommunicationsaasldManagement of Acute on Chronic Liver Failure in the ...

Escalate to ICU or a transplant-capable critical-care setting when organ failure is present or evolving. Under CLIF-OF criteria, shock despite adequate fluid resuscitation is defined by mean arterial pressure below 60 mm Hg or a fall in systolic blood pressure of 40 mm Hg from baseline; respiratory failure includes PaO2/FiO2 200 or lower, SpO2/FiO2 214 or lower, or mechanical-ventilation requirement. BMJAcute-on-chronic liver failure: an update

Do not classify an encephalopathic patient as having hepatic encephalopathy without excluding competing emergencies. Evaluate for intracranial hemorrhage, stroke, decompensated diabetes, psychiatric disease, and alcohol-associated dementia when clinically indicated. Intubate for airway protection with Glasgow Coma Scale score 8 or lower or grade III-IV hepatic encephalopathy. aasldManagement of Acute on Chronic Liver Failure in the ...

Immediate organ-failure findings that should drive critical-care escalation. BMJAcute-on-chronic liver failure: an updateaasldManagement of Acute on Chronic Liver Failure in the ...
SystemHigh-risk findingImmediate action
NeurologicGrade III-IV hepatic encephalopathy or Glasgow Coma Scale score 8 or lower. aasldManagement of Acute on Chronic Liver Failure in the ...Protect airway; evaluate for nonhepatic causes of altered mental status. aasldManagement of Acute on Chronic Liver Failure in the ...
CirculatoryShock despite fluid resuscitation: mean arterial pressure below 60 mm Hg or systolic pressure decrease of 40 mm Hg from baseline. BMJAcute-on-chronic liver failure: an updateInitiate hemodynamic support and identify the precipitant, particularly infection or hemorrhage. ScienceDirectBridging the critically ill patient with acute to chronic liver ...aasldManagement of Acute on Chronic Liver Failure in the ...
RespiratoryPaO2/FiO2 200 or lower, SpO2/FiO2 214 or lower, or need for mechanical ventilation. BMJAcute-on-chronic liver failure: an updateManage as respiratory failure in the ICU and reassess transplant candidacy as organ support evolves. ScienceDirectBridging the critically ill patient with acute to chronic liver ...
RenalRenal organ failure in the setting of ACLF, including suspected hepatorenal syndrome-AKI. BMJGuidelines on the management of ascites in cirrhosis - GutaasldManagement of Acute on Chronic Liver Failure in the ...Assess for reversible causes; use albumin plus vasoconstrictor therapy when HRS-AKI is diagnosed. BMJGuidelines on the management of ascites in cirrhosis - Gut

Diagnostic Branching

Search immediately for reversible precipitants

Treat precipitants in parallel with organ support; waiting for full diagnostic closure risks losing transplant eligibility.

Infection, gastrointestinal hemorrhage, alcohol-associated hepatitis, and hepatic or extrahepatic injury can precipitate ACLF. In one contemporary cohort, bacterial infection occurred in 21.5% of ACLF admissions versus 13.3% of acute decompensation without ACLF; hepatorenal syndrome and hepatic encephalopathy were also more frequent in ACLF. Wolters KluwerEpidemiology, characteristics, and outcomes of... : Journal of Gastroenterology & Hepatology

For ascites, perform diagnostic paracentesis rather than relying on fever, leukocytosis, or abdominal symptoms. Obtain blood and urine cultures in parallel, and pursue source imaging or procedural source control when clinical findings indicate infection outside the peritoneum. Infection must be actively sought because it can be both a precipitant and a later complication of multiorgan failure. Wolters KluwerAcute-on-chronic liver failure and immune... : Hepatology CommunicationsBMJUK guidelines on the management of variceal ...

For suspected variceal hemorrhage, obtain CBC, coagulation testing, liver and renal chemistries, type and crossmatch, and arrange urgent endoscopic management. Terlipressin is used for suspected variceal bleeding at 2 mg IV every 4 hours in the cited guideline; peripheral vasoconstriction may manifest as painful hands and feet. BMJUK guidelines on the management of variceal ...

When acute liver injury may represent acute liver failure rather than ACLF, do not accept a nodular liver on imaging as definitive cirrhosis: massive hepatic necrosis with regeneration can mimic cirrhosis radiographically. Promptly obtain viral hepatitis serologies including hepatitis A through E and autoimmune serologies; these results can identify treatable etiologies that change definitive therapy and transplant assessment. aasldManagement of Acute Liver Failure | AASLD

Precipitant-directed diagnostic actions in ACLF. Wolters KluwerEpidemiology, characteristics, and outcomes of... : Journal of Gastroenterology & HepatologyaasldManagement of Acute Liver Failure | AASLDBMJUK guidelines on the management of variceal ...
Clinical patternTests or proceduresDecision consequence
Ascites with acute deteriorationDiagnostic paracentesis; blood and urine cultures. BMJUK guidelines on the management of variceal ...Identify peritoneal or systemic infection and institute antimicrobial therapy and source control as indicated. Wolters KluwerAcute-on-chronic liver failure and immune... : Hepatology CommunicationsBMJUK guidelines on the management of variceal ...
Upper gastrointestinal bleedingCBC, coagulation profile, renal and liver tests, type and crossmatch; emergency endoscopy. BMJUK guidelines on the management of variceal ...Treat suspected portal-hypertensive bleeding with terlipressin and endoscopic hemostasis. BMJUK guidelines on the management of variceal ...
Disproportionate acute hepatocellular injury or uncertain chronicityHepatitis A-E serologies and autoimmune serologies; interpret nodular imaging cautiously. aasldManagement of Acute Liver Failure | AASLDIdentify acute viral or autoimmune disease that changes cause-directed management and transplant planning. aasldManagement of Acute Liver Failure | AASLD
Worsening creatinineAssess for HRS-AKI and competing renal etiologies; follow response to albumin and vasoconstrictor therapy when HRS-AKI is diagnosed. BMJGuidelines on the management of ascites in cirrhosis - GutBaseline creatinine helps estimate likelihood of response and urgency of renal-support planning. BMJGuidelines on the management of ascites in cirrhosis - Gut

Critical Care

Support failing organs while treating liver-specific complications

The immediate goal is to reverse precipitant-driven deterioration and preserve candidacy for recovery or liver transplantation.

Use a simultaneous management model: cardiovascular stabilization, circulatory support, airway protection, treatment of the precipitating event, and aggressive support of failing organs. Critical-care management should begin before all etiologic studies return because ACLF is characterized by high short-term mortality and may progress quickly. ScienceDirectBridging the critically ill patient with acute to chronic liver ...aasldManagement of Acute on Chronic Liver Failure in the ...

For hepatic encephalopathy, administer lactulose 20 g orally every hour as initial therapy in the cited AASLD educational guidance, while continuing to identify infection, bleeding, metabolic abnormalities, and alternative neurologic diagnoses. Airway protection takes priority over enteral administration in grade III-IV encephalopathy or when Glasgow Coma Scale score is 8 or lower. aasldManagement of Acute on Chronic Liver Failure in the ...

For HRS-AKI, use human albumin solution plus a vasoconstrictor, particularly terlipressin. Randomized trials cited in ascites guidance found that the terlipressin-albumin combination improves renal function and short-term mortality; a higher baseline creatinine predicts nonresponse. BMJGuidelines on the management of ascites in cirrhosis - Gut

For tense or refractory ascites requiring large-volume paracentesis, give plasma expansion when more than 5 L are removed. Albumin is generally not required for removal of less than 5 L unless ACLF is present; in ACLF, albumin after lower-volume paracentesis reduced renal impairment, hyponatremia, and death in a study of 80 patients. BMJGuidelines on the management of ascites in cirrhosisBMJGuidelines on the management of ascites in cirrhosis - Gut

Consider transjugular intrahepatic portosystemic shunt cautiously in advanced disease. Factors warranting caution include age over 70 years, bilirubin above 50 micromol/L, platelet count below 75 × 10^9/L, MELD score 18 or greater, current hepatic encephalopathy, active infection, or hepatorenal syndrome. BMJGuidelines on the management of ascites in cirrhosis - Gut

Selected ACLF interventions with decision thresholds. BMJGuidelines on the management of ascites in cirrhosisBMJGuidelines on the management of ascites in cirrhosis - GutaasldManagement of Acute on Chronic Liver Failure in the ...BMJUK guidelines on the management of variceal ...
ProblemActionThreshold or important qualifier
Severe encephalopathyIntubate for airway protection; treat with lactulose 20 g orally every hour when enteral administration is safe. aasldManagement of Acute on Chronic Liver Failure in the ...Glasgow Coma Scale score 8 or lower or grade III-IV encephalopathy supports intubation. aasldManagement of Acute on Chronic Liver Failure in the ...
HRS-AKIUse albumin plus vasoconstrictor therapy, particularly terlipressin. BMJGuidelines on the management of ascites in cirrhosis - GutHigher baseline creatinine predicts lower response probability. BMJGuidelines on the management of ascites in cirrhosis - Gut
Large-volume paracentesisUse plasma expansion. BMJGuidelines on the management of ascites in cirrhosisBMJGuidelines on the management of ascites in cirrhosis - GutAlways use when more than 5 L are removed. BMJGuidelines on the management of ascites in cirrhosisBMJGuidelines on the management of ascites in cirrhosis - Gut
Paracentesis below 5 LConsider albumin in ACLF. BMJGuidelines on the management of ascites in cirrhosisBMJGuidelines on the management of ascites in cirrhosis - GutRoutine plasma expansion is not necessary without ACLF. BMJGuidelines on the management of ascites in cirrhosisBMJGuidelines on the management of ascites in cirrhosis - Gut
Suspected variceal bleedingTerlipressin 2 mg IV every 4 hours plus emergency endoscopic management. BMJUK guidelines on the management of variceal ...Monitor for peripheral vasoconstriction. BMJUK guidelines on the management of variceal ...

When acute variceal bleeding coexists

Use terlipressin for suspected variceal hemorrhage and urgent endoscopic management. The cited guideline recommends terlipressin 2 mg IV every 4 hours and notes evidence of reduced failure to control bleeding and improved survival compared with placebo; monitor for ischemic peripheral vasoconstrictive effects. BMJUK guidelines on the management of variceal ...

Disposition

Use serial organ-failure scores to trigger transplant decisions

Prognosis should be updated after early resuscitation rather than inferred from baseline cirrhosis severity alone.

Track ACLF grade and CLIF-C ACLF score serially. In a multicenter ICU analysis, 90-day mortality was 33% with ACLF grade 1, 40% with grade 2, and 74% with grade 3 at admission. A CLIF-C ACLF score above 70 at admission or day 3 was associated with approximately 90% 90-day mortality. Wolters KluwerDynamic Prognostication in Critically Ill... : Critical Care Medicine

CLIF-C ACLF incorporates CLIF-OF, age, and white blood cell count. In an external prospective cohort summarized in a review, 28-day mortality was below 20% with CLIF-C ACLF below 45 and above 65% with a score above 65; this score may outperform Child-Pugh, MELD, and MELD-Na for ACLF prognostication in some cohorts. Wolters KluwerAcute-on-Chronic liver failure – A brief overview : Journal of Integrative Medicine and Research

Refer early to a liver-transplant center after initial stabilization. Critical-care bridging aims to control precipitants and support organs so the patient can undergo salvage liver transplantation or recover; the window for transplantation may be narrow. Carefully selected patients with advanced ACLF can have encouraging post-transplant outcomes. BMJAcute-on-chronic liver failure: definition, prognosis and ...ScienceDirectBridging the critically ill patient with acute to chronic liver ...

Do not use a high prognostic score as an isolated declaration of futility. A CLIF-C ACLF score of 65 or greater predicts a lower likelihood of favorable outcome after liver transplantation, while trajectories of organ recovery, infection control, hemodynamic stability, and center-specific candidacy assessment remain central to the decision. Wolters KluwerLiver Transplantation in Acute‐on‐Chronic Liver...Wolters KluwerDynamic Prognostication in Critically Ill... : Critical Care Medicine

Prognostic findings that should prompt time-sensitive goals-of-care and transplant discussions. Wolters KluwerAcute-on-Chronic liver failure – A brief overview : Journal of Integrative Medicine and ResearchWolters KluwerLiver Transplantation in Acute‐on‐Chronic Liver...Wolters KluwerDynamic Prognostication in Critically Ill... : Critical Care Medicine
FindingObserved prognosisClinical use
ACLF grade 1 at ICU admission90-day mortality 33% in a multicenter ICU cohort. Wolters KluwerDynamic Prognostication in Critically Ill... : Critical Care MedicineContinue aggressive precipitant treatment and serial reassessment. ScienceDirectBridging the critically ill patient with acute to chronic liver ...Wolters KluwerDynamic Prognostication in Critically Ill... : Critical Care Medicine
ACLF grade 3 at ICU admission90-day mortality 74% in the same cohort. Wolters KluwerDynamic Prognostication in Critically Ill... : Critical Care MedicineUrgently reassess trajectory, transplant feasibility, and goals of care. ScienceDirectBridging the critically ill patient with acute to chronic liver ...Wolters KluwerDynamic Prognostication in Critically Ill... : Critical Care Medicine
CLIF-C ACLF score above 70 at admission or day 3Approximately 90% 90-day mortality. Wolters KluwerDynamic Prognostication in Critically Ill... : Critical Care MedicineTrigger multidisciplinary reassessment; do not rely on the score alone for transplant futility decisions. Wolters KluwerLiver Transplantation in Acute‐on‐Chronic Liver...Wolters KluwerDynamic Prognostication in Critically Ill... : Critical Care Medicine
CLIF-C ACLF score 65 or greaterLower likelihood of favorable post-transplant outcome. Wolters KluwerLiver Transplantation in Acute‐on‐Chronic Liver...Use as one component of transplant selection alongside organ-function trajectory and clinical reversibility. ScienceDirectBridging the critically ill patient with acute to chronic liver ...Wolters KluwerLiver Transplantation in Acute‐on‐Chronic Liver...

Ongoing Management

Monitor for reversible trajectory and prevent recurrent decompensation

A favorable response is defined by improving organ function after precipitant control, not by bilirubin change alone.

During ICU care, use daily reassessment of vasopressor requirement, oxygenation or ventilator need, renal function, mental status, infection control, and ACLF score to determine whether the patient is improving toward transplantability or accumulating irreversible contraindications. Dynamic prognostication at day 3 adds clinically meaningful information beyond admission severity. ScienceDirectBridging the critically ill patient with acute to chronic liver ...Wolters KluwerDynamic Prognostication in Critically Ill... : Critical Care Medicine

After survival of the acute episode, address modifiable drivers of decompensated cirrhosis. The transition from compensated to decompensated cirrhosis is marked by ascites, variceal hemorrhage, or hepatic encephalopathy and is associated with an estimated 3- to 5-year survival; transplant evaluation is recommended in the absence of contraindications. Treat ongoing causal disease such as chronic viral hepatitis, alcohol exposure, or obesity as part of recurrence prevention. BMJAcute-on-chronic liver failure: an update

For patients not proceeding to transplantation because of persistent multiorgan failure, contraindications, or patient preferences, align ongoing organ support with prognosis and documented goals of care. Prognostic scores inform this conversation but should be interpreted alongside recovery trajectory and the possibility of reversible infection, bleeding, or renal dysfunction. ScienceDirectBridging the critically ill patient with acute to chronic liver ...Wolters KluwerLiver Transplantation in Acute‐on‐Chronic Liver...Wolters KluwerDynamic Prognostication in Critically Ill... : Critical Care Medicine

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