Monday, February 24, 2020

Acute Liver Failure

Diagnosis : 
Criteria for Diagnosis in Adults 
When a patient presents with Jaundice < 26 weeks and on examination has encephalopathy with no stigmata of chronic liver disease. On evaluation has Coagulopathy (INR>1.5) patient is said to have acute liver failure. While the viral cause remains the commonest etiology an alternative diagnosis must be sought.
Approach : 
  After a careful history from the attendants proceed with the following investigations:  Never miss Malaria, poison intake, Leptospira and scrub typhus, etc
  • Hemogram, RFT, LFT, INR, ECG
  • Monitoring of Blood sugars 
  • Arterial blood gas
  • Arterial ammonia  
  • Blood culture 
  • IgM anti HAV,HBsAg,anti-HBc ,IgM,anti HEV,anti HCV  
  • If Wilson suspected: Ceruloplasmin levels, KFRing/Urinary copper  
  • When there is an abnormal neurological  examination proceed with Brain imaging (CT/MRI)  
  • Pregnancy test in females childbearing age group.
Management :
  • Please admit the patient in an ICU   
Supportive treatment 
  • Infection: Surveillance  & Prompt treatment as infection increases mortality 
  • Coagulopathy : (Although the role is  debatable )Injection Vit.K 10mg IV OD for 3 days  
  • Transfuse platelets/FFP for invasive procedures /active bleeding 
  • Injection PPI 20mg IV BD for stress ulcers 
  • Volume replacement 
  • Pressure support 

Disease-specific :

Grade I, II hepatic encephalopathy 
  • IV  -NAC: 150mg/kg in D5 over 15 min, 
  • then  50 mg/kg given over 4hrs  
  • followed by 100mg/kg over 16hrs  in patients 

HBV: Entecavir,0.5mg once daily through Ryles tube  

Autoimmune hepatitis: Prednisolone 40-60mg /day (With mild Hepatic encephalopathy) 

Consider Liver transplantation :

Kings criteria for Liver transplantation :
The presence of one of the following should prompt a referral/transfer to a liver transplantation center:

  • Acidosis (admission arterial pH < 7.30) OR
  • Hepatic encephalopathy (grade III or IV), AND coagulopathy (PT > 100 s), AND acute kidney injury (creatinine > 3.4 mg/dL), OR
  • Hyperlactatemia (4-hour lactate > 3.5 mmol/L, or 12-hour lactate > 3.0 mmol/L), OR
  • Hyperphosphatemia (48-96 hour phosphate > 3.7 mg/dL) in patients with acetaminophen-induced fulminant hepatic failure.