due to
excess absorption ammonia + glutamine from bacterial breakdown of proteins in gut
features
confusion, alt GCS
asterix
constructional aprazia
triphasic slow waves on ECG
raised ammonia
Grade I
irritablitity
Grade II
confusion, inappropriate behaviour
Grade III
incoherent ,
restless
Grade IV
coma
precipitating factors
infection GI bleed post TIPSS constipation sedatives, diuretics hypokalaemia renal failure inc dietary protein
secondary prophylaxis
lactulose, with addition of rifaximin