Liver Disease + Gall Bladder + Pancreas Flashcards
What does excessive bilirubin level in blood cause
Jaundice
What is the prehepatic cause of jaundice
Haemolytic anaemia - excess breakdown of RBC, releasing excess bilirubin
Sickle cell disease
What organs breakdown RBC
spleen
How is bilirubin metabolised
Metabolised in the liver, undergoes phase 2 metabolism - glucoronidation, making bilirubin more water soluble so it can be excreted in bile
What is glucoronidation
Addition of glucuronic acid by glucuronosyltransferase (UGT1A1)
Two types of hepatic causes of jaundice
Unconjugated - abnormal metabolism of bilirubin
Conjugated - abnormal excretion of conjugated bilirubin
What are the unconjugated hepatic causes of jaundice
Gilbert’s syndrome
hyperthyroidism
high serum levels of gentamicin
What are the conjugated hepatic causes of jaundice
hepatocellular injury - viral hepatitis / autoimmune hepatitis / alcoholic hepatitis / non-alcoholic fatty liver disease/ drug induced liver injury
Cholestatic liver disease - PBC, PSC
Sarcoidosis / amyloidosis / tuberculosis
What are the post hepatic causes of jaundice
Cholestatic liver diseases (PBC, PSC, malignancy, gallstones)
biliary atresia
strictures of biliary duct
What are cholestatic liver diseases
Decrease in bile flow due to abnormal excretion or obstruction of the bile ducts
Examples of cholestatic diseases
Malignancy at head of pancreas
primary sclerosing cholangitis
primary biliary cholangitis
gallstones
What is acute liver failure
Loss of liver function due to acute massive necrosis of hepatocytes
In absence of chronic liver disease
Causes of acute liver failure
Drug induced liver injury
viral hepatitis
alcohol
Budd chiari syndrome
What is the most common cause of acute liver failure
Drug induced liver injury
What drugs can cause drug induced liver injury
Paracetamol overdose
Co-amoxiclav / flucloxacillin / NSAID
Statins, ecstasy
What are the characteristic findings of acute liver failure
Hepatic encephelopathy + coagulopathy + hypoglycaemia + jaundice
What is hepatic encephelopathy
Altered mental state
Confusion
Asterixis (liver flap)
Due to build up of toxic ammonia
Symptoms of ALF
Jaundice HE easy bruising (due to coagulopathy) Abdominal pain Infection circulatory failure
What causes circulatory failure
Massive necrosis leads to massive inflammation, massive vasodilation -> very low SVR
Diagnosis of ALF
INR - coagulability Blood glucose level Ammonia level LFT - albumin / ALP / gGT / bilirubin Imaging
Treatment of ALF
IV fluids
Vitamin K and fresh plasma with clotting factors
Transplant
Sepsis 6 bundle if indicated
Complications of acute liver failure
Infections Circulatory failure High output HF Cerebral injury Haemorrhage
Why does circulatory failure occur in ALF
Because massive necrosis -> inflammation -> vasodilation -> low SVR
What is the end stage of liver disease
Cirrhosis