liver Flashcards
ACUTE liver failure is liver failure without _______, with _________pathy and _______ _______pathy, within ___ weeks of onset
without chronic liver dis, coagulopathy, hepatic encephalopathy, 28
what is the most common cause of acute liver injury?
drugs eg alcohol, paracetamol, antidepressants, cocaine, ecstasy
4 infective causes of acute liver injury?
hep a, hep b, cmv, ebv, malaria, yellow fever
why is there systemic multi-organ failure in acute liver failure?
The hepatocytes die by necrosis. This means that the liver cannot clear the toxins anymore, so there is an inflammatory response around the body.The systemic inflammatory response causes vasodilation and hypo perfusion, which injures the rest of the organs through ischaemia
some symptoms of acute liver failure?
asterixis, flapping tremour, fatigue, jaundice, malaise, bleeding, bruising, haptatic encephalopathy, ruq pain, hypoglycaemia, pear drops smell (fetor hepaticus)
what would high ALT mean?
hepatocyte damage
what would high AST mean?
alcohol
what would high ALP mean?
bile duct pathology - if GGT is also raised
bone pathology - if everything else is normal
what would high GGT mean?
bile duct, obstruction, alcohol, phenytoin
what would the clottting profile look like in acute liver failure?
low albumin
high inr
high prothrombin time
what
what imaging would you use in liver failure?
ultrasound to see liver size
doppler to see hepatic and portal veins
two supplements you would want to give in acute liver failure?
thiamine and folate
what can you give for seizures in acute liver failure
phenytoin
5 aetiologies of chronic liver dis?
alcohol inf (hep b/c) alpha 1 antitrypsin def wilsons autoimmune cholangitis ischaemia drug
5 pathophysiological/histological features of chronic liver disease?
steatosis bands of cirrhosis/fibrosis regenerative nodulues hepatitis balooned hepatocytes irreversible remodelling
5 signs of chronic liver dis?
sarcopenia coagulopathy ascites hepatomegaly jaundice caput medusa spider naevi palmar erythema asterixis
5 symptoms of chronic liver failure?
haematemesis fatigue itching bruising anorexia confusion
what abnormal lfts are typical of chronic liver failure?
high bilirubin
low albumin
high pt
how do you assess the amount of fibrosis in the liver?
transient elastography
what is gold standard for chronic liver disease?
liver biopsy (but is rarely done cos spenny)
what does fbc in chronic liver dis show?
thrombocytopenia
how to treat hepatic encephalopathy?
laxatives
how to treat ascites?
aldosterone antagonist or paracentesis
how to treat spontaneous bacterial peritonitis?
abx
albumin solution
cholecystitis vs cholangitis?
cholecystitis = inflam of the gallbladder (usually because it is blocked at the neck by a stone) cholangitis = inflam of the billiary tree tubes - gallstones, ercp, cholangiosarcoma
3 aetiologies of gall stones?
too much cholesterol
poor bladder emptying
rbc turnover
simply, what’s in a gallstone?
cholesterol and bile salts
what is billiary colic?
intermittent pain caused by temporary obstruction
what is acalculous cholecystitis?
inflammation of the gallbladder not caused by a stone
where is the pain in gallbladder pathology?
ruq
symptoms of biliary colic?
intermittent ruq/epigastric pain
worse after eating
nausea
symptoms of acute cholecystitis?
severe constant ruq pain
worse on inspiration
referred to shoulder c3,4, 5 if severe
murphys sign
symptoms of ascending cholangitis?
ruq pain
jaundice, dark urine, itching, coagulopathy
rigors
fever
how can you treat cholecystitis?
ercp to remove stones
remove the gallbladder if stones are reoccuring
drain the gallbladder
4 pathophysiological effects of alcohol on the liver?
uses up NAD and creates NADH
NADH decreases gluconeogenesis and increases fatty acid oxidation
free radicals produced
activates kupffer ells which release TNFa and ROS
oxidative stress leads to more inflammation
end result of all the inflammation is fibrosis
3 stages of alcoholic liver disease and are they reversible?
- alcohol related fatty liver - reverses in 2 weeks
- alcoholic hepatitis - reverses in 2 months
- cirrhosis - not reversible
presentation of alcoholic fatty liver?
vague or no symptoms
hepatomegaly
5 clinical presentations of hepatitis/cirrhosis?
hepatomegaly jaundice spider naevi caput medusa asterixis clubbing oedema ascites bruising high temp palmar erythema gynaecomastia
what do you see on an fbc in alcoholic liver dis?
increased cell volume (macrocytic anaemia)
what do you see in alcoholic liver disease, on LFT?
raised AST
slightly raised ALT (AST>ALT)
raised GGT
if severe: low albumin, high PT, high bilirubin
3 changes you see on ultrasound, in alcoholic liver dis?
fatty
cirrhosis
ascites
changes in blood vessels
why might you do an endoscopy in liver dis?
to look for oesophageal varices
two screening question systems for alcoholism?
CAGE
AUDIT
management of alcoholic liver disease?
drinking cessation [supported]
high thymine, high protein diet
short period of steroids
transplant
aetiology of pancreatitis? (5)
i - iatrogenic - ERCP is most common iatrogenic cause g - gallstones - most common e - ethanol t - trauma s - scorpion bite m - measles/mumps/mycoplasma a - autoimmune s - steroids h - hypercalcaemia e - ERCP d - drugs eg valproate
aetiology of chronic pancreatitis? (3)
repeated acute
alcohol
CF
tumours
3 enzymes secreted by the pancreas?
amylase, lipase, trypsin
2 pathophysiological effects of pancreatitis?
hyperglycaemia
malabsorption
what is the pain like in pancreatitis?
severe generalised or upper abdo radiating to the back worse after eating relieved by sitting forward
clinical presentations of pancreatitis?
cullens/fox sign grey-turner syndrome abdo distention steatorrhoea nausea/vom diabetes-like/hyperglycaemia weight loss jaundice
some blood tests you might do in pancreatitis?
serum amylase (not specific but 1st line) serum lipase hba1c (esp if chronic) igG4 - if autoimmune suspected LFT - AST suggests alcohol is a cause
what imaging for pancreatitis?
USS
MRCP to look for gallstones
an example of a pancreatic enzyme replacement? what could you give it with?
creon
a PPI
What U&E disturbance is there in cirrhosis?
hyponatraemia
high urea and creatinine
on an USS what would you see in cirrhosis?
nodules corkscrew arteries large portal vein ascites splenomegaly
3 complications of cirrhosis
portal hypertension
varices
ascites
where does the portal vein drain from?
superior mesenteric and splenic veins
3 common places for varices to form?
varices form where the portal circulation meets the systemic circulation, eg:
- gastro oesophageal junction
- ileo caecal junction
- rectum
- umbilical vein (forms caput medusae)
management of stable varices?
- propanolol
- elastic band ligation
- TIPSS: shunt blood from portal –> systemic circ , if refractory to other treatments
management of bleeding varices?
fluids
elastic band ligation/schlerotherapy/blakemore tube
-vasopressin analgue eg terlepressin to vasoconstrict
clotting factors and vit K
abx for peritonitis
what is ascites?
accumulation of fluid in the peritoneal cavity
non liver causes of ascites? (3)
peritonitis
water retention
cardiac failure
in portal hypertension, _____ is low, so the ________ releases _______ which worsens ascites
renal perfusion / kidney/ renin
transudative vs exudative ascites & some causes of each?
transudative: low protein in the exudate (below 25); caused by portal htn, malnutrition, fluid retention
exudative: high protein - malignancy and pregnancy
what does the SAAG (serum albumin ascites gradient) tell you?
if it is more than 11, it is transudative ascites, eg caused by portal hypertension
what hormone increases gallbladder contraction?
CCK in response to fatty food
what LFT result is the best indicator of liver function in chronic disease?
albumin
what is gilbert’s syndrome?
gGT deficiency, high bilirubin, jaundice, other LFTs normal, autosomal recessive
raised bilirubin and jaundice but normal LFTs suggests..
gilbert’s
haemolytic anaemia
if the urine is dark and the stools are pale the cause is most likely..
post hepatic obstruction
how does haemolytic anaemia affect jaundice/stools/urine?
there is yellow skin but the pathology is not with the production of bile (so stools not pale) or excretion of it, so the stools and urine are normal
in biliary obstruction, are there high levels of conjugated or unconjugated bilirubin?
conjugated bilirubin is high
unconj and hb are normal
which bacteria is associated with bloody diarrhoea, haemolysis, uraemia and anaemia?
ecoli 0157 h7
which bacteria is associated with RLQ pain and pork?
yersinia