Liver Flashcards
What are the functions of the liver and what can go wrong?
-Oestrogen level regulation - spider navei, palmer erythema
-Albumin - ascites + oedema
-Clotting factors - bleeding disorders
-Storage of vits/Fe/Cu/fat -Wilsons, haemachromatosis
-Metabolism of carbs
-Immunity (Kupffer)-SBP
-Detoxification -hepatic encephalopathy
-Billirubin metabolism- jaundice
What are the markers of liver function that indicate liver damage?
Bilirubin- Conj/unconj =High
Albumin =Low
Prothrombin time =High
What enzymes are increased tat would suggest liver damage?
-ALT =Alanine transaminase
-AST =Aspartate aminotransferase
Both found in liver, heart, kidney and lungs
-GGT=Gamma glutamyl transferase
-ALP= Alkaline phosphate
What would AST:ALT typically suggest?
> 2:1. - ALD
4.5:1 -Wilosns or hyperthyroid
<0.9:1 - Suggest NAFLD
What would high GGT suggest?
High in ALD + helps differentiate high ALP as a hepatic or bony cause
What would high ALP suggest?
High in billiary tree specific damage + bony pathology
What is liver failure?
Liver loses its ability to repair and regenerate leading to decompensation
What is decompensation?
Characterised by abnormal bleeding, ascites, hepatic encephalopathy and jaundice
What is acute liver failure?
Liver injury accompanied with hectic encephalopathy, jaundice and coagulopathy(>1.5INR), and ascites in a patient with a previously normal liver
What is fulminant liver failure?
rare syndrome of massive hepatocyte necrosis (histologically = multiacinar necrosis)
- hyper acute (HE within 7 days of jaundice)
-acute (8-28 days HE within jaundice)
-Subacute (5-26 weeks)
What is the most common cause of fulminant liver failure?
Paracetamol overdose (50%case sin the UK)
What is acute on chronic liver failure?
Abrupt decline in patient with chronic liver Sx
What is Chronic liver failure?
Patient with progressive Hx of liver disease;
Hepatitis -> fibrosis-> compensated cirrhosis-> decompensated cirrhosis (ESLF)
What are the causes of acute liver failure?
-Viral = HEP A,B,E ; CMV;EBV
-Autoimmune hep
-Drugs - paracetamol, alcohol, ecstasy
-HCC
-Metabolic - Wilkinsons, haemochromatosis, A1ATD
-Budd Chiari
What is the presentation of acute liver failure?
Acute Px of Jaundice, coagulopathy, HE:
-spider naevi
-fetor hepaticus -breath
-caput medusae - distended abdo BVs
Dupuytren’s contracture - abnormal thickening of skin on palms of hands
What is West haven criteria grades 1-4?
- Severity of encephalopathy (HE)
1. altered mood, sleep issues
2. lethargy, mild confusion, asterixis
3.marked confusion
4. comatose
What is the diagnosis of acute liver failure?
Bloods: LFTs (high bilirubin, low albumin, Hugh PT/INR)
High serum AST/ALT, high ammonia, low glucose
Imaging - EEG- grade HE
USS abdo to check Budd chiari
Microbiology to rule out infections - blood culture, urine culture, ascitic tap
What is Budd Chiari?
an uncommon disorder characterized by obstruction of hepatic venous outflow.
What is the treatment for acute liver failure?
Acutely - ABCDE, fluid, analgesia
Tx underlying cause + complications
What are the complications and treatments of acute liver failure?
Increased ICP = IV Mannitol
HE= Lactulose (increase ammonia excretion)
Ascites = diuretics
Haemorrhage = Vit K
Sepsis = sepsis 6
What is chronic liver failure?
Progressive liver disease over 6+ months due to repeated liver insults
What are the causes of chronic liver failure?
ALD - mc
NALD
Viral - hep BC
+ metabolic, Budd chiari, drugs, autoimmune, PBC, PSC
What is the pathology of chronic liver failure?
Hepatitis/ Cholestasis –> fibrosis(reversible damage) –> cirrhosis (irreversible) -> either compensated or decompensated (ESLF)
What is the Child Pugh score?
Assessing prognosis and extent of Tx required for chronic liver failure; essentially decompensated cirrhosis
-Classes scores ABC
What consists of the child Pugh score?
- billirubin
-ascites presence
-serum albumin
-PT/INR
-Hepatic encephalopathy
What are the ABC Child Pugh class system?
A = 100% 1year survival
B=80% 1 year survival
C=45% 1 year survival
What is Meld score?
Model for end stage liver disease, stratifies severity of ESLD for transplant planning
What is a risk factor for developing HCC?
ESLF - decompensated cirrhosis
What is the presentation of decompensated ESLF?
- jaundice
-HE
-Coagulopathy
-Ascites
-Portal HTn +oesophageal varices
-low serum albumin
What are the patient symptoms of chronic liver failure?
- jaundiced
-Ascites
-HE
-Portal HTN+ oesophageal varices
-Caput medusae
-Spider nave
-Palmar erythema
-clubbing
-fetor hepaticus
What is the diagnosis of chronic liver failure?
Liver biopsy - GS - needed to determine extend of CLD (fibrosis vs cirrhosis)
-LFT,Imaging,USS, ascitic tap culture
What is the treatment of chronic liver disease?
-Prevent progression - lifestyle modifying (low alcohol, low BMI, avoid drugs)
-Consider liver transplant (if decompensated liver)
-Manage complications
HE- lactulose
Ascites- diuretics
Oesophageal varices rupture
What is alcoholic liver disease?
Liver disease caused by excessive alcohol intake - most common cause of liver failure
What are the risk factors of alcoholic liver disease?
-chronic alcohol
-obesity
-smoking
What is the pathology of alcoholic liver disease?
Steatosis (fatty liver, undamaged) -> alcoholic hepatitis (with mallory bodies) -> Alcoholic cirrhosis (micro nodular)
What is the presentation of alcoholic liver disease?
-Early stages may show very little symptoms/ signs
-Later more severe stages = chronic liver failure Sx + alcohol dependency
- Jaundice, hepatomegaly, palmar erythema, Dupuytren contracture , ascites, HE, spider naevi, caput medusae, easy bruising
What does an alcohol dependency questionnaire include ?
CAGE and audit
- 10 questions alcohol use disorder test
-2 or more = dependent
What is the diagnosis of alcoholic liver disease?
Bloods - LFT= high bilirubin, low albumin, high PT, high GGT(AST:ALT >2)
-FBC = macrocytic non megaloblastic anemia
Biopsy needed confirm extent of cirrhosis
- inflammation, necrosis, mallory cytoplasmic inclusion bodies
What is the conservative treatment of alcoholic liver disease?
Conservative = stop alcohol - give diazepam for delirium tremors + with drawl Sx
-healthy diet, low BMI
What are the withdrawal Sx of alcohol?
Tremors
Agitation
ataxia
Disorientation
What is the pharmacological treatment for alcoholic liver disease?
Steroids short term
B1 + folate supplements
Maddrey’s discriminant - severity of ALD + treatment requirements
What is the surgical treatment for ALD?
Liver transplant for ESLF cases- abstain for 3+ months from alcohol before consideration
What are the complications and treatments for ALD?
Pancreatitis = IgE smashed
HE - lactulose
Ascites- diuretics
HCC- chemo/surgery
Mallory weiss tear
Wernicke Korsakoff syndrome
What is Wernicke Korsakoff syndrome?
Combined B1 deficiency (alcohol causes B1 deficiency ) and alcohol withdrawal Sx - ataxia, nystagmus, encephalopathy
What is the treatment for wernicke Korsakoff syndrome?
IV Thiamine
What is non alcoholic liver disease?
Chronic liver disease not due to alcoholism, results from fat deposition
What are the risk factors of NAFLD?
obesity
HTN
Hyperlipidemia
T2DM
FHx
Endocrine disorders
Drugs - NSAIDs/amiodarone
What is the pathology of NAFLD?
Hepatosteatosis (NAFLD) -> non alcoholic steatohepatitis -> fibrosis -> cirrhosis
What is the presentation of NAFLD?
typically aSx; any findings are incidental initially
- if very severe present with signs of liver failure
What is the diagnosis of NAFLD?
Bloods -deranged LFTs
(high PT/INR, low albumin, high bilirubin)
FBC - thrombocytopenia, hyperglycaemia
Imaging- 1st line for suspected NAFLD = USS abdomen
Assess risk of fibrosis with non invasive scoring system therefore avoid invasive biopsy
What is the treatment for NAFLD?
Lose weight (low BMI) and control risk factors :
-statins
-metformin
-ACEi
VITAMIN E - improves steatotic/ fibrotic liver appearance
What are the complications of NAFLD?
- HE
-Ascites
-Portal HTN
-Oesophageal varices
What is viral hepatitis?
Inflammation of the liver as a result of viral replication within the hepatocytes
What is hepatitis A?
-Acute, mild, positive strand RNA
-Faeco-oral spread
-Picornavirus
-associated with travel, endemic in Africa
-notifiable disease
What are the risk factors of HEP A?
- overcrowding
-poor saturation
-shellfish
-travel
What is the pathology of HepA?
incubation for 2 week - replicated in liver and excreted in bile
- then self limiting within 6 weeks
What is the presentation of hep A?
- prodomal phase (1-2weeks)- malaise, n+v, fever
-Then jaundice, dark urine, pale stools, hepatosplenomegaly
What is the diagnosis of hep A?
Bloods = raised ESR + leukopenia
LFT= raised bilirubin when icteric
HAV serology = HAV IgM = acutely infected
What is the treatment for HepA?
Supportive - travellers vaccine available
What is a complication of hep A?
Fulminant liver failure
What is HEP E?
-Acute, ssRNA
-faecal-oral spread
-calcivirus
What is the epidemiology of HEP E?
- commoner than HAV in UK
- associated with undercooked pork
-common in inso-china