Chronic Liver Disease, Cirrhosis, Gallstone problems Flashcards
(78 cards)
Cirrhosis histology
Px: necrosis of hepatic parenchyma causes connective tissue proliferation and nodular regeneration
Acute liver failure causes:
Infection [3]
Toxins [4]
Other [3]
Obstetric [2]
Ischemic [1]
What is a trigger of cirrhosis and decompensated liver failure?
o Infection: hepatitis A or B, CMV, EBV, leptospirosis
o Toxins: alcohol, paracetamol, isoniazid, halothane
o Other: Budd-Chiari, Wilson’s, autoimmune hepatitis
o Obstetric: eclampsia, acute fatty liver of pregnancy
o Ischaemic hepatitis: post cardiac arrest
Cirrhosis can be triggered by constipation
Liver failure
Classic triad
Presentation [5]
• Classic triad: encephalopathy, jaundice, coagulopathy
- jaundice
- oedema and ascites
- bruising
- encephalopathy (asterixis and constructional apraxia (unable to draw 5-pointed star)
- fetor hepaticus
Investigation of liver failure [7]
- FBC: leucocytosis (infection), anaemia (GI bleed), reduced MCV (alcohol)
- U&E and creatinine: hepatorenal syndrome
- LFT
- ABG: metabolic acidosis
- Clotting: increased INR
- Glucose: hypoglycaemia (gluconeogenesis is the last function to fail)
- Underlying cause: liver screen incl. paracetamol screen
Mx of liver failure [3]
Monitoring [3]
ITU admission with mx of underlying cause
• Nutrition: via NGT with high carbs, PABRINEX
• Stress ulcer prevention: PPI
• Monitoring:
- fluid balance (urinary and CVP catheters)
- glucose (1-4hrly with 10% dextrose IV 1L/12h)
- bloods (daily FBC, U&E, LFT, INR)
Liver transplantation in acute failure
King’s college hospital criteria: PCM induced [4] and non-PCM induced [6]
o Paracetamol induced: - pH<7.3 24h after ingestion
- OR ALL 3 of
1. PT >100s
2. Cr >300mM
3. grade 3 or 4 encephalopathy
o Non-paracetamol induced:
- PT >100s
- OR 3 out of 5 of
1. drug induced
2. <10 or >40y/o
3. >1w from jaundice to encephalopathy
4, PT >50s
5. bilirubin >300uM
Managing cirrhosis [2]
- Prevent CX
- Laxatives
- Vitamin K
- Nutritional support
- Human albumin solution
- CIPRO - Liver transplant
What are cirrhosis complications? [4]
o Decompensation: hepatic failure
o Spontaneous bacterial peritonitis
o Portal hypertension: splenomegaly, ascites, varices, encephalopathy
o HCC: increased risk
Liver transplant indictions in non-acute liver failure [2]
Contraindicated [5]
Types [2]
Advanced cirrhosis
HCC
o CI: extra hepatic malignancy, severe cardiorespiratory disease, sepsis, HIV infection, non-compliance with therapy
o Types: cadaver (heart beating or heart not beating), live (right lobe)
Liver transplant mx post-op [2]
Complications [5]
12-24h in ITU
Immunosuppression
Complication:
- acute rejection 5-10d after, sepsis, hepatic artery thrombosis, chronic rejection, disease recurrence (HBV)
Hepatic encephalopathy
Pathophysiology [4]
- reduced hepatic metabolic function causes conversion of liver toxins directly into systemic system
- with ammonia accumulation and transfer over the BBB
- In the brain converted to glutamate and then glutamine
- causing osmotic imbalance and cerebral oedema
Hepatic encephalopathy Westhaven Classification [4]
Ix [3]
- I (confused): irritable, mild confusion, sleep inversion
- II (drowsy): increased disorientation, slurred speech, asterixis
- III (stupor): rousable, incoherent
- IV (coma): unarousable +/- extensor plantars
Ix: MOCA, ammonia (raised), EEG
Hepatic encephalopathy precipitants [4]
constipation haemorrhage
infection, electrolyte imbalance, hypoglycaemia,(hyponatraemia, hypokalaemia)
poisons (alcohol, diuretics, sedatives, anaesthetics)
HCC
Hepatic encephalopathy Mx [3]
Avoid sedation
Lactulose +/- phosphate enema
Rifaximin prophylaxis - reduces small bowel bacteria ammonia production
Portal hypertension pathophysiology [2[
- increased intrahepatic pressure causes increased hepatic portal pressure
- When this exceeds 12mmHg, collateral circulation form between portal and systemic circulation
Portal hypertension features [4]
- Oesophageal and gastric varices: portal long and short gastric veins anastomose with systemic inferior oesophageal veins
- Caput medusae: portal peri-umbilical veins anastomose with superior abdominal wall veins
- Prominent abdominal veins (more common): portal HTN if ABOVE umbilicus (IVC obstruction if below)
- Haemorrhoids: portal superior rectal veins anastomose with systemic middle and inferior rectal veins
Portal hypertension presentation [5]
- varices
- caput medusae
- haemorrhoids
- splenomegaly
- ascites, encephalopathy (NOT a cause of hepatomegaly)
Esophageal and gastric varices causes
Prehepatic
Hepatic [3]
Post hepatic [3]
- Pre-hepatic: portal vein thrombosis
- Hepatic: cirrhosis, schistosomiasis, sarcoidosis
- Post-hepatic: Budd-Chiari, RHF, constrictive pericarditis
Esophageal and gastric varices Pathophys
Px: portal HTN leads to dilated veins at sites of porto-systemic anastomosis (left gastric and inferior oesophageal veins)
Esophageal and gastric varices prevention [2]
o Non-cardio selective beta blocker: PROPRANALOL
o Endoscopic variceal band ligation (EVL): performed as PRIMARY GI BLEED PREVENTION at 2 weekly intervals until all varices eradicated (with PPI cover to prevent EVL induced ulceration)
Esophageal and gastric varices prophylactic or acute refractory management [5]
trans jugular intrahepatic Porto-systemic shunt (TIPSS)
- where IR used to create artificial channel between hepatic vein and portal vein
- to reduce portal pressure; involves using colapinto needle
- to create tract through liver parenchyma
- which is expanded using a balloon and maintained via stent placement
Hereditary haemochromotosis
Ep
Ax [2]
Px [3]
Ep: 40-60y/o
Ax: autosomal recessive mutation in HFE gene on chromosome 6
Px:
- inherited multisystem disorder due to abnormal iron metabolism
- where increased intestinal absorption (increased enterocyte DMT and reduced hepatocyte hepcidin)
- leading to deposition in multiple organs
Hereditary haemochromotosis - which organs can it affect? [6]
- Myocardial: dilated cardiomyopathy, arrythmias
- Endocrine: pancreas (DM), pituitary (hypogonadism causing amenorrhoea and infertility), parathyroid (hypocalcaemia, osteoporosis)
- Arthritis: 2nd and 3rd MCP joints, knees and shoulders
- Liver: chronic liver disease leading to cirrhosis and HCC, hepatomegaly
- Skin: slate grey/bronze discolouration
- Other: erectile dysfunction
Investigations for hereditary hemochromatosis [5]
- Bloods: LFT (ALT>AST), haematinics (increased ferritin and transferrin saturation (>55% in M and >50% in F) and iron and reduced total iron binding capacity)
- XR: chondrocalcinosis
- ECG and echo
- Liver biopsy: pearl stain to quantify Fe and severity
- MRI: estimates iron loading