portal hypertension portal venous pressure > 5 mmhg collaterals > 10 mmhg bleeding > 12...
TRANSCRIPT
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Portal Hypertension
portal venous pressure > 5 mmHg
collaterals > 10 mmHg
bleeding > 12 mmHg
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Portal Hypertension
intrahepatic - sinusoidal / post-sinusoidal (cirrhosis) pre-sinusoidal (schistosomiasis)
posthepatic - Budd-Chiari syndrome Veno-occlusive disease
prehepatic - portal vein thrombosis cavernous transformation of the portal vein
isolated splenic vein thrombosis left sided portal hypertension (inflammation – tumor)
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Cirrhosis
alcoholviral hepatitis B & Ccholestatic primary biliary cirrhosis
secondary biliary cirrhosis primary sclerosing cholangitis
autoimmune lupoidmetabolic hemochromatosis
Wilson’s alpha 1 – antitrypsin deficiency
cryptogenic
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Cirrhosis
hepatocellular necrosis - fibrosis & nodular regeneration
two major phenomena:
loss of cell mass - hepatocellular failure
increased hepatic vascular resistance -
portal hypertension
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Portal Hypertension
splenomegaly
porto-systemic collaterals - coronary & short gastric veins to azygos vein–
esophageal varices
- recanalized umbilical vein–
caput medusae
- retroperitoneal
- hemorrhoidal venous plexus
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Bleeding
esophageal varices 80%
gastric varices 20%
portal hypertensive gastropathy
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Bleeding
patients with varices – bleeding in 33 - 50%
acute variceal bleeding – mortality 25 - 30%
rebleeding - 70%
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Bleeding
chronic liver disease spider angiomas palmar erythema testicular atrophy
gynecomastia jaundice
ascites splenomegaly
caput medusae asterixis (liver flap)
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Immediate Management
hemodynamic stabilization -PT
- platelets - electrolytes -creatinine
endoscopy - diagnostic - therapeutic
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Pharmacotherapy
splanchnic vasoconstrictors
vasopressin )hypertension, bradycardia, decreased cardiac output,
coronary vasoconstriction (Tx combined with nitroglycerin
glypressin – terlipressin
somatostatin - octreotide
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Endoscopic Treatment
variceal sclerosis – sclerotherapy
variceal ligation – banding
control of bleeding – 85%
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Balloon Tamponade
Sengstaken – Blakemore tube
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Encephalopathy
neomycin–
suppresses urease containing bacteria
lactulose–
acidifies colonic contents
cathartic effect
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Further Treatment
rebleeding – 70% options:
pharmacotherapy – propranolol repeat endoscopic therapy
TIPS porto-systemic shunt operations
devascularization procedures liver transplantation
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Hepatic Functional Reserve
Child’s classification
A B C
albumin (g/dl) > 3.5 3 – 3.5 < 3 bilirubin (mg/dl) < 2 2 – 3 > 3
ascites none mild moderate encephalopathy none minimal markednutritional state excellent good poor
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Hepatic Functional Reserve
Child – Pugh classification
points 1 2 3
albumin (g/dl) > 3.5 2.8 – 3.5 < 2.8
bilirubin (mg/dl) < 2 2 – 3 > 3
PT (sec prolonged) 1 – 4 4 – 6 > 6
ascites none mild moderate
encephalopathy none minimal marked
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Hepatic Functional Reserve
Pugh score 5 – 6 = Child’s A
good hepatic reserve
good operative candidate < 5 % mortality
Pugh score 7 – 9 = Child’s B moderate hepatic reserve
modest operative candidate 10 – 15 % mortality
Pugh score 10 – 15 = Child’s C low hepatic reserve
poor operative candidate > 25 % mortality
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Portosystemic Shunts
effective decompression of portal system
- effective in preventing recurrent bleeding
diversion of portal blood
- accelerated hepatic failure
- encephalopathy
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Portal Blood
cerebral toxins - ammonia
bypass of the liver prevents inactivation
hepatotrophic elements – insulin
diversion causes atrophy
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Surgical Shunts
nonselective (total) end-to-side portocaval shunt (Eck’s fistula)
other nonselective shunts side-to-side meso-caval spleno-renal
selective shunts distal spleno-renal (Warren shunt)
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TIPS
Transjugular Intrahepatic Portosystemic Shunt
major advantage – nonoperative
disadvantage -
nonselective shunt – encephalopathy 30%
shunt stenosis or occlusion at 1 year 50%
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Devascularization Procedures
transection & reanastomosis
- of esophagus = Sugiura procedure
- of stomach = Tanner procedure
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