Hepatitis, Pancreatic, Cancer Diseases (Adults Pt 3) Flashcards
Define Portal Hypertension
Abnormally high blood pressure in the portal venous system primarily caused by resistance to portal blood flow
“Prehepatic” Portal Hypertension
Occurs before it reaches the liver (Ex: Portal vein thrombosis)
“Hepatic” causes of portal hypertension
Occurs inside the liver Ex: Cirrhosis (most common cause)
“Posthepatic” Causes of Portal Hypertension
Occurs btw the liver and the heart (Ex: Inferior vena cava obstruction, RH failure from constrictive pericarditis)
Portal Hypertension Pathophysiology
- Increased vascular resistance
- Hepatic & myofibroblasts are activated
- Nitric oxide vasodilator; more blood flow in portal veins
- Increased portal hypertension
Portal Hypertension Clinical Manifestations
Vomiting blood “hematemesis”
Define Ascites & most common cause
Accumulation of fluid in the peritoneal cavity; Most common cause “Cirrhosis”
Ascites “Overflow theory”
Renal sodium retention is stimulated by portal hypertension; hypervolemia; overflows and weeps into the peritoneal cavity
Ascites “Under fill theory”
Hepatic sinusoidal hydrostatic pressure increases & plasma oncotic pressure decreases. Causes weeping of the lymph fluid from the surface of the liver.
Ascites “Peripheral Arterial Vasodilation theory or Forward Theory”
- Is the synthesis of the overflow & underfill theories
most acceptable theory - Portal hypertension &; Splanchnic vasodilation occurs
- Causes fluid transudation &; lymph formation, producing ascites.
Define Hepatic Encephalopathy
Complex neurological syndrome characterized by impaired behavioral, cognitive, & motor function. Occurs when impaired cerebral function caused by blood borne toxins (ammonia) are not metabolized in the liver.
Clinical Manifestations of Hepatic Encephalopathy
LOC decreases, personality changes, irritability, confusion, flapping tremor (asterxis), stupor (decreased level of consciousness; arousal to pain), coma, death
Jaundice (also called “icterus”)
Yellow or greenish pigmentation of the skin caused by hyperbilirubin
Jaundice Clinical Manifestations
Dark urine, clay colored stools, yellow discoloration, skin xanthomas, anorexia, malaise fatigue.
Define Hepatorenal Syndrome & Major Cinical manifestation
functional renal failure caused by advanced renal disease, particularly cirrhosis with portal hypertension.
GI hemorrhage/Liver failure=hypovolemia=renal failure.
Clinical manifestation: Oliguria
Acute Liver Failure
Severe impairment or necrosis of liver cells without preexisting liver disease or cirrhosis
Pathophysiology Acute Liver Failure
- Hepatocytes become edematous (swollen with fluid)
- Patchy areas of necrosis and inflammatory cell infiltrates disrupt the parenchyma
- Hepatic necrosis is irreversible
Acute Liver Failure: Rene Syndrome vs Wilson’s Disease
Reye Syndrome: ALF in a child with a viral infection (chickenpox) & aspirin use
Wilson: Hereditary copper accumulation
Acute Liver failure Clinical Manifestations
Anorexia, jaundice, abdominal pain
Autoimmune hepatitis
- rare, chronic, & progressive autoimmune inflammatory liver disease .
- T cell mediated
- absence of viral hepatitis
- Clinical manifestation: Amenorrhea
Hepatitis A
- Liver disease caused by Hep A
- Transmitted by fecal oral route
Hep B
- Infectious disease caused by hepatitis B virus (HBV) that affects the liver; can be acute/chronic.
- Parenterally & sexually transmitted
- H.Bacteria
Hep C
- Infectious disease caused by the hep C virus (HCV) that primarily affects the liver
- resp. For posttransfusion hepatitis
- HIV/ drug use
- no vaccine is available
Hep D
Dependent on hepatitis B for replication