GI exam #3 Flashcards
What are the 5 major functions of the liver?
- Metabolism
- Bile Synthesis
- Storage
- Mononuclear Phagocyte System
- Production of coagulation factors
What are the 3 metabolic functions of the liver?
- Carbohydrate, fat & protein metabolism
- Detoxification
- Steroid metabolism
What is jaundice?
yellow pigmentation of the skin, sclera & deeper tissues, results from abnormally high levels of bilirubin circulating in the blood.
How is bilirubin formed?
From breakdown of hemoglobin of old RBC’s
Which kind of bilirubin is not water soluble?
Unconjugated bilirubin (bound to albumin)
Where does bilirubin become conjugated?
in the liver, by attaching to glucuronic acid. Now it is water soluble
Liver secretes conjugated bilirubin into ____
bile, where it travels to the lg intestine
How is bilirubin excreted from the body?
It is converted into bilinogen in large intestines & excreted in urine & feces.
What are the 2 most common causes of jaundice?
excessive destruction of RBC’s OR bile excretion obstruction.
What are the 3 types of jaundice?
- Hemolytic (pre-hepatic)
- Hepatocellular (within the liver)
- Obstructive (most common)
What causes Hemolytic Jaundice?
excessive RBC destruction. leads to excess unconjugated bilirubin in the blood, liver is unable to handle increased load.
What causes hepatocellular jaundice?
defective conjugation or excretion within the liver. Hepatocytes are damaged & leak bilirubin, increasing conjugated bilirubin levels.
What causes Obstructive Jaundice?
decreased or obstructed flow of bile thru liver or biliary duct system
2 Types of obstructive jaundice?
- intrahepatic- outward flow of bile blocked
2. extrahepatic- flow of bile into duodenum blocked
What do stools look like with complete obstruction of bile flow?
clay colored
Clinical manifestations of jaundice:
yellowish discoloration, pruritis,, bruising & bleeding of skin, brown foamy urine, H/A & confusion (if unconjugated bilirubin crosses blood-brain barrier & irritates the brain)
What is hepatitis?
any type of inflammation of the liver
Types of viral hepatitis?
Hep A, Hep B, Hep C, Hep D, Hep E, Hep G
How is Hep A transmitted?
fecal-oral route
How can you get immunity from Hep A?
Hepatitis A vaccine or after infection develop IgG antibodies = lifelong immunity
Hepatitis B: RNA or DNA virus?
DNA
How is Hep B transmitted?
blood & body fluids
Can Hepatitis B live on a dry surface?
Yes! for up to 7 days
What is the HBV window phase?
3 month period where serological markers for hep b are negative but pt is infectious
What is a chronic carrier?
someone who no longer has symptoms but remains contagious. high risk of developing cirrohosis and liver cancer
How can you get immunity from Hep B?
vaccine or past HBV infection
How is Hep C transmitted?
Blood to blood
What is the leading indication for liver transplant?
Hepatitis C
Hepatisis D can not survive on its own. What co-infection does it require to survive?
Hepatitis B
How is hepatitis E transmitted?
fecal-oral. usually self-limiting & resolves on its own
How do you acquire non-viral hepatitis?
liver damage after exposure to hepatotoxins
How do you diagnose Hepatitis?
Liver biopsy, elevated serum ALT & AST, elevated total serum bilirubin levels, elevated ALP, elevated WBC’s
What are the phases of acute Hepatitis and how long do they last?
preicteric phase: 1-21 days
icteric phase (jaundice phase): 2-4 weeks
post icteric phase: weeks to months
What does icteric mean?
jaundice
What are symptoms of preicteric hepatitis?
splenomegaly, hepatomegaly, lymphadenopathy, fatigue, constipation/diarrhea, H/A, low-grade fever, RUQ pain
What are symptoms of icteric phase of hepatitis?
jaundice, dark urine, clay colored stools, GI symptoms, pruritis, increased indirect & direct serum bilirubin, increased stool bilirubin
Symptoms of post icteric phase of hepatits?
begins when jaundice disappears, malaise, fatigue, indigestion, flatulence, abd pain, hepatomegaly
What is anicteric Hepatitis?
viral hepatitis w o the presence of jaundice
Hepatitis C clinical manifestations:
majority asymptomatic! leads to chronic liver disease
What is the primary nursing intervention for acute hepatitis?
rest & adequate nutrition