HPB Flashcards
What are the four types of liver functions?
endocrine, exocrine, digestive, and hematologic
What is the largest internal organ?
liver
What are the 4 types of tissue found in the liver?
hepatocytes, Kupffer cells, Spaces of Disse, & endothelial cells, Pit cells, Stellate cells
How does the liver function in a digestive sense?
creation of bile salt, vitamin/mineral storage and processing, process and store CHO, fats, and proteins (albumin)
What is the endocrine function of the liver?
metabolism of glucocorticoids, mineralcorticoids, and sex hormones
What is the exocrine function of the liver?
Excretion of bile pigment
Excretion of cholesterol via bile
Synthesis of urea
Detoxification of drugs & foreign substance
What is the hematologic function of the liver?
Storage of blood
Removal of Bilirubin
Hematopoiesis
Synthesis of clotting factors
What are the two inputs of the liver and what percentage of blood goes to each of these vessels?
Hepatic artery (25% of oxygenated blood supply) and the portal vein (75% of oxygenated blood supply)
What does the portal vein do?
carries nutrients from stomach, pancreas, sm&large intestine, spleen, major nutrient & blood supply, 1st pass effect of oral medications
What effect does the portal vein cause for medications?
first pass effect
How many outputs does the liver have? What is the vessel?
1 output, the hepatic vein
What percentage of the liver needs to be viable for it to regenerate?
25%
What is the portal triad?
bile duct, portal vein, and hepatic artery
What are the parts of a hepatic lobule?
portal trial, sinusoids, central vein (hepatic vein), hepatocyte, and kupffer cell
What labs should be done to assess liver function?
LFT, coags, ammonia, cardiac/renal function tests
What labs are done in a liver function test?
total protein, albumin, AST, ALT, Alk Phos, Bilirubin, Ammonia, and GGT
If AST/ALT ratio is greater than 1, what is that indicative of?
cirrhosis
Is AST/ALT ratio is less than 1, what is that indicative of?
hepatitis
Which levels would be high and which levels would be low in liver failure?
total protein and albumin low
ALT/AST/Alk phos./bilirubin/ammonia high
How is bilirubin produced?
RBC breakdown into heme into unconjugated bilirubin and then into the liver for processing
What does the liver do to bilirubin?
Conjugates the bilirubin
What are the two routes that bilirubin can take once processed in the liver?
excreted with feces or reabsorbed into the portal system
What kind of bilirubin can the renal system excrete?
conjugated
How is Hepatitis A treated?
it is self-limiting
How is hepatitis C commonly trasmitted?
IV drug users, high-risk behavior, healthcare. It has a 15-20 year delay
How long does the prodromal phase of acute hepatitis last?
until jaundice shows up
What are the signs of the icteric phase of acute hepatitis?
jaundice develops and lasts up to 6 weeks
What happens during the post-icteric phase of acute hepatitis?
jaundice will begin to resolve and this happens 6-8 weeks post exposure
If acute hepatitis is not resolved within __ months, it is considered chronic hepatitis
6
What strains of hepatitis is there a vaccine for?
Hepatitis A and B
What are the keys to symptom management for hepatitis?
rest, nutrition, fluids, medication