Flashcards in Liver Tests Deck (17):
Chug a beer
chug a second beer 15 jumping jacks
You need _ % loss of fx to see liver changes?
2 general types of liver test?
add on tests
part of routine chem panel
What are the two direct tests of liver fx?
Bile acids and Ammonia
How do you test for BA
Dogs/cats must fast for 12 hours, baseline, test 2 hours after eating
Horse/Rmt single measuremt
What are the 2 major pathologic processes that increase BA?
loss of fx hepatocytes/recircualtion issue
decreased excretion of BA
when dont you run BA?
to test fx liver mass if cholestasis is suspected
When is ammonia tolerance test contraindicated?
if ammonia is already high
What causes hyperamonemia?
shunts- tolerance test indicated
urea cycle ez def- rare rare rae
RMT urea toxicosis
MAY SEE Ammonia biurate crystals
What is hepatic encephalopathy?
result of toxic levels of plasma ammonia
most severe after eating
What are the indirect liver tests?
outside ref interval
What is hepatic photosensitivity?
phylloerythrin breakdown from chorophyll, removed by hepatocytes
enters circ, accumualtes in skin
+sun = free radicals leading to inflamm, unpig/hairless skin affected
T/F microcyotis/codocytes can result from decreased heaptic mass
What indicates hepatic lipidosis
What indicates cholangitis, cholangiohepatitis, or extra hepatic biliary dz?
increase in leakage ez
What indicates a shunt?
Ammonia biurate crystalluria
leakage, cholestatic ez/ bilirubinemia WNL