Flashcards in GI Lab Assessment Deck (19):
1
T/F LFTs may be normal in patient’s who have advanced liver disease
true
2
T/F Abnormal LFTs are only caused by diseases related to the liver
false, can be caused by diseases unrelated to the liver
3
Name the serum aminotransferases that are released into circulation when hepatocytes are injured
Alanine aminotransferase (ALT). Aspartate aminotranferase (AST)
4
Refers to a group of enzymes that catalyze the hydrolysis of organic phosphates. Elevation reflects obstruction to the liver
alkaline phosphatase
5
Produced by heme metabolism
bilirubin
6
relates to only hepatobiliary disease but does not differentiate it obstructive from hepatocellular damage
conjugated bilirubin
7
occurs when conjugated (direct) bilirubin levels are high
bilirubinuria
8
adheres tightly to albumin and does not get filtered by the kidneys
unconjugated bilirubin
9
Becomes elevated in hepatic encephalopathy
ammonia
10
Most accurate method of drawing ammonia level
get an arterial sample
11
What does clay colored stool indicate?
biliary obstruction
12
What does black colored stool indicate?
blood in stool
13
If stool has a tarry color, how much blood is likely to be in the upper GI tract?
> 100mL
14
Sometimes found in stool with parasitic infections (esp amebiasis)
Charcot-Leyden crystals
15
Most common cause of infectious diarrhea
viruses
16
Treatment for C. difficle colitis
metronidazole (Flagyl). 2nd line- ORAL vancomycin
17
2-3 X normal is abnormal and indicates pancreatic problem such as pancreatitis, trauma, tumor, common bile duct stones, penetrating PU
amylase
18
Decreased in marked destruction of pancreas or severe liver damage
amylase
19