EQ GI Flashcards

1
Q

Which liver enzymes are hepatocellular?

A

ALT, AST, LDH, SDH, GLDH

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2
Q

Which hepatocellular enzymes are liver specific?

A

SDH GLSH

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3
Q

Which hepatocellular enzymes are NOT liver specific (what else might cause them)?

A

ALT, AST, LDH, muscular damage

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4
Q

Which liver enzymes are cholestatic?

A

ALP, GGT

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5
Q

Describe the different types of ALP.

A

L-ALP (liver), B-ALP (bone), C-ALP (corticosteroid induced), I-ALP (lost in GIT

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6
Q

Why might a dog on steroids have an increased ALP value?

A

Increased C-ALP

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7
Q

What are the markers of liver function?

A

Bile acids, cholesterol, bilirubin (albumin - non-specific)

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8
Q

What can cause pre-hepatic hyperbilirubinaemia? What type of bilirubin measured this?

A

Haemolysis - unconjugated

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9
Q

What can cause hepatic hyperbilirubinaemia? What type of bilirubin measured this?

A

Hepatitis (hepatocyte dysfunction) - conjugated initially and then unconjugated

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10
Q

What can cause post-hepatic hyperbilirubinaemia? What type of bilirubin measured this?

A

Extra-hepatic obstruction - conjugated

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11
Q

What is the predominating clinical signs of hyperbilirubinaemia?

A

Jaundice - delta-bilirubin

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12
Q

What biochemical substances would be used to measure liver cell function?

A

Bilirubin and bile acids. NH3, urea, immunoglobulins, albumin

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13
Q

What liver abnormalities may be suggested with a reduction or increase in glucose?

A

Increase - decreased portal absorption, decreased - reduced glycogen stores

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14
Q

Why might serum albumin be decreased whilst immunogloblins are severely increased?

A

Liver is busy making immunoglobulins rather than albumin

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15
Q

What type of liver disease may cause microcytosis?

A

PSS

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16
Q

What type of liver disease may cause ovalocytosis?

A

Hepatic lipidosis

17
Q

Why is a BAST more sensitive that a random BA serum test?

A

Feeding stimulates gall bladder contraction which releases bile acids into the intestine and portal circulation (after intestinal absorption). This increases the load of bile acids that must be extracted from blood by the liver and increases the sensitivity of the procedure to hepatobiliary or vascular defects.

18
Q

Why can a BAST not be used in the horse?

A

They don’t have a gall bladder