Blood Test Clinical Significance Chart Page 7
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28ASO, TITER (CON’T)
infection that may not have
been diagnosed, this test
could be helpful. In
addition, it may be used to
help diagnose rheumatic
fever, which occurs weeks
after a strep throat infection
when the throat culture
would no longer be
positive.
BUN
Serum urea nitrogen (BUN)
8-24 mg/dL
is INCREASED in acute
and chronic intrinsic renal
disease, in state
characterized by decreased
effective circulating blood
volume with decreased
renal perfusion, in postrenal
obstruction of urine flow
and in high protein intake
states.
DECREASED serum urea
nitrogen (BUN) is seen in
high carbohydrate/low
protein diets, states
characterized by increased
anabolic demand (late
pregnancy, infancy,
acromegaly), malabsorption
states and severe liver
damage.
TOTAL BILIRUBIN
Serum total bilirubin is
TBIL: 0.0-1.2 mg/dL
DIRECT BILIRUBIN
INCREASED in
DBIL: 0.0-0.2 mg/dL
INDIRECT BILIRUBIN
hepatocellular damage
IBIL: 0.0-1.1 mg/dL
(infectious hepatitis,
alcoholic and other toxic
hepatopathy, neoplasms),
intra- and extrahepatic
biliary hemolysis,
physiologic neonatal
jaundice, Crigler-Najjar
syndrome, Gilbert’s
disease, Dubin-Johnson
syndrome, and fructose
intolerance.
Disproportionate
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