Blood Test Clinical Significance Chart Page 23
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28ESR (SEDIMENTATION RATE)
When your doctor thinks
(CON’T)
that you might have a
condition that causes
inflammation and to help
diagnose and follow the
course of
temporal arteritis
or
polymyalgia rheumatica
PROTHROMBIN TIME (PT)
Why get tested?
With anticoagulant:
PROTHROMBIN TIME IS GOOD
To check how well blood-
<45 sec
FOR 24 HOURS REFRIGERATED.
thinning medications
(anti-
Without anticoagulant:
coagulants) are working to
10.5-13.8 sec
TUBE MUST BE FILLED
prevent blood clots; to help
COMPLETELY.
detect and diagnose a
bleeding disorder
When to get tested?
If you are taking an anti-
coagulant drug or if your
doctor suspects that you
may have a bleeding
disorder
PARTIAL THROMBOPLASTIN TIME
Why get tested?
22.0-37.0 sec
(PTT)
As part of an investigation
PTT MUST BE RUN WITHIN 4
of a bleeding or thrombotic
HOURS.
episode. To help evaluate
your risk of excessive
bleeding prior to a surgical
TUBE MUST BE FILLED
procedure. To monitor
COMPLETELY.
heparin anticoagulant
therapy.
When to get tested?
When you have
unexplained bleeding or
blood clotting. When you
are on heparin
anticoagulant therapy.
Sometimes as part of a pre-
surgical screen.
WHITE BLOOD CELL COUNT
Why get tested?
3.5-11.0 THO/MM3
(WBC)
If your doctor thinks that
you might have an infection
or
allergy
and to monitor
treatment
When to get tested?
As part of a
complete blood
count
(CBC), which may be
ordered for a variety of
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