الفهرس 
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Abstract
Normal pregnancy may be associated with lower mean
platelet count than non-pregnant whereas preeclampsia is
associated with platelet dysfunction independent of platelet
number. The platelet function analyzer (PFA-100) is a bedside test
of coagulation designed to evaluate plateletfunction. It measures
the time required for whole blood to occlude a membrane
impregnated with either epinephrine (EPI) or adenosine
50diphosphate (ADP). The results are reported as closure time
(CT-EPI or CT-ADP) in seconds. This device could potentially be
used to assess primary hemostasis prior to regional anesthesia.
Keywords:
Pregnancy, preeclampsia, regional anesthesia , platelet
functions , PFA-100, closure time.