A child is on IV heparin. Which laboratory value does the nurse analyze to determine if the dose is therapeutic?
A.
Platelet count
B.
PT
C.
PTT
D.
Red blood cell count
ANS: C
The PTT (or sometimes factor anti-Xa) is used to monitor heparin therapy for therapeutic benefit. The platelet count is also monitored to detect thrombocytopenia, a side effect of heparin. The PT is used to monitor warfarin (Coumadin) therapy. The RBC count is not used to determine anticoagulation benefit.
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