In intermittent IV heparin therapy, the blood for the activated partial thromboplastin time (aPTT) should be drawn at which time?
a. 1 hour before the next dose
b. 2 hours after the last dose
c. 30 minutes before the next dose
d. 2 hours before the next dose
ANS: C
If intermittent IV heparin therapy is being given, blood for determination of aPTT should be drawn 30 minutes before the next dose is given.
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