What tests should be performed on a regular basis on patients receiving therapeutic heparin?

a. PT and hematocrit
b. PTT and white count
c. PTT and platelet count
d. Factor assays and platelet count

ANS: C
Patients on heparin must have platelet counts performed daily. A significant drop in the platelet count is a signal for heparin-induced thrombocytopenia. The PTT is also regularly performed to monitor the heparin dosage.