A hospital client is receiving intravenous infusion of heparin for treatment of a pulmonary embolus. Which of the following phenomena is most likely to occur, resulting in the drug's therapeutic effect?
A)
Inhibition of vitamin K synthesis in the liver
B)
Suppression of fibrin formation
C)
Deactivation of the intrinsic clotting pathway
D)
Inhibition of ADP-induced platelet aggregation
Ans:
B
Feedback:
Ultimately, heparin inhibits the clotting factors that mediate the formation of fibrin. It does not inhibit vitamin K synthesis, nor does it deactivate the intrinsic clotting pathway in particular. Heparin does not act on platelet plug formation.
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