Author Question: Which of the following foods should not be eaten by a patient who is receiving warfarin (Coumadin) ... (Read 72 times)

rosent76 · **on:** Jul 23, 2018

Which of the following foods should not be eaten by a patient who is receiving warfarin (Coumadin) therapy?

a. Red meat
b. Citrus fruits
c. Green leafy vegetables
d. Milk and milk products

Question 2

A health care provider is getting an informed consent to start a patient on intravenous heparin therapy. Which of the following statements is most accurate regarding the action of heparin?

a. Heparin inactivates clotting factors that are currently circulating in the blood-stream.
b. Heparin dilates the arterial lumen so blood can flow around a site of injury.
c. Heparin prevents clots from forming by making blood vessel walls slippery.
d. Heparin interferes with production of vitamin K-dependent clotting factors in the liver.

momo1250 · **Reply #1 on:** Jul 23, 2018

Answer to Question 1

ANS: C
Alterations in vitamin K levels alter the effects of warfarin. A diet high in green leafy vegetables reduces the effectiveness of warfarin.

Answer to Question 2

ANS: A
Unfractionated heparin (UFH) is comprised of long-chain molecules that form tertiary complexes with antithrombin III, allowing for inactivation of IIa (thrombin) as well as factors Xa and XIa. In low dosages, UFH prevents the conversion of prothrombin to thrombin by its effects on factor Xa. In higher doses, UFH neutralizes thrombin, thus preventing the conversion of fibrinogen to fibrin.