Author Question: A hospital client is receiving intravenous infusion of heparin for treatment of a pulmonary embolus. ... (Read 140 times)

magmichele12 · **on:** Jun 25, 2018

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

Question 2

During science class, a student asks, What's the difference between plasma and serum in the blood? The nurse responds that the primary difference between plasma and serum is that plasma contains

A)
fibrinogen.
B)
heparin.
C)
white blood cells.
D)
hydrogen ions.

phuda · **Reply #1 on:** Jun 25, 2018

Answer to Question 1

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.

Answer to Question 2

Ans:
A

Feedback:

The major difference between plasma and serum is the presence of fibrinogen in the plasma from an anticoagulated centrifuged whole-blood specimen. When blood is removed from the body for testing, it clots within 30 to 60 minutes. The clot contains the blood's cellular components enmeshed in an insoluble fibrin network (formed by the polymerization of soluble plasma protein fibrinogen). The remaining fluid portion is the yellow liquid serum. This serum no longer contains fibrinogen because the fibrinogen originally present in uncoagulated blood was used up in the formation of the blood clot. Heparin, WBC, and hydrogen ions are incorrect.