What Is the Best Method to Prevent Warfarin-Induced Skin Necrosis

question 4

Multiple Choice

What is the best method to prevent warfarin-induced skin necrosis during treatment for thrombosis?

• A)Use higher dose of warfarin early in treatment.
• B)Give the patient injections of protein C.
• C)Stop warfarin at the first sign of necrosis.
• D)Use heparin for first 5 days in conjunction with warfarin.

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Definitions:

Addition Law

A probability law used to compute the probability of the union of two events. It is P(A ∙ B) = P(A) + P(B) − P(A ∩ B). For mutually exclusive events, P(A ∩ B) = 0; in this case the addition law reduces to P(A ∙ B) = P(A) + P(B).

Probability

The evaluation of how likely it is for an event to happen.

Independent Events

Two or more events where the occurrence of one does not affect the probability of the others occurring.

Conditional Probability

The probability of an event given that another event already occurred. The conditional probability of A given B is P(A ∣ B) = P(A ∩ B)/P(B).