Regarding Laboratory Testing to Detect Known Causes of Thrombosis

question 35

Multiple Choice

Regarding laboratory testing to detect known causes of thrombosis:

• A) Testing is best performed as soon as possible after the thrombosis is diagnosed, but before the patient receives anticoagulants.
• B) It is best to test using plasma drawn after the patient has begun anticoagulant therapy, so the effects of the thrombus are masked.
• C) Testing during the acute thrombotic event can result in false positives and false negatives
• D) Genetically based tests, such as those for MTHFR, prothrombin G20210A, and factor V Leiden, are affected by anticoagulant therapy and the presence of thrombus.
• E) It is acceptable to test for inherited causes of thrombophilia during the acute event, but not for acquired causes.

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