An outpatient has an INR of 6.5. This patient's previous test at the same facility had results in the therapeutic range of 2-3 on long-term anticoagulant therapy. The appropriate next step for the laboratory professional would be to:
a. Retest the patient sample
b. Recollect the specimen
c. Report the result
d. Notify the hematology supervisor
Question 2
What preanalytical quality control procedures are necessary when performing platelet aggregation studies?
a. Assess patient medications before obtaining specimen
b. Obtain specimen after a 12-hour fast
c. Perform a bleeding time before testing
d. Collect the specimen in a glass tube
Graphic display of hypothetical results of a predator removal experiment.
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