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The page below is a sample from the LabCE course Detecting and Evaluating Coagulation Inhibitors and Factor Deficiencies. Access the complete course and earn ASCLS P.A.C.E.-approved continuing education credits by subscribing online.

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Case Study Three, continued

Initial aPTT

Immediate aPTT mixing study

Incubated aPTT mixing study

63 sec. (normal range 21-34 seconds)

26 sec.

65 sec.

Has the aPTT been corrected by the mix? Is a factor deficiency or a coagulation inhibitor the more likely cause of the patient's prolonged aPTT?

Please select the single best answer