Case Study Three, continuedInitial aPTTImmediate aPTT mixing studyIncubated aPTT mixing study63 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?

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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