A patient with a history of easy bruising and prolonged bleeding after trauma is diagnosed with a coagulation disorder. Which of the following tests would be most useful in diagnosing the underlying cause of this patient's condition?
Explanation
The partial thromboplastin time (PTT) is a test used to evaluate the intrinsic and common coagulation pathways, and an abnormal result can indicate a deficiency or dysfunction of one or more coagulation factors.
Source
Williams Hematology