Which of the following laboratory tests is used to evaluate the function of the intrinsic pathway of coagulation?

A Prothrombin time (PT)
B Partial thromboplastin time (PTT) ✓
C Thrombin time (TT)
D Fibrinogen assay

Explanation

The partial thromboplastin time (PTT) is a laboratory test used to evaluate the function of the intrinsic pathway of coagulation, which involves factors XII, XI, IX, and VIII.

Source

Clinical Hematology, 1st edition
Hematology Hematology: Coagulation Disorders Hematology: Coagulation Disorders Medium MEDICAL Confidence: high