Which lab measures are categorized under coagulation?

Coagulation measures are essential in assessing the blood's ability to clot properly and include several specific tests that evaluate different pathways of the coagulation cascade. The International Normalized Ratio (INR), Prothrombin Time (PT), and Activated Partial Thromboplastin Time (aPTT) are all tests that measure specific aspects of coagulation.

INR is commonly used to monitor patients on anticoagulation therapy, specifically with vitamin K antagonists such as warfarin, reflecting the extrinsic pathway of coagulation. PT also assesses the extrinsic pathway and is often reported alongside INR. aPTT evaluates the intrinsic pathway of coagulation, determining how well and how quickly the blood clots.

These tests are crucial for diagnosing bleeding disorders, monitoring patients on anticoagulation therapy, and guiding treatment decisions in clinical settings, emphasizing their categorization under coagulation measures. In contrast, the other choices include lab measures related to different physiological processes that do not pertain to coagulation.