Which test value is expressed in minutes rather than seconds or a ratio?

Which test value is expressed in minutes rather than seconds or a ratio?

• A. Prothrombin Time
• B. Bleeding Time
• C. Partial Thromboplastin Time
• D. International Normalized Ratio

Answer: (B)

Bleeding Time is the test value expressed in minutes. It measures how long bleeding lasts after a standardized skin puncture, so the result is naturally recorded in minutes. Prothrombin Time and Partial Thromboplastin Time are reported in seconds because they indicate the actual time to clot formation through the extrinsic and intrinsic pathways, respectively. The International Normalized Ratio is a calculated ratio (a dimensionless value) used to standardize PT results across laboratories. Therefore, the one measured in minutes is Bleeding Time.

Bleeding Time is the test value expressed in minutes. It measures how long bleeding lasts after a standardized skin puncture, so the result is naturally recorded in minutes. Prothrombin Time and Partial Thromboplastin Time are reported in seconds because they indicate the actual time to clot formation through the extrinsic and intrinsic pathways, respectively. The International Normalized Ratio is a calculated ratio (a dimensionless value) used to standardize PT results across laboratories. Therefore, the one measured in minutes is Bleeding Time.