Which test is used to assess platelet function in a clinical setting?

Which test is used to assess platelet function in a clinical setting?

• A. Buccal mucosa bleeding time
• B. Prothrombin time
• C. Partial thromboplastin time
• D. Fibrinogen

Answer: (A)

Assessing platelet function focuses on how well platelets form a plug during the first phase of hemostasis. The buccal mucosa bleeding time does this by creating a standardized mucosal injury and measuring the time until bleeding stops; a longer time points to impaired platelet function, platelet count issues, von Willebrand disease, or antiplatelet drug effects. The other tests target the coagulation cascade rather than platelets: prothrombin time evaluates the extrinsic pathway, partial thromboplastin time evaluates the intrinsic pathway, and fibrinogen tests assess a clotting factor involved in later fibrin formation rather than the initial platelet plug.

Assessing platelet function focuses on how well platelets form a plug during the first phase of hemostasis. The buccal mucosa bleeding time does this by creating a standardized mucosal injury and measuring the time until bleeding stops; a longer time points to impaired platelet function, platelet count issues, von Willebrand disease, or antiplatelet drug effects. The other tests target the coagulation cascade rather than platelets: prothrombin time evaluates the extrinsic pathway, partial thromboplastin time evaluates the intrinsic pathway, and fibrinogen tests assess a clotting factor involved in later fibrin formation rather than the initial platelet plug.