What does PTT stand for?

What does PTT stand for?

• A. Partial prothrombin time
• B. Partial thromboplastin time
• C. Prothrombin time
• D. Activated partial thromboplastin time

Answer: (A)

Recognize common coagulation test abbreviations. PTT stands for partial thromboplastin time, which measures how long it takes blood to clot via the intrinsic pathway using a partial thromboplastin reagent. The activated version of this test is called activated partial thromboplastin time (aPTT), used when an activator is added, often for heparin monitoring. Prothrombin time is a different test, abbreviated PT, that assesses the extrinsic pathway. Therefore, the correct expansion for PTT is partial thromboplstin time. The option partial prothrombin time isn’t a standard lab term, since it combines elements from PT and PTT and isn’t used in practice.

Recognize common coagulation test abbreviations. PTT stands for partial thromboplastin time, which measures how long it takes blood to clot via the intrinsic pathway using a partial thromboplastin reagent. The activated version of this test is called activated partial thromboplastin time (aPTT), used when an activator is added, often for heparin monitoring. Prothrombin time is a different test, abbreviated PT, that assesses the extrinsic pathway. Therefore, the correct expansion for PTT is partial thromboplstin time. The option partial prothrombin time isn’t a standard lab term, since it combines elements from PT and PTT and isn’t used in practice.