Partial thromboplastin time

The blood coagulation mechanism is divided into internal and external coagulation systems. Endogenous coagulation systems include factors Ⅻ, Ⅺ, Ⅸ, Ⅷ, Ⅹ, Ⅹ, Ⅴ, thrombinogen and fibrinogen, etc., which can be measured by activated partial thromboplastin time (APTT). For screening tests.

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