APTT is the time to activate partial thromboplastin; Mainly to detect whether there is a lack of endogenous coagulation factors in the blood of the body.

T T is the plasma thrombin time; Refers to the time required for plasma fibrinogen to be converted into fibrin after "standard" thrombin is added to plasma.

PT is the plasma prothrombin time; The function of exogenous coagulation system can be reflected by detecting PT.

Extended data

The prolonged APTT time is mainly seen in hemophilia, DIC, liver disease and massive transfusion of stored blood. APTT shortening is mainly seen in DIC, prethrombotic state and thrombotic diseases; APTT can be used as a monitoring index of heparin therapy.

T-T prolongation can be seen in low or no fibrinogen, abnormal fibrinogen, DIC and heparin and heparin-like substances in blood.

Prolongation of PT is mainly seen in the decrease of congenital coagulation factors Ⅱ, ⅴ, ⅶ and ⅹ, and the deficiency of fibrinogen and acquired coagulation factors. PT shortening is mainly seen in congenital coagulation factor V elevation, early DIC, thrombotic diseases, oral contraceptives and so on. Monitoring PT can be used as a clinical monitoring index of oral anticoagulants.

These items belong to the measurement of coagulation function, which can know whether the patient has abnormal coagulation function before operation, effectively prevent unexpected situations such as bleeding during and after operation, and thus obtain the best surgical effect.

References:

Coagulation function _ Baidu Encyclopedia?