Heparin sodium can interfere with many aspects of the blood coagulation process and has anticoagulant effects in vivo and in vitro. Therefore, heparin sodium can be used for surgical prevention of thrombosis and anticoagulant treatment of pregnancy, for patients with acute myocardial infarction, heparin can be used to prevent venous embolism, and can prevent large anterior wall transmural myocardial infarction patients with arterial embolism.

　　Indications for heparin sodium:

　　1. Prevent thrombosis and embolism, such as deep venous thrombosis, myocardial infarction, pulmonary embolism, thrombophlebitis and postoperative thrombosis, etc.

　　2. Treatment of DIC caused by various causes, such as bacterial sepsis, early placental dissection, and lysis of malignant tumor cells, except for DIC caused by snake bite. Early application prevents the depletion of fibrinogen and other clotting factors.

　　3. Other anticoagulants in vivo and in vitro, such as cardiac catheterization, cardiopulmonary bypass, hemodialysis, etc.