Heparin sodium can interfere with many parts of the blood clotting process and has anticoagulant effects both in vivo and in vitro. Clinical indications of heparin sodium mainly include the following aspects:

　　1, prevent the formation and embolism of thrombosis, such as deep vein thrombosis, myocardial infarction, pulmonary embolism, thrombophlebitis and postoperative thrombosis.

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

　　3. Other anticoagulation in vivo and in vitro, such as cardiac catheterization, cardiac surgery, extracorporeal circulation, hemodialysis, etc. The above aspects to consider the use of heparin sodium for treatment, drugs must be in the outpatient doctor's doctor's orders for symptomatic treatment.