Heparin sodium is mainly used for hemodialysis or hemofiltration to prevent 
blood clotting and prevent thrombosis during extracorporeal circulation. The 
drug is mainly used in hemodialysis for the prevention of blood clotting and the 
treatment of deep vein thrombosis, unstable angina, and the prevention of 
operation-related thrombosis.
  Needs to be individualized dosage, in terms of dosage of the drug in the 
application process may produce adverse reaction, can lead to bleeding, 
especially large dose application that may lead to subcutaneous hematoma, may 
also cause thrombocytopenia, skin necrosis, allergic reactions, rare is likely 
to trigger transaminase lifts.
  The drug also has contraindications during application. Patients with acute 
gastroduodenal ulcer, cerebral hemorrhage, severe coagulation disease, and 
septic endocarditis are prohibited to use. Thrombocytopenia in patients with 
positive in vitro platelet aggregation test is contraindicated in patients with 
central nervous system ocular or ear injury or surgical administration of 
heparin. In the treatment of acute pulmonary thrombosis, local anesthetic drugs 
should be used with caution.