1. General treatment: 120U/kg each time, 2 times a day.

　　2. Prevention of postoperative DVT formation :(1) diheparin sodium 2500U was given 1 ~ 2 hours before surgery, and the dose was the same once a day for 5 ~ 10 days. (2) enoxaparin sodium 30mg was used 12 ~ 24h after surgery, once a day for 7 ~ 10 days.

　　3. Prevent the formation of blood clot during hemodialysis: give the drug at the beginning of hemodialysis, for those weighing less than 50kg, 0.3ml each time; Weight between 50 and 69kg, 0.4ml each time; Weight equal to or greater than 70kg, 0.6ml each time.

　　4. Prevention of thromboembolic disease: general prevention, once a day, 0.3ml each time, usually lasting at least 7 days, in all cases, preventive medication should be taken throughout the risk period until the patient may be active. The first dose should be given 2 ~ 4h before surgery. Orthopedics: the first dose should be given 12h before and 12h after surgery. Once a day thereafter, for a total of at least 10 days. In all cases, prophylactic medication should be administered throughout the risk period until the patient is mobile.

　　5. Treatment for thromboembolic disease: subcutaneous injection, 2 times a day (1 time every 12 hours), usually lasting 5-7 days, dose can be adjusted according to body weight.

　　6. Prevent blood clots in extracorporeal circulation during dialysis: intravenous injection of heparin sodium 30 ~ 40U/kg; The infusion was then performed at 15U/h. For patients with less than 4h dialysis, a single dose of 5000u was given. If there are bleeding complications or renal insufficiency, the dose should be reduced. These patients may receive intravenous injections of 5 to 10U/kg, followed by iv injections of 4 to 5 u /kg per hour.

　　7. For the treatment of unstable angina pectoris, intravenous injection of 120U/kg was given every 12 hours, with the maximum recommended dose of 10000u every 12 hours. Use aspirin for 5 to 8 days.