Haemodialysis 7,500-12,500 IU/dialysis.
IV 5,000-10,000 IU 4 hrly either by bolus inj or continuous infusion in NaCl or dextrose inj.
SC 10,000 IU 8 hrly after initial IV bolus of 5,000 IU.
Low-dose heparin prophylaxis SC 5,000 IU 2-6 hr pre-op & 8-12 hrly post-op for 10-14 days or until patient is mobile.
MI SC 5,000 IU 12 hrly beginning during the 12 hr following the 1st sign of MI.
Open heart surgery <2 hr 120 IU/kg/hr for 10-14 days in peri-op prophylaxis to 6 wk in the treatment of established thrombosis. For operations of longer duration, 1½ times the dose should be given. For each 450 mL of blood used, 2,000 IU are needed.