Using Intravenous Heparin Versus Standard of Care Subcutaneous Heparin to Prevent Clots After Surgery

The LDIVH (experimental) group will receive a continuous heparin drip titrated to a prothrombin time (PTT) of 40-45. LDIVH subjects will have PTT tested within 24 hours prior to initiation of LDIVH. In addition, these subjects would continue to have a PTT tested every 6 hours until the PTT value falls between 40-45. All LDIVH subjects will have PTT values measured at least daily. This will continue until ICU discharge or a maximum of 28 days.

5000 units given subcutaneously three times a day until ICU discharge or a maximum of 28 days