This approach is based on subcutaneous administration of low-molecular-weight heparin (LMWH) 3 times a day, paired with antifactor Xa (anti-Xa) assay monitoring, 3 times a day, each sample equidistant between two administrations of LMWH. Anticoagulation monitoring is integrated on a regular schedule with additional blood tests, including hemoglobin and hematocrit, platelets count, Fibrinogen, D-dimers, haptoglobin levels, and with full coagulation tests and point-of-care viscoelastic testing on an as needed basis.