['deep-venous thrombosis', 'pulmonary embolism', 'venous thromboembolism']
['real time heparin dose adjustment', 'standard heparin dose']

        Inclusion Criteria:

          -  Patients undergoing surgical procedures

          -  Initiation of a heparin infusion at a rate of 500 units/hour intraoperatively or
             postoperatively

        Exclusion Criteria:

          -  Age <18 years old

          -  Pregnant

          -  Incarcerated

          -  Mentally disabled
      