INSTITUTE FOR ALGORITHMIC MEDICINE

Risk Score of Landefeld et al for Anticoagulant-related Major Bleeding in Hospitalized Patients.

Purpose: To predict the risk for anticoagulant-related major bleeding in hospitalized patients by looking at four risk factors.

Age of patient  years   Is the patient receiving intravenous heparin therapy? Yes No Does the patient have an acute myocardial infarction? Yes No   Does the patient have cancer? Yes No   Blood pressure at admission  mm Hg Did hypotension occur during hospitalization? Yes No Was an intra-aortic balloon pump required? Yes No Total serum bilirubin at start of anticoagulation therapy mg/dL µmol/L   Maximum total serum bilirubin after initiation of anticoagulation therapy  mg/dL   Is there a hemolytic anemia or other nonhepatic explanation for the bilirubin rise? Yes No Serum creatinine mg/dL µmol/L   Hematocrit  percent Mean red blood cell volume  femtoliters Maximum prothrombin time for patient  seconds Upper limit of reference range for prothrombin time  seconds Maximum activated partial thromboplastin time for patient  seconds Upper limit of reference range for aPTT  seconds