Calc Function

    • Calcs that help predict probability of a diseaseDiagnosis
    • Subcategory of 'Diagnosis' designed to be very sensitiveRule Out
    • Disease is diagnosed: prognosticate to guide treatmentPrognosis
    • Numerical inputs and outputsFormula
    • Med treatment and moreTreatment
    • Suggested protocolsAlgorithm





    Chief Complaint


    Organ System


    Patent Pending

    ABC Score for Massive Transfusion

    Predicts need for massive transfusion in trauma patients.
    When to Use
    Why Use

    Determining when to initiate massive transfusion protocols on trauma patients; because the ABC (Assessment of Blood Consumption) Score only uses clinical and bedside criteria, a decision can be made about massive transfusion rapidly in trauma patients.

    Providers may wait too long to being massive transfusion and increase a patient's morbidity and mortality by not transfusing early enough, or may increase morbidity and mortality by transfusing blood products unnecessarily.


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    Next Steps
    Creator Insights


    • Massive transfusion protocols are institution-specific, but often are 1:1:1 or 1:1:2 for fresh frozen plasma, platelets, and packed red blood cells (JAMA, 2015).
    • Remember, the ABC Score does not indicate if trauma patients should receive blood, only if they should receive blood through a massive transfusion protocol.
    Dr. Bryan Cotton

    About the Creator

    Bryan Cotton, MD, is an associate professor in the department of surgery, division of acute care surgery at the University of Texas Health Center in Houston. He is an active researcher in the field of trauma and traumatic injury.

    To view Dr. Bryan Cotton's publications, visit PubMed

    About the Creator
    Dr. Bryan Cotton