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      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
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    • Suggested protocolsAlgorithm

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    Patent Pending

    McMahon Score for Rhabdomyolysis

    Predicts mortality or acute kidney injury (AKI) in rhabdomyolysis patients.

    INSTRUCTIONS

    Use in patients ≥18 years old with rhabdomyolysis (CPK >5,000 U/L within 72 hours of admission). Do not use in patients with pre-existing end-stage renal disease or with elevated CPK due to MI.

    When to Use
    Pearls/Pitfalls
    Why Use

    • Patients ≥18 years old with rhabdomyolysis (CPK >5,000 U/L within 72 hours of admission).

    • Do not use in patients with pre-existing end-stage renal disease or elevated CPK due to MI.

    • Can be used in both traumatic and atraumatic rhabdomyolysis.

    • Not validated for patients who have had renal replacement therapy (RRT) within 24 hours.

    • Not yet prospectively validated (has been retrospectively validated).

    • Uses readily available clinical demographic and laboratory values.

    • More specific than CPK alone at predicting need for RRT (AUROC 0.775 vs 0.631).

    ≤50
    0
    51-70
    +1.5
    71-80
    +2.5
    >80
    +3
    Male
    0
    Female
    +1
    <1.4 mg/dL (124 µmol/L)
    0
    1.4–2.2 mg/dL (124–195 µmol/L)
    +1.5
    >2.2 mg/dL (195 µmol/L)
    +3
    No
    0
    Yes
    +2
    No
    0
    Yes
    +2
    Yes
    0
    No
    +3
    <4.0 mg/dL (1.0 mmol/L)
    0
    4.0–5.4 mg/dL (1.0-1.4 mmol/L)
    +1.5
    >5.4 mg/dL (1.4 mmol/L)
    +3
    No
    0
    Yes
    +2

    Result:

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    Next Steps
    Evidence
    Creator Insights
    Dr. Gearoid M. McMahon

    About the Creator

    Gearoid M. McMahon, MD, MB, BCh, is a nephrologist at Brigham and Women's Hospital in Boston. He is also one of the editors of the popular nephrology resource Renal Fellow Network. Dr. McMahon’s research focuses primarily on acid-base disorders, acute renal failure, glomerular disease, and kidney stones.

    To view Dr. Gearoid M. McMahon's publications, visit PubMed

    Content Contributors
    About the Creator
    Dr. Gearoid M. McMahon
    Content Contributors