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    Attention COACH STUDY participants:

    The principal investigators of the study request that you use the official version of the modified score here.

    Transtubular Potassium Gradient (TTKG)

    May help in assessment of hyperkalemia or hypokalemia.
    When to Use
    Pearls/Pitfalls

    Patients with hyper- or hypokalemia (defined as K+ <3.5 or >5.0 mEq/L in this calculator).

    TTKG is sometimes criticized for being inaccurate, particularly in the evaluation of hyperkalemia. 

    mEq/L
    mEq/L
    mOsm/kg
    mOsm/kg

    Result:

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    Evidence
    Creator Insights
    Dr. Mitchell L. Halperin

    About the Creator

    Mitchell L. Halperin, MD, is a professor of medicine at University of Toronto. He is also an attending physician at St. Michael’s Hospital in Toronto, Canada. Dr. Halperin’s primary research is focused on renal physiology, acid base homeostasis, and metabolic regulation.

    To view Dr. Mitchell L. Halperin's publications, visit PubMed

    Are you Dr. Mitchell L. Halperin? Send us a message to review your photo and bio, and find out how to submit Creator Insights!
    MDCalc loves calculator creators – researchers who, through intelligent and often complex methods, discover tools that describe scientific facts that can then be applied in practice. These are real scientific discoveries about the nature of the human body, which can be invaluable to physicians taking care of patients.
    About the Creator
    Dr. Mitchell L. Halperin
    Are you Dr. Mitchell L. Halperin?
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