Transtubular Potassium Gradient (TTKG)
Determines if potassium derangements are due to renal or extra-renal cause.
Note that this formula is valid only when Uosm >300 and UNa >25. This test can help determine the source of potassium imbalance.
Transtubular Potassium Gradient (TTKG) = (POsm * UPotassium ) / (PPotassium x UOsm)
Posted in: Endocrine/Metabolic • Endocrinology • Nephrology • Renal
