Medical Calculator – SonDoctor.com
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TTKG Calculator
Net K secretion by distal nephron before the effect of ADH, correcting for water reabsorption via urine osmolality.
TTKG = (Urine K / Plasma K) × (Plasma Osm / Urine Osm)
※ TTKG is valid when urine Na ≥ 25 mEq/L and urine Osm ≥ plasma Osm.
Hypokalemia
TTKG ＜ 3 : appropriate renal response
TTKG ＞ 7 : renal K wasting
Hyperkalemia
TTKG ＜ 6 : inappropriate renal response
Nephrology
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TTKG Calculator
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