click below
click below
Normal Size Small Size show me how
Kidney Formulas
Formulas for test
Question | Answer |
---|---|
1) Urinary Anion Gap | UAG = Na+ - K+ - Cl- |
2) Plasma anion gap | AG = Na+ - Cl- - H3CO3 |
3) Winter''s formula | Expected pCO2 = 1.5 * HCO3- + 8 +/- 2 |
4) clearance | clearance (GFR) = [UV]/P = urine concentration creatinine * volume flow rate / plasma concentration creatinine |
5) Cockcroft Gault | Cockcroft-Gault GFR =(140-age)*(Wt in kg)*(0.85 if female)/(72 * Cr) |
6) FENa | FENa = % Clearance Na/ Clearance Cr = 100(UNa/PNa)/(UCr/PCr) 7) Water deficit calculation |