The results you receive from this tool are for informational purposes only and should not be the basis of your medical decision making. Creatinine clearance is still used as the standard for drug dosing, instead of gfr. For women, the formula requires multiplication by 0. Glomerular filtration rate estimate by creatinine clearence and mdrd formula in chronic renal disease. This formula is applicable only if the serum creatinine is stable. The 4 formulas are comparable markers of renal function in the overall population. Creatinine clearance calculators medical college of. The cockcroft and gault formula cg was developed in 1973 using data from 249 men with creatinine clearance ccr from approximately 30 to mlm2. Creatinine measurement should be performed using enzimatic methods. The cockcroftgault equation allows the creatinine clearance to be estimated from the serum creatinine in a patient with a stable serum creatinine. Serum creatinine and creatinine clearance crcl methods are mostly used. Using standardized serum creatinine values in the modification of diet in renal disease study equation for estimating glomerular filtration rate. Plasma creatinine mgdl age yr estimated creatinine clearance. Estimate glomerular filtration rate creatinine clearance from serum creatinine, the patients height, and a proportionality constant using the original schwartz method.
Although estimation of creatinine clearance from the cg formula could be inaccurate, in most of patients this. The cockcroftgault equation may be inaccurate depending on a patients body weight and bmi. Creatinine clearance estimate by cockcroftgault equation. With any formula the percentage of patients with impaired renal function was.
358 81 1402 1400 1019 800 1536 388 675 1478 299 864 184 718 408 1569 1454 707 276 1126 70 193 1175 197 217 957 1021 541