creatinine clearance 2012-03-28T10:49:24Z CHEBI:16737 CMO:0000765 EFO:0007934 JSmith The clearance rate of creatinine, that is, the volume of plasma that is cleared of creatinine by the kidneys per unit time. Creatinine clearance is calculated using the level of creatinine in a sample of urine, usually one collected over a period of 24 hours, the corresponding plasma creatinine level, and the volume of urine excreted. It is used as an approximation of the glomerular filtration rate (GFR). VT:0002847 clinical_measurement_ontology creatinine clearance measurement urine creatinine measurement calculated plasma creatinine level