blood chemistry measurement glomerular filtration rate clinical_measurement_ontology Calculated GFR CMO:0000490 mshimoyama Glomerular filtration rate describes the flow rate of filtered fluid through the kidney. It is calculated by comparative measurements of substances (ex. creatinine or inulin) in the blood and urine over a designated period of time. estimated glomerular filtration rate EFO:0005208 eGFR VT:0002847 cGFR 2011-01-04T02:41:58Z calculated kidney physiological measurement