Kidney Function Efficiency Test - Enzymatic Creatinine Test

Measurement of creatinine concentration in serum using enzymatic method. Creatinine is a byproduct of energy production in muscles (from creatine phosphate) and is eliminated from body at relatively constant rate through glomerular filtration in kidneys. Creatinine level in blood primarily reflects glomerular filtration rate (GFR), the main standard for assessing kidney functions.