A creatinine clearance test shows how fast your kidneys remove creatinine from the blood. Clearance is measured in milliliters per minute (ml/min). In general, the lower the creatinine clearance, the worse the kidneys are working. Although it differs slightly for men and women, normal values are between 100-140 ml/min. Below this range, kidneys are not working at capacity.
a test uses 24-hour urine and serum creatinine levels to determine the glomerular filtration rate, a sensitive indicator of renal function
A 24-hour urine collection test to assess how the kidneys are functioning.
A calculated value that is a good indicator of kidney function. Since serum creatinine is filtered by the kidneys based on kidney function, it is possible to measure the total urinary creatinine passed in 24 hours and calculate how much blood was filtered by the kidneys in that time to produce the creatinine found in the sample. It comes out to about 100 cc's per minute. Anything below 30 cc's is considered to be kidney failure.
In general, creatinine clearance is the removal of creatinine from the body. In renal physiology, creatinine clearance (CCr) is the volume of blood plasma that is cleared of creatinine per unit time. Clinically, creatinine clearance is a useful measure for estimating the glomerular filtration rate (GFR) of the kidneys.
