Your provider will give you directions on where to go to for the blood test when you pick up your test materials. This will need to be done at a lab, healthcare facility or your provider’s office. The second part of the test involves having your blood drawn. You just need to stick to a schedule for collecting your urine samples and make sure not to miss any collections (do not flush any urine). During this time, you can still participate in your normal daily activities. You will collect your urine over a 24-hour period of time at home. Part of the creatinine clearance test is done at home and the other part in a lab. Is the creatinine clearance test done at home? The results of this test can lead to a diagnosis of kidney disease. Your healthcare provider will want to know how well your kidneys are working. The creatinine clearance test is to confirm the level of kidney function reported with the eGFR level. Why is the creatinine clearance test done? However, as the disease progresses, you may experience a few symptoms. Kidney disease tends to be silent and, for many people, there are no symptoms in the early stages. Are there any symptoms associated with a high creatinine level? As a result, creatinine clearance is rarely used in modern practice. However, there are ways to check this, such as with the eGFR result using cystatin C, another blood test. Examples includes when people have very little or a lot of muscle on their bodies. The creatinine clearance test is done when your healthcare provider thinks that the eGFR result given with your blood creatinine level may not be accurate. When is the creatinine clearance test done? Heritage (there’s a higher risk for people of an African-American, Asian, Native American or Pacific Islander background).Age (you could be at a higher risk after age 60).However, some people have a higher risk of developing a kidney problem than others. Why do I need to have the creatinine clearance test?Īnyone can be at risk for a kidney disease at some point in their life. If your kidneys aren’t working properly, than you may have higher levels of creatinine in your blood than you should. The material that’s removed from your blood leaves your body in your urine. They’re responsible for cleaning your blood. If you think of each organ in your body as having a job, the kidneys are the filters. Normally, creatinine is filtered out of your blood by your kidneys.

This is when creatine becomes creatinine. This natural breakdown of muscle tissue causes creatinine to be released into your bloodstream. As you muscles use energy the tissue that makes up your muscles breaks down. Creatine is a chemical that your body uses to supply your muscles with energy. What is creatinine?Ĭreatinine is actually a waste product of creatine. It has largely been replaced by the estimated GFR (eGFR) equations using creatinine levels in the blood - which means a 24-hour urine collection is not needed. The creatinine clearance test is not used very often any more. The GFR is the main number used by your provider to determine how well your kidneys are working. Creatinine clearance is one way to estimate your glomerular filtration rate (GFR), or how well the kidneys are filtering your blood. The results of the test will be used in a mathematic formula that figures out your creatinine clearance.

These samples are then tested to see how much creatinine was filtered through your kidneys over the 24-hour window. Abnormal levels of creatinine in your urine and blood could point to an issue like kidney disease.ĭone in two parts, the creatinine clearance test involves collecting your urine over a 24-hour period of time and then having your blood drawn. This test allows your healthcare provider to look at samples of your urine and blood to see how much of the waste product - creatinine - is filtered out by your kidneys. The creatinine clearance test is an older test used to check your kidney function.

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