Serum creatinine is part of a routine lab report; creatinine clearance is not. Creatinine clearance requires a timed urine sample. All the urine you have passed within a specific time period — usually hours — is saved collected in a container and tested.
The result shows how much creatinine has passed through your kidneys into your urine. It helps show how well your kidneys are removing the waste products from your blood. There is help! Learn more about kidney disease and what you can do to stay healthy and prevent the progression of kidney disease here. Two simple tests for kidney disease. Skip to main content. You are here Home » A to Z » Creatinine. What is creatinine? What is a normal level of creatinine?
For either test, you may need to avoid eating meat for a certain period before the test. If you take a creatine supplement, you'll likely need to stop use. For a serum creatinine test, a member of your health care team takes a blood sample by inserting a needle into a vein in your arm. Results from creatinine in blood or urine are measured and interpreted in many ways, including the following:.
Creatinine usually enters your bloodstream and is filtered from the bloodstream at a generally constant rate. The amount of creatinine in your blood should be relatively stable. An increased level of creatinine may be a sign of poor kidney function.
The typical range for serum creatinine is:. The measure of serum creatinine may also be used to estimate how quickly the kidneys filter blood glomerular filtration rate. Because of variability in serum creatinine from one person to another, the GFR may provide a more accurate reading on kidney function. The formula for calculating GFR takes into account the serum creatinine count and other factors, such as age and sex. A GFR score below 60 suggests kidney disease. The range of scores below 60 may be used to monitor treatment and disease progression.
Creatinine clearance is a measure of how well the kidneys filter creatinine out of the bloodstream for excretion in urine. Creatinine clearance is usually determined from a measurement of creatinine in a hour urine sample and from a serum sample taken during the same time period. However, shorter time periods for urine samples may be used. Sometimes your care team needs answers faster. Creatinine and GFR. One important calculation your doctor will perform is to determine your estimated glomerular filtration rate eGFR.
Your glomerular filtration rate is a measurement of how well your kidneys are working to clean your blood. Your doctor will calculate your eGFR using your serum creatinine blood test results and factoring in your age, weight, body size, ethnicity and gender.
You can use our on line GFR calculator to calculate your eGFR, once you have the serum creatinine blood test results from your doctor. Your doctor may want to compare your creatinine levels over time because there are many factors that can affect results in the short term. A long-term view of creatinine levels can offer a more accurate measurement of overall kidney function. What are the symptoms of high creatinine levels?
What can I do about high creatinine? Here are some things your doctor may recommend: Follow a healthy lifestyle. Make changes to your diet to avoid stress on your kidneys. Cut back on strenuous exercise. Avoid creatine supplements.
0コメント