Synonyms/Also Known as
Blood Creatinine, Serum Creatinine
BUN, BUN/Creatinine Ratio, eGFR, Creatinine Clearance, Comprehensive Metabolic Panel, Basic Metabolic Panel, Urine Protein to Creatinine Ratio, Urine Albumin and Urine Albumin/Creatinine Ratio, Renal Panel, Cystatin C, Beta-2 Microglobulin
Why get tested?
To evaluate the renal status, help diagnose kidney diseases and to monitor treatment for kidney diseases.
When to get tested?
Routinely as part of a comprehensive renal function test panel, symptoms of kidney disease or damage are present and at regular intervals to monitor treatment for kidney disease or kidney function while on certain medications.
Test preparation needed
No special preparation required
About The Test
How is it used
1. Will exercise affect creatinine levels?
Excess excercise may slightly increase the levels of serum creatinine, but not to the abnormal levels, due to building of muscle mass.
2. Does diet affect creatinine levels?
Eating cooked meat prior to testing can increase the level of creatinine temporarily.
3. What is creatine? Can dietary creatine increase creatinine levels?
Creatine is synthesised in the liver and transported to muscles, where it is used as a source of energy for muscle activity. In the muscle, some of the creatine is spontaneously converted to creatinine. As the levels of both creatine and creatinine depend on muscle mass, men usually have higher levels than women. Creatine is now available as a dietary supplement, which can increase the serum creatinine levels.
4. Can age change creatinine levels?
Creatinine levels relate to both muscle mass and to kidney function. As age increases, muscle mass decreases but kidneys tend to function less effectively, so there is not much change in the net creatinine levels in the blood.
5. What is a BUN/Creatinine ratio?
The normal BUN/creatinine ratio is usually between 10:1 and 20:1. It increases due to decreased flow of blood to the kidneys (in conditions such as congestive heart failure or dehydration), gastrointestinal bleeding, or increased protein in the diet. It is decreased in liver disease and malnutrition.