The blood glucose test measures the amount of glucose in your blood to check for diabetes and other metabolic issues.
A blood test that measures the level of creatinine in arterial blood to assess kidney function.
{"Creatinine is a waste product filtered from blood by healthy kidneys","Elevated levels may indicate kidney dysfunction or disease","The test helps doctors evaluate how well your kidneys are working","Results are used to monitor chronic conditions and medication effects","Normal ranges vary based on age, gender, and muscle mass"}
Key facts at a glance
- LOINC
- 21232-4
- Short code
- CR-ART
- Synonyms
- Creat BldA-mCnc
- Category
- kidney
- Sample
- whole-blood
- Container
- Heparinized syringe (arterial blood gas syringe) or lithium heparin tube
- Units
- not specified
- Ref low
- 0.6
- Ref high
- 1.2
- Critical range
- 0.6 not specified – 5 not specified
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 0–120 years
- Method
- Enzymatic method or Jaffe kinetic method (colorimetric)
- CPT
- 82565
- SNOMED
- 271249004
- Specimen volume
- 1-3 mL of arterial whole blood
- Stability
- Room temperature: 24-72 hours; refrigerated (2-8°C): up to 7 days; avoid freezing
- Hemolysis max
- 50
- Lipemia max
- 300
- Icterus max
- 20
- TAT
- 1–4 hours
- Order
- routine
This test measures the amount of glucose, or sugar, in your blood. Glucose is your body's main source of energy and comes from the foods you eat. The test is often done as part of a routine checkup, to help diagnose diabetes, or to monitor how well your diabetes treatment is working.
The arterial blood creatinine test measures the amount of creatinine in your blood. Creatinine is a waste product produced by normal muscle metabolism. Healthy kidneys filter creatinine from the blood and eliminate it through urine. This test uses arterial blood (blood from arteries) rather than venous blood, providing accurate measurement of creatinine levels circulating in your bloodstream.
Your doctor may order this test to screen for or diagnose diabetes, to evaluate how well you are managing your blood sugar, to check for hypoglycemia or hyperglycemia, or to assess how your body is responding to medications that affect glucose levels.
This test is primarily performed to evaluate kidney function. It helps doctors diagnose kidney diseases, monitor the progression of chronic kidney conditions, assess the effectiveness of treatments, and check if certain medications (especially those that may affect kidney function) are causing any adverse effects. In some cases, it may be ordered alongside other tests like Blood Urea Nitrogen (BUN) to get a more complete picture of kidney health.
For accurate results, you may need to fast for at least 8 hours before the test. Only water is allowed during this period. Inform your doctor about any medications you are taking, as some can affect blood sugar levels. Follow any additional instructions given by your healthcare provider.
Generally, no special preparation is required for a blood creatinine test. However, your doctor may ask you to avoid certain foods (like large amounts of meat) and strenuous exercise before the test, as these can temporarily affect creatinine levels. Always follow your healthcare provider's specific instructions and inform them about any medications or supplements you are taking.
Reference range
0.6-1.2 mg/dLnot specified
No fasting or special preparation required
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Elevated blood creatinine levels may indicate impaired kidney function, kidney disease, dehydration, urinary tract obstruction, or heart failure. Decreased levels may be seen in advanced liver disease, severe muscle loss (muscle wasting), or during pregnancy. The test results are interpreted alongside other factors including age, gender, muscle mass, and results of other kidney function tests. Persistent abnormal results require further investigation to determine the underlying cause.
Frequently asked questions
Is the test painful?
How long does it take to get results?
What is a normal creatinine level?
Can I eat before the test?
Sources
- 1
- 2
Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.
This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 10, 2026. · Read our editorial policy