C-reactive protein (CRP) tests are a type of blood test used to measure the amount of CRP in the blood. CRP is a protein produced by the liver in response to inflammation in the body. Healthcare providers use CRP tests to help diagnose and monitor conditions that cause inflammation, such as infections, autoimmune diseases, and certain types of cancer.
When would I need a C-reactive protein (CRP) test?
Your healthcare provider may order a CRP test if you have symptoms of an infection or inflammation, such as fever, joint pain, or swelling. It may also be ordered if you have a family history of certain conditions, such as heart disease or cancer.
Who performs a CRP test?
A healthcare provider, such as a doctor or nurse, will perform the CRP test. The test is usually done in a doctor’s office or hospital.
How do I prepare for a C-reactive protein (CRP) test?
No special preparation is needed for a CRP test. You may be asked to fast for 8-12 hours before the test.
What should I expect during my CRP test?
During the test, a healthcare provider will draw a sample of your blood. The sample will be sent to a laboratory for testing.
What should I expect after my CRP test?
After the test, you may experience some minor bruising or discomfort at the site where the blood was drawn.
What are the risks of a C-reactive protein (CRP) test?
CRP tests are generally safe and have few risks. The most common risk is minor bruising or discomfort at the site where the blood was drawn.
When should I know the results of my C-reactive protein (CRP) test?
Your healthcare provider will usually have the results of your CRP test within a few days.
What type of results do you get for a C-reactive protein (CRP) test?
The results of a CRP test are reported as a number. The normal range for a CRP test is 0-3 mg/L.
What does a high CRP level mean?
A high CRP level may indicate inflammation or infection in the body. The level of CRP in the blood is divided into three categories:
- Moderate elevation:
3-10 mg/L
- Marked elevation:
10-50 mg/L
- Severe elevation:
>50 mg/L
What does a low CRP level mean?
A low CRP level may indicate that there is no inflammation or infection in the body.
Should I be concerned if my CRP level is abnormal?
If your CRP level is abnormal, you should talk to your healthcare provider. They can help you understand the results and determine the best course of action.
References
- Mayo Clinic. (2020). C-reactive protein (CRP) test. Retrieved from https://www.mayoclinic.org/tests-procedures/c-reactive-protein-crp-test/about/pac-20385020
- Lab Tests Online. (2020). C-reactive protein (CRP). Retrieved from https://labtestsonline.org/tests/c-reactive-protein-crp
- WebMD. (2020). C-reactive protein (CRP) test. Retrieved from https://www.webmd.com/a-to-z-guides/c-reactive-protein-crp-test#1
Keywords
C-reactive protein, CRP test, inflammation, infection, normal range, high CRP level, moderate elevation, marked elevation, severe elevation, low CRP level.