C-Reactive Protein (CRP)
C-reactive protein (CRP) test is a blood test that measures the amount of a
protein called C-reactive protein in your blood.
C-reactive protein measures general levels of
inflammation in your body.
of CRP are caused by infections and many long-term diseases. But a CRP test
cannot show where the inflammation is located or what is causing it. Other
tests are needed to find the cause and location of the inflammation.
Why It Is Done
A C-reactive protein (CRP) test is done
- Check for infection after surgery. CRP levels
normally rise within 2 to 6 hours of surgery and then go down by the third day
after surgery. If CRP levels stay elevated 3 days after surgery, an infection
may be present.
- Identify and keep track of infections and diseases
that cause inflammation, such as:
- Check to see how well treatment is working, such
as treatment for cancer or for an infection. CRP levels go up quickly and then
become normal quickly if you are responding to treatment measures.
A special type of CRP test, the high-sensitivity CRP test
(hs-CRP), may be done to help find out your risk of a heart attack and stroke. The results can help you and your doctor make decisions about how to lower your risk. The connection between hs-CRP levels and the risk of heart attack and stroke are not understood completely. But high levels may mean that the lining of your arteries are inflamed. This may damage the arteries and raise your risk of a heart attack and stroke.