* _% p' s* j* f0 B$ h1) , l+ J1 ^0 D( g7 R' W http://www.webmd.com/a-to-z-guides/c-reactive-protein-crp: i( z* w, {5 y7 V
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A 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. ! Q: b& B+ u& c0 d; Z / R/ x. \# t/ Q/ E$ p" M7 v/ V6 YHigh levels 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.. b @) H4 e; g4 e2 B. C2 O/ a
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Why It Is Done$ t% f$ y6 M% b) X
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A C-reactive protein (CRP) test is done to: : @3 I: e d* t4 T7 |! }
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: 0 [6 t- P4 H- M6 mCancer of the lymph nodes (lymphoma).- e+ d8 O r0 @6 E Z
Diseases of the immune system, such as lupus. ) \' _1 @) k$ u& c! \( EPainful swelling of the blood vessels in the head and neck (giant cell arteritis).: r' g5 A! W& v
Painful swelling of the tissues that line the joints (rheumatoid arthritis). . \) E8 x' s* Z+ `- aSwelling and bleeding of the intestines (inflammatory bowel disease).9 o, c# Q" A; R4 ~- a% ^$ U
Infection of a bone (osteomyelitis).0 W. q" |5 _3 F; w2 x