; k% X: t, ^. t- Z8 M' `: A1) 9 O* Q% f: I0 P3 J: a' W- l http://www.webmd.com/a-to-z-guides/c-reactive-protein-crp : n% z' J3 U+ I! s8 x7 Z。。。。。。 P, U: T4 M0 s- q
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.: U2 Z% ]9 g% f7 x& I
' e$ y( k! ?5 v$ [) Z% g2 V. O' I* }8 c2 LHigh 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. 5 \4 d2 Q2 J6 V+ i3 f8 L% m- I( q9 _9 W$ ?* F8 Q9 o
Why It Is Done " A6 D" G( X1 W d. f0 | C6 b" x. w9 G. c3 c! _" q+ O# M) h# h; I
A C-reactive protein (CRP) test is done to:% f `: @5 F: y( ^' F3 u+ _
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: 7 A, i2 i3 |2 oCancer of the lymph nodes (lymphoma). 3 B$ g! K$ k0 w( V: B! RDiseases of the immune system, such as lupus.% D' L2 S+ s. t* Z
Painful swelling of the blood vessels in the head and neck (giant cell arteritis). * @1 t& C; F1 ]1 `$ _2 n9 OPainful swelling of the tissues that line the joints (rheumatoid arthritis).2 k, p( d$ X: i: z: T) X9 J
Swelling and bleeding of the intestines (inflammatory bowel disease).: r, p$ S: o0 Z' l! m% F
Infection of a bone (osteomyelitis). 6 I" m* O1 T% ]