During the procedure
Blood is drawn from a vein, usually from your arm. Before the needle is inserted, an elastic band around your upper arm causes the veins in that arm to fill with blood, and the puncture site is cleaned with antiseptic.
After the needle is inserted, a small amount of blood is collected into a vial or syringe. The band is then removed to restore circulation, and blood continues to flow into the vial. Once enough blood is collected, the needle is removed and the puncture site is covered with a pressure wrap.
This relatively painless procedure will likely take only a few minutes.
After the procedure
After your CRP test, you should be able to drive yourself home and do your normal activities.
It may take a few days for you to get your results back. Your doctor should explain to you what the results of your test mean.
If you're having an hs-CRP test to help find out your heart disease risk, keep in mind that your CRP level is only one risk factor for coronary artery disease. If your test result shows you have a high CRP level, it doesn't necessarily mean you're at a higher risk of developing heart disease.
Talk to your doctor about your other risk factors and ways you can try to prevent coronary artery disease and a heart attack.
Dec. 12, 2014
- Greenland P, et al. ACCF/AHA guideline for assessment of cardiovascular risk in asymptomatic adults: A report of the American College of Cardiology Foundation/American Heart Association Task Force on Practice Guidelines. Circulation. 2010;122:e584.
- Morrow DA. C-reactive protein in cardiovascular disease. http://www.uptodate.com/home. Accessed Oct. 19, 2014.
- Morrow DA. Screening for cardiovascular disease with C-reactive protein. http://www.uptodate.com/home. Accessed Oct. 19, 2014.
- McKean SC, et al. Principles and Practice of Hospital Medicine. New York, N.Y: The McGraw-Hill Companies; 2012. http://www.accessmedicine.com/resourceTOC.aspx?resourceID=749. Accessed Oct. 19, 2014.
- WHO guidelines on drawing blood: Best practices in phlebotomy. World Health Organization. http://whqlibdoc.who.int/publications/2010/9789241599221_eng.pdf. Accessed Oct. 19, 2014.