C-reactive protein (CRP) by nephelometry (plasma)

What Does CRP Measure?

CRP is a marker produced by your liver when your body is fighting inflammation. It can be elevated due to infections, injuries, or conditions causing chronic inflammation, such as arthritis or heart disease. Your doctor may use this test to check for signs of inflammation or to monitor treatment progress.

Your healthcare provider may order this test to assess inflammation levels, evaluate symptoms of conditions like infections, autoimmune diseases, or to monitor chronic illnesses such as heart disease or certain cancers.

CRP is often used alongside other tests to provide a fuller picture of your health. It’s particularly helpful in situations where symptoms aren’t clear-cut, such as in early-stage infections or inflammatory conditions.

A blood sample is taken from a vein, usually in your arm. The blood is processed to separate plasma, which is then analyzed using a nephelometry method to measure CRP levels.

You may feel a small pinch when the needle is inserted, but the procedure is quick and typically requires no special preparation. Avoid strenuous activity or eating heavy meals before the test to ensure accurate results.

Several factors can influence CRP levels, including recent infections, injuries, stress, smoking, or certain medications. Chronic conditions like obesity, diabetes, or heart disease can also affect CRP levels.

While CRP is a useful indicator of inflammation, it’s not definitive on its own. Your doctor will consider your overall health, symptoms, and other test results to interpret the results accurately.