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

Why Is This Test Done?

Your healthcare provider may order this test to check for signs of inflammation, monitor chronic conditions like rheumatoid arthritis or lupus, evaluate infections, or assess risk for heart disease. It can also help determine how well treatment is working for certain conditions.

What Does a High or Low CRP Level Mean?

Elevated CRP levels often indicate inflammation or infection. Very high levels may suggest severe infections, infections in internal organs, or conditions like sepsis. Low levels usually mean there is little to no inflammation, but this can vary depending on your overall health and specific medical context.

How Is This Test Performed?

A blood sample is taken from a vein in your arm. The blood is then sent to a lab where it is analyzed using nephelometry, a method that measures how much light is scattered by the CRP protein in your serum or plasma.

What Are Common Conditions Monitored With CRP?

CRP is commonly used to monitor conditions such as inflammatory diseases (e.g., rheumatoid arthritis, lupus), infections (e.g., pneumonia, urinary tract infections), heart disease risk, and to evaluate responses to treatments like steroids or biologic medications.