Understanding the C-Reactive Protein (CRP) Test
What It Is: The C-Reactive Protein (CRP) test measures the level of CRP, a protein produced by the liver, in your blood. CRP levels rise when there is inflammation in your body. This test helps detect inflammation and monitor conditions that cause inflammation.
Why It's Important: CRP is a marker of inflammation, and elevated levels can indicate various health conditions, including infections, autoimmune diseases, and cardiovascular diseases. Monitoring CRP levels can help diagnose and manage these conditions.
Role of CRP:
Inflammation Indicator: CRP is produced in response to inflammation. It helps the immune system respond to infections and injuries.
Cardiovascular Health: Elevated CRP levels are associated with an increased risk of heart disease and stroke. CRP can help identify individuals at higher risk for cardiovascular events.
Autoimmune Diseases: CRP levels can be used to monitor the activity of autoimmune diseases such as rheumatoid arthritis and lupus.
How CRP Works:
Production: CRP is produced by the liver in response to signals from the immune system.
Circulation: CRP is released into the bloodstream and can be measured through a blood test.
What to Expect During the Test:
Blood Sample Collection: A healthcare professional will draw a small sample of your blood, usually from a vein in your arm.
Laboratory Analysis: The sample is then sent to a lab where the level of CRP is measured.
Interpreting the Results:
Normal CRP Levels: Less than 0.3 milligrams per deciliter (mg/dL) is considered normal.
Elevated CRP Levels: Levels above 0.3 mg/dL may indicate inflammation. Higher levels can be associated with various conditions, including infections, autoimmune diseases, and cardiovascular diseases.
Why Your Doctor Might Order This Test:
Diagnosing Inflammation: To check for inflammation and monitor conditions that cause inflammation, such as infections and autoimmune diseases.
Assessing Heart Disease Risk: To evaluate your risk of developing heart disease or stroke.
Monitoring Treatment: To monitor the effectiveness of treatments aimed at reducing inflammation.
Symptoms That Might Prompt This Test:
Fever
Chills
Rapid heartbeat
Rapid breathing
Nausea and vomiting