High-sensitivity C-reactive protein (hs-CRP) test
What is being analysed in this test?
High-sensitivity C-reactive protein (hs-CRP) is a blood test that measures the levels of C-reactive protein (CRP) in your bloodstream. CRP is a substance produced by the liver in response to inflammation. High levels of CRP can indicate inflammation in the body, which may be caused by various conditions such as infections, chronic diseases, or autoimmune disorders.
The result of the hs-CRP test indicates the level of inflammation in your body. Higher levels of hs-CRP suggest increased inflammation, while lower levels indicate less inflammation.
Why perform the analysis?
The hs-CRP test is performed to assess the risk of cardiovascular diseases, such as heart attack or stroke. It is also used to monitor inflammatory conditions like rheumatoid arthritis or lupus, as well as to evaluate the effectiveness of treatment for these conditions.
When should the analysis be done?
The hs-CRP test may be ordered as part of a routine health checkup, especially for individuals with risk factors for heart disease, such as high blood pressure, high cholesterol, or a family history of cardiovascular problems. It may also be recommended if you have symptoms of inflammation or if your doctor suspects an underlying inflammatory condition.
What sample is required?
A sample of blood is required for the hs-CRP test. This sample is usually obtained through a simple blood draw from a vein in your arm.
Is any prior preparation necessary?
No specific preparation is usually required for the hs-CRP test. However, it's essential to inform your doctor about any medications you're taking, as certain drugs may affect the results.
What are the normal values?
The normal range for hs-CRP levels may vary depending on the laboratory and the specific assay used. However, in general:
- Low risk: Less than 1.0 mg/L
- Average risk: 1.0 to 3.0 mg/L
- High risk: Greater than 3.0 mg/L
Table of normal values:
|
Risk Level |
hs-CRP Level (mg/L) |
|---|---|
|
Low |
Less than 1.0 |
|
Average |
1.0 - 3.0 |
|
High |
Greater than 3.0 |
Understanding the results of the hs-CRP test requires interpretation by a healthcare professional in the context of your overall health and medical history. If you have any questions or concerns about your hs-CRP test results, it's essential to discuss them with your doctor.
What does having altered values mean?
- Low levels: Low levels of hs-CRP usually indicate a lower risk of cardiovascular disease and inflammation.
- High levels: High levels of hs-CRP may indicate an increased risk of cardiovascular disease or inflammation in the body. However, elevated levels do not necessarily pinpoint the exact cause of inflammation and further evaluation may be needed to determine the underlying condition.