Sedimentation Rate - What Is It?

A sedimentation rate is a blood test that detects nonspecific inflammation in the body. Nonspecific means the test does not identify the source of the problem or illness that is causing the inflammation. An elevated (abnormally high) sedimentation rate does suggest that there is an ongoing inflammatory process.

If you consult a doctor because you are experiencing persistent joint pain, the doctor will perform a physical examination and order diagnostic tests. You should expect your doctor to order x-rays of the affected joints, as well as certain blood tests. A sedimentation rate is typically among the first blood tests ordered when arthritis is suspected. A sedimentation rate can also be elevated when there is an infection or tumor present. Illnesses associated with the breakdown or decreased function of tissue or organs can also cause an elevated sedimentation rate. Pregnancy is yet another condition linked to an elevated sedimentation rate. Aside from diagnostic purposes, a sedimentation rate is often ordered periodically to check disease progress. Theoretically, as your condition improves, your sedimentation rate should decrease.

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