Diagnostic tests

ESR blood test

An ESR blood test, also known as a erythrocyte sedimentation rate test, is a blood test that measures the rate at which red blood cells sediment in a tube of blood over a period of time. A "sed rate test" isn't a stand-alone diagnostic test, but it can help diagnose or monitor the progress of an inflammatory disease. The sed rate test measures the distance red blood cells fall in a test tube over an hour period.

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