What is Sedimentation Rate?
ESR is an indirect measure of inflammation in the body. The test measures the sedimentation rate (fall) of red blood cells in the blood. After the test, the mm of clear plasma at the top of the column after one hour is counted. Red cells usually fall slowly, leaving very little clear plasma. Increased blood protein levels (such as fibrinogen or immunoglobulins, which increase when there is inflammation) causes the red blood cells to drop quickly, which increases the sedimentation rate.
Why test sedimentation rate?
An SR test may be relevant if you have symptoms of inflammation.
What causes a low sedimentation rate?
Low ESR is usually clinically insignificant. It can also be caused by extremely high white blood cells (leucocytosis), and some protein abnormalities.
What causes a high sedimentation rate?
Very high ESR is usually caused by something obvious, like an infection. Moderately high levels can be caused by inflammation, kidney problems, anemia, infection, old age, and pregnancy.
More information
Age, high or low protein intake, and medications can affect urea levels. Your doctor may monitor your urea and creatinine levels if you take certain medicines
Preparations for the test
No preparation is needed for this blood test
On the day of the test
Always take ID with you when going to take a test.