WHAT IS ESR?
ESR stands for erythrocyte sedimentation rate. It is commonly called a “sed rate.”
It is a test that indirectly measures the level of certain proteins in the blood. This measurement correlates with the amount of inflammation in the body.
How the Test is Performed
- A blood sample is needed. Most of the time, blood is drawn from a vein located on the inside of the elbow or the back of the hand. The blood sample is sent to a lab.
The test measures how fast red blood cells (called erythrocytes) fall to the bottom of a tall, thin tube.
How to Prepare for the Test
- There are no special steps needed to prepare for this test.
How the Test will Feel
- You may feel slight pain or a sting when the needle is inserted. You may also feel some throbbing at the site after the blood is drawn.
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