Erythrocyte Sedimentation Rate (ESR): MedlinePlus Lab Test Information

What’s an Erythrocyte Sedimentation Fee (ESR)?
An erythrocyte sedimentation charge (ESR) is a kind of blood take a look at that measures how rapidly erythrocytes (purple blood cells) settle on the backside of a take a look at tube that incorporates a blood pattern. Usually, purple blood cells settle comparatively slowly. A faster-than-normal charge might point out irritation within the physique. Irritation is a part of your immune response system. It may be a response to an an infection or harm. Irritation may be an indication of a continual illness, an immune dysfunction, or different medical situation.
Different names: ESR, SED charge sedimentation charge; Westergren sedimentation charge

What’s it used for?
An ESR take a look at can assist decide you probably have a situation that causes irritation. These embrace arthritis, vasculitis, or inflammatory bowel illness. An ESR may be used to observe an present situation.

Why do I want an ESR?
Your well being care supplier might order an ESR you probably have signs of an inflammatory dysfunction. These embrace:
What occurs throughout an ESR?
A well being care skilled will take a blood pattern from a vein in your arm, utilizing a small needle. After the needle is inserted, a small quantity of blood will probably be collected right into a take a look at tube or vial. You could really feel just a little sting when the needle goes in or out. This often takes lower than 5 minutes.

Will I must do something to arrange for an ESR?
You do not want any particular preparations for this take a look at.

Are there any dangers to the take a look at?
There’s little or no threat to having an ESR. You might have slight ache or bruising on the spot the place the needle was put in, however most signs go away rapidly.

What do the outcomes imply?
In case your ESR is excessive, it could be associated to an inflammatory situation, corresponding to:
Generally the ESR will be slower than regular. A gradual ESR might point out a blood dysfunction, corresponding to:
In case your outcomes usually are not within the regular vary, it does not essentially imply you’ve got a medical situation that requires therapy. A average ESR might point out being pregnant, menstruation, or anemia, slightly than an inflammatory illness. Sure medicines and dietary supplements may also have an effect on your outcomes. These embrace oral contraceptives, aspirin, cortisone, and vitamin A. Be sure you inform your well being care supplier about any medication or dietary supplements you take.

Is there anything I must find out about an ESR?
An ESR doesn’t particularly diagnose any illnesses, however it may present details about whether or not or not there’s irritation in your physique. In case your ESR outcomes are irregular, your well being care supplier will want extra info and can probably order extra lab checks earlier than making a analysis.


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