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Erythrocyte Sedimentation Rate (ESR)

Erythrocyte Sedimentation Rate (ESR)

No special preparation required

The Erythrocyte Sedimentation Rate (ESR) is a diagnostic test that measures the rate at which red blood cells (erythrocytes) settle in a tube of blood. The ESR test is a simple and non- invasive test that requires only a small sample of blood, usually drawn from a vein in your arm. The ESR test measures the rate at which red blood cells sediment, or settle, in a tube of blood. The rate is influenced by the amount of protein, specifically fibrinogen, in the blood. Fibrinogen is a protein that helps the blood clot and is produced by the liver.During the ESR test, a small sample of blood is collected and placed in a tube that is then placed vertically in a machine called a Sedimentation Rate Analyzer. The rate at which the red blood cells settle to the bottom of the tube is then measured and reported in millimeters per hour (mm/hr).

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Test Details

1 Parameters

Frequently asked questions

The normal range for ESR is typically less than 20 mm/hr for women and less than 15 mm/hr for
men. However, the normal range may vary depending on age, sex, and other factors.

No, the ESR test is only a screening test and cannot be used to diagnose a specific condition.
Other diagnostic tests, such as blood cultures, imaging tests, or biopsies, may be needed to
confirm a diagnosis.

No, the ESR test is a simple and non-invasive test that requires only a small sample of blood,
usually drawn from a vein in your arm. The blood sample is collected using a needle and
syringe, which may cause a slight pinching sensation.

The ESR test is a simple and quick test that can be performed in a healthcare provider's office
or laboratory. The results of the test are usually available within a few hours or a day.

There are minimal risks or complications associated with the ESR test. The most common risk
is minor bleeding or bruising at the site where the blood sample was collected. If you experience
excessive bleeding or have a history of bleeding disorders, you should inform your healthcare
provider before the test.

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