The provided information describes an "ESR" (Erythrocyte Sedimentation Rate) blood test, not an "ESD" blood test. Since "ESD blood test" is not a standard medical term, this response will address the common confusion and explain the ESR blood test. It is possible "ESD" is a typographical error.
The Erythrocyte Sedimentation Rate (ESR) test is a type of blood test that measures how quickly red blood cells (erythrocytes) settle at the bottom of a test tube in one hour. It indirectly measures the presence of inflammation in the body.
Understanding the ESR Test
Here's a more detailed breakdown:
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What it measures: The ESR measures the rate at which red blood cells sediment (settle) in a tube over a period of one hour. Inflammation can cause red blood cells to clump together. These clumps are heavier and settle faster.
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Why it's done: The ESR test is used to help detect and monitor inflammation in the body. It's not specific for any one condition, but rather indicates the presence of inflammation. Doctors use it to:
- Help diagnose conditions associated with inflammation, such as:
- Infections
- Autoimmune diseases (e.g., rheumatoid arthritis, lupus)
- Certain cancers
- Monitor the progress of inflammatory diseases.
- Monitor response to treatment of inflammatory conditions.
- Help diagnose conditions associated with inflammation, such as:
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How it's performed: A blood sample is taken, usually from a vein in your arm. The sample is then placed in a tube, and the distance the red blood cells fall in one hour is measured.
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Interpreting the results: The ESR is measured in millimeters per hour (mm/hr). Normal ranges vary depending on age and sex. Elevated ESR levels suggest inflammation, but further testing is necessary to determine the cause.
- Factors that can influence ESR results:
- Age
- Sex
- Pregnancy
- Anemia
- Kidney disease
- Factors that can influence ESR results:
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Important Note: The ESR is a non-specific test. A high ESR result does not automatically mean you have a serious condition. Many factors can influence the ESR, so your doctor will consider your ESR results along with your other symptoms, medical history, and other test results to make a diagnosis.
In summary, if you are looking for information about a blood test related to inflammation, you likely are interested in the Erythrocyte Sedimentation Rate (ESR) test. If you meant something else by "ESD," please clarify the test name.
