ESR Test (Erythrocyte Sedimentation Rate)

The Erythrocyte Sedimentation Rate (ESR) test is a simple blood test that measures the rate at which red blood cells settle at the bottom of a tube over a certain period of time. It is a non-specific test that indicates the presence of inflammation in the body. During the test, a blood sample is drawn from a vein in the arm and placed in a test tube. The tube is then placed in an upright position, allowing the red blood cells to settle to the bottom of the tube. The rate at which the red blood cells settle is measured in millimeters per hour (mm/hr). Inflammation in the body causes the red blood cells to stick together, making them heavier and causing them to settle faster. An ESR test is often used as a screening tool to detect inflammation or infection in the body. It is commonly used to monitor conditions such as arthritis, certain autoimmune disorders, infections, and various types of cancer. However, it is important to note that an elevated ESR can be caused by a wide range of factors and does not provide a specific diagnosis. Normal ESR values can vary depending on age, gender, and other factors. In general, a high ESR level is typically considered to be above 15-20 mm/hr for men and above 20-30 mm/hr for women. A result that is significantly higher than normal may indicate the presence of an underlying health condition that requires further investigation. It is important to note that the ESR test is not specific to any particular condition and should be used in conjunction with other tests and clinical evaluations to determine the cause of inflammation in the body. If you have received abnormal ESR results, it is important to follow up with your healthcare provider for further evaluation and treatment.