Erythrocyte Sedimentation Rate (ESR)

The Erythrocyte Sedimentation Rate (ESR) test is used primarily to detect and monitor inflammatory activity within the body. While it does not pinpoint the exact cause of an issue, it serves as a crucial early warning system by measuring how quickly red blood cells settle at the bottom of a test tube. When inflammation is present, certain proteins cause these cells to clump together and fall faster. Hence, a high ESR can alert your doctor to underlying conditions such as infections, autoimmune diseases (like rheumatoid arthritis or lupus), or even certain types of cancers. It is particularly helpful for tracking how well a patient is responding to a specific treatment plan, allowing for timely adjustments to medication or lifestyle interventions.