ESR (Erythrocyte Sedimentation Rate) Vacuum Blood Tubes are specialized blood collection tubes used to measure the rate at which red blood cells (erythrocytes) settle at the bottom of a test tube over a specific period, typically one hour. This rate is an important diagnostic indicator of inflammation and certain medical conditions.ESR tubes play a critical role in diagnosing and monitoring conditions involving inflammation, and their precise design ensures reliable and consistent test results.