ESR test is also known as Erythrocyte Sedimentation Rate or Sed Rate. This test has been used for many years to detect diseases and infections like cancers, kidney disease, thyroid disorder, heart infection and autoimmune diseases. The erythrocyte sedimentation rate helps to measure how the red blood cells (erythrocytes) get collected at the bottom of a test tube where blood is collected.
The erythrocyte sedimentation rate (ESR or sed rate) is the rate at which red platelets silt in a time of 60 minutes. It is a typical hematology test and is a non-particular measure of inflammation.
During the test, your red blood cells will cling together and will form a clump together. The clump will sink inside the tube with your blood sample and will allow your doctor to judge how much clumping is occurring. If the cells sink fast then there are better chances that inflammation is present.
The test only identifies whether the inflammation is present in your body or not. It doesn’t help in pinpointing the cause of inflammation. This is the reason the doctor doesn’t perform this test alone, instead, they combine it with various other tests.