Sedimentation Rate-Westergren (ESR)

Erythrocyte Sedimentation Rate (ESR or Sed Rate) is a non-specific marker of inflammation. It measures how quickly red blood cells settle in a test tube; faster settling occurs when inflammatory proteins (like fibrinogen) are elevated. While less sensitive than hs-CRP for low-grade inflammation, ESR can be useful for monitoring certain inflammatory conditions (e.g., autoimmune diseases, infections). Results are interpreted based on standard laboratory reference ranges, which vary by age and sex.