🔬 Discovery

Erythrocyte sedimentation rate (ESR)

Velocidad de sedimentación globular

Date
1897 · confidence high
Place
Warsaw, Poland
Credited to
Edmund Biernacki
Field
Life & health

What was discovered

Polish pathologist Biernacki observed that the rate at which red blood cells settle in a tube of unclotted blood varies with the patient's inflammatory state, and proposed measuring it as a simple diagnostic test. The test, known in Poland as "Biernacki's reaction", is still used today to detect inflammation and infection.

What it led to

  • Routine clinical blood tests
  • Diagnosis of inflammatory and rheumatic diseases

Built on

  • Quantitative haematology

Links

Sources✓ verified 2026-09-28