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| erythrocyte sedimentation rate | |
|---|---|
| Name | Erythrocyte sedimentation rate |
| Acronym | ESR |
| Purpose | Non-specific marker of inflammation |
| Specimen | Venous blood |
| Method | Westergren or modified techniques |
erythrocyte sedimentation rate
Erythrocyte sedimentation rate is a common laboratory test used as a non-specific indicator of inflammation, infection, or tissue injury. It supports clinical assessment alongside history, physical examination, and other investigations in settings involving World Health Organization, Centers for Disease Control and Prevention, National Institutes of Health, Mayo Clinic, and Johns Hopkins Hospital protocols. Clinicians often order it in conjunction with tests recommended by guidelines from bodies such as American College of Rheumatology, European League Against Rheumatism, National Institute for Health and Care Excellence, Royal College of Physicians, and specialty societies.
The test quantifies the rate at which erythrocytes settle in anticoagulated venous blood over a fixed period, and it is interpreted in the context of conditions managed at institutions like Massachusetts General Hospital, Cleveland Clinic, Stanford Health Care, Harvard Medical School, and University of Oxford. Elevated values occur in many disorders referenced in reports from World Health Organization and case series from Mayo Clinic and may prompt evaluation for diseases such as systemic autoimmune conditions reported by American College of Rheumatology, infections reviewed by Centers for Disease Control and Prevention, malignancies discussed in texts from National Cancer Institute, and chronic inflammatory diseases described by European League Against Rheumatism. Clinicians working in settings like Veterans Health Administration and NHS England integrate ESR with imaging from Mayo Clinic Radiology and specialist input from departments at Johns Hopkins Hospital.
Measurement is based on sedimentation physics and laboratory standards set by organizations like International Organization for Standardization, Clinical and Laboratory Standards Institute, World Health Organization, and quality programs at American Association for Clinical Chemistry. The original Westergren technique, developed in contexts linked to practitioners at institutions akin to Karolinska Institutet and early 20th‑century European medical centers, remains the reference; modifications used in automated analyzers are validated by laboratories such as those at Mayo Clinic Laboratories and Quest Diagnostics. Samples are collected under protocols taught at Johns Hopkins School of Medicine and processed according to accreditation criteria from College of American Pathologists and Joint Commission. Laboratory manuals from Oxford University Press and Cambridge University Press outline procedures for tube calibration, anticoagulant selection, and timing.
Physiologic and pathologic modifiers of ESR are catalogued in reviews from New England Journal of Medicine, The Lancet, Journal of the American Medical Association, and specialty journals affiliated with American College of Physicians and European Society of Cardiology. Age and sex influences described in cohorts from Framingham Heart Study and population surveys by Centers for Disease Control and Prevention alter expected values; hematologic parameters discussed in monographs from American Society of Hematology including anemia, polycythemia, and paraproteinemias change sedimentation behavior. Acute‑phase proteins like fibrinogen and immunoglobulins increased in studies at National Institutes of Health and Institut Pasteur directly affect rouleaux formation, while technical variables studied at Massachusetts Institute of Technology laboratories—temperature, tube angle, and anticoagulant—impact results. Medications and comorbidities cited in guidelines from British Medical Journal and clinical reviews from Cochrane also modify ESR.
Reference intervals derived from population studies published by World Health Organization, Centers for Disease Control and Prevention, and national laboratories such as National Health Service (England) and Public Health England are age‑ and sex‑stratified. Interpretation algorithms used in clinical practice at centers such as Mayo Clinic, Cleveland Clinic, and Johns Hopkins Hospital emphasize integration with clinical probability, imaging from Royal College of Radiologists protocols, and other biomarkers recommended by American College of Rheumatology. ESR cutoffs for monitoring diseases like giant cell arteritis and rheumatoid arthritis are found in guidelines from British Society for Rheumatology and European League Against Rheumatism, while oncology protocols from National Cancer Institute reference paraneoplastic elevations.
Comparative performance versus C‑reactive protein and procalcitonin is evaluated in meta‑analyses appearing in The Lancet, BMJ, and Journal of Clinical Investigation; these reviews often reference trials funded by agencies such as National Institutes of Health and coordinated through academic centers including Johns Hopkins University and University of Cambridge. CRP measured by immunoassay at laboratories like Mayo Clinic Laboratories typically responds more rapidly to acute changes than ESR, whereas ESR can remain elevated in chronic inflammatory states documented in cohort studies from Framingham Heart Study and registries maintained by American College of Rheumatology. Procalcitonin guidance from Infectious Diseases Society of America contrasts with ESR recommendations in rheumatology guidelines from European League Against Rheumatism.
The sedimentation test traces its origins to 19th‑century investigations by European clinicians and laboratorians affiliated historically with institutions akin to Karolinska Institutet, University of Paris, and University of Vienna. The Westergren method and its eponym reflect contributions contemporaneous with researchers connected to centers such as Karolinska Institutet and later validation work at Royal Free Hospital and Guy's Hospital. Subsequent standardization and analytical comparisons were advanced through collaborations involving World Health Organization, International Committee on Standardization in Haematology, and national laboratories at National Institutes of Health and Public Health England.
Category:Blood tests