Chapter

Clinical investigation

Michael Doherty and Peter C. Lanyon

in Oxford Textbook of Medicine

Published on behalf of Oxford University Press

Published in print May 2010 | ISBN: 9780199204854
Published online May 2010 | e-ISBN: 9780199570973 | DOI: http://dx.doi.org/10.1093/med/9780199204854.003.1903

Series: Oxford Textbooks

Clinical investigation

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Laboratory and imaging markers are an adjunct to competent clinical assessment and should not be used as a substitute. Tests should only be ordered if the results will alter diagnosis, prognosis, or clinical management.

Synovial fluid examination—this is the key investigation to confirm the diagnosis of either acute crystal or septic arthritis. Fluid can usually be obtained by direct aspiration from any peripheral joint, or alternatively under ultrasound guidance. The identification of crystals requires compensated polarized light microscopy....

Chapter.  7408 words.  Illustrated.

Subjects: Rheumatology

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