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Laboratory investigations in gout 

Laboratory investigations in gout
Chapter:
Laboratory investigations in gout
Author(s):

Eliseo Pascual

and Francisca Sivera

DOI:
10.1093/med/9780199668847.003.0042
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date: 03 June 2020

Gout is a consequence of hyperuricaemia and the treatment goal is to dissolve the crystals by reducing serum urate levels. The first section of this chapter focuses on laboratory investigations on gout, reviewing serum urate levels and its determinants, methods of measurement, and urate renal handling. Additionally it reviews the use of inflammatory markers and synovial fluid cell counts. The second section of the chapter deals with the identification of monosodium urate and calcium pyrophosphate crystals in synovial fluid. It reviews the use of an optic microscope fitted with polarized filters and an analyser. A clear step-by-step process with useful tips is provided.

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