![]() Prompt analysis is necessary because delay may lead to false negative results. In particular, white blood cell (WBC) count in SF allows classification of SF as non‐inflammatory or inflammatory. Synovial fluid, Reagent test strip, Diagnosis, Inflammation.Īnalysis of synovial fluid (SF) is widely recognized as an important part of the diagnostic evaluation of patients with arthritis and joint effusion. In 13 of the 19 false negative results, the differential cell count showed a predominance (≥50%) of lymphocytes.Ĭonclusion. This study suggests that, in daily practice, the evaluation of SF by reagent strips could be of use to discriminate between inflammatory and non‐inflammatory SF. ![]() Results. Two hundred and eight samples of SF were tested. Sensitivity, specificity, predictive values and likelihood ratio (LR) of the reagent strip in diagnosing inflammatory SF were determined. All SF specimens obtained were tested using two techniques: (i) white blood cell (WBC) count with the differential according to standard practice (which is considered the gold standard) (an inflammatory SF was defined as a WBC count ≥2000 cells/mm 3) and (ii) reagent strips used to test urine (Multistix 8 SG, Bayer Diagnostics) for the presence of leucocytes (a positive test was defined as a strip showing more than a trace for leucocytes). Methods. Consecutive patients undergoing diagnostic arthrocentesis, attending the Department of Rheumatology of a large tertiary care hospital were evaluated. Objective. To determine the usefulness of reagent test strips for screening inflammatory synovial fluid (SF). ![]()
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