Measurement of synovial fluid volume using urea

Estimation of volume of epithelial lining fluid recovered by lavage using urea as marker of dilution.

Bronchoalveolar lavage is a powerful technique for sampling the epithelial lining fluid (ELF) of the lower respiratory tract but also results in a significant dilution of that fluid. To quantify the apparent volume of ELF obtained by bronchoalveolar lavage, urea was used as an endogenous marker of ELF dilution. Since urea diffuses readily through the body, plasma and in situ ELF urea concentrat...

Spectrophotometric measurement of proteoglycans in osteoarthritic synovial fluid.

Cartilage glycosaminoglycans (GAGs) were measured by a spectrophotometric assay in synovial fluid obtained from 30 normal bovine hock joints and 15 osteoarthritic human knee joints. Results were compared with those obtained by radioimmunoassay (RIA). The spectrophotometric method (dimethylmethylene blue (DMB) assay) was found to be simple, safe, and sufficiently reproducible to be of potential ...

Comparative Measurement of Rheumatoid Factor in Serum and Synovial Fluid of Rheumatoid Arthritis Patients by ELISA and Latex-Agglutination Test

Rheumatoid factors (RF) are autoantibodies with specificity for the Fc portion of human IgG. Production of RF is a characteristic feature of rheumatoid arthritis (RA) and is detectable in high titer in about 90% of these patients. In this study, we measured total IgM, IgA, IgMRF and IgARF in serum and synovial fluid of 45 RA patients by ELISA and the results were compared with those obtained b...

Elasticity of synovial fluid.

Synovial perfusion and synovial fluid solutes.

answer goes back to the cardinal signs of inflammation. The redness and heat of this state relate directly to increased local blood supply, and these critical findings cannot be examined systematically without accurate quantification of flow. Further, the imbalances of vascular permeability and tissue clearance that lead to tissue swelling cannot be evaluated usefully without an understanding o...