METHOD FOR DIFFERENTIAL DIAGNOSIS OF EXUDATIVE PLEURITIS OF OBSCURE ETIOLOGY

摘要

The method for the differential diagnosis of the exudative pleuritis of the obscure etiology consists in examining the pleural fluid. The fluid is centrifuged, the supernatant is collected and diluted by the phosphate buffer. To the assayed sample, disodium salt of ethylenediamine tetraacetic acid is added, then the serum of the donor of group I, and finally the silver nitrate. The solution is kept in daylight until the pale brown coloration. The spectra of the assayed sample and the control one are recorded by spectrophotometer. The curves of the optical density are analyzed. The pleuritis of the tumor or tubercular etiology as well as the pleuritis of non-specific inflammatory etyology are diagnosed according to the type of the spectrogram and the peaks at the specified wavelengths.