COMPREHENSIVE DIAGNOSTICS OF OUT-OF-HOSPITAL PNEUMONIA USING FLOW-NORMALIZED PHONOPNEUMOGRAPHY OF QUIET BREATHING

Abstract

Spectral criteria have been developed for flow-normalized phonopneumography of quite breathing used in the acoustic diagnostics of out-of-hospital pneumonia patients. In a test sample of subjects, the maximal specificity was 80,3% in defining the healthy conditions, and the maximal sensitivity was 83,3% in detecting inflammation foci. Hence, the sensitivity of this method is much greater than that of subjective auscultation (about 50%). Acoustic changes in pneumonia foci have been  found to be consistent with current ideas about the pathomorphological features of pulmonary inflammation, which include the syndrome of pulmonary indurations corresponding to inflammatory foci. The types and threshold values of acoustic patterns have been defined.