[Microcomputer-assisted rhinomanometry in nasal dysfunction].
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This article reviews rhinological studies of clinical relevance which were undertaken in the Airflow Laboratories of the Department of Otolaryngology, University of Toronto, during the period 1980-1987. Physiological, clinical and field studies of more than 10,000 subjects and patients are detailed. The computer-assisted methods and equipment developed and validated in our laboratories are described and examples of rhinomanometric tests are presented.
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The correlation between history, rhinoscopy and rhinomanometric results was tested on 110 subjects using a detailed questionnaire and evaluation system. The results displayed an extremely low correlation even when subjects suspected of giving invalid responses were excluded.
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The total information of a rhinomanometric measurement is given by the simultaneous registration of flow and pressure during respiration. For characterization of such a measuring curve different methods and units are used. Since no normalized procedure exists up to now, it is difficult to compare measurements of different authors. In this work the relation between various procedures is discussed and methods are given for converting different quantities. The units of the International System are discussed.
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A rhinomanometer is described which is coupled with a minicomputer and printer. The experimental results can be presented on a monitor and printed out via the printer. Besides plottings of rhinomanograms it is also possible to print out V1.5 values, the side difference, the decongestion effect, and other data of the patients in tabular form. Several measurements of the same patient, e. g. before and after decongestion, can be plotted and compared simultaneously. A nozzle system or a mask can be used. The advantages for the clinical application of this automatic computer system are described.