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Title: A correction procedure for the asymmetry of differential pressure transducers in respiratory impedance measurements
Author: Farré Ventura, Ramon
Navajas Navarro, Daniel
Peslin, René
Rotger i Estapé, Maria del Mar
Duvivier, Claude
Keywords: Mesurament
Errors científics
Biomedical measurement
Measurement errors
Issue Date: 1989
Publisher: IEEE
Abstract: The usual setup for measuring respiratory input impedance requires a differential pressure transducer attached to a pneumotachograph. Because no data correction procedure has been devised to account for transducer asymmetry, a highly symmetrical transducer is required to obtain reliable impedance data. Here, a general model for the measuring system is presented. Its main feature is that differential pressure transducers are modeled as two-input-one-output systems. From the theoretical model, a dynamic calibration and data correction procedure is defined. This was tested using highly asymmetrical transducers (common-mode rejection ratio between 45 and 27 dB) to measure the impedance of two respiratory analogs. Results obtained show that respiratory input impedance can be adequately measured if data are corrected for transducer asymmetry.
Note: Reproducció del document publicat a
It is part of: IEEE Transactions on Biomedical Engineering, 1989, vol. 36, núm. 11, p. 1137-1140.
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ISSN: 0018-9294
Appears in Collections:Articles publicats en revistes (Ciències Fisiològiques)

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