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A new estimator to minimize the error due to breathing in the measurement of respiratory impedance
Navajas Navarro, Daniel; Farré Ventura, Ramon; Rotger i Estapé, Maria del Mar; Peslin, René
Universitat de Barcelona
This paper presents a new respiratory impedance estimator to minimize the error due to breathing. Its practical reliability was evaluated in a simulation using realistic signals. These signals were generated by superposing pressure and flow records obtained in two conditions: 1) when applying forced oscillation to a resistance- inertance- elastance (RIE) mechanical model; 2) when healthy subjects breathed through the unexcited forced oscillation generator. Impedances computed (4-32 Hz) from the simulated signals with the new estimator resulted in a mean value which was scarcely biased by the added breathing (errors less than 1 percent in the mean R, I , and E ) and had a small variability (coefficients of variation of R, I, and E of 1.3, 3.5, and 9.6 percent, respectively). Our results suggest that the proposed estimator reduces the error in measurement of respiratory impedance without appreciable extracomputational cost.
05-05-2010
Errors científics
Mesurament
Biomedical measurement
Measurement errors
Pneumodynamics
(c) IEEE, 1988
Artículo
IEEE
         

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