INTRODUCTION TO RESPIRATORY MECHANICS MEASUREMENT BY ENHANCED INTERRUPTER METHOD

Ireneusz Jablonski, Janusz Mroczka

Abstract

In the paper, there are postulated the basic requirements for the effective modification of a standard scheme of the interrupter technique (IT). The new method dedicated to respiration mechanics measurements, which meets such assumptions, is called enhanced interrupter technique (EIT). Using the idea of indirect measurements, it was showed by computer simulations the possibility to estimate the more number of parameters in EIT than in IT (only airway resistance R_aw) for the proposed, modified Dubois’ model. EIT gives the higher accuracy and the reduced dispersion of the measurement results, at the same time. As it follows from the computer simulations, analysing the measurement data in the time domain and the use of as quick as possible occlusion valve (occlusion needs to include both the sudden, postocclusional transient states and the slow rise of the pressure at the mouth P_ao) is essential to optimize EIT from the metrological point of view. The worked out problems are a base to construct a portable device, dedicated to measurement of the mechanical properties of the respiratory system.

Keywords

indirect measurement, enhanced interrupter technique, system identification

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PWC-2006-TC13-029u.pdf

DOI

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IMEKO TC

TC13 - Measurements in Biology and Medicine

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