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Augmented RIC model of respiratory systems

  • US 20080139956A1
  • Filed: 12/06/2006
  • Published: 06/12/2008
  • Est. Priority Date: 12/06/2006
  • Status: Active Grant
First Claim
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1. A method for analyzing the respiratory characteristics of a human respiratory system from impulse oscillometry data, comprising the steps of:

  • obtaining a mechanical impedance characteristic for the respiratory system from measured impulse oscillometry data values, taken at a plurality of test frequencies, of air pressure and air flow at the entrance to the respiratory system of a human subject;

    applying a linear network analogue of the human respiratory system having a first resistance, a first inductance and a first capacitance connected in series between first and second terminals, a second resistance connected across the first capacitance, and a second capacitance connected between the first and second terminals, wherein each such electrical component represents a parameter value of the respiratory system; and

    estimating parameter values of the linear network analogue of electrical components to produce an electrical impedance analogue that matches the measured mechanical impedance characteristic within a predetermined tolerance over the frequency range of at least 5 to 35 Hz. and wherein the compliance parameter values are less than 10 liter/cmH2O.

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