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Medical respiration monitor respiratory resistance value calculating device

A breathing resistance and breathing monitoring technology, applied in the evaluation of respiratory organs, etc., can solve problems such as poor real-time performance and complex calculations

Inactive Publication Date: 2012-06-13
DONGGUAN UNIV OF TECH
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Problems solved by technology

This method needs to carry out the Fourier transform (and its inverse transform) with a huge amount of calculation, the calculation is complex, and the real-time performance is not strong

Method used

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  • Medical respiration monitor respiratory resistance value calculating device
  • Medical respiration monitor respiratory resistance value calculating device

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Embodiment Construction

[0020] The present invention is described in detail below through model experiments.

[0021] The coherence function of each 16-second signal of the system input (oscillating pressure) and output (oscillating flow) of the R-I-E model The average value is 0.98.

[0022] In BiPAP ventilation mode, the oscillation generator is 8~24cmH in IPAP 2 O, EPAP is 4cmH 2 Under the fluctuating airway pressure of O, the output frequency is 1-7Hz and the amplitude is 1-4cmH stably. 2 For sinusoidal oscillation of O, choose 5Hz as the oscillation frequency. The oscillatory waves are harmoniously superimposed on the airway pressure and flow waveforms. The system works stably for a long time, and the calculated respiratory system Zrs , Rrs with Xrs The time curve is smooth and regular, less disturbed, and the phase change is consistent with the breathing cycle.

[0023] In BiPAP ventilation mode, the oscillation generator is 8~24cmH in IPAP 2 O, EPAP is 4cmH 2 Under the fluctuating...

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Abstract

The invention discloses a medical respiration monitor respiratory resistance value calculating device, which is a functional module frame. A method for implementing the device comprises the following steps of: performing moving average filtering on original respiration oscillation pressure signal and flow signal obtained by data acquisition in a time domain to obtain a respiration pressure component signal and a flow component signal; subtracting the respiration pressure component signal and the flow component signal from the original respiration oscillation pressure signal and flow signal to obtain an oscillation pressure component signal and a flow component signal absorbed and refracted by lung tissues; and approximately calculating amplitudes and phases of the oscillation pressure component signal and the flow component signal by using a Fourier coefficient of a fundamental wave component in the oscillation component signal, thereby obtaining impedance components and / or reactance components of the signals. An approximate respiration resistance value can be obtained without Fourier conversion of huge operation; and the method is simple in calculation and has high practicability.

Description

technical field [0001] The invention relates to the data analysis of the collected respiratory signals based on the forced oscillation technology, in particular to the functional module framework established for implementing the calculation method of the respiratory resistance value of the medical respiratory monitor. Background technique [0002] The forced oscillation technique (FOT) is a non-invasive method for evaluating the mechanical properties of the respiratory system, which is simple, objective and real-time. Its working principle is to generate a pressure oscillation of a specific frequency and amplitude through the oscillation generator, apply it to the subject's respiratory airflow through the mouth, and measure the oscillating pressure and oscillating flow absorbed and refracted by the airway and lung tissue. Using the time-domain analysis technique, the total respiratory impedance (impedance, Zrs ), which is customarily called breathing resistance. In recent ...

Claims

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Application Information

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IPC IPC(8): A61B5/08
Inventor 刘华珠陈雪芳杨海勇黄刊辉
Owner DONGGUAN UNIV OF TECH
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