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Respiration impedance measuring device and method, and respiration impedance display method

A technology of respiratory impedance and measuring device, which is applied in the direction of diagnostic recording/measurement, medical science, sensors, etc., can solve the problem that noise cannot be fully removed, and achieve the effect of reliable removal and high respiratory impedance measurement

Active Publication Date: 2011-01-26
捷斯特公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, even with the above-mentioned conventional devices, it cannot be said that the noise has been sufficiently removed, and a higher-performance respiratory impedance measurement device has been demanded.

Method used

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  • Respiration impedance measuring device and method, and respiration impedance display method
  • Respiration impedance measuring device and method, and respiration impedance display method
  • Respiration impedance measuring device and method, and respiration impedance display method

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Embodiment Construction

[0058] Hereinafter, embodiments of the respiratory impedance measuring device and its measuring method according to the present invention will be described with reference to the drawings. figure 1 The structure diagram of the embodiment of the respiratory impedance measuring device related to the present invention is shown in the figure. The main structural elements of the respiratory impedance measuring device are: a tube 11, the front end of which is installed in the oral cavity of a person, and the respiratory flow flows through; the pressure sensor 12 constitutes a pressure detection unit installed in the tube 11 and detecting the pressure in the oral cavity; The flow sensor 13 constitutes a flow detection unit for detecting the respiratory flow at the same position as the pressure sensor 12 ; the speaker 21 constitutes a pressurizing unit for applying air vibration pressure to the oral cavity; and the computer 30 .

[0059] The output signal of the pressure sensor 12 is a...

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PUM

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Abstract

A respiration impedance can be continuously measured with very high accuracy by removing the noise. A loudspeaker (21) applies an air vibration pressure to the mouth cavity by an oscillation wave produced by frequency-interval thinning so that different frequencies of the oscillation wave are thinned and the oscillation wave has only the remaining frequency components. The pressure in the mouth cavity is detected to determine the flow rate of respiration. A Fourier-transforming means (32) Fourier-transforms the obtained signal to obtain the spectrum. An extracting means (33) determines the respiration high-frequency component contributing as noise from the spectrum corresponding to the frequency components removed by the frequency-interval thinning, subtracting the respiration high-frequency component from the spectrum corresponding to the remaining frequency components, and thus extracting the oscillation wave component. A computing means (34) divides the pressure component by the flow rate component for each frequency with respect to the extraction result.

Description

technical field [0001] The present invention relates to a respiratory impedance measuring device capable of continuously measuring respiratory impedance of a human being, a measurement method thereof, and a respiratory impedance display method. Background technique [0002] In the past, this device is known to have: a sine wave pressurizing device for applying a sine wave air vibration pressure to the respirator system; an airflow velocity detector for detecting the airflow velocity of the respirator system; an air pressure detector for detecting the air pressure of the respirator system; and the resistance calculation unit, which calculates the breathing resistance based on the air flow velocity and air pressure detected by the air flow velocity detector and the air pressure detector. [0003] The above-mentioned conventional device is configured as follows: a reference signal converter for converting the signal of the sine wave air vibration pressure applied by the sine wa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/085A61B10/00
CPCA61B5/742A61B5/7257A61B5/085
Inventor 黑泽一清水芳雄保木敏明
Owner 捷斯特公司
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