Stridor detection device and storage medium

Abstract

The present invention provides a stridor detection device, a stridor detection method, and a storage medium capable of easily detecting wheezing during severe asthma attacks, and wheezing in persons with a large body weight or BMI. A stridor detection device (1) includes a breathing volume deriving unit (43) for deriving the breathing volume of the subject based on the sound measured by the first sound measuring device (M1) for measuring the lung sound of the subject and a stridor detection unit (44) that extracts a maximum point from the intensity distribution of each frequency of the sound, and detects stridor based on the information of the maximum point. When the breathing volume is outside the specific range, the stridor detection unit (44) sets the detection sensitivity of stridor to a higher value than when the breathing volume is within the specific range.

Description

technical field [0001] The present invention relates to a stridor detection device, a stridor detection method and a stridor detection program. Background technique [0002] A device capable of extracting lung sounds as electrical signals using a microphone is known (for example, refer to Patent Document 1 and Patent Document 2). Lung sounds are produced in the lungs and thorax along with the breathing movement, and all sounds that are normal or abnormal are excluded from the sound originating from the cardiovascular system. Lung sounds are classified into breath sounds, which are physiological sounds originating from air flow in the airway due to breathing, and additional sounds, which are abnormal sounds generated in pathological conditions such as stridor and pleural friction. [0003] Patent Document 1 describes a biological sound inspection apparatus capable of obtaining an index value appropriately reflecting the airway state. This biological sound inspection apparat...

AI Technical Summary

Problems solved by technology

[0009] In addition, if the asthma attack worsens, the breathing becomes short of breath, so the breathing volume becomes louder, making it difficult to detect wheezing

In addition, if the attack of asthma becomes severe to the degree of respiratory failure, the breathing becomes shallow and small, so the breath sounds and wheezing become small, and it is difficult to detect wheezing

[0010] In Patent Document 1, it is shown that the index value reflecting the state of the airway is corrected based on the sound volume, but it is not clear whether it is possible to detect stridor when the breathing volume is small or the breathing volume is large.

[0011] Patent Document 2 describes that several algorithms are stored in advance to derive measurement result information suitable for the measurement purpose, but the algorithm is not selected based on the breathing volume.

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