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A method for detecting apnea

A technology of apnea and ventilator, which is applied in diagnostic recording/measurement, medical science, diagnosis, etc. It can solve problems such as misjudgment, poor accuracy, and inability to treat apnea, and achieve accurate detection results, reasonable calculation methods, good effect

Active Publication Date: 2019-09-20
广州和普乐健康科技有限公司
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Problems solved by technology

[0006] However, the existing ventilator products for the treatment of sleep apnea (SA) have relatively simple detection methods for apnea, which cannot detect apnea events well, and often cause misjudgment, so that the type of apnea cannot be targeted in time. Reasonable treatment, less precision

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  • A method for detecting apnea

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Embodiment

[0034] One of the implementations of a method for detecting apnea of ​​the present invention, such as figure 1 shown, including the following steps:

[0035] Step 1. Collect the flow rate at the mask end of the ventilator and perform deburring filtering on it. Generally, the data collected directly from the sensor will have glitches. If the data is directly calculated, there may be certain errors. After filtering the data, a smoother relationship curve can be obtained. The processed traffic is X n , n is a natural number;

[0036] Step 2, use FIR filter to X n Perform low-pass filter processing, the FIR filter can be used as an FIR filter with a cut-off frequency of 20Hz, and then obtain the filtered respiratory signal s(n), the specific calculation formula is:

[0037] a is a preset filter coefficient, and the value of filter coefficient a can be set to 0.12;

[0038] Step 3, calculate the respiratory flow change index RI(n), the specific calculation method is as follo...

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Abstract

The invention relates to the technical field of medical breathing devices, in particular to an apnea detecting method. The apnea detecting method comprises the following steps that 1, flow at a breathing machine mask end is acquired, and deburring and filtering processing is conducted on the flow; 2, an FIR filter is adopted to conduct lowpass filtering processing on the flow obtained after processing, and a breathing signal produced after filtering is obtained; 3, a breathing flow change index is calculated according to the breathing flow signal; 4, the breathing flow change index is compared with a preset apnea threshold value K1, and the breathing type is preliminarily judged, wherein a mainframe of a breathing machine sends detection waves, the breathing flow change index at the moment is obtained and the breathing flow change index is compared with a preset apnea threshold value K2 and the specific type of apnea is judged when the apnea lasts for 5 seconds. By the adoption of the detection method, the type of apnea can be accurately judged to facilitate next treatment performed according to the specific situation, and a treatment effect is good.

Description

technical field [0001] The invention relates to the technical field of medical breathing equipment, in particular to a method for detecting apnea. Background technique [0002] Sleep apnea (SA) is a breathing disorder characterized by repetitive complete or partial cessation of breathing (apnea and hypopnea, respectively) during sleep. Depending on the severity of the condition, the frequency of these events ranges from 5 to 100 per hour. As a result, patients exhibited poor sleep quality, daytime sleepiness, and poor cognitive performance. Sleep apnea can generally be identified as one of two types - obstructive sleep apnea (OSA) and central sleep apnea (CSA). The most common type of OSA has been observed to increase the risk of developing hypertension, heart failure (HF) and stroke by 3 to 4 times. Furthermore, patients with untreated sleep apnea consume up to twice as many healthcare resources for cardio-respiratory disease as subjects without the disease. On the othe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B5/00A61B5/087
Inventor 邝勇刘华东
Owner 广州和普乐健康科技有限公司
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