A method for judging obstructive apnea of ​​non-invasive ventilator

Abstract

The invention discloses an obstructive apnea judgment method of a non-invasive ventilator. The obstructive apnea judgment method comprises: acquiring the steady state flow respiration waveform characteristic data of a person to be detected; monitoring whether the person to be detected has apnea or not; when monitoring that the person to be detected has the apnea, driving a draught fan to simulate steady state rotation; acquiring simulated state flow waveform characteristic data and judging whether a difference value between the simulated state flow waveform characteristic data and the steady state flow respiration waveform characteristic data is larger than a pre-set value or not; if so, considering that the person has obstructive apnea. According to the obstructive apnea judgment method, flow change caused by an air leaking hole is very small, so that the judgment of the difference value can clearly distinguish whether the flow change is caused by air leaking or the flow change is caused by an open airway, and furthermore, the problem that the non-invasive ventilator difficultly judges whether the apnea is the obstructive apnea can be effectively solved.

Description

technical field [0001] The invention relates to the technical field of medical devices, and more specifically relates to a method for judging obstructive apnea of ​​a noninvasive ventilator. Background technique [0002] When the non-invasive ventilator detects that the patient has apnea, it further detects which type of apnea the patient belongs to, and focuses on detecting whether the patient has obstructive apnea. [0003] Common non-invasive ventilators in the prior art mainly use the following two methods to check whether obstructive apnea occurs. The first is to send an oscillating wave with a frequency of 4 Hz and an amplitude of 1 cm water column to the mask after the apnea airflow stops for 4 seconds. and monitor the airflow feedback signal. According to the airflow feedback signal, it is judged whether the upper airway is open or closed. The second is to send a detection pulse when the patient is apnea, and then analyze the flow change caused by the pulse, and dist...

AI Technical Summary

Problems solved by technology

Non-invasive ventilators also have active leak holes, and the flow rate will definitely change after the pressure changes. To distinguish whether the gas goes out from the active leak hole or enters the human body, a more complex judgment algorithm is required, and the accuracy is also critical. Difficult to be guaranteed

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