Device for ensuring constant air leakage of noninvasive ventilation loop

Abstract

The invention relates to the field of auxiliary medical instruments, and particularly relates to a device for ensuring constant air leakage of a noninvasive ventilation loop. The device comprises an air leakage assembly and a ventilation pipeline vertically communicating with the air leakage assembly, wherein an air leakage port is formed in the upper end of the air leakage assembly; a limiting part is arranged on the inner wall of the air leakage assembly; a movable space is defined by the part, close to the air leakage port, of the air leakage assembly and the limiting part; and a pumping part extending outwards through the air leakage port is arranged in the movable space. During noninvasive ventilation, the ventilation loop keeps constant air leakage under different inspiration pressures and expiration pressures, man-machine synchronism can be improved, and dyspnea of a patient can be relieved.

Description

technical field [0001] The invention relates to the field of auxiliary medical devices, in particular to a device for ensuring constant air leakage in a non-invasive ventilation circuit. Background technique [0002] Now, non-invasive ventilation has been widely used in the fields of acute and chronic respiratory failure, cardiac insufficiency and respiratory rehabilitation. Non-invasive ventilation provides inspiratory pressure and expiratory pressure. The inspiratory pressure helps the patient inhale, improves ventilation, reduces the work of the patient's respiratory muscles, and improves dyspnea; the expiratory pressure is conducive to overcoming the patient's endogenous end-expiratory pressure. Positive pressure ensures that the gas in the alveoli can be fully exhaled and reduces gas retention. When patients with chronic airway diseases are acutely exacerbated and airway resistance increases, respiratory muscles are prone to fatigue, and inspiratory support pressure ne...

AI Technical Summary

Problems solved by technology

[0005] Side hole valve: air leaks through a fixed-sized air leak hole. It is a disposable consumable. The air leakage is mainly related to the pipeline pressure. The higher the pressure, the greater the air leakage; affect the patient's rest

[0006] Silent valve: The working principle of the silent valve is the same as that of the side hole valve. Because the air leakage area of ​​the silent valve increases, although the volume of the air leakage is reduced, the amount of air leakage increases accordingly

[0007] Platform valve: It is mainly composed of a valve body, a silicone membrane and a bonnet. The air leakage of this device has nothing to do with the pressure in the pipeline, that is, the air leakage is kept constant; but the elasticity of the silicone membrane will decrease after a long time of use. Aging phenomena such as adhesion will affect the air leakage effect

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