Noninvasive ventilation nasal/mask trigger device with function of guaranteeing pressure trigger sensitivity

Abstract

The invention discloses a noninvasive ventilation nasal / mask trigger device with a function of guaranteeing pressure trigger sensitivity. The noninvasive ventilation nasal / mask trigger device comprises a pressure trigger mechanism which is closed and a pressure signal conduction mechanism; the pressure trigger mechanism is used for detecting pressure changes; the pressure signal conduction mechanism is connected with the pressure trigger mechanism; the pressure trigger mechanism comprises a pressure sensor or comprises a pressure trigger seat, a fastener and a sensing film; the pressure sensor is capable of converting surface pressure into electrical signals; the pressure trigger seat is fixedly embedded on a cover; the fastener is used for positioning the pressure trigger seat onto the cover; the sensing film fixed between the pressure trigger seat and the fastener is used for sensing the pressure changes; a cavity is formed among the pressure trigger seat, the fastener and the sensing film; the cavity is isolated from a chamber in the cover through the sensing film; the pressure signal conduction mechanism extends into the cavity of the pressure trigger mechanism and transmits transient pressure changes, sensed by the sensing film, of the chamber of the cover to a detector disposed in an noninvasive respirator.

Description

Technical field: [0001] The invention relates to the technical field of medical devices, in particular to a trigger device for a non-invasive ventilation nose or mask that ensures pressure trigger sensitivity. Background technique: [0002] Respiratory failure caused by various etiologies requires assisted mechanical ventilation to maintain the patient's vital signs and provide sufficient time for the treatment of the etiology. Assisted mechanical ventilation includes non-invasive mechanical ventilation and invasive mechanical ventilation. Non-invasive mechanical ventilation can avoid invasive mechanical ventilation or shorten the time of invasive mechanical ventilation. [0003] Whether the non-invasive mechanical ventilation can be carried out smoothly is related to the synchronization between man and machine, that is, the breathing cycle of the ventilator (inhalation start time and inhalation-exhalation switching time) and the assistance intensity are best related to the ...

AI Technical Summary

Problems solved by technology

During non-invasive mechanical ventilation, the delivered gas must be humidified and heated, so that the humidified gas can enter the small tube and condensate will appear. With the increase of condensed water, the sensitivity of the small tube to transmit pressure will gradually decrease. It can't even transmit the pressure change, and the man-machine is out of sync

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