Water level alarm device of breathing machine humidifying tank

Abstract

The invention discloses a water level alarm device of a breathing machine humidifying tank, and relates to the field of medical equipment. The alarm device comprises a collimating light emitting device which is arranged outside the humidifying tank, a first photo-sensor which is arranged at a first height-limiting part of the other side, relative to the tank body, of the collimating light emittingdevice, a second photo-sensor which is arranged at a second height-limiting part of the other side, relative to the tank body, of the collimating light emitting device, and an alarm unit which is connected to the first photo-sensor and the second photo-sensor, wherein the collimating light emitting device is configured to emit collimating light towards the first photo-sensor and the second photo-sensor; a vertical distance that the collimating light emitting device is kept away from the bottom of the humidifying tank is less than a vertical distance that the second height-limiting part is kept way from the bottom of the humidifying tank; and an incidence angle kept between emergent light of the collimating light emitting device and a liquid level in the tank body is greater than a full reflection angle between liquid in the tank body and an air interface. According to the alarm device, real-time alarm can be achieved, and medical accidents can be reduced; and meanwhile, the alarm device is low in cost and strong in portability.

Description

technical field [0001] The invention relates to the field of medical equipment, in particular to a water level alarm device for a humidification tank of a ventilator. Background technique [0002] The human airway has the function of heating and humidifying, but when critically ill patients are assisted by a ventilator, the original heating and humidifying function is deprived, and they must rely on the humidification tank of the ventilator to humidify the central compressed air and send it into the patient's airway . [0003] The ventilator humidification tank is an important part of the ventilator, which can adjust the humidity of the air entering the patient's respiratory system. The commonly used humidification tanks for ventilators in clinical practice only have water level marks on the tank body to indicate water injection, which requires medical staff to pay close attention to the water level. Too much water in the humidification tank will easily cause the water in ...

AI Technical Summary

Problems solved by technology

Too much water in the humidification tank will easily cause the water in the tank to flow into the airway along the ventilator pipeline, causing the patient to inhale and cause respiratory tract infection; while too little water in the tank will easily cause the patient's respiratory mucosa to dry out, and respiratory secretions are sticky and difficult to discharge

Therefore, frequent replacement of medical staff is required, and the operation is cumbersome, which increases the workload of medical staff, and sometimes occurs when the nurse is not present and the fluid is cut off, which affects the treatment.

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