Respirator

Abstract

The invention provides a respirator and a ventilation mode thereof. The respirator comprises a pressure stabilizing valve, an inhalation valve, a flow sensor, an inhalation end pressure sensor 6, an exhalation safety valve 8, a negative pressure device 17, an exhalation switching valve 16, an exhalation valve 15 and a respirator control system. In the inhalation period, the respirator controls the inhalation valve to send air to a patient based on user set parameters and patient signals monitored by the flow sensor, the inhalation end pressure sensor 6 and the exhalation end pressure sensor 19. In the exhalation period, the respirator overcomes resistance generated by an air way and a respiration pipeline when the patient exhales through negative pressure suction output by the negative pressure device 17. Furthermore, the respirator can enable the patient to inhale air with the volume 1.1-2 times of the normal tidal volume, when the patient exhales, the negative pressure device 17 of the respirator is started, the exhalation flow speed of the patient instantly reaches the exhaust air flow speed of the patient in the physiological cough process, and the real physiological cough process of the patient is simulated. The purpose of discharging sputum accumulated in the air way of the patient is achieved.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to a ventilator and a ventilation method thereof. Background technique [0002] Respiratory support is one of the most critical means to save the lives of emergency and critically ill patients. Therefore, the ventilator has become an indispensable device in clinical treatment, and it is becoming more and more widely used in the fields of first aid, anesthesia, ICU and respiratory therapy. . Ventilator is a device that can replace, control or change people's normal physiological breathing, increase lung ventilation, improve respiratory function, reduce breathing work consumption, and save heart reserve capacity. The principle of inhalation of ventilators currently on the market is to directly pressurize the respiratory tract, apply positive pressure directly with gas, and generate a pressure difference exceeding the alveolar pressure, and the gas enters the lungs → inhale; and exhalat...

AI Technical Summary

Problems solved by technology

[0003] The disadvantage of the existing technical solutions is that the exhalation process is uncontrolled, and whether the exhalation is smooth or not depends on the patient's airway resistance, the elasticity of the thorax and lungs, the resistance of the breathing pipeline and the exhalation valve

If you encounter a patient with large airway resistance and poor chest and lung elasticity, or the exhalation valve of the ventilator itself has a large expiratory resistance due to improper design or use, using the ventilator under such circumstances will cause the patient to exhale If the time is too long, or the breathing is not smooth, it will affect the effect of ventilator treatment

In case of patients with a lot of sputum, it is necessary to frequently use the sputum suction machine to suck the sputum, which will affect the therapeutic effect of the ventilator

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