Respirator

Abstract

The invention provides a ventilator and a ventilation method thereof. The ventilator includes 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 ventilator control system. In the inspiratory cycle, the ventilator controls the inspiratory valve to deliver air to the patient based on the parameters set by the user and the patient signals monitored by the flow sensor, inspiratory end pressure sensor 6, and exhalation end pressure sensor 19; in the exhalation cycle, the ventilator Suction with the negative pressure output by the negative pressure device 17 overcomes the resistance produced by the airway and the breathing tube when the patient exhales. Furthermore, the ventilator can also inhale 1.1-2 times the normal tidal volume to the patient. When the patient exhales, the ventilator activates the negative pressure device 17, so that the patient's expiratory flow rate instantly reaches the exhaust flow rate of the patient's physiological coughing process. Simulate the real physiological cough process of the patient. By simulating the patient's physiological cough process, the purpose of discharging sputum accumulated in the patient's airway 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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