Device for controlling airflow of respirator

Abstract

The invention discloses a method for controlling the airflow of a respirator. The method comprises the following steps of: introducing continuous airflow with a stable flow rate into a respirator system through an air source; and dynamically adjusting ventilation rhythm and ventilation strength in an air passage by controlling the valve movement frequency and distance of an airflow outlet end so as to support the respiration of a patient. In the method, a command ventilation mode and an autonomous respiration operating mode are utilized; if respiration is stopped in the autonomous respiration mode, autonomous respiration can be maintained in a mode of reducing target tidal volume; and the respiration is still stopped when the tidal volume is reduced to a preset value, so that central pathological changes are determined, and the autonomous respiration operating mode is converted into the command ventilation operating mode. The invention also discloses a device for controlling the airflow of the respirator. In the method and the device, an independent and integral respirator system which completely uses positive pressure switching ventilation of the air passage as a technical basis is formed by a series of matched regulation modes such as a target tidal volume automatic regulation mode, the autonomous respiration mode, the command ventilation operating mode, a respiration pause automatic processing mode and the like.

Description

technical field [0001] The invention relates to an artificial ventilator, in particular to a continuous air flow control method and a control device of the ventilator. Background technique [0002] A ventilator is a critical life support device that provides ventilation and oxygenation support to patients with respiratory failure. At present, the work of mainstream ventilators adopts simulated breathing action, that is to say, relying on the ventilator to perform periodic positive pressure airflow perfusion to the patient's airway to provide breathing power support for the filling of the lungs. As far as ventilator technology is concerned, in order to improve the quality of respiratory support, it is necessary to reduce the airway pressure and breathing work consumption during respiratory support as much as possible, and it is necessary to improve the synchronization and coordination between the work of the ventilator and the patient's spontaneous breathing. Although modern...

AI Technical Summary

Problems solved by technology

[0006] Whether it is volume-type ventilation or pressure-type ventilation, the ventilation effect depends on the interaction between positive pressure airflow and airway conditions. The generation and output of positive pressure airflow are periodic. It is difficult to completely avoid the mismatch between the patient's airway condition and inspiratory needs during the

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