Pressure control device and pressure control method of respirator

Abstract

The invention discloses a pressure control device and a pressure control method of a respirator. The pressure control device comprises a flow control valve, a flow sensor 1, an exhalation control valve, a flow sensor 2, an inhalation valve, an exhalation valve, a pressure sensor 1, a pressure sensor 2, a safety valve and a microcomputer control unit. During inhalation of a patient, the flow control valve is opened, the exhalation valve is closed, and air is sent to the patient through the flow control valve; and during exhalation of the patient, the flow control valve is closed, the exhalation valve is opened, the air exhaled by the patient is discharged into atmosphere through the exhalation valve and the flow sensors. The pressure control method is as follows: control curves of the flow control valve and the exhalation valve are preset. When the respirator starts to work normally, the microcomputer control unit outputs a control signal to control the flow control valve through a flow control valve control circuit, and the microcomputer control unit outputs a control signal to control the exhalation valve through an exhalation valve control circuit.

Description

technical field [0001] The invention relates to a ventilator, in particular to a device and method steps for controlling the pressure of the ventilator. Background technique [0002] The ventilator is essentially a gas switch, and the control system completes the auxiliary ventilation function by controlling parameters such as the flow direction of the gas. Effective ventilation support and ventilation therapy for patients is the interaction of pressure, flow and volume during the ventilation process to achieve the basic requirements for maintaining arterial blood gas / blood pH; no barotrauma, volume injury and alveolar injury; the patient's breathing is asynchronous The situation is reduced to the minimum, the application of sedatives and muscle relaxants is reduced; the patient's respiratory muscles are properly rested and restored. Gas pressure control technology is the core issue of a ventilator. [0003] Pressure-controlled ventilation is used in anesthesia machines an...

AI Technical Summary

Problems solved by technology

The disadvantage of this control method is that the medical staff do not have sufficient understanding of the performance of the machine. If the inspiratory flow rate is preset too small or the inspiratory time is preset too short, the pressure has not reached the set pressure in one inspiratory cycle. level, the inspiratory action has been completed, thus failing to achieve the intended therapeutic purpose

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