Volume control device and breathing machine

Abstract

A volume control device comprises a first cylinder, a second cylinder, a first piston, a second piston, a first linear screw, a second linear screw, a driving linear screw, a driving motor and a control unit. The first piston is arranged on the first cylinder in an airtight mode, a first one-way check valve and a second one-way check valve are arranged on the first cylinder, the second piston is arranged on the second cylinder in an airtight mode, a third one-way check valve and a fourth one-way check valve are arranged on the second cylinder, the first linear screw is connected with the first piston, the second linear screw is connected with the second piston, the first linear screw is meshed with the driving linear screw in the forward direction, the second linear screw is meshed with the driving linear screw in the reversed direction, the driving motor drives the linear screw to rotate and drives the linear motion of the first linear screw and the second linear screw in the opposite directions simultaneously, so that volume variation of the first cylinder and the second cylinder is the same. A breathing machine comprises the volume control device. The volume control device can greatly improve the control precision of the breathing machine for controlling a small amount of air and even a trace of air.

Description

technical field [0001] The invention relates to the field of medical equipment, in particular to a volume control device and a ventilator. Background technique [0002] As a means of treatment, mechanical ventilation, the volume of gas sent into the patient's body will directly lead to the effect of treatment, as well as the damage to the patient. In the field of children's breathing, tidal volume control is required to be very precise, especially in the respiratory treatment of newborns, because the heart and lungs of newborns are not fully developed, which is manifested in the poor compliance of the chest and lungs, and the insufficiency of the myocardium. The difference between the neonatal ventilator and the general ventilator is that the control accuracy of the four main parameters of tidal volume, pressure, flow and time is higher than that of the adult ventilator. The tidal volume as the main ventilation parameter directly affects the ventilation pressure. And affect...

AI Technical Summary

Problems solved by technology

[0003] The existing tidal volume control method is to adjust the flow through the valve, and then calculate the time integral of the flow. Not only the error is large, but also the cost is high, and the control process is complicated. Especially when it is applied to a pediatric ventilator, it is almost impossible to meet the control accuracy requirements. , prone to adverse consequences such as hypoventilation, overventilation, and lung pressure damage

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