Control device and control method for basic flow of neonatal breathing machine

Abstract

The invention belongs to the technical field of neonatal breathing machines and basic flow control of the neonatal breathing machines, and particularly relates to a basic flow control device and method for a neonatal breathing machine, and the device comprises a target parameter setting module which is used for setting target airway pressure and target tidal volume required by the input breathing machine; the mixed air flow estimation module is used for estimating the minimum inspiration mixed air flow and the minimum expiration mixed air flow of the newborn breathing machine in the PCV mode based on pressure control according to the air capacitance and the air resistance which are obtained in advance, and the minimum inspiration mixed air flow and the minimum expiration mixed air flow serve as target mixed air flow of the PCV mode; the minimum inspiration mixed airflow and the minimum expiration mixed airflow of the neonatal breathing machine in the VCV mode based on capacity control are obtained and serve as target mixed airflow of the VCV mode; and the flow speed output module is used for outputting the target mixed airflow in the PCV mode and the target mixed airflow in the VCV mode according to the proportional valve at the air suction end, and taking the target mixed airflow and the target mixed airflow as corresponding basic flows.

Description

technical field [0001] The invention belongs to the technical field of neonatal ventilator and basal flow control of the neonatal ventilator, and in particular relates to a control device and control method for the basal flow of the neonatal ventilator. Background technique [0002] Neonatal ventilator is a medical device that provides respiratory support for neonatal patients. The tidal volume required by neonates is generally 10 to 50ml, and the respiratory rate is generally 40 to 60Hz. Compared with the tidal volume of 400 to 600ml for normal adults, 12 Respiratory frequency up to 20Hz, with the characteristics of low tidal volume and high frequency. Therefore, the respiratory rate required for a neonatal ventilator is 40 to 60 Hz. Since the tidal volume output by the ventilator must meet the above conditions, it is determined that the neonatal ventilator has higher control accuracy requirements for pressure, tidal volume and other targets than ordinary adult ventilators...

AI Technical Summary

Problems solved by technology

[0004] 1) When the user sets the base flow too high, most of the gas will leak through the IP valve at the exhalation end, resulting in a waste of gas, especially the waste of oxygen in the mixed gas, which increases the consumption speed of the gas source, which is uneconomical. increase costs;

[0005] 2) When the basic flow rate set by the user is small, the airway pressure and tidal volume may fail to reach or quickly reach the set value of the doctor's end due to insufficient flow rate, which directly affects the user experience;

[0006] 3) For the setting of the basic flow, the user needs to have considerable professional knowledge and understanding of the patient's condition, which will bring a lot of trouble to the user during actual use and reduce the user experience;

[0007] 4) Existing neonatal ventilators require the user to set a basic flow rate, based on which the airway pressure and respiratory tidal volume are controlled, and this setting item requires a high level of professional knowledge of the user. Once the user's basic flow setting is not appropriate , will lead to gas waste, and even serious situations such as insufficient inhalation of the patient

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