Control method for single-breathing-cycle pressure-capacity double-control mode of breathing machine

Abstract

The invention discloses a control method for a single-breathing-cycle pressure-capacity double-control mode of a breathing machine, a simulation model comprises a ventilation control module, a conversion module and a simulation lung module, and the ventilation control module comprises a pressure control module and a capacity control module and is used for controlling output pressure and flow of the breathing machine. And the conversion module is used for detecting the output capacity and switching the pressure control mode to the capacity control mode when the real-time output capacity is greater than a set switching capacity value. The lung simulation module simulates parameters of the lung of the patient and finally outputs airway pressure, flow and real-time output capacity of the patient. Pressure control and volume control are switched in a single cycle according to the real-time inspiration amount of the patient, the requirements of the patient can be adjusted more quickly, control over the pressure and volume of the breathing machine is more flexible, meanwhile, the breathing work of the patient can be effectively reduced, the treatment comfort is improved, and the breathing machine is closer to clinic.

Description

technical field [0001] The invention belongs to the field of ventilator ventilation control, in particular to a control method for a single breathing cycle pressure-volume dual control mode of a ventilator. Background technique [0002] As an important medical device that can effectively replace or assist normal human physiological breathing, reduce artificial consumption in patients' breathing, increase pulmonary ventilation, and improve respiratory function, ventilators are widely used in clinical medicine, home health care, emergency rescue, etc. Because the stability, safety and reliability of the ventilator, and the accuracy of each control element are crucial to the respiratory treatment process, the research on ventilator ventilation control is a very important step in ventilator design. [0003] The respiratory system has the characteristics of non-linearity, time delay and large dynamic range of parameters. It is difficult to analyze and study the closed-loop contr...

AI Technical Summary

Problems solved by technology

The control ventilation methods mentioned above are all single control or ventilation control in different breathing cycles. Even in the mixed ventilation mode, it is difficult to switch between pressure control and volume control in the same breathing cycle, which makes the ventilation of the ventilator There is a certain time delay in the ventilation control, and the ventilation control cannot be adjusted in time according to the change of the patient's tidal volume, which increases the patient's work of breathing and reduces the patient's comfort

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