Exhalation valve control method, device, computer equipment and storage medium

Abstract

The embodiment of the invention discloses a control method, device, computer equipment and storage medium of an exhalation valve. The control method of the exhalation valve in the present invention includes: obtaining the current airway pressure and the preset airway pressure; calculating the pressure error according to the current airway pressure and the preset airway pressure; calculating the pressure error Perform an update to obtain an update error, the update error is greater than the pressure error; obtain a preset ventilator model; determine the target control increment of the exhalation valve according to the update error and the preset ventilator model , so that the exhalation valve controls gas discharge according to the target control increment. It can be seen that the update error amplifies the pressure error and increases the control strength of the ventilator system in too many stages, which can not only make the performance of the transition section more superior and quickly enter the breathing maintenance stage, but also eliminate the small steady state or The static pressure error makes the performance of the breathing maintenance segment more stable.

Description

technical field [0001] The present invention relates to the technical field of exhalation valve control, in particular to a control method, device, computer equipment and storage medium for an exhalation valve. Background technique [0002] In modern clinical medicine, the ventilator, as an effective means of artificially replacing the spontaneous ventilation function, has been widely used in respiratory failure caused by various reasons, anesthesia respiratory management during major surgery, respiratory support treatment and emergency resuscitation. It occupies a very important position in the field of modern medicine. In the control of the ventilator, it is necessary to perform pressure-controlled ventilation for some special patients. Such as figure 1 As shown, the air-oxygen mixture 1 enters the patient's lungs 3 through the exhalation valve 2 of the ventilator, and then the exhalation valve 4 of the ventilator discharges the waste gas 5 after gas exchange through the...

AI Technical Summary

Problems solved by technology

[0003] In the current ventilator pressure control method, there is a method that first opens the exhalation valve to the maximum after exhalation begins, and then sets the valve closing condition, which will cause pressure overshoot (such as figure 2 shown) or the pressure takes too long to reach positive end-expiratory pressure (such as image 3 shown), that is, the time from the respiratory transition phase to the respiratory maintenance phase is longer

Another method is to use the inspiratory valve and the exhalation valve to work together to complete the pressure establishment and pressure balance under the pressure control of the ventilator. This method can well control the required pressure in terms of improving patient comfort. However, when positive end-expiratory pressure is established, the establishment time of positive end-expiratory pressure is relatively long, that is, it takes a long time to enter the respiratory maintenance phase, and it is easy to cause control coupling problems. When the control effect is not good, it is difficult to determine whether it is respiratory Air valve or exhalation valve problem

Images