Method for controlling tidal volume of anaesthesia machine by adjusting volume and pressure

Abstract

The invention discloses a method for controlling the tidal volume of an anaesthesia machine by adjusting the volume and pressure. The method comprises the steps that pipeline compliance self-checking is carried out on the anaesthesia machine and a breathing machine in the starting process; when breathing control is started and the R and C values of a patient are not correctly monitored, a volume ventilation mode is adopted, and the R and C values of the patient in the ventilation period are monitored; if the R and C values of the patient are correctly monitored, a compliance compensation volume ensuring method is utilized for monitoring the inhalation volume of the patient in the inhalation period, and volume ensuring treatment is carried out after the volume reaches a set value; a system standard control pressure value P is calculated, inhalation valve and exhalation valve collaborative pressure control is carried out according to the value P, the tidal volume, volume difference value and pressure difference value deltaP of the patient are calculated in the exhalation stage, feedback compensation control is carried out on the calculated value P according to deltaP, and the volume and the pressure are both ensured.

Description

technical field [0001] The invention relates to an anesthesia machine and a breathing ventilation guarantee method, which is used to improve the problem of barotrauma caused by too large R value and too small C value under the capacity control of the anesthesia machine and ventilator, and to increase the pressure under volume ventilation. The invention relates to restricted safety, which belongs to the technical field of medical equipment manufacturing. Background technique [0002] At present, volume control or pressure control is mostly used in anesthesia machine and ventilator control. Usually, these two control methods can only correspond to special patient groups: [0003] The advantage of volume control is that it can set the tidal volume according to the doctor, and provide the patient with the specified volume of ventilation at regular intervals. The ventilation accuracy is high, and the tidal volume supplied each time is almost the same. The disadvantage is that t...

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Problems solved by technology

However, this method also has certain defects. It adopts the method of adjusting the pressure according to the fixed value to ensure the control of the capacity. Each adjustment is realized with a fixed value of ±5cmH2O, which leads to a relatively large deviation in the capacity, and it is necessary to achieve the preset tidal volume. It takes 5 to 10 cycles or more to achieve, and the adjustment speed is too slow

[0006] The defects in the above methods will directly affect the control performance and control response speed of the anesthesia machine and ventilator, resulting in a decrease in the comfort of the anesthesia machine and ventilator

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