Small tidal volume ventilation control method of anesthesia machine or respirator

Abstract

The invention discloses a small tidal volume ventilation control method of an anesthesia machine or a respirator. The method includes the steps of S10, entering a small tidal volume ventilation control mode, and by a control unit, controlling the inhalation valve of the anesthesia machine or the respirator to inhale; S20, controlling a sensor to detect a tidal volume value by the control unit, and feeding the value back to the control unit; S30, by a judging unit, judging whether the tidal volume value fed back is larger than a preset value VT0, and if so, executing the step S40, or else, executing the step S20; S40, by the judging unit, judging whether the inhalation valve reaches the minimum openness of not, and if not, executing the step S50, or else, executing the step S60; S50, by the control unit, controlling to reduce the openness of the inhalation valve, and then executing the step S20; S60, by the control unit, controlling and adjusting the openness of the inhalation valve to allow the inhalation valve to generate air overflow during inhalation, and then executing the step S20.

Description

technical field [0001] The invention relates to the field of medical equipment, and more specifically, to a small tidal volume ventilation control method for an anesthesia machine or a ventilator. Background technique [0002] In the product design of ventilators and anesthesia machines, in order to realize the function of mechanical ventilation, it is necessary to control the volume of gas inhaled or exhaled by the patient during each breath, that is, the tidal volume. The amount of gas inhaled by adults is about 500-600 milliliters per breath, the amount of gas inhaled by children is about 300 milliliters per breath, and the amount of gas inhaled by newborns is about tens of milliliters per breath, that is, 100 milliliters Within, the tidal volume when the child or newborn breathes is called the small tidal volume. For the control of medium or large tidal volumes, the precision requirements are often low, while for the machinery mainly used in pediatric patients, it is ne...

AI Technical Summary

Problems solved by technology

However, this method requires the addition of other devices, such as a pressure reducing valve connected to the gas source to adjust the pressure of the gas output from the gas source; a pressure sensor connected to the gas delivery channel downstream of the pressure reducing valve, It is used to detect the output pressure of the pressure reducing valve; the flow control valve installed in the gas transmission path downstream of the pressure sensor controls the flow of gas by adjusting the opening of the valve according to the output pressure

Therefore, adopting this control method will increase a lot of cost, and the structure is complicated, and the control process is troublesome.

Images