Control method of flow velocity waveforms of ventilator based on SIMV ventilation mode

Abstract

The invention discloses a control method of flow velocity waveforms of a ventilator based on a SIMV ventilation mode. The control method comprises steps of opening the ventilator, setting the ventilator to the SIMV ventilation mode; firstly setting tidal volume, respiratory frequency, peak flow velocity and inhalation pause time, controlling the ventilator to output flow velocity waveforms according to the formula by a controller; controlling a gas flow valve to output gas at peak flow velocity by the controller, and then controlling the gas flow valve to convey the gas at linearly decreasingflow velocity of gas by the controller, stopping inhalation by an inhalation valve when the gas flow valve conveys the gas at 1 / 3 of peak flow velocity; opening an exhalation valve after a period of inhalation pause time, correspondingly controlling opening time of the expiration valve based on inhalation-exhalation ratio by the controlling; closing the exhalation valve to complete ventilation action in one inhalation-exhalation cycle of the ventilator, and repeating the steps to enable the inhalation valve, the gas flow valve and the exhalation valve to form a cycle operation. The control method of the invention effectively reduces the potential side effects and risks of traditional ventilators during use.

Description

Technical field: [0001] The invention relates to the technical field of medical equipment, in particular to a control method based on the flow velocity waveform of a ventilator in SIMV ventilation mode. Background technique: [0002] With the rapid development of critical illness and emergency medicine, people are more and more aware that ventilator is an indispensable instrument and equipment for rescue and comprehensive treatment of various critical illnesses, and ventilator treatment technology is the key to the success of rescue. Some patients will be in a coma after surgery. At this time, the patient cannot breathe spontaneously, and a ventilator is usually used to assist breathing. while PCO 2 (partial pressure of carbon dioxide) is an important indicator of respiratory acid-base balance disorders; the level of partial pressure of carbon dioxide is directly regulated by respiration, and its value affects the pH value of blood. Therefore, the measurement of partial pre...

AI Technical Summary

Problems solved by technology

However, in the SIMV volume control ventilation mode of the traditional ventilator, the waveform and parameter design of the flow (Flow) and time (T) of the ventilator, although the ventilator can realize the ventilator to assist breathing, but its corresponding effect on the control of the partial pressure of carbon dioxide in the human body is not good. Ideal, not adaptively lowering the patient's partial pressure of carbon dioxide

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