Expiration control method

Abstract

The invention relates to an expiration control method. The expiration control method comprises the steps of calculating pulmonary gas volume Vp corresponding to required expiration positive end-expiratory pressure, calculating the pulmonary total amount Vi of patients in the inspiratory stage, and monitoring the exhaling gas amount Vo in a real time manner in the expiration stage; and when the pulmonary surplus gas volume Vi-Vo is smaller than or equal to Vp, closing an expiration valve. The method also comprises the steps of calculating pulmonary gas volume Vp corresponding to required expiration positive end-expiratory pressure, calculating the pulmonary total amount Vi of patients in the inspiratory stage, monitoring the exhaling gas amount Vo in a real time manner in the expiration stage, and if the expiration valve is closed immediately, predicting the amount of V1 of expiration gas in the closing process of the expiration valve; and when the pulmonary surplus gas volume Vi-Vo is smaller than or equal to Vp+Vl, closing the expiration valve. According to the expiration control method, under the premise that the expiration positive end-expiratory pressure is maintained, the expiratory resistance is reduced, and the purpose of quick and smooth expiration can be achieved.

Description

technical field [0001] The invention belongs to the technical field of medical and health care, and in particular relates to a breath control method. Background technique [0002] Controlling or assisting patient ventilation through medical equipment is a very important treatment in clinical practice. For critically ill patients, controlled / assisted ventilation by medical equipment is often a necessary life-saving treatment, such as patients with respiratory failure, patients receiving general anesthesia, etc. [0003] Medical devices that control / assist patient ventilation include positive pressure ventilators, negative pressure ventilators, and alternating positive and negative pressure breathing equipment. The modern ventilator was invented at the beginning of the last century and has become the most important tool in the field of respiratory therapy and critical care. According to statistics, the total number of therapeutic ventilators in China reached 625,000 in 2015,...

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the exhalation valve will generate a force on the patient's exhalation airflow during the entire exhalation phase, forming a relatively large exhalation resistance, making the patient's exhalation unobstructed.

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