Calculating method and device for tidal volume, storage medium and breathing machine

Abstract

The invention provides a calculating method for a tidal volume of a breathing machine. The method includes the following steps: step 1, acquiring instantaneous flow rate F at interval time <delta>t through a flow sensor at the end of the breathing machine, and performing median filtering on the instantaneous flow rate F; step 2, calculating difference F2 of the instantaneous flow rate F and baseline flow rate F1, wherein the baseline flow rate F1 is an average value of the instantaneous flow rate F in the period T; and step 3, performing integration on the flow rate F2 in an inspiratory phaseto obtain an inspiratory tidal volume Vi, and performing integration on the flow rate F2 in an expiratory phase to obtain an expiratory tidal volume Ve. According to the calculating method and devicefor the tidal volume of the breathing machine, a storage medium and the breathing machine provided by the invention, the tidal volume of a user during use of the breathing machine can be accurately calculated, so that the therapeutic effect can be improved.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a tidal volume calculation method, device, storage medium and ventilator of a ventilator. Background technique [0002] Ventilator is a device that can replace, control or change people's normal physiological breathing, increase lung ventilation, improve respiratory function, reduce respiratory function consumption, and save heart reserve capacity. It continuously provides oxygen to users through a given pressure. , so as to improve the hypoxia problem of users during sleep. Tidal volume (TV) refers to the volume of air inhaled or exhaled each time when breathing calmly. It is related to age, gender, volume surface, breathing habits, and body metabolism. [0003] At present, the working modes of the ventilator mainly include the pressure control ventilation mode and the volume control ventilation mode. The difference between the positive pressure and the inspiratory ti...

AI Technical Summary

Problems solved by technology

During the use of the ventilator, there will inevitably be intentional air leakage such as the air outlet at the mask end, and unintentional air leakage such as a loose mask, which will lead to distortion of the tidal volume calculation, thus making the therapeutic effect of the ventilator unsatisfactory

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