Respiratory frequency measuring method and device and HFNC equipment

Abstract

The embodiment of the invention discloses a respiratory frequency measuring method and device and HFNC equipment. The method comprises the steps: obtaining a corresponding flow and pressure amplitude-frequency curve graph according to collected flow and pressure data, obtaining a first maximum amplitude value and corresponding first initial respiratory rate data based on the flow amplitude-frequency curve graph, and obtaining a second maximum amplitude value and corresponding second initial respiratory frequency data through the pressure amplitude-frequency curve graph; calculating a first window value according to first initial respiratory frequency, calculating a second window value according to second initial respiratory frequency, and searching an actual flow peak-to-peak value set in a flow waveform curve graph generated by flow data by a window method; and according to the actual pressure peak value set in a pressure waveform curve graph generated by the pressure data, obtaining actual respiratory frequency data. Therefore, the problem of loss or over-extraction of the peak-to-peak value in the process of searching the peak-to-peak value can be reduced, and accurate respiratory rate data can be obtained.

Description

technical field [0001] The invention relates to the technical field of medical equipment, in particular to a method and device for measuring respiratory frequency and HFNC equipment. Background technique [0002] Respiratory failure refers to severe impairment of pulmonary ventilation and / or ventilation function caused by various reasons, unable to maintain sufficient gas exchange in a resting state, resulting in hypoxemia with / without hypercapnia, and then causing a series of Pathophysiological changes and syndromes in response to clinical manifestations. Severe impairment of pulmonary ventilation and / or ventilation function will cause respiratory failure in a short period of time, and the body cannot quickly compensate for metabolism. If not rescued in time, it will bring great pain to the patient and even endanger the patient's life. High-Flor Nasal Cannula Oxygen Therapy (HFNC for short) technology is a treatment that continuously provides patients with high-flow inhale...

AI Technical Summary

Problems solved by technology

[0003] The current HFNC equipment mainly works according to the set oxygen concentration, flow and temperature values, and detects blood oxygen data at the same time. There are few HFNC equipment that can support the respiratory frequency measurement function, and usually use flow feedback for steady flow processing. According to the waveform change curve of the flow rate and pressure when the patient breathes, the peak-to-peak value in the curve is obtained, and then the respiratory frequency data is calculated. However, if the gas output hole on the patient interface is small or the preset flow rate is too large, the background pressure will be relatively high. If the signal-to-noise ratio of the breath and pressure waveform is very low when the patient's breathing is weak and the tidal volume is low, it may lead to peak-to-peak loss or over-extraction in the process of finding the peak-to-peak value. The accuracy of the acquired respiratory rate data cannot be effectively guaranteed

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