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Respiratory signal determination algorithm for positive pressure ventilation therapeutic machine

A technology of positive pressure ventilation and breathing signals, which is applied in the direction of respirators, calculations, and special data processing applications. It can solve the problems of basic airflow measurement, such as the delay of breath/breath judgment, and achieve the effect of simple algorithm and fast response speed.

Inactive Publication Date: 2017-08-11
沈阳海龟医疗科技有限公司
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Problems solved by technology

[0003] Most of the existing respiratory signal detection methods are based on the basic airflow in the air circuit (that is, the flow in the air circuit when the patient wears the mask without exhalation / inhalation behavior), so when the basic airflow measurement is inaccurate or the inspiratory When the instantaneous flow rate of gas generation is lower than the basic flow rate, it will cause a delay in the determination of exhalation / breathing

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  • Respiratory signal determination algorithm for positive pressure ventilation therapeutic machine
  • Respiratory signal determination algorithm for positive pressure ventilation therapeutic machine
  • Respiratory signal determination algorithm for positive pressure ventilation therapeutic machine

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Embodiment Construction

[0028] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0029] Such as figure 1 Shown is the flow chart of the method of the present invention. When the patient is not breathing, the airflow in the gas path is a constant airflow (constant flow rate). When the patient inhales, the flow in the gas path changes, and when the flow change is greater than the inspiratory threshold Threshold within a certain period of time In , the system determines that the patient has an inhalation action, and the pressure of the ventilator changes from the expiratory pressure to the inspiratory pressure. At this time, the ventilator starts to record the inspiratory time and inspiratory tidal volume. Inspiratory threshold Threshold In Different values ​​are preset for the patient to choose. For the patient this is the inspiratory trigger sensitivity. Users can obtain the inspiratory threshold Threshold they need a...

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Abstract

The invention relates to a respiratory signal determination algorithm for a positive pressure ventilation therapeutic machine. The determination algorithm comprises the following steps: collecting flow data of the positive pressure ventilation therapeutic machine by virtue of an MCU (micro-programmed control unit) in accordance with a recurrence method, and calculating a gas flow variation; and in accordance with a current respiratory state of a patient, regulating a pressure state of the respiratory machine (the positive pressure ventilation therapeutic machine). The determination algorithm, which is free from influence of a basic airflow, can conduct accurate respiratory signal determination even when measurement on the basic airflow is inaccurate; the algorithm is simple and high in response speed; and a determination threshold is adjustable, so that the most appropriate parameters can be obtained when the therapeutic machine is applied to different patients.

Description

technical field [0001] The invention relates to the field of non-invasive ventilators, in particular to a respiratory signal determination algorithm for positive pressure ventilation therapy machines. Background technique [0002] With the development of non-invasive ventilator technology, the comfort of patients during use has become an important indicator to measure product quality. Due to the different pressures of the inspiratory and expiratory phases of the bi-level non-invasive ventilator, it can ensure that the patient can obtain sufficient air volume when inhaling, and only need to use a small therapeutic pressure when breathing to achieve the therapeutic effect, which greatly improves the patient's Comfort during use of the ventilator. Only when the pressure switching of the bi-level non-invasive ventilator is synchronized with the breathing height of the patient can the patient obtain a high degree of comfort. Therefore, it is particularly important to detect the...

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Application Information

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IPC IPC(8): A61M16/00G06F19/00
Inventor 杨吉朱昱王文彬
Owner 沈阳海龟医疗科技有限公司
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