A device for evaluating respiratory airflow stimuli during airway reopening

Abstract

The invention provides a method for evaluating a respiratory airflow stimulating factor during reopening of an air passage. The method can be applied to electrostimulation and respirator triggering methods for treating SAHS (Sleep Apnea Hypopnea Syndrome) patients and can also be applied to some sleep intervention methods for treating SAHS, for example adjustment on trigger points of sleep postures with pillows. The method comprises the following steps: S1. separately acquiring a breast band signal Tho and an abdominal band signal Abd of a respiration event during the reopening of the air passage, so as to calculate a pulmonary volume change; S2. calculating a pulmonary negative pressure change by using the pulmonary volume change; evaluating negative-pressure factor stimulation by using the pulmonary negative pressure change; S3. acquiring a blood oxygen signal of the respiration event during the reopening of the air passage, and calculating a blood oxygen lowering maximum value and a maximum lowering speed, so as to evaluate chemical factor stimulation; S4. evaluating the size of the respiratory airflow stimulating factor required during the reopening of the air passage by using the negative-pressure factor stimulation and the chemical factor stimulation as joint stimulating factors.

Description

technical field [0001] The invention relates to the field of medical devices, more specifically, to an evaluation device for stimulating factors of respiratory airflow when the airway is reopened. Background technique [0002] The incidence of sleep apnea hypopnea syndrome (Sleep Apnea Hypopnea Syndrome, SAHS) has gradually increased in recent years. Sleep apnea-hypopnea syndrome refers to patients with recurrent episodes of apnea more than 30 times during sleep every night or sleep apnea-hypopnea index (AHI)>=5 times / hour accompanied by clinical symptoms such as lethargy. The symptoms are divided into three types: central type (CSAS), obstructive type (OSAS) and mixed type (MSAS). Symptoms such as waking up, excessive sleepiness during the day, and destruction of sleep structure at night may also cause aggravation of pulmonary hypertension, cor pulmonale, respiratory failure, hypertension, arrhythmia, stroke and other diseases. SAHS has greatly affected the quality of ...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the defect that the titration method in the prior art cannot determine the size of the stimulus required for airway reopening, the present invention provides an evaluation device for stimulating factors of respiratory airflow when the airway is reopened. Negative pressure changes and extracting the maximum value of blood oxygen drop and the maximum rate of blood oxygen drop in the blood oxygen signal to evaluate negative pressure factor stimulation and chemical factor stimulation, so it is possible to substantially determine the size of the stimulus required for airway reopening

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