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首页> 外文期刊>Biomedical Engineering: Applications, Basis and Communications >A BREATHING SYNCHRONIZATION STRATEGY FOR THE NON-INVASIVE VENTILATOR SYSTEM
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A BREATHING SYNCHRONIZATION STRATEGY FOR THE NON-INVASIVE VENTILATOR SYSTEM

机译：非侵入式通风机系统的呼吸同步策略

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摘要

The study presents a method to achieve a subject-ventilator synchronic pressure supply for a non-invasive ventilator (NIV) used for obstructive sleep apnea syndrome (OSAS), solely through controlling the blower instead of using expiratory relief valves. The controller used air flow signal to distinguish inspiratory and expiratory phases, and used a fast auto-forecast (AF) algorithm to predict the current inspiratory duration based on respiration periods distinguished previously. Then in a patient's late inspiration the mechanical expiratory state was triggered to release pressure in advance. Afterward, when the beginning of a patient's actual expiration was detected, a timer was used to trigger the end-expiratory state. As the index of patient-ventilator synchrony, subject's chest movement was detected by electrical impedance signal in experiments. The experimental results indicated that the previous state transition based on the prediction of inspiratory duration can eliminate the pressure overshoot spike, and then avoid excessive expiratory pressure to subjects. The fast auto-forecast with end expiratory positive airway pressure (AF-EEPAP) controlling strategy presented in this paper provided a mild pressure curve, which is consistent with the subject's respiratory physiology, and thus improved respiratory synchrony between subject and ventilator.
机译：该研究提出了一种方法，该方法仅通过控制鼓风机而不使用呼气释放阀即可为阻塞性睡眠呼吸暂停综合症（OSAS）所用的无创呼吸机（NIV）达到主体-呼吸机同步压力供应。控制器使用气流信号来区分吸气和呼气阶段，并使用快速自动预测（AF）算法根据先前区分的呼吸周期来预测当前吸气时间。然后，在患者的后期吸气中，触发机械呼气状态以提前释放压力。之后，当检测到患者实际呼气的开始时，使用计时器触发呼气末状态。作为患者-呼吸机同步性的指标，在​​实验中通过电阻抗信号检测对象的胸部运动。实验结果表明，基于预测吸气时间的先前状态转换可以消除压力过冲尖峰，从而避免对受试者的呼气压力过大。本文提出的带有呼气末正压通气的快速自动预测（AF-EEPAP）控制策略提供了缓和的压力曲线，这与受试者的呼吸生理保持一致，从而改善了受试者与呼吸机之间的呼吸同步性。

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