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    • 2. 发明授权
    • Enhanced ventilation waveform device
    • 增强通风波形装置
    • US06435182B1
    • 2002-08-20
    • US09535135
    • 2000-03-24
    • Kenneth R. LutchenDavid W. KaczkaBela Suki
    • Kenneth R. LutchenDavid W. KaczkaBela Suki
    • A61M1600
    • A61M16/0006A61B5/085A61B5/087A61M16/0063A61M16/026A61M2230/46
    • A novel ventilator waveform having an enhanced inspiratory flow pattern is ideally suited for determining an effective “inspiratory impedance” in ventilator-dependent patients, and/or patients with severe obstruction resulting in expiratory flow-limitation. This waveform is referred to herein as the “Enhanced Ventilator Waveform” (EVW). The EVW maintains ventilatory support while simultaneously providing an accurate and sensible assessment of the mechanical status of the lungs or total respiratory system. The EVW technique of the present invention ensures that normal (tidal) volume levels are delivered during each inspiration, and that expiration remains passive. Furthermore, accurate estimation of lung resistance and elastance is established for several frequencies surrounding the primary ventilator breathing rate. From the resistance and elastance data, the mean level and structural distribution of airway versus tissue constriction conditions in the lung can be inferred. Additionally, the distribution of delivered gas is more uniform (i.e, more beneficial to the patient) with the EVW, as compared to conventional waveforms.
    • 具有增强的吸气流动模式的新型呼吸机波形理想地适用于确定依赖呼吸机的患者和/或严重阻塞导致呼气流量限制的患者的有效“吸气阻抗”。 该波形在本文中被称为“增强型呼吸机波形”(EVW)。 EVW维持通气支持,同时提供对肺或全身呼吸系统的机械状态的准确和明智的评估。 本发明的EVW技术确保在每次启动期间传递正常(潮汐)体积水平,并且该期望保持被动。 此外,围绕主要呼吸机呼吸频率的几个频率建立了对肺阻力和弹性的精确估计。 从阻力和弹性数据可以推断出气道对肺组织收缩条件的平均水平和结构分布。 此外,与传统波形相比,使用EVW的输送气体的分布更均匀(即对患者更有益)。