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2. 发明授权

US5303698A Medical ventilator 失效
标题翻译：医用呼吸机
公开(公告)号：US5303698A
公开(公告)日：1994-04-19
申请号：US750850
申请日：1991-08-27
申请人： Ronald L. Tobia , Russell J. Fischer , Robert T. Chilcoat
发明人： Ronald L. Tobia , Russell J. Fischer , Robert T. Chilcoat
IPC分类号： A61M16/00 , A61M16/20
CPC分类号： A61M16/00 , A61M16/0009 , A61M16/0012 , A61M16/204 , A61M16/205 , A61M2016/0021 , A61M2016/0039 , A61M2205/50 , A61M2230/40
摘要： A medical ventilator is provided for providing continuous, closed-loop control of the pressure of gas within a patient's mouth or respiratory tract in accordance with any selected pressure input waveform. The medical ventilator comprises an adaptive, feedback controller which provides independent control of the inspiratory and expiratory branches of the ventilator, while continuously controlling mouth pressure. The digital coefficients of the controller are updated to adjust for variations in the resistance of the patient's respiratory tract resulting from the magnitude of flow of inspiratory gas into the tract and patient-to-patient differences. Pressure in the expiratory branch is controlled by controlling, through a pressure-regulating valve, the magnitude of back pressure applied to a diaphragm valve. A venturi provides a reference pressure for the pressure-regulating valve below that of the surrounding atmosphere to enable application of a negative back pressure to the diaphragm valve.
摘要翻译：提供医疗呼吸机，用于根据任何所选择的压力输入波形，对患者的口腔或呼吸道内的气体的压力进行连续的闭环控制。医疗呼吸机包括一个自适应的反馈控制器，可以对呼吸机的吸气和呼气分支进行独立控制，同时持续控制口腔压力。更新控制器的数字系数以根据吸入气体流入管道的程度和患者与患者的差异来调整患者呼吸道阻力的变化。通过压力调节阀控制施加到隔膜阀的背压的大小来控制呼气支路中的压力。文丘里管为压力调节阀提供低于周围气氛的参考压力，以便能够对隔膜阀施加负的背压。

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