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公开(公告)号：US5596984A
公开(公告)日：1997-01-28
申请号：US304047
申请日：1994-09-12
CPC分类号： A61M16/20 , A61M16/202
摘要： The lung ventilator safety valve circuit includes a normally open, pulse width modulated solenoid safety valve connected to a patient airway of a ventilator system. A pressure sensor monitors pressure in the patient airway, and a control unit maintains the safety valve closed when the pressure is not excessive. The safety valve is opened when the sensed pressure equals or exceeds a maximum airway pressure threshold that can be set by an operator, or in the event of a power failure.
摘要翻译： 肺呼吸机安全阀电路包括连接到呼吸机系统的患者气道的常开脉宽调制电磁安全阀。 压力传感器监测患者气道中的压力，并且当压力不过大时，控制单元保持安全阀关闭。 当检测到的压力等于或超过操作人员可设置的最大气道压力阈值时，或者发生电源故障时，安全阀将打开。
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2.发明授权
公开(公告)号：US5632270A
公开(公告)日：1997-05-27
申请号：US304048
申请日：1994-09-12
CPC分类号： A61M16/20 , A61M16/206
摘要： Patient airway baseline pressure levels are controlled in a ventilator having a pneumatically controlled exhalation valve without an external supply of pilot pressure, by supplying an internal source of controllable pilot pressure for operating the exhalation valve. The pressure of pressurized air supplied by an internal pump can be electrically controlled by pulse width modulation of a variable pulse duration signal. A second source of pressurized air for pilot pressure is provided, and in one embodiment is a reservoir provided for receiving pressurized air from the pump and from the exhalation circuit. A valve is connected to the pump means and the reservoir for receiving pressurized air from the pump in a first position, and for receiving pressurized air from the reservoir in a second position. When the valve means is in the second position, pressurized air is delivered at a pressure which is the greater of the pressurized air supplied by the pump means or the gas flow from the exhalation circuit.
摘要翻译： 通过提供用于操作呼气阀的可控先导压力的内部源，在具有气动控制的呼气阀的呼吸机中控制患者气道基线压力水平，而没有外部供应先导压力。 由内部泵提供的加压空气的压力可以通过可变脉冲持续时间信号的脉冲宽度调制来电控制。 提供了用于先导压力的第二压力空气源，并且在一个实施例中是用于从泵和从呼气回路接收加压空气的储存器。 阀连接到泵装置和储存器，用于在第一位置从泵接收加压空气，并且用于在第二位置接收来自储存器的加压空气。 当阀装置处于第二位置时，加压空气以泵装置供应的加压空气或来自呼气回路的气流的压力较大的压力输送。
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公开(公告)号：US5909731A
公开(公告)日：1999-06-08
申请号：US761392
申请日：1996-12-06
CPC分类号： A61M16/20 , A61M16/202
摘要： The lung ventilator safety valve circuit includes a normally open, pulse width modulated solenoid safety valve connected to a patient airway of a ventilator system. A pressure sensor monitors pressure in the patient airway, and a control unit maintains the safety valve closed when the pressure is not excessive. The safety valve is opened when the sensed pressure equals or exceeds a maximum airway pressure threshold that can be set by an operator, or in the event of a power failure.
摘要翻译： 肺呼吸机安全阀电路包括连接到呼吸机系统的患者气道的常开脉宽调制电磁安全阀。 压力传感器监测患者气道中的压力，并且当压力不过大时，控制单元保持安全阀关闭。 当检测到的压力等于或超过操作人员可设置的最大气道压力阈值时，或者发生电源故障时，安全阀将打开。
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