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27 条记录 (耗时 0.023 秒)

    Mechanical ventilation system utilizing bias valve
    22.
    发明授权
    Mechanical ventilation system utilizing bias valve 有权
    利用偏压阀的机械通风系统

    公开(公告)号：US08118024B2

    公开(公告)日：2012-02-21

    申请号：US11486346

    申请日：2006-07-13

    申请人： Douglas F. DeVries ,  Todd Allum

    发明人： Douglas F. DeVries ,  Todd Allum

    IPC分类号： A61M16/00 ,  A62B9/02

    CPC分类号： A61M16/205 ,  A61M16/0003 ,  A61M16/0057 ,  A61M16/0066 ,  A61M16/0069 ,  A61M16/0833 ,  A61M16/107 ,  A61M16/208 ,  A61M2016/0021 ,  A61M2016/003 ,  A61M2016/0039 ,  A61M2205/3334 ,  A61M2205/42 ,  F04C18/126 ,  F04C28/24 ,  F04C29/0035 ,  F04C2220/24

    摘要： A portable mechanical ventilator having a ROOTS® blower is configured to provide a desired gas flow and pressure to a patient circuit. The mechanical ventilator includes a flow meter operative to measure gas flow produced by the ROOTS® blower and an exhalation control module configured to operate an exhalation valve connected to the patient circuit. A bias valve connected between the ROOTS® blower and the patient circuit is specifically configured to generate a bias pressure relative to the patient circuit pressure at the exhalation control module. The bias valve is further configured to attenuate pulsating gas flow produced by the ROOTS® blower such that gas flowing to the mass flow meter exhibits a substantially constant pressure characteristic. The bias pressure facilitates closing of the exhalation valve at the start of inspiration, regulates positive end expiratory pressure during exhalation, and purges sense lines via a pressure transducer module.

    摘要翻译： 具有ROOTS®鼓风机的便携式机械呼吸机被配置为向患者回路提供期望的气体流量和压力。 机械通气机包括一个可以测量由ROOTS®鼓风机产生的气流的流量计和一个配置成操作连接到患者回路的呼气阀的呼气控制模块。 连接在ROOTS®鼓风机和患者回路之间的偏压阀被特别地配置成产生相对于呼气控制模块处的患者回路压力的偏压。 偏压阀还被配置成衰减由鼓风机产生的脉动气流，使得流到质量流量计的气体表现出基本恒定的压力特性。 偏压有助于在呼吸开始时关闭呼气阀，调节呼气期间的呼气末正压，并通过压力传感器模块清除感测线。

    Ventilator system
    23.
    发明授权
    Ventilator system 有权
    呼吸机系统

    公开(公告)号：US6152135A

    公开(公告)日：2000-11-28

    申请号：US178466

    申请日：1998-10-23

    申请人： Douglas F. DeVries ,  Michael B. Holmes

    发明人： Douglas F. DeVries ,  Michael B. Holmes

    IPC分类号： A61M16/00 ,  A61M16/12 ,  A61M16/20 ,  A62B9/02

    CPC分类号： A61M16/20 ,  A61M16/00 ,  A61M16/0057 ,  A61M16/12 ,  A61M16/204 ,  A61M16/0066 ,  A61M2016/0021 ,  A61M2016/0039 ,  A61M2205/42

    摘要： A portable mechanical ventilator uses a constant-speed compressor compressor and a recirculating bypass circuit. Bypass flow is governed by a spring-biased bypass valve so connected to both the inlet and the outlet of the main flow control valve as to maintain a differential pressure across the flow valve sufficient to operate the ventilator with minimal energy consumption. The flow valve is operated by a microprocessor in accordance with empirically derived lookup tables to both produce the desired air flow and provide a measure of that air flow.

    摘要翻译： 便携式机械呼吸机使用恒速压缩机压缩机和循环旁路电路。 旁路流由一个弹簧偏置的旁通阀控制，连接到主流量控制阀的入口和出口两端，以保持跨越流量阀的压差足以以最小的能量消耗操作呼吸机。 流量阀由微处理器根据经验导出的查找表来操作，以产生所需的气流并提供该气流的量度。

    Exhalation valve for mechanical ventilator
    24.
    发明授权
    Exhalation valve for mechanical ventilator 失效
    机械呼吸机呼气阀

    公开(公告)号：US6102038A

    公开(公告)日：2000-08-15

    申请号：US80327

    申请日：1998-05-15

    申请人： Douglas F. DeVries

    发明人： Douglas F. DeVries

    IPC分类号： A61M16/20 ,  A62B9/02

    CPC分类号： A61M16/208 ,  A61M16/209 ,  A61M2202/0283

    摘要： An exhalation valve assembly for use in the mechanical ventilation of respiratory patients in which the PEEP valve and the exhalation valve are combined into a single valve mechanism, and which includes a wye in which the patient tube splits at equal angles into the ventilator tube and a tube closed off by the PEEP valve, so as to maintain the exhalation drive hose and the ventilator hose generally parallel, and avoid sharp angles in the air flow.

    摘要翻译： 一种用于呼吸患者的机械通气的呼气阀组件，其中PEEP阀和呼气阀组合成单个阀机构，并且其包括其中患者管以相等的角度分成通气管并且 管子由PEEP阀封闭，以保持呼气驱动软管和呼吸机软管大致平行，并避免空气流中的尖角。

    Variable orifice flow sensing apparatus
    26.
    发明授权
    Variable orifice flow sensing apparatus 失效
    可变孔流量检测装置

    公开(公告)号：US4993269A

    公开(公告)日：1991-02-19

    申请号：US285086

    申请日：1988-12-16

    申请人： Darrell W. Guillaume ,  Michael G. Norton ,  Douglas F. DeVries

    发明人： Darrell W. Guillaume ,  Michael G. Norton ,  Douglas F. DeVries

    IPC分类号： G01F1/28 ,  A61B5/087 ,  G01F1/22 ,  G01F1/36 ,  G01F1/42

    CPC分类号： A61B5/0876 ,  G01F1/22 ,  G01F1/36 ,  G01F1/42

    摘要： An apparatus for detecting fluid flow by obtaining a differential pressure across an obstruction in a fluid conveying channel. The obstruction is hingably connected to the housing of the channel. The connection is of a width substantially less than the periphery of the channel so as to reduce the collection of contaminants which decrease the accuracy of the apparatus. Because the orifice defined by the area between the obstruction and the periphery of the channel is variable according to the fluid flow, the pressure differential versus flowrate relationship is different from the square-law relationship of a fixed orifice, and provides a relatively high pressure differential at low flowrates and a relatively low pressure differential at high flowrates.

    Medical ventilator system
    27.
    发明授权
    Medical ventilator system 失效
    医用呼吸机系统

    公开(公告)号：US4527557A

    公开(公告)日：1985-07-09

    申请号：US667115

    申请日：1984-11-01

    申请人： Douglas F. DeVries ,  Arie Cohen

    发明人： Douglas F. DeVries ,  Arie Cohen

    IPC分类号： A61M16/00 ,  A61M16/20

    CPC分类号： A61M16/00 ,  A61M16/204 ,  A61M16/205 ,  A61M16/206 ,  A61M2016/0021 ,  A61M2016/0039

    摘要： A volume ventilator is disclosed which has a balloon valve type exhalation valve for permitting release of gases to the ambient environment during the exhalation period of artificial ventilation or spontaneous breathing, or when there is excess proximal pressure in the ventilator system. A pressure transducer continuously senses the proximal pressure in the ventilator system and sends to a microcomputer controller and associated circuitry of the ventilator system a signal indicative of the instantaneous proximal pressure. The pressure in the balloon, which is the pilot pressure of the exhalation valve, is regulated through a jet venturi type pressure controller which is connected to a source of pressurized gas. The gas flows through the jet venturi, wherein its flow rate is regulated by a ball valve moving against a suitable valve seat. The ball valve is controlled by a stepper motor through a cam follower. The stepper motor is controlled through electronic signals generated in the computer control in response to the difference between the instantaneously sensed proximal pressure, and the pilot pressure required to be present in the balloon in accordance with an algorithm or preselected pilot pressure-versus-time function. Accurate servo control of the flow of respiratory gas to the patient is accomplished by a flow control subsystem which incorporates a flow control valve controlled by a second stepper motor. The flow of the respiratory gas is monitored, downstream of the flow control valve, by a flow transducer. The flow transducer sends to the microcomputer controller a signal indicative of the instantaneous flow rate of the respiratory gas. The microcomputer controller compares the instantaneous flow rate to a flow rate value required by an algorithm or preselected flow rate-versus-time function stored in its memory. The microcomputer controller then sends a signal to the second stepper motor to adjust the flow control valve to provide the flow rate instantaneously required by the preselected function or algorithm.