发明名称 |
MECHANICAL VENTILATION SYSTEM UTILIZING BIAS VALVE |
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. |
申请公布号 |
EP2040784(A4) |
申请公布日期 |
2012.07.11 |
申请号 |
EP20070809783 |
申请日期 |
2007.06.22 |
申请人 |
CAREFUSION 203, INC. |
发明人 |
DEVRIES, DOUGLAS F.;ALLUM, TODD |
分类号 |
A61M16/00;A61M16/20;A62B7/00;F01C1/18;F04C29/00 |
主分类号 |
A61M16/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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