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2. 发明授权

US4048992A Insufflator 失效
标题翻译：吸入器
公开(公告)号：US4048992A
公开(公告)日：1977-09-20
申请号：US624845
申请日：1975-10-22
申请人： Hans-Joachim Lindemann , Peter P. Wiest
发明人： Hans-Joachim Lindemann , Peter P. Wiest
IPC分类号： A61M5/00 , A61M16/00
CPC分类号： A61M5/00
摘要： The insufflator is used for introducing limited quantities of carbon dioxide into the human body for operational purposes, particularly for laparoscopy or hysteroscopy, and is of the type comprising two pressure reducers, in series, followed by a gas flow monitoring device through which carbon dioxide is directed from a gas supply to the human body. The two pressure reducers are constantly adjusted to fixed gas supply pressures, and the monitoring device comprises a cylindrical expansion container having a central inlet port and a large diameter, and in whose peripheral zone the gas flow velocity approaches a zero rate. First and second sensing elements for the measured variable are provided in the expansion container, with the first sensing element being located immediately in the area of the inlet port and the second sensing element being located close to the cylindrical side wall at the maximum possible radial spacing from the first sensing element. The two sensing elements are included in a measuring bridge and a measuring amplifier is connected to the bridge output, with an indicator, of the rate of gas flow per unit of time, being connected to the amplifier output. For laparoscopy, the second pressure reducer is adjusted to a gas supply pressure of 15 mm Hg, and the expansion container is followed by a precision needle valve adjustable in the range of zero to 2 liters per minute. For hysteroscopy, the second pressure reducer is constantly adjusted to a supply pressure of 200 mm Hg and the expansion container is followed by a precision aperture limiting the maximum gas flow to 100 ml/min.
摘要翻译：吹入器用于将有限数量的二氧化碳引入人体用于操作目的，特别是用于腹腔镜检查或宫腔镜检查，并且是包括两个减压器的类型，其后是气流监测装置，二氧化碳是从天然气供应导向人体。两个减压器经常被调节到固定的供气压力，监测装置包括一个具有中心入口和大直径的圆柱形膨胀容器，其外围区域的气体流速接近零速率。用于测量变量的第一和第二感测元件设置在膨胀容器中，其中第一感测元件立即位于入口区域中，并且第二感测元件以最大可能的径向间隔位于圆柱形侧壁附近从第一感测元件。两个感测元件包括在测量桥中，并且测量放大器连接到桥式输出，具有指示器，其每单位时间的气体流量速率连接到放大器输出。对于腹腔镜检查，将第二减压器调整为15mm Hg的气体供应压力，并且膨胀容器之后是精密针阀，其可调节范围为零至2升/分钟。对于宫腔镜检查，第二减压器不断调节至200 mm Hg的供应压力，膨胀容器后面紧固最大气流量至100 ml / min的精密孔径。

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