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1. 发明授权

US06494694B2 Disposable infusion cassette with low air bubble retention and improved valves 有权
标题翻译：具有低气泡保持力和改进阀门的一次性输液盒
公开(公告)号：US06494694B2
公开(公告)日：2002-12-17
申请号：US09842529
申请日：2001-04-25
申请人： Mike W. Lawless , Alex P. Soberon , Scott M. Defenbaugh , John D. Gjata , David Johnston , Robert Brose
发明人： Mike W. Lawless , Alex P. Soberon , Scott M. Defenbaugh , John D. Gjata , David Johnston , Robert Brose
IPC分类号： F04B4300
CPC分类号： A61M5/142 , A61M5/36 , A61M5/365 , A61M2205/128 , A61M2205/3355 , A61M2205/42 , F04B43/0054 , F04B43/02 , Y10T137/7843
摘要： A disposable cassette for use with a medical infusion pump. An elastomeric membrane is captured between a facing member and a base of the cassette and is displaced into a pumping chamber. The elastomeric membrane includes a generally T-shaped lip, and corresponding grooves are provided on the facing member and base. As the cassette is assembled, an interference fit between the lip and the grooves causes the membrane to stretch taut and to be securely anchored, eliminating a break-in period when the cassette is initially used. “Lobes” of increased thickness provided on the undersurface of a portion of the elastomeric membrane overlying the pumping chamber reduce the residual volume of the pumping chamber, thereby reducing the volume of air retained within the chamber and increasing the accuracy of the cassette. The lobes also sweep air bubbles from the sides of the pumping chamber during operation, further reducing air bubbles retained in the pumping chamber. A distal tube support retains a distal fluid line between air or pressure sensors included on a pump drive mechanism, thus reducing the likelihood of sensing errors. Inlet and outlet valve flaps and corresponding seating surfaces included in the base are configured to provide quieter operation, further reduce the residual volume of the pumping chamber, increase fluid velocity through the outlet valve to sweep air bubbles from the pumping chamber, and protect against a “blown” inlet valve.
摘要翻译：用于医用输液泵的一次性盒。弹性膜被捕获在面对构件和盒的基座之间并且被移动到泵送室中。弹性体膜包括大致T形的唇缘，并且在相对的构件和底座上设置相应的凹槽。当盒被组装时，唇缘和凹槽之间的过盈配合使得膜拉伸并牢固地锚定，消除了盒最初使用时的打入时间。提供在覆盖泵送室的弹性膜的一部分的下表面上的增加的厚度的“小叶”减小了泵送室的剩余体积，从而减小了保持在室内的空气的体积并提高了盒的精度。在操作期间，叶片还从泵送室的侧面吹扫气泡，进一步减少保持在泵送室中的气泡。远端管支撑件保持包括在泵驱动机构上的空气或压力传感器之间的远端流体管线，从而降低感测误差的可能性。入口和出口阀瓣和包括在基座中的相应的就座表面被配置为提供更安静的操作，进一步减小泵送室的剩余体积，增加通过出口阀的流体速度以从泵送室吹扫气泡，并防止 “吹”入口阀。

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