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1. 发明授权

US07842003B2 Pulsatile fluid delivery system 有权
标题翻译：脉动流体输送系统
公开(公告)号：US07842003B2
公开(公告)日：2010-11-30
申请号：US11297989
申请日：2005-12-09
申请人： Kenneth A. Jones , Cristo Suresh Corera , Richard S. Hayes
发明人： Kenneth A. Jones , Cristo Suresh Corera , Richard S. Hayes
IPC分类号： A61M37/00 , F04B43/12 , A61N1/362
CPC分类号： F04B49/065
摘要： A system for delivering blood, cardioplegia solution, and other medications or fluids in a pulsatile flow pattern to a patient during cardiopulmonary bypass is disclosed. In a preferred embodiment, a pumping apparatus having at least one chamber is utilized in which a pumping action is achieved by compressing one of the chambers with a piston mechanism, while allowing the other chamber to fill with fluid via retracting its respective piston. The instantaneous flow rate of either of the chambers is determined by the speed of the piston. In a preferred embodiment, a pulsatile flow of fluid is achieved by cyclically alternating the velocity of the piston between two different speeds. A desired average flow rate and/or delivery pressure and/or constant pulse pressure is maintained by adjusting the alternating velocities at the desired frequency and duty cycle. The calculations necessary to obtain a desired average flow rate are performed by a microprocessor, which also controls the movement of the pistons.
摘要翻译：公开了一种用于在体外循环期间向患者输送血液，心麻痹液和脉动流动模式的其它药物或流体的系统。在优选实施例中，使用具有至少一个室的泵送装置，其中通过用活塞机构压缩其中一个室来实现泵送作用，同时允许另一个室通过缩回其相应的活塞来填充流体。任何一个室的瞬时流量由活塞的速度决定。在优选实施例中，通过在两个不同速度之间循环地交替活塞的速度来实现流体的脉动流。通过在所需的频率和占空比下调节交变速度来维持期望的平均流速和/或输送压力和/或恒定脉冲压力。获得所需平均流量所需的计算由微处理器执行，微处理器也控制活塞的运动。

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