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1. 发明授权

US4396385A Flow metering apparatus for a fluid infusion system 失效
标题翻译：用于流体输注系统的流量计量装置
公开(公告)号：US4396385A
公开(公告)日：1983-08-02
申请号：US213353
申请日：1980-12-05
申请人： Timothy G. Kelly , David A. Lohr , Peter A. St. John
发明人： Timothy G. Kelly , David A. Lohr , Peter A. St. John
IPC分类号： A61M5/172 , A61M5/20
CPC分类号： A61M5/172 , A61M5/14216 , A61M5/16809 , Y10S128/12
摘要： Metering apparatus for controlling the flow of fluid through a fluid infusion system at an operator-designated rate includes a single-use cassette having a syringe-type pump in the flow system. The cassette is removably mounted on actuator apparatus which drives the syringe plunger through alternate fill and pump modes to advance fluid through the system. To provide compensation for the lack of flow in the system during fill strokes, the plunger is advanced at a higher compensation rate for first and second portions of the pump stroke immediately preceding and immediately following each fill stroke, with the pump stroke advancing at the designated rate therebetween. This results in an average flow rate which corresponds to the designated rate. By making the first and second compensations of equal duration, the effect of the fill cycles on the regularity of the average flow rate is minimized.
摘要翻译：用于以操作员指定的速率控制通过流体输注系统的流体流动的测量装置包括在流动系统中具有注射器型泵的一次性盒。磁带盒可拆卸地安装在致动器装置上，驱动装置通过交替的填充和泵模式驱动注射器柱塞，以使流体通过系统。为了在填充冲程期间为系统中的流量缺乏提供补偿，在紧随每个填充冲程之前和之后，柱塞在泵冲程的第一和第二部分以较高的补偿率前进，泵冲程在指定的率之间。这导致对应于指定速率的平均流量。通过进行相等持续时间的第一和第二补偿，填充循环对平均流量的规律性的影响被最小化。

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