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1. 发明授权

US06475178B1 Autopriming a micro-cassette while minimizing the formation of air bubbles in a pumping chamber 失效
标题翻译：在最小化泵送室中的气泡形成的同时，对微型盒进行自动控制
公开(公告)号：US06475178B1
公开(公告)日：2002-11-05
申请号：US09636338
申请日：2000-08-10
申请人： David J. Krajewski , Thomas D. Canup
发明人： David J. Krajewski , Thomas D. Canup
IPC分类号： A61M100
CPC分类号： F04B43/043 , A61M5/142 , A61M5/14224 , A61M2005/1402 , A61M2205/12 , F04B43/02
摘要： A pump used to infuse a medical liquid into a patient is autoprimed under the control of a microprocessor that monitors and adjusts a priming sequence to minimize the accumulation of small air bubbles within a pumping chamber of the cassette. Small air bubbles can be created by the agitation of liquid and air within the cassette during priming, and as a result of changing pressure conditions within the cassette. Adherence of the air bubbles on the walls of the pumping chamber can negatively affect performance of the pump. The microprocessor controls the flow of liquid into the pump cassette from a liquid supply to establish a layer of liquid at the bottom of the air trap, thereby preventing air bubbles within the air trap from moving into the pumping chamber. The layer of liquid acts as a one-way valve, allowing air to rise up from the pumping chamber and pass through the liquid layer into the air trap, but preventing air from passing through the liquid layer and down into the pumping chamber. The microprocessor then back primes the cassette until air is removed from the proximal liquid line connecting the liquid supply to the cassette. At that point, liquid is pumped from the liquid supply to forward prime the cassette until air is removed from the pumping chamber and a distal liquid line.
摘要翻译：用于将医用液体注入患者体内的泵在微处理器的控制下自动调节，该微处理器监控并调整起动顺序，以最小化盒内泵送室内的小气泡的积聚。通过在启动期间通过在盒内的液体和空气的搅动以及由于盒内的压力条件的改变而产生小的气泡。泵送室壁上气泡的粘附可能会不利地影响泵的性能。微处理器从液体供应器控制液体进入泵盒的流动，以在空气阱的底部建立一层液体，从而防止空气阱内的气泡进入泵送室。液体层作为单向阀，允许空气从泵送室上升并通过液体层进入空气阱，但防止空气通过液体层并进入泵送室。然后，微处理器反向吸入盒式磁带，直到从连接液体供应到盒的近端液体管路除去空气。在这一点上，从液体供应液中泵出液体以将盒子向前注入，直到空气从泵送室和远端液体管路中取出。

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