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    • 25. 发明授权
    • Pump chamber back pressure dissipation apparatus and method
    • 泵室背压耗散装置及方法
    • US5658133A
    • 1997-08-19
    • US388965
    • 1995-02-15
    • Robert L. AndersonDaniel C. Colesworthy, IIIWarren P. HeimLarry Blankenship
    • Robert L. AndersonDaniel C. Colesworthy, IIIWarren P. HeimLarry Blankenship
    • A61M5/142A61M5/172A61M5/36A61M39/28F04B49/00
    • A61M5/172A61M5/365A61M2005/14208A61M2205/12A61M2205/3576A61M39/281A61M5/14244
    • A medical infusion pump (10) for delivering liquids to a patient includes an elastomeric pump chamber (140) contractable between a refill position and a discharge position. An inlet valve (122) is operatively associated with an elastomeric inlet (142) supplying liquid to the pump chamber (140). The inlet valve (122) is selectively positionable in an open position permitting and a closed position preventing flow of liquid between the inlet (142) and the pump chamber (142). An outlet valve (124) is operatively associated with an elastomeric outlet (144) which conveys liquid from the pump chamber (140). The outlet valve (124) is selectively positionable in an open position permitting and a closed position preventing flow of liquid between the outlet (144) and pump chamber (140). A pump motor (256) and associated plunger (120) contracts and expands the pump chamber (140) between the refill position and the discharge position. An electronic control (542) operatively associated with the pump motor (256) and plunger (120) and the inlet and outlet (122, 124) valves actuates the pump motor (256) and the inlet and outlet valves (122, 124) to drive liquid through the pump chamber (140) in a predetermined pumping cycle. The electronic control (542) includes a routine for dissipating ballooning in the pump chamber (140), the inlet (142) or the outlet (144) by delaying movement of the pump motor (256) with the pump chamber (140) in the contracted position and the outlet valve (124) in the open position a select amount of time.
    • 用于将液体输送到患者的医用输液泵(10)包括在再填充位置和排出位置之间可收缩的弹性泵室(140)。 入口阀(122)与向泵室(140)供应液体的弹性体入口(142)可操作地相关联。 入口阀122可选择性地定位在允许的打开位置和闭合位置,以防止液体在入口(142)和泵室(142)之间的流动。 出口阀(124)可与从泵室(140)输送液体的弹性体出口(144)可操作地相关联。 出口阀(124)可选择性地定位在允许的打开位置和闭合位置,以防止液体在出口(144)和泵室(140)之间流动。 泵电动机(256)和相关联的柱塞(120)在再填充位置和排出位置之间收缩并膨胀泵室(140)。 与泵马达(256)和柱塞(120)可操作地相关联的电子控制器(542)以及入口和出口(122,124)阀将泵马达(256)和入口阀和出口阀(122,124) 以预定的泵送循环驱动液体通过泵室(140)。 电子控制器(542)包括通过将泵电机(256)与泵室(140)的移动延迟在泵室(140)中的方式,用于消除泵室(140),入口(142)或出口(144) 收缩位置和出口阀(124)处于打开位置一定量的时间。