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Valve system and method for control of an infusion pump

  • US 5,423,759 A
  • Filed: 04/01/1994
  • Issued: 06/13/1995
  • Est. Priority Date: 11/02/1992
  • Status: Expired due to Fees
First Claim
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1. An infusion pump for delivering intravenous fluid from a variable geometry intravenous bag to a patient through a tube, the infusion pump comprising:

  • a receptacle for containing the bag;

    a moveable member for contacting a surface of the bag, the moveable member configured to apply a force to the bag surface to cause the intravenous fluid to flow out of the bag and into the tube;

    drive means for moving the moveable member;

    pressure sensing means for sensing the pressure of the fluid within the bag; and

    ,valve means associated with the tube for reversibly restricting fluid flow through the tube, the valve means communicating with the pressure sensing means and being actuated between an open position and a closed position as a result of changes in the pressure of the fluid within the bag as detected by the sensing means.

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