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Infusion pump with tube spike holder

  • US 5,681,284 A
  • Filed: 06/16/1995
  • Issued: 10/28/1997
  • Est. Priority Date: 10/31/1994
  • Status: Expired due to Term
First Claim
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1. An infusion pump for infusing intravenous solution from a bag through intravenous tubing into a patient, the bag having a flexible sidewall which at least partially encloses an interior chamber to contain the solution, the bag further having a dispensing port for releasable connection with an end of the tubing, the infusion pump comprising the combination of:

  • a housing having a compartment for removably receiving and supporting the bag in a solution-dispensing position;

    a bladder having a flexible wall which moves by expansion and contraction responsive to respective increase and decrease in the pressure of a fluid within the bladder;

    means for mounting the bladder within the housing in a position for applying a pushing force against the sidewall of the bag to collapse the bag responsive to expansion of the bladder wall whereby solution within the chamber in the bag is infused out through the dispensing port;

    pump means for pumping fluid into the bladder to increase said pressure in an effective amount to cause said collapse of the bag;

    pressure sensor means for generating an electrical signal representing fluid pressure responsive to said expansion and contraction movement of the bladder wall for indirectly sensing said pressure of the fluid within the bladder; and

    control means for controlling the pump means between a fluid pumping mode and an off mode responsive to said electrical signal.

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