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Keep vein open method and injector with keep vein open function

  • US 20050182371A1
  • Filed: 02/13/2004
  • Published: 08/18/2005
  • Est. Priority Date: 02/13/2004
  • Status: Active Grant
First Claim
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1. A syringe for use with a patient comprising:

  • a barrel having an inner wall;

    a plunger slidably positioned within the barrel, the plunger having a head and a pushrod attached to the head;

    a fluid chamber distally located from the plunger in the barrel, the fluid chamber having a volume, the volume of the fluid chamber being adjustably defined by the position of the plunger within the barrel;

    wherein the plunger is adapted to increase the volume of the fluid chamber without manually withdrawing the pushrod from the barrel.

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