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Apparatus and method for administering a therapeutic agent into tissue

  • US 20070025890A1
  • Filed: 08/01/2005
  • Published: 02/01/2007
  • Est. Priority Date: 06/15/2004
  • Status: Active Grant
First Claim
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1. A syringe comprising:

  • a barrel;

    a plunger for insertion into a first end of said barrel and delivering said agent from a second end of said barrel;

    a generator attached to one of said plunger and said barrel, said generator for producing a gaseous therapeutic agent; and

    , an accumulator within said barrel having an accumulation configuration in communication with said generator for accumulating said agent;

    said accumulator having a delivery configuration placing said accumulator in communication with said second end;

    said accumulator automatically changeable from said accumulation configuration to said delivery configuration when a desired level of agent has been generated in said accumulator such that said agent can be delivered from said second end.

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