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Pro-cell intra-cavity therapeutic agent delivery device

  • US 5,693,029 A
  • Filed: 07/10/1995
  • Issued: 12/02/1997
  • Est. Priority Date: 07/10/1995
  • Status: Expired due to Term
First Claim
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1. A catheter device and a system useful in the treatment of internal body cavity walls such as blood vessels, said catheter comprising:

  • a catheter body having a first inner lumen, a second inner lumen, and one or more outer lumens, a proximal backend, and a distal end, said first inner lumen, said second inner lumen and said outer lumens extending from said proximal backend to said distal end;

    said first inner lumen existing for the introduction of a guide wire, catheterization balloon, light source, or other device;

    an expandable and flexible invention site located close to said distal end of said catheter body comprising one or more needle assemblies each located within one of said outer lumens, an internal inflation balloon in fluid communication with said second lumen and circumferentially surrounding and sealed to said first inner lumen and said second inner lumen such that an internal void is formed within said internal inflation balloon, one or more retraction members encircling said needle assemblies, and portals;

    said outer lumens circumferentially surrounding said first inner lumen, said second inner lumen and said internal inflation balloon;

    said second inner lumen having a fill hole and a stopper or seal, said fill hole located within said internal inflation balloon, said stopper sealing said second inner lumen distal to said fill hole;

    said needle assemblies each comprising a hollow shaft having an open proximal end and a sealed distal end, further having a plurality of tissue insertion needles, said tissue insertion needles and said hollow shaft residing entirely within one of said outer lumens when said internal inflation balloon is deflated, said tissue insertion needles each having a tip with an opening, said tips aligned with said portals;

    said hollow shaft, said tissue insertion needles and said tips are sealingly connected and in fluid communication such that therapeutic agents can be transferred from said proximal end of said hollow shaft and out of said open tips of said tissue insertion needles;

    said portals extending through said catheter body and into said outer lumens, circumferentially surrounding said internal inflation balloon;

    said retraction members are for drawing said tissue insertion needles back into said catheter body;

    said inner inflation balloon having a known and calibrated inflation rate and said tissue insertion needles having a known and calibrated length such that inflation of said internal inflation balloon causes said tips of said tissue insertion needles to extend through said portals and pierce the body tissue at a desired treatment site to a known and calibrated depth for the delivery of desired therapeutic agents.

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