Vascular treatment method and device

• US 6,991,617 B2
• Filed: 08/21/2003
• Issued: 01/31/2006
• Est. Priority Date: 08/21/2002
• Status: Expired due to Fees

• Current Assignee: Nfocus Neuromedical, Inc. (Medtronic Plc)
• Original Assignee: Chad Kugler, Edward S. Andrle, Matt Olson, Thomas R. Hektner
• Inventors: Hektner, Thomas R., Kugler, Chad, Olson, Matt, Andrle, Edward S.
• Primary Examiner(s): Hayes, Michael J.
• Application Number:
  US10/645,013
• Publication Number:
  US 20040064093A1
• Time in Patent Office: 894 Days
• Field of Search: 604/103.01, 604/103.02, 604/103.03, 604/103.05, 604/103.06, 604/103.08, 604/508, 604/509
• US Class Current: 604/103.01
• CPC Class Codes: A61M 2025/1013 with concentrically mounted balloons, e.g. being independently inflatable
• CPC Class Codes: A61M 2025/105 having a balloon suitable for drug delivery, e.g. by using holes for delivery, drug coating or membranes
• CPC Class Codes: A61M 2025/1086 having a special balloon surface topography, e.g. pores, protuberances, spikes or grooves
• CPC Class Codes: A61M 25/104 used for angioplasty
• CPC Class Codes: A61M 37/00 Other apparatus for introducing media into the body for reproduction or fertilisation A61B17/425; apparatus for iontophoresis or cataphoresis A61N1/30; Percutany, i.e. introducing medicines into the body by diffusion through the skin salt baths A61H33/04

Abstract

An intravascular catheter with micro spines that penetrate arterial wall to delivery drug or mechanical injury to the vessel wall inducing a “stent” like healing process in the vessel.

Claims

1. An intravascular catheter device comprising:

an elongate catheter body having a proximal end and having a distal end;

an exterior deployment balloon having a thermally activated surface having surface features having a nominal height of between about 10 and 120 microns, said surface located proximate said distal end of said catheter body, wherein said thermally active surface includes a plurality of shape memory plastic spines/tines having a first retracted position corresponding to a first temperature, and a second deployed position;

an interior deployment balloon located inside said exterior deployment balloon;

said interior balloon and said exterior balloon together forming and defining a drug reservoir between the opposed surfaces of said balloons;

a plurality of drug release apertures proximate said thermally activated surface communicating with said drug reservoir;

a fluid supply lumen in said catheter body coupled to said interior deployment balloon for inflating said interior deployment balloon to expand it and to pressurize the drug in said reservoir to assist in delivering the drug.

2. An intravascular catheter device comprising:

an elongate catheter body having a proximal end and having a distal end;

an exterior deployment balloon having a thermally activated surface, located proximate said distal end of said catheter body;

said thermally activated surface includes;

a plurality of shape memory plastic spines/tines having a first retracted position corresponding to a first temperature, and a second deployed position;

an interior deployment balloon located inside said exterior deployment balloon;

said interior balloon and said exterior balloon together forming and defining a drug reservoir between the opposed surfaces of said balloons;

a plurality of drug release apertures proximate said thermally activated surface communicating with said drug reservoir;

a fluid supply lumen in said catheter body coupled to said interior deployment balloon for inflating said interior deployment balloon to expand it and to pressurize the drug in said reservoir to assist in delivering the drug;

said drug release apertures are uncovered by said spines when said spines are in said second deployed position.