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TREATMENT DEVICE

  • US 20140052104A1
  • Filed: 10/25/2013
  • Published: 02/20/2014
  • Est. Priority Date: 07/25/2011
  • Status: Active Grant
First Claim
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1. A treatment device positionable in a blood vessel to treat a stenosed region, the treatment device comprising:

  • an elongated shaft possessing a distal portion;

    an inflatable balloon fixed to the distal portion of the shaft so that the balloon and the shaft move together, the balloon possessing an outer surface and an interior;

    a flow path inside the shaft that communicates with the interior of the balloon and through which fluid is introduced into the interior of the balloon to inflate and outwardly expand the balloon;

    a restenosis-restraining biologically active agent on the outer surface of the balloon that restrains restenosis, the restenosis-restraining biologically active agent being applied to the stenosed region of the blood vessel when the balloon is inflated and outwardly expanded into contact with the stenosed region;

    a protective sleeve covering the entire axial extent of the biologically active agent, the protective sleeve possessing an inner surface and being axially movable in a proximal direction relative to the elongated shaft; and

    a cylindrically shaped interposed member positioned radially between the protective sleeve and the restenosis-restraining biologically active agent to space the protective sleeve from the restenosis-restraining biologically active agent and prevent the restenosis-restraining biologically active agent from contacting the protective sleeve, the interposed member possessing a self-expanding function in which the interposed member expands radially outwardly when the protective sleeve is axially moved in the proximal direction relative to the interposed member.

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