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Medical device for crossing an occlusion in a vessel

  • US 7,841,994 B2
  • Filed: 11/02/2007
  • Issued: 11/30/2010
  • Est. Priority Date: 11/02/2007
  • Status: Active Grant
First Claim
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1. A medical guidewire comprising:

  • an elongated core member including an outer surface;

    an intermediate member helically surrounding at least a portion of the core member, the intermediate member including an outer surface, wherein the intermediate member is disposed at a first pitch about at least a portion of the core member; and

    a coil member surrounding at least a portion of the outer surface of the intermediate member and at least a portion of the outer surface of the core member, at least a portion of the coil member including an undulating outer surface defined by the coil member tracking the outer surface of the intermediate member, wherein the coil member is disposed at a second pitch about at least a portion of the outer surface of the intermediate member, wherein the first pitch is relatively loose compared to the second pitch, wherein the undulating outer surface has a third pitch corresponding to the first pitch of the intermediate member.

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