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Occlusive devices and methods of use

  • US 9,687,245 B2
  • Filed: 03/15/2013
  • Issued: 06/27/2017
  • Est. Priority Date: 03/23/2012
  • Status: Active Grant
First Claim
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1. An aneurysm therapy system, comprising, in combination:

  • a catheter having a proximal end, a distal end, and a lumen extending between the proximal and distal ends, wherein the distal end of the catheter is configured to be positioned at or near an aneurysm; and

    an occlusive device, disposed within the lumen and configured to reside in the aneurysm to restrict fluid flow within the aneurysm, the occlusive device comprising;

    a distal section comprising a coil having an outer diameter, a coil length extending from a proximal end of the coil to a distal end of the coil, and a coil flexibility, the coil distal end being a free, terminal distal end of the coil;

    a self-expanding braided proximal section comprising a closed distal end and a free, terminal proximal end, the braided proximal section having (i) a radially compressed state with a first diameter when positioned within the delivery lumen and (ii) a radially expanded state with a second diameter, greater than the coil diameter, when unconstrained, (iii) a braid length greater than the coil length, and (iv) a braid flexibility less than the coil flexibility per unit length; and

    a tubular transition member, coupled to the coil proximal end and to the closed distal end of the braided proximal section, the transition member having (i) a transition length greater than or equal to the coil length, (ii) a transition flexibility less than the coil flexibility per unit length, and (iii) a cross-sectional profile that is less than an expanded cross-sectional profile of the braided proximal section,wherein the occlusive device is disposed within the catheter lumen such that the proximal section is proximal of the distal section along a longitudinal dimension of the occlusive device so that, during delivery of the occlusive device to the aneurysm, the distal section emerges from the distal end of the catheter before the proximal section, andwherein the proximal section is configured to expand to the expanded cross-sectional profile during advancement out of the distal end of the catheter, and the distal section is configured to distribute, along at least a portion of the coil length, a force of the advancement along an aneurysm interior wall.

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