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Methods and apparatuses for flow restoration and implanting members in the human body

  • US 9,039,749 B2
  • Filed: 10/01/2010
  • Issued: 05/26/2015
  • Est. Priority Date: 10/01/2010
  • Status: Active Grant
First Claim
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1. A medical device comprising:

  • a guidewire having a proximal end and a distal end, the distal end comprising a stem;

    a connection mechanism comprising (a) the stem, (b) a ball attached directly to the stem, (c) a keyway structure configured to receive the stem and the ball, (d) a sleeve surrounding the keyway structure, the stem, and the ball, and (e) an adhesive between (i) the sleeve and (ii) the stem and the ball, the stem and the ball positioned in the keyway, and the ball being unreleasable from the keyway and the sleeve; and

    a self-expanding member attached to the distal end of the guidewire via the connection mechanism, the self-expanding member having a mesh configuration and comprising;

    the keyway structure,a proximal portion having a first plurality of cells, the proximal portion being tapered along a longitudinal portion of its length;

    a distal portion having a second plurality of cells, the distal portion forming a generally tube-like configuration having a central, longitudinal axis; and

    a seam along a longitudinal axis of the distal portion, the seam forming two edges extending generally longitudinally along the self-expanding member;

    wherein the self-expanding member can be modified into a volume-reduced form having a generally coiled, tubular configuration for insertion within a microcatheter, the edges of the distal portion being overlapped in the volume-reduced, coiled configuration such that in the volume-reduced, coiled configuration the self-expanding member has multiple layers in at least one radial direction;

    wherein a distal end of the distal portion further comprises filaments that include distal elements, the filaments and distal elements of the distal end being bent radially inwardly towards the central longitudinal axis;

    wherein the first plurality of cells comprises filaments having a filament thickness of between 0.045 mm and 0.080 mm, and a filament width of between 0.040 mm and 0.090 mm;

    wherein the second plurality of cells comprises filaments having a filament thickness of between 0.040 mm and 0.075 mm, and a filament width of between 0.038 mm and 0.082 mm;

    wherein the second plurality of cells comprises cells having a width of between 3.50 mm to 5.50 mm and a height of between 2.50 mm to 4.5 mm;

    wherein the self-expanding member has a radial force measurement greater than or equal to 0.0010 N/mm and a chronic outward force of less than or equal to 0.026 N/mm as measured using a thin film method of testing, and a radial force measurement of between approximately 6 to 37 gf/in as measured using a two-pin method of testing.

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