Inverting braided aneurysm implant with dome feature
AssigneeDePuy Synthes Products, Inc.
InventorsRuijiao XU, Lacey GOROCHOW
Life of this patent
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Abstract
An implant can be implanted in an aneurysm to cause thrombogenesis within the aneurysm's sac. The implant can include a braid that can extend across the aneurysm neck and anchor to aneurysm's walls at least in the proximal portion of the aneurysm sac. The implant can further include a dome feature configured to press into aneurysm walls near the aneurysm's dome and facilitate securement of the braid across the aneurysm's neck. The braid at the aneurysm's neck and the dome feature can be joined or constricted at a junction, for instance with a radiopaque band. The dome feature can include a braid, embolic coil, and/or wire frame. The braid can be inverted based on a heat-set predetermined shape, where several predetermined shapes are suitable.
Claims20
An implant comprising:
- a first braided segment comprising a distal open end;
- a second braided segment comprising a proximal pinched end;
- a band positioned at a junction between the first braided segment and the second braided segment and constricting the first braided segment and the second braided segment at the junction;
- and
- a predetermined shape in which the first braided segment extends in a distal direction from the band forming a bowl shape and the second braided segment extends in a proximal direction from the band and comprises two inversions separating three sections which at least partially overlap each other such that the pinched end is affixed to an innermost section of the three sections, the band is affixed to an outermost section of the three sections, and a middle section of the three sections extends between the two inversions and is positioned within the outermost section and around the innermost section.
A method for constructing an implant, the method comprising:
- affixing a band at a junction between a first braided segment and a second braided segment, the first braided segment comprising a distal open end and the second braided segment comprising a proximal pinched end;
- and
- shaping, as follows, the implant to a predetermined shape to which the implant is capable of self-expanding:
- forming the first braided segment to a bowl shape extending in a distal direction from the band;
- inverting the second braided segment to form a proximal inversion folded toward the distal direction thereby defining an outermost section of the second braided segment;
- and
- inverting the second braided segment to form a distal inversion folded toward the proximal direction thereby defining a middle section between the proximal and distal inversions of the second braided segment that is at least partially surrounded by the outermost section and defining an innermost section 148, 246, 346, 446) between the distal inversion and the pinched end that is at least partially surrounded by the middle section.
A method of treating an aneurysm, the method comprising:
- pushing an open end of a first braided segment of an implant from a distal end of a microcatheter into a sac of an aneurysm;
- positioning the open end near a distal wall of the aneurysm;
- shaping the first braided segment to form a distal sack positioned against a dome of the aneurysm and extending centrally through the sac to a band affixed to the first braided segment;
- shaping an outer section of a second braided segment of the implant to form proximal sack extending centrally through the sac from the band, positioned against a portion of an aneurysm wall in a proximal direction from the distal sack, and extending across at least a portion of a neck opening of the aneurysm;
- inverting the second braided segment approximate the neck opening;
- and
- inverting the second braided segment within the proximal sack.
Dependencies are inferred from the claim text.