| CPC A61B 17/12113 (2013.01) [A61B 17/12145 (2013.01); A61B 90/39 (2016.02); A61B 2017/12054 (2013.01); A61B 2090/3966 (2016.02)] | 12 Claims |

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1. A tubular braid of an aneurysm implant, the tubular braid comprising:
an open end;
a pinched end;
a predetermined shape in which the braid comprises:
a first segment extending from the open end to a first inversion,
a second segment extending from the first inversion to a second inversion,
a sack, formed from the second segment, comprising an opening approximate the first inversion, and
a third segment extending from the second inversion to the pinched end, in which each of the second segment and the third segment are configured to form a substantially semispherical shape, and in which the third segment is configured to be surrounded by the second segment; and
an implanted shape, based on the predetermined shape, in which the tubular braid is stable when constricted by a substantially spherical cavity, and in which at least a portion of the first segment is configured to be positioned to contact a cavity wall of the substantially spherical cavity, a proximal inversion corresponding to the first inversion of the predetermined shape is configured to be positioned at an entrance to the substantially spherical cavity, the sack is configured to be positioned within the substantially spherical cavity, the opening of the sack is occluded to thereby inhibit access to the sack via the opening,
wherein:
in the predetermined shape, the tubular braid is cylindrically symmetrical about a central axis and the second segment comprises a columnar section extending in a proximal direction from the sack, constricted about the central axis, and defining the opening of the sack, and
in the implanted shape, the columnar section is twisted about the central axis.
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