Vaso-occlusive devices including a friction element
AssigneeStryker European Operations Holdings LLC
InventorsMichael P. Wallace, E. Skott Greenhalgh
Life of this patent
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Abstract
Vaso-occlusive apparatuses, including implants, and methods of using them to treat aneurysms. The vaso-occlusive implants described herein include one or more soft and expandable braided member coupled to a pushable member such as a coil that maybe inserted and retrieved from within an aneurism using a delivery catheter as well as a friction element between the soft braided member and the coil. The friction element allows the relatively soft and elongate implant to be pushed out of a cannula without binding up within the cannula.
Claims22
A vaso-occlusive device adapted to be pushed through a delivery catheter and out an open distal end of the delivery catheter, the vaso-occlusive device comprising:
- an elongate braided tubular outer member having a radially compressed configuration when constrained within the delivery catheter, and a radially expanded configuration when pushed out the open distal end of the delivery catheter so as to no longer be constrained within the delivery catheter;
- an elongate pushable inner member disposed within an interior of the braided tubular outer member, wherein the pushable inner member is axially moveable relative to the delivery catheter;
- and
- a friction element disposed between the pushable inner member and the braided tubular outer member, wherein at least a portion of the friction element is configured to generate friction between the pushable inner member and an inner surface of the braided tubular outer member when the vaso-occlusive device is constrained within the delivery catheter so as to move the braided tubular outer member axially relative to the delivery catheter as the pushable inner member is moved axially relative to the delivery catheter, and to release the friction between the pushable inner member and the inner surface of the braided tubular outer member when the braided tubular outer member is in the radially expanded configuration.
Dependencies are inferred from the claim text.