Embolic devices and methods of manufacturing same
AssigneesStryker Corporation, Stryker European Operations Limited
InventorsStephen Porter, Andrew S. Lee
Life of this patent
Estimating the term…
Abstract
A flat embolic braid having a first side comprising a first side surface, and a second side comprising a second side surface facing in an opposite direction than the first side surface, the braid having an elongated constrained configuration for being deployed through a delivery catheter, and a three-dimensional unconstrained configuration, wherein in the three-dimensional unconstrained configuration, the braid assumes a plurality of successive loops in which the braid is at least partially twisted between successive loops of the plurality, so that the first side surface faces externally of each loop, and the second side surface faces an interior of each loop, respectively, regardless of a change in direction and/or orientation of the braid.
Claims20
A method of manufacturing an embolic device, the method comprising:
- providing a mandrel having a plurality of extending posts;
- providing an elongate flat member having a longitudinal axis, a first side comprising a first side surface, and a second side comprising a second side surface, the first and second sides being reverse to each other with the first side surface and second side surface facing in opposite directions, the elongate flat member having an elongated constrained configuration for being deployed through a delivery catheter to a targeted vascular site;
- winding the flat member at least partially around a first extending post of the plurality of extending posts such that the second side surface of the flat member is in contact with the first extending post and the first side surface faces away from the first extending post;
- partially twisting the flat member about its longitudinal axis as it extends from the first extending post to a second extending post of the plurality of extending posts and winding the flat member at least partially around the second extending post such that the second side surface of the flat member is in contact with the second extending post and the first side surface faces away from the second extending post;
- and
- heat treating the elongate flat member while wound on the mandrel to provide a three-dimensional unconstrained configuration to the flat member comprising a plurality of successive loops in which the elongate flat member is at least partially twisted about its longitudinal axis between each loop of the plurality of loops.
A method of manufacturing an embolic device, the method comprising:
- providing a mandrel having a plurality of extending posts;
- providing an elongate flat member having a longitudinal axis, the flat member having a ribbon-like structure having a width significantly exceeding its thickness, a first side comprising a first side surface, and a second side comprising a second side surface, the first and second sides being reverse to each other with the first side surface and second side surface facing in opposite directions, the elongate flat member having an elongated constrained configuration for being deployed through a delivery catheter to targeted vascular site;
- winding the flat member at least partially around a first extending post of the plurality of extending posts such that the second side surface of the flat member is in contact with the first extending post and the first side surface faces away from the first extending post;
- partially twisting the flat member about its longitudinal axis about 120° as it extends from the first extending post to a second extending post of the plurality of extending posts and winding the flat member at least partially around the second extending post such that the second side surface of the flat member is in contact with the second extending post and the first side surface faces away from the second extending post;
- and
- heat treating the elongate flat member while wound on the mandrel to provide a three-dimensional unconstrained configuration to the flat member comprising a plurality of successive loops in which the elongate flat member is at least partially twisted about its longitudinal axis between each loop of the plurality of loops.
Dependencies are inferred from the claim text.