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US 12,672,878 B2Granted
Medical devices for treating a target site and associated method
AssigneeSt. Jude Medical, Cardiology Division, Inc.
InventorsSarah Ellen Drilling, John C Oslund, Mathias C Glimsdale, Xiaoping Gu
Life of this patent
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Abstract
Embodiments of the present invention provide devices and methods for treating various target sites, such as vascular abnormalities. For example, a medical device according to one embodiment includes at least one layer of a fabric of braided strands having proximal and distal ends and a central axis extending therebetween. The medical device has an expanded configuration a generally frustroconical shaped portion at each end. The medical device is configured to be constrained to a reduced configuration for delivery through a diagnostic catheter and to at least partially return, when unconstrained, towards the expanded configuration.
Claims19
A medical device comprising:
- two layers of a fabric of braided strands, the medical device having proximal and distal ends and a central axis extending therebetween and having an expanded preset configuration comprising a generally frustoconical shaped portion at each end, wherein, in the expanded preset configuration, each frustoconical shaped portion comprises first and second ends and a conical portion disposed therebetween, wherein the first ends are generally planar and face one another and have a larger cross-sectional diameter than the second ends, wherein each frustoconical shaped portion includes a cylindrical portion between the first end and the conical portion, wherein the second ends correspond to the proximal and distal ends of the medical device, wherein the ends of the braided strands are secured from unraveling at the proximal and distal ends of the medical device, wherein the medical device is biased towards the expanded preset configuration such that the medical device is configured to self-expand and at least partially return, when unconstrained, towards the expanded preset configuration,
- and wherein the frustoconical shaped portions are shaped to reduce an outer profile of the medical device in an elongated, reduced configuration and to reduce (i) an applied axial force required to constrain the medical device in the reduced configuration within a 4 French (Fr) or 5 Fr 0.038-inch guidewire compatible diagnostic catheter for delivery to a target site and (ii) the applied axial force required to deploy the medical device from the diagnostic catheter at the target site, and
- wherein the medical device further comprises a central portion coupling the first ends of the frustoconical shaped portions, and wherein, in the expanded preset configuration, the central portion has a diameter of between 0.5 mm and 1.5 mm, and the cylindrical portions each have a diameter of between 3 mm and 14 mm.
A method of treating a target site within a body, the method comprising:
- performing a diagnostic procedure implemented using a diagnostic catheter, wherein the diagnostic catheter is a 4 Fr or 5 Fr 0.038-inch guidewire compatible diagnostic catheter;
- providing a medical device including two layers of a fabric of braided strands, the medical device having proximal and distal ends and a central axis extending therebetween and having an expanded preset configuration comprising a generally frustoconical shaped portion at each end, wherein, in the expanded preset configuration, each frustoconical shaped portion comprises first and second ends and a conical portion disposed therebetween, wherein the first ends are generally planar and face one another and have a larger cross-sectional diameter than the second ends, wherein each frustoconical shaped portion includes a cylindrical portion between the first end and the conical portion, wherein the second ends correspond to the proximal and distal ends of the medical device, wherein the ends of the braided strands are secured from unraveling at the proximal and distal ends of the medical device, wherein the medical device is biased towards the expanded preset configuration such that the medical device is configured to self-expand and at least partially return, when unconstrained, towards the expanded preset configuration;
- constraining the medical device from the expanded preset configuration to a reduced configuration for delivery through the same diagnostic catheter with which the diagnostic procedure was implemented, by applying a reduced axial force associated with the generally frustoconical shaped portions at each end of the medical device;
- delivering the medical device through the diagnostic catheter proximate to the target site without withdrawing the diagnostic catheter after the diagnostic procedure;
- and
- deploying the medical device from the diagnostic catheter such that the medical device at least partially returns towards the expanded preset configuration, by applying the reduced axial force associated with the generally frustoconical shaped portions at each end of the medical device,
- wherein the medical device further comprises a central portion coupling the first ends of the frustoconical shaped portions, and wherein, in the expanded preset configuration, the central portion has a diameter of between 0.5 mm and 1.5 mm, and the cylindrical portions each have a diameter of between 3 mm and 14 mm.
4 more elements
Dependencies are inferred from the claim text.