Systems, devices, and methods for coupling a prosthetic implant to a fenestrated body

Inventors

Torrance, Casey • Eubanks, Shannon

Assignees

Bolton Medical Inc

Abstract

Devices, systems, and methods for implanting a patient-specific prosthesis at a treatment site in a patient are disclosed herein. In some embodiments, a patient-specific prosthesis includes a tubular graft and a coupling member. A fenestration can be disposed in the tubular graft, the fenestration corresponding to a predicted branch blood vessel location. The coupling member can be disposed about the fenestration. The coupling member can include a coil configured to expand from a first configuration to a second configuration in response to the application of an expanding force. The coil can be configured to contract to a third configuration upon removal of the expanding force.

Core Innovation

The invention relates to a patient-specific prosthesis for implantation at a treatment site in a patient. The prosthesis includes a tubular graft with a fenestration disposed in the tubular graft, where the fenestration corresponds to a predicted branch blood vessel location. A coupling member is disposed about the fenestration, and the coupling member includes a coil configured to expand from a first configuration to a second configuration in response to an expanding force and to contract to a third configuration upon removal of the expanding force.

A shape memory core is disposed in the coil. The prosthesis further includes a branch stent configured to be coupled to the fenestration, where the branch stent includes an engagement portion for engaging with the coupling member and a flexible tail portion extending from the engagement portion. The engagement portion includes a proximal portion, an intermediate portion, and a distal portion, with the intermediate portion having a second diameter that is less than the first diameter and the third diameter in an expanded state.

In a system for treating aneurysms, the tubular graft and fenestration correspond to a predicted branch blood vessel location, and the coupling member configured with the coil and shape memory core transitions between configurations. A radially expandable branch stent is coupled to the fenestration, and an expandable member is configured to transition the radially expandable branch stent from a collapsed state to an expanded state. The expandable member includes a first portion configured to expand the engagement portion and a second portion configured to expand the flexible tail portion.

A method is also provided that disposes a branch stent within a fenestration of a tubular graft such that an engagement portion is aligned with a coupling member disposed about the fenestration. The method includes radially expanding the branch stent via an expandable member disposed within the branch stent to expand the coupling member from the first configuration to the second configuration, and then removing the expanding force to allow the coupling member to contract to the third configuration. During the coupling member transition from the second configuration to the third configuration, the coupling member applies a contracting force to the branch stent.

Claims Coverage

The identified independent claims cover four inventive features: a patient-specific tubular graft with a fenestration at a predicted branch blood vessel location, a coil-based coupling member with a shape memory core that expands and contracts, a branch stent with an engagement portion and flexible tail portion, and a method of expanding and then contracting the coupling member to apply forces to the branch stent.

Coverage centers on a patient-specific prosthesis with a fenestration aligned to a predicted branch blood vessel location, a coil-based coupling member with a shape memory core, and a branch stent with an engagement portion and a flexible tail portion. The method claim follows the same sequence of alignment, expansion, and contraction to apply a contracting force to the branch stent.

Stated Advantages

Documented Applications