Advanced endovascular graft and delivery system
Inventors
Vinluan, Jenine S. • STEPHENS, William P. • Geusen, Mark • Poppe, Carl H. • Staudenmayer, Christopher L • Chobotov, Michael V. • Watson, James R. • Woodson, Teresa
Assignees
Interested in licensing this patent?
MTEC can help explore whether this patent might be available for licensing for your application.
Publication Number
US-12004980-B2
Publication Date
2024-06-11
Expiration Date
Abstract
Embodiments are directed in part to endovascular prostheses and methods of deploying same. Embodiments may be directed more specifically to stent grafts and methods of positioning and deploying such devices within the body of a patient.
Core Innovation
The invention relates to an endovascular stent graft delivery system and related deployment approach for delivering a stent graft that includes a stent portion and a main graft body having an inner lumen. A delivery catheter includes an elongate shaft with the stent graft loaded on the delivery catheter such that the elongate shaft is disposed within the inner lumen. An expandable device is disposed on the elongate shaft within the inner lumen and is configured to fully radially expand within the inner lumen to radially expand the main graft body while the stent portion is radially constrained during expansion.
A constraining device is configured to radially constrain the stent portion in a radially constrained state while the main graft body is radially expanded. The expandable device is configured to be expanded prior to deployment of the stent portion of the stent graft, so that the main graft body is radially expanded with the stent portion constrained. In example refinements described by the claims, the stent portion includes a proximal stent portion and a distal stent portion, and the proximal stent portion can include at least one barb extending radially outward.
The expandable device is further described as including an expandable portion disposed within the inner lumen and configured to reach a radially expanded state using alternative expandable mechanisms. In some embodiments, the expandable device comprises an inflatable structure with a collapsed deflated state and an enlarged inflated state having a substantially cylindrical configuration including vias that extend from ports in a proximal surface to respective ports in a distal surface. Other expandable device configurations include an expanded basket with elongate tines that contract and bow radially outward in a substantially concentric arrangement when expanded, including expansion due to an axial compressive force applied to at least one end of the tines.
Claims Coverage
The document includes three independent claims. Across these independent claims, the main inventive features are staged expansion of an expandable device prior to deployment of a radially constrained stent portion, use of a constraining device to maintain the stent portion in a radially constrained state during main graft expansion, and centering toward a longitudinal axis using expansion of the expandable device.
Staged main graft expansion with expandable device prior to stent portion deployment
A delivery system with a stent graft loaded on a delivery catheter such that an elongate shaft is disposed within an inner lumen, and an expandable device disposed on the elongate shaft within the inner lumen, wherein the expandable device is configured to fully radially expand within the inner lumen to radially expand the main graft body, and wherein the expandable device is configured to be expanded prior to deployment of the stent portion of the stent graft.
Radially constraining device during main graft radial expansion
A constraining device configured to radially constrain the stent portion in a radially constrained state while the main graft body is radially expanded.
Centering the delivery system by expanding the expandable device toward a longitudinal axis
A method of centering a delivery system during deployment of a stent graft by positioning the delivery catheter within a patient's vessel with the expandable device in a radially contracted state, expanding the expandable device to a radially expanded state within the inner lumen of the main graft body to center the elongate shaft and stent graft toward a longitudinal axis of the patient's vessel, and deploying a stent so as to engage an inner luminal wall of the patient's vessel after expanding the expandable device, wherein said stent of the stent graft is in a constrained state when the expandable device is fully expanded.
Expandable device including inflatable structure with collapsed deflated state and enlarged inflated state
A delivery system wherein the expandable device comprises an inflatable structure including a collapsed deflated state and an enlarged inflated state with a substantially cylindrical configuration including vias extending from ports in a proximal surface to respective ports in a distal surface, wherein the constraining device is configured to radially constrain the stent portion in a radially constrained state while the main graft body is fully radially expanded, and wherein the expandable device is configured to be expanded prior to deployment of the stent portion of the stent graft.
Across the independent claims, the core coverage is directed to delivering and deploying a stent graft using a delivery catheter and an expandable device that radially expands the main graft body prior to deployment of a stent portion that is maintained in a radially constrained state by a constraining device. A further independent claim covers centering the delivery system toward a longitudinal axis by expanding the expandable device prior to engaging the vessel wall. Another independent claim specifies an inflatable expandable device architecture with a collapsed deflated state and an enlarged inflated state including vias.
Stated Advantages
Not explicitly described in patent.
Documented Applications
Not explicitly described in patent.
Interested in licensing this patent?