摘要:
The present invention is directed to an implantable vascular prosthesis configured for use in a wide range of applications, such as treating aneurysms, maintaining patency in a vessel, and allowing for the controlled delivery of therapeutic agents to a vessel wall. The prosthesis comprises one or more helical sections coupled to one or more anchoring sections having a generally zig-zag or cell-like configuration. The prosthesis is configured to conform to a vessel wall without substantially remodeling the vessel, and further is configured to be precisely deployed in a vessel without shifting or foreshortening during deployment.
摘要:
Embolic protection and plaque removal apparatus and methods are provided wherein an aspiration device aspirates, filters and reperfuses blood using a closed fluid circuit having a bi-directional working lumen. The plaque removal device includes a plurality of self-expanding cutting elements that form cage that self-centers within the blood vessel to reduce the risk of trauma to the vessel lining.
摘要:
The present invention is directed to a delivery catheter for use in deploying a vascular prosthesis having a self-expanding helical section for use in a wide range of interventional applications. The delivery catheter comprises an elongated member having a helical ledge with a pitch selected to impose a predetermined amount of foreshortening on the vascular prosthesis during deployment. Methods of making and using the delivery catheter of the present invention also are provided.
摘要:
A vascular prosthesis comprises generally tubular body placeable in contracted and expanded states and has an axial length and a circumferential dimension in the expanded state. The body includes a series of circumferential elements having first lengths. First and second connectors have connector lengths and join alternating ends of adjacent circumferential elements. The first length plus the connector lengths joined thereto equal a total circumferential length. Each connector length is between 2.5% and 25% of the total circumferential length. Adjacent circumferential elements and connectors extending therefrom are separated by a stress relief slot having a relief slot length of more than 50% and less than 95% of the total circumferential length. The stress relief slots have narrow width portions over a majority of the relief slot lengths, the narrow width portions having lateral dimensions of no greater than about 3 mm.
摘要:
A delivery system for an implantable vascular prosthesis is provided for a vascular prosthesis including at least first and second helical sections having alternating directions of rotation that are coupled to one another at apices. The delivery system includes an elongate body, a plurality of retainers and an outer sheath. The plurality of retainers are configured to temporarily retain a plurality of inner wound apices of the vascular prosthesis. The outer sheath is configured to retain the vascular prosthesis in a contracted state on the elongate body.
摘要:
The present invention is directed to an implantable vascular prosthesis configured for use in a wide range of applications, such as treating aneurysms, maintaining patency in a vessel, and providing controlled delivery of therapeutic agents to a vessel wall. The prosthesis comprises a helical body having a plurality of turns, wherein the proximal and distal edges of the turns of the prosthesis has a pattern that interdigitates when the prosthesis assumes the deployed configuration. The prosthesis optionally may comprise a radially expanding distal portion coupled to the helical body for facilitating placement of the prosthesis within a body vessel.
摘要:
A vascular prosthesis comprises generally tubular body placeable in contracted and expanded states and has an axial length and a circumferential dimension in the expanded state. The body includes a series of circumferential elements having first lengths. First and second connectors have connector lengths and join alternating ends of adjacent circumferential elements. The first length plus the connector lengths joined thereto equal a total circumferential length. Each connector length is between 2.5% and 25% of the total circumferential length. Adjacent circumferential elements and connectors extending therefrom are separated by a stress relief slot having a relief slot length of more than 50% and less than 95% of the total circumferential length. The stress relief slots have narrow width portions over a majority of the relief slot lengths, the narrow width portions having lateral dimensions of no greater than about 3 mm.
摘要:
The present invention is directed to a delivery catheter for use in deploying a vascular prosthesis having a self-expanding helical section for use in a wide range of interventional applications. The delivery catheter comprises an elongated member having a helical ledge with a pitch selected to impose a predetermined amount of foreshortening on the vascular prosthesis during deployment. Methods of making and using the delivery catheter of the present invention also are provided.
摘要:
An implantable vascular prosthesis is provided for use in a wide range of applications wherein at least first and second helical sections having alternating directions of rotation are coupled to one another. The prosthesis is configured to conform to a vessel wall without substantially remodeling the vessel, and permits accurate deployment in a vessel without shifting or foreshortening.