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.
Abstract:
A flexible low profile delivery system (10) for delivery of an expandable intracorporeal device (11), specifically, an endovascular graft, which has at least one belt (21) circumferentially disposed about the device in a constraining configuration. The belt (21) is released by a release member (24), such as a release wire, by retracting the wire from looped ends (81) of the belt (21). Multiple belts (24, 21, 22) can be used and can be released sequentially so as to control the order of release and placement of the endovascular graft (11). An outer protective sheath (53) may be disposed about the endovascular (11) graft while in a constrained state which must first be retracted or otherwise removed prior to release of the graft (11) from a constrained state. The delivery system (10) can be configured for delivery over a guiding device (18) such as a guidewire. The delivery system can also be configured for delivery of bifurcated intracorporeal devices.
Abstract:
Systems and methods for treating diseased bodily lumens involving branched lumen deployment sites include a main graft or stent-graft deployable in a main artery and a vent device or stent-graft deployable in a branch artery to maintain blood flow through the main artery and from the main artery to the branch artery. Systems and methods for treating diseased bodily lumens involving branched lumen deployment sites may also include a main graft or stent-graft deployable in the main artery, a chimney graft or stent-graft deployable in both branch artery and the main artery to the branch artery and a gutter-sealing device associated with the chimney graft to prevent flow of blood among the chimney graft, the main graft and a wall of the main artery.
Abstract:
A system and method of developing better-designed medical devices, particularly prosthesis and more particularly cardiovascular stents and endovascular grafts. The system comprises a geometry generator, a mesh generator, a stress/strain/deformation analyzer, and, optionally, a visualization tool. In one embodiment, the geometry generator receives three-dimensional volumetric data of an anatomical feature and generates a geometric model. The mesh generator then receives such geometric model of an anatomical feature or an in vitro model and a geometric model of a candidate medical device. In another embodiment, the mesh generator only receives a geometric model of the candidate medical device. Using the geometric model(s) received, the mesh generator creates or generates a mesh or a finite element model. The stress/strain/deformation analyzer then receives the mesh, and the material models and loads of that mesh. Using analysis, preferably non-linear analysis, the stress/strain/deformation analyzer determines the predicted stresses, strains, and deformations on the candidate medical device. Such stresses, strains, and deformations may optionally be simulated visually using a visualization tool.
Abstract:
Systems for treating aneurysms provide additional support to an aneurysmal wall by disposing a flexible vascular liner against or in close proximity to the aneurysmal wall. A system (10) comprises a liner (18) having a liner medial wall portion (18A) which is a unitary liner wall and flexibly expansive to conform to the wall (48) of the aneurysm (42). Proximal and distal anchors (22A, 22B) may be associated with the proximal and distal liner portions. The liner inhibits failure of the aneurysmal wall. The liner may also inhibit further growth in diameter of the aneurysm. Aneurysms in single arteries or near branched arteries may be supported by a flexible vascular liner.
Abstract:
An intracorporeal device, such as an endovascular graft, having a tubular section with circumferential or helical radial support members. The radial support members may be inflatable channels which support the tubular structure of the graft and which are appropriately sized and longitudinally spaced to prevent or reduce kinking of the tubular structure upon bending of the tubular structure.
Abstract:
Stent-grafts for treating thoracic aortic aneurysms and abdominal aortic aneurysms include graft portions having inflatable channels and graft extensions. The graft extensions include an undulating wire stent and porous, but substantially fluid impermeable, polytetrafluoroethylene (PTFE) graft materials.
Abstract:
Some embodiments relate in part to endovascular prostheses and methods of deploying same. Embodiments may be directed more specifically to inflatable stent grafts and methods of positioning and deploying such devices within the body of a patient. Some embodiments include inflation devices and methods that allow an inflatable portion of an inflatable stent graft to be inflated from a desired location within the inflatable portion.
Abstract:
A flexible low profile delivery system for delivery of an expandable intracorporeal device, specifically, an endovascular graft, which has at least one belt circumferentially disposed about the device in a constraining configuration. The belt is released by a release member, such as a release wire, by retracting the wire from looped ends of the belt. Multiple belts can be used and can be released sequentially so as to control the order of release and placement of the endovascular graft.
Abstract:
The present invention provides methods and compositions for managing endoleaks in a perigraft space around an endovascular graft. In one embodiment, a blood flow through the endovascular graft is temporarily reduced and an embolic material is delivered into the perigraft space while the blood flow through the endovascular graft is reduced. The embolic material may comprise polyethylene glycol diacrylate, pentaerthyritol tetra 3(mercaptopropionate), and a buffer.