Abstract:
The present invention provides apparatus and methods for treating a vascular condition by restoring patency to a vessel while reducing the likelihood that emboli become dislodged into the bloodstream. In a first embodiment, the apparatus comprises a graft having proximal and distal regions, a first support member attached to the distal region of the graft, and a second support member attached to the proximal region of the graft. The first and second support members may comprise first and second stents, respectively. The first stent is deployed distal to a vascular condition, and the second stent is deployed proximal to a vascular condition, such that the graft spans the length of the vascular condition to entrap emboli during treatment of the vascular condition. In an alternative embodiment, the first stent is adapted to be deployed within a vessel at a location distal to the vascular condition, and the graft is adapted to be everted to form a pocket adapted to entrap emboli dislodged during treatment of the vascular condition. The second stent then may be subsequently deployed proximal to the vascular condition, such that emboli trapped within the graft pocket are effectively sealed off from the bloodstream.
Abstract:
An endoluminal prosthetic device is formed by attaching a stent (14) to a graft (12). The stent is a plurality of struts (15) and joints or apices (16) between the struts. At least one apex of the stent may be attached to the graft with at least two stitches (18) sharing a penetration (19) in the graft. This more firmly anchors the stent to the graft, preventing separation of the stent from the graft. By using at least one opening or penetration in the graft for more than one stitch, the number of penetrations or openings in the graft is minimized. This has the advantage of maintaining as much as possible the integrity of the graft while minimizing leakage and complications.
Abstract:
The present invention provides apparatus and methods for treating a vascular condition by restoring patency to a vessel while reducing the likelihood that emboli become dislodged into the bloodstream. In a first embodiment, the apparatus comprises a graft having proximal and distal regions, a first support member attached to the distal region of the graft, and a second support member attached to the proximal region of the graft. The first and second support members may comprise first and second stents, respectively. The first stent is deployed distal to a vascular condition, and the second stent is deployed proximal to a vascular condition, such that the graft spans the length of the vascular condition to entrap emboli during treatment of the vascular condition. In an alternative embodiment, the first stent is adapted to be deployed within a vessel at a location distal to the vascular condition, and the graft is adapted to be everted to form a pocket adapted to entrap emboli dislodged during treatment of the vascular condition. The second stent then may be subsequently deployed proximal to the vascular condition, such that emboli trapped within the graft pocket are effectively sealed off from the bloodstream.
Abstract:
An endoluminal prosthetic device for placement in a body lumen is formed by stitching stents to a graft. A first or anchoring stent (12) is used for securing a graft made of biocompatible material that forms at least one lumen. There is also a second stent (14). The first and second stents each include a plurality of struts (15, 25) and apices (16, 26) between the struts. At least two of the apices in each of the first and second stents are secured to the graft by stitches (21, 23). A running suture (24) links at least one stitch of the first stent and one stitch of the second stent. The running suture linking the first stent and the second stent adds strength to the stitches and better secures the first stent to the device. The endoluminal prosthetic device may be used in an aortic vessel to treat stenoses or aneurysms.
Abstract:
Devices and methods useful for injecting therapeutics into the body of a. patient are illustrated and described herein. In certain aspects, needle assemblies comprising a needle having a needle shaft with one or more side openings and a needle sheath slidably moveable along the needle shaft to selectively expose or cover all or a portion of the one or more side openings are provided. Such assemblies may include an interference fit between the needle sheath and the needle shaft and or a seal positioned around the needle shaft proximal of the plurality of one or more side openings and configured to prevent fluid from leaking between the needle sheath and the needle shaft and beyond a proximal end of the needle sheath.
Abstract:
The invention relates to a method for producing a radially expandable prosthesis by laser cutting a pattern in a tubular member, which member has an outer diameter at least as great as the expanded diameter of the prosthesis. The prosthesis may be a Z-stent which can be cut out to have integral barbs or notches along its struts. The apexes between the struts may be relatively thin.
Abstract:
A medical grasping device (1 ) has an elongate control member (9) with a grasping member ( 17) proximal to its distal tip. An outer sheath (3) with a passageway therethrough surrounds the elongate control member and is relatively movable with respect to the control member. A control assembly (2) disposed at a proximal end of said outer sheath has a fixed handle (5) and a sliding handle (7) and the proximal end of the elongate control member is fixed to the sliding handle to move the control member. The grasping member (17) has a plurality of pre¬ formed wire loops (50, 52, 54, 56) which self-deploy transversely upon emerging from said distal end of said outer sheath. Each wire loop is fastened to substantially opposite sides of the elongate control member so that each of said wire loops is substantially semi-circular upon full deployment and the respective ends (27, 29)of each wire loop extend substantially in opposite directions from the elongate control member.
Abstract:
A medical grasping device (1 ) has an elongate control member (9) with a grasping member ( 17) proximal to its distal tip. An outer sheath (3) with a passageway therethrough surrounds the elongate control member and is relatively movable with respect to the control member. A control assembly (2) disposed at a proximal end of said outer sheath has a fixed handle (5) and a sliding handle (7) and the proximal end of the elongate control member is fixed to the sliding handle to move the control member. The grasping member (17) has a plurality of pre¬ formed wire loops (50, 52, 54, 56) which self-deploy transversely upon emerging from said distal end of said outer sheath. Each wire loop is fastened to substantially opposite sides of the elongate control member so that each of said wire loops is substantially semi-circular upon full deployment and the respective ends (27, 29)of each wire loop extend substantially in opposite directions from the elongate control member.
Abstract:
An endoluminal device (170) comprises a stent and a tubular graft supported by the stent. The graft has a proximal (174) and a distal opening (176) and comprises a synthetic material and a bioremodelable material. The bioremodelable material is disposed on an exterior surface in at least one band (171) adjacent at least one of the proximal and distal openings.
Abstract:
An endoluminal prosthetic device for placement in a body lumen is formed by stitching stents to a graft. A first or anchoring stent is used for securing a graft made of biocompatible material that forms at least one lumen. There is also a second stent. The first and second stents each include a plurality of struts and apices between the struts. At least two of the apices in each of the first and second stents are secured to the graft by stitches. A running suture links at least one stitch of the first stent and one stitch of the second stent. The running suture linking the first stent and the second stent adds strength to the stitches and better secures the first stent to the device. The endoluminal prosthetic device may be used in an aortic vessel to treat stenoses or aneurysms.