摘要:
A method for treating a bifurcation aneurysm, the aneurysm having an aneurysm neck, by positioning a first mechanically expandable device in a first bifurcation branch proximate to the aneurysm neck; positioning a second mechanically expandable device in a second bifurcation branch proximate to the aneurysm neck; and expanding the mechanically expandable devices to constrict the aneurysm neck such that blood circulation to the bifurcation aneurysm is reduced.
摘要:
In some embodiments, an apparatus, for reducing or stopping flow through a tubular structure of a patient, includes an elongate member arranged to form a frame having a distal and proximal opening and configured to be positioned within a lumen of the tubular structure. The frame includes a proximal, distal, and middle portion. The distal portion is tapered such that an outer cross sectional dimension (OCSD) of the distal opening is less than an OCSD of the middle portion. The frame is configured to be inverted such that the distal portion moves within and toward the middle portion for removing the frame from within the lumen. The apparatus also comprises a flow reducing member coupled to the frame such that when the frame is positioned within the lumen, the flow reducing member substantially reduces or totally obstructs flow of at least one of emboli and fluid flowing through the lumen.
摘要:
A method for treating a bifurcation aneurysm, the aneurysm having an aneurysm neck, by positioning a first mechanically expandable device in a first bifurcation branch proximate to the aneurysm neck; positioning a second mechanically expandable device in a second bifurcation branch proximate to the aneurysm neck; and expanding the mechanically expandable devices to constrict the aneurysm neck such that blood circulation to the bifurcation aneurysm is reduced.
摘要:
An endovascular device (10) for treatment of a bodily vessel (5) of a patient at a surgical site, the endovascular device (10) comprising: a mechanically expandable device (11) expandable from a first position to a second position, said mechanically expandable device (11) is expanded radially outwardly to the second position such that the circumferential surface of said mechanically expandable device (11) engages with the inner surface of the vessel (5) so as to maintain a fluid pathway through said vessel (5); and a membrane (15) secured to a portion of the circumferential surface of said mechanically expandable device (11); wherein at least one capture agent (20, 21) is permanently attached to the lumenal surface of the membrane (15) to capture a predetermined target component from blood passing through the fluid pathway; and at least one signal agent (22) is permanently attached to the lumenal surface of the membrane (15) to signal the captured target component to up regulate or down regulate a cell function of the captured target component to enhance endothelialization and healing.
摘要:
A device for delivering an expandable member to a luminal structure in a patient is described. In some embodiments, the device has a carrier member, with a carrier lumen extending at least partially therethrough. The device can have an elongate member that extends through the carrier lumen across a first notch in the carrier member. The device can have an expandable member that expands within and engages the luminal structure, can be carried by the carrier member, and has a first portion that fits within the first notch. When the elongate member extends through the carrier lumen and across the first notch, the elongate member secures the first portion to the carrier member. The elongate member is configured to move axially through the carrier lumen such that the elongate member permits release of the first portion from the carrier member and expansion of at least part of the expandable member.
摘要:
A method for treating a bifurcation or trifurcation aneurysm (201) occurring on a first artery, the first artery and a second artery joining to a third artery, the method comprising: inserting a medical device (202) such that it is at least partially located in the first artery and is at least partially located in the third artery; expanding the medical device (202) from a first position to a second position, said medical device (202) is expanded radially outwardly to the second position such that the exterior surface of said medical device (202) engages with the inner surface of the first and third arteries so as to maintain a fluid pathway through said arteries; and positioning the medical device (202) such that a membrane (203) of the medical device (202) is located against an aneurysm neck of the aneurysm (201) to obstruct blood circulation to the aneurysm (201) when the medical device (202) is expanded to the second position, and at least a portion of the membrane (203) is secured to the medical device (202) to maintain the position of the membrane (203) relative to the medical device (202) when expanded to the second position; wherein the membrane (203) is permeable and porous, the size of the pores of the membrane (203) and the ratio of the material surface area of the membrane (203) being such that blood supply to perforators and/or microscopic branches of main brain arteries is permitted to improve healing of the first artery but blood supply to the aneurysm (201) is prevented.
摘要:
Embodiments of an endovascular device and of methods for treating an aneurysm therewith are described. In certain embodiments, an endovascular device includes a distal assembly coupled to a flow reducing member. In some embodiments, the distal assembly is composed of multiple engagement members that, when deployed within an aneurysm, engage an inner surface of the aneurysm. In certain embodiments, the engagements members are substantially parallel to a central axis of the distal assembly in a first position and shift away from the central axis to a second position, and the distal ends of some engagement members are substantially curled when in the second position. In certain embodiments, the flow-reducing member reduces blood flow from a blood vessel into the aneurysm. In certain embodiments the flow reducing member includes a membrane, which can include a porous section.
摘要:
A medical device for insertion into a bodily vessel to treat an aneurysm (201), the device comprising: a mechanically expandable device (202) expandable from a first position to a second position, said mechanically expandable device (202) is expanded radially outwardly to the second position such that the exterior surface of said mechanically expandable (202) engages with the inner surface of the vessel so as to maintain a fluid pathway through said vessel; and a membrane (203) expandable from a first position to a second position in response to expansion of said mechanically expandable device (202), said membrane (203) obstructing blood circulation to the aneurysm (201) when expanded to the second position, and at least a portion of the membrane (203) is secured to the mechanically expandable device (202) to maintain the position of the membrane (203) relative to the mechanically expandable device (202) when expanded to the second position.
摘要:
An implantable mechanical device for insertion into a passage, where the device is made from a platinum alloy selected from the group consisting of platinum:iridium alloy, platinum:tungsten alloy, platinum:rhodium:ruthenium alloy, platinum:rhodium alloy and platinum:nickel alloy.