초록 ▼

A trocar useful for forming an incision in a target vessel for placement of an anastomosis device which may have an inner flange formed by radial expansion of the device and an outer flange formed by axial compression of the device. The trocar can have a smaller size during formation of the incision

A trocar useful for forming an incision in a target vessel for placement of an anastomosis device which may have an inner flange formed by radial expansion of the device and an outer flange formed by axial compression of the device. The trocar can have a smaller size during formation of the incision and a larger size when retracted over a deployment tool used to deploy the anastomosis device.

대표청구항 ▼

1. A device for performing an anastomosis procedure between a graft vessel and a target vessel, comprising:a deployment tool; an anastomosis device detachably connected to said deployment tool, said anastomosis device deformable to a deployed state; and a sheath connected to said deployment tool; an

1. A device for performing an anastomosis procedure between a graft vessel and a target vessel, comprising:a deployment tool; an anastomosis device detachably connected to said deployment tool, said anastomosis device deformable to a deployed state; and a sheath connected to said deployment tool; and a cutting element connected to said sheath, said cutting element configured to form an opening in the wall of the target vessel; wherein said deployment tool is configured to place said anastomosis device at least partly into the opening and deploy said anastomosis device to the deployed state, and said sheath is removed from the opening outside of the graft vessel. 2. A device for piercing the wall of a target vessel, comprising:a tubular sheath having an edge at its distal end and a longitudinal axis; cutting element slidable within said tubular sheath along said longitudinal axis and moveable away from said longitude axis; and a cable attached to said cutting element; wherein said cutting element is insertable through the wall of the target vessel and retractable by said cable to compress the wall of the target vessel against said edge, wherein a portion of the wall of the target vessel is removed. 3. The device of claim 2, wherein said cutting element comprises:a tapered tip; an anvil surface behind said tapered tip; and a shaft extending from said anvil surface. 4. The device of claim 2, wherein said edge is substantially circumferential.5. The device of claim 2, wherein said cutting element comprises at least two pieces.6. The device of claim 2, wherein a storage position is defined relative to said tubular sheath, and wherein said cutting element is movable to said storage position.7. The device of claim 2, wherein said cutting element further comprises a pin extending therefrom, and wherein said tubular sheath comprises a slot therein, said pin movable within said slot.8. The device of claim 7, further comprising a stop at a proximal end of said slot.9. The device of claim 7, wherein a storage position is defined relative to said tubular sheath, and wherein said slot is defined in said tubular sheath to direct said cutting element into said storage position.10. The device of claim 7, wherein said cutting element further comprises an inclined surface on a proximal end.11. The device of claim 2, wherein said tubular sheath includes at least one opening in its side, and wherein said cutting element is moveable away from said longitudinal axis through said opening.12. A device for piercing the wail of a target vessel and removing a tissue ring therefrom, comprising:a tubular sheath including a lumen therein and a longitudinal axis; and a cutting element and moveable slidable within said tubular sheath along said longitudinal axis away from said longitudinal axis, wherein said cutting element cooperates with said tubular sheath to remove the tissue ring from the wall of the target vessel and move the tissue ring out of said lumen. 13. The device of claim 12, wherein said cutting element traps and retains the tissue ring.14. The device of claim 12, wherein at least part of the distal end of said tubular sheath is sharpened.15. The device of claim 12, wherein the distal end of said cutting element is tapered.16. The device of claim 12, wherein said tubular sheath includes at least one opening in its side, and wherein said cutting element is moveable away from said longitudinal axis through said opening.