Implantable superelastic anastomosis device
View Patent ↗A one piece anastomosis device is disclosed which is formed of a superelastic or pseudoelastic material which self deforms or self deploys from an insertion configuration to a tissue holding configuration. The device in a deployed state preferably includes an inner tissue penetrating flange which penetrate and retains an everted graft vessel and an outer flange. The self deploying anastomosis device does not rely on a temperature transformation to achieve deployment.
1. A system for performing anastomosis between a graft vessel and a target vessel, comprising:
an anastomosis device, comprising a body having at least one flange, wherein said body is composed at least partially of superelastic material, and wherein said body has a lumen therethrough; and
a deployment tool configured to deploy said anastomosis device, comprising
a deployment tube, and
a retainer tube slidable relative to and positioned within said deployment tube,
wherein the distal end of said retainer tube is configured to engage said anastomosis device; wherein the distal end of said retainer tube is detachably connected to said anastomosis device;
wherein at least part of said anastomosis device is positioned between said deployment tube and said retainer tube at a location at which a line radially extending from and perpendicular to the longitudinal centerline of said deployment tube intersects said deployment tube, said retainer tube and said anastomosis device.
2. The system of claim 1 , wherein the distal end of said retainer tube abuts the proximal end of said anastomosis device.
3. The system of claim 1 , wherein relative motion of said retainer tube and said deployment tube allows said anastomosis device to self-deform from an constrained configuration to a deployed configuration.
4. The system of claim 1 , wherein said deployment tube and said retainer tube are substantially concentric.
5. The system of claim 1 , wherein said body is substantially tubular.
6. The system of claim 1 , wherein said superelastic material is nickel-titanium alloy.
7. The system of claim 1 , wherein said body, said inner flange members and said outer flange members are self-deformable from an constrained configuration to a deployed configuration.
8. The system of claim 7 , wherein at least part of each said inner flange member is further from a longitudinal axis of said body in said deployed configuration than in said undeployed configuration.
9. The system of claim 1 , wherein said body has a first end and a second end, and wherein said outer flange members are spaced substantially evenly along the perimeter of said first end.
10. The system of claim 1 , wherein said body has a first end and a second end, and wherein said inner flange members are spaced substantially evenly along the perimeter of said second end.