Anchor device for vascular anastomosis
The present disclosure relates to a medical anchor device and methods of use for providing an improved device for intraluminally directed vascular anastomosis. The anchor device includes a generally tubular graft having a flange disposed at one end thereof, where a portion of the graft extends through the flange. The flange includes a wire frame made of a resilient material and a thin membrane covering or overlaying the wire frame, where the wire frame is self-expanding when deployed within a lumen. The device may be deployed within the lumen at an anastomotic site without a need for sutures, staples, clips, or other mechanical attachment means that may cause further injury.
1. A medical device for use in an anastomosis procedure in a body lumen of a patient, the device comprising:
a generally tubular graft having a proximal portion and an opposite distal portion; and
a self-expanding flange disposed adjacent the distal portion of the tubular graft, the flange including an opening in communication with the graft to form a fluid passageway through the flange, the flange further including a wire frame having a plurality of resilient arms radiating outwardly from a central portion of the wire frame, and a membrane overlaying the wire frame;
wherein a segment of the distal portion of the tubular graft extends through the flange and outwardly therefrom; and
wherein the self-expanding flange is configured to expand within the body lumen of the patient and is anchored against one or more lumen walls when the medical device is deployed at an anastomotic site.
2. The medical device of claim 1 , wherein a portion of the tubular graft comprises a wire stent disposed between a first graft layer and a second graft layer to reinforce the tubular graft.
3. The medical device of claim 2 , wherein the portion of the tubular graft comprising the wire stent is disposed adjacent the self-expanding flange.
4. The medical device of claim 2 , wherein the portion of the tubular graft comprising the wire stent is disposed adjacent the self-expanding flange, and wherein the flange, once actuated, has a member that closely approximates an inner and outer diameter of the body lumen to create a seal at the anastomotic site.
5. The medical device of claim 1 , wherein the plurality of resilient arms are each formed from a shape-memory alloy.
6. The medical device of claim 1 , wherein the membrane overlaying the wire frame comprises polytetrafluoroethylene.
7. The medical device of claim 1 , wherein the graft includes a central axis extending through a central lumen of the graft, and wherein the self-expanding flange is disposed in an angular orientation relative to the central axis of the graft when the medical device is deployed within the body lumen of the patient.
8. The medical device of claim 1 , wherein the self-expanding flange is collapsible to a first state in response to application of force, and expandable to a second state in response to an absence of force.
9. The medical device of claim 1 , wherein the flange is configured to create a seal with the one or more lumen walls to prevent fluid leakage.
10. The medical device of claim 1 , wherein the flange is retractable, thereby allowing the device to be removed from the body lumen.
11. A medical device assembly for use in an anastomosis procedure in a body lumen of a patient, the assembly comprising:
an anchor device including,
a generally tubular graft having a proximal portion and an opposite distal portion; and
a self-expanding flange disposed adjacent the distal portion of the tubular graft, the flange including an opening in communication with the graft to form a fluid passageway through the flange, the flange further including a wire frame having a plurality of resilient arms radiating outwardly from a central portion of the wire frame, and a membrane overlaying the wire frame; and
a delivery sheath disposed around at least a portion of the anchor device such that the anchor device is longitudinally displaceable within the delivery sheath, wherein upon displacement of the self-expanding flange into a lumen of the delivery sheath the plurality of resilient arms collapse toward each other, and wherein upon displacement of the self-expanding flange out of the lumen of the delivery sheath and into the body lumen of the patient, the plurality of resilient arms are displaced away from each other,
wherein a segment of the distal portion of the tubular graft extends through the flange and outwardly therefrom; and
wherein the self-expanding flange is configured to expand within the body lumen of the patient and is anchored against one or more lumen walls.
12. The medical device assembly of claim 11 , wherein the segment of the distal portion of the tubular graft is configured to be disposed within a first vessel and the proximal portion of the tubular graft is configured to be disposed within a second vessel branching from the first vessel.