Low profile tissue anchors, tissue anchor systems, and methods for their delivery and use
Tissue anchors include a flat, broad, and large contact surface for engagement with a portion of tissue. Several embodiments of composite tissue anchors include a support element and an overlay element. Tissue anchor assemblies include two or more tissue anchors, a connector, and a cinching mechanism. In some embodiments, the tissue anchors included in the tissue anchor assemblies are of different types, sizes, and/or shapes.
1. A surgical tissue anchor assembly, comprising:
a first tissue anchor, a second tissue anchor, and a connector;
the first and second tissue anchors each including:
a first collar at a first end of a flexible mesh pouch;
a second collar at a second end of the flexible mesh pouch, and the connector passing through the flexible mesh pouch and not through the first and second collars of the first and second tissue anchors;
a frame within the flexible mesh pouch, with the frame having longitudinal resilient struts flared radially outwardly, with the first and second tissue anchors each reconfigurable from a low profile delivery configuration to an expanded deployed position, via outward movement of the resilient struts; and
a stop member on the connector not passable through the first tissue anchor.
2. The surgical tissue anchor assembly of claim 1 with the connector passing through a central area of the mesh pouch of the first and second tissue anchors.
3. The surgical tissue anchor assembly of claim 2 with each tissue anchor further including a bar within the mesh, with the connector passing through the bar.
4. The surgical tissue anchor assembly of claim 1 with the frame retained within the flexible mesh pouch, but not attached to the flexible mesh pouch.
5. The surgical tissue anchor assembly of claim 1 with the first and second tissue anchors slidable along the connector, and wherein the connector comprises suture.
6. The surgical tissue anchor assembly of claim 1 with the frame comprising a tube having longitudinal slits between the struts.
7. The surgical tissue anchor assembly of claim 1 wherein the tissue anchors are flat.
8. A surgical tissue anchor assembly, comprising:
a first tissue anchor, a second tissue anchor, and a connector;
the first and second tissue anchors each including:
flexible mesh pouch;
a frame retained within the flexible mesh pouch, but not attached to the flexible mesh pouch,
the frame comprising longitudinal struts resiliently biased radially outwardly;
with the first and second tissue anchors each reconfigurable from a low profile delivery configuration to an expanded deployed position, via the resilient bias of the struts;
the connector passing through the flexible mesh pouch of each of the first and second tissue anchors, and through a bar retained within the flexible mesh pouch of each of the first and second tissue anchors; with the first and second tissue anchors slidable along the connector; and
a stop member on the connector, with the stop member not passable through the first tissue anchor.
9. The surgical tissue anchor assembly of claim 8 with the bar in each tissue anchor not attached to the flexible mesh pouch.
10. The surgical tissue anchor assembly of claim 9 with the connector comprising absorbable suture and with the first and second tissue anchors slidable along the suture.
11. The surgical tissue anchor assembly of claim 10 with the pouch comprising a tubular mesh sleeve having closed ends, and with the suture not extending through the closed ends.
12. The surgical tissue anchor assembly of claim 11 wherein each closed end has a flat end surface and a cylindrical side wall.
13. The surgical tissue anchor assembly of claim 8 with the connector comprising a suture passing through a central section of the mesh pouch of each of the first and second tissue anchors.
14. The surgical tissue anchor assembly of claim 13 wherein the suture passes through a central opening of the bar.
15. A surgical tissue anchor comprising:
a mesh pouch;
a frame within the mesh pouch, with the frame having longitudinal resilient struts projecting radially outwardly, with the resilient struts holding the mesh pouch in an expanded position, and with the mesh pouch contractable into a low profile delivery position;
a bar retained within the mesh pouch and not attached to the mesh pouch;
a suture passing through a central area of the mesh pouch and through an opening at a central area of the bar.
16. The surgical tissue anchor of claim 15 with the mesh pouch comprising a tubular mesh sleeve having first and second fused ends.
17. The surgical tissue anchor of claim 15 wherein the mesh pouch is flat when in the expanded position.
18. The surgical tissue anchor of claim 15 wherein the bar is rigid and the pouch is flexible.
19. The surgical tissue anchor of claim 15 wherein the suture is bioabsorbable.