Methods and systems for delivering prostheses using rail techniques
Exemplary embodiments provide methods and systems for delivering a prosthesis to a target location in a lumenal system of a patient. At least one tether is secured proximate the target location to serve as a rail, and a prosthesis is advanced along the rail to the target location and secured in place. Exemplary methods and systems provide for repair of the mitral and tricuspid valves, as well as abdominal aortic aneurysms, stomach valves, fallopian tubes and the pulmonary system, among others. Also disclosed are various prostheses suitable for use with the disclosed methods and systems.
1. A method of delivering a prosthesis to an anatomical target location, comprising:
introducing a distal end of a delivery catheter containing the prosthesis to a location proximate the anatomical target location within a patient's vasculature;
deploying the prosthesis from the delivery catheter at the anatomical target location into the patient's vasculature, wherein the prosthesis includes at least one guide rail coupled thereto, the at least one guide rail extending from the prosthesis;
advancing an anchor delivery catheter including an anchor coupled thereto along the at least one guide rail toward the deployed prosthesis, the anchor being preloaded over the at least one guide rail; and
anchoring the anchor into tissue at the anatomical target location to hold the prosthesis in place.
2. The method of claim 1 , further comprising, prior to the introducing step:
anchoring a elongate guide tether into tissue proximate a valve annulus;
anchoring a second elongate guide tether into tissue proximate the valve annulus, the elongate guide tether and second elongate guide tether being distinct from the at least one guide rail; and
wherein the deploying step includes advancing the prosthesis over the elongate guide tether and second elongate guide tether to direct the prosthesis into place proximate the valve annulus.
3. The method of claim 2 , wherein the prosthesis occupies a full circumference of the valve annulus, and further wherein the prosthesis is ring-shaped.
4. The method of claim 2 , wherein the first prosthesis occupies only a portion of a circumferential extent of the valve annulus.
5. The method of claim 2 , wherein the prosthesis defines a plurality of tether guide conduits therethrough, wherein each said tether guide conduit receives a respective elongate guide tether therethrough.
6. The method of claim 1 , wherein the prosthesis defines a fully open channel therethrough to serve as a platform for attaching a second prosthesis.
7. The method of claim 1 , wherein the prosthesis includes a plurality of radiopaque markers disposed about its circumference to facilitate axial and rotational alignment of the prosthesis with respect to surrounding anatomy.
8. The method of claim 1 , wherein the at least one guide rail includes a tether including radiopaque material.
9. The method of claim 1 , wherein the prosthesis includes a stent.
10. The method of claim 1 , wherein the prosthesis includes a stent-graft.
11. A method of delivering a prosthesis to an anatomical target location, comprising:
introducing a distal end of a delivery catheter containing the prosthesis to a location proximate the anatomical target location within a patient's vasculature;
deploying the prosthesis from the delivery catheter at the anatomical target location into the patient's vasculature, wherein the prosthesis includes at least one guide rail extending from the prosthesis;
advancing an anchor over the at least one guide rail toward the prosthesis; and
anchoring the anchor into tissue at the anatomical target location to hold the prosthesis in place.
12. The method of claim 11 , wherein the at least one guide rail includes a tether including radiopaque material.
13. The method of claim 11 , wherein the prosthesis includes a replacement cardiac valve.
14. The method of claim 11 , wherein the prosthesis includes a stent.
15. The method of claim 11 , wherein the prosthesis includes a stent-graft.