Implantable intraluminal device
This document provides implantable intraluminal stent graft medical devices. In some embodiments, the stent graft devices provided herein are implantable in bodily conduits that have side branches, and the stent graft devices are operable to allow the flow of fluids between the conduit and the side branches. In some embodiments, the walls of the stent graft devices provided herein include compliant channels which allow for fluid communication between the interior and the exterior of the stent graft devices. In some embodiments, the compliant channels are configured to inhibit or reduce tissue ingrowth, tissue bridging, and/or endothelialization.
1. A method of fabricating an intraluminal stent graft, the method comprising:
arranging a layer of membranous material on a mandrel to form a lumen;
arranging annular support members over the layer;
cutting the layer between the annular support members to produce segments; and
arranging the segments in a nested configuration such that the segments overlap to create compliant channels located between the segments.
2. The method of claim 1 , wherein the compliant channels are configured to permit fluid flow between an exterior of the intraluminal stent graft and an interior of the lumen.
3. The method of claim 1 , further comprising arranging reinforcing members over the annular support members and adhering the reinforcing members to the layer of membranous material.
4. The method of claim 1 , wherein the membranous material is ePTFE.
5. The method of claim 1 , wherein the annular support members are stent rings.
6. The method of claim 1 , wherein each of the annular support members comprises a continuous, helically wound wire.
7. The method of claim 1 , wherein the segments comprise discrete, cylindrical segments.
8. The method of claim 1 , further comprising placing strips of membranous material over the annular support members and adhering the strips to the layer of membranous material.
9. The method of claim 8 , wherein adhering the strips to the layer of membranous material comprises heating the strips to facilitate bonding of the strips to the layer of membranous material.
10. The method of claim 1 , further comprising cutting the layer of membranous material in locations near the annular support members such that the annular support members are located axially asymmetrical on the segments.
11. The method of claim 1 , wherein the nested configuration is formed by overlapping an unsupported edge portion of at least one segment with a supported edge portion of an adjacent segment.