CPC A61B 17/12036 (2013.01) [A61B 17/12109 (2013.01); A61B 17/12168 (2013.01); A61B 17/12172 (2013.01); A61F 2/90 (2013.01); A61B 5/4848 (2013.01); A61B 17/1215 (2013.01); A61B 2017/00526 (2013.01); A61F 2/06 (2013.01); A61F 2002/068 (2013.01)] | 41 Claims |
1. A medical apparatus comprising:
a first tubular wall, sized for deployment within a blood vessel;
a second tubular wall, within the first tubular wall, and
a narrow constricting element, at least partially surrounding a portion of the second tubular wall, holding said portion of said second tubular wall to a fixed open circumference, and configured to fixedly hold said portion of said second tubular wall away from said first tubular wall, to form a diametrical reducer, wherein an end of the second tubular wall is connected to an end of the first tubular wall, and wherein the other end of the second tubular wall is not connected to the other end of the first tubular wall to allow a change in the overall longitudinal length of the second tubular wall.
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