| CPC A61B 18/245 (2013.01) [A61F 2/95 (2013.01); A61M 25/104 (2013.01); A61B 2017/22068 (2013.01); A61B 2017/22079 (2013.01); A61B 2018/0041 (2013.01); A61B 2018/2261 (2013.01); A61F 2002/9528 (2013.01); A61M 2205/053 (2013.01)] | 21 Claims |

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1. A dilation system for dilating a tubular anatomical structure using UV laser light, said dilation system comprising an optical fiber and a thrombectomy balloon catheter, the optical fiber having a distal end configuration selected from the group consisting of an external cone an inverted cone, and a flat distal end comprising concentric circular grooves etched into the flat distal end, wherein the laser light is refractively emitted from the distal end of the optical fiber as a conical ring beams at an emission angle β greater than 15° and up to about 140°; wherein the optical fiber comprises a material selected from the group consisting of ALON, sapphire, and a customized polymeric material.
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