CPC A61B 17/22012 (2013.01) [A61B 17/2202 (2013.01); A61B 90/39 (2016.02); A61B 2017/00477 (2013.01); A61B 2017/22015 (2013.01); A61B 2017/22027 (2013.01); A61B 2017/22049 (2013.01); A61B 2017/22094 (2013.01); A61B 2090/0808 (2016.02); A61B 2090/3966 (2016.02)] | 34 Claims |
1. An elongate endovascular element for crossing through an obstruction in a blood vessel, the element comprising:
a proximal section;
a distal tip section of smaller diameter than the proximal section; and
a distally-tapering intermediate section extending between the proximal and distal tip sections;
wherein the tapered intermediate section has a length that is substantially λ/2 or a multiple or an even-denominator fraction of λ/2 in the sequence λ/4, λ/8 . . . , where λ is a wavelength of a driving frequency that will produce longitudinal resonance in the element, and wherein the proximal section of the element is marked with a series of longitudinally-spaced location markers, spaced apart from each other by a distance of substantially λ/2, to guide the user in coupling an activation unit for optimal activation of the distal tip section.
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