Patent ID: 9700347
Date: 2017-07-11
CPC Classifications: A61B,A61M

Claim:
1. A rotary catheter for opening an obstruction in a bodily vessel, comprising in combination; a motor-driven flexible hollow shaft rotatably disposed in a flexible tube, an aspiration channel defined between an internal diameter of said flexible tube and an external diameter of said hollow shaft, at least a distal portion of said hollow shaft being free to move radially in said aspiration channel enabling said aspiration channel to ingest particles which are as large as, or smaller, than a difference between said internal and external diameters, relative motion between said rotating hollow shaft and said flexible tube eases movement of the particles through said aspiration channel and impedes the particles from clogging said aspiration channel, a tip having a narrowed cross section and affixed to a terminal distal end of said hollow shaft, said tip having a rounded terminal distal end which defines a bore adapted to fit over a guidewire, said hollow shaft and said tip being rotatable and slideable over said guidewire, said tip also having a first flattened side and a second flattened side opposite said first flattened side, said first flattened side adapted to impact said obstruction when said tip rotates in a first direction, said first flattened side and said second flattened side being a cross sectional distance apart to define a width of said tip transverse to a longitudinal axis of said tip, said tip also having a base and an opposing crown that is adapted to atraumatically slide against a wall of said vessel as said tip rotates outside of said flexible tube, said base and said opposing crown defining the height of said tip by a cross sectional distance transverse to a longitudinal axis of said tip, said crown being offset away from a longitudinal axis of said hollow shaft further than said base is offset away from said longitudinal axis, said cross sectional distance between said flattened sides being smaller than said cross sectional distance between said crown and said base and wherein a widest portion of said width is defined by said flattened sides.