ATHERECTOMY DEVICE

摘要

A surgical apparatus for removing deposits from an interior of a vessel including an outer member and a rotatable shaft having a lumen to receive a guidewire. The lumen has a cross-sectional dimension to enable fluid injection between an inner diameter of the shaft and an outer diameter of the guidewire. A tip is mounted to the shaft for rotation about its longitudinal axis and mounted such that the distal opening of the shaft is axially spaced from a distal internal surface of the tip such that fluid injected through the lumen of the shaft contacts the distal internal surface of the tip and is redirected proximally to direct in a proximal direction deposits removed by the rotational movement of the shaft. The tip includes including a guidewire lumen for receiving a guidewire to enable over the wire insertion of the apparatus.

主权项

1. A surgical system for removing deposits such as plaque from an interior of a vessel comprising:
an atherectomy device having
an outer member;a rotatable tip extending distally from the outer member and having an internal distal surface and a plurality of openings; anda rotatable shaft positioned within the outer member and having a longitudinal axis and a distal opening, the rotatable tip mounted to a distal portion of the rotatable shaft, the rotatable tip being rotatable about its longitudinal axis upon rotation of the rotatable shaft to remove deposits from the interior of the vessel, the rotatable shaft including a series of outer threads dimensioned to direct particles proximally; an introducer, the atherectomy device insertable through the introducer to access a target vessel containing the deposits; a motor for rotating the rotatable shaft and the tip; a suction device for aspirating deposits through the plurality of openings in the rotatable tip and through a gap between the rotatable shaft and the outer member to direct proximally particles dislodged by the rotatable tip; and a fluid injection device for injecting high pressure fluid through the rotatable shaft, the fluid exiting the distal opening in the shaft and contacting the internal distal surface of the rotatable tip where it is directed rearwardly to direct dislodged deposits proximally.