06258052 is referenced by 147 patents and cites 18 patents.

A guidewire or a catheter for crossing vascular occlusions comprises a shaft having a proximal end and a distal end, and a drive member having a proximal and a distal end, the drive member being rotatably disposed within and along a longitudinal axis of the guidewire shaft. An actuator is connected to the proximal end of the drive member, the actuator imparting a rotation to the drive member. An asymmetrical rotating tip is attached to the distal end of the drive member and driven in rotation about the longitudinal axis of the shaft by the drive member. The rotating tip may include a protruding portion that projects from a plane defined by an outer surface of the guidewire shaft to render the rotating tip asymmetrical with respect to the longitudinal axis of the shaft. The protruding portion creates a volume of revolution as the asymmetrical tip rotates, which facilitates crossing a vascular occlusion by displacing and exerting pressure on stenotic material causing the occlusion. Alternatively, the rotating tip may be symmetrical. A coupling member may be attached to the distal end of the shaft and may include a distal angled surface. When the tip includes a mating angled surface, rotation of the drive member causes the tip to undergo both a reciprocal and a rotational motion along and about the longitudinal axis of the shaft.

Title
Guidewire and catheter with rotating and reciprocating symmetrical or asymmetrical distal tip
Application Number
9/443682
Publication Number
6258052 (B1)
Application Date
November 18, 1999
Publication Date
July 10, 2001
Inventor
Charles F Milo
Union City
CA, US
Agent
Wilson Sonsini Goodrich & Rosati
US
Assignee
LuMend
CA, US
IPC
A61B 17/20
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