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US 2013/0296901 A1Published application
Debulking catheter
AssigneeCovidien LP
InventorWilliam John Olson
Life of this patent
Estimating the term…
Abstract
A catheter includes a rotatable cutter in a catheter body adjacent a window and operatively connected to a rotatable shaft for rotation therewith. The rotatable cutter includes a proximally-facing cutting edge. The rotatable cutter is selectively positionable to a cutting position in which the rotatable cutter extends partially outside the window to expose the cutting edge such that the catheter can be moved proximally within the body lumen as the rotatable cutter is rotating to remove tissue from the lumen and direct the removed tissue through the window and into a removed-tissue lumen.
Claims18
A catheter for removing tissue from a body lumen of a subject, the catheter comprising:
- an elongate catheter body having proximal and distal ends and a longitudinal axis extending therebetween, the catheter body being sized and shaped for introduction into the body lumen of the subject;
- a window adjacent the distal end of the catheter body and extending generally transversely into the catheter body relative to the longitudinal axis of the catheter body for receiving removed tissue from the body lumen;
- a removed-tissue lumen in the catheter body and in communication with the window for receiving removed tissue passing through the window;
- a rotatable shaft having proximal and distal ends and a longitudinal axis extending therebetween, the shaft extending longitudinally within the catheter body and configured for selective rotation about its longitudinal axis relative to the catheter body;
- a rotatable cutter in the catheter body adjacent the window and operatively connected to the rotatable shaft for rotation therewith, the rotatable cutter including a proximally-facing cutting edge, wherein the rotatable cutter is selectively positionable to a cutting position in which the rotatable cutter extends partially outside the window to expose the cutting edge such that the catheter can be moved proximally within the body lumen as the rotatable cutter is rotating to remove tissue from the lumen and direct the removed tissue through the window and into the removed-tissue lumen.
2 more elements
A catheter for removing tissue from a body lumen of a subject, the catheter comprising:
- an elongate catheter body having proximal and distal ends and a longitudinal axis extending therebetween, the catheter body being sized and shaped for introduction into the body lumen of the subject;
- a window adjacent the distal end of the catheter body and extending generally transversely into the catheter body relative to the longitudinal axis of the catheter body for receiving removed tissue from the body lumen;
- a removed-tissue lumen in the catheter body and in communication with the window for receiving removed tissue passing through the window;
- a stationary cutting element for removing tissue from the body lumen, the stationary cutting element located adjacent to the window and configured to direct tissue cut from the body lumen toward the window;
- a plunger assembly in the elongate catheter body, the plunger assembly including
- a shaft having proximal and distal ends and a longitudinal axis extending therebetween, the shaft extending longitudinally through the elongate catheter body and configured for rotation about its longitudinal axis and longitudinal movement relative to the catheter body;
- a plunger secured adjacent the distal end of the shaft within the removed-tissue lumen, the plunger configured to rotate with the shaft and move longitudinally with the shaft within the removed-tissue lumen, wherein the plunger is longitudinally moveable within the removed-tissue lumen between a first longitudinal position, in which the plunger is in registration with the window and spaced a first longitudinal distance from the stationary cutting element to define a first effective open area of the window leading to the removed-tissue lumen, and a second longitudinal position, in which the plunger is in registration with the window and spaced a second longitudinal distance from the stationary cutting element to define a second effective open area of the window leading to the removed-tissue lumen, wherein the first longitudinal distal is greater than the second longitudinal distance and the first effective open area of the window is greater than the second effective open area of the window.
4 more elements
Dependencies are inferred from the claim text.