Easily cleaned atherectomy catheters and methods of use
AssigneeCovidien LP
InventorJohn Robert Moberg
Life of this patent
Estimating the term…
Abstract
An atherectomy catheter is provided having a tissue collection chamber capable of being cleaned out in a simple, fast and effective way, and also provides methods of using said catheter to remove material from a blood vessel lumen. In one embodiment the tissue collection chamber has an expandable tip having a first closed position capable of retaining material in the chamber and having a second open position that may allow expulsion of material from the chamber. In a second embodiment the tissue collection chamber has a displaceable tip having a first closed position to retain material in the chamber and having a second open position to allow expulsion of material from the chamber.
Claims16
An atherectomy catheter comprising:
- a body having an opening;
- a rotatable shaft coupled to the body, the rotatable shaft being rotatable about a longitudinal axis of the shaft;
- a cutting element coupled to the rotatable shaft, the cutting element having a cup-shaped surface and a cutting edge, the cup-shaped surface being configured to re-direct tissue cut by the cutting edge in a distal direction when the cup-shaped surface moves in the distal direction;
- a tissue collection chamber coupled to the body and positioned distal to the cutting element, the tissue collection chamber comprises a sheath defining a lumen for receiving cut tissue from the cutting element, and a displaceable tip at a distal region of the sheath, the displaceable tip being displaceable relative to the sheath between a first closed position capable of retaining cut tissue in the sheath and a second open position capable of allowing expulsion of cut tissue from the sheath, the displaceable tip being attached to the sheath in both the first closed and second open positions;
- and
- an actuator axially movable relative to the sheath to impart displacement of the tip between the first closed position and the second open position.
A method of removing tissue from a body lumen, the method comprising:
- providing an atherectomy catheter, the atherectomy catheter comprising:
- a body having an opening;
- a rotatable shaft coupled to the body, the rotatable shaft being rotatable about a longitudinal axis of the shaft;
- a cutting element coupled to the rotatable shaft, the cutting element having a cup-shaped surface and a cutting edge, the cup-shaped surface being configured to re-direct tissue cut by the cutting edge in a distal direction when the cup-shaped surface moves in the distal direction;
- a tissue collection chamber coupled to the body and positioned distal to the cutting element, the tissue collection chamber comprises a sheath defining a lumen for receiving cut tissue from the cutting element, and a displaceable tip at a distal region of the sheath, the displaceable tip being displaceable relative to the sheath between a first closed position capable of retaining cut tissue in the sheath and a second open position capable of allowing expulsion of cut tissue from the sheath, the displaceable tip being attached to the sheath in both the first closed and second open positions;
- and
- an actuator axially movable relative to the sheath to impart displacement of the tip between the first closed position and the second open position;
- placing the catheter in the body lumen;
- and
- moving the catheter in the body lumen to contact the cutting element with the material in the body lumen.
Dependencies are inferred from the claim text.