Catheter and method for making intravascular incisions
First Claim
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1. A catheter apparatus for forming incisions in the atheroma of a stenosed blood vessel, said catheter apparatus comprising:
- an elongate catheter body having a proximate and a distal end;
a piston mounted to axially reciprocate within the distal end of the catheter body;
at least one blade pivotally mounted on the piston;
a cam member mounted to engage the blade as it is reciprocated by the piston and to shift the blade between a position projecting from the distal end; and
means for reciprocating the piston.
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Abstract
A vascular catheter includes a blade tip at its distal end. In the specific embodiments, a blade is mounted within the blade tip and a mechanism provided for extending the blade transversely when the blade tip is located within a region of stenosis. By extending the blade and axially translating the catheter so that the blade forms an incision within the region of stenosis, improved angioplastic treatment can be achieved.
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Citations
10 Claims
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1. A catheter apparatus for forming incisions in the atheroma of a stenosed blood vessel, said catheter apparatus comprising:
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an elongate catheter body having a proximate and a distal end; a piston mounted to axially reciprocate within the distal end of the catheter body; at least one blade pivotally mounted on the piston; a cam member mounted to engage the blade as it is reciprocated by the piston and to shift the blade between a position projecting from the distal end; and means for reciprocating the piston. - View Dependent Claims (2, 3, 4, 5)
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6. A catheter apparatus for forming incisions in the atheroma of a stenosed blood vessel, said catheter apparatus comprising:
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an elongate catheter body having a proximate and a distal end; a housing secured to the distal end of the elongate catheter body; a blade rigidly mounted to the housing, said blade being oriented radially so that it is able to form an axial incision when the catheter and housing are axially translated within a blood vessel; and a balloon positioned on the exterior of the housing at a location such that inflation of the balloon will urge the housing away from a vessel wall and move the rigid blade in a cutting direction.
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7. A method for enlarging an atheroma within a blood vessel, said method employing a catheter having a balde at a distal end thereof, said method comprising:
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positioning the catheter within the blood vessel so that the distal end lies substantially within the atheroma; inflating a balloon mounted on a side of the distal end of the catheter opposite the blade so as to urge the blade into the atheroma; axially translating the catheter blade to form an axial incision within the atheroma; and inflating a dilation balloon within the atheroma to expand the passage through the atheroma. - View Dependent Claims (8, 9, 10)
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Specification