Atherectomy apparatus, systems and methods
First Claim
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1. A method for performing an atherectomy comprising:
- introducing an atherectomy device into a blood vessel, wherein the atherectomy device comprises a handle, a catheter, and a cutter assembly, wherein the cutter assembly comprises a cutter housing and a cutter configured to rotate within the housing, wherein the cutter comprises at least one helical flute forming a cutting blade having a positive rake angle, wherein the positive rake angle is between 60 degrees and 80 degrees, and wherein the cutter comprises a first cutting element and a second cutting element, wherein the first cutting element has at least a first portion having an outside diameter greater than or equal to an outside diameter of the cutter housing;
advancing the cutter assembly to a targeted region having occlusive material; and
rotating the cutter to cut the occlusive material.
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Abstract
Described here are devices and methods for performing atherectomies. Generally, the atherectomy devices include a handle, a cutter assembly, and a catheter or catheter assembly therebetween. The cutter assembly includes a cutter housing and a cutter having a first cutting element and a second cutting element, each of which can be rotated relative to the atherectomy device to cut occlusive material.
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Citations
10 Claims
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1. A method for performing an atherectomy comprising:
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introducing an atherectomy device into a blood vessel, wherein the atherectomy device comprises a handle, a catheter, and a cutter assembly, wherein the cutter assembly comprises a cutter housing and a cutter configured to rotate within the housing, wherein the cutter comprises at least one helical flute forming a cutting blade having a positive rake angle, wherein the positive rake angle is between 60 degrees and 80 degrees, and wherein the cutter comprises a first cutting element and a second cutting element, wherein the first cutting element has at least a first portion having an outside diameter greater than or equal to an outside diameter of the cutter housing; advancing the cutter assembly to a targeted region having occlusive material; and rotating the cutter to cut the occlusive material. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification