Reentry catheter and method thereof
First Claim
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1. A method of crossing an obstruction in a blood vessel, the method comprising the steps of:
- advancing a first guide wire into a lumen of the vessel towards the obstruction in the blood vessel;
advancing the first guide wire into a subintimal space of the vessel to a location distal of the obstruction;
advancing a catheter comprising a reentry member over the guide wire to a location where a lateral port of the catheter is at a location distal of the obstruction, wherein the reentry member comprises a plurality of segments, wherein at least two of the plurality of segments comprise a tear drop shape, and wherein at least one of the tear drop shaped segments comprises a sharp edge; and
deploying the tear drop shaped segments through the lateral port from a first location within the subintimal space of the vessel to a second location with the lumen of the vessel that is distal of the obstruction and upon application of a substantially eccentric force to a distal portion of the reentry member.
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Abstract
The invention generally relates to method and apparatus for crossing an obstruction in a tubular member, and more particularly to a medical device method for crossing of a chronic occlusion in a subintimal or interstitial space of an artery.
223 Citations
16 Claims
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1. A method of crossing an obstruction in a blood vessel, the method comprising the steps of:
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advancing a first guide wire into a lumen of the vessel towards the obstruction in the blood vessel; advancing the first guide wire into a subintimal space of the vessel to a location distal of the obstruction; advancing a catheter comprising a reentry member over the guide wire to a location where a lateral port of the catheter is at a location distal of the obstruction, wherein the reentry member comprises a plurality of segments, wherein at least two of the plurality of segments comprise a tear drop shape, and wherein at least one of the tear drop shaped segments comprises a sharp edge; and deploying the tear drop shaped segments through the lateral port from a first location within the subintimal space of the vessel to a second location with the lumen of the vessel that is distal of the obstruction and upon application of a substantially eccentric force to a distal portion of the reentry member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification