Reentry catheter and method thereof
First Claim
Patent Images
1. A catheter system, comprising:
- a catheter body having a proximal end, a distal end, at least one lumen running along a longitudinal axis from the proximal end through the distal end, and a lateral opening disposed on a periphery of the catheter body and in communication with the at least one lumen; and
a tubular reentry member comprising a distal end, the distal end comprising;
a first sharp edge parallel to the longitudinal axis to permit cutting, wherein the first sharp edge is formed on at least a portion of a bottom distal edge and extending outwardly from a surface of the tubular reentry member, wherein the bottom distal edge is parallel to the longitudinal axis, the bottom distal edge being opposite a top edge of the tubular reentry member;
a second sharp edge to permit cutting, wherein the second sharp edge and the first sharp edge meet at an angle and form a distal tip of the distal end of the tubular reentry member, wherein the angle is less than 90 degrees;
wherein the tubular reentry member is configured to flex from a first position inside the at least one lumen to a second position outside of the at least one lumen and through the lateral opening of the catheter body when an axial eccentric load is placed on the top edge of the tubular reentry member.
7 Assignments
0 Petitions
Accused Products
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.
222 Citations
20 Claims
-
1. A catheter system, comprising:
-
a catheter body having a proximal end, a distal end, at least one lumen running along a longitudinal axis from the proximal end through the distal end, and a lateral opening disposed on a periphery of the catheter body and in communication with the at least one lumen; and a tubular reentry member comprising a distal end, the distal end comprising; a first sharp edge parallel to the longitudinal axis to permit cutting, wherein the first sharp edge is formed on at least a portion of a bottom distal edge and extending outwardly from a surface of the tubular reentry member, wherein the bottom distal edge is parallel to the longitudinal axis, the bottom distal edge being opposite a top edge of the tubular reentry member; a second sharp edge to permit cutting, wherein the second sharp edge and the first sharp edge meet at an angle and form a distal tip of the distal end of the tubular reentry member, wherein the angle is less than 90 degrees; wherein the tubular reentry member is configured to flex from a first position inside the at least one lumen to a second position outside of the at least one lumen and through the lateral opening of the catheter body when an axial eccentric load is placed on the top edge of the tubular reentry member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
-
-
16. A method of crossing an obstruction in a blood vessel, comprising the steps of:
-
advancing a first guide wire into a lumen of the vessel towards the obstruction in the vessel; advancing the first guide wire into a subintimal space of the vessel to a location distal of the obstruction; advancing a catheter having at least one lumen running along a longitudinal axis and comprising a tubular reentry member over the guide wire to a location where a port disposed on a periphery of the catheter is at a location distal of the obstruction, wherein the tubular reentry member comprises a distal end, the distal end comprising a first sharp edge parallel to the longitudinal axis formed on at least a portion of a bottom distal edge and extending outwardly from a surface of the tubular reentry member, wherein the bottom distal edge is parallel to the longitudinal axis, the bottom distal edge being opposite a top edge of the tubular reentry member, and a second sharp edge, wherein the second sharp edge and the first sharp edge meet at an angle and form a distal tip of the distal end of the tubular reentry member, wherein the angle is less than 90 degrees, the tubular reentry member being configured to flex from a first position inside the at least one lumen to a second position outside of the at least one lumen and through the port of the catheter when an axial eccentric load is placed on the top edge of the reentry member; and cutting with at least one of the first sharp edge and the second sharp edge of the tubular reentry member from a first location within the subintimal space of the vessel through the port to a second location within a true lumen of the vessel. - View Dependent Claims (17, 18, 19)
-
-
20. A catheter system, comprising:
-
a catheter body having a proximal end, a distal end, at least one lumen running from the proximal end through the distal end, and a lateral opening disposed on a periphery of the catheter body and in communication with the at least one lumen; and a reentry member comprising a distal end, the distal end comprising; a first sharp edge to permit cutting, wherein the first sharp edge is formed on at least a portion of a bottom distal edge of the reentry member, wherein the distal end of the reentry member comprises a tear drop shaped cross section tapering to form the first sharp edge; a second sharp edge to permit cutting, wherein the second sharp edge is formed on a leading edge of the distal end of the reentry member; wherein the reentry member is configured to flex from a first position inside the at least one lumen to a second position outside of the at least one lumen and through the lateral opening of the catheter body when an axial eccentric load is placed at a portion of the reentry member.
-
Specification