Catheter for removal of an organized embolic thrombus
First Claim
1. A catheter for removal of an embolic thrombus comprising:
- a capture sheath;
a flexible capture sleeve having an expanded conformation and an unexpanded conformation;
a grasping mechanism comprising plurality of flexible fingers and having an expanded conformation and an unexpanded conformation, said grasping mechanism attached to the distal end of a first elongated tube;
an elongated guidewire having a proximal end and a distal end and having an occlusion balloon affixed to said elongated guidewire near said distal end, said elongated guidewire being slideable within said grasping mechanism such that said occlusion balloon is extendable distally beyond said grasping mechanism;
wherein said capture sheath, said flexible capture sleeve, said grasping mechanism and said elongated guidewire form a telescopic system; and
wherein said grasping mechanism, in said unexpanded conformation, defines a passageway to and through said first elongated tube; and
wherein at least one of said plurality of flexible fingers includes a serrated edge, an adjacent shorter smooth edge, an opposed serrated edge, and an adjacent opposed shorter smooth edge, wherein an elongated smooth surface is located between said opposed serrated edges and, and an elongated smooth surface is located between said opposed smooth edges.
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Accused Products
Abstract
The general purpose of the present invention is to provide a catheter for removal of an organized embolic thrombus, preferably in conjunction with a distal occlusion balloon guidewire. The present invention consists of three main components including a capture/delivery sheath, a capture sleeve of mesh attached to a tube and a grasping mechanism attached to another tube which is central to the other components. Operative structures in the form of manifolds are connected to such components in order to manipulate and control the relative positions of the capture/delivery sheath, the capture sleeve and the grasping mechanism. An embolic thrombus is engaged by the deployable automatically expanding serrated fingers of a grasping mechanism in combination with a deployable automatically expanding mesh capture sleeve. The capture/delivery sheath is maneuvered to cause compression of the serrated fingers and of the mesh capture sleeve for subsequent removal of the embolic thrombus.
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Citations
21 Claims
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1. A catheter for removal of an embolic thrombus comprising:
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a capture sheath; a flexible capture sleeve having an expanded conformation and an unexpanded conformation; a grasping mechanism comprising plurality of flexible fingers and having an expanded conformation and an unexpanded conformation, said grasping mechanism attached to the distal end of a first elongated tube; an elongated guidewire having a proximal end and a distal end and having an occlusion balloon affixed to said elongated guidewire near said distal end, said elongated guidewire being slideable within said grasping mechanism such that said occlusion balloon is extendable distally beyond said grasping mechanism; wherein said capture sheath, said flexible capture sleeve, said grasping mechanism and said elongated guidewire form a telescopic system; and wherein said grasping mechanism, in said unexpanded conformation, defines a passageway to and through said first elongated tube; and wherein at least one of said plurality of flexible fingers includes a serrated edge, an adjacent shorter smooth edge, an opposed serrated edge, and an adjacent opposed shorter smooth edge, wherein an elongated smooth surface is located between said opposed serrated edges and, and an elongated smooth surface is located between said opposed smooth edges. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method for removal of an embolic thrombus from within a blood vessel comprising the steps of:
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a.) providing an elongated catheter with a grasping mechanism at its distal end, wherein , said grasping mechanism is attached to the distal end of a first elongated tube, and wherein an elongated guidewire having a proximal end and a distal end and having an occlusion balloon affixed to said elongated guidewire near said distal end, said elongated guidewire being slideable within said first elongated tube such that said occlusion balloon is extendable distally beyond said grasping mechanism, and wherein said grasping mechanism, in said unexpanded conformation, defines a passageway to and through said first elongated tube, and wherein said grasping mechanism comprises a plurality of flexible fingers, wherein at least one of said plurality of flexible fingers includes a serrated edge, an adjacent shorter smooth edge, an opposed serrated edge, and an adjacent opposed shorter smooth edge, wherein an elongated smooth surface is located between said opposed serrated edges and, and an elongated smooth surface is located between said opposed smooth edges; b.) inserting said distal end of said elongated catheter into said blood vessel in proximity to said embolic thrombus; c.) collapsing around at least a portion of said embolic thrombus with said plurality of flexible fingers and reducing said embolic thrombus; and d.) removing said grasping mechanism and at least a portion of said embolic thrombus from said blood vessel. - View Dependent Claims (17, 18, 19, 20, 21)
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Specification