Dual-tip Catheter System for Boring through Blocked Vascular Passages
First Claim
1. A catheter comprisinga catheter tube with a proximal end, and a hollow distal end configured to enter a body lumen;
- a cavity for a guidewire configured so that a guidewire with a proximal end and a distal tip inserted into the cavity is positionable within the hollow distal end of the catheter tube, and application of force on the proximal end of the guidewire causes the guidewire tip to extend forward at least partially outside of the distal end of the catheter tube; and
a distal rotatable cutting bit positionable within the hollow distal end of the catheter tube and configured to allow force applied to the rotatable cutting bit to cause the cutting bit to extend forward at least partially outside of the distal end of the catheter tube.
1 Assignment
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Accused Products
Abstract
A dual-tip catheter equipped with both a rotating cutting bit and a cavity for a probing guidewire tip for passage through chronic total occlusions or other refractory atherosclerotic plaque from diseased arteries. The catheter'"'"'s guidewire tip and rotating cutting bit reside safely within an outer protective catheter sheath head when not in use, and alternately either the cutting bit or the guidewire tip will protrude out of the same distal opening of the sheath head as needed. By first drilling through refractory occlusions, and then inserting a guidewire tip into the occlusion opening formed by the cutting bit, the catheter can force the guidewire tip past the occlusion. After the guidewire tip has been fully inserted, the dual-tip catheter can be withdrawn, and an alternate catheter inserted and directed up the guidewire to the occlusion site, where the alternate catheter can perform further occlusion enlargement or therapeutic activity.
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Citations
58 Claims
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1. A catheter comprising
a catheter tube with a proximal end, and a hollow distal end configured to enter a body lumen; -
a cavity for a guidewire configured so that a guidewire with a proximal end and a distal tip inserted into the cavity is positionable within the hollow distal end of the catheter tube, and application of force on the proximal end of the guidewire causes the guidewire tip to extend forward at least partially outside of the distal end of the catheter tube; and a distal rotatable cutting bit positionable within the hollow distal end of the catheter tube and configured to allow force applied to the rotatable cutting bit to cause the cutting bit to extend forward at least partially outside of the distal end of the catheter tube. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A catheter comprising a catheter tube with a proximal end, and a hollow distal end configured to enter a body lumen, a distal rotatable cutting bit, and a cavity for a guidewire with a proximal end and a distal tip;
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said rotatable cutting bit and said cavity being configured so that a guidewire tip inserted into the cavity is capable of being positioned within the hollow distal end of the catheter tube; said cavity and catheter tube being configured to allow application of distally and proximally directed reversible linear force on the proximal end of a guidewire inserted into the cavity to reversibly cause said guidewire tip to extend forward at least partially outside of the distal end of said catheter tube and to retract inside of the distal end of said catheter tube; and said cutting bit and tube being configured to allow reversible torque force (torque) and optionally linear force reversibly applied to said rotatable cutting bit to cause the cutting bit to reversibly rotate and extend forward at least partially outside of the distal end of the catheter tube and to rotate and retract inside the distal end of the catheter tube. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A catheter comprising:
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a catheter tube with a proximal end, and a distal end configured to enter a body lumen; a hollow sheath head with a distal opening affixed at the distal end of said catheter tube; a cavity for a guidewire with a proximal end and a distal tip, said cavity being configured so that a guidewire tip inserted into the cavity is capable of being positioned at least partially inside said hollow sheath head; a rotatable cutting bit capable of being positioned at least partially inside said hollow sheath head; said cavity, catheter tube, and hollow sheath head being configured to allow application of distally and proximally directed reversible linear force on the proximal end of a guidewire inserted into the cavity to reversibly cause said guidewire tip to extend forward at least partially outside of the distal opening of said hollow sheath head and to retract inside of the distal opening of said hollow sheath head; said cutting bit, catheter tube, and hollow sheath head being configured to allow reversible torque force (torque) and optionally linear force reversibly applied to said rotatable cutting bit to cause the cutting bit to reversibly rotate and extend forward at least partially outside of the distal opening of said hollow sheath head and to rotate and retract inside the distal opening of said hollow sheath head. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43)
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44. A catheter comprising:
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a hollow catheter tube with a proximal end, and a distal end configured to enter a body lumen; a hollow sheath head with a distal opening affixed at the distal end of said catheter tube; a cavity for a guidewire with a proximal end and a distal tip, said cavity being configured so that the distal tip of a guidewire inserted into the cavity can be positioned at least partially inside said hollow sheath head; a rotatable cutting bit with at least one blade edge that is capable of being positioned at least partially inside said hollow sheath head; and a torque communicating connector, wherein application of torque to said torque communicating connector causes said rotatable cutting bit to rotate; said guidewire cavity, catheter tube, and hollow sheath head being configured to allow application of distally and proximally directed reversible linear force on the proximal end of a guidewire inserted into the cavity to reversibly cause said guidewire tip to extend forward at least partially outside of the distal opening of said hollow sheath head and to retract inside of the distal opening of said hollow sheath head; said cutting bit, catheter tube, and hollow sheath head being configured to allow reversible torque force (torque) and optionally linear force reversibly applied to said rotatable cutting bit to cause the cutting bit to reversibly rotate and extend forward at least partially outside of the distal opening of said hollow sheath head and to rotate and retract inside the distal opening of said hollow sheath head; in which a guidewire tip inserted into the cavity and the cutting bit exit the distal opening of the hollow sheath head in the same location, and in which only one of the guidewire tip and the cutting bit may extend partially outside of the distal opening of the hollow sheath head at the same time. - View Dependent Claims (45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58)
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Specification