Catheter with needles for ablating tissue layers in vessel
First Claim
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1. A catheter comprising:
- a catheter body;
a distal tip section having;
a tubing with a lumen, the tubing having at least one opening;
at least one needle in the lumen configured to assume a deployed position and a retracted position;
an elongated support member extending through at least the lumen of the distal tip section;
an actuator extending through at least the lumen of the distal tip section and configured for longitudinal movement on and relative to the elongated support member,a control handle having a member adapted to control longitudinal movement of the actuator relative to the elongated support member; and
a wire adapted for longitudinal movement relative to at least the catheter body for moving the actuator relative to the elongated support member;
wherein the at least one needle is supported by the elongated support member while in the retracted position and the at least one needle is pushed outwardly in a radial direction by the actuator while in the deployed position.
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Abstract
A catheter has a catheter body and a distal tip section with needles that are positioned radially to extend outside of the distal tip section to pierce and penetrate tissue layers of a vessel or tubular region. The needles are supported in a retracted position inside the distal tip section on an elongated support member. For deployment, the needles are lifted and a portion thereof pushed through openings in the distal tip section by an actuator that is longitudinally slidable on the elongated support member. The actuator has a tapered end to help lift the needle onto the actuator. In another embodiment, an inflatable balloon member with needles is movable between retracted and deployed positions.
19 Citations
13 Claims
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1. A catheter comprising:
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a catheter body; a distal tip section having; a tubing with a lumen, the tubing having at least one opening; at least one needle in the lumen configured to assume a deployed position and a retracted position; an elongated support member extending through at least the lumen of the distal tip section; an actuator extending through at least the lumen of the distal tip section and configured for longitudinal movement on and relative to the elongated support member, a control handle having a member adapted to control longitudinal movement of the actuator relative to the elongated support member; and a wire adapted for longitudinal movement relative to at least the catheter body for moving the actuator relative to the elongated support member; wherein the at least one needle is supported by the elongated support member while in the retracted position and the at least one needle is pushed outwardly in a radial direction by the actuator while in the deployed position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification