Systems and methods for treating tissue with radiofrequency energy
First Claim
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1. A device for applying radiofrequency energy for sphincter treatment comprising:
- a flexible outer tube;
an expandable basket having at least a first arm and a second arm, the first and second arms movable from a collapsed position to an expanded position, the first arm having a first opening and the second arm having a second opening;
first and second electrodes, the first electrode movable with respect to the first arm and the second electrode movable with respect to the second arm, the first and second electrodes movable from a retracted position to an extended position such that the first electrode is extendable through a first opening in the first arm and the second electrode is extendable through a second opening in the second arm, each of the first and second electrodes having a first engagement structure;
an electrode holder having a second engagement structure to cooperate with the first engagement structure of the first and second electrodes to maintain the first and second electrodes in a desired radial spaced position; and
an elongated advancer slidably disposed in a center position within the flexible outer tube, the first and second electrodes operably coupled to the advancer such that movement of the advancer advances the first and second electrodes to the extended position; and
a spacer having a central lumen to slidably receive the advancer within the central lumen of the spacer and maintain centering of the advancer during flexing of the outer tube.
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Abstract
A system for controlling operation of a radiofrequency treatment device to apply radiofrequency energy to tissue to treat tissue to create lesions without ablating the tissue. The system includes a first treatment device having a plurality of electrodes. The electrodes are maintained in axial alignment and fixed radial spacing in retracted and extended positions. The device includes a basket having a plurality of arms. The arms are maintained in a fixed radial spacing in the collapsed position of the basket.
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Citations
20 Claims
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1. A device for applying radiofrequency energy for sphincter treatment comprising:
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a flexible outer tube; an expandable basket having at least a first arm and a second arm, the first and second arms movable from a collapsed position to an expanded position, the first arm having a first opening and the second arm having a second opening; first and second electrodes, the first electrode movable with respect to the first arm and the second electrode movable with respect to the second arm, the first and second electrodes movable from a retracted position to an extended position such that the first electrode is extendable through a first opening in the first arm and the second electrode is extendable through a second opening in the second arm, each of the first and second electrodes having a first engagement structure; an electrode holder having a second engagement structure to cooperate with the first engagement structure of the first and second electrodes to maintain the first and second electrodes in a desired radial spaced position; and an elongated advancer slidably disposed in a center position within the flexible outer tube, the first and second electrodes operably coupled to the advancer such that movement of the advancer advances the first and second electrodes to the extended position; and a spacer having a central lumen to slidably receive the advancer within the central lumen of the spacer and maintain centering of the advancer during flexing of the outer tube. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A device for applying radiofrequency energy for sphincter treatment comprising:
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a flexible outer tube; an expandable basket having a plurality of arms movable from a collapsed position to an expanded position, each of the arms of the plurality of arms having an opening and a location feature; a basket holder having a plurality of arm receiving structures to receive the plurality of arms wherein engagement of the location feature of the plurality of arms and the arm receiving structures of the basket holder maintains a desired radial spacing of the plurality of arms in the collapsed position and in the expanded position, the basket holder positioned proximal of an expandable portion of the expandable basket, the basket holder including a plurality of longitudinal grooves formed in and along an outer side wall of the basket holder creating a reduced transverse dimension of the basket holder, and each arm receiving structure is positioned within one of the plurality of longitudinal grooves and extends along a longitudinal length of the respective longitudinal groove; a plurality of electrodes movable with respect to the arms, the plurality of electrodes movable from a retracted position to an extended position so that each electrode of the plurality of electrodes extends through one of the openings in the arms of the plurality of arms, the electrodes positioned external of the outer side wall of the basket holder; and an advancer slidably disposed within the outer tube, the plurality of electrodes operably coupled to the advancer such that movement of the advancer advances the plurality of electrodes to the extended position. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification