Energy delivery devices and methods
First Claim
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1. A catheter for delivering radio frequency energy to an airway wall of a human lung, the catheter comprising:
- a flexible elongate shaft having a proximal portion and a distal portion adapted for insertion into an airway of a human lung;
an expandable basket comprising a plurality of radio frequency electrode legs coupled to the distal portion of the shaft, each leg having a proximal end, a distal end, and a flexure length;
a proximal alignment component having a plurality of proximal seats extending along an axis of the proximal alignment component, the proximal alignment component secured to the distal portion of the shaft; and
a distal alignment component having a plurality of distal seats extending along an axis of the distal alignment component, wherein the plurality of distal seats are in alignment with the plurality of proximal seats;
wherein the distal end of each leg is nested within a distal seat and the proximal end of each leg is nested within a proximal seat such that an angle between adjacent legs is determined by an angle between adjacent seats and the flexure length is determined by the distance between proximal and distal alignment components.
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Abstract
This relates to methods and devices for achieving contact between the wall of a cavity or passageway and a medical device when used in tortuous anatomy.
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Citations
22 Claims
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1. A catheter for delivering radio frequency energy to an airway wall of a human lung, the catheter comprising:
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a flexible elongate shaft having a proximal portion and a distal portion adapted for insertion into an airway of a human lung; an expandable basket comprising a plurality of radio frequency electrode legs coupled to the distal portion of the shaft, each leg having a proximal end, a distal end, and a flexure length; a proximal alignment component having a plurality of proximal seats extending along an axis of the proximal alignment component, the proximal alignment component secured to the distal portion of the shaft; and a distal alignment component having a plurality of distal seats extending along an axis of the distal alignment component, wherein the plurality of distal seats are in alignment with the plurality of proximal seats; wherein the distal end of each leg is nested within a distal seat and the proximal end of each leg is nested within a proximal seat such that an angle between adjacent legs is determined by an angle between adjacent seats and the flexure length is determined by the distance between proximal and distal alignment components. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A catheter for delivering energy to a body lumen, the catheter comprising:
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a flexible elongate shaft having a proximal portion and a distal portion adapted for insertion into a body lumen; an energy transfer basket coupled to the shaft, the energy transfer basket comprising a plurality of legs adapted to apply energy to the body lumen, each leg having a distal end and a proximal end; a near alignment component having a plurality of near seats extending along an axis of the alignment component, the near alignment component secured to the elongate shaft; and a far alignment component having a plurality of far seats extending along an axis of the alignment component, wherein the plurality of near seats are in alignment with the plurality of far seats; wherein the distal end of each leg is nested within a far seat and the proximal end of each leg is nested within a near seat such that an angle between adjacent legs is determined by an angle between adjacent seats.
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22. A radio frequency energy delivery device, comprising:
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an elongated body having a cover with an inner wall, a coil coupled to the inner wall of the cover, and a lumen in the coil; a wire extending through the lumen; and an energy delivery unit at a distal portion of the elongated body, the energy delivery unit having a proximal alignment component fixed to the elongated body, a distal alignment component attached to the wire, and a plurality of flexible electrodes having proximal ends attached to the proximal alignment component and distal ends attached to the distal alignment component.
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Specification