Delivery devices with coolable energy emitting assemblies
First Claim
Patent Images
1. A catheter system, comprising:
- an elongate body having a coolant delivery lumen and a coolant return lumen; and
an ablation assembly coupled to a distal end of the elongate body and being positionable through a working channel into in an airway of a patient, the ablation assembly being movable from a collapsed configuration having a collapsed cross-section to an expanded configuration having an expanded cross-section, the collapsed cross-section having a collapsed transverse dimension not more than about 6 mm and the expanded cross-section having an expanded transverse dimension of at least about 7 mm so as to contact an airway wall of the patient, the ablation assembly including —
an energy emitter assembly having a tissue-contacting portion, the energy emitter assembly being configured to deliver energy through surface tissue of the airway wall to target tissue spaced radially outward from the surface tissue at a power sufficient to ablate said target tissue,a coolant directing element adapted to actively direct a portion of coolant from the coolant delivery lumen toward the energy emitter assembly to cool the tissue-contacting portion of the energy emitter assembly and to cool a first surface tissue in contact with the tissue-contacting portion of the energy emitter assembly so as to inhibit permanent damage to the first surface tissue while the energy emitter assembly delivers energy to the target tissue; and
a cooling member configured to cool a second surface tissue adjacent to the tissue-contacting portion of the energy emitter assembly so as to inhibit permanent damage to the second surface tissue while the energy emitter assembly delivers energy to the target tissue;
wherein the coolant directing element comprises a fluid delivery conduit fluidly coupled to the coolant delivery lumen and which at least partially wraps around the cooling member in the expanded configuration.
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Abstract
Systems, delivery devices, and methods to treat, ablate, damage, or otherwise affect tissue in an airway of a patient. The treatment systems are capable of delivering a coolable ablation assembly that ablates targeted tissue while cooling non-targeted tissue to protect the non-target tissue from damage. The coolable ablation assembly damages nerve tissue to temporarily or permanently decrease nervous system input.
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Citations
27 Claims
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1. A catheter system, comprising:
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an elongate body having a coolant delivery lumen and a coolant return lumen; and an ablation assembly coupled to a distal end of the elongate body and being positionable through a working channel into in an airway of a patient, the ablation assembly being movable from a collapsed configuration having a collapsed cross-section to an expanded configuration having an expanded cross-section, the collapsed cross-section having a collapsed transverse dimension not more than about 6 mm and the expanded cross-section having an expanded transverse dimension of at least about 7 mm so as to contact an airway wall of the patient, the ablation assembly including — an energy emitter assembly having a tissue-contacting portion, the energy emitter assembly being configured to deliver energy through surface tissue of the airway wall to target tissue spaced radially outward from the surface tissue at a power sufficient to ablate said target tissue, a coolant directing element adapted to actively direct a portion of coolant from the coolant delivery lumen toward the energy emitter assembly to cool the tissue-contacting portion of the energy emitter assembly and to cool a first surface tissue in contact with the tissue-contacting portion of the energy emitter assembly so as to inhibit permanent damage to the first surface tissue while the energy emitter assembly delivers energy to the target tissue; and a cooling member configured to cool a second surface tissue adjacent to the tissue-contacting portion of the energy emitter assembly so as to inhibit permanent damage to the second surface tissue while the energy emitter assembly delivers energy to the target tissue;
wherein the coolant directing element comprises a fluid delivery conduit fluidly coupled to the coolant delivery lumen and which at least partially wraps around the cooling member in the expanded configuration. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 19)
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18. The catheter system of claim h wherein the cooling member is configured to contact a surface of the airway wall immediately adjacent to the energy emitter assembly to minimize permanent damage to the surface tissue.
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20. A catheter system, comprising:
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an elongate body having a coolant delivery lumen therein; and an ablation assembly coupled to a distal end of the elongate body and being positionable through a working channel into in an airway of a patient, the ablation assembly being movable from a collapsed configuration having a collapsed cross-section to an expanded configuration having an expanded cross-section, the collapsed cross-section having a collapsed transverse dimension not more than about 6 mm and the expanded cross-section having an expanded transverse dimension of at least about 7 mm so as to contact an airway wall of the patient, the ablation assembly including; a fluid delivery conduit having a coolant channel fluidly connected to the coolant delivery lumen; an electrode coupled to the fluid delivery conduit and configured to deliver energy through surface tissue of the airway wall to target tissue spaced radially outward from the surface tissue, at least a portion of the electrode having a tissue-contacting portion, wherein the fluid delivery conduit is adapted to actively direct a portion of coolant from the coolant delivery lumen toward the electrode to cool the tissue-contacting portion of the electrode and a first surface tissue in contact with the tissue-contacting portion of the electrode so as to inhibit permanent damage to the first surface tissue while the electrode delivers energy to the target tissue; and a cooling member configured to contact and cool a second surface tissue adjacent the tissue-contacting portion of the electrode so as to inhibit permanent damage to the second surface tissue while the electrode delivers energy to the target tissue;
wherein the fluid delivery conduit at least partially wraps around the cooling member in the expanded configuration. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27)
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Specification