Ultrasound ablation catheter with cooling infusion and centering basket
First Claim
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1. An intravascular nerve modulation system, comprising:
- an elongate shaft having a proximal end, a distal end, and an infusion lumen extending therebetween;
an ablation transducer comprising an ultrasound transducer affixed to the elongate shaft adjacent the distal end thereof;
an expandable basket having a proximal end and a distal end, the proximal end affixed to the elongate shaft proximal of a proximal end of the ablation transducer and the distal end is affixed to the elongate shaft distal of a distal end of the ablation transducer;
an infusion sheath secured adjacent to the distal end of the elongate shaft in fluid communication with the infusion lumen, wherein the infusion sheath extends over the ablation transducer and is located within the expandable basket;
wherein the system is configured to transport infusion fluid through the infusion lumen and past the ablation transducer thereby providing convective cooling to the ablation transducer; and
wherein the expandable basket is configured to actuate between a first collapsed configuration and a second expanded configuration.
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Abstract
Systems for nerve and tissue modulation are disclosed. An illustrative system may include an intravascular nerve modulation system including a catheter shaft, a first flexible mount, and a cylindrical ablation transducer. The ablation transducer may be affixed to the catheter shaft through the flexible mount to allow an infusion fluid to pass through a lumen of the transducer. Another illustrative system may include an intravascular nerve modulation system including an expandable basket for centering an ablation tra7nsducer within a lumen.
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Citations
19 Claims
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1. An intravascular nerve modulation system, comprising:
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an elongate shaft having a proximal end, a distal end, and an infusion lumen extending therebetween; an ablation transducer comprising an ultrasound transducer affixed to the elongate shaft adjacent the distal end thereof; an expandable basket having a proximal end and a distal end, the proximal end affixed to the elongate shaft proximal of a proximal end of the ablation transducer and the distal end is affixed to the elongate shaft distal of a distal end of the ablation transducer; an infusion sheath secured adjacent to the distal end of the elongate shaft in fluid communication with the infusion lumen, wherein the infusion sheath extends over the ablation transducer and is located within the expandable basket; wherein the system is configured to transport infusion fluid through the infusion lumen and past the ablation transducer thereby providing convective cooling to the ablation transducer; and wherein the expandable basket is configured to actuate between a first collapsed configuration and a second expanded configuration. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An intravascular nerve modulation system, comprising:
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an elongate shaft having a proximal end region, a distal end region and an infusion lumen extending therebetween; an ablation transducer comprising an ultrasound transducer coupled to the distal end region of the shaft; an expandable basket coupled to the distal end region of the shaft, the expandable basket having a proximal end disposed proximal of the ablation transducer and a distal end disposed distal of the ablation transducer; an infusion sheath secured adjacent to the distal end of the elongate shaft in fluid communication with the infusion lumen, wherein the infusion sheath extends over the ablation transducer and is located within the expandable basket; wherein the system is configured to transport infusion fluid through the infusion lumen and past the ablation transducer thereby providing convective cooling to the ablation transducer; wherein the expandable basket is capable of shifting between a first configuration and an expanded configuration; and a sensor coupled to the expandable basket. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. An intravascular nerve modulation system, comprising:
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an elongate shaft having a proximal end region, a distal end region and an infusion lumen extending therebetween; an ultrasound transducer coupled to the distal end region of the shaft; an expandable basket coupled to the distal end region of the shaft, the expandable basket having a proximal end disposed proximal of the ultrasound transducer and a distal end disposed distal of the ultrasound transducer; an infusion sheath secured adjacent to the distal end of the elongate shaft in fluid communication with the infusion lumen, wherein the infusion sheath extends over the ablation transducer and is located within the expandable basket; wherein the system is configured to transport infusion fluid through the infusion lumen and past the ablation transducer thereby providing convective cooling to the ablation transducer; wherein the expandable basket is capable of shifting between a first configuration and an expanded configuration; a sensor coupled to the expandable basket; wherein the sensor is capable of contacting a vessel wall when the basket is in the expanded configuration; and
wherein the sensor is designed to monitor the progress of ablation by the ultrasound transducer during an ablation procedure. - View Dependent Claims (19)
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Specification