System and method for ultrasound ablation of tissue while compensating for collateral tissue
First Claim
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1. A method for ablating tissue, said method comprising:
- providing a catheter comprising an ultrasound transducer adjacent a distal end thereof, the ultrasound transducer configured to provide ablation energy and sensing energy;
positioning the ultrasound transducer adjacent target tissue;
ablating the target tissue with the ablation energy, the target tissue being ablated by providing a beam of ultrasound with the ultrasound transducer while moving the catheter to move the beam of ultrasound along a lesion path, thereby forming a continuous lesion in the target tissue;
disposing a detection device adjacent collateral tissue, the collateral tissue adjacent the target tissue, and the collateral tissue being different from the target tissue;
providing a processor coupled to the detection device and the motor unit to cooperate with the catheter, where the processor is instructed to perform the steps of;
identifying a location of the collateral tissue with the detection device; and
modifying the lesion path along which the beam of ultrasound is moved according to the instructions from the processor based on the identified location of the collateral tissue thereby avoiding or minimizing ablation of the collateral tissue,wherein modifying the lesion path comprises using a motor drive that is directed by the processor to move a tip of the catheter forwards or backwards, the motor drive being operatively coupled to the detection device and the catheter.
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Abstract
A tissue ablation method for treating atrial fibrillation in a patient comprises locating an ostium of a pulmonary vein and positioning an interventional catheter adjacent the ostium. The interventional catheter has an energy source. Collateral tissue adjacent the ostium is located and tissue around the ostium is ablated with energy from the energy source so as to form a contiguous lesion circumscribing the ostium. The lesion blocks aberrant electrical pathways in the tissue so as to reduce or eliminate the atrial fibrillation. The ablating is modified so as to avoid ablating or otherwise damaging the collateral tissue.
162 Citations
33 Claims
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1. A method for ablating tissue, said method comprising:
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providing a catheter comprising an ultrasound transducer adjacent a distal end thereof, the ultrasound transducer configured to provide ablation energy and sensing energy; positioning the ultrasound transducer adjacent target tissue; ablating the target tissue with the ablation energy, the target tissue being ablated by providing a beam of ultrasound with the ultrasound transducer while moving the catheter to move the beam of ultrasound along a lesion path, thereby forming a continuous lesion in the target tissue; disposing a detection device adjacent collateral tissue, the collateral tissue adjacent the target tissue, and the collateral tissue being different from the target tissue; providing a processor coupled to the detection device and the motor unit to cooperate with the catheter, where the processor is instructed to perform the steps of; identifying a location of the collateral tissue with the detection device; and modifying the lesion path along which the beam of ultrasound is moved according to the instructions from the processor based on the identified location of the collateral tissue thereby avoiding or minimizing ablation of the collateral tissue, wherein modifying the lesion path comprises using a motor drive that is directed by the processor to move a tip of the catheter forwards or backwards, the motor drive being operatively coupled to the detection device and the catheter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A system for ablating tissue, said system comprising:
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a catheter comprising an ultrasound transducer adjacent a distal end thereof, wherein the ultrasound transducer is configured to deliver ablation energy comprising a beam of ultrasound energy to target tissue and to move the beam of ultrasound energy along a lesion path, thereby ablating the target tissue and forming a continuous lesion in the target tissue, and a device comprising an elongated shaft and a detection device disposed adjacent a distal portion of the elongated shaft, wherein the device is configured to position the detection device adjacent a collateral tissue different from the target tissue, and wherein the detection device is configured to allow identification of a location of the collateral tissue; a motor unit operatively coupled to the device and the catheter; and a processor operatively coupled to the detection device and the motor unit, wherein the processor comprises instructions stored on non-transient, computer readable storage media to instruct the device to cooperate the catheter to modify the lesion path along which the beam of ultrasound energy is moved based on the identified location of the collateral tissue, and wherein the processor directs the motor unit to move the catheter along the modified lesion path;
thereby avoiding or minimizing ablation of the collateral tissue. - View Dependent Claims (16, 17, 18, 19, 20)
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21. A method for ablating tissue, said method comprising:
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(a) providing a system that comprises; (i) a catheter that comprises an ultrasound transducer adjacent a distal end thereof, wherein the ultrasound transducer is configured to deliver ablation energy that comprises a beam of ultrasound energy to target tissue and to move the beam of ultrasound energy along a lesion path, thereby ablating the target tissue and forming a continuous lesion in the target tissue; (ii) a device that comprises an elongated shaft and a detection device disposed adjacent a distal portion of the elongated shaft, wherein the device is configured to position the detection device adjacent a collateral tissue different from the target tissue, and wherein the detection device is configured to allow identification of a location of the collateral tissue; (iii) a motor unit operatively coupled to the device and the catheter; and (iv) a processor operatively coupled to the detection device and the motor unit, wherein the processor comprises instructions stored on non-transient, computer readable storage media to instruct the device to cooperate the catheter to modify the lesion path along which the beam of ultrasound energy is moved based on the identified location of the collateral tissue, and wherein the processor directs the motor unit to move the catheter along the modified lesion path;
thereby avoiding or minimizing ablation of the collateral tissue;(b) positioning the ultrasound transducer adjacent target tissue; and (c) ablating the target tissue to form a continuous lesion in the target tissue to form a lesion path. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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Specification