BALLOON CATHETER APPARATUS WITH MICROWAVE EMITTER
First Claim
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1. A balloon catheter apparatus, comprising:
- an elongated shaft having a proximal end, a distal end, and adapted for positioning in an artery;
an emitter capable of emitting microwave energy positioned at the distal end;
an inflatable balloon associated with the emitter at the distal end; and
a control system at the proximal end.
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Abstract
A method and balloon catheter apparatus for tissue ablation is disclosed. The apparatus comprises an elongated shaft having a proximal end, a distal end, one or more central lumens, adapted for positioning in an artery; an emitter capable of emitting microwave energy positioned at the distal end; an inflatable balloon associated with the emitter at the distal end configured to allow blood to pass through the artery while the balloon is inflated; and a control system at the proximal end. The method and balloon catheter apparatus is applicable at least to renal denervation procedures.
32 Citations
37 Claims
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1. A balloon catheter apparatus, comprising:
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an elongated shaft having a proximal end, a distal end, and adapted for positioning in an artery; an emitter capable of emitting microwave energy positioned at the distal end; an inflatable balloon associated with the emitter at the distal end; and a control system at the proximal end. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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34. A balloon catheter apparatus, comprising:
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a catheter configured to house a flexible coaxial cable, a guide wire, and a sensor cable, wherein the coaxial cable and the sensor cable are in communication with a control system, and wherein the sensor cable is in communication with a sensor; an inflatable balloon located at a distal end of the catheter, the inflatable balloon comprising a length of 20 millimeters to 35 millimeters and capable of expanding to an outside diameter of 4 millimeters to 8 millimeters; a slot antenna positioned in the inflatable balloon and in communication with the coaxial cable, the antenna configured to emit microwave energy to a target tissue zone located 0.75 millimeters to 6.0 millimeters from an inner wall of a renal artery, wherein the antenna is radially centered in the inflatable balloon and located within a proximal half of the inflatable balloon, wherein tissue within the target tissue zone is heated by the emitted microwave energy to a temperature between 48°
C. and 65°
C.;at least one irrigation port located at the distal end of the balloon catheter apparatus configured to allow a fluid to exit the balloon catheter apparatus after the fluid has cooled elements of the balloon catheter apparatus and tissue outside the target tissue zone that may be heated as a consequence of emitting microwave energy from the antenna; and a control system comprising; a fluid pump configured to introduce fluid into a proximal end of the catheter at a flow rate of between 25 mL/min and 150 mL/min to maintain inflation of the balloon; a power amplifier capable of generating microwave energy for delivery to the target tissue zone for at least one energy application cycle ranging from 60 seconds to 240 seconds at a frequency within the range of 2.4 GHz and 2.5 GHz; a computer system capable of monitoring and regulating the delivery of microwave energy, the fluid pump, the sensor and antenna reflected power, wherein the computer system is programmable with a safety algorithm to ensure the balloon catheter apparatus operates within acceptable temperature and power ranges. - View Dependent Claims (35, 36, 37)
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Specification