BALLOON CATHETER APPARATUS WITH MICROWAVE EMITTER

摘要

A microwave ablation system and method is disclosed comprising a balloon catheter apparatus and a control system. The balloon catheter apparatus comprises a catheter configured to house a coaxial cable and one or more coolant channels, an inflatable balloon located at the distal end of the catheter, and an antenna positioned in the inflatable balloon and in communication with the coaxial cable. The control system comprises a fluid pump configured to introduce fluid into a proximal end of the catheter, 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 600 seconds at a frequency ranging from 2.4 GHz to 2.5 GHz, and a computer system configured to monitor and/or regulate the delivery of microwave energy to the target tissue, the fluid pump, at least one sensor, and antenna reflected power.

主权项

1. A microwave ablation system, comprising:
a balloon catheter apparatus, comprising
a catheter configured to house a coaxial cable and one or more coolant channels;an inflatable balloon located at the distal end of the catheter, the inflatable balloon comprising a length of 10 to 45 millimeters; andan 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 within a range from 0.5 millimeters to 12.0 millimeters radially from an inner wall of an artery, wherein tissue within the target tissue zone is heated by the emitted microwave energy to a temperature from 40° C. to 100° C.;wherein the one or more coolant channels are configured to cool one or more elements of the microwave ablation system and/or non-targeted tissue lying 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;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 600 seconds at a frequency ranging from 2.4 GHz to 2.5 GHz; anda computer system configured to monitor and/or regulate the delivery of microwave energy to the target tissue, the fluid pump, at least one sensor, and antenna reflected power, wherein the computer system comprises a safety algorithm to ensure the microwave ablation system operates within acceptable temperature and power ranges.