A microwave antenna having a curved configuration is described herein. The antenna portion is formed into various shapes whereby the antenna substantially encloses, by a partial or complete loop or enclosure, at least a majority of the tissue to be irradiated. When microwave energy is delivered through the antenna, the curved configuration forms an ablation field or region defined by the curved antenna and any tissue enclosed within the ablation region becomes irradiated by the microwave energy. The microwave antenna is deployed through one of several methods, and multiple curved antennas can be used in conjunction with one another. Moreover, RF energy can also be used at the distal tip of the antenna to provide a cutting tip for the antenna during deployment in tissue.

A surgical snare comprising a means of delivering thermal plasma on to biological tissue encircled by the snare. The snare may be cold snare, i.e. formed from insulating material, or active, i.e. connected to receive RF and/or microwave energy to be radiated into the area encircled by the snare. The surgical snare may thus deliver into biological tissue encircled by a retractable loop any one of (i) a plasma to perform surface coagulation, (ii) a non-ionising microwave field (in the absence of plasma) to perform coagulation at a deeper level, and (iii) an RF field to assist with cutting.

Various aspects of the present disclosure are directed toward apparatuses, systems, and methods that may include a microwave ablation probe. The microwave ablation probe may include a feedline having an inner conductor, an outer conductor and a dielectric; and an antenna including a helical arm, the helical arm being electrically connected to the outer conductor of the feedline at a junction point, and a linear arm, the linear arm being electrically connected to the inner conductor of the feedline.

The present invention provides a microwave ablation probe comprising an antenna including a helical arm and a linear arm.

The present invention provides a microwave ablation probe comprising an antenna including a helical arm and a linear ann.

A device and method are disclosed for creating a lesion in tissue in a vicinity of a bronchus that contains nerve trunks, thereby thermally damaging the nerve trunks, while protecting the bronchus from injury. A catheter carrying a microwave antenna is positioned within the bronchus. Cooling fluid is circulated around the microwave antenna in thermal contact with the mucosa wall of the bronchus. Power is supplied to the microwave antenna to cause microwave energy to be emitted from the microwave antenna. The power supplied to the microwave antenna and the cooling fluid circulated around the microwave antenna are controlled to cause nerve trunks in the tissue in the vicinity of the bronchus to be heated to a temperature sufficient to cause thermal damage while the mucosa wall is maintained at a temperature where thermal damage does not occur.

An antenna system for tissue ablation includes an energy transmission member, a conductive hollow coil member coupled to the energy transmission member, and a fluid cooling system coupled to the conductive hollow coil member for providing a flow of cooling fluid through a member lumen of the conductive hollow coil member for cooling the conductive hollow coil member. In some examples, at least one of the antenna body, a choke member, and a hybrid choke member includes the conductive hollow coil member. In some examples, the hybrid choke member includes a choke portion wound around a portion of the energy transmission member, an antenna body portion wound around a portion of the energy transmission member, and an insulator portion extending between the choke portion and the antenna body portion. In some examples, the antenna system includes a sheath extending over the energy transmission member and the conductive hollow coil member.