Microwave applicator

摘要

A microwave applicator having a probe which comprises an elongate shaft (14), the shaft having an external tubular wall (18), a radiating portion (15) disposed at the distal end of the shaft (14), a transmission line (17) extending to the radiating portion internally of the tubular external wall (18), and an elongate flow dividing member (19) which co-extends with the transmission line (17) longitudinally of the shaft (14), the side wall of the transmission line (17) and the side wall of the flow dividing member (19) contacting each other and contacting the internal surface of the external tubular wall (18) at two-spatially separated discrete positions, thereby defining a pair of flow channels (20, 21) inside the shaft (14). In use, cooling fluid can pass down one channel (20) and return via the other channel (21). The structure of the probe is uncomplicated and the probe is straightforward to assemble.

主权项

1. A method of cooling a microwave applicator comprising:
inserting a microwave applicator into a treatment site, the microwave applicator comprising:
an elongated shaft having an external tubular wall;a microwave radiating portion near a distal end of the shaft;a flow dividing element comprising of a transmission line and a flow dividing member, the transmission line extending to the microwave radiating portion, the transmission line and floss dividing member extend longitudinally along the shaft, a cooling channel comprised of a first side, of the transmission line outer wall and a first side of the flow dividing member outer wall contacting each other, a return channel comprised of a second side of the transmission line outer wall and a second side of the flow dividing member outer wall contacting the internal surface of the external tubular wall at two-spatially separated locations to define a first flow passage and a second flow passage which extend longitudinally along the shaft; pumping a fluid into the cooling channel.