Characteristics of an antenna generating a localized heating region for robotic surgery

Abstract

Microwave energy devices can coagulate biological tissues without generating surgical smoke. Therefore, we proposed the doubleloop antenna for miniaturization and generating a localized heating to adapt microwave energy device for robotic surgery. The double-loop antenna consists of a double-loop and rod for changing the total antenna length. In order to evaluate the heating characteristics of our proposed antenna, the current distribution was calculated. As a result, it is confirmed that the combination of the double-loop and 10 mm rod can achieve uniform heating.

Development of microwave surgical energy device for suppressing backward heating

“…Tsugumi Nishidate (1) and Kazuyuki Saito (1) (1) Chiba University, Chiba, Japan; e-mail: 21wm4218@student.gs.chiba-u.jp Microwave surgical energy devices are used in laparotomy and laparoscopic surgery. This device can coagulate the biological tissue and stop bleeding by microwave heating.…”

“…Thus, the antenna that radiates the microwaves needs to be small. Therefore, we proposed a double-loop shape antenna for use in robotic surgery [1]. This antenna was designed for miniaturization and generating a localized heating, in order to apply microwave surgical energy device to robotic surgery.…”

Study of sleeve inner diameter to suppress backward heating for microwave surgical energy device

“…In recent years, the number of facilities introducing robotic surgery has increased, and various surgical devices are being applied to robotic surgery. From this background, in our previous study [22], the microwave surgical energy device was developed for use in robotic surgery. The proposed device could generate a localized heating region on the antenna which is microwave emitting part.…”

“…In surgical treatments which require delicate technique such as robotic surgery and laparoscopic surgery, the localized heating is required only at the antenna. However, the proposed device generated undesirable heating region around the feeding line in case the feeding line contacted to the biological tissue [23]. The heating region distributed around the feeding line is called backward heating.…”