A Curved Applicator for Microwave Endometrial Ablation at A Frequency of 2.45GHz

Yasushi Kanaoka, 平井 光三, Osamu Ishiko, 石河 修, 荻田 幸雄
In: Journal of Microwave Surgery · 2001 · vol. 19 , pp. 51–54 · doi:10.3380/jmicrowavesurg.19.51 · W626704380
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⚙ AI-generated summary by gemini-2.5-flash-lite, 2026-07-16 ⓘ

A curved 2.45 GHz microwave applicator demonstrated feasible endometrial and myometrial coagulation in a surgical specimen with uterine distortion, achieving deep tissue degeneration with minimal serosal temperature increase.

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⚙ AI-generated deep summary by claude@2026-07, 2026-07-16 · read from full text ⓘ

The paper describes the development of a curved microwave applicator designed for microwave endometrial ablation in uteri with a distorted cavity. Using a surgical specimen model containing an intramural myoma node and adenomyosis, the authors introduced the applicator transcervically and coagulated 11 endometrial sites with 2.45 GHz microwaves (70 W for 50 seconds), assessing tissue effects by histologic observation. They report degeneration of the endometrium and adjacent myometrium to a depth of 7 mm, with complete destruction of the endometrium at the cornus, and a serosal surface temperature increase of less than 3°C after coagulation. This paper is centrally about endometriosis and/or adenomyosis — it explicitly uses a specimen containing adenomyosis to evaluate the curved microwave applicator’s ablative effects.

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Abstract

A curved microwave applicator was specifically developed for microwave endometrial ablation for the uterus with distorted cavity. The applicator was transcervically introduced to a uterine cavity of a surgical specimen with an intramural myoma node and adenomyosis, and 11 sites on the endometrium were coagulated by microwaves. The endometrium and neighboring myometrium 7mm in depth were degenerated at a power of 70W with a duration of 50sec. The endometrium at the cornus was found fully destroyed. Temperature increased less than three Celsius degrees on the serosal surface of the uterus at the end of microwave coagulation procedure. It is highly feasible to use the curved applicator for uteri enlarged with intramural or submucosal myomas in clinical setting.
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子宮内膜症 2.45GHzマイクロ波を用いるMicrowave Endometrial Ablationのための子宮内膜用電極の開発 2001 年 19 巻 p. 51-54 詳細 抄録 A curved microwave applicator was specifically developed for microwave endometrial ablation for the uterus with distorted cavity. The applicator was transcervically introduced to a uterine cavity of a surgical specimen with an intramural myoma node and adenomyosis, and 11 sites on the endometrium were coagulated by microwaves. The endometrium and neighboring myometrium 7mm in depth were degenerated at a power of 70W with a duration of 50sec. The endometrium at the cornus was found fully destroyed. Temperature increased less than three Celsius degrees on the serosal surface of the uterus at the end of microwave coagulation procedure. It is highly feasible to use the curved applicator for uteri enlarged with intramural or submucosal myomas in clinical setting. © 2001 特定非営利活動法人 Microwave Surgery研究会

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adenomyosis

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