PROBLEM TO BE SOLVED: To provide a trans-body cavity cauterization device that can cauterize a wide range of tissues using an ultrasonic wave element for HIFU, while maintaining a distance from a body wall surface of an ultrasonic wave element for HIFU, and to provide a mounting unit.SOLUTION: A trans-body cavity cauterization device is used by an ultrasonic endoscope having an ultrasonic probe for receiving at least an ultrasonic echo for use in the internal observation at the tip of an insertion section inserted into a body of a subject. The device includes: a HIFU ultrasonic wave element capable of applying high-density energy at a focal position by oscillating an ultrasonic wave a HIFU holding member for holding the HIFU ultrasonic wave element, and mounted at the tip of the insertion section and focal position changing means mounted on the HIFU holding member to support the HIFU holding member, and changing the focal position of the HIFU ultrasonic wave element.COPYRIGHT: (C)2014,JPO&INPIT【課題】HIFU用の超音波素子の体内壁面からの距離を維持した状態で、HIFU用の超音波素子による広範囲な組織の焼灼を行うことができる経体腔式焼灼デバイスおよび取付ユニットを提供すること。【解決手段】被検体の体内に挿入される挿入部の先端に、少なくとも体内の観測に用いる超音波エコーを受信する超音波探触子を有する超音波内視鏡に用いられる経体腔式焼灼デバイスであって、超音波を発振して焦点位置で高密度のエネルギーを照射可能なHIFU超音波素子と、HIFU超音波素子を保持するとともに、挿入部の先端に取り付けられるHIFU保持部材と、HIFU保持部材に取り付けられ、該HIFU保持部材を支持するとともに、HIFU超音波素子の焦点位置を変更する焦点位置変更手段と、を備えた。【選択図】図1
