Problem to be solved: to provide a medical device capable of more cauterizing cautery when the therapy for interrupting the transmission of electrical signals between the specific parts of the internal vessel wall is performed.The medical device of the present invention is provided with a tubular body in which an expandable balloon member is disposed at a distal end by supplying liquid to an internal space, and a drive shaft which can move the tubular body and the tip end of the drive shaft Provided with a laser irradiating portion for irradiating laser light capable of heating the liquid, and an ultrasonic element mounted on the tip end of the drive shaft and transmitting an ultrasonic wave to receive a reflected wave, said balloon member has said said super sound WaveThe ultrasonic wave transmitted from the child is transmitted and has a film which does not pass through the laser irradiation portion.Diagram【課題】生体管腔内壁の特定の部位間での電気信号の伝達を遮断する治療を施す際に、より安全な焼灼が可能な医療デバイスを提供する。【解決手段】本発明の医療デバイスは、内部空間に液体が供給されることで拡張可能なバルーン部材が先端部に配置された管状体と、前記管状体内を移動可能なドライブシャフトと、前記ドライブシャフトの先端部に取り付けられた、前記液体を加熱可能なレーザー光を照射するレーザー照射部と、前記ドライブシャフトの先端部に取り付けられた、超音波を発信し、反射波を受信する超音波素子と、を備え、前記バルーン部材が、前記超音波素子から発信される超音波は透過し、前記レーザー照射部からのレーザー光は透過しない膜を有する、ことを特徴とする。【選択図】図2
