PROBLEM TO BE SOLVED: To provide an image diagnosis catheter capable of suppressing depolarization of an ultrasound transducer in an unused state, thereby preventing the degradation of the quality of diagnostic images.SOLUTION: The image diagnosis catheter comprises: a sheath inserted into a body cavity of a living body an ultrasound transducer inserted into the sheath and capable of transmitting and receiving ultrasound a connector part 200 provided at the proximal end of the sheath an electrode terminal 210 arranged inside the connector and electrically connected to an external electrode terminal 310 of an external device 300 which transmits/receives an electrical signal to/from the ultrasound transducer a conductive member 230 arranged inside the connector part and electrically connected to a positive electrode 210a and a negative electrode 210b of the electrode terminal to short-circuit the two electrodes and a switching part 240 configured for cancelling the short-circuited state between the two electrode made by the conductive member upon connection of the electrode terminal and the external electrode terminal.SELECTED DRAWING: Figure 4COPYRIGHT: (C)2017,JPO&INPIT【課題】未使用状態における超音波振動子の消極を抑制して、診断画像の品質の劣化を防止することのできる画像診断用カテーテルを提供する。【解決手段】画像診断用カテーテルは、生体の体腔内に挿入されるシースと、シース内に挿入されて超音波を送受信可能な超音波振動子と、シースの基端部に設けられたコネクタ部200と、コネクタ部内に配置され、超音波振動子との間で電気信号を送受信する外部装置300が備える外部電極端子310と電気的に接続される電極端子210と、コネクタ部内に設けられて、電極端子の正極210aおよび負極210bに電気的に接続されて両電極を短絡状態にする導電部材230と、電極端子と外部電極端子との接続に伴って、導電部材による両電極の短絡状態を解除可能に構成された切り替え部240と、を有する。【選択図】図4
