PROBLEM TO BE SOLVED: To grasp the position of an ultrasonic vibrator in x-ray fluoroscopy without impairing the performance as an ultrasonic catheter in the ultrasonic catheter.SOLUTION: The ultrasonic catheter includes a long catheter sheath 2 used by inserting into a body cavity or lumen a driving shaft 10 which is incorporated into the catheter sheath 2, transmits a mechanical driving force from the front side to the tip side of the catheter sheath 2, and is provided with a processing part with stage in which staging processing is given to its tip end and a housing 11 provided with the ultrasonic vibrator and/or an ultrasonic reflection plate connected to the tip side of the driving shaft 10. In the ultrasonic catheter 1 in which the driving shaft is rotated by an external driving source, an x-ray contrast property administering means 12 is disposed on the tip side end of the driving shaft 10. The processing part with early stage of the driving shaft 10 is connected to the inner side of the housing 11 overlapping in part, and the x-ray contrast property administering means 12 is disposed between the overlapping.COPYRIGHT: (C)2011,JPO&INPIT【課題】 超音波カテーテルにおいて、超音波カテーテルとしての性能を損なわずに、X線透視下における超音波振動子の位置の把握を可能とする。【解決手段】 体腔或いは管腔内に挿入して用いられる長尺なカテーテルシース2と、該カテーテルシース2内に内蔵され該カテーテルシース2の手元側から先端側まで機械的駆動力を伝達し、先端端部が段付き加工を施された段付き加工部を備えた駆動シャフト10と、該駆動シャフト10の先端側に接続された超音波振動子及び/または超音波反射板を備えたハウジング11と、を備え、駆動シャフトを外部駆動源により回転させる超音波カテーテル1において、前記駆動シャフト10の先端側端部にX線造影性投与手段12が設置され、前記駆動シャフト10の前期段付き加工部が前記ハウジング11の内側に一部重なり合って接続され、X線造影性投与手段12がこの重なりの間に設置されていることを特徴とする超音波カテーテル1。【選択図】 図2
