| 摘要 |
A free end of a second elastic member (19,119) secured to a housing ( 27,127) of a transducer is inserted into a coil-like first elastic member (41,141) secured to a distal end of an outer sheath (2,102). The portion between the housing (27) and the coil like first elastic member (41,141) at the free end of the catheter is thus reinforced to improve flexibility and prevent kinking of the catheter. In an embodiment, the housing (27) is made of insulating ceramic material. The insulation resistance of the housing (27) is thus made high so that a short between the electrodes of the oscillator does not occur even when the oscillator is in directly contact with the housing (27). An oscillator largest in size is allowed to be set in the housing. |
