| 摘要 |
This invention relates to an ultrasonic endoscope which includes a manipulating portion coupled to a light source device and an ultrasonic observation apparatus through a universal cord, an insertion portion inserted in a body cavity, and a sub-manipulating portion arranged between the insertion portion and the manipulating portion, an air-supply path and a suction path being arranged in the universal cord, the insertion portion having a distal end portion on which an observation optical system and an ultrasonic vibrator are mounted, the ultrasonic vibrator being covered with a balloon fixed to a surrounding portion of the distal end portion, and an optical system water-supply pipe for supplying water for washing the observation optical system and a balloon water-injection pipe for injecting water into the balloon being arranged in the insertion portion. The ultrasonic endoscope of this invention is provided with a water path switch means capable of causing the water-supply path in the universal cord to communicate with one or both of the optical system water-supply pipe and the balloon water-injection pipe in the insertion portion. |
