| 摘要 |
PURPOSE:To improve the insertion performance and sticking performance of an ultra sonic wave endoscope which can stick under an ultrasonic wave guide. CONSTITUTION:The center axis of an insertion part and the scan axis of an ultrasonic wave probe 26 whose transmission/receiving wave surface 27 is directed to the side surface direction are deflected by a prescribed quantity (x) in the radial direction, and the outside diameter of a supporting part 25 for supporting the probe made thinner than the outside diameter of the supporting part 33 of a clamp port for leading out a sticking needle in free appearance and disappearance in the scan sectional surface 28 of the ultrasonic wave probe. An observation optical system 36 is arranged on the side of the clamp port, and in the insertion part, a clap channel and a probe signal cable system can be inserted on one side, and the insertion member of the observation optical system can be inserted on the other side. The sticking under an ultrasonic wave guide is enabled, and the insertion performance is improved by reducing the outside diameter of the insertion part except for the necessary part, without increasing the length of the top edge hard part, and the pain of a patient can be reduced. With the constitution in which the projection direction of the needle is set within a favourable image range of the probe in the state where the erection board 31 close to the clamp port is perfectly turned up to a stopper, the excellent sticking is enabled. |
