Patent ID: 8177717
Filing Date: 2012-05-15
Classification: A61B,G02B

Abstract:
1. An ultrasonic endoscope comprising an insertion portion including a distal hard portion, the insertion portion comprising: an ultrasonic transducer arranged in the distal hard portion; a treatment equipment lead-out hole that allows a treatment equipment to project in a direction toward an obliquely forward from a rear point of the ultrasonic transducer; a slant surface on which an endoscopic viewing section is formed, the slant surface being provided in a position rear of the treatment equipment lead-out hole; and a balloon removably arranged in a fit area on the ultrasonic transducer; wherein the distal hard portion comprises a balloon-fit groove between an arrangement region of the ultrasonic transducer and an opening of the treatment equipment lead-out hole; the balloon has an end including a retaining ring that fits in the balloon-fit groove; and the distal hard portion further comprises a treatment equipment guide member that slidably guides the treatment equipment, projecting out of the treatment equipment lead-out hole, across an arrangement area of the balloon-fit groove and up to a position on a beginning side of a scanning range of the ultrasonic transducer, wherein the treatment equipment guide member is allowed to rotatively displace between the distal hard portion comprises a stopper that positions the treatment equipment guide member in the treatment equipment guide position.