Endoscope

Patent metadata

Field	Value
Publication number	US-9782058-B2
Application number	US-201615149251-A
Country	US
Kind code	B2
Filing date	May 9, 2016
Priority date	Jul 17, 2014
Publication date	Oct 10, 2017
Grant date	Oct 10, 2017

Abstract

An endoscope includes an insertion portion; an operation portion; a balloon water injection channel; a first opening portion; a balloon pipe sleeve provided with a first end portion and a second end portion; a branch channel connection unit; a rotation restriction portion; and a connecting tube on which the branch channel connection unit is assembled.

First claim

What is claimed is:

1. An endoscope comprising:
an insertion portion to be inserted into a subject;
an operation portion connected to a proximal end side of the insertion portion;
a main channel configured to be tubular and placed in the insertion portion and the operation portion;
a first opening portion located at the operation portion and formed at a proximal end of the main channel;
a branch channel provided with a first end portion and a second end portion, where the second end portion opens outside the operation portion;
a branch channel connection unit connected so as to be communicated with the first opening portion of the main channel and the first end portion of the branch channel;
a rotation restriction portion provided on the branch channel connection unit;
a connecting tube which is fixed to the operation portion, and on which the branch channel connection unit is assembled; and
a notch which is formed through the connecting tube between an inside and an outside of the connecting tube, and to which the rotation restriction portion is fitted such that the rotation restriction portion protrudes out of the connecting tube;
wherein the main channel is a balloon water injection channel for supplying an ultrasound transmission medium to a balloon which is provided at the insertion portion, the balloon water injection channel being provided separately from a treatment instrument insertion channel arranged inside the insertion portion; and
the endoscope further comprises an ultrasound transducer provided at a distal end side of the insertion portion, the ultrasound transducer being configured to transmit and receive ultrasound.

2. The endoscope according to claim 1 , wherein the branch channel connection unit comprises:
a pressing member fixed to the connecting tube by a fixing member and provided with the rotation restriction portion, the fixing member fixing the branch channel connection unit to the connecting tube; and
a block unit fixed to the pressing member and configured to restrain the first end portion of the branch channel.

3. The endoscope according to claim 1 , wherein:
a fixing area in which the branch channel connection unit is fixed to the connecting tube by a fixing member is spaced away from a holding area of the first end portion of the branch channel on the branch channel connection unit toward a proximal end, the fixing member fixing the branch channel connection unit to the connecting tube; and
the rotation restriction portion fitted in the notch formed through the connecting tube extends from the holding area to the fixing area of the insertion portion in an insertion axis direction.

4. The endoscope according to claim 1 , wherein the connecting tube comprises a second opening portion used to introduce the branch channel connection unit into the connecting tube.

Assignees

• Olympus Corp

Inventors

• Ogawa Tomoaki

Classifications

• A61B1/00119

  Tubes or pipes in or with an endoscope · CPC title

• A61B1/00128

  mechanical, e.g. for tubes or pipes · CPC title

• A61M25/0028

  characterized by features relating to at least one lumen located at the proximal part of the catheter, e.g. alterations in lumen shape or valves (catheter hubs A61M25/0097) · CPC title

• A61B1/012 Primary

  characterised by internal passages or accessories therefor · CPC title

• A61B1/00

  Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes (examination of body cavities or body tracts using ultrasonic, sonic or infrasonic waves A61B8/12; endoscopic instruments for taking cell samples or for biopsy A61B10/04); Illuminating arrangements therefor (for the eyes A61B3/00) · CPC title