# US 2016/0249792 A1 · Endoscope

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- Number: US 2016/0249792 A1
- Document ID: US20160249792A1
- Status: Published application
- Kind: A1
- Application number: 15/149,251
- Filed: 2016-05-09
- Published: 2016-09-01
- Earliest claimed: 2014-07-17
- Assignees: Olympus Corporation
- Applicants: Olympus Corporation
- Inventors: Tomoaki OGAWA
- Web page: https://patentgrep.com/patent/US20160249792A1

## CPC

- A61B 1/012: characterised by internal passages or accessories therefor
- A61B 1/00: 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)
- A61B 1/00119: {Tubes or pipes in or with an endoscope}
- A61B 1/00128: {mechanical, e.g. for tubes or pipes}
- A61B 8/12: in body cavities or body tracts, e.g. by using catheters
- A61M 25/0028: {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)}
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)
- A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)}

## Abstract

An endoscope includes an insertion portion; an operation portion; a balloon 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.

## Claims

### Claim 1

An endoscope comprising:
an insertion portion 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;
a first opening portion formed at a proximal end of the main channel on a side of the operation portion;
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; and
a connecting tube which is fitted in the rotation restriction portion and fixed to the operation portion, and on which the branch channel connection unit is assembled.

### Claim 2 (depends on 1)

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

### Claim 3 (depends on 1)

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

### Claim 4 (depends on 1)

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.