Endoscope distal end for treatment tools, observation and fluid supply

Patent metadata

Field	Value
Publication number	US-12290234-B2
Application number	US-202217705393-A
Country	US
Kind code	B2
Filing date	Mar 28, 2022
Priority date	Mar 29, 2021
Publication date	May 6, 2025
Grant date	May 6, 2025

Abstract

There is provided an endoscope that allows treatment, which uses treatment tools, to be performed accurately.
An observation window is disposed across a vertical axis in a distal end surface region positioned above a horizontal axis; a first treatment tool outlet port is disposed across the vertical axis in a distal end surface region positioned below the horizontal axis; a second treatment tool outlet port is disposed across the horizontal axis in a distal end surface region positioned below a line, which passes through a center of the observation window and is parallel to the horizontal axis, and in a distal end surface region positioned on a left side of the vertical axis; and a front water supply port is mainly disposed in the distal end surface region positioned below the line, which passes through the center of the observation window and is parallel to the horizontal axis, and in a distal end surface region positioned on a side opposite to the second treatment tool outlet port with respect to a line that passes through a center of the first treatment tool outlet port and is parallel to the vertical axis.

First claim

What is claimed is:

1. An endoscope comprising:
an observation window that is provided on a distal end surface of an insertion unit bendable in an up/down direction and a left/right direction and is used to observe an inside of an object to be examined;
a first treatment tool outlet port which is provided on the distal end surface and out of which a first treatment tool is capable of being led;
a second treatment tool outlet port which is provided on the distal end surface and out of which a second treatment tool is capable of being led; and
a front water supply port that is provided on the distal end surface and jets liquid to a portion to be observed in the object to be examined,
a first treatment tool channel, having a proximal end of the first treatment tool channel configured as a first treatment tool inlet port, and a distal end of the first treatment tool channel configured as the first treatment tool outlet port,
wherein in a case where an axis, which is parallel to the left/right direction, of two axes, which pass through a center of the distal end surface and are orthogonal to each other, is defined as a first axis and an axis thereof parallel to the up/down direction is defined as a second axis as the distal end surface is viewed from a front,
the observation window is disposed across the second axis and above the first axis,
the first treatment tool outlet port is disposed across the second axis and below the first axis and a center of the first treatment tool outlet port is on a right side of the second axis,
the second treatment tool outlet port is disposed on a left side of the second axis and across the first axis and below a first line that passes through a center of the observation window and the first line is parallel to the first axis, and
a center of the front water supply port is disposed below the first line and on a side opposite to the second treatment tool outlet port with respect to a second line that passes through the center of the first treatment tool outlet port and the second line is parallel to the second axis,
wherein the first treatment tool outlet port and the front water supply port are fixed to the distal end surface,
wherein the center of the first treatment tool outlet port and the center of the front water supply port are fixed with respect to each other.

2. The endoscope according to claim 1 ,
wherein in a case where, among four divided regions into which the distal end surface is divided by the first axis and the second axis, an upper right divided region is defined as a first quadrant, an upper left divided region is defined as a second quadrant, a lower left divided region is defined as a third quadrant, and a lower right divided region is defined as a fourth quadrant, the front water supply port is disposed in the fourth quadrant.

3. The endoscope according to claim 1 ,
wherein the second treatment tool outlet port has a diameter larger than a diameter of the first treatment tool outlet port.

4. The endoscope according to claim 1 ,
wherein the observation window is disposed in a center-side region that is a region closer to a center than an outer periphery of the distal end surface.

5. The endoscope according to claim 1 ,
wherein a distance between the center of the observation window and a center of the second treatment tool outlet port is longer than a distance between the center of the observation window and the center of the first treatment tool outlet port.

6. The endoscope according to claim 1 ,
wherein the distal end surface includes a first surface and a second surface that protrudes in a direction toward a distal end of the insertion unit from the first surface,
the front water supply port is disposed on the first surface, and
the observation window is disposed on the second surface.

7. The endoscope according to claim 6 , further comprising:
a first illumination window that is provided on the second surface.

8. The endoscope according to claim 1 ,
wherein in a case where, among four divided regions into which the distal end surface is divided by the first axis and the second axis, an upper right divided region is defined as a first quadrant, an upper left divided region is defined as a second quadrant, a lower left divided region is defined as a third quadrant, and a lower right divided region is defined as a fourth quadrant, an air/water supply nozzle is provided in the second quadrant.

9. The endoscope according to claim 8 , further comprising:
a second illumination window that is provided on the distal end surface,
wherein the second illumination window is disposed to be offset to an outer periphery of the distal end surface on a side opposite to the center of the distal end surface with respect to a line connecting the center of the observation window to a center of the air/water supply nozzle.

10. The endoscope according to claim 9 ,
wherein the second illumination window is disposed on the second axis.

Assignees

• Fujifilm Corp

Inventors

• Kawamoto Yuta

Classifications

• A61B1/00087

  Tools (A61B17/00234 takes precedence) · CPC title

• A61B1/00045

  Display arrangement · CPC title

• A61B1/018 Primary

  for receiving instruments · CPC title

• A61B2217/005

  with suction drainage system · CPC title

• A61B1/07

  using light-conductive means, e.g. optical fibres · CPC title