JPH025409B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a suction operation switching device for an endoscope equipped with two forceps channels, which can selectively or simultaneously suction gas from the two forceps channels with a simple operation. .

When examining the inside of a living body cavity using an endoscope, when inserting biopsy forceps into the body cavity through the forceps channel to collect tissue pieces from the living body or performing contrast imaging with a catheter, the endoscope's objective lens window attached body fluids,
Leaked contrast media and smoke generated when tissue is cauterized with high-frequency instruments, lasers, etc., interfere with the examination and must be quickly removed by suction. When a treatment instrument is inserted, sufficient suction may not be obtained and accurate observation, diagnosis, or treatment may not be possible.

In such cases, in an endoscope equipped with two forceps channels, even if a treatment instrument such as biopsy forceps is inserted into one forceps channel, suction cannot be performed using the other forceps channel. However, until now, endoscopes have not been equipped with an operating device that allows a simple operation to select between two forceps channels and perform a suction operation.

The present invention has been made in view of the above points, and is an endoscope equipped with two forceps channels that enables suction of the two forceps channels selectively or simultaneously with a simple operation. The present invention aims to provide a suction operation switching device for an endoscope.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

Usually, an endoscope consists of a distal end which is the insertion part, a curved part, a flexible tube part and an operation part, a light guide flexible tube part,
It consists of an eyepiece part, and the tip part has a forceps channel opening, an objective window, an illumination window, an air/water supply nozzle, etc., and the operation part has a curved operation knob for controlling the direction of curvature of the curved part, and an air supply. - It is well known that a water supply operation button, a suction operation button, a forceps port, etc. are installed.

Although FIG. 1 shows a schematic cross-sectional view of an endoscope, only the parts related to the gist of the present invention are shown, and the illustration of other constituent parts is omitted.

In FIG. 1, first and second forceps channels 1 and 2 are formed of flexible plastic tubes or the like, and one end of the forceps channels 1 and 2 is formed at the distal end 3 of the endoscope. through hole portion 3a,
3b, and the other ends of forceps channels 1 and 2 are
Forceps ports 5 and 6 attached to the operating section 4 of the endoscope
is connected to.

The forceps channels 1 and 2 are branched within the operating section 4, and the branched tubes 1a and 2a (hereinafter branched tubes 1a and 2
(referred to as "a") indicates that the inside of the cylinder 7a of the switching operation section 7 provided on the operation section 4 of the endoscope is the cylinder 8 of the suction operation section 8 also provided on the operation section 4 of the endoscope.
The inside of the cylinder 8a is connected to the inside of the cylinder 8a through a communication pipe 9, and the inside of the cylinder 8a is connected with a suction pipe 10 that is connected to a suction device (not shown).

Note that the forceps ports 5 and 6 are usually provided with forceps plugs 11 and 12 made of synthetic rubber, etc., so that even when a treatment instrument such as forceps is inserted into the forceps ports 5 and 6, air is not blown into the body cavity. The valve structure has a valve structure that prevents air from leaking easily, and even when a suction operation is performed, the forceps plugs 11 and 12 prevent air from leaking from the forceps ports 5 and 6.

2 to 5 are diagrams showing the structure of the suction operation section 8 and the switching operation section 7. First, the suction operation section 8
To explain the structure, a valve body 13 is slidably fitted into the cylinder 8a of the suction operation section 8,
The valve body 13 has a flange portion of the valve body 13 and a cylinder 8a.
The valve portion 13a of the valve body 13 is normally biased in one direction (to the right in FIGS. 2 to 5) by a spring 14 elastically loaded between the peripheral edge of the valve body 13 and the peripheral edge of the valve body 13. is in pressure contact with a valve seat part 16 formed in the center of the inner wall of the cylinder 8a (an O-ring 15 is embedded in the circumferential surface of the valve part 13a), and a communication pipe 9 connected to the lower part of the cylinder 8a. Communication with the suction pipe 10 connected to the upper part of the cylinder 8a is cut off.

Moreover, the inner wall of the cylinder 8a and the main body 1 of the valve body 13
3b, an intake passage 17 of the suction pipe 10 is formed, and a suction device (not shown) usually connects to this intake passage 17.
It sucks in more outside air.

3 to 5 show the valve body 13 of the suction operation section 8.
is shown pushed into the cylinder 8a against the spring 14; in this state, the valve portion 13 of the valve body 13
a and the valve seat portion 16 are separated, and the communication pipe 9 and the suction pipe 10 communicate with each other, and the intake passage 17 between the inner wall of the cylinder 8a and the main body 13b of the valve body 13 is formed by an O-ring provided on the main body 13b. 18. Therefore, by selectively switching the switching operation section 9, which will be described later, suction can be performed from the communicating forceps channel.

Next, to explain the structure of the switching operation section, the cylinder 7a of the switching operation section 7 has a first forceps channel 1 and a second forceps channel 2, as described above.
The branch pipes 1a, 2a and the communication pipe 9 connected to the cylinder 8a of the suction operation unit 8 are connected, and the connection positions of the branch pipes 1a and 2a are 90 degrees At an angular interval of
The branch pipe 2a is connected to the connection position of the communication pipe 9.
They are connected at 180° angular intervals. Appendix 1
Reference numeral 9 denotes a switching valve rotatably fitted into the cylinder 7a, and the switching valve 19 includes the branch pipes 1a and 2a.
and T at the same position where the connecting pipe 9 is connected.
A letter-shaped communication hole 20 is formed.

Therefore, if the switching valve 19 is now set in the state shown in FIG. 2, if the valve body 13 of the suction operating section 8 is pushed into the cylinder 8a against the spring 14 as shown in FIG. , second forceps channel 2
Since the branch pipe 2a of the first forceps channel 1 is closed and the branch pipe 1a of the first forceps channel 1 and the suction pipe 10 are in communication with each other via the communication pipe 9, gas etc. from inside the body cavity can be removed using the first forceps channel 1. can be suctioned.

Next, as shown in FIG. 4, the valve body 13 is inserted into the cylinder.
When the switching valve 19 is rotated 90 degrees counterclockwise while being pushed into the forceps 8a, the branch pipe 1a of the first forceps channel 1 is closed, and the branch pipe 2a of the second forceps channel 2 is opened via the communication pipe 9. The suction pipe 10 communicates with the suction pipe 10, and it becomes possible to suction gas etc. from inside the body cavity using the second forceps channel 2.

Further, as shown in FIG. 5, when the switching valve 19 is rotated 180 degrees from the state shown in FIG. suction from the forceps channel becomes possible.

6 to 8 show another embodiment of the switching operation part 7, and this embodiment has a circumferential groove 21 on the circumferential surface,
By sliding the switching valve 19 having a switch valve 22 in a linear direction relative to the cylinder 7a, suction can be made from each forceps channel connected to the cylinder 7a.As shown in FIG.
When the forceps are fully slid in the pulling direction, the branch pipe 2a of the second forceps channel 2 is closed by the switching valve 19, while the branch pipe 1a of the first forceps channel 1 is connected to the switching valve 19. It communicates with the communication pipe 9 through the circumferential groove 21, and as described above, by operating the suction operation section 8, it becomes possible to suction gas etc. from the body cavity using the first forceps channel 1.

Next, when the switching valve 19 is pushed halfway into the cylinder 7a, as shown in FIG.
9, the branch pipe 2a of the second forceps channel 2 communicates with the communication pipe 9 through the circumferential groove 22 of the switching valve 19, and is closed by the second forceps channel 2 from inside the body cavity. It becomes possible to suction gas, etc.

Furthermore, when the switching valve 19 is fully pushed into the cylinder 7a as shown in FIG.
It communicates with the communication pipe 9 through this, and suction can be performed using both of the two forceps channels.

FIG. 9 shows another embodiment in which the switching operation section and the suction operation section are coaxially integrated.

In this embodiment, the cylinder 8a of the embodiment shown in FIGS. 2 to 5 has a double structure, and the inner cylinder 24 functions as a switching member. inner cylinder 24
is rotatable with respect to the outer cylinder 23, and the lower part of the outer cylinder 23 has a first one at a position 180° symmetrical about the axis of the outer cylinder 23.
and branch pipes 1a, 2 of the second forceps channels 1, 2.
A is connected to the upper part of the outer cylinder 23, and a clockwise direction from the position where the branch pipe 1a is provided is connected to the upper part of the outer cylinder 23.
A suction pipe 10 is connected at a position shifted by 90°. (In Fig. 9a, the suction pipe 10 is connected to the same position as the branch pipe 1a, but this is for convenience of illustration, and in reality, it is connected to the position shown in Fig. 9c. ) The valve body 13 is slidably fitted into the inner cylinder 24, but the valve body 13 and the inner cylinder 2
4 is the same as that in the embodiment shown in FIGS. 2 to 5, so common members are given the same reference numerals and their explanations will be omitted.

Further, in the lower part of the inner cylinder 24, on the circumference at the same position as the connection position of the branch pipes 1a, 2a to the outer cylinder 23, there are through holes 25, 26, 27 at positions shifted by 90 degrees in the clockwise direction. The outer cylinder 23 is provided at the upper part of the inner cylinder 24.
Through-holes 28, 29, and 30 corresponding to the through-holes 25, 26, and 27 are also provided on the circumference at the same position as the connection position of the suction pipe 10 to.

Therefore, when the inner cylinder 24 is in the state shown in FIG. 9, the branch pipe 1a of the first forceps channel 1 is connected to the through hole 26 of the inner cylinder 24 as shown in FIG. 9b.
and the branch pipe 2a of the second forceps channel 2
is closed by the inner cylinder 24, and the suction pipe 10 is aligned with the through hole 30 as shown in FIG. communicate with each other, and suction using the first forceps channel 1 becomes possible.

FIG. 10 shows a state in which the inner cylinder 24 has been rotated by 180 degrees from the state shown in FIG. 9. In this case, contrary to the above, the branch pipe 1a of the first forceps channel 1 has been 24, the branch pipe 2a of the second forceps channel 2 coincides with the through hole 26 of the inner cylinder 24, and the suction pipe 10 also coincides with the through hole 28 (not shown), so that the valve body 13 If it is pushed into the inner cylinder 24, the branch pipe 2a and the suction pipe 10 will communicate with each other.
Aspiration using the second forceps channel becomes possible.

FIG. 11 shows a state in which the inner cylinder 24 is rotated 90 degrees counterclockwise from the state shown in FIG. Both the pipes 1a and 2a coincide with the through holes 25 and 27 of the inner cylinder 24, and the suction pipe 10 also coincides with the through hole 29 (not shown), so if the valve body 13 is pushed into the inner cylinder 24, it will branch. Since the tubes 1a and 2a communicate with the suction pipe 10, simultaneous suction of each forceps channel is possible.

Furthermore, when the switching operation section and the suction operation section are coaxially integrated as shown in FIG.
As shown in the figure, the forceps channel 2 is directly supported by the cylinder 23, and a small hole 31 communicating into the cylinder is provided in the support part (as shown in FIG. 13), and the selective suction operation as described above is performed through this small hole 31. It is also possible.

In this case, not only one forceps channel
Both forceps channels may be supported by cylinders to create the above structure.

As described above, the present invention provides an endoscope equipped with two forceps channels, by providing a forceps channel switching operation section together with a suction operation section.
By operating the switching operation section, it is possible to selectively suction from one of the forceps channels or to suction at the same time. Sufficient suction can be obtained from the forceps channel, allowing for quick suction and removal of mucus that interferes with the examination, as well as burnt smoke generated when using an electric scalpel or laser irradiation, making it possible to conduct examinations safely. Occasionally, due to the pretreatment method, excrement may remain in the body cavity, interfering with examination and treatment, but it takes time to remove it by suctioning only from one forceps channel. However, if suction can be done from two forceps channels at the same time, it can be removed quickly. Furthermore, even if one forceps channel becomes clogged, suction can be effectively performed from the other forceps channel.

As described above, according to the present invention, suction can be easily performed from one of the forceps channels or two forceps channels at the same time using the switching operation section, and the suction can be adjusted according to the situation, which is extremely effective. big.

[Brief explanation of drawings]

FIG. 1 is a sectional view of an endoscope equipped with a suction operation switching device according to the present invention, FIGS. 2 to 5 are sectional views showing the relationship between the suction operation section and the switching operation section, and FIGS. Figure 8 is a sectional view of another embodiment of the switching operation section, Figure 9.
Figure a is a sectional view showing an embodiment in which the suction operation part and the switching operation part are coaxially integrated, and Figure 9b is A of Figure 9a.
-A sectional view, FIG. 9c is a BB sectional view of FIG. 9a, FIG. 10 is a sectional view of the inner cylinder rotated 180 degrees from the state of FIG. 9c, and FIG.
A sectional view of the inner cylinder rotated 90 degrees counterclockwise from the state shown in the figure, FIG. 12 is a sectional view of an endoscope equipped with the embodiment shown in FIG.
-A sectional view. 1, 2... Forceps channel, 4... Endoscope operation section, 7... Switching operation section, 7a... Cylinder, 8
... Suction operation part, 8a ... Cylinder, 9 ... Connection pipe, 10 ... Suction pipe, 13 ... Valve body, 1
3a... Valve part, 16... Valve seat part, 19... Switching valve, 20... Communication hole, 21, 22... Circumferential groove, 2
3...outer cylinder, 24...inner cylinder.

Claims (1)

[Scope of Claims] 1. In an endoscope equipped with two forceps channels, a suction pump disposed in the operation section of the endoscope that sucks gas, etc. in the body cavity is connected to the respective forceps channels, The two forceps channels can be operated selectively or simultaneously by switching between the suction operation section to be cut off and the forceps channel, which is also arranged in the operation section of the endoscope and communicated with the suction pump by the suction operation section. What is claimed is: 1. A suction operation switching device for an endoscope, comprising a switching operation section that allows suction to be performed using various methods. 2. The suction operating section is composed of a valve body and a cylinder into which the valve body is slidably fitted, and the valve body is normally biased in one direction to cut off communication between the suction pump and the forceps channel. , the valve portion of the valve body is pressed against a valve seat portion formed on the inner wall of the cylinder by the urging force, the suction operation switching of the endoscope according to claim 1 Device. 3 The switching operation section includes a cylinder to which the branch pipes of the first and second forceps channels and a communication pipe connected to the cylinder of the suction operation section are connected, and a switching section rotatably fitted to the cylinder. An endoscope according to claim 1, characterized in that by rotating the switching valve, suction can be performed using two forceps channels selectively or simultaneously. Suction operation switching device. 4 The switching operation section has a cylinder to which the branch pipes of the first and second forceps channels and the communication pipe connected to the cylinder of the suction operation section are connected, and a circumferential groove on the circumferential surface, and the above-mentioned The invention comprises a switching valve that is slidable in a linear direction with respect to a cylinder, and the sliding state of the switching valve enables suction using two forceps channels selectively or simultaneously. Range 1
A suction operation switching device for an endoscope as described in 2. 5 It is placed in the operating section of an endoscope equipped with two forceps channels, and connects the suction pump that suctions gas, etc. in the body cavity with each forceps channel.
a suction operation section that performs a shutoff operation; and a switching operation section that enables suction using two forceps channels selectively or simultaneously by switching the forceps channel that is communicated with the suction pump by the suction operation section. A suction operation switching device for an endoscope, characterized in that the suction operation section and the switching operation section are coaxially integrated.