JP4010797B2 - Endoscope - Google Patents

Description

[0001]
【Technical field】
The present invention relates to an endoscope having a forceps channel and an auxiliary water supply channel.
[0002]
[Prior art and its problems]
There is a type of endoscope that includes both a forceps channel for projecting various forceps from the distal end of the insertion portion and a sub-water supply channel for supplying a cleaning solution and a staining solution. In such an endoscope, the forceps projecting opening of the forceps channel and the auxiliary water supply hole (exit portion) of the auxiliary water supply channel are provided independently on the distal end surface of the insertion portion, and the cleaning liquid and the staining liquid are transferred from the auxiliary water supply hole to the forceps. Generally, it is ejected in a direction substantially parallel to the axis of the channel.
[0003]
By the way, in endoscopic surgery or clinical examination, when a body tissue is excised using a high-frequency snare 23 ′ projected from a forceps projecting opening 21 ′ as shown in FIG. In this case, it is preferable that the cleaning liquid is ejected from the auxiliary water supply hole 31 ′ to wash the bleeding part so that the treatment site can be easily observed and the treatment is advanced. However, when the ejection direction of the auxiliary water supply hole 31 ′ is parallel to the axis of the forceps channel 20 ′, the cleaning liquid does not hit the bleeding part even if the cleaning liquid is ejected in the state where the treatment is being performed. The part could not be washed. For this reason, each time the bleeding part is washed, it is necessary to temporarily stop the treatment and adjust the distal end position of the insertion part 11 'so that the cleaning liquid hits the bleeding part, and a quick response cannot be taken.
[0004]
Conventionally, no special problem has been pointed out with respect to the arrangement of the sub-water supply holes, but it has been found that the following problems occur when the sub-water supply holes are arranged in the vicinity of the outer periphery of the distal end surface of the insertion portion. That is, when the auxiliary water supply operation is performed with the insertion portion 11 ′ approaching the inner wall of the body cavity as shown in FIG. 9, the liquid ejected from the auxiliary water supply hole 31 ′ may be blocked by the raised portion of the inner wall of the body cavity. .
[0005]
OBJECT OF THE INVENTION
In view of the above problem awareness, an object of the present invention is to obtain an endoscope that can easily perform a treatment and a sub-water supply operation and can stably perform the sub-water supply operation.
[0006]
SUMMARY OF THE INVENTION
The present invention provides a forceps projecting opening of a forceps channel and a sub-water supply channel of an auxiliary water supply channel at the distal end of a body insertion portion provided with an observation window of an objective optical system and an air / water supply nozzle that is a cleaning nozzle for the observation window. In the endoscope in which the hole is opened, the auxiliary water supply hole of the auxiliary water supply channel is arranged on the center side of the forceps projecting opening of the forceps channel on the distal end surface of the body insertion portion, and the direction of the auxiliary water supply hole is The forceps channel is set in a direction intersecting with the extending direction of the forceps protruding opening of the forceps channel. Specifically, for example, the auxiliary water supply hole of the auxiliary water supply channel can be arranged such that the distance from the auxiliary water supply hole to the observation window is shorter than the distance from the forceps projecting opening of the forceps channel to the observation window.
[0007]
According to this configuration, the liquid ejected from the auxiliary water supply hole is not blocked by the raised portion in the body cavity, and the cleaning liquid is ejected from the auxiliary water supply hole toward the front of the forceps protruding opening. The part can be easily cleaned. As a result, the work efficiency is improved, so that a quick treatment can be performed.
[0008]
When a large-diameter forceps channel and a small-diameter forceps channel are provided as forceps channels, it is preferable to set the direction of the auxiliary water supply hole in a direction crossing the extension direction of the forceps protruding opening of the small-diameter forceps channel. In other words, since the forceps channel through which the treatment tool for cutting the body tissue is inserted has a smaller diameter, the direction of the auxiliary water supply hole is preferably set to the extension direction of the forceps port of the small diameter forceps channel.
[0009]
It is preferable that the extension direction of the auxiliary water supply hole of the auxiliary water supply channel intersects with the extension direction of the forceps protruding opening of the forceps channel near the best focus position of the objective optical system. According to this configuration, since the cleaning liquid is supplied in the vicinity of the best focus position of the objective optical system, the bleeding part can be cleaned while observing in a good state.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows a medical endoscope 10 according to an embodiment of the present invention. The endoscope 10 is provided at the distal end of the universal tube 13, a flexible internal insertion portion 11, a grip operation portion 12 that an operator grips, a universal tube 13 that extends from the grip operation portion 12, and the universal tube 13. It has a connector part 14 and is detachable from the video processor 2 via the connector part 14. As shown in FIG. 2, an observation window 15, an illumination window 16, an air / water supply nozzle 17, a forceps projecting opening (forceps channel outlet) 21, and a sub-water supply hole (sub-water supply) are formed on the distal end surface 11a of the body insertion portion 11. (Channel outlet portion) 31 and the like are arranged. An objective lens (not shown) is disposed behind the observation window 15, and an image formed by the objective lens is converted into an electronic image by an imaging means (not shown) and can be observed on the monitor 3 via the video processor 2. A light distribution lens (not shown) is disposed behind the illumination window 16, and the light distribution lens is connected to the light distribution lens through the universal tube 13, the grasping operation unit 12, and the in-body insertion unit 11 through a light guide. Illumination light from a light source (not shown) included in the video processor 2 is given. The air / water supply nozzle 17 is a nozzle for cleaning the observation window 15.
[0012]
The grip operation unit 12 is provided with a bending operation knob 18 for bending the vicinity of the distal end portion of the in-vivo insertion portion 11 in the vertical direction or the left-right direction, and the connection between the grip operation unit 12 and the in-vivo insertion portion 11 is provided. The part is provided with a forceps insertion protrusion (forceps channel inlet) 22 that communicates with the forceps protrusion opening 21. Further, the connector portion 14 is provided with a sub-water supply inlet (sub-water supply channel inlet portion) 32 that communicates with the sub-water supply hole 31. The auxiliary water supply inlet 32 can be connected to an auxiliary water supply device 5 for sending a cleaning solution, a staining solution, or the like to the endoscope 10 via the auxiliary water supply tube 4. When the auxiliary water supply inlet 32 is provided in the connector portion 14 in this way, the auxiliary water supply tube 4 can be shorter than when the auxiliary water supply inlet is provided in the grip operation portion 12, and at the time of endoscope operation. The auxiliary water supply tube 4 does not interfere with the operation.
[0013]
In the endoscope 10 described above, the forceps channel 20 that guides the treatment tool inserted into the forceps insertion protrusion 22 to the forceps protrusion opening 21 and the sub-water supply hole 32 are made to circulate the liquid supplied to the sub-water supply hole 31. A water supply channel 30 is provided. As shown in FIG. 3, the auxiliary water supply channel 30 is inclined in a direction gradually approaching the extension direction of the axis of the forceps channel 20, and the auxiliary water supply hole 31 intersects with the extension direction of the forceps protruding opening 21 (see FIG. 3). (In the direction of arrow 3). The liquid sent from the auxiliary water supply device 5 to the auxiliary water supply channel 30 is ejected from the auxiliary water supply hole 31 in a direction crossing the extending direction of the forceps protruding opening 21 and supplied to the front of the forceps protruding opening 21. When a treatment is performed using a treatment tool, the treatment site is usually in front of the forceps projection opening 21 where the treatment tool projecting from the forceps projection opening 21 is located (the extension direction of the forceps projection opening 21). Therefore, when there is bleeding from the treatment site, the bleeding part can be easily cleaned by ejecting the cleaning liquid from the auxiliary water supply hole 31, and there is no need to interrupt the treatment for the cleaning operation. If the treatment and the auxiliary water supply work can be performed in this way, the work efficiency is improved and a quick treatment is possible. FIG. 3 shows a case where the high-frequency snare 23 is used as a treatment instrument.
[0014]
As shown in FIG. 4, the auxiliary water supply hole 31 is disposed closer to the observation window 15 than the forceps protruding opening 21. That is, the distance R1 (center distance) from the observation window 15 to the auxiliary water supply hole 31 is set to be shorter than the distance R2 (center distance) from the observation window 15 to the forceps protruding opening 21. When the auxiliary water supply hole 31 is arranged closer to the center of the distal end surface 11a than the forceps projecting opening 21 as described above, the auxiliary water supply hole 31 is used when performing the auxiliary water supply operation with the body insertion portion 11 approaching the inner wall of the body cavity. The liquid ejected from the water is not obstructed by the raised portion of the inner wall of the body cavity, and a stable sub-water supply operation can be performed.
[0015]
5 and 6 show a second embodiment of the endoscope according to the present invention. The endoscope according to this embodiment includes a large-diameter forceps channel 24 for inserting a treatment tool for grasping a body tissue and a small-diameter forceps channel 25 for inserting a treatment tool for cutting the body tissue. As shown in FIG. 5, in addition to the observation window 15, the illumination window 16, and the air / water supply nozzle 17, a large-diameter forceps as an outlet of the large-diameter forceps channel 24 is projected on the distal end surface 11 a of the body insertion portion 11. An opening 24 a, a small-diameter forceps protruding opening 25 a that is an outlet portion of the small-diameter forceps channel 25, and a secondary water supply hole 31 of the secondary water supply channel 30 are provided. The auxiliary water supply hole 31 is disposed closer to the center of the distal end surface 11a than the large-diameter forceps projecting opening 24a and the small-diameter forceps projecting opening 25a so that liquid can be stably fed even if there is a raised portion on the inner wall of the body cavity. .
[0016]
The auxiliary water supply channel 30 of the present embodiment is inclined in a direction gradually approaching the extending direction of the axis of the small-diameter forceps channel 25, and the auxiliary water supply hole 31 intersects with the extending direction of the small-diameter forceps protruding opening 25a (see FIG. (In the direction of arrow 6). That is, the liquid supplied from the auxiliary water supply device 5 to the auxiliary water supply channel 30 is ejected from the auxiliary water supply hole 31 in a direction crossing the extending direction of the small diameter forceps protruding opening 25a and supplied to the front of the small diameter forceps protruding opening 25a. . Therefore, when there is bleeding from the treatment site, the bleeding part can be easily cleaned by ejecting the cleaning liquid from the auxiliary water supply hole 31, and there is no need to interrupt the treatment for the cleaning operation. As described above, in an endoscope having a plurality of forceps channels, by setting the direction of the auxiliary water supply holes so that liquid can be fed in front of the forceps projecting openings of the forceps channels through which the treatment tool for cutting the body tissue is inserted. The treatment and the auxiliary water supply work can be performed in parallel.
[0017]
FIG. 7 shows a third embodiment of the endoscope according to the present invention. In this embodiment, the extension direction of the auxiliary water supply hole 31 of the auxiliary water supply channel 30 and the extension direction of the forceps projecting opening 21 of the forceps channel 20 intersect in the vicinity of the best focus position of the objective lens 19 located behind the observation window 15. It is the embodiment set to do. That is, the liquid supplied from the auxiliary water supply device 5 to the auxiliary water supply channel 30 is ejected from the auxiliary water supply hole 31 in a direction crossing the extending direction of the forceps protruding opening 21, in front of the forceps protruding opening 21, and It is supplied in the vicinity of the best focus position of the objective lens 19. When the auxiliary water supply is supplied in the vicinity of the best focus position of the objective lens 19 in this way, the treatment site can be cleaned while observing the monitor 3 in a good state, and the operability is improved. Even in this case, the treatment and the auxiliary water supply work can be performed in parallel. An imaging means (CCD) is disposed behind the objective lens 19, but is omitted in FIG. 7 for simplification.
[0018]
While the present invention has been described with reference to the illustrated embodiment, the endoscope of the present invention is not limited to the illustrated embodiment. For example, the present invention can be applied to an optical endoscope using an optical fiber or an eyepiece instead of an image pickup means (CCD).
[0019]
【The invention's effect】
According to the present invention, it is possible to easily perform the treatment and the sub-water supply work, and to obtain an endoscope that can stably carry out the sub-water supply work.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram showing a first embodiment of an endoscope according to the present invention.
FIG. 2 is a perspective view showing a distal end surface of an in-vivo insertion portion of the endoscope.
FIG. 3 is a schematic diagram for explaining the direction of the auxiliary water supply hole shown in FIG. 2;
FIG. 4 is a schematic diagram for explaining the arrangement of the auxiliary water supply holes.
FIG. 5 is a perspective view showing a distal end surface of an in-vivo insertion portion of an endoscope according to a second embodiment.
6 is a schematic diagram for explaining the direction of the auxiliary water supply hole shown in FIG.
FIG. 7 is a schematic diagram for explaining directions of auxiliary water supply holes provided in an endoscope according to a third embodiment.
FIG. 8 is a schematic diagram for explaining a problem of a sub-water supply hole provided in a conventional endoscope.
FIG. 9 is a schematic diagram for explaining another problem of the auxiliary water supply hole provided in the conventional endoscope.
[Explanation of symbols]
2 Video processor 3 Monitor 4 Sub-water supply tube 5 Sub-water supply device 10 Endoscope 11 Internal body insertion part 12 Grasping operation part 13 Universal tube 14 Connector part 15 Observation window 16 Illumination window 17 Air / water supply nozzle 18 Bending operation knob 19 Objective lens 20 Forceps channel 21 Forceps projection opening 22 Forceps insertion protrusion 23 High-frequency snare 24 Large diameter forceps channel 24a Large diameter forceps projection opening 25 Small diameter forceps channel 25a Small diameter forceps projection opening 30 Secondary water supply channel 31 Secondary water supply hole 32 Secondary water supply inlet

Claims (4)

The forceps channel opening and the auxiliary water supply channel's auxiliary water supply hole are opened at the distal end of the body insertion portion provided with the observation window of the objective optical system and the air / water supply nozzle that is the cleaning nozzle for this observation window. In the endoscope
The auxiliary water supply hole of the auxiliary water supply channel is disposed at the center side of the forceps projecting opening of the forceps channel on the distal end surface of the body insertion portion, and the direction of the auxiliary water supply hole intersects with the extension direction of the forceps protruding opening of the forceps channel. An endoscope characterized by being set in a direction to perform. The endoscope according to claim 1, wherein the auxiliary water supply hole of the auxiliary water supply channel is arranged such that a distance from the auxiliary water supply hole to the observation window is shorter than a distance from the forceps projecting opening of the forceps channel to the observation window. Endoscope that has been. The endoscope according to claim 1 or 2, wherein the forceps channel includes a large-diameter forceps channel and a small-diameter forceps channel, and the direction of the auxiliary water supply hole is in a direction intersecting with the extending direction of the forceps protruding opening of the small-diameter forceps channel. Endoscope set. The endoscope according to any one of claims 1 to 3, wherein an extension direction of the auxiliary water supply hole of the auxiliary water supply channel and an extension direction of the forceps protruding opening of the forceps channel are in the vicinity of the best focus position of the objective optical system. Crossing endoscope.

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