JP4358558B2 - Endoscope attachment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an endoscope attachment that is used by being attached to a hole such as a forceps or a suction port at the tip of an endoscope.
[0002]
[Prior art]
At the time of endoscopic treatment, a treatment tool such as forceps inserted through the insertion portion of the endoscope is taken out from a hole provided in the distal end surface of the endoscope, for example, a forceps / suction port, and a living tissue is gripped. There is a case where a treatment is performed, or a treatment is performed to suck water, blood, or the like around the treatment portion from the forceps / suction port.
In order to make these treatments possible even while observing with an endoscope, a technique in which a distal end hood is attached to the distal end of the endoscope has been proposed (for example, see Patent Document 1).
According to such a distal end portion of the endoscope, the endoscope field of view can be secured by the length of the hood of the distal end hood. Can be performed.
On the other hand, in order to suck and remove moisture and blood accumulated in the body cavity during the treatment, a suction rod having a suction tip portion provided with a plurality of through holes has been proposed (for example, Patent Documents). 2).
[0003]
[Patent Document 1]
Japanese Patent Laid-Open No. 11-4800 (FIG. 7)
[Patent Document 2]
US Pat. No. 4,066,664 (FIG. 2)
[0004]
[Problems to be solved by the invention]
However, in the above-described conventional technology, for example, the distal end portion of the endoscope described in Patent Document 1 is configured to cover the entire outer peripheral surface of the distal end portion of the endoscope, so that the endoscope is attached. There has been a disadvantage that the outer diameter of the distal end surface becomes larger than that of other insertion portions. Further, when the tip hood is attached to the endoscope tip surface, alignment with the forceps / suction port is required, and the tip hood may be displaced from the forceps / suction port during the procedure.
Furthermore, since the suction tip described in Patent Document 2 is not for an endoscope, there is a problem that it cannot be used for an endoscope in this state.
The present invention has been made in view of the above circumstances, and suppresses a portion projecting from the outer peripheral surface of the endoscope distal end portion, and ensures and easy attachment to a hole provided in the endoscope distal end surface. It is an object of the present invention to provide an endoscope attachment that can be performed as described above and enables treatment such as suction.
[0005]
[Means for Solving the Problems]
The present invention employs the following means in order to solve the above problems.
An endoscope attachment according to the present invention includes an attachment / detachment portion that is detachably engaged in a hole provided in a distal end surface of an insertion portion of the endoscope, and further protrudes outward from the distal end surface and is more outward than the insertion portion. A hollow hood portion having a small diameter, wherein the detachable portion is formed in a hollow shape, and the hood portion is spaced from an inner cylinder portion whose inner side is communicated with a lumen of the detachable portion, and the inner cylinder portion An inner cylinder tip through-hole communicating with the inner cavity of the detachable part is provided at the tip of the inner cylinder part, and the inner cylinder is provided at the tip of the outer cylinder part. An outer cylinder front end through hole communicating with the inner cylinder front end through hole is provided at a front end position than the inner cylinder front end through hole of the portion.
Since this endoscope attachment has the above-described configuration, it can be attached to the distal end surface of the endoscope only when necessary, and the endoscope can be easily handled when detached.
In addition, since it has a hollow detachable part that can be attached and detached in the hole part of the insertion part of the endoscope, and a hood part having an outer diameter smaller than that of the insertion part, the endoscope even if attached to the endoscope Protruding from the outer peripheral surface of the insertion portion in the radial direction can be suppressed.
Moreover, since it attaches directly in a hole part, the position alignment at the time of mounting | wearing becomes unnecessary, and it can suppress that it shifts in position with use.
Further, even when the outer cylinder tip through-hole of the outer cylinder portion is pressed against the biological tissue and blocked, the state in which the inner cylinder tip through-hole of the inner cylinder portion is not blocked can be maintained. Therefore, liquid such as water and blood sucked from the other through hole of the outer cylinder part can be sucked from the tip opening of the inner cylinder part.
Further, the air sucked from the through hole at a position not immersed in the liquid is circulated to the inner tube distal end through hole side through the space between the outer tube portion and the inner tube portion, thereby being on the distal end side of the endoscope attachment. Liquid can be sucked efficiently. As a result, high suction performance can be obtained in combination with direct suction from the tip through hole or the through hole immersed in the liquid.
[0006]
The endoscope attachment according to the present invention is the endoscope attachment, wherein the outer cylinder portion is provided with a plurality of through holes .
Since this endoscope attachment is provided with a plurality of through-holes, when sucking through the through-holes, even if any of the through-holes is blocked, suction can be continued from the remaining through-holes.
[0010]
Moreover, this invention is the said endoscope attachment, Comprising: It is preferable that the said outer cylinder part is provided with respect to the said attachment or detachment part so that attachment or detachment is possible.
Since this endoscope attachment is provided so as to be detachable with respect to the attachment / detachment portion, the inner tube portion and the outer tube portion can be easily washed by removing the outer tube portion from the attachment / detachment portion. It can be maintained well.
[0011]
Moreover, this invention is the said endoscope attachment, Comprising: It is preferable that the said food | hood part is comprised with the transparent member.
In this endoscope attachment, since the hood portion is formed of a transparent member, it is possible to perform the suction or treatment using the treatment tool while confirming the treatment status from the outside of the endoscope attachment. Also, the insertion status can be confirmed from the outside when the treatment instrument is inserted.
[0012]
In the endoscope attachment according to the present invention, it is preferable that the attachment / detachment portion is provided with a positioning step portion that protrudes radially outward from a portion inserted into the hole portion.
Since this endoscope attachment is provided with a positioning step, the insertion length is accurately determined when the positioning step hits the hole entrance when inserted into the hole, and the insertion length and the protrusion length are taken into account. It can be easily installed without it.
[0013]
In the endoscope attachment according to the present invention, it is preferable that a seal member is provided on an outer periphery of the attachment / detachment portion.
Since this endoscope attachment is provided with a seal member on the outer periphery of the attachment / detachment portion, when the endoscope attachment is attached to the hole portion, the airtightness can be maintained between the hole portion and the endoscope attachment, and suction is performed. However, high suction performance can be obtained while suppressing leakage.
Further, by using a sealing member having elasticity, the attaching / detaching portion can be press-fitted into the hole portion and fixed by the elasticity of the sealing member, and can be easily attached / detached.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
A first embodiment of the present invention will be described with reference to FIGS.
The endoscope attachment 1 according to the present embodiment is detachable from the distal end surface 3a side into a forceps / suction port (hole) 5A communicating with a forceps / suction channel 5 provided in the insertion portion 3 of the endoscope 2. A cylindrical attachment / detachment portion 6 that can be engaged and a cylindrical hood portion 7 that protrudes further outward from the distal end surface 3 a and has a smaller outer diameter than the insertion portion 3 are provided.
The forceps / suction channel 5 is formed in such a shape that the treatment instrument 8 inserted therein can advance and retreat, and by communicating with a suction pump (not shown), the liquid near the distal end surface 3a can be sucked. Yes.
The distal end surface 3a is provided with distal ends of an observation objective lens 10 and an illumination light guide 11, respectively.
[0015]
The hood portion 7 is made of, for example, a transparent member such as resin, and a through-hole 12 communicating with the forceps / suction port 5A is provided at the distal end portion 7a. The through-hole 12 is provided with an inner diameter that allows the treatment tool 8 inserted through the insertion portion 3 to enter and exit. The edge portion of the tip portion 7a of the hood portion 7 is chamfered to facilitate insertion into the body.
On the distal end side of the detachable portion 6, a positioning step portion 13 that protrudes outward in the radial direction from the forceps / suction port 5 </ b> A is provided. A plurality of O-rings (seal members) 14 are provided along the axial direction on the outer periphery 6 a of the detachable portion 6.
The endoscope attachment 1 is positioned when the flange surface 13a on the rear end side of the positioning step portion 13 is in contact with the front end surface 3a.
[0016]
Next, a method of using the endoscope attachment 1 of the present embodiment configured as described above and the endoscope 2 equipped with the endoscope attachment 1 will be described.
First, the endoscope attachment 1 is attached to the endoscope 2 before the endoscope 2 is inserted into the body cavity.
When attaching, the detachable portion 6 is inserted into the forceps / suction port 5A from the distal end side of the insertion portion 3 to a position where the flange surface 13a of the positioning step portion 13 is in contact with the distal end surface 3a.
At this time, since the O-ring 14 is pressed in while being crushed on the inner surface of the forceps / suction channel 5, airtightness is maintained between the outer periphery of the detachable portion 6 and the inner surface of the forceps / suction channel 5.
[0017]
Subsequently, the treatment tool 8 is inserted into the forceps / suction channel 5 of the insertion portion 3 and inserted into the body cavity to approach the living tissue 15 to be treated.
After making it approach, the treatment tool 8 is pushed out from the insertion part 3 side.
At this time, while illuminating the surroundings with the light guide 11 and confirming the insertion state inside the hood portion 7 through the objective lens 10, the distal end side of the treatment instrument 8 is externally connected from the distal through hole 12 as shown in FIG. And projecting to a predetermined position.
At this time, since the treatment instrument 8 is in a state where the portion between the through hole 12 and the forceps / suction port 5A is supported by the hood portion 7, an interval is provided between the distal end surface 3a and the living tissue 15. Even when it is desired to press the treatment tool 8 against the living tissue 15 in a state where the treatment tool 8 is pressed, the treatment tool 8 can be pressed firmly while suppressing the bending thereof.
[0018]
According to this endoscope attachment 1, the cylindrical attachment / detachment portion 6 that can be attached / detached inside the forceps / suction port 5 </ b> A of the endoscope 2 and the cylindrical hood portion 7 having an outer diameter smaller than that of the insertion portion 3 are provided. Since it is equipped, it can suppress protruding from the outer peripheral surface of the insertion part 3 of the endoscope 2 in the radial direction when it is mounted.
Further, since the detachable portion 6 is directly attached to the forceps / suction port 5A, it is not necessary to align the through-hole 12 and the forceps / suction port 5A, and it is possible to suppress displacement due to use.
At this time, since the positioning step portion 13 is provided, when the insertion portion is inserted into the forceps / suction port 5A, the positioning step portion 13 abuts against the entrance of the forceps / suction port 5A so that the insertion length is accurately determined. It can be easily mounted without considering the sheath protrusion length.
[0019]
Furthermore, since the O-ring 14 is provided on the outer periphery of the attaching / detaching portion 6, airtightness can be maintained between the forceps / suction channel 5 and the outer periphery of the attaching / detaching portion 6, and leakage is suppressed even if suction is performed. High suction performance.
Further, since the O-ring 14 has elasticity, when the detachable portion 6 is press-fitted into the forceps / suction channel 5, it can be fixed by the elasticity of the O-ring 14 and can be easily detachable. it can.
In addition, since the distance between the distal end surface 3a and the living tissue 15 can be appropriately maintained by the hood portion 7, a space for this length can be secured as the field of view of the objective lens 10 of the endoscope 2. Since it is composed of a transparent member, it is possible to observe the insertion status and treatment status of the treatment instrument.
[0020]
Note that the endoscope attachment 1 may be used only for the treatment of either forceps or suction.
When used for suction, since the objective lens 10 and the through-hole 12 are arranged apart from each other, suction can be performed while confirming the suction state via the objective lens 10.
[0021]
Next, a second embodiment according to the present invention will be described with reference to FIGS. In the following description, the same reference numerals are given to the components described in the above embodiment, and the description thereof is omitted.
The second embodiment is different from the first embodiment in that, in the first embodiment, one through hole 12 is provided on the distal end side of the endoscope attachment 1 whereas the second embodiment is different from the first embodiment. In this embodiment, as shown in FIG. 4, the hood portion 16 includes an inner cylinder portion 17 whose inner side communicates with the forceps / suction port 5 </ b> A, and an outer side that covers the outer peripheral side of the inner cylinder portion 17 with a space 18. It is a point provided with the cylinder part 20.
[0022]
An inner cylinder tip through-hole 17a communicating with the forceps / suction port 5A is provided at the tip of the inner cylinder portion 17. In addition, a plurality of suction holes (through holes) 21 are provided on the outer peripheral surface of the outer cylindrical portion 20, and the distal end of the outer cylindrical portion 20 is located at a distal end position than the inner cylindrical distal end through hole 17 a of the inner cylindrical portion 17. An outer cylinder tip through hole 20a is formed.
The inner cylinder distal end through-hole 17a and the outer cylinder distal end through-hole 20a are formed to have an inner diameter that allows the treatment tool 8 to enter and exit.
A male screw portion 23A and a female screw portion 23B are provided on the inner surface 20b of the outer cylinder portion 20 on the side of the attachment / detachment portion 6 and the hood portion attachment surface 13b of the positioning step portion 13, and are screwed to each other. The outer cylinder part 20 is detachably provided with respect to 6.
[0023]
Next, a method of using the endoscope attachment 22 of the present embodiment configured as described above and the endoscope 2 equipped with the endoscope attachment 22 will be described.
The endoscope attachment 22 can also perform a liquid suction treatment as well as the same use as the endoscope attachment 1 according to the first embodiment. Hereinafter, a case where a predetermined treatment with the treatment tool 8 is performed following the suction will be described.
First, in the state where the endoscope attachment 22 is attached to the forceps / suction port 5 </ b> A, the endoscope attachment 22 is brought close to the vicinity of the liquid 25 such as water accumulated in the living tissue 15.
Then, as shown in FIG. 6, the outer cylinder tip through hole 20 a of the outer cylinder portion 20 is inserted into the liquid 25.
[0024]
In this state, when suction is started by a suction pump (not shown), the suction of the liquid 25 from the suction hole 21 immersed in the liquid 25 among the suction holes 21 provided in the outer cylinder portion 20 starts. Suction into the forceps / suction channel 5 through the tube tip through hole 17a.
After the suction is completed, instead of a suction pump (not shown), as shown in FIG. 7, the treatment tool 8 is inserted into the insertion portion 3, and the treatment tool 8 is further pushed out from the insertion portion 3 toward the distal end side. Then, a predetermined treatment is performed by inserting the inside of the attaching / detaching part 6 and the inner cylinder part 17 and projecting the outer cylinder tip through hole 20a to the outside.
[0025]
According to this endoscope attachment 22, since a plurality of suction holes 21 are provided in the outer cylinder portion 20 in addition to the outer cylinder tip through hole 20a, even if any one of the suction holes 21 is blocked during suction. Suction can be continued from the remaining suction holes 21.
Further, since the outer cylinder tip through-hole 20a of the outer cylinder portion 20 is formed so as to protrude from the inner cylinder tip through-hole 17a of the inner cylinder portion 17, the outer cylinder tip through-hole 20a of the outer cylinder portion 20 is the living tissue 15. The inner cylinder opening 17a of the inner cylinder part 17 is not blocked even if the inner cylinder part 17 is blocked by suction or the like. Therefore, the liquid 25 or the like sucked from the suction hole 21 can be sucked from the inner cylinder opening 17a.
[0026]
Further, even if air is sucked from the suction hole 21 that is not immersed in the liquid 25, the sucked air is circulated to the inner cylinder tip through-hole 17 a side through the space 18 between the outer cylinder part 20 and the inner cylinder part 17. Thus, the liquid 25 can be efficiently sucked, and high suction performance is achieved in combination with the direct suction from the inner cylinder tip through-hole 17a and the outer cylinder tip through-hole 20a and the suction hole 21 at the position immersed in the liquid 25. Obtainable.
Moreover, since the outer cylinder part 20 is provided detachably with respect to the attachment / detachment part 6, the inner cylinder part 17 can also be wash | cleaned by removing the outer cylinder part 20 from the attachment / detachment part 6, and a sanitary state is favorable. Can be maintained.
[0027]
The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.
For example, the shape of the hood portion 7 is not limited to a cylindrical shape, and may be a hood portion 27 in which a plurality of through holes 26 are provided with a distal end side as a convex surface 27a as shown in FIG.
Moreover, the outer cylinder part 20 and the inner cylinder part 17 are good also as engagement by not only the screwing by a screw | thread but fitting etc. of a recessed part and a convex part.
Further, the seal member is not limited to the O-ring 14 and may be a sheet-like elastic seal member or the like wound around the outer periphery of the detachable portion.
[0028]
【The invention's effect】
The present invention described above has the following effects.
According to the endoscope attachment of the present invention, the endoscope attachment can be inserted into the body cavity without changing the outer diameter of the endoscope insertion portion. Further, it is possible to prevent the position of the hole from being displaced during the treatment compared to the conventional case, and it is possible to easily and reliably perform treatment and suction with the treatment tool.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing an endoscope distal end portion to which an endoscope attachment according to a first embodiment of the present invention is attached.
FIG. 2 is a diagram showing a front view of an endoscope distal end portion to which the endoscope attachment according to the first embodiment of the present invention is mounted.
FIG. 3 is a perspective view showing treatment by the treatment tool in a state where the endoscope attachment according to the first embodiment of the present invention is mounted.
FIG. 4 is a view showing a cross section of an endoscope attachment according to a second embodiment of the present invention.
FIG. 5 is a cross-sectional view showing a distal end portion of an endoscope equipped with an endoscope attachment according to a second embodiment of the present invention.
FIG. 6 is a cross-sectional view showing a distal end portion of an endoscope in a state where an endoscope equipped with an endoscope attachment according to a second embodiment of the present invention is immersed in water.
FIG. 7 is a cross-sectional view showing the distal end portion of the endoscope in a state where the endoscope attachment according to the second embodiment of the present invention is attached and treatment is performed with the treatment tool.
FIG. 8 is a perspective view showing an endoscope attachment according to another embodiment of the present invention.
[Explanation of symbols]
1, 22 Endoscope attachment 2 Endoscope 3 Insertion part 5 Forceps / Suction port (hole)
6 Detachable part 7, 16, 27 Hood part 12, 26 Through hole 13 Positioning step part 14 O-ring (seal member)
17 Inner cylinder portion 17a Inner cylinder tip through hole 18 Interval 20 Outer cylinder portion 20a Outer cylinder tip through hole 21 Suction hole (through hole)

Claims (6)

A detachable portion that is detachably engaged in a hole provided in the distal end surface of the insertion portion of the endoscope ;
A hollow hood portion that protrudes further outward from the tip surface and has a smaller outer diameter than the insertion portion;
The detachable part is formed in a hollow shape,
The hood portion includes an inner cylinder portion whose inner side is communicated with a lumen of the detachable portion, and an outer cylinder portion that covers the inner cylinder portion with a space therebetween,
An inner cylinder tip through-hole communicated with the inner cavity of the detachable part is provided at the tip of the inner cylinder part,
An outer cylinder tip through hole that communicates with the inner cylinder tip through hole is provided at a tip position of the inner cylinder portion at a tip position than the inner cylinder tip through hole of the inner cylinder portion. Endoscope attachment. The endoscope attachment according to claim 1 , wherein the outer cylinder portion is provided with a plurality of through holes . The endoscope attachment according to claim 1 , wherein the outer cylinder portion is provided so as to be detachable with respect to the detachable portion. The endoscope attachment according to any one of claims 1 to 3 , wherein the hood portion is formed of a transparent member. In the detachable unit, the endoscope according to any one of claims 1 4, characterized in that positioning step portion protruding radially outward of the portion inserted into the hole portion is provided Mirror attachment. The endoscope attachment according to any one of claims 1 to 5 , wherein a seal member is provided on an outer periphery of the detachable portion.

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