JPH0666605U - Endoscope cover with channel - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a channel-equipped endoscope cover in which a treatment tool can always be easily inserted into and removed from a forceps channel. [Structure] An endoscope with a channel having a forceps channel (3) extending over a mouth part (20) for fixing an endoscope operation part, a deformable insertion part (15) and a hard tip part (1). Cover (50)
The insertion part (15) without being deformed
Forceps channel (3) in a section perpendicular to the long axis of (15)
Set the center coordinates of the position near the forceps outlet (9) of the hard tip (1),
The endoscope operating portion fixing mouth portion (20) and the insertion portion (15) are made substantially equal to each other in the vicinity of the connecting portion.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a cover endoscope and a channel-equipped endoscope cover used in combination with various treatment tools.

[0002]

[Prior art]

 Conventionally, as a medical endoscope in which various treatment tools are insertably / removably inserted to treat a target organ, an endoscope with a channel-equipped endoscope cover method in which an unclean portion can be discarded A mirror (hereinafter referred to as a cover-type endoscope) has been proposed (for example, Japanese Patent Publication No. 2-54734).

A channel-equipped endoscope cover used in this cover-type endoscope has a mouthpiece portion for fixing an endoscope operation portion, a deformable insertion portion, and a distal end hard portion. An endoscope insertion channel for inserting a mirror, a forceps channel for inserting various treatment tools, and the like are formed.

[0004]

[Problems to be solved by the device]

 However, in the conventional endoscope cover with a channel, the vicinity of the forceps outlet of the distal end hard portion and the vicinity of the connecting portion between the mouthpiece portion for fixing the endoscope operation portion and the insertion portion are different. The position of the forceps channels in the cross section is different. That is, the forceps channel is twisted at the insertion portion.

Therefore, when the treatment tool is inserted into the forceps channel, a large amount of force is required, and the operability is poor, and the treatment tool collides with the inner wall of the forceps channel and is damaged. This problem becomes more serious as the forceps channel becomes longer. In addition, if the forceps channel is twisted, it tends to buckle when it is bent, which makes it impossible to insert the treatment tool or damages the treatment tool or the forceps channel due to excessive insertion. is there.

The present invention has been made in view of such a problem, and provides an endoscopic cover with a channel appropriately configured so that a treatment tool can always be easily inserted into and removed from a forceps channel. The purpose is to

[0007]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides a channel-equipped endoscope cover having a mouthpiece portion for fixing an endoscope operation portion, a deformable insertion portion, and a forceps channel extending over a rigid tip portion. , The center coordinates of the forceps channel in a cross section perpendicular to the long axis of the insertion part without deforming the insertion part, the center of the forceps channel near the forceps exit of the distal end hard part, and the endoscope operation part fixing port. The body part and the vicinity of the connection part of the insertion part are made substantially equal.

[0008]

[Action]

 According to this structure, the forceps channel extends linearly between the rigid tip portion and the endoscope operating portion fixing mouth portion and the connecting portion of the insertion portion when the insertion portion is not deformed. become.

[0009]

【Example】

 FIG. 1 shows an embodiment of the present invention. This channel-equipped endoscope cover 50 has a tip portion 1, an insertion portion 15, and a mouth portion 20 for fixing the endoscope operation portion. A cover tip member 7 is provided on the tip portion 1, and an observation / illumination window 8, a forceps outlet 9 and an observation / observation window 8 are provided at the tip of the tip member 7 as shown in the front view of the tip member 7 in FIG. An endoscope in which a cleaning nozzle 69 for the illumination window 8 is provided, and the endoscope insertion channel 4 is formed at the rear end corresponding to each position as shown in the sectional view taken along the line AA of FIG. The insertion channel tube 70, the forceps channel tube 71 forming the forceps channel 3, and the air supply / water supply conduit 60 forming the air supply / water supply channel are connected to each other.

One end of the insertion portion 15 is water-tightly connected to the cover tip member 7 of the tip portion 1 and the other end is water-tightly connected to the endoscope operation portion fixing mouth portion 20, respectively, and the insertion portion cover skin 6 is provided. The endoscope insertion channel tube 70, the forceps channel tube 71, and the air / water supply conduit 60 are extended in the insertion portion cover outer skin 6. The insertion portion cover outer skin 6 has excellent flexibility, waterproofness, slipperiness, safety and the like, for example, a spiral steel strip (flex) and a braided steel wire (blade) that are laminated with a synthetic resin. In order to make it flexible, twistable, elastic, and bendable so that it can be easily inserted into the target organ in the body cavity with the cover endoscope (not shown) inserted, In particular, the material, thickness, and structure are set so that the curved portion near the tip portion 1 becomes more flexible. The curved portion may be a separate outer skin, for example, a thin member of a synthetic rubber tube.

The mouthpiece portion 20 for fixing the endoscope operation portion is provided with the respective connection portions of the endoscope insertion channel tube 70, the forceps channel tube 71, and the air supply / water supply conduit 60 on the distal end side thereof. , Connect the tubes corresponding to these connections in a watertight manner and fix them.

In this embodiment, with the insertion portion 15 naturally extended, the coordinates of the center O of the forceps channel tube 71 in the BB line cross section of FIG. 1 shown in FIG. 4 and the tip end portion shown in FIG. In order to make the coordinates of the center O of the forceps channel tube 71 in the cross section of 1 coincide with each other, the tubes 60, 70, 71 and the insertion portion cover outer skin 6 are made linear by passing a hard rod, for example. Also, make connections so that each tube itself does not rotate. Therefore, when the insertion portion 15 is naturally extended, the coordinates of the center O of the forceps channel tube 71 are substantially the same position in any cross section of the insertion portion 15. Each of the tubes 60, 70 and 71 is made of a synthetic resin such as PTFE having excellent flexibility and slipperiness, and when the endoscope for a cover is mounted in the tube 70 and the tube is bent, it is bent. It must have sufficient bending and tensile strength to withstand.

In addition, the forceps insertion conduit 28 having a forceps insertion port 22 that is in communication with the forceps channel 3 and that inserts various kinds of treatment tools 47 is provided in the endoscope operation unit fixing mouth unit 20 in the front downward direction. In addition to being formed, the operation portion insertion port 32 is formed in a trumpet shape so as to communicate with the endoscope insertion channel 4. In the forceps insertion conduit 28, a forceps plug attachment portion 26 is integrally formed at a portion of the forceps insertion port 22 so that the forceps plug 21 can be detachably attached. Further, two branch portions 23 are provided between the forceps insertion port 22 of the forceps insertion conduit 28 and the forceps channel tube 71, and the suction conduit 29 and the proximal side are provided in the branch portion 23 on the tip side (lower side) thereof. The suction tube attachment port 25 is integrally formed with the water injection conduit 74 and the irrigation water injection port 72 at the branch portion 23 on the rear end side (upper side). The tube 24 is connected, and the water injection tube 73 for injecting physiological saline is connected to the water injection port 72 for perfusion.

Further, the endoscope operation section fixing mouth body section 20 is integrally formed with an extension pipe path 35 and an extension tube attachment mouth body 34 in communication with the operation section insertion port 32 and the endoscope insertion channel 4. Then, at the time of inserting the cover endoscope, an expansion tube (not shown) is connected to the expansion tube attachment port 34 to supply air, thereby expanding the endoscope insertion channel tube 70 and covering it. Make it easy to insert a medical endoscope.

As described above, according to this embodiment, the coordinates of the center O of the forceps channel tube 71 are set at substantially the same position in any cross section of the insertion portion 15 in a state where the insertion portion 15 is naturally extended. Since the insertion portion 15 is bent or twisted with a large curvature along a duct of a body cavity, such as an esophagus or an intestinal tract, the insertion portion 15 is bent or twisted with a small curvature in various directions in the vertical and horizontal directions. Even if the forceps channel tube 71 is bent or twisted accordingly, the center position of the forceps channel tube 71 does not change significantly in the adjacent cross section below the hard length of the treatment instrument 47 in the insertion portion 15.

Therefore, when the treatment tool 47 is inserted from the forceps insertion port 22 through the forceps insertion conduit 28 and the forceps channel 3, and the distal end portion is projected from the forceps outlet 9, the treatment tool 47 is inserted. It can be inserted without pressing against the inner wall of the channel tube 71, and the amount of insertion force can be reduced. Further, since the treatment instrument 47 can be smoothly inserted, a relatively thick treatment instrument having an outer diameter substantially equal to the inner diameter of the forceps channel 3 can be used as the treatment instrument 47, and a treatment instrument having a long rigid length can also be used. it can.

In addition, in this embodiment, two branch portions 23 are provided in the forceps insertion conduit 28, and the suction conduit 29 and the proximal suction tube attachment port 25, the water injection conduit 74 and the perfusion are provided in these branch parts 23. Since the water injection port body 72 and the mouthpiece part 20 for fixing the endoscope operation section are provided integrally with each other, physiological saline is continuously injected during endoscopic observation of, for example, the bile duct or urinary organ of the organ. In order to secure a visual field by injecting physiological saline from the perfusion inlet 72, after stopping the water injection, it is possible to appropriately aspirate through the inlet side suction tube attachment 25. . It is also possible to inject a large amount of physiological saline from the perfusion inlet 72 to wash the inner wall of the organ, or inject a stain to stain the inner wall of the organ.

In this way, if the branch portion 23 of the water injection conduit 74 is provided in the forceps insertion conduit 28 separately from the suction conduit 29, it is only necessary to prepare the endoscope cover 50 with a channel to secure a visual field by water injection. Therefore, it is not necessary to prepare a separate branch pipe (commonly called T-shaped pipe). Further, since the water injection conduit 74 and the perfusion water injection port body 72 are provided integrally with the endoscope operation section fixing port body 20, the cost can be reduced. Further, since the endoscope cover with channel 50, the water injection conduit 74 and the water injection tube 73 can be integrated and sterilized, it is convenient at the time of use and after use Since it can be discarded together with the endoscope cover 50, there is an advantage that the trouble of disinfection and cleaning can be saved.

In the structure shown in FIG. 1, when the observation and illumination window 8 is provided on the cover tip member 7, the observation and illumination window 8 is covered with an adhesive, an ultraviolet curable adhesive or an instant adhesive. It is possible to adhere to the member 7 or to integrally form the cover tip member 7 and the observation / illumination window 8 with a transparent material, and to shield the portion other than the observation / illumination window 8 from light by painting. However, when an adhesive is used, automation is not easy and it takes a long time to assemble because it requires drying time. When using an ultraviolet-curing adhesive, the control of the coating amount is comparative. However, when an instant adhesive is used, its handling is not easy and the transparency of the observation / illumination window 8 may be lost. Further, in the case where the transparent material is integrally molded and the portion other than the observation / illumination window 8 is coated, there is a problem that the cost is increased. In particular, since the above-mentioned endoscope cover with a channel 50 is discarded after one use, it is necessary to produce it quickly, in a large amount and at a low cost, as compared with a conventional endoscope without a cover. Therefore, automation is desired. .

Therefore, in the above embodiment, the observation / illumination window 8 is attached to the cover tip member 7 by ultrasonic welding. In this ultrasonic welding, as shown in FIG. 5A, for example, a projection 7a is provided on the mounting portion of the cover tip member 7 where the observation / illumination window 8 is attached so as to come into contact with the entire bottom surface of the observation / illumination window 8. Alternatively, or as shown in FIG. 5B, a step 7b is formed in the attachment portion where the bottom edge of the observation / illumination window 8 contacts, and ultrasonic welding is performed. In this case, the observation / illumination window 8 is made of transparent resin such as polycarbonate or polystyrene suitable for ultrasonic welding, and the cover tip member 7 is colored, preferably black, similar to the observation / illumination window 8. Or other material such as Noryl (modified PPO).

In this way, the cover tip member 7 is fixed to the jig, the observation / illumination window 8 is dropped into the mounting portion, and then the surface of the observation / illumination window 8 is pushed by the ultrasonic horn, Apply ultrasonic vibration. As a result, in the case of FIG. 5A, it is welded by frictional heat concentrated on the projections 7a on the bottom surface of the observation and illumination window 8, and in the case of FIG. 5B, the side surface of the observation and illumination window 8 is shear welded (shear welded). Also, the welded surface is watertight in any case.

As described above, if the observation / illumination window 8 is attached by ultrasonic welding, the automation can be facilitated, and thus the production can be performed quickly, in large quantities, and at low cost.

It should be noted that the present invention is not limited to the above-described embodiments, but various modifications and changes can be made. For example, in the above-described embodiment, as shown in FIGS. 3 and 4, the air / water supply conduit 60 also includes the vicinity of the distal end portion 1, the endoscope operation portion fixing mouth portion 20, and the insertion portion 15. Although the same coordinates are formed in the vicinity of the connection portion with the, the fluid flows through this conduit 60, so that the layout of the cover tip member 7 and the mouth portion 20 for fixing the endoscope operation portion 20 Depending on the layout etc., the coordinates of both parts may be changed or intersected. The endoscope insertion channel 4 is preferably the same target, but may be slightly displaced.

Further, in the above-mentioned embodiment, the water injection conduit 74 is branched from the forceps insertion conduit 28 to form the water injection conduit 74, but the water injection conduit 74 is separate from the forceps insertion conduit 28. It may be formed over the insertion portion 15 and the mouthpiece portion 20 for fixing the endoscope operation portion. Further, instead of the forceps plug 21, a so-called T-shaped tube can be detachably connected to the forceps plug attachment portion 26 and used. In addition, the proximal suction tube attachment port 25 and the perfusion water injection port 72 are not limited to the upper surface of the endoscope operation part fixing port body 20 as long as they do not interfere with gripping or forceps insertion. It may be formed on the side surface or the rear portion.

Further, in the above-mentioned embodiment, the insertion portion cover outer cover 6, the air / water feeding conduit 60, the endoscope insertion channel tube 70, and the forceps channel tube 71 are respectively constituted by separate tube bodies. It may be a multi-lumen that is a part or all of the above. 6A to 6D are cross-sectional views showing four examples in this case, and FIG. 6A shows that the endoscope insertion channel 4 is formed integrally with the insertion portion cover outer skin 6, and the air supply conduit 60a, the water supply conduit 60b, and the forceps. Each of the channel tubes 71 is configured by a separate tube body. FIG. 6B shows a structure in which the forceps channel 3 is integrally formed with the outer cover 6 for the insertion portion, and the air supply conduit 60a, the water supply conduit 60b, and the endoscope insertion channel tube 70 are configured as separate tube bodies.

Further, in FIG. 6C, the forceps channel 3, the air supply conduit 60a and the water supply conduit 60b are formed integrally with the insertion portion cover outer skin 6, and the endoscope insertion channel tube 70 is configured by a separate tube body. In FIG. 6D, all the channels are formed integrally with the insert cover skin 6. In addition, in FIGS. 6A to 6D, one channel can also serve as the air supply conduit 60a and the water supply conduit 60b. Other than that, various multi-lumen modifications are possible.

[0027]

[Effect of device]

 As described above, according to the present invention, the center coordinates of the forceps channel in the cross section perpendicular to the long axis are fixed to the vicinity of the forceps outlet of the rigid tip and the endoscope operation portion fixing portion without deforming the insertion portion. The treatment tool can always be easily inserted / removed with respect to the forceps channel, because the mouth portion and the vicinity of the connection portion between the insertion portion are made substantially equal.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a front view of the tip portion shown in FIG.

FIG. 3 is a sectional view taken along the line AA of FIG.

FIG. 4 is a sectional view taken along line BB of FIG.

FIG. 5 is a diagram for explaining a method of mounting the observation / illumination window shown in FIG.

FIG. 6 is a cross-sectional view for explaining a modified example of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tip part 3 Forceps channel 4 Endoscope insertion channel 6 Insert part cover outer cover 7 Cover tip member 8 Observation and illumination window 9 Forceps outlet 15 Insertion part 20 Endoscope operation part fixing mouth part 47 Treatment tool 50 Inside with channel Endoscope cover 69 Cleaning nozzle 70 Endoscope insertion channel tube 71 Forceps channel tube

Front page continued (72) Hideo Ito 2-43-2 Hatagaya, Shibuya-ku, Tokyo Olympus Optical Industry Co., Ltd. (72) Yoshio Tashiro 2-43-2 Hatagaya, Shibuya-ku, Tokyo Olympus Optical Industrial Co., Ltd. (72) Inventor Minoru Yamazaki 2-43-2 Hatagaya, Shibuya-ku, Tokyo Olympus Optical Industry Co., Ltd. (72) Inventor Osamu Mizuta 2-43-2 Hatagaya, Shibuya-ku, Tokyo Olympus Inside Optical Industry Co., Ltd. (72) Keiichi Arai 2-43-2 Hatagaya, Shibuya-ku, Tokyo Inside Olympus Optical Industry Co., Ltd.

Claims (1)

[Scope of utility model registration request] 1. An endoscope cover with a channel having a forceps channel extending over an endoscope operation section fixing mouth, a deformable insertion section, and a rigid tip section, in which the insertion section is not deformed. The center coordinates of the forceps channel in a cross section perpendicular to the long axis of the insertion section at the connection between the forceps outlet vicinity of the distal end hard section, the mouthpiece section for fixing the endoscope operation section, and the insertion section. An endoscope cover with a channel, which is configured to be substantially equal to the vicinity of the portion.