JPH0984755A - Endoscopic device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the diameter of a sheath insert part, increase the diameter of a usable treatment tool, and further simplify the form of each part, thereby facilitating the cleaning of each part, in an endoscopic device having a mutually independent liquid feed passage and liquid discharge passage and performing an observation while circulating a clean liquid into a visual field through them. SOLUTION: This device has a sheath 4 having a sheath insert part 10, a scope 2 having a scope insert part 6 to be inserted through the space within the sheath insert part 10, a bridge 3 inserted into the sheath insert part 10 along the insert axial direction, and having a partitioning plate 23 for partitioning the space within the sheath insert part 10 into a plurality of areas with the pipe line inner surface of the sheath insert part 10 to form a liquid feed passage and a liquid discharge passage independently communicating with a water feed port 31 and a drain port 26, respectively, and an attachably and detachably fixing mechanism 16 capable of optionally attaching and detaching the sheath 4 to and from each of the bridge and the scope 2.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to insertion into a body cavity,
The present invention relates to an endoscope apparatus for observing the inside of a body cavity while perfusing a clean liquid in order to secure a cavity area and wash away blood, smoke, and the like generated during treatment.

[0002]

2. Description of the Related Art In recent years, endoscopes have been widely used to observe and treat organs and the like. In general,
When observing or treating the inside of a body cavity using an endoscope, it is necessary to wash out the blood or body fluid that has flowed out, or remove the smoke generated during the treatment to ensure a good visual field at all times. For this reason, a water supply channel and a drainage channel separate from the water channel are provided between the outer sheath inserted into the body cavity and the scope inserted inside the body cavity, and a clean water is provided in the scope's visual field through the water channel. The liquid is sent in, and the sent liquid is discharged from the drainage channel together with unnecessary materials.

For example, in Japanese Utility Model Publication No. 61-94003, an optical system is provided in an inner pipe having a flat cross section, and the flat inner pipe and the liquid injection inner pipe are formed into a circular outer pipe (sheath). Inserted and placed in a loose fit state, the hollow portion formed between the outer surface of the flat inner tube and the inner tube for injecting liquid and the inner surface of the outer tube is configured as a drainage flow path. Roscope is disclosed. In the endoscope apparatus of the type in which the liquid is perfused in this way, the liquid injection inner tube is particularly inserted in the circular outer tube.

[0004]

[Problems to be Solved by the Invention]

(Problem) In the conventional endoscope apparatus, since it is necessary to provide a water supply channel and a drainage channel in the outer sheath, it is necessary to further provide another pipe in the pipe of the sheath insertion portion. Therefore, the space in the outer sheath is wasted, and as a result, there is a restriction that the space of the insertion portion of the treatment instrument to be used is narrowed or the diameter of the sheath insertion portion is increased. Moreover, since the structure has a plurality of elongated pipes, it becomes very difficult to clean the inside thereof.

(Object) The present invention provides an endoscopic device for observing a liquid while perfusing a clean liquid into a visual field through a liquid supply passage and a drainage passage, which are independent of each other. The object of the present invention is to make it possible to increase the diameter of the treatment tool that can be used and used, and to make each part simple so that each part can be easily washed.

[0006]

According to the present invention, a sheath having a pipe-shaped sheath insertion portion and provided with a liquid supply port and a liquid discharge port communicating with a space inside the sheath insertion portion, and a sheath inside the sheath insertion portion are provided. A scope that has a scope insertion portion that is inserted through a space and observes the operative field from the tip of the sheath insertion portion,
The space in the sheath insertion portion is inserted into the sheath insertion portion along the insertion axis direction, and the space in the sheath insertion portion is divided into a plurality of regions between the inner surface of the conduit of the sheath insertion portion and at least one surface of the outer surface of the scope insertion portion. A partition, a bridge having partition means for forming a liquid supply path and a liquid discharge path, which communicate independently with the liquid supply port and the liquid discharge port in each region of the partitioned space, the sheath, the bridge, and the bridge. And a means for connecting the scope in a detachable assembled state.

[0007]

DETAILED DESCRIPTION OF THE INVENTION An endoscope apparatus according to an embodiment of the present invention will be described with reference to the drawings. (Structure) The endoscope apparatus 1 comprises three units of a scope 2, a bridge 3 and a sheath 4, and these units 2, 3 and 4 are combined in the state shown in FIG. The scope 2 includes a scope body 5 and a scope insertion portion 6, the bridge 3 includes a bridge body 7 and a bridge insertion portion 8, and the sheath 4 includes a sheath body 9 and a pipe-shaped sheath insertion portion 10. The scope body 5 and the bridge body 7 are detachably connected to each other via a taper fitting portion 11 that fits in a liquid-tight manner by fitting the scope body 5 side into the bridge body 7 side. Further, the bridge body 7 and the sheath body 9 are also detachably connected to each other via a taper fitting portion 12 that fits in a liquid-tight manner by fitting the bridge body 7 side into the sheath body 9 side. That is, the sheath 4, the bridge 3, and the scope 2 are connected and fixed in a freely detachable state by connecting means.

Further, in each of the taper fitting portions 11 and 12, a notch groove 13 is formed in one member thereof in order to avoid fitting deviation around the axis thereof, and the notch groove 13 is formed in the other member.
A pin 14 that is engaged with the pin 14 is provided, and the pin 15 constitutes a positioning mechanism around the axis. Further, each taper fitting portion 11 and 12 is provided with a locking means 16 so that the fitting state can be fixed.
Each locking means 16 has a knob 18 which is screwed into a ring 17 fitted around the outer circumferences of the bridge body 7 and the sheath body 9 and is screwed to fasten the taper fitting portions 11 and 12. The ring 17 is rotatably held by the corresponding main bodies 7 and 9 by a stop pin (not shown).

The sheath 4 is formed with a conduit 21 that extends from the inside of the sheath insertion portion 10 to the sheath body 9. The conduit 21 communicates with an internal channel 22 having the same diameter inside the bridge body 7. are doing. That is, the conduit 21 and the internal channel 22 are coaxially and linearly arranged with substantially the same diameter.

A partition plate 23, which is a member that constitutes partition means, is located in the inner channel 22 of the bridge body 7 and is located substantially in the lower region thereof. The partition plate 23 constitutes the bridge insertion portion 8.
The partition plate 23 extends forward from the bridge body 7,
It extends into the duct 21 of the sheath 4 and reaches near the tip 10a of the sheath insertion portion 10. The partition plate 23 is liquid-tightly joined to the inner surface of the internal channel 22 in the bridge body 7, and is fixed by an attaching means such as a fixing screw. The material of the partition plate 23 may be, for example, a metal member such as stainless steel, an elastic member, a resin, or the like.

As shown in FIG. 2, the partition plate 23 has a substantially Y-shaped cross section, and a V-shaped long groove 25 is provided on the lower surface of the partition plate 23 by the ridges 24 on both side edges below the partition plate 23. The long groove 25 is provided in a range extending from the tip of the partition plate 23 to the vicinity of the tip of the bridge body 7, and the long groove 25 is not formed in the bridge body 7. The long groove 25 is positioned inside the sheath body 9 at a position that covers an internal opening 27 of a drainage port (drainage port) 26 provided in the sheath body 9.

As shown in FIG. 3, the drainage port 26 communicates with a base 28 protruding laterally of the bridge body 7, which is connected to a suction source S equipped with a suction pump, a suction bottle and the like. It has become. Further, a space 30 into which the scope insertion part 6 and a treatment tool are inserted is formed in a portion of the sheath 4 which is partitioned by the partition plate 23 substantially above the conduit 21. FIG.
As shown by, the internal channel 22 of the bridge body 7 is formed coaxially with the scope insertion space 30 of the sheath 4.

Further, the ridge portions 24 forming both side edge portions of the long groove 25 are in contact with the inner surface of the conduit 21 of the sheath 4 from the sheath body 9, and the ridge portions 24 on both edges of the sheath body 9 from the sheath body 9. The insertion portion 10 is in contact with the inner surface of the pipe 21 thereof, thereby forming a drainage passage communicating with the drain port 26. As shown in FIG. 2, the partition plate 23 is also provided with a ridge portion 29 extending over the entire length in the upper portion thereof, and the ridge portion 29 divides the space 30 into two or more space regions. There is.

On the other hand, on the upper portion of the sheath main body 9, there is provided a mouthpiece 32 forming a water feed opening (liquid feed opening) 31 communicating with the above-mentioned conduit 21, and the mouthpiece 32 is the water feed opening 3 thereof.
A valve 34 for opening and closing 1 is provided. The base 32 is connected to the perfusion liquid supply source W.

Further, one or more treatment instrument insertion port portions 19 are provided on both sides and an upper portion of the bridge body 7, and each treatment instrument insertion port portion 19 communicates with the above-mentioned internal channel 22. It forms the channel 36. The treatment instrument channel 36 communicates with the conduit 21 provided in the front sheath 4 through the internal channel 22. And
A treatment instrument such as forceps inserted from the treatment instrument channel 36 of the treatment instrument insertion port 19 is fed from the internal channel 22 to the conduit 21.
It can be led out into the body cavity through.

The liquid-sending space 30 has such a size that a treatment instrument, which will be described later, can pass therethrough, and is also used as a treatment instrument channel. The forceps channel 36 of the treatment instrument insertion port 19 provided on both sides and above the bridge 3 communicates with the internal channel 22 and further with the space 30 in the bridge body 7 as shown by the dotted line in FIG. To do. Each treatment instrument insertion port portion 19 is provided with a cock 37 for opening and closing the treatment instrument channel 36.

The scope insertion portion 6 of the scope 2 reaches the distal end 10a of the sheath insertion portion 10 through the internal channel 22 and the conduit 21 described above. As shown in a sectional view in FIG. 2, the scope insertion portion 6 includes an optical pipe 42 accommodating an observation optical system 41 and an illumination light glass fiber 43.
And two light guide pipes 44 respectively accommodating therein. The light guide pipe 44 has a cross-sectional shape that is not a perfect circle but is slightly crushed into a crescent shape, and the concave portion 45 of the crescent moon and a part of the outer peripheral surface of the optical pipe 42 that is aligned with the concave portion 45 are axially extended over the entire length. The optical pipe 42 and the light guide pipe 44 are integrated with each other in a state of being adhered or brought into close contact with each other by a fixing means such as soldering or welding. Then, the scope insertion portion 6 is arranged in the space 30 located substantially above the pipe line 21 partitioned by the partition plate 23. A scope insertion portion 21 is arranged substantially above the inside of the conduit 10.

Further, the scope body 5 is provided with a forceps port (treatment instrument insertion port) 47 and a forceps channel 48. The forceps channel 48 is provided at the tip of the scope body 5 via the internal channel 22 of the bridge 3. It communicates with the space 30. An eyepiece portion 49 is obliquely provided on the scope body 5.

FIG. 7 shows a distal end portion of an example of a treatment tool 60 used in combination with the endoscope apparatus 1. This is to fix a wire 63 along the outside of the main tube 61 from the vicinity of the tip of the main tube to a mouthpiece 62 provided at the tip of the main tube 61 made of an elastic body, and pull the wire 63 at the proximal side. Due to
The tip portion of the main tube 61 is curved. Inside the main tube 61, a channel 64 that is open at the tip of the main tube 61 is provided. Then, another treatment instrument 6 having elasticity such as a laser probe or an electrode is provided in the channel 64.
5 through which the main tube 61 is projected. By pulling the wire 63 with the treatment tool 65 in the channel 64, it is possible to change the direction of the distal end of the treatment tool 65 together with the main tube 61.

On the other hand, FIG. 8 shows an example of use when the present endoscope apparatus 1 is used in brain surgery. Scope 2 for lesions in the brain
The stereotactic brain surgery device 70 is used as a guide so that the tip of the patient can be accurately reached. The attachment of the scope 2 to the stereotactic brain surgery device 70 is performed at two positions, that is, a sheath fixing tool 71 for restricting the insertion direction of the scope 2 and an endoscope fixing tool 72 for supporting the weight of the scope 2. (See Figure 1). The sheath insertion portion 10 is inserted into the sheath fixing tool 71, and the bridge main body 7 is inserted into the endoscope fixing tool 72.
The bridge mounting portion 74 formed on the outer periphery of the is inserted. Here, in order to attach the bridge 3 even if the scope 2 is rotated, as shown in FIG. 5, the bridge attaching portion 74 is coaxial with the sheath inserting portion 10,
It is provided so as to be eccentric with respect to the bridge body 7. on the other hand,
As shown in FIG. 5, the entrance portion of the internal channel 22 of the bridge main body 7 is such that the internal channel 22 is located in the space 3 for inserting the scope of the sheath 4 with respect to the bridge mounting portion 74.
It is formed coaxially with 0.

(Operation and Effect) When the endoscope apparatus 1 is used, the three units of the scope 2, the bridge 3 and the sheath 4 can be combined in the state shown in FIG.
Then, a clean perfusate such as physiological saline from the water supply source W flows into the conduit 21 through the water supply mouthpiece 32 and the water supply port 31, and the space 30 above the conduit 21 is partitioned by the partition plate 23. Through the sheath insertion portion 10 to the distal end 10a and then out into the body cavity. On the other hand, excess liquid in the body cavity or liquid contaminated with blood or the like flows from the sheath tip 10a to the proximal side through the space (suction passage) in the long groove 25 surrounded by the duct 21 and the partition plate 23. Drainage port 26 in main body
And is discharged to the suction source S through the drainage base 28. In this way, the inside of the body cavity is observed while perfusing a clean liquid in order to secure the cavity area and wash away blood, smoke, and the like generated during treatment.

As described above, the partition plate 23 divides and forms two spaces, a space area for liquid supply and a space area for suction, in the pipe line 21. Has become. Since the partition plate 23 is a plate-shaped member having a Y-shaped cross section, it does not occupy a large space in the conduit 21 in the sheath 4, so that the space can be effectively utilized as a space for inserting a treatment tool. At the same time, it does not hinder the insertion of the treatment tool 60.

Further, when the bridge 3 and the sheath 4 are disassembled, the sheath insertion portion 10 has a simple cylindrical shape, while the bridge insertion portion 8 becomes a plate-shaped member having no closed space, so that the surface thereof is open to the outside. It is easy to clean and can be surely cleaned.

Further, by providing the ridge portion 29 on the partition plate 23, even when a soft treatment tool is used, the treatment tool does not bend in the space 20, and the treatment tool projects from the sheath tip 10a. The position can also be regulated, making it easier to take measures.
Even when two or more soft treatment tools or soft tubes are used, they do not intersect with each other in the duct 21 and the internal channel 22, so that the treatment tools and tubes are arranged at hand and projected from the sheath tip 10a. The arrangement of the treatment tools and tubes when doing the same will be the same, and their operability will be improved. Moreover, since the structure of each part is simple, it can be provided to the user at an extremely low cost.

As shown in FIG. 2, according to the cross-sectional shape of the scope insertion portion 6, a part of the peripheral portion of the light guide pipe 44 is crushed into a crescent shape, and the surface of the concave portion 45 and the outer periphery of the optical pipe 42. Since the surfaces are pressed against each other and integrated, the contact surface can be enlarged and stronger bonding, soldering or welding is possible. Further, the optical pipe 42 and the light guide pipe 44 can be easily positioned with respect to each other, and the assembling workability is also good. And, as the greatest merit, since the peripheral portion of the light guide pipe 44 is crushed into a crescent shape and wound around the optical pipe 42 to be integrated, the entire outer diameter of the scope insertion portion 6 can be reduced, and accordingly, The channel part through which the treatment tool is inserted can be enlarged.

On the other hand, since the treatment tool 60 shown in FIG. 7 has a simple structure, it has good durability and can have a smaller outer diameter. Although the partition plate 23 in the above-described embodiment has a substantially inverted Y-shaped cross section, the partition plate 23 may be formed in a substantially inverted U-shaped shape or the number of ridges may be increased. It is not limited to one. Further, the ridge portion may be brought into contact with either the inner surface of the sheath insertion portion or the scope insertion portion to partition the space inside the sheath insertion portion.

(Appendix) 1. A sheath having a pipe-shaped sheath insertion portion and provided with a liquid supply port and a liquid discharge port communicating with a space inside the sheath insertion part;
A scope that has a scope insertion portion that is inserted through a space inside the sheath insertion portion, and that observes the surgical field from the distal end of the sheath insertion portion; and a scope that is inserted into the sheath insertion portion along the insertion axis direction and that sheath insertion Partitioning the space in the sheath insertion portion into a plurality of regions between at least one surface of the pipe passage inner surface and the scope insertion portion outer surface,
A bridge having partitioning means for forming a liquid supply path and a liquid discharge path, which communicate independently with the liquid supply port and the liquid discharge port in each region of the partitioned space, and the sheath, the bridge, and the scope. An endoscope apparatus, comprising: a detachable fixing means capable of detachably attaching each.

2. In the additional item 1, the partition means has a substantially U-shaped or substantially Y-shaped cross section, and at least two or more of the ridges forming the edges of the cross section are in contact with the inner surface of the sheath insertion portion over substantially the entire length. An endoscope apparatus, which is a partition member.

3. In the first aspect, the partition means has a substantially U-shaped or Y-shaped cross section, and at least two or more of the ridges forming the edges of the cross section have a sheath insertion portion and a scope over substantially the entire length. An endoscopic device characterized by being in contact with any of the inner surfaces of an insertion portion.

4. In the appendix 1, the space portion forming the liquid supply path has a space of a size that allows at least one or more treatment tools to be inserted therethrough. 5. Item 1. The endoscope apparatus according to appendix 1, wherein the scope has at least one treatment instrument insertion port portion parallel to the central axis of the sheath insertion portion.

6. A sheath that has a liquid supply port, a liquid discharge port, and a sheath insertion portion, and is detachably connectable in front of the bridge,
An endoscope including a bridge having a partition plate that is inserted into the sheath insertion portion over substantially the entire length, and a scope that is detachably connected to the rear of the bridge and that observes the operative field from the distal end of the sheath insertion portion. In the device, the inside of the sheath insertion portion is provided with an independent liquid feed path and drainage path that communicate with the liquid feed port and the liquid drain port, respectively, by the partition plate and the scope insert portion, and one or more treatment tools. An endoscope device characterized by being divided into a space for insertion.

7. The sixth aspect is an endoscope apparatus in which the bridge has one or more treatment instrument insertion ports. 8. The sixth aspect is the endoscope device according to the sixth aspect, wherein the scope has one or more treatment tool insertion ports. 9. The sixth aspect of the present invention is the endoscope device according to the sixth aspect, wherein at least one treatment tool insertion port is parallel to the central axis of the sheath insertion portion. 10. In the appendix 6, the partition plate is detachable from the main body of the bridge.

11. A sheath having a liquid supply port, a drainage port, and a sheath insertion portion, and a sheath detachably connected to the rear of the sheath and inserted into the sheath insertion portion over substantially the entire length, and the operative field is observed from the distal end of the sheath insertion portion. In an endoscope apparatus including a scope, a partition that divides the insertion portion of the scope into a fluid feed path and a fluid drain path that are independent of each other and that communicate with the fluid feed opening and the fluid drain opening inside the sheath insertion portion. An endoscope apparatus comprising a member.

12. The endoscope device according to appendix 11, wherein the partition member is detachable from the scope insertion portion. 13. Item 11. The endoscope device according to appendix 11, wherein the liquid supply path divided by the partition member has a space into which at least one treatment tool can be inserted. 14． In Supplementary Note 11, the space is at least 1
An endoscope apparatus having at least three treatment tool insertion ports.

15. Item 14. The endoscope apparatus according to appendix 14, wherein at least one treatment instrument insertion port is parallel to the central axis of the sheath insertion portion. 16. In the additional item 11, the cross-sectional shape of the partition member is substantially U-shaped or substantially Y-shaped, and at least one of the ridges forming the edge of the partition member is in contact with the inner surface of the sheath insertion portion over substantially the entire length. Endoscopic device.

[0036]

As described above, according to the present invention, when the scope, the bridge and the sheath are combined, they are inserted into the space inside the sheath insertion portion along the insertion axis direction thereof,
In addition, since the space inside the sheath insertion portion is formed between the inner surface of the conduit of the sheath insertion portion and the means for partitioning the liquid supply passage, the drainage passage, and the treatment tool insertion channel, the space inside the sheath and the bridge insertion portion are formed. The structure can be simple, and the sheath insertion portion can be made smaller or the treatment tool to be used can be made larger in diameter. The bridge allows orderly arrangement of the treatment instrument and scope in the space inside the sheath insertion section. Further, since the elongated independent channel is not used, the space inside the sheath insertion portion and the bridge insertion portion can be easily washed by disassembling the sheath and the bridge.

[Brief description of drawings]

FIG. 1 is a sectional view of an assembled state of an endoscope apparatus according to an embodiment of the present invention.

FIG. 2 is an enlarged transverse cross-sectional view of the position portion of the sheath body of the endoscope device.

FIG. 3 is a transverse cross-sectional view of a portion of the sheath body of the endoscope device of the same.

FIG. 4 is a side view of the sheath of the endoscope device.

FIG. 5 is a rear view of the bridge of the endoscope apparatus.

6 is a cross-sectional view taken along the line AA ′ in FIG.

FIG. 7 is a vertical cross-sectional view of a treatment tool that is also used in the endoscope apparatus.

FIG. 8 is a perspective view of the use state of the endoscope apparatus.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Endoscope device, 2 ... Scope, 3 ... Bridge, 4 ... Sheath, 5 ... Scope body, 6 ... Scope insertion part, 7 ... Bridge body, 8 ... Bridge insertion part, 9 ... Sheath body, 1
0 ... Sheath insertion part, 11, 12 ... Tapered fitting part, 16 ...
Locking means, 21 ... Pipe line, 22 ... Internal channel, 23
... partition plate, 24 ... ridge, 25 ... long groove, 26 ... drainage port, 2
9 ... Ridge part, 30 ... Space, 31 ... Water supply port, 36 ... Treatment tool channel, 41 ... Observation optical system, 42 ... Optical pipe, 4
3 ... Illumination glass fiber, 44 ... Light guide pipe, 60 ... Treatment tool, S ... Suction source, W ... Perfusion solution sending source.

Claims (1)

[Claims] 1. A sheath having a pipe-shaped sheath insertion portion and having a liquid supply port and a drainage port communicating with a space inside the sheath insertion portion, and a scope insertion portion inserted through the space inside the sheath insertion portion. A scope for observing the surgical field from the distal end of the sheath insertion portion, and at least the inner surface of the conduit of the sheath insertion portion and the outer surface of the scope insertion portion that are inserted into the sheath insertion portion along the insertion axis direction. A space inside the sheath insertion portion is partitioned into a plurality of areas between the surface and the one surface, and a liquid supply passage and a liquid discharge that are independently communicated with the liquid supply port and the liquid discharge port in each region of the partitioned space. An endoscope apparatus comprising: a bridge having partitioning means for forming a passage; and means for connecting the sheath, the bridge, and the scope in a detachably assembled state.