JPH01153132A - Insert auxiliary jig for endoscope - Google Patents

Abstract

PURPOSE:To prevent the swing and vibration of the leading end of an endoscope by arranging a plurality of inner diameter displacing materials, which are pressed in connection with the sliding of an outer diameter displacing member to be displaced in an inner diameter direction, to the inner periphery of the leading end of a guide tube. CONSTITUTION:An insertion auxiliary jig 1 consists of a flexible guide tube 4 provided with a hollow part so as to be capable of inserting the insert part 3 of the endoscope 2 and the operating part 5 provided on the manipulating side so as to connect with the tube 4. Observation, diagnosis and treatment are performed in such a state that the guide tube 4 having the insert part 3 of the endoscope 2 inserted therethrough is inserted into the subject, with the slide ring 12 provided on the fixing pipe part 8 of the leading end of the guide tube 4 sliding toward the base part in the axial direction by drawing and operating a wire 13 by the operating part 5 and a plurality of outer diameter displacing members 11 are bent in an outer diameter direction to be magnified and displaced. Further, the inner diameter displacing member 16 positioned at the inner periphery of the slide ring 12 is bent and displaced in an inner diameter direction by a cam 17 with the sliding of the slide ring 12 and grasps the outer periphery of the endoscope insert part 3 through which the pressure contact part 18 of the inner periphery of the inner diameter member 16 is inserted to fix the leading end thereof in the leading end of the guide tube 4. Therefore, the swing and vibration of the leading end of the endoscope can be prevented.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention covers ! The present invention relates to an insertion aid for an endoscope that allows the insertion part of the mirror to be fixed to a target observation site.

[Problems to be solved by conventional techniques and inventions] In recent years,
Insert the elongated insertion section into body cavities or various devices.

2. Description of the Related Art Medical and industrial endoscopes are widely used, which can be inserted into the pipes of plants, etc., to observe and inspect the insides of these body cavities, equipment, and pipes, and perform treatments. The insertion portions of these endoscopes (in the case of flexible endoscopes) are flexible so that they can be inserted into curved insertion paths.
Due to this flexibility, the orientation of the distal end side relative to the proximal side is not fixed, and it may be difficult to introduce the tip in the target direction.

For this reason, for example, in British Patent No. 2,154.335, a hollow shaft through which an endoscope can be inserted is provided, and the distal end side of the shaft is curved so that the distal end opening can be directed in a predetermined direction. an endoscope having a bending operation section for operating the bending section on the base side of the shaft, and an operation section main body provided with an insertion/extraction port for inserting and removing an insertion section of the endoscope. Insertion aids have been proposed. On the other hand, an endoscope is used to observe the object, such as the inside of a lumen.

When photographing, particularly when obtaining an image of a stationary subject, or when performing treatment, it is necessary to fix the distal end of the insertion section of the endoscope to the internal wall of the subject.

To deal with this, for example, a device was proposed in Japanese Utility Model Application No. 146343/1983, in which a flexible guide tube through which the insertion section of an endoscope can be inserted has a balloon that can be expanded and contracted around the outer periphery of the distal end. ing. However, in these prior related technologies, fluid is supplied into the balloon of the guide tube to inflate the balloon in order to fix the tip of the endoscope insertion part to the internal wall of the subject, but the balloon is inflated until completion of inflation. Problems remain, such as it takes time to complete the process, making it impossible to work efficiently, and requiring large-scale equipment for airtightness of the balloon, fluid supply and discharge, etc. Furthermore, in the prior art, since there is no means for fixing the distal end of the endoscope insertion section within the distal end of the guide tube, even if the distal end of the guide tube is fixed to the internal wall of the subject, The distal end of the endoscope insertion section that is inserted through the endoscope may swing or vibrate. However, in order to prevent the distal end of the endoscope insertion part from swinging or vibrating, it is possible to completely fix the guide tube and the endoscope, but this would prevent the endoscope from moving into the id. The degree of freedom with the tube is lost,
When the guide tube is inserted into the subject, the endoscope cannot be inserted into or removed from the guide tube.

The present invention has been made in view of these circumstances, and allows the distal end of the guide tube to be quickly fixed and released from the inner wall of the subject without using an intrusive device.
Furthermore, when the guide tube distal end is fixed to the internal wall of the subject, the distal end of the endoscope insertion section can be fixed within the guide tube distal end, preventing rocking and vibration of the endoscope distal end, and providing a stable mounting. It is an object of the present invention to provide an insertion aid for an endoscope that can obtain still images of a specimen or easily perform various treatments.

[Means for Solving the Problems and Their Effects] In order to achieve the above object, the endoscope insertion aid according to the present invention slides relatively in the axial direction of the guide tube by operating the proximal operation section. A plurality of outer diameter displacement members that expand and displace in the outer diameter direction are disposed on the outer periphery of the distal end of the guide tube of the endoscope insertion section, and are moved in the inner diameter direction by being pressed in conjunction with the slide of the outer diameter displacement members. A plurality of inner diameter displacement members are arranged on the inner periphery of the distal end of the guide tube.

With this configuration, when the outer diameter displacement member is slid by operating the hand side operation part, the outer diameter displacement member expands in the outer diameter direction and comes into contact with the inner wall of the subject, and the tip of the guide tube is moved against the inner wall of the subject. It can be fixed at the required location.

On the other hand, when the outer diameter displacement member slides to expand and displace, the plurality of inner diameter displacement members are pressed in conjunction with this slide and are displaced in the inner diameter direction, and come into contact with the outer periphery of the endoscope insertion portion inserted, The distal end portion of the endoscope insertion portion can be fixed.

[Example] Hereinafter, the present invention will be described in detail with reference to the drawings.

Figures 1 to 7 show the first part of the insertion aid for an endoscope according to the present invention.
Regarding the example, FIG. 1(A) is a cross-sectional view taken along the line Δ-Ata in FIG. 2, FIG.
The figure is a perspective view showing the tip of the insertion aid, FIG. 3 is a sectional view taken along line C-C in FIG. 2, FIG. 4 is a side view showing the entire insertion aid, and FIG. 5 is the outer diameter displacement member. FIG. 6 is a perspective view of the tip of the insertion aid showing the operation of sliding the
A sectional view taken along line D and FIG. 7 are sectional views showing an operating state in which the insertion aid is fixed to the inner wall of the subject.

As shown in FIG. 4, the endoscope insertion aid 1 of this embodiment is a flexible guide tube 4 that is elongated and has a hollow section so that the insertion section 3 of an endoscope 2 can be inserted therethrough. and a large operating section 5 connected to the proximal side of the guide tube 4, with a guide tube insertion port 5 at the base end of the operating section 5.
It forms a. A curved portion 6 in which a number of joint pieces (not shown) are vertically supported is connected to the tip side of the guide tube main body 4a of the guide tube 4. One end of the wire inserted through is fixed, and the other end of the wire is connected to the wire pulling/relaxing mechanism in the operating section 5 to pull the wire.

By rotating the curved operation knob 7 provided on the outer surface of the operation part 5, which is the operation body of the relaxation mechanism, the wire is pulled.
When relaxed, the curved portion 6 can curve in the vertical/horizontal direction or return to a straight line.

Further, in front of the curved portion 6, a fixed tube portion 8 is continuously provided. This fixed tube section 8 has a first flexible tube 9 and a second flexible tube 10 which are connected from the front side, and this first flexible tube 9
An outer diameter displacement member 11 is disposed in the outer circumferential axis direction of the second flexible member 10. Note that the first flexible tube 9 and the second flexible tube 10 may not be separate members, but may be integrally molded as a single member. The outer diameter displacement member 11 is made of a plurality of elastic band-shaped members, and the base portion of the outer diameter displacement member 11 is fixed to the second flexible tube 10, while the tip portion is attached to the outer periphery of the first flexible tube 9. It is fixed to a slide ring 12 which is externally slidable in the axial direction, and when the slide ring 12 is slid toward the base side, it is bent and expanded in the outer radial direction, and when it is slid toward the tip side, it is returned to its original position. ing. One end of a wire 13 for sliding the slide ring 12 is fixed to this slide ring 12, and this wire 13 is attached to the slide tube 12.
The wire is inserted into the second flexible tube 10 near the end of the sliding range, passes through the bending section 6 or inside the flexible tube main body 4a, reaches the operating section 5, and exits from the wire insertion opening section 14 provided in the operating section 5. It is extended, and at this part of the operation part 5,
The slide ring 12 is configured to be able to slide back and forth in the axial direction by relaxing (or pressing). Said second flexible tube 10. Curved portion 6° flexible tube body 4a, operating portion 5 to wire insertion port 1
4, a wire tube 15 is inserted and disposed, and the wire 13
is inserted into this wire tube 15.

In the illustrated example, the wire 13 is shown as protruding from the wire insertion port 14 of the operating section 5;
The traction and relaxation of 3 is also configured to be operated by a knob provided on the operating section 5 in the same manner as the wire operating mechanism for bending the bending section.

On the other hand, the outer periphery of the first flexible tube 9 and the slide ring 12
A plurality of inner diameter displacement members 16 are formed in the axial direction within the sliding range by slotted grooves and are capable of being bent in the radial direction.

These inner diameter displacement members 16 have a cam 17 formed on their outer periphery that is pressed in the inner radial direction by the slide of the slide ring 12, and the outer periphery of the endoscope insertion portion 3 inserted through the inner diameter displacement member 16 is bent in the inner radial direction. Pressure contact portion 18 that is pressed against and held between
is formed protrudingly.

In such a configuration, when the guide tube 4 inserted through the insertion section 3 of the endoscope 2 is inserted into a subject, for example, a lumen, and the observation 1 diagnosis or treatment is performed, the tip end 3 of the endoscope 2 is inserted. It may be necessary to fix it, photograph it, or treat it. In this case,
By pulling the wire 13 using the hand-side operating section 5, the slide ring 12 provided on the fixed tube section 8 at the distal end of the guide tube 4 slides toward the base in the axial direction, and as shown in FIG. The radial displacement member 11 is bent and expanded in the outer diameter direction, and the inner diameter displacement member 16 located on the inner periphery of the slide ring 12 is deflected and displaced in the inner radial direction by the cam 17 due to the sliding of the slide ring 12. Inner diameter displacement member 1
6. The pressure contact part 18 on the inner periphery clamps the outer periphery of the inserted endoscope insertion part 3 and fixes the distal end of the endoscope insertion part 3 within the distal end of the guide tube 4 (fixed tube part 8). In addition, since the outer diameter displacement member 11 is bent and expanded in the outer diameter direction as described above, the fixed tube portion 8 at the tip of the guide tube 4 is expanded and displaced as shown in FIG. The radial displacement member 11 can, for example, come into contact with the inner wall P of the lumen to fix the fixed tube portion 8 at a substantially central position in the axial direction of the lumen. In this state, the distal end of the endoscope insertion section 3 is fixed to the fixed tube section 8 at the distal end of the guide tube 4, so it does not shake during imaging or allows various treatments to be performed easily and accurately. Is possible.

Enlarged displacement of the outer diameter displacement member 11 and inner diameter displacement member 1
In order to release the inner diameter displacement of the ring 6 and return it to its original state, the wire 13 may be relaxed (or suppressed) using the proximal operation section 5 and the slide ring 12 may be slid back toward the distal end side. As a result, the distal end of the guide tube 4 is released from the fixed tube section 8 [for example, the inner wall P of the lumen], and the distal end of the endoscope insertion section 3 is released from the fixed tube section 8, allowing each to move freely. .

In this embodiment, the inner diameter displacement member 16 is formed by notching the first flexible tube 9, but it is also possible to form a notch hole in the first flexible tube 9 and arranging the inner diameter displacement member as a separate member. may be set. In addition, the width and elastic modulus or length of the outer diameter displacement member 11,
By changing the thickness, the hardness during expansion and contraction and the rate of expansion displacement can be set.

FIG. 8 shows the guide tube 4 by varying the expansion displacement ratio of the outer diameter displacement member 11 as described above.
This is a modification example in which the relative position of the distal end portion (fixed tube portion 8) with respect to, for example, the lumen inner wall P is deviated from the axial center.

9 to 11 relate to a second embodiment of the present invention, in which FIG. 9 is a sectional view showing the tip of the insertion aid, FIG. 10 is a view taken in the direction of arrow E in FIG. 9, and FIG. 9 is a sectional view showing the operating state of FIG. 9. FIG.

In this embodiment, the slide ring used in the first embodiment is omitted, and one end of the wire 13 is fixed directly to the middle of the outer diameter displacement member 21. This outer diameter displacement member 21 has its base side fixed to the second flexible tube, while its tip is open, and an abutment portion 22 is bent and formed at the tip. Moreover, this outer diameter deviation member 2
1 has a slit 23 formed in the axial direction of the first flexible tube 9 with a midway bent part 24 in the inner diameter direction, and this bent part 24
One end of the wire 13 is fixed to the front rising portion. The outer diameter displacement member 21 has its distal end side opened in the outer diameter direction and is expanded and displaced, while the midway bent portion 24 is displaced in the inner diameter direction as an inner diameter displacement member and is inserted into the distal end portion of the endoscope insertion portion 3. It is designed to press and hold.

Other configurations and operations are the same as in the first embodiment. still,
According to this embodiment, in addition to eliminating the need for a slide ring, the outer diameter displacement member and the inner diameter displacement member can be formed from one member, and the expansion displacement of the outer diameter displacement member can be set to a large extent.

12 to 16 relate to the third embodiment of the present invention, FIG. 12 is a perspective view of the distal end of the insertion aid, and FIG. 13 is a perspective view of the tip of the insertion aid.
The figure is a perspective view of the tip of the insertion aid with the outer diameter expansion displacement member removed, Figure 14 is a perspective view of the tip of the insertion aid in operation, and Figure 15 is a cross section showing the inner diameter displacement member. 16 is a sectional view showing the operating state of FIG. 15.

In this embodiment, a mantle tube 30 is formed from the fixed tube part 8 at the distal end of the guide tube 4 to the rear thereof, and a spiral (illustrated example) or axial slot groove 32 is formed in the mantle tube 30 (
If it is formed in the axial direction, the slotted groove 32 is
The portion formed by this is defined as an outer diameter displacement member 31. This outer diameter displacement member 31 portion and the tip portion 33 are slidable in the axial direction, and the wire 13 is attached to the tip portion 33.
By pulling the wire 13, it slides in the axial direction, and as shown in FIG. 14, it bends and expands in the outer diameter direction. Further, a plurality of cams 34 shown in FIG. 16 are formed on the inner circumference of the distal end portion 33, and a plurality of cams 34 shown in FIG.
A plurality of cam grooves 35 are formed along the trajectory of the cam 34 when it slides, and the cam 34 is engaged therein. An inner diameter displacement member 36 similar to that of the first embodiment is formed at the end portion of this cam groove 35, and a pressure contact portion 37 is formed on the inner periphery of this inner diameter displacement member 36.

As shown in FIG. 14, when the tip 33 and the outer diameter displacement member 31 are slid and displaced by pulling the wire 13, the cam 34 on the inner wall of the tip 33 reaches the end of the cam groove 35, as shown in FIG. The inner diameter displacement member 36 is pressed and displaced in the inner diameter direction, and the distal end portion of the endoscope insertion portion 3 inserted therethrough is clamped and fixed by the pressure contact portion 37.

Note that the other configurations and operations are almost the same as those of the first embodiment.

Furthermore, in the present invention, a wire is used as the slide operating member for sliding the outer diameter displacement member, but instead of the wire, a shape memory alloy or the like is disposed on the tip side, and the shape memory alloy or the like is used to slide the outer diameter displacement member. It is also configured to allow

[Effects of the Invention] As explained above, according to the present invention, the distal end of the guide tube can be quickly fixed and released from the inner wall of the subject without using a complicated device, and the guide tube When fixing the distal end to the internal wall of the subject, the distal end of the endoscope insertion section can be fixed within the guide tube distal end, which has the effect of preventing rocking and vibration of the endoscope distal end.

[Brief explanation of the drawing]

Figures 1 to 7 show the first part of the insertion aid for an endoscope according to the present invention.
Regarding the embodiment, FIG. 1 (A> is a cross-sectional view taken along line A-A in FIG. 2, FIG. 1 (B) is a cross-sectional view taken along line B-B in FIG. 2, and FIG. 2 is a tip of the insertion aid. FIG. 3 is a perspective view showing the section C- in FIG. 2.
A cross-sectional view taken along line C; FIG. 4 is a side view showing the entire insertion aid;
Fig. 5 is a perspective view of the tip of the insertion aid showing the operation of sliding the outer diameter displacement member, Fig. 6 is a sectional view taken along the line D-D in Fig. 5, and Fig. 7 shows the insertion aid being inserted into the subject. 8 is a sectional view showing a modified example of the first embodiment in an operating state; FIGS. 9 to 11 relate to a second embodiment of the present invention; The figure is a sectional view showing the tip of the insertion aid, FIG. 10 is a view taken in the E direction of FIG. 9, FIG. 11 is a sectional view showing the operating state of FIG. 9, and FIGS. 12 to 16 are Regarding the third embodiment of the present invention, FIG. 12 is a perspective view showing the tip of the insertion aid, FIG. 13 is a perspective view of the tip of the insertion aid with the outer diameter expansion displacement member removed, and FIG. FIG. 14 is a perspective view of the distal end of the insertion aid showing the operating state, FIG. 15 is a sectional view showing the inner diameter displacement member, and FIG. 16 is a sectional view showing the operating state of FIG. 15. 4...Guide tube 5...Operation section 8...Fixed tube part 11.21.31...Outer diameter displacement member 13...Wire 16.24.36...Inner diameter displacement member Fig. 3 ■ ■ Figure 4 Figure 5 Figure 7 Figure 8 Figure 12 Figure 14 Figure 15 Figure 16

Claims (1)

[Claims] On the outer periphery of the tip of the guide tube into which the insertion section of the endoscope can be inserted and removed, there are a plurality of outer diameter displacement members that can be expanded and displaced in the outer diameter direction by relatively sliding in the axial direction of the guide tube by operating the hand side operation section. In addition, a plurality of inner diameter displacement members are disposed on the inner periphery of the distal end of the guide tube, the inner diameter displacement members being pressed and displaced in the inner diameter direction in conjunction with the slide of the outer diameter displacement member. Ingredients.