JP2005046274A - Endoscope insertion aid - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an endoscope insertion aid effectively securing a space in a body cavity when inserting an endoscope or the like using overtubes or the like. <P>SOLUTION: This endoscope insertion aid is provided with an inside overtube 1B for inserting the endoscope 20 therein and capable of assuming a shape-variable first state and a shape-fixed second state; and an outside overtube 1A for inserting the inside over tube 1B in the inside and capable of assuming the first state and the second state. The overtubes 1A and 1B are inserted in the body cavity and fixed in the curved state so as to secure the space relative to the body cavity. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an endoscope insertion aid, and more particularly to an endoscope insertion aid used when inserting an endoscope or the like.
[0002]
[Prior art]
When an endoscope is inserted into a body cavity, a force acting on the body cavity due to the pressure of an organ or the like acts, and it may be difficult to insert the endoscope alone. A so-called endoscope overtube (hereinafter referred to as an overtube as appropriate) is widely used in such a case. By inserting the overtube into the body cavity together with the endoscope, for example, there is an advantage that the insertion path of the endoscope into the body cavity is secured, and the subsequent insertion / extraction of the endoscope becomes easy.
[0003]
In an endoscope system using such an overtube, a flexible adjustment mechanism for adjusting the hardness of the overtube is provided in the overtube, and depending on the hardness of the organ into which the overtube is inserted, For example, Japanese Patent Application Laid-Open No. 2002-369971 discloses a technique for reducing the pain of a patient during insertion by changing the hardness of an overtube.
[0004]
[Patent Document 1]
JP 2002-369971 A
[0005]
[Problems to be solved by the invention]
When an overtube as described above is inserted into a hollow organ, for example, when performing an observation with an endoscope or a treatment with a treatment instrument through the overtube, the portion where the overtube is inserted is endoscopically viewed. The mirror can be easily inserted, but because the site to be observed and treated is the tip extended from the overtube, the lumen narrows due to the pressure of the internal organs as described above, It may be difficult to perform observation and treatment comfortably.
[0006]
The present invention has been made in view of the above circumstances, and provides an endoscope insertion aid that can effectively secure a body cavity space when an endoscope or the like is inserted using an overtube or the like. The purpose is to do.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the endoscope insertion aid according to the first invention is capable of inserting the endoscope into the inside, and maintains the first state and the shape which are flexible and variable in shape. A first tubular member that can be fixed in the second state, and for inserting the first tubular member into the inside, and taking the first state and the second state. A second tubular member to be obtained, wherein at least one of the first tubular member and the second tubular member is inserted into a body cavity and curved so as to have the second state. By taking it, it fulfills the function of securing a space in the body cavity.
[0008]
An endoscope insertion aid according to the second invention is the endoscope insertion aid according to the first invention, wherein at least one of the first tubular member and the second tubular member. However, by taking the second state in a state of being inserted into the body cavity and being bent, the position of the body cavity is further fixed.
[0009]
Furthermore, the endoscope insertion aid according to the third invention includes an insertion hole through which the endoscope can be inserted and a balloon can be inserted therein, and a plurality of ducts arranged around the insertion hole. And a first state that is flexible and variable in shape, and a second state that is fixed while maintaining the shape. A rod-shaped member, and the rod-shaped member is inserted and extended through a pipe line of the tubular member, and the balloon is inserted and extended through an insertion hole of the tubular member, The balloon is inflated, and then the rod-like member assumes the second state, thereby fulfilling the function of securing a space in the body cavity.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
1 to 6 show a first embodiment of the present invention. FIG. 1 is a cross-sectional view and a perspective view showing a configuration of an overtube, and FIG. 2 is a side view showing an overtube having a different length and diameter. 3 is a perspective view showing a distal end side of a configuration in which a plurality of overtubes having different lengths and diameters and an endoscope are combined, and FIG. 4 is a partial cross-section showing a state in which the outer overtube is curved. FIG. 5 is a perspective view including a partial cross section showing a state in which the outer and inner overtubes are curved, and FIG. 6 is a diagram showing a state in which the outer and inner overtubes and the endoscope are curved. It is a perspective view containing a partial cross section.
[0011]
As shown in FIGS. 1 (A) and 1 (B), an overtube 1 that is a tubular member includes a flexible tube portion 3 whose main portion is an insertion portion, and the flexible tube portion 3. It is roughly divided into an operation unit 2 provided on the hand side.
[0012]
The flexible tube portion 3 includes a friction member 8 sandwiched between a cylindrical inner sheath 6 and a cylindrical outer sheath 7 having an inner peripheral surface larger in diameter than the outer peripheral surface of the inner sheath 6. It consists of
[0013]
The inner sheath 6 is formed of, for example, a soft resin, and an inner side thereof is an endoscope insertion hole 13 for inserting an insertion portion of the endoscope.
[0014]
Similarly, the outer sheath 7 is formed of a soft resin, for example, and has a friction surface that generates a frictional force when its inner peripheral surface comes into contact with the outer peripheral side of the friction member 8.
[0015]
The friction member 8 is formed in a substantially tubular shape by winding an elongated plate-like member in a spiral shape, and its outer peripheral side comes into contact with the inner peripheral surface of the outer sheath 7 to cause friction. It is a friction surface for generating force. The friction member 8 is fixed to the inner peripheral side of the inner sheath 6 by a fixing portion 11 at the distal end in the insertion direction.
[0016]
Next, the operation unit 2 includes an inner sheath fixing member 12 that fixes the proximal end portion of the inner sheath 6 and an outer sheath fixing member 10 that fixes the proximal end portion of the outer sheath 7. In the moving groove 5 between, the transmission member 9 for fixing the proximal side of the friction member 8 and the operation lever 4 fixed to the transmission member 9 are arranged in the circumferential direction (or in the circumferential direction and axial direction as necessary). It is supported and configured to be rotatable. Further, on the inner peripheral side of the inner sheath fixing member 12, when the endoscope is inserted into the endoscope insertion hole 13, a space between the endoscope and the endoscope insertion hole 13 is provided on the proximal side. An airtight valve 14 having an inner peripheral flange shape is firmly fixed to keep the outer space of the airtight.
[0017]
The action of curving the shape of the overtube 1 having such a configuration and then fixing it is as follows.
[0018]
First, the insertion portion of the endoscope is inserted into the endoscope insertion hole 13 of the overtube 1, and the insertion portion of the endoscope is changed to a desired shape. Then, the flexible tube portion 3 is passively bent in accordance with the shape change of the insertion portion of the endoscope.
[0019]
In this state, when the operation lever 4 is rotated in a direction to unwind the friction member 8, the friction member 8 which is wound to form a substantially tubular shape expands in the radial direction. When the outer peripheral side of the friction member 8 and the inner peripheral surface of the outer sheath 7 are in surface contact, the frictional force as described above can be applied between them. Even if the shape of the overtube 1 is changed in this state, the curved shape of the flexible tube portion 3 is fixed because the frictional force acts against the force.
[0020]
On the other hand, in order to return the fixed flexible tube portion 3 to a state in which the shape can be changed again, the operation lever 4 may be rotated in a direction in which the winding of the friction member 8 is tightened. Thereby, when the friction member 8 is contracted in the radial direction and the surface contact between the friction member 8 and the outer sheath 7 is released, the shape change of the flexible tube portion 3 is allowed.
[0021]
In this first embodiment, a plurality of such overtubes are used to constitute an endoscope insertion aid that secures a body cavity space when an endoscope or the like is inserted.
[0022]
That is, the two types of overtubes shown in FIG. 2 are basically configured as described with reference to FIG. However, the overtube 1B shown in FIG. 2 (B) has an outer diameter of the flexible tube portion 3 smaller than that of the overtube 1A shown in FIG. 2 (A), and the endoscope insertion hole of the overtube 1A. The diameter is such that it can be inserted into 13. Furthermore, the length of the overtube 1B in the insertion direction of the flexible tube portion 3 is longer than the length of the entire overtube 1A in the insertion direction. At this time, it is desirable that the difference in length between the flexible tube portion 3 of the overtube 1B and the entire overtube 1A can be at least as large as the length of the curved portion of the endoscope 20 described later.
[0023]
Accordingly, when the flexible tube portion 3 of the overtube 1B is inserted into the endoscope insertion hole 13 of the overtube 1A, as shown in FIG. 3, the distal end portion of the flexible tube portion 3 of the overtube 1B However, it extends from the front-end | tip part of the flexible tube part 3 of 1 A of overtubes. The endoscope 20 is inserted into the endoscope insertion hole 13 of the overtube 1B in the double overtubes 1A and 1B.
[0024]
Next, with reference to FIG. 4 to FIG. 6, an operation for securing a space in the lumen using such a double overtube will be described.
[0025]
The overtube 1B is inserted into the overtube 1A, and the tip position of the overtube 1A and the tip position of the overtube 1B are substantially matched. Furthermore, in a state where the endoscope is inserted to the distal end portion in the overtube 1B, the overtube 1A and the overtube 1B are softened to be variable in shape.
[0026]
In this state, while observing with the endoscope 20, the overtube 1A, the overtube 1B, and the endoscope are integrally inserted into the lumen organ 24.
[0027]
When the insertion is performed up to the vicinity of the target portion, as shown in FIG. 4, when the bending portion of the endoscope 20 is bent, the double overtubes 1A and 1B are passively bent accordingly.
[0028]
In this state, the outer overtube 1A is fixed. On the other hand, at this time, the inner overtube 1B remains in a flexible state with a variable shape.
[0029]
Next, when the inner overtube 1B and the endoscope 20 are extended with respect to the outer overtube 1A and extended by an appropriate amount, as shown in FIG. Curve the part. Thereby, the inner overtube 1B is also passively curved.
[0030]
In this state, the inner overtube 1B is also fixed. That is, at this time, both the outer overtube 1A and the inner overtube 1B are fixed. In this state, the duct of the luminal organ 24 is widened by the action of both the bending of the overtube 1A and the bending of the overtube 1B, and when the treatment is performed later using the endoscope 20. Space has already been secured.
[0031]
In this state, the endoscope 20 is further extended to both the overtubes 1A and 1B, and observation is performed while the bending portion of the endoscope 20 is curved as desired, or the treatment tool 21 is used. Take action.
[0032]
In the above description, the overtube is used in a double manner. However, the present invention is not limited to this, and triple, quadruple, or more can be stacked.
[0033]
According to the first embodiment as described above, by using a plurality of overtubes in a stacked manner, it is possible to obtain a curve having a higher degree of freedom than when a single overtube is used. By utilizing such a curvature, a space in the subject can be secured, so that observation with an endoscope or treatment with a treatment tool or the like can be performed efficiently with high workability. Further, in a state where the luminal organ or the like is expanded by the overtube, the overtube is fixed to the luminal organ, so that the observation and treatment can be performed more stably. Furthermore, since the airtight valve is provided, air can be supplied through a gap between the endoscope insertion hole of the overtube and the endoscope. In addition, even when air is supplied through the endoscope channel, the airtightness in the body cavity can be maintained.
[0034]
FIGS. 7 to 11 show a second embodiment of the present invention, FIG. 7 is a perspective view showing a multi-lumen tube and a rod, and FIG. 8 is a diagram showing only the endoscope inserted through the multi-lumen tube. FIG. 9 is a perspective view including a partial cross-section showing a state in which a balloon and a plurality of rods are inserted into a multi-lumen tube, and FIG. FIG. 11 is a perspective view including a partial cross section showing a state in which the rod is fixed and the endoscope is inserted and treated instead of the balloon while the shape of the rod is fixed. FIG.
[0035]
In the second embodiment, the same parts as those in the first embodiment described above are denoted by the same reference numerals, description thereof is omitted, and only different points will be mainly described.
[0036]
The second embodiment constitutes an endoscope insertion assisting device that secures a space in a body cavity when an endoscope or the like is inserted by using a multi-lumen tube, a plurality of rods, and a balloon. It is a thing.
[0037]
FIG. 7A shows a multi-lumen tube 1C configured using the overtube structure as shown in FIG. The multi-lumen tube 1 </ b> C is provided with a plurality of rod lumens 18 as pipe lines around the endoscope insertion hole 13.
[0038]
A rod 1D as a rod-shaped member as shown in FIG. 7B can be inserted into the rod lumen 18 of the multi-lumen tube 1C. This rod 1D is basically configured so that it can be fixed and softened in the same manner as the overtube as shown in FIG. 1, and is different in that it is reduced in diameter. ing.
[0039]
Such a multi-lumen tube 1C is shown in the first embodiment by inserting the endoscope 20 through the endoscope insertion hole 13 and fixing it as necessary, as shown in FIG. It can use similarly to such an overtube.
[0040]
The multi-lumen tube 1C can be used as shown in FIGS. 9 to 11 by combining with the rod 1D.
[0041]
First, the multi-lumen tube 1C is inserted to the vicinity of the target site in the luminal organ 24 as shown in FIG. 8 together with the endoscope 20, and then fixed as necessary.
[0042]
Next, as shown in FIG. 9, the rods 1D are inserted into the rod lumens 18 of the multi-lumen tube 1C (four in the illustrated example) to extend a predetermined length, and the endoscope insertion holes 13 are inserted. Similarly, the balloon 26 is inserted and extended by a predetermined length. At this time, the rod 1D is in a variable shape state.
[0043]
Then, by sending air, the balloon 26 is inflated as shown in FIG. As a result, the rod 1D is bent along the peripheral shape of the balloon 26, and the luminal organ 24 is expanded.
[0044]
In this state, after fixing all the rods 1D, the balloon 26 is removed from the multi-lumen tube 1C after the balloon 26 is evacuated. Even at this time, the space in the luminal organ 24 is secured by the fixed rod 1D.
[0045]
Then, instead of the balloon 26, the endoscope 20 is inserted into the endoscope insertion hole 13, and the bending portion of the endoscope 20 is bent into a desired shape, and the observation is performed in the secured space. And the treatment with the treatment tool 21 can be performed with good operability.
[0046]
In the above description, the rod 1D is described as a tubular member similar to the overtube as shown in FIG. 1, but the rod 1D does not need to be inserted through an endoscope or the like. You may make it the structure which abbreviate | omitted the pipe line.
[0047]
In the above description, the multi-lumen tube 1C is of a type that can perform both variable shape and fixed shape similar to those of the overtube as shown in FIG. Even in a normal multi-lumen tube 1C that cannot be used, it is possible to secure the space in the body cavity by inserting the rod 1D as described above.
[0048]
According to such 2nd Embodiment, while there exists an effect substantially the same as 1st Embodiment mentioned above, by using the rod which can be shape-changed and shape-fixed with a multi-lumen tube, and a balloon, It is possible to secure a space in the luminal organ and perform observation and treatment with good workability. Further, in a state in which the inside of the lumen is pushed and expanded by the rod, the position of the endoscope is determined via the multi-lumen tube, so that observation and treatment can be performed more stably. The multi-lumen tube can be configured to be variable in shape and fixable, and the insertion of an endoscope or the like can be improved in the multi-lumen tube.
[0049]
FIGS. 12 to 15 show a third embodiment of the present invention, and FIG. 12 is a side view showing a state in which a plurality of balloons are attached to the outer peripheral surface of the overtube with different positions in the longitudinal direction. FIG. 13 is a perspective view including a partial cross section showing a state in which an overtube with a plurality of balloons is inserted into a lumen for treatment, and FIG. 14 is a state in which the overtube is fixed to a body cavity using a plurality of balloons. FIG. 15 is a perspective view including a partial cross section showing a state in which an overtube is fixed to a lumen using a single balloon.
[0050]
In the third embodiment, portions that are the same as those in the first and second embodiments described above are denoted by the same reference numerals, description thereof is omitted, and only differences are mainly described.
[0051]
In the third embodiment, a balloon is provided on the outer peripheral surface side of the overtube to constitute an endoscope insertion aid that secures a body cavity space when an endoscope or the like is inserted.
[0052]
The overtube 1E shown in FIGS. 12 and 13 of the present embodiment is basically configured in the same manner as the overtube as shown in FIG. 1, but in the middle of the flexible tube portion 3, The difference is that a window portion 23 is provided that can extend the distal end portion of the endoscope 20 inserted through the mirror insertion hole 13.
[0053]
The flexible tube portion 3 of the overtube 1E is provided with a balloon 15a on the distal end side and a balloon 15b on the proximal side so as to sandwich the window portion 23 therebetween. In addition, these balloons 15a and 15b may be detachable with respect to the flexible tube portion 3, or may be fixed.
[0054]
Pipes 17a and 17b extend from the balloons 15a and 15b, respectively, and valves 16a and 16b for adjusting the amount of air injected into the balloons 15a and 15b on the proximal side of the pipes 17a and 17b. Are provided.
[0055]
After the overtube 1E having such a configuration has been inserted to a predetermined position in the luminal organ 24, the overtube 1E is fixed, whereby a conduit through which the endoscope 20 passes is secured. It is the same.
[0056]
Then, by inflating the balloons 15a and 15b, a space is secured in the inner part of the luminal organ 24 sandwiched between the balloons 15a and 15b. In this state, the endoscope 20 can be extended from the window portion 23 to perform observation, and the treatment tool 21 can perform treatment with good operability.
[0057]
In the example shown in FIG. 13, the distal end portion of the endoscope 20 is extended from the window portion 23 to perform treatment or the like. However, the present invention is not limited to this, and similarly to the above, on the distal end side of the overtube 1E. It is also possible to extend the distal end portion of the endoscope 20 from the opening of the endoscope insertion hole 13.
[0058]
Moreover, as shown in FIG. 14, it is also possible to fix an overtube with respect to a body cavity using a plurality of balloons. In the example shown in FIG. 14, the overtube 1 as shown in FIG. 1 is used.
[0059]
With the distal side balloon 15a deflated and the proximal side balloon 15b inflated, the overtube 1 and the endoscope 20 are inserted into the organ wall 25 through the hole 25a. At this time, it is assumed that the proximal balloon 15b is inflated to a larger diameter than the hole 25a of the organ wall 25.
[0060]
Then, when the overtube 1 and the endoscope 20 are inserted to some extent, the balloon 15b hits the organ wall 24 and the insertion stops. Here, by inflating the balloon 15a on the distal end side, the organ wall 24 is sandwiched between the balloons 15a and 15b, and the overtube 1 can be fixed.
[0061]
Furthermore, as shown in FIG. 15, it is also possible to fix the overtube to the lumen using a single balloon. Also in the example shown in FIG. 15, the overtube 1 as shown in FIG. 1 is used.
[0062]
The luminal organ 22 is assumed to have a space extending along the way, for example, from the esophagus to the stomach. When the endoscope 20 is inserted into the luminal organ 22 through the overtube 1, the position of the overtube 1 is fixed by inflating the balloon 15a at a position immediately before the space expands. Accordingly, the position of the endoscope 20 can be stabilized, and observation and treatment with the treatment tool 21 can be performed with good operability. Further, if air is sent through a gap between the endoscope insertion hole 13 of the overtube 1 and the endoscope 20, or if air is sent through an air supply channel of the endoscope, the stomach is inflated. In this case, since the airtight valve 14 is provided as described above, it is possible to effectively prevent the air in the luminal organ 22 from leaking to the outside.
[0063]
According to the third embodiment, it is possible to secure the space in the body cavity by using substantially the same effect as the first and second embodiments described above and using a plurality of balloons. It becomes. Furthermore, it is possible to stably position an overtube, and thus an endoscope, a treatment instrument, and the like with respect to the subject using a plurality of balloons or a single balloon.
[0064]
It should be noted that the present invention is not limited to the above-described embodiments, and various modifications and applications can be made without departing from the spirit of the invention.
[0065]
[Appendix]
According to the above-described embodiment of the present invention described in detail above, the following configuration can be obtained.
[0066]
(1) a tubular member including an insertion hole through which an endoscope can be inserted and a balloon can be inserted; and a plurality of ducts arranged around the insertion hole;
A rod-shaped member that is inserted into the pipe line of the tubular member, and can take a first state that is flexible and variable in shape, and a second state that is fixed while maintaining the shape. ,
Comprising
In a state where the rod-shaped member is inserted and extended through the conduit of the tubular member, and the balloon is inserted and extended through the insertion hole of the tubular member, the balloon is inflated, and then the balloon is expanded. An auxiliary tool for inserting an endoscope, wherein the rod-shaped member takes a function of securing a space in a body cavity by causing the rod-like member to take the second state.
[0067]
(2) The tubular member is capable of taking a first state that is flexible and variable in shape, and a second state that is fixed while maintaining the shape. The endoscope insertion aid described in 1.
[0068]
(3) In the supplementary note (1), the rod-shaped member further functions to fix a position relative to a body cavity by taking the second state after inflating the balloon. The endoscope insertion aid as described.
[0069]
(4) A tubular member that can be inserted through the endoscope, and can take a first state that is flexible and variable in shape, and a second state that is fixed while maintaining the shape;
A plurality of balloons attached to the outside of the tubular member at different positions in the insertion direction; and
An endoscope insertion aid characterized by comprising:
[0070]
(5) The tubular member is provided with a window portion that can extend at least a part of the endoscope at a position between the plurality of attached balloons. The endoscope insertion aid according to (4).
[0071]
【The invention's effect】
As described above, according to the endoscope insertion aid of the present invention, the body cavity space can be effectively secured when an endoscope or the like is inserted using an overtube or the like.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view and a perspective view showing a configuration of an overtube in a first embodiment of the present invention.
FIG. 2 is a side view showing overtubes having different lengths and diameters in the first embodiment.
FIG. 3 is a perspective view showing a distal end side of a configuration in which a plurality of overtubes having different lengths and diameters and an endoscope are combined in the first embodiment.
FIG. 4 is a perspective view including a partial cross section showing a state in which the outer overtube is curved in the first embodiment.
FIG. 5 is a perspective view including a partial cross section showing a state in which the outer and inner overtubes are bent in the first embodiment.
FIG. 6 is a perspective view including a partial cross section showing a state where the outer and inner overtubes and the endoscope are curved in the first embodiment.
FIG. 7 is a perspective view showing a multi-lumen tube and a rod according to a second embodiment of the present invention.
FIG. 8 is a perspective view including a partial cross section showing a state in which only the endoscope is inserted through the multi-lumen tube in the second embodiment.
FIG. 9 is a perspective view including a partial cross section showing a state where a balloon and a plurality of rods are inserted through a multi-lumen tube in the second embodiment.
FIG. 10 is a perspective view including a partial cross section showing a state where a plurality of rods are bent by inflating a balloon in the second embodiment.
FIG. 11 is a perspective view including a partial cross section showing a state in which a rod is fixed and an endoscope is inserted and treated in the second embodiment instead of a balloon.
FIG. 12 is a side view showing a state in which a plurality of balloons are attached to the outer peripheral surface of the overtube at different positions in the longitudinal direction in the third embodiment of the present invention.
FIG. 13 is a perspective view including a partial cross section showing a state in which an overtube with a plurality of balloons is inserted into a lumen for treatment in the third embodiment.
FIG. 14 is a side view including a partial cross section showing a state in which an overtube is fixed to a body cavity using a plurality of balloons in the third embodiment.
FIG. 15 is a perspective view including a partial cross section showing a state where an overtube is fixed to a lumen using one balloon in the third embodiment.
[Explanation of symbols]
1, 1A, 1B, 1E ... Overtube (overtube for endoscope) (tubular member)
1C Multi-lumen tube (tubular member)
1D ... Rod (Rod-shaped member)
2 ... Operation part
3 ... Flexible tube
4 ... Control lever
5 ... Moving groove
6 ... Inner sheath
7 ... Outer sheath
8. Friction member
9 ... Transmission member
10: Outer sheath fixing member
11 ... fixed part
12 ... Inner sheath fixing member
13 ... Endoscope insertion hole (insertion hole)
14 ... Airtight valve
15a, 15b, 26 ... balloon
16a, 16b ... Valve
18 ... Rod lumen (pipe)
20 ... Endoscope
21 ... treatment tool
23 ... Window

Claims (3)

A first tubular member that can be inserted through the endoscope and that can take a first state that is flexible and shape-variable, and a second state that is fixed while maintaining the shape;
A second tubular member for inserting the first tubular member into the interior; the second tubular member capable of taking the first state and the second state;
Comprising
A function of securing a space in the body cavity by taking the second state in a state where at least one of the first tubular member and the second tubular member is inserted into the body cavity and curved. An endoscope insertion aid characterized by fulfilling At least one of the first tubular member and the second tubular member is inserted into the body cavity and bent to take the second state, thereby further fixing the position relative to the body cavity. The endoscope insertion aid according to claim 1, which functions. A tubular member provided with an insertion hole through which an endoscope can be inserted and a balloon can be inserted; and a plurality of ducts arranged around the insertion hole;
A rod-shaped member that is inserted into the pipe line of the tubular member, and can take a first state that is flexible and variable in shape, and a second state that is fixed while maintaining the shape. ,
Comprising
In a state where the rod-shaped member is inserted and extended through the conduit of the tubular member, and the balloon is inserted and extended through the insertion hole of the tubular member, the balloon is inflated, and then the balloon is expanded. An auxiliary tool for inserting an endoscope, wherein the rod-shaped member takes a function of securing a space in a body cavity by causing the rod-like member to take the second state.

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