JP4804664B2 - Endoscope insertion aid - Google Patents

Description

[0001]
[Prior art]
Conventionally, by inserting a long and thin insertion portion into a body cavity, the inside of a body cavity can be observed, and various medical treatments can be performed using a treatment instrument inserted into a treatment instrument channel as necessary. Endoscopes are widely used.
[0002]
However, it is difficult to smoothly insert the elongated insertion portion to the target site in the body cavity.For example, U.S. Pat.No. 4,207,872 is provided with a protrusion that protrudes and retracts by changing the fluid supply state, An apparatus and a method for advancing an endoscope through a body cavity in which insertion of the endoscope insertion portion into a living body can be improved by attaching the sleeve to the endoscope are disclosed.
[0003]
[Problems to be solved by the invention]
However, the apparatus and method for advancing an endoscope through the body cavity of the above-mentioned US Pat. No. 4,207,872 require a conduit for inflating and contracting each protrusion provided on the sleeve and a fluid pressure control means. . For this reason, not only the workability becomes complicated, but also the apparatus becomes expensive. Further, if the projection provided on the sleeve is still protruding, when the endoscope is removed, the projection may be caught in a body cavity such as the intestinal tract and the endoscope may not be removed. For this reason, when extracting, the said protrusion had to be contracted, and the operation for that was troublesome.
[0004]
Further, during the examination, the sleeve is gradually displaced from the endoscope, which may deteriorate the insertion property and the observation / treatment property.
[0005]
The present invention has been made in view of the above circumstances, and an object thereof is to provide an endoscope insertion assisting tool that improves the insertability of an endoscope insertion portion that is simple in structure and easy to handle. .
[0006]
[Means for Solving the Problems]
An endoscope auxiliary tool according to an aspect of the present invention includes a flexible tubular member that is detachable from a part of an endoscope insertion portion, and projects obliquely or axially with respect to the axial direction of the tubular member. A flexible thin-walled fin-shaped protrusion provided on a non-circumferential circumference, wherein the fin-shaped protrusion is in a direction opposite to the protruding direction of the fin-shaped protrusion along the axial direction of the tubular member. to have a flexibility Mekureru backwards when an external force of less than 3 Kg / cm @ 2 is applied, frictional force against the intestinal wall when it becomes the everted state is gripping the intestine increases.
[0007]
According to this configuration, by attaching a tubular member provided with a fin-like projection portion to the endoscope insertion portion, for example, when the endoscope is pulled back in the intestinal tract, the fin-like projection portion has an appropriate friction against the intestinal tract. To shorten the intestinal tract and allow smooth insertion. Further, when the endoscope is removed, the endoscope insertion portion is removed with the flexible thin-walled fin-like protrusion turned up.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
1 to 5 relate to a first embodiment of the present invention, FIG. 1 is a view for explaining an insertion assisting tool that is detachable from the endoscope insertion portion, and FIG. 2 is a view for explaining the endoscope insertion portion. 3 is a diagram illustrating a state in which a plurality of insertion aids are mounted on the endoscope insertion portion, FIG. 4 is a diagram illustrating a state in which the endoscope insertion portion is inserted deep into the large intestine, and FIG. 5 is an endoscope insertion portion. It is a figure explaining the effect | action of the insertion auxiliary tool with which the endoscope insertion part was mounted | worn when pulling operation was carried out.
[0009]
As shown in FIG. 1, an endoscope insertion assisting tool (hereinafter abbreviated as an insertion assisting tool) 1 of the present embodiment includes a flexible tubular member 2 that is detachably attached to an endoscope insertion portion to be described later, A plurality of fin-shaped projections 3 having a flexible, flat and thin shape projecting from the outer surface of the tubular member 2 toward one end side with an inclination angle of, for example, 10 ° to 45 ° with respect to the axis of the tubular member 2. ing.
[0010]
Although only three fin-like projections 3 are depicted in this figure, in reality, four fin-like projections 3 are provided at substantially equal intervals on one circumference of the tubular member 2.
Moreover, although the tubular member 2 and the fin-shaped protrusion 3 are integrally formed of a flexible member having an elastic force such as rubber in the present embodiment, the insertion assisting tool 1 is shown. The protrusion 3 may be formed of separate members and integrated to form the insertion assisting tool 1.
[0011]
As shown in FIG. 2, the endoscope insertion portion 4 (in other words, the insertion portion of the endoscope) includes a distal end portion 5 in order from the distal end side, a bending portion 6 that bends in a desired direction by a hand operation (not shown), A flexible portion 7 formed of a flexible member having flexibility is provided continuously.
[0012]
A connection portion between the tip portion 5 and the bending portion 6 is provided with a first connection convex portion 8a formed by raising an adhesive or the like, and a connection portion between the bending portion 6 and the flexible portion 7 is provided. Is also provided with a second connection projection 8b similar to the first connection projection 8a.
[0013]
The bending portion 6 has a bending portion front portion 6a that is set to have a relatively small curvature radius R1 during bending, and a bending radius that is larger than the bending portion front portion 6a and that has a relatively large curvature radius R2. It is comprised by the part rear part 6b. And the convex part 6c similar to the said connection convex part 8a, 8b is provided between the said curved part front part 6a and the said curved part rear part 6b. In addition, the member which becomes resistance with respect to bending is arrange | positioned inside the bending part rear part 6b which is not shown in figure, By this, the bending part rear part 6b becomes a structure which is harder to bend than the bending part front part 6a.
[0014]
As shown in FIG. 3, the insertion assisting tool 1 includes a plurality of insertion assisting tools 1a, 1b, 1c, 5a in the flexible part 7 of the endoscope insertion part 4 and the bending part rear part 6b of the bending part 6. 1d and 1e are prepared). At this time, it arrange | positions so that the edge part of the fin-shaped projection part 3 of each insertion auxiliary tool 1a, ..., 1e may face the base end side.
[0015]
The insertion assisting tools 1a,..., 1e are mounted and arranged closer to the base end side than the convex portion 6c, and the distal end side end of the tubular member 2a of the insertion assisting tool 1a is abutted against the convex portion 6c. It is in the state.
[0016]
The insertion assisting tools 1b and 1c are mounted and disposed between the insertion assisting tool 1a and the second connection convex portion 8b, and the insertion assisting tools 1d and 1e are mounted and disposed closer to the base end side than the second connection convex portion 8b. ing. At this time, the end portion side end portion of the tubular member 2d of the insertion assisting tool 1d is brought into contact with the second connection convex portion 8b.
[0017]
The inner diameter dimension of the tubular member 2 in the natural state of the insertion assisting tool 1 is set to be smaller than the outer diameter dimension of the curved portion rear portion 6 b and the flexible portion 7. Accordingly, when the insertion assisting tool 1 is mounted on the endoscope insertion portion 4, the inner diameter of the tubular member 2 is mounted while expanding against the elastic force. Therefore, the insertion assisting tools 1a,..., 1e mounted and arranged at predetermined positions of the endoscope insertion portion 4 are fixedly arranged so that they are not easily displaced by the elastic force of the tubular member 2 with respect to the endoscope insertion portion 4. Is done.
[0018]
Specifically, two or three fin-like projections 3 are pinched with fingers, and the opening of the tubular member 2 is expanded so as to be larger than the outer diameter of the endoscope insertion portion 4, and the insertion assisting tool 1 is expanded. The soft part 7 or the curved part rear part 6b is moved to a predetermined position and attached. At this time, since the tubular member 2 is flexible, this operation can be easily performed. In order to facilitate this work, it is desirable to make the opening of the tubular member 2 easy to expand. For this purpose, a plurality of the fin-like projections 3 are provided and pulled from a plurality of directions to open the opening. It is intended to be expanded to a desired state.
[0019]
The outer diameter dimensions of the convex portions 8b and 6c are set to be substantially equal to or larger than the outer diameter dimension of the tubular member 2 attached to the endoscope insertion portion 4. This prevents the end surface portion of the tubular member 2 from getting over the convex portions 8b and 6c, thereby enabling more reliable position regulation.
[0020]
In the mounted state shown in FIG. 3, the fin-like protrusion 3 is thin and flat with respect to the axial direction of the tubular member 2 and the endoscope insertion portion 4 and has a predetermined flexibility. When an external force F as indicated by an arrow, for example, is applied from the rear side in the axial direction of the tubular member 2 and the endoscope insertion portion 4, it is turned in the opposite direction from the state of the solid line 3d as indicated by the broken line 3d.
[0021]
The external force F at this time is specifically an amount of force less than 3 kg / cm 2. For example, when the contact area at the end of the fin-shaped protrusion 3 d is 1 cm 2, the external force F is less than 3 kg, The protrusion 3d turns in the opposite direction. The reason why the force is set to be less than 3 kg / cm 2 is shown in the literature, medical instrumentation (Vo 1.67, N0.7, 289-292, 1997), but the object is 3 kg / cm 2 toward the intestinal wall. This is because pressing with the above force may give an excessive burden to the intestinal wall. By turning the fin-shaped projection 3 with a force of less than 3 kg / cm 2, an excessive burden is applied to the intestinal wall. Has been prevented from giving.
[0022]
In this figure, although five insertion assisting tools 1a,..., 1e are prepared and these insertion assisting tools 1a,..., 1e are mounted on the endoscope insertion portion 4, an insertion assisting tool is shown. The number of 1 is not limited to five, and may be smaller or even larger than five. That is, it is sufficient to install as many as the user needs.
[0023]
The operation when the insertion assisting tool 1 configured as described above is attached to the endoscope insertion portion 4 will be described.
As shown in FIG. 4, when the distal end portion 5 is already in the middle of the descending colon and the splenic curvature and is in the middle of the long sagging transverse colon, the liver 5 is in a position to approach the ascending colon. The bent portion front portion 6a and the bent portion rear portion 6b are often bent at the bent portion in the middle of the colon. In addition, since the fin-like projections 3a,..., 3e of the five insertion aids 1a,..., 1e protrude obliquely backward with respect to the insertion direction at the time of insertion so far, The fin-like protrusions 3a, ..., 3e are not very resistant so that they can be inserted smoothly.
[0024]
When the bending portion front portion 6a and the bending portion rear portion 6b are in a curved state, if the soft portion 7 is continuously pushed as shown by the solid arrow A, the intermediate portion of the transverse colon is pushed downward further. The tip 5 is difficult to advance in the direction of the liver fold. In such a situation, the soft part 7 is pulled and operated as indicated by a broken line arrow B.
[0025]
When this pulling operation is performed, as shown in FIG. 5, the ends of the fin-like projections 3a,..., 3e of the insertion aids 1a,. Then, the fin-like projections 3a, ..., 3e are elastically deformed and turned up. In this state, the frictional force against the intestinal wall increases, and when a certain amount of pulling operation force is applied, the effect is as if the fin-like projections 3a, ..., 3e grip the intestinal tract. That is, the part of the long transverse colon from the insertion assisting tool 1a to the insertion assisting tool 1e and the part on the proximal end side relative to the insertion assisting tool 1e are linearized so as to be folded.
[0026]
Then, when the transverse colon is substantially linearized as shown in FIG. 5, the pushing operation is again performed as indicated by the broken line arrow D. Then, the distal end portion 5 is smoothly inserted into the liver curved portion and the ascending colon from the linearized transverse colon. At this time, since the insertion assisting tools 1a,..., 1e are arranged in the endoscope insertion portion 4, it is difficult for the intestinal tract of the transverse colon that has been folded once to return to its original state.
[0027]
That is, in a state where the insertion assisting tool 1 is not attached to the endoscope insertion portion 4 at all, even if the transverse colon can be shortened, the endoscope insertion portion 4 is then advanced. At this time, it is not uncommon for the once-folded transverse colon to move and flow forward from the distal end portion 5 to return to the original state.
[0028]
Since the fin-like projections 3a,..., 3e are not biting into the intestinal wall but are in contact with each other in a turned state, the soft part 7 is further indicated by a solid arrow C in the state of FIG. When the pulling operation is performed, the frictional force increases as compared with the case where the insertion is performed by performing the pushing operation, but the endoscope insertion portion 4 is removed.
[0029]
When the flexible projection 7 is pulled and the fin-like projection 3 is turned up, a force that moves the tubular member 2 toward the distal end 5 of the endoscope insertion portion 4 acts. However, the convex portion 6c provided in the endoscope insertion portion 4 restricts the movement of the insertion assisting tool 1a toward the distal end portion 5 and prevents the endoscope insertion portion 4 from falling off. Further, the insertion assisting tool lb is restricted from moving toward the distal end portion 5 by the insertion assisting tool 1a, and is prevented from falling off from the endoscope insertion part 4. Further, the insertion assisting tool 1c is restricted from moving toward the distal end portion 5 by the insertion assisting tool 1b, so that the insertion assisting tool 1c is prevented from falling off the endoscope insertion part 4.
[0030]
On the other hand, the position of the insertion assisting tool ld is prevented from falling off from the endoscope insertion portion 4 because the movement toward the distal end portion 5 side is restricted by the second connection convex portion 8b provided in the endoscope insertion portion 4. The Further, the insertion assisting tool 1e is restricted from moving toward the distal end portion 5 by the insertion assisting tool 1d, and is prevented from falling off from the endoscope insertion part 4.
[0031]
In this way, the endoscope insertion portion has a flexible tubular member, and a flexible, flat, thin-walled shape that protrudes from the outer surface of the tubular member toward the one end side at a predetermined inclination angle with respect to the axial direction of the tubular member. By providing an insertion aid composed of a fin-like projection, the end of the fin-like projection comes into contact with the body cavity wall when the flexible part is pulled while inserting the endoscope insertion part. The insertability of the endoscope insertion portion can be improved by folding the body cavity wall with the frictional force generated by this.
[0032]
Further, by providing a plurality of fin-like projections on one circumference of the outer surface of the tubular member, when the soft part is pulled, the end of the fin-like projection can be brought into contact with the body cavity wall with a high probability. Can do.
[0033]
Furthermore, the fin-shaped protrusion is formed in a flat thin shape so that it can be turned in the opposite direction with a force of less than 3 kg / cm 2 from the rear in the axial direction. When the part is brought into contact with the body cavity wall, it is possible to prevent the end part from being recessed into the body cavity wall and applying an excessive load to the body cavity wall, and further inserting the endoscope by pulling the flexible part. The part can be removed from the body cavity.
[0034]
In addition, when providing a convex portion at a predetermined position of the endoscope insertion portion and mounting and placing the insertion auxiliary tool closer to the base end side than the convex portion, when the fin-like projection portion is turned up, By restricting the insertion assisting tool from moving to the distal end side, it is possible to reliably prevent the insertion assisting tool from falling off the endoscope insertion portion.
[0035]
Also, a convex part is provided between the front part of the curved part and the rear part of the curved part, and the insertion assisting tool is mounted and arranged behind the convex part, so that the bending function of the front part of the curved part is obstructed by the insertion assisting tool. In addition to being able to prevent this, the convex portion serves as a guide when the insertion assisting tool is mounted, and the user can easily determine the appearance.
[0036]
As a result, the insertion assisting tools 1a, 1b, and 1c are shifted to the distal end portion 5 side and disposed on the bending portion front portion 6a, so that the bending function of the bending portion front portion 6a having a small turn does not deteriorate. That is, by providing the convex portion 6c, a good bending function of the bending portion front portion 6a is ensured.
[0037]
Here, since the bending portion rear portion 6b is originally a portion having a large curvature radius, the bending portion front portion 6a and the bending portion rear portion 6b are more difficult to bend when a plurality of insertion aids are attached. When considered as a bending function combined with the above, there is almost no adverse effect on the bending function.
[0038]
In addition, the structure of the fin-shaped projection part 3 which comprises the insertion assistance tool 1 is not limited to the structure which makes the fin-shaped projection part 3 protrude diagonally with respect to an axial direction from the outer surface of the tubular member 2, as mentioned above. Instead, the insertion assisting tool 20 may be configured by projecting the fin-like projection 21 along the axis of the tubular member 22 as shown in the drawing showing another configuration of the fin-like projection of FIG. That is, the fin-like protrusion 21 and the tubular member 22 are formed of the same tube body, and the insertion aid 20 is formed by cutting out a part of the tube body.
[0039]
Thus, even when the fin-like protrusion 21 is not in the obliquely rearward direction of the tubular member 22 but is directed in the axial direction, the endoscope insertion portion 4 that is actually inserted into the large intestine has a bent shape. Since there are many cases, the end of the fin-like projection 21 is separated from the outer surface of the endoscope insertion portion 4 on the outside of the bent portion, and is in a state of projecting obliquely. Effects and effects can be obtained.
[0040]
In addition to the effects of the above-described embodiment, the insertion assisting tool 20 can be formed by cutting a long tube body into a predetermined shape with a cutter such as an automatic machine. Become.
[0041]
By the way, the outer diameter of a favorite endoscope is often different depending on the operator. Therefore, it is necessary to form an insertion assisting tool corresponding to the outer diameter size of each endoscope insertion portion so as to correspond to the operator's preference.
[0042]
7A is a view in which the insertion assisting tool 1 is mounted on the insertion portion 32 of the large-diameter endoscope 31, and FIG. 7B is an insertion assisting tool 1A in the insertion portion 42 of the small-diameter endoscope 41. FIG.
[0043]
The inner diameter in the natural state of the tubular member 2 constituting the insertion assisting tool 1 and the tubular member 2A constituting the insertion assisting tool 1A is different from the outer diameter of the endoscopes 31 and 41 to be mounted. They differ depending on the dimensions, and are set smaller than the outer diameter dimensions of the insertion portions 32 and 42, respectively.
[0044]
Moreover, the length dimension of the fin-shaped projection part 3 which comprises the insertion assistance tool 1 and the fin-shaped projection part 3A which comprises the insertion assistance tool 1A is also different. Specifically, the length dimension of the fin-shaped projection part 3 is different. Is set to be relatively short and the length of the fin-like projection 3A is set to be relatively long, and the outer diameter of the end of the fin-like projection 3 and the outer diameter of the end of the fin-like projection 3A are approximately Equivalent (φD).
[0045]
For example, when an endoscope is used for a patient having a similar physique, a certain operator uses a large-diameter endoscope 31 and a certain operator uses a small-diameter endoscope 41. In this case, if the fin-like projection 3A of the insertion assisting tool 1A has the same length as the fin-like projection 3 of the insertion assisting tool 1, the outer diameter to the end of the fin-like projection 3A is φD. Smaller. That is, this makes it difficult for the end of the fin-like projection 3A to come into contact with the intestinal wall, and the same action and effect as the fin-like projection 3 of the insertion aid 1 cannot be obtained.
[0046]
However, in the present embodiment, since the outer diameter of the fin-shaped protrusion 3 and the end of the fin-shaped protrusion 3A is configured by φD which is substantially the same, a large-diameter endoscope having different outer diameters. 31. By attaching the insertion aids 1 and 1A corresponding to the small-diameter endoscope 41, the same actions and effects can be obtained on the intestinal wall. As a result, even in endoscopes having different outer diameters, the action of the protrusion of the insertion aid on the intestinal tract can be obtained equally.
[0047]
In addition, it is still more effective if the thickness of the fin-like projection 3A is made slightly thicker than that of the fin-like projection 3 as well as the outer diameter of the fin-like projection 3 and the end of the fin-like projection 3A. . That is, the longer fin-shaped protrusion 3A is easier to bend as a whole, but by increasing the thickness, the ease of bending when an external force is applied to the end can be made the same. Therefore, it seems that the surgeon is appropriate for each patient by preparing a large number of insertion aids with varying thickness, hardness, width, etc., as well as the length of the fin-like projections. The best observation and treatment can be performed by selecting and installing the specified insertion aid.
[0048]
In addition, as can be said for the above-described embodiment, the axial length of the tubular member is sufficiently longer than the thickness of the fin-like protrusion in the axial direction. This is to prevent the entire tubular member from being turned when the fin-like protrusion is turned by an external force.
[0049]
Furthermore, when removing the insertion aid described so far after endoscopy, it can be easily removed by pinching a plurality of fin-like protrusions with fingers to widen the opening of the tubular member and turning the tubular member. it can.
[0050]
Further, the insertion assisting tool may be a disposable type or a reuse type. When the insertion aid is constituted by reuse, the tubular member is formed by projecting a fin-like projection from the end of the tubular member. The gap between the fin-like protrusion formed when projecting from the middle part of the outer surface of the tube and the tubular member can be eliminated, and the detergency becomes good.
[0051]
FIG. 8 is a view for explaining another configuration example of the insertion assisting tool according to the second embodiment of the present invention.
As shown in the figure, the insertion assisting tool 1C of the present embodiment is formed as one long sheath. Hydrophilic lubrication is applied to the outer surface of the insertion assisting tool 1C. For this reason, lubricity becomes very good because moisture adheres to the outer surface. It should be noted that the inner surface of the insertion assisting tool 1C is not subjected to hydrophilic lubrication treatment.
[0052]
The distal end portion of the insertion assisting tool 1C is provided with a narrow-diameter portion 51 that has a smaller diameter than others by thermoforming. The small-diameter portion 51 is inserted and disposed in a recessed portion 6d that is a part of the bending portion 6, for example, formed at the boundary between the bending portion front portion 6a and the bending portion rear portion 6b. That is, the insertion assisting tool 1C is mounted and fixed at a predetermined position by fitting the small diameter portion 51 into the recess 6d.
[0053]
In addition, a plurality of fin-like protrusions 62 are formed at the base end of the insertion assisting tool 1C, and the fin-like protrusions 62 are formed so that the end face side is spread outward by thermoforming. .
[0054]
By attaching the insertion aid 1C configured as described above to the insertion portion of the endoscope, when the endoscope is inserted into the large intestine, for example, moisture in the large intestine adheres to the outer surface of the insertion aid 1C. Since very good lubricity can be obtained, the soft portion 7 can be inserted smoothly by pressing.
[0055]
Further, when the pulling operation is performed, friction is increased by the action of the fin-like projections 62 contacting the intestinal wall, and body wall control such as folding the intestinal wall by the above-described action is performed. The outer surface of the fin-like projection 62 is subjected to hydrophilic lubrication treatment, but the inner surface which is the back surface is not subjected to hydrophilic lubrication treatment. Therefore, when the soft portion 7 is pulled, the fin-like projection 62 When the part 62 is turned over, the inner surface comes into contact with the intestinal wall, and the friction increasing effect is sufficiently exhibited.
[0056]
The fin-shaped protrusions 3 (3a,..., 3e), 3A described above may also be subjected to hydrophilic lubrication to change the friction coefficient between the outer surface and the inner surface.
[0057]
It should be noted that the present invention is not limited to the embodiments described above, and various modifications can be made without departing from the spirit of the invention.
[0058]
[Appendix]
According to the embodiment of the present invention as described above in detail, the following configuration can be obtained.
[0059]
(1) a flexible tubular member that is detachable from a part of the endoscope insertion portion;
A flexible thin-walled fin-like protrusion provided on a non-circumferential circumference that projects obliquely or axially with respect to the axial direction of the tubular member;
An endoscope insertion aid comprising:
[0060]
(2) The fin-shaped protrusion in a state where the tubular member is attached to the endoscope, the fin-shaped protrusion is turned in a direction opposite to the protruding direction with respect to a predetermined external force in the axial direction of the tubular member. Endoscope insertion aid.
[0061]
(3) The endoscope insertion aid according to appendix 2, wherein the predetermined axial external force is less than 3 kg / cm2.
[0062]
(4) The endoscope insertion aid according to appendix 1, wherein a plurality of the fin-like protrusions are provided.
[0063]
(5) The tubular member is an endoscope insertion assisting tool having a plurality of different types depending on the shape and size of the fin-like protrusions provided on the tubular member.
[0064]
(6) The endoscope insertion assisting tool according to appendix 1, wherein the axial length of the tubular member is larger than the thickness of the fin-like protrusion.
[0065]
(7) The endoscope insertion assisting tool according to appendix 1, wherein the tubular member is attachable to and detachable from an endoscope insertion portion having a different outer diameter.
[0066]
(8) Endoscope insertion assist in which an endoscope having a curved portion at the endoscope insertion portion and a tubular member that is detachably attached to a part of the insertion portion of the endoscope is provided with a fin-like projection portion In an endoscope apparatus having a tool,
An endoscope apparatus provided with a restricting portion for restricting a positional shift of the tubular member in a predetermined direction when the tubular member is attached to the endoscope insertion portion in the endoscope.
[0067]
(9) The endoscope apparatus according to appendix 7, wherein the restriction portion is provided closer to the proximal side than the middle portion of the bending portion of the endoscope insertion portion.
[0068]
【The invention's effect】
As described above, according to the present invention, it is possible to provide an endoscope insertion aid that improves the insertability of an endoscope insertion portion that is simple in structure and easy to handle.
[Brief description of the drawings]
FIG. 1 to FIG. 5 relate to a first embodiment of the present invention, and FIG. 1 is a diagram for explaining an insertion assisting tool that is detachably attached to an endoscope insertion portion. Fig. 3 is a diagram for explaining a state in which a plurality of insertion aids are attached to the endoscope insertion portion. Fig. 4 is a diagram showing a state in which the endoscope insertion portion is inserted deep into the large intestine. The figure explaining the effect | action of the insertion auxiliary tool with which the endoscope insertion part was mounted | worn at the time of pulling operation of an endoscope insertion part. FIG. 6 is a figure which shows the other structure of a fin-shaped projection part. FIG. 8 is a diagram illustrating a configuration example in which an insertion assisting tool is mounted on endoscopes having different diameters. FIG. 8 is a diagram illustrating another configuration example of the insertion assisting tool according to the second embodiment of the present invention.
DESCRIPTION OF SYMBOLS 1 ... Endoscope insertion auxiliary tool 2 ... Tubular member 3 ... Fin-shaped projection part 4 ... Endoscope insertion part 6c ... Convex part 8b ... Second connection convex part

Claims (3)

A flexible tubular member detachably attached to a part of the endoscope insertion portion;
Projecting along an oblique direction or an axial direction with respect to the axial direction of this tubular member, and comprising a flexible thin-walled fin-like projection provided on a non-circumferential circumference,
The fin protrusions have a flexibility Mekureru backwards when the tubular external force along the axial direction in the protruding direction opposite to the direction of the fin-like projections of less than 3 Kg / cm @ 2 of the member is applied, the turn-up An endoscope insertion aid characterized in that the frictional force against the intestinal wall increases and the intestinal tract is gripped when it becomes in a stale state .   The length of the fin-like projection is set so that the outer diameter defined by the end of the fin-like projection when the tubular member is attached to the endoscope insertion portion is the set dimension. The endoscope insertion aid according to claim 1, wherein the endoscope insertion aid is characterized in that:   The endoscope auxiliary tool according to claim 1 or 2, wherein the tubular member is attached to a proximal side from a middle portion of the bending portion of the endoscope insertion portion.

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