JPH04354929A - Endscope - Google Patents

Abstract

PURPOSE:To achieve inserting, advancing and retracting operations easily and safely by preventing damage without buckling on the side of a hand grip of an inserting section. CONSTITUTION:An inserting section comprising a tip part 2, a soft par 3, a middle soft part 4 and a hard part 5 is inserted through a treating device channel of a master endoscope using a guide tube, and the inserting section is inserted into a part to be inspected via the treating device channel to perform an observation. At this point, the front part of an operating section 6 for performing inserting, advancing and retracting operations makes the hard part 5. The operating section 6 is held to perform an operation of inserting the inserting part containing the hard part 5 into, advancing it to or retracting it from a guide tube.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention relates to a parent-child scope type endoscope device, in which a small-diameter inner endoscope is inserted through a guide tube into a treatment instrument channel of a parent endoscope to observe a region to be examined. Regarding endoscopy.

0002

[Prior Art] As an endoscope device for observing the inside of the bile duct, pancreatic duct, etc., there is a master endoscope that has an insertion section that can be inserted up to the duodenum, and a treatment instrument channel of the master endoscope that is inserted into the pancreatic and bile ducts. A parent-child scope type endoscope apparatus that uses a child endoscope having an insertion section is known.

[0003] Since the child endoscope has an extremely small diameter, it has problems such as not being able to properly insert the endoscope into the test site or being damaged. Therefore, JP-A-1-
An endoscope apparatus has been proposed in which a child endoscope is inserted into a test site via a guide tube as disclosed in Japanese Patent No. 254135. This endoscope device uses a guide tube to allow easy and safe insertion of the child endoscope, and also utilizes the gap between the inner wall of the guide tube and the child endoscope to secure the field of view. It is possible to wash the test site by supplying water with physiological saline or the like.

0004

However, in the conventional example described above, the insertion section of the child endoscope is constructed of a flexible and small diameter member. For this reason, there is a risk that the insertion portion on the proximal side may be bent during insertion. After inserting the guide tube and child endoscope, the child endoscope may be moved forward and backward to ensure the field of view of the endoscope and to insert the tip to the area you want to observe. This causes problems such as the portion being bent between the guide tube and the guide tube, resulting in buckling and damage.

The present invention has been made in view of these circumstances, and provides an endoscope that can prevent breakage without buckling on the proximal side of the insertion section, and that can be easily and safely inserted and advanced/retracted. is intended to provide.

[0006]

[Means for Solving the Problems] The endoscope according to the present invention has the following features:
In an endoscope in which the insertion section is inserted into a treatment instrument channel of a parent endoscope using a guide tube, and the insertion section is inserted into a test site through this treatment instrument channel for observation, the insertion section is inserted into the guide tube. An operating section for inserting and advancing/retracting the guide tube is provided, and at least the operating section side of the insertion site located in front of the operating section and inserted through the guide tube is made rigid.

[0007]

[Operation] The insertion section is inserted into the treatment instrument channel of the parent endoscope using a guide tube, and the insertion section is inserted into the test site through the treatment instrument channel for observation. At this time, at least the operation section side of the insertion site that is located in front of the operation section for inserting and moving forward and backward and inserted into the guide tube is rigid, and the operation section is grasped to include the hard section. Insert and move the insertion section into and out of the guide tube.

[0008]

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 20 relate to the first embodiment of the present invention,
FIG. 1 is an explanatory diagram showing the overall configuration of the endoscope, FIG. 2 is an explanatory diagram showing the relationship between the operating section and the gripping section of the endoscope in FIG. 1, FIG. 3 is an explanatory diagram showing the configuration of the guide catheter, and FIG. is a partially cutaway sectional view showing the configuration of the gripping portion of the endoscope in FIG. 1, FIG. 5 is a partially cutaway sectional view taken along the line A-A' in FIG. 4, and FIG. 7 is a partially cutaway sectional view showing how the guide catheter is inserted into the operating section and rigid section of the endoscope in FIG. 1; FIG. 8 is a partially cutaway sectional view showing the operation section of the endoscope in FIG. An explanatory diagram showing the arrangement state, FIG. 9 is a sectional view showing the configuration of the distal end of the endoscope in FIG. 1, FIG. 10 is an explanatory diagram showing the relationship between the endoscope and the pancreatic and bile ducts, and FIG. An explanatory diagram showing the length relationship of the guide catheter and the guide catheter, FIG.
13 is an explanatory diagram showing a state in which the endoscope is inserted into the guide catheter to the first stopper position, FIG. 13 is an explanatory diagram showing the state in which the endoscope is inserted into the guide catheter to the second stopper position, and FIG. is an explanatory diagram showing a first modification example of the rigid part, FIG. 15 is an explanatory diagram showing a second modification example of the rigid part, FIG.
6 is an explanatory diagram showing a third modified example of the rigid part, FIG. 17 is a sectional view showing an example of the rigid part whose stopper position can be adjusted, and FIG. 18
19 is a cross-sectional view showing an example of a guide catheter with an adjustable stopper position, FIG. 19 is an explanatory view showing the configuration of an insertion aid, and FIG. 20 is an illustration of the insertion aid shown in FIG. 19 being attached to the forceps mouthpiece of a parent endoscope. FIG.

The endoscope of the present invention is used in a parent-child scope type endoscope device, and is inserted into the treatment instrument channel of the parent endoscope using a guide tube, and the insertion portion is covered through the treatment instrument channel. This is a child endoscope that is inserted into the examination site for observation.

As shown in FIG. 1, an endoscope 1 has a distal end 2 as an insertion section inserted into a guide tube.
, a flexible flexible portion 3 connected to the tip portion 2;
Intermediate flexible section 4 connected to this flexible section 3, intermediate flexible section 4
It has a hard part 5 which is connected to the hard part 5. The hard part 5 is connected with an operating part 6 which is gripped and used for insertion, forward and backward operations, etc., and this operating part 6 is connected to the grip part 8 via a soft guide tube 7.
It is connected to. The grip section 8 is provided with an eyepiece section 9 for performing naked eye observation or connecting a camera or the like to take an image. Further, a universal cord 10 is connected to the side of the grip portion 8, and a light guide connector 11 connected to a light source device is provided at the end of the universal cord 10. Further, as shown in FIG. 2, the operating section 6 and the gripping section 8 are provided separately via a flexible guide tube 7, so that only the operating section 6 is used when inserting the endoscope 1. The insertion operation is carried out by grasping, and during observation, an image is taken or observed through the eyepiece 9 of the grasping section 8.

A guide catheter serving as a guide tube used when inserting the endoscope 1 into the treatment instrument channel of the parent endoscope is constructed as shown in FIG. The guide catheter 13 is composed of a hollow tube, and a flexible tube 14 is inserted into the treatment instrument channel of the parent endoscope.
and a hand base portion 15. The proximal base portion 15 is provided with an insertion port 16 into which the endoscope 1 is inserted. Further, the proximal cap part 15 is provided with a liquid feeding port 17 to which a syringe or the like for feeding liquid is connected.
Physiological saline or the like is supplied to the area to be examined. An expanded portion 18 is provided on the proximal side of the flexible tube 14 so that the hard portion 5 of the endoscope 1 can be inserted therethrough. This expanded portion 18 is arranged in the soft tube 1 in accordance with the outer diameter of the hard portion 5.
4 is formed by expanding it by thermoforming, or is made of a hard tube having an inner diameter larger than that of the soft tube 14, so that the hard portion 5 can be inserted up to the expanded portion 18.

As shown in FIG. 4, the gripping portion 8 is provided with a space inside. The image guide 20, which is made of quartz or the like and is inserted up to the tip 2, passes through the grip 8 and is connected to the eyepiece 9, and draws a large arc in this space to take up slack. Thereby, the image guide 20 can be assembled while absorbing variations without having to cut the image guide 20 to match the length up to the distal end 2 and adjust the length.

Further, as shown in FIG.
It is fixed at 2. Six screw holes 24 are provided in the grip base part 23, and the cord base part 25 is fixed with three screws 22. Universal cords, etc. can sometimes get twisted, making it difficult to limit the orientation of connectors connected to the cord or change the orientation as needed, but the number of screws that secure the screw holes By providing an integral multiple of and equally spaced,
The orientation of connectors, etc. can be freely set. Here, since six screw holes 24 are provided for three screws 22, the orientation can be set in units of 60 degrees. Note that if the screw holes 24 are provided in the base portions at both ends of the universal cord 10 as described above, the orientation can be set in 30° increments.

FIG. 6 shows details of section B in FIG. 4. The guide tube 7 that connects the operating section 6 and the grip section 8 is a flexible tube covered with a jacket tube 26, and therefore a wire 27 is inserted therein to prevent it from elongating. The guide tube grip side mouthpiece 28 has a through hole 2 approximately perpendicular to the length direction of the tube.
9 is provided, and a threaded portion 30 is provided so as to perpendicularly intersect with this through hole 29. The end of the wire 27 is inserted into the through hole 29 and fixed from the side with a screw 31. By fixing with screws in this manner, the efficiency and reliability of the assembly work can be improved compared to fixing with adhesive or solder.

FIG. 7 is a partially cutaway sectional view showing details of the operating section 6 and the rigid section 5. As shown in FIG. The end of the elongation-preventing wire 27 in the guide tube 7 is fixed in the operation section 6 by a threaded portion 34 provided on the guide tube operation section side mouthpiece 33 in the same manner as on the grip section 8 side. Further, the light guide and the image guide are covered with a protective tube 35 made of silicon or the like from the inside of the operating section 6 to the distal end of the guide tube 7. As shown in FIG. 8, the protective tube 35 includes a light guide 37 covered with a silicon tube 36 and an image guide 39 covered with an IRRAX tube 38 made of IRRAX (trade name), which is slightly harder than silicone. It is inserted. The image guide 39 is made of quartz or the like and is hard, so by covering it with a irax tube 38, it is cheaper and more durable than silicone, and the workability when inserting it into the tube is also improved. can be done.

On the proximal guide tube 7 side of the protective tube 35, a silicone tube 36 and an irax tube 38 are elastically adhesively fixed to the protective tube 35 with an elastic adhesive 40. On the distal end side, the silicone tube 36 and the irax tube 38 are terminated, and in particular, the irax tube 38 has an end surface that coincides with the protective tube 35. The light guide 37 and the silicone tube 36 and the silicone tube 36 and the protection tube 35 are adhesively fixed with elasticity using an elastic adhesive 40. Thereby, the strength of the portion where the light guide 37 falls apart can be maintained. Further, in the image guide 39, only the irradiation tube 38 and the protection tube 35 are adhesively fixed with elasticity using an elastic adhesive 40, and the image guide 39 is movable with respect to the irradiation tube 38. As a result, when the guide tube 7 or the like is bent, the image guide 39 moves relative to the irradiation tube 38 to absorb the force, and the image guide 39
9 can be prevented from being damaged. On the distal side of the protective tube 35, a light guide 37 is arranged along the outer periphery of the image guide 39 so that the image guide 39 and the light guide 37 are coaxial, and is inserted into the hard part 5. There is. In this way, by covering and protecting the part where the image guide 39 and the light guide 37 are separated in the operation unit 6 with the protective tube 35, assembly work such as insertion into the pipe can be performed efficiently. At the same time, strength can be increased and durability can be improved.

A hard part 5 is connected to the distal end side of the operating part 6, and this hard part 5 is adapted to be inserted into a guide catheter 13 as shown in FIG. The hard part 5 includes a stopper 47 made of an elastic member or a hard member.
48 are provided. These stoppers 47 and 48 come into contact with an O-ring 49 provided within the insertion port 16 of the guide catheter 13. The stopper 4
Since the insertion length and how far the endoscope 1 has been inserted can be determined from the positions of 7 and 48, the operator can grasp the position of the distal end and the insertion state. Moreover, the O-ring 49 is
It has a function of enabling the rigid part 5 to rotate and a function of preventing liquid leakage when feeding physiological saline or the like.

[0018] On the distal end side of the hard part 5, there is an intermediate soft part 4;
A flexible portion 3 and a tip portion 2 are provided. Tip part 2
As shown in FIG. 9, an objective optical system 41, an image guide 39, and a light guide 37 are arranged. The image guide 39 is covered with a coating 42 such as a silicone primary coat, and is inserted through to the tip 2. (The above-mentioned Ilux tube 38 is designed to cover the coating 42.) A lens frame 43 is provided at the distal end portion 2, and an objective optical system 41 is disposed on the distal end side of the lens frame 43. . An image guide 39 is inserted into the rear end side of the lens frame 43, and the end surface of the image guide 39 is arranged at the imaging position of the objective optical system 41. The image guide 39
The coating 42 is peeled off at the tip, and the lens frame 43 is adhesively fixed to the lens frame 43 with an adhesive 44. Thereby, the image guide 39 can be reliably fixed to the lens frame 43, and it is possible to prevent the image guide 39 from coming off when the flexible portion 3 is curved. Further, a light guide 37 is provided along the outer periphery of the image guide 39 and the lens frame 43, and the end surface of the light guide 37 is provided at a position set back from the end surface of the objective optical system 41. The outside of the light guide 37 is covered with a jacket tube 45. The concave portion on the tip side of the light guide 37 is filled with adhesive 44 . With such a configuration, it is possible to reduce the diameter without providing an illumination lens or the like and to provide resistance to drugs and the like.

Next, the operation of this embodiment will be explained. As shown in FIGS. 10 and 11, the parent endoscope 51 is inserted into the duodenum 52, and the guide catheter 13 is inserted into the treatment instrument channel from the forceps port 53 of the parent endoscope 51. Then, the endoscope 1 is inserted through the insertion port 16 of the guide catheter 13.
Insert. At this time, as shown in FIG. 2, since the operating section 6 and the gripping section 8 having the observation eyepiece are separated, only the operating section 6 can be held while the gripping section 8 is placed on a bed or the like. and insert it into the guide catheter 13. Thereby, the insertion operation can be performed by two people: the operator who holds the master endoscope 51 and the operator who holds and inserts the endoscope 1. The distal end portion 54 of the guide catheter 13 is raised by a forceps raising portion 55 of the parent endoscope 51.
With the distal end of the endoscope 1 inserted to the front of the forceps raising part 55, the distal end 54 is raised with forceps and inserted into the pancreatic duct 56 while being observed with the master endoscope 51. In addition, the code|symbol 57 is a bile duct, and the code|symbol 58 is a pancreas.

[0020] Here, if the tip 54 is inserted up to the pancreatic tail 59 so that the entire pancreatic duct 56 can be observed, the length L1 from the forceps raised part 55 to the pancreatic tail 59 is approximately 150 mm, so the tip of the endoscope 1 The distal end portion 54 of the guide catheter 13 must protrude 150 mm from the forceps raised portion 55 when the guide catheter 13 is positioned in front of the forceps raised portion 55. That is, in this state, as shown in FIG.
A length L1 is required up to the source. On the other hand, if the rigid part 5 is not partially inserted into the insertion port 16 in the above-mentioned state, the insertion operation will not be easy and there is a risk of damaging the endoscope 1. X needs to be longer than L1. By doing so, it is also possible to insert the endoscope 1 with one hand. In addition, if the rigid part 5 is too long, it becomes difficult to operate, and it is necessary to insert the rigid part 5 from the above-mentioned state to prevent the rigid part 5 from getting inside the forceps port 53 of the parent endoscope 51. If the length from the tip of the rigid part 5 to the forceps mouth 53 in the above state is L2, then the length X of the rigid part 5 satisfies L1<X<L2. By setting the length X of the rigid portion 5 in this manner, operability can be improved.

Next, the rigid part 5 is advanced into the guide catheter 13 from the state shown in FIG. 11, and as shown in FIG. 49. In this state, the distal end 2 of the endoscope 1 is connected to the distal end 54 of the guide catheter 13.
The position is slightly (for example, 2 to 3 mm) retracted from the end surface of. Further, from the state shown in FIG. 12, the hard part 5
is advanced into the guide catheter 13, and as shown in FIG. In this state, the distal end 2 of the endoscope 1 is in a position protruding a little (for example, 2 to 3 mm) from the end surface of the distal end 54 of the guide catheter 13. In this way, a stopper is provided on the hard part 5 so that the distal end 2 is at a desired position, and the distal end 2 is moved forward and backward to perform insertion and observation deep into the pancreatic duct. In order to secure the field of view, the distal end 2 of the endoscope 1 is slightly retracted from the end surface of the distal end 54 of the guide catheter 13 as shown in FIG. Connect a syringe and send water such as physiological saline to wash the area to be examined. When performing the above-mentioned insertion/advancing/retracting operations, the rigid portion 5 is provided at the portion in front of the operating section 6 where the guide catheter 13 is inserted, so that the rigid portion 5 does not bend between the guide catheter 13 and the guide catheter 13. Damage to the endoscope can be prevented.

[0022] Note that the stopper has the required tip portion 2.
(for example, on the same plane as the end surface of the distal end portion 54 of the guide catheter 13, at a position set back by 5 mm, at a position set back by 30 mm, etc.). This results in X
The insertion state of the endoscope 1 can be easily grasped without performing fluoroscopy or the like, and the endoscope 1 can be advanced and retreated to a desired position to secure a visual field and perform an insertion operation.

[0023] Furthermore, as a first modification, the hard part may be provided with a stopper as shown in FIG. The hard part 61 is provided with a stopper 62 having a recess. A concave portion of the stopper 62 is adapted to fit into an O-ring 49 provided in the insertion port 16 of the guide catheter 13, thereby making it possible to grasp the positional relationship of the distal end portions. Note that length measurement can also be performed by providing a plurality of stoppers at equal intervals.

A second modification of the rigid portion is shown in FIG. A stopper 66 made of an elastic member is provided on the hard part 65, and this stopper 66 is connected to the guide catheter 13.
It is adapted to fit into a stopper recess 67 provided in the insertion opening 16 of. This makes it possible to grasp the insertion state of the endoscope 1 in the same manner as described above.

A third modification of the rigid portion is shown in FIG. In the third example, the rigid portion 68 is configured to be detachable. The insertion part of the endoscope is inserted through the cylindrical rigid part 68 provided with the stopper 69 and is screwed into the threaded part 70 provided in the operating part 6, so that the rigid part 68 is pushed toward the distal end of the operating part 6. It is now connected. As described above, since the rigid part 68 is removable, a plurality of rigid parts 68 with different positions of the stoppers 69 are prepared, and the setting of the desired insertion state can be changed by replacing them as necessary. Can be done.

Further, as shown in FIG. 17, it is cylindrical and has a female threaded part 71 on the inside, and is provided with a stopper part 73 that is screwed into a male threaded part 72 provided on the distal end side of the operating part 6. By using the rigid portion 74, the stopper position can be adjusted. Due to variations in the assembly process, the stopper portion may not be positioned in the desired insertion state. Further, there are cases where it is desired to change the setting of the insertion state, and in these cases it is necessary to adjust the stopper position. Therefore, by making the stopper part 73 rotatable with a threaded part, the stopper position can be adjusted, and the stopper part 73 can be accurately inserted so that the desired insertion state is achieved when it comes into contact with the O-ring etc. of the guide catheter. The positional relationship between the endoscope and guide catheter can be set.

Furthermore, as shown in FIG. 18, a mechanism for adjusting the stopper position can be provided in the proximal mouthpiece 75 of the guide catheter. A threaded portion 76 is provided within the proximal mouthpiece portion 75, and an O-ring holding member 77 that holds the O-ring 49 is screwed into this threaded portion 76. O-ring holding member 7
7 is provided with a slotted portion 78, and by rotating this slotted portion 78, the position of the O-ring 49 can be moved back and forth. By making the O-ring holding member 77 movable in this way, the positional relationship between the endoscope and the guide catheter can be adjusted in the same way as described above, and the insertion state can be set accurately.

As described above, the guide catheter 1 in front of the operating section 6 for inserting and advancing/retracting the guide catheter.
By configuring the part to be inserted into 3 with the hard part 5,
There is no bending between the guide catheter 13 and the guide catheter 13 during insertion/advancing/retracting operations, and it is possible to prevent buckling and damage. Furthermore, since the rigid portion 5 moves forward and backward with respect to the guide catheter 13, insertion and forward and backward operations are facilitated, and operability can be improved.

Note that the guide catheter 13 and the endoscope 1
When inserting, an insertion aid 80 as shown in FIG. 19 can also be used. The insertion aid 80 has an elongated cylindrical shape, into which the guide catheter 13 is inserted and the attachment mouthpiece 81 is attached to the mouthpiece of the forceps mouth 53 of the parent endoscope 51. ing. A groove 83 is provided in the main body cylindrical portion 82 in the longitudinal direction, and rubber rubber 84 is attached to both sides of this groove 83.

As shown in FIG. 20, the insertion aid 80 is attached to the forceps port 53 of the parent endoscope 51, and the guide catheter 13 and endoscope 1 are inserted into the treatment instrument channel through the main body cylindrical portion 82. At this time, the convex portion of the water inlet 17 of the guide catheter 13 engages with the groove 83. Then, by grasping the water supply port 17 and moving the guide catheter 13 along the groove 83, the guide catheter 13 and the endoscope 1 are inserted and moved back and forth. Further, by grasping only the endoscope 1 and moving it forward and backward, the distal end of the endoscope 1 can be made to protrude or retreat from the end surface of the distal end of the guide catheter 13. At this time, since a rubber rubber 84 is provided in the groove 83 that engages with the water supply port 17 of the guide catheter 13, even if only the endoscope 1 is advanced or retreated, the guide catheter 13 is moved by the frictional force with the rubber rubber 84. Don't move. In this way, by using the insertion aid 80, a single operator who holds and operates the master endoscope 51 can insert the guide catheter and the slave endoscope, and can prevent damage. Insertion and forward/backward operations can be performed easily and safely.

FIG. 21 is an explanatory diagram showing the structure of an endoscope and guide catheter according to a second embodiment of the present invention.

As shown in FIG. 21, the endoscope 91 is provided with an operating section 92 that also serves as a grip section on the proximal side. An eyepiece section 9 is provided on the rear end side of the operation section 92 . Also,
A hard part 93 is connected to the front of the operating part 92, and a bend stop 94 made of an elastic member such as rubber is provided on the tip side of the hard part 93. On the distal end side of the bend stopper 94, a flexible portion 3 and a distal end portion 2 are connected in series, as in the first embodiment.

The endoscope 91 is inserted through the guide catheter 101 up to the rigid portion 93, and the insertion and advancement/retraction operations are performed in the same manner as in the first embodiment. The hard part 93 is inserted into the proximal mouthpiece 102 of the guide catheter 101 and is inserted into the proximal mouthpiece 102 of the guide catheter 101.
Advance and retreat within 02. At this time, the stopper recess 95 provided in the hard part 93 is inserted into the O-ring 1 in the proximal mouth part 102.
03, and the guide catheter 1
The distal end of the endoscope 91 is made to protrude or retreat to a desired position with respect to the end face of the distal end of the endoscope 01, or to be flush with the end face of the distal end of the endoscope 91. In this way, the endoscope 91 is inserted and moved back and forth until it reaches the site to be examined for observation.

As described above, by configuring the portion in front of the operating portion 92 through which the guide catheter 101 is inserted with the rigid portion 93, no bending occurs between the guide catheter 101 and the guide catheter 101 during insertion and advancement/retraction operations. , it is possible to prevent buckling and damage, and to easily and safely perform insertion/advancing/retracting operations.

[0035]

As explained above, according to the present invention, there is provided an operation section for inserting the insertion section into the guide tube and moving it forward and backward; By making at least the operating portion side of the portion rigid, it is possible to prevent breakage without buckling on the proximal side of the insertion portion, and it is possible to easily and safely perform insertion/advancing/retracting operations.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing the overall configuration of an endoscope according to a first embodiment of the present invention.

[Fig. 2] An explanatory diagram showing the relationship between the operating section and the gripping section of the endoscope in Fig. 1.

[Fig. 3] Explanatory diagram showing the configuration of the guide catheter

[Figure 4]
A partially cutaway sectional view showing the configuration of the gripping part of the endoscope in Figure 1.

[Fig. 5] Cross-sectional view taken along line A-A' in Fig. 4

[Fig. 6] Partially cutaway sectional view showing details of section B in Fig. 4

[
FIG. 7 is a partially cutaway cross-sectional view showing how the guide catheter is inserted into the operating section and rigid section of the endoscope in FIG. 1;

[Fig. 8] An explanatory diagram showing the arrangement state of the light guide and image guide in the operation section of Fig. 7.

[FIG. 9] A cross-sectional view showing the configuration of the distal end of the endoscope in FIG. 1.

[Figure 10] Explanatory diagram showing the relationship between the endoscope and the pancreas and bile ducts

[Figure 11
】Explanatory diagram showing the length relationship of the rigid part and the guide catheter

[Fig. 12] An explanatory diagram showing a state in which the endoscope is inserted into the guide catheter to the first stopper position.

FIG. 13 is an explanatory diagram showing a state in which the endoscope is inserted into the guide catheter to the second stopper position.

FIG. 14 is an explanatory diagram showing a first modification example of the hard part.

[Figure 15
]Explanatory diagram showing a second modification of the rigid part

FIG. 16 is an explanatory diagram showing a third modification example of the hard part

[Fig. 17] Cross-sectional view showing an example of a rigid part whose stopper position can be adjusted

FIG. 18 is a cross-sectional view showing an example of a guide catheter with adjustable stopper position.

[Fig. 19] Explanatory diagram showing the configuration of the insertion aid

FIG. 20 is an explanatory diagram showing a state in which the insertion aid shown in FIG. 19 is attached to the forceps mouthpiece of the master endoscope.

FIG. 21 is an explanatory diagram showing the configuration of an endoscope and a guide catheter according to a second embodiment of the present invention.

[Explanation of symbols]

1...Endoscope 2...Tip 3...Soft part 4…Intermediate soft part 5...Hard part 6...Operation unit 7...Guide tube 8...Gripping part 13...Guide catheter 16...Insertion port 18...Extension part 51... Parent endoscope 53...forceps mouth

Claims (1)

[Claims] 1. An endoscope in which an insertion section is inserted into a treatment instrument channel of a parent endoscope using a guide tube, and the insertion section is inserted into a test site through the treatment instrument channel for observation. An operating section is provided for inserting and advancing/retracting the guide tube into the guide tube, and at least the operating section side of the insertion site located in front of the operating section and inserted through the guide tube is made rigid. Endoscope.