JP6210908B2 - Tube body and endoscope system - Google Patents

Description

The present invention relates to a tube body and an endoscope system that can be inserted into and removed from a treatment instrument insertion channel provided in an insertion portion of an endoscope .

  Endoscopes are used in the medical field, industrial field, and the like. Some types of endoscopes are provided with a bending portion on the distal end side of an elongated and flexible insertion portion. In an endoscope having a bending portion, by bending the bending portion, the viewing direction of the observation optical system provided at the distal end portion of the insertion portion can be changed to perform wide-range observation.

The bending portion mainly includes a bending portion set, a bending rubber, and a bending wire.
The bending portion group is configured to be bent in two directions, for example, up and down, or up and down and left and right, by connecting a plurality of bending pieces so as to be rotatable in the longitudinal axis direction. The distal end of the bending wire is fixed at a predetermined position of the distal bending piece located at the forefront of the bending portion group.

  The curved rubber is a cover member, and covers the outer periphery of the elongated curved portion set to constitute the outermost layer of the curved portion. The distal end portion of the curved rubber is fixed to the outer periphery of the distal end rigid member constituting the distal end portion of the insertion portion, and the proximal end portion of the curved rubber is located at the proximal end of the flexible tube portion and the curved portion set. And is fixed to the outer periphery of the coupling base.

In general, the end portion of the curved rubber is firmly fixed while securing watertightness by pincushion bonding including a pincushing operation and a bonding operation.
The thread winding operation is an operation in which a thread is bound to the outer circumferential surface of the curved rubber, the curved rubber is crushed in the inner circumferential direction, and the inner circumferential surface is pressed and fixed to the outer circumferential surface of the distal end hard member or the like. Adhesive work is performed by applying an adhesive to and around the binding part after the bobbin work to achieve water-tightness between the hard member at the tip and the curved rubber, and forming the appearance of the applied adhesive smoothly. It is work to improve.

In Patent Document 1, the contrast medium injection tube is inserted into the treatment instrument insertion channel of the parent scope in a state where the contrast medium injection tube is passed through the outer sheath, and then the contrast medium injection is performed. After pushing forward, the contrast medium injection tube is removed, and the child scope is passed through the mantle tube instead of the contrast medium injection tube, so that the child scope is easily guided to the target site such as the bile duct for endoscopic observation. A parent-child endoscopic device is shown that can.
The insertion portion of the child scope is covered with a flexible tube over the entire length, and a distal end portion main body is connected to the distal end thereof.

  Patent Document 2 discloses an endoscope apparatus in which the insertion depth of a child scope inserted into a forceps channel of the parent scope (the treatment instrument insertion channel of the present invention) can be known and damage to the child scope can be prevented. Has been. A mark corresponding to the insertion depth of the parent scope with respect to the forceps channel is provided on the outer surface of the insertion portion of the child scope of the endoscope apparatus.

Japanese Patent Laid-Open No. 11-42207 JP 2001-346757 A

  However, since the insertion portion of the child endoscope is inserted into the treatment instrument insertion channel of the parent endoscope and then passes through the treatment instrument raising base and is led out of the parent endoscope, The insertion portion of the endoscope contacts the inner surface of the channel and contacts the treatment instrument raising base when the channel is inserted or removed.

  The bobbin adhering part provided in the insertion part of the child endoscope may come into contact with the inner surface of the channel repeatedly, the adhesive part may be peeled off due to repeated contact with the treatment instrument raising base, or the tightly bound thread is cut There is a fear.

  On the other hand, in the bending rubber constituting the bending portion of the child endoscope, the friction generated by contacting the inner surface of the channel causes the insertion property to deteriorate, and the surface of the bending rubber contacts the treatment instrument raising base. As a result, bumps are generated on the curved rubber surface, and the bumps may be deformed into a bowl shape and become enormous parts.

The present invention has been made in view of the above circumstances, and is caused by the fact that the pincushion bonding portion of the child endoscope comes into contact with the channel inner surface or the treatment instrument raising base, and the curved rubber comes into contact with the channel inner surface. An object of the present invention is to provide a tube body and an endoscope system that prevent deterioration of insertability and the like.

The tube body according to one aspect of the present invention is formed into an elongated shape with a flexible resin member, and can be inserted into the treatment instrument insertion channel of the parent endoscope, and the insertion portion of the child endoscope can be inserted and removed. a longitudinal through hole is a tube body provided, said tube body Te state odor inserted into the treatment tool insertion channel of the mother endoscope, the tube body, the tube tip at least in the parent The length is set so as to be disposed further to the distal end side than the treatment instrument raising base provided in the endoscope distal end portion of the endoscope, and is exposed to the outside from the proximal end portion of the treatment instrument insertion channel. in that the tube ends, Ru Tei provided forceps plug to prevent fluid leakage from the interior integrally.
An endoscope system according to an aspect of the present invention is formed into an elongated shape by a parent endoscope that can be inserted and disposed in the duodenum and a flexible resin member, and the treatment tool for the parent endoscope An endoscope system comprising: a tube body that is inserted into an insertion channel; and a child endoscope having an insertion portion that can be inserted into and removed from a longitudinal through hole provided in the tube body, In a state where the tube body is inserted into the treatment instrument insertion channel of the parent endoscope, the tube body has at least a tube distal end portion than a treatment instrument raising base provided in the endoscope distal end portion of the parent endoscope. Further, the length is set so as to be disposed on the distal end side, and a forceps plug for preventing fluid leakage from the inside is integrally formed on the tube end portion exposed to the outside from the proximal end portion of the treatment instrument insertion channel. Provided.

According to the present invention, the trouble that the pincushion bonding portion of the child endoscope comes into contact with the inner surface of the channel or the treatment tool raising base, and the trouble that the curved rubber comes into contact with the inner surface of the channel, such as the deterioration of the insertability. It is possible to prevent the bending rubber from being damaged and to minimize the thickness of the bending rubber. Therefore, it is possible to reduce the diameter of the child endoscope or the treatment tool. A simple tube body and endoscope system can be realized.

The figure explaining the example of 1 structure of the parent-child endoscope apparatus comprised with the tube body of this invention, a child endoscope, and a side-viewing type parent endoscope The figure explaining the structure of the front-end | tip part of a parent endoscope, and the tube body derived | led-out from the front-end | tip part to the exterior The figure mainly explaining the structure of the hand side edge part of the treatment tool penetration channel provided in the parent endoscope. The figure explaining a child endoscope and a tube body The figure explaining the state by which the child endoscope was derived | led-out from the front-end | tip part of the parent endoscope into the duodenum via the tube body. The figure explaining the tube body introduce | transduced in a channel tube via the treatment tool insertion port of a parent endoscope The figure explaining the state which leads out a tube body and a child endoscope in the duodenum in the state which arranged the insertion part of a child endoscope in the tube body The figure explaining other composition of a tube body The figure explaining the tube body which provided the communicating hole which is a through-hole which connects a tube through-hole and the exterior The figure explaining the structure and effect | action which set the distance from the insertion port contact surface of the valve member provided in the hand side edge part of the tube body to the end surface of a treatment tool insertion port to the predetermined distance.

Embodiments of the present invention will be described below with reference to the drawings.
In addition, each drawing used for the following description is shown schematically, and in order to show each component to an extent that can be recognized on the drawing, the dimensional relationship and scale of each member are different for each component. May be shown. Therefore, the present invention is limited only to the illustrated forms, such as the number of components described in these drawings, the shape of the components, the ratio of the sizes of the components, and the relative positional relationship between the components. It is not a thing.

  FIG. 1 shows a parent-child endoscope system 100, which includes, for example, a parent endoscope 101 that is a side-view type endoscope, a child endoscope 1 that is, for example, a biliary endoscope, and a tube body 50. Configured.

Here, in order to distinguish the configuration of the child endoscope 1 and the configuration of the parent endoscope 101 in the description, the child endoscope 1 is also referred to as the first endoscope 1, and the parent endoscope 101 is the first endoscope 1. Also referred to as 2 endoscope 101.
And when the member name or part name which concerns on the structure of the child endoscope 1 and the member name or part name which concerns on the structure of the parent endoscope 101 are the same, about the member name and part name of the parent endoscope 101, “Second” is described to distinguish it from the member name and part name of the same name relating to the configuration of the child endoscope 1.

  A second endoscope 101 shown in FIG. 1 includes an elongated second insertion portion 102, a second operation portion 103 provided continuously with the second insertion portion 102, and a second universal cord extending from the second operation portion 103. 104.

  The second insertion part 102 is orally inserted up to the duodenum (see reference numeral 130 in FIG. 5). The second insertion portion 102, in order from the distal end side, a second distal end portion 111 that is an endoscope distal end portion of the rigid second endoscope 101, a second bendable bending portion 112, and a flexible second bending portion 112. Two flexible tube portions 113 are continuously provided.

  The second bending portion 112 is configured to bend in, for example, four directions, up, down, left, and right. The second operation unit 103 is provided with an up / down bending operation knob 105 and a left / right bending operation knob 106. The second bending portion 112 is configured to bend and move by pulling or loosening a corresponding bending operation wire (see reference numerals 107 and 108 in FIG. 2) or the like in accordance with the operation of the knob 105 or the knob 106.

  As shown in FIGS. 1 and 2, a notch 115 is formed in a part of the outer peripheral side surface 114 of the second tip portion 111. The notch 115 forms an opening of the elevator space 116. A treatment instrument elevator 120 is provided in the elevator space 116.

  The distal end opening of the treatment instrument insertion channel communicates with the elevator stand space 116. The treatment instrument insertion channel is mainly configured by a channel tube 117, a distal end cap 118, and a channel through hole 119.

  The channel tube 117 is a flexible tube body, and is inserted into the second bending portion 112 and the second flexible tube portion 113. The distal end portion of the channel tube 117 is fixed to the distal end cap 118. The tip cap 118 is fixed in the channel through hole 119.

The treatment instrument elevator 120 is a known device that changes the lead-out direction of the tube body 50 guided to the elevator 120 via the treatment instrument insertion channel.
The treatment instrument elevator 120 is operated by operating a treatment instrument elevator operating lever 121 provided in the second operation unit 103 to pull and loosen the elevator operating wire (see reference numeral 123 in FIG. 5), thereby rotating the rotating shaft 122. It is the structure which rotates centering on.

As shown in FIG. 3, the proximal end portion of the channel tube 117 is connected to the distal end side connection port 125 of the endoscope branch tube 124 fixed in the second operation portion 103 by a connecting member. In addition to the distal end side connection port 125, the endoscope branch tube body 124 is provided with a treatment tool cap connection port 126 and a suction tube connection port 127.
The treatment tool base 128 is connected to the treatment tool base connection port 126, and one end portion of the suction pipe 129 is connected to the suction pipe connection port 127.

  A tube body 50 shown in FIG. 4 is an elongated tube made of a fluororesin such as tetrafluoroethylene resin having flexibility, and is provided with a tube through hole 51. The tube through-hole 51 is a through-hole along the longitudinal axis of the tube body 50, that is, a longitudinal-direction through-hole, and the inner diameter thereof is set so that the insertion portion 2 of the first endoscope 1 can be inserted and removed. . On the other hand, the outer diameter of the tube body 50 is set so that it can be inserted into and removed from the treatment instrument insertion channel 117 of the second endoscope 101.

  The length of the tube body 50 is such that the distal end portion 52 of the tube body 50 is more distal than the treatment instrument elevator 120 provided at least in the second distal end portion 111 of the second endoscope 101 as shown in FIG. It is set to be arranged on the side. In other words, as shown in FIG. 1, the distal end surface of the tube body 50 is set to protrude from the notch 115 of the second endoscope 101 by a predetermined amount.

  The tube body 50 is inserted from the treatment instrument insertion port 128m shown in FIG. 3 into the conduit of the treatment instrument base 128 and into the conduit of the branch tube 124 for endoscope, and into the channel tube 117 from the distal end side connection port 125. Then, as shown in FIG. 2, it passes through the tip cap 118 and the channel through-hole 119 and is guided from the tip opening onto the treatment instrument raising base 120 in the raising stand space 116, as shown in FIG. As described above, the tube distal end portion 52 is led out of the second endoscope 101.

The tube body 50 is provided with an index 53. The indicator 53 is, for example, a circumferential colored portion for notifying whether or not the tube tip portion 52 of the tube body 50 is in a state of protruding from the notch 115. The indicator 53 is provided with a predetermined length dimension at a predetermined position on the outer surface of the base end portion that is spaced a predetermined distance from the distal end surface of the tube body 50.
The formation position and formation length of the index 53 are set based on, for example, the anatomical diameter of the duodenum and the diameter and length of the insertion portion 102.

  In the present embodiment, when the distal end side end 53f of the index 53 coincides with the end face of the treatment instrument insertion port 128m, the distal end face of the tube body 50 protrudes from the notch 115 of the second endoscope 101 by a predetermined amount. It will be in the state. The distal end surface of the tube body 50 is located in the duodenum while a part of the index 53 is exposed from the end surface of the treatment instrument insertion port 128m.

  On the other hand, when a part of the tube body 50 exists between the distal end side end 53f of the index 53 and the treatment instrument insertion port 128m, the distal end surface of the tube body 50 is in the second endoscope 101. To position. When the proximal end 53r of the index 53 passes through the treatment instrument insertion port 128m and enters the conduit of the treatment instrument base 128, the distal end surface of the tube body 50 is in the bile duct or in the pancreatic duct. Can be arranged.

The tube body 50 may be made of a fluororesin to which an X-ray contrast agent is added. Further, an X-ray contrast medium chip may be provided at the tube tip portion 52 of the tube body 50.
In addition, a valve member 55 indicated by a broken line that prevents fluid such as body fluid from leaking may be integrally fixed to the proximal end opening side that is the proximal end of the tube body 50.
The valve member 55 has a cylindrical shape and is made of, for example, rubber having predetermined elasticity. The valve member 55 is provided with a slit 56 that functions as a valve. The slit 56 is formed so as to be able to pass through by preventing the fluid from leaking out in the close contact state and pushing the insertion portion 2 of the first endoscope 1 against the elastic force.

As shown in FIG. 1 and FIG. 4, the first endoscope 1 includes an elongated insertion portion 2, an operation portion 3 provided continuously with the insertion portion 2, and a universal cord 4 extending from the operation portion 3. Configured.
The first endoscope 1 is a direct-view type endoscope, and an imaging window (not shown) that constitutes an imaging optical system and an illumination that constitutes an illumination optical system on the distal end surface of the distal end portion 11 that is a distal end rigid portion. A window (not shown) is provided.

The insertion portion 2 is configured by connecting a distal end portion 11, a bending portion 12, and a flexible tube portion 13 in order from the distal end side. An imaging unit or the like is provided in the distal end portion 11.
The bending portion 12 is configured to be bent in two directions, for example, up and down. The operation unit 3 is provided with a bending operation lever 5. The bending portion 12 is configured to bend upward or downward by appropriately operating the lever 5 to pull and relax a bending operation wire (not shown) corresponding to the bending direction.

  The insertion part 2 can be freely inserted into and removed from the tube through hole 51 of the tube body 50 as shown by a two-dot chain line in FIG. And the insertion part 2 is guide | induced to the inside of the body through the tube through-hole 51 of the tube body 50 previously arrange | positioned in the state which has been arrange | positioned in the tube through-hole 51 of the tube body 50, or in the channel tube 117. FIG.

In the present embodiment, the tube body passes through the observation optical system of the second endoscope 101 in a state where the distal end 53f of the index 53 coincides with or is exposed to the end surface of the treatment instrument insertion port 128m. When it is confirmed that the distal end portion 11 of the first endoscope 1 is in a predetermined projecting state from the 50 distal end surfaces, the bending operation lever is in an operating state.
This is because when the bending portion 12 of the first endoscope 1 disposed in the tube body 50 is disposed on the treatment instrument raising base 120, the two-direction bending direction of the bending section 12 and the treatment instrument raising base 120 are arranged. This is to prevent the bending portion 12 from being damaged by the rotation of the elevator 120 when the rotation direction is inconsistent.

Here, the operation of the parent-child endoscope system 100 configured as described above will be described.
For example, when performing an inspection in the bile duct, the operator first places the second distal end portion 111 of the second insertion portion 102 of the second endoscope 101 through the duodenum 130 as shown in FIG.

  Next, the surgeon places the tube body 50 into the channel tube 117 as described above via the treatment instrument insertion port 128m provided in the second operation unit 103 of the second endoscope 101 as shown in FIG. Insert. At this time, the surgeon pays attention to the positional relationship between the index 53 and the end surface of the treatment instrument insertion port 128m as described above, and moves the tube tip 52 of the tube body 50 in the channel tube 117 and the treatment instrument raising base 120. Let the top pass.

  Then, the operator confirms the position of the index 53, confirms the endoscope image of the second endoscope 101, and determines the distal end surface of the tube body 50 from the notch 115 of the second endoscope 101 in advance. Make the amount protruding.

  Next, the operator inserts the insertion portion 2 of the first endoscope 1 into the tube through hole 51 of the tube body 50 disposed in the channel tube 117. The distal end portion 11 and the bending portion 12 of the insertion portion 2 reach the tube distal end portion 52 without directly passing over the treatment instrument raising base 120, and the distal end portion 11 is led out from the distal end surface of the tube body 50 to the outside. . At this time, the surgeon guides the insertion portion 2 into the duodenum 130 while observing the endoscopic image of the first endoscope 1.

Next, the surgeon confirms whether or not the bending operation lever is being operated. Here, if it is confirmed that the bending operation lever is in the operating state, the treatment instrument raising base operation lever 121 is operated to rotate the treatment instrument raising base 120 to move the distal end of the insertion portion 2 as shown in FIG. For example, the bile duct 131 is confronted.
Thereafter, the surgeon inserts the insertion portion 2 into the bile duct 131 and performs an examination or the like. After the inspection is completed, the first endoscope 1 is removed from the channel tube 117.
Reference numeral 132 denotes a pancreatic duct.
As described above, the tube body 50 having elasticity is inserted into the channel tube 117 provided in the second endoscope 101 in advance, and the tube distal end portion 52 is disposed on the distal end side from the treatment instrument raising base 120. And the insertion part 2 of the 1st endoscope 1 is inserted in the tube through-hole 51 of the tube body 50 arrange | positioned in the channel tube 117, and the insertion part 2 is guide | induced in the duodenum 130 which is an observation site | part, for example.

  As a result, the bending portion 12 constituting the insertion portion 2 of the first endoscope 1 can be guided to the observation site on the distal end side from the treatment instrument raising base 120 without directly passing over the treatment instrument raising base 120. Therefore, the trouble which the pincushion adhesion part of the 1st endoscope 1 contacts with a treatment implement raising stand is solved.

  In addition, when inserting the insertion part 2 into the tube through-hole 51, the insertion part 2 can be passed through the tube through-hole 51 more smoothly by applying a lubricant jelly to the outer peripheral surface of the insertion part 2. it can.

  In the above-described embodiment, the tube body 50 is inserted into the channel tube 117 in advance so that the tube distal end portion 52 is disposed on the distal end side from the treatment instrument raising base 120 and then the tube through-hole 51 is inserted. The insertion portion 2 of the first endoscope 1 is inserted into the first endoscope 1 and the insertion portion 2 is led out from the distal end surface of the tube body 50.

  However, the insertion portion 2 is disposed in a predetermined state in the tube through hole 51 of the tube body 50, and the distal end portion 11, the bending portion 12, and a part of the flexible tube portion 13 of the insertion portion 2 are in the tube through hole 51. 7 is inserted into the channel tube 117 of the second endoscope 101 having the second distal end portion 111 disposed in the duodenum 130, and the insertion portion 2 is inserted as shown in FIG. The tube distal end portion 52 of the tube body 50 disposed in the tube through hole 51 may protrude from the notch 115 of the second endoscope 101 by a predetermined amount.

  Thereafter, by inserting the insertion portion 2 in the tube body 50 into the duodenum 130 from the distal end surface of the tube body 50 as described above, the insertion portion 2 can be inserted into the bile duct 131 or the like for inspection.

  As described above, the tube body 50 in which a part of the distal end portion 11, the bending portion 12, and the flexible tube portion 13 of the insertion portion 2 is disposed in the tube through hole 51 is provided in the channel tube 117 of the second endoscope 101. The tube tip 52 of the tube body 50 in which the insertion portion 2 is inserted is led out to the outside of the second endoscope 101, and then the first endoscope 1 is observed from the tip surface of the tube body 50. Derived toward the site.

  As a result, in addition to the same operations and effects as the above-described embodiment, the curved rubber provided in the curved portion 12 constituting the insertion portion 2 of the first endoscope 1 comes into contact with the channel inner surface of the channel tube 117. Therefore, it is possible to solve the problem that the insertability is lowered.

  Note that the tube body 50 may be a tube body 50A in which a treatment surface 58a is provided on the inner surface of the tube through hole 51 as shown in FIG. 8A. According to the tube body 50 </ b> A in which the inner surface of the tube through hole 51 is subjected to hydrophilic lubrication treatment, water or physiological saline or the like is put into the tube through hole 51 before the insertion portion 2 is disposed in the tube through hole 51. By spraying, when the insertion portion 2 is disposed in the tube through hole 51, it can be easily performed without applying lubricating jelly to the outer peripheral surface of the insertion portion 2.

  Further, the tube bodies 50 and 50A may be made of a fluororesin tube body to which an X-ray contrast agent is added, or a tube body 50B in which an X-ray contrast agent chip 57 is provided at the tube tip portion 52B. . According to the tube tip portion 52B containing the X-ray contrast agent, the tip portion introduction position of the tube body 50B introduced into, for example, the bile duct 131 can be confirmed under X-ray observation.

  According to this configuration, for example, the tube distal end portion 52B of the tube body 50B in which a part of the distal end portion 11, the bending portion 12, and the flexible tube portion 13 of the insertion portion 2 are disposed in the tube through hole 51 is replaced with the second end portion 52B. After being led out of the second endoscope 101 via the channel tube 117 or the like of the endoscope 101, the distal end portion of the tube body 50B in a state where the insertion portion 2 is further disposed in the tube through hole 51. 52 is inserted to a desired position in the bile duct 131 under X-ray observation.

  As a result, in addition to the same operations and effects as in the above-described embodiment, the insertion portion 2 of the first endoscope 1 is led out from the distal end surface of the tube body 50B into the bile duct 131 and observed, and the tube body After removing the insertion portion 2 while maintaining the state where the 50B is placed at the desired position in the bile duct 131, a procedure for placing the drainage tube or stent at the desired position in the bile duct 131 through the tube body 50B is performed. It can be carried out.

  The tube bodies 50 </ b> A and 50 </ b> B may be a tube body 50 </ b> C provided with a treatment surface 58 a obtained by performing hydrophilic lubrication treatment on the outer surface and the inner surface of the tube through-hole 51. According to the tube body 50 </ b> C in which the outer surface and the inner surface of the tube through-hole 51 are subjected to hydrophilic lubrication treatment, the insertion portion 2 is arranged before the operation of placing the insertion portion 2 in the tube through-hole 51 and in the tube through-hole 51. Before inserting the provided tube body 50C into the channel tube 117, the insertion portion 2 is disposed in the tube through-hole 51 by spraying water or physiological saline or the like into the tube through-hole 51 or the surface, respectively. The workability can be improved, and the workability of insertion inserted into the channel tube 117 of the tube body 50C in which the insertion portion 2 is disposed in the tube through hole 51 can be improved.

  In addition, in the tube body 50C in which the outer surface and the inner surface of the tube through-hole 51 are subjected to hydrophilic lubrication treatment, as shown in FIG. 9A, the communication is a through-hole that connects the tube through-hole 51 and the outside. A hole 54 is provided to form a tube body 50D.

  According to this configuration, for example, by spraying water on the outer surface of the tube body 50D, the water sprayed on the outer surface reaches the processing surface 58a applied to the outer surface, and through the communication hole 54. It reaches the treated surface 58a applied to the inner surface of the tube through hole 51.

  As a result, both before the work of placing the insertion portion 2 in the tube through hole 51 and the work of inserting the tube body 50B in which the insertion portion 2 is disposed in the tube through hole 51 into the channel tube 117, respectively. The operation of placing the insertion portion 2 in the tube through-hole 51 by spraying water once on the outer surface of the tube body 50D or the inner surface of the tube through-hole 51 without spraying water, and inserting into the tube through-hole 51 The operation of inserting the tube body 50B provided with the portion 2 into the channel tube 117 can be performed continuously.

  The communication hole 54 is a plurality of round holes such as a circle and an ellipse as shown in FIG. 9B, or a plurality of corners such as a triangle, a rectangle and a hexagon as shown in FIG. It is a hole, and a plurality of round holes and square holes are provided, for example, in a spiral shape, a staggered arrangement, or irregularly. The number and size of the communication holes 54 are set as appropriate, and may be mesh-shaped.

  Moreover, the range of the predetermined distance from the front end surface of the tube body 50D is a holeless region. This is to prevent the communication hole 54 from being caught by the treatment instrument elevator 120 when the tube body 50D passes over the treatment instrument elevator 120.

Further, as shown in FIG. 10, the distance from the end surface of the treatment instrument insertion port 128m to the insertion port contact surface 55a of the valve member 55 may be set to a predetermined distance L.
According to this configuration, as shown in FIG. 7, the tube distal end portion 52 of the tube body 50 in which the insertion portion 2 is disposed in the tube through hole 51 is set in a predetermined amount from the notch 115 of the second endoscope 101. After projecting and causing the distal end of the insertion portion 2 to face the bile duct 131, the valve member 55 is moved toward the treatment instrument insertion port 128m, whereby the tube body 50 in which the insertion portion 2 is disposed is placed in the bile duct. 131 can be smoothly guided into the interior.

In the above-described embodiment, the valve member 55 is integrally fixed to the proximal end opening side that is the proximal end of the tube body 50. However, a forceps plug (not shown) is used instead of the valve member 55. May be integrally fixed to the proximal end portion of the tube body 50.
As what is inserted through the tube body 50, a so-called ultrasonic probe having an ultrasonic probe at the tip or a so-called treatment tool having a high-frequency knife at the tip may be used.

  The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the invention.

DESCRIPTION OF SYMBOLS 1 ... Child endoscope (1st endoscope) 2 ... Insertion part 3 ... Operation part 4 ... Universal cord 5 ... Bending operation lever 11 ... Tip part 12 ... Bending part 13 ... Flexible tube part 50, 50A, 50B, 50C, 50D ... Tube body 51 ... Tube through-hole 52, 52B ... Tube tip 53 ... Index 53f ... Tip end side end 53r ... Base end side end 54 ... Communication hole 55 ... Valve member 55a ... Insert port contact surface 56 …slit
57 ... X-ray contrast medium chip 58a ... Processing surface 100 ... Parent-child endoscope system 101 ... Parent endoscope (second endoscope) 102 ... Second insertion part 103 ... Second operation part 104 ... Second universal code 105 ... Up / down bending operation knob
DESCRIPTION OF SYMBOLS 106 ... Left / right bending operation knob 107, 108 ... Bending operation wire 111 ... 2nd front-end | tip part 112 ... 2nd bending part 113 ... 2nd flexible pipe part 114 ... Outer peripheral side 115 ... Notch 116 ... Raising space 117 ... Treatment tool Insertion channel 118 ... Tip base 119 ... Channel through-hole 120 ... Treatment instrument raising base 121 ... Treatment instrument raising base operation lever 122 ... Rotating shaft 123 ... Raising base operation wire 124 ... Endoscope branch tube 125 ... Tip side connection Mouth 126 ... Treatment tool base connection port 127 ... Suction tube connection port 128 ... Treatment tool base 128 m ... Treatment tool insertion port 129 ... Suction tube 130 ... Duodenum 131 ... Bile duct 132 ... Pancreatic duct

Claims (6)

It is formed in a slender shape with a flexible resin member, and can be inserted into the treatment instrument insertion channel of the parent endoscope, and provided with a longitudinal axial through-hole through which the insertion portion of the child endoscope can be inserted and removed. A tube body,
The tube body Te state odor inserted into the treatment tool insertion channel of the mother endoscope,
The tube body is set to a length as to be disposed further frontward than the treatment instrument elevator provided in the endoscope tip portion of the tube distal end is at least mother endoscope, the treatment instrument A tube body, wherein a forceps plug for preventing fluid leakage from the inside is integrally provided at an end of a tube exposed to the outside from a proximal side end of the insertion channel .   The tube body according to claim 1, wherein at least an inner surface of the tube body is subjected to a hydrophilic lubrication treatment.   3. The tube body according to claim 2, wherein a hydrophilic lubrication treatment is performed on the inner surface of the tube body and the outer surface of the tube body, and a through hole is provided through the longitudinal axis direction through hole and the outside. .   Provided on the outer surface of the tube body exposed to the outside from the proximal end portion of the treatment instrument insertion channel is an indicator for notifying the arrangement position of the distal end portion of the tube disposed on the distal end side of the treatment instrument raising base. The tube body according to claim 1.   The tube body according to claim 1, wherein at least a distal end portion of the tube body includes a contrast agent that can be confirmed by X-rays.   A parent endoscope that can be inserted and placed in the duodenum;
  A tube body which is formed into an elongated shape with a flexible resin member and is inserted into the treatment instrument insertion channel of the parent endoscope;
  An endoscope system having a child endoscope having an insertion portion that can be inserted into and removed from a longitudinal axial through-hole provided in the tube body,
  In the state where the tube body is inserted into the treatment instrument insertion channel of the parent endoscope,
  The length of the tube body is set so that the distal end portion of the tube body is disposed further on the distal end side than at least the treatment instrument raising base provided in the endoscope distal end portion of the parent endoscope. An endoscope system, wherein a forceps plug for preventing fluid leakage from the inside is integrally provided at a tube end exposed to the outside from a proximal end of the insertion channel.

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