JPWO2020071378A1 - Endoscopic treatment tools, endoscopic auxiliary tools and endoscopes - Google Patents

Abstract

The endoscopic treatment tool and the endoscopic auxiliary tool can be firmly attached to the endoscope operating portion and easily attached to and detached by a simple configuration.
A flange portion (32) provided at the entrance portion (24) of the treatment tool insertion channel (23) in the endoscope operation unit (11) and formed in a non-circular shape when viewed in the axial direction of the treatment tool insertion channel. The treatment tool operation unit (103) that can be fixed to the mouthpiece (30) having a) has the same shape as the flange portion (32) and the flange portion (32) can be inserted therethrough. With the opening (120) and the flange (32) passing through the opening (120), the treatment tool operation unit (103) of the treatment tool insertion channel (23) with respect to the endoscope operation unit (11). The endoscope is operated with the engaging portion (121) engaging with the flange portion (32) and the engaging portion (121) engaged with the flange portion (32) by being rotated around the central axis. An endoscopic treatment tool (100) having a contact portion (122) that abuts on a seat surface (33) around a mouthpiece (30) in the portion (11).

Description

The present invention relates to a treatment tool for an endoscope, an auxiliary tool for an endoscope, and an endoscope.

The treatment tool for the endoscope inserted into the insertion channel of the flexible endoscope is a treatment tool operated by a caregiver different from the endoscope operator and a treatment operated by the endoscope operator. It is roughly divided into ingredients. As a treatment tool operated by an endoscopic operator, a puncture needle device used in endoscopic ultrasound-guided fine needle aspiration (EUS-FNA) is exemplified. In addition, EUS-FNA is a surgical method of observing the thoracoabdomen with an ultrasonic endoscope from the digestive tract of the stomach, duodenum, etc., and piercing a needle from the digestive tract to collect a tissue sample.

When a treatment tool operated by an endoscope operator is used, the endoscope operation unit is grasped and operated by one hand of the endoscope operator, and the treatment tool operation unit is operated by the endoscope operator. It is gripped and operated by the other hand. In this case, it is desirable that the treatment tool operation unit is fixed to the endoscope operation unit, and the treatment tool operation unit is stabilized via the endoscope operation unit held by one hand of the endoscope operator. Be supported. As a result, the endoscope operator can use the other hand exclusively for operating the treatment tool operation unit.

The puncture needle device for ultrasonic endoscopy described in Patent Document 1 is inserted into a tubular connection portion into which a mouthpiece of an ultrasonic endoscope having a non-circular flange portion is inserted and a tubular connection portion. It is equipped with a lock member that prevents the mouthpiece from coming off. The tubular connecting portion has an insertion restricting portion that comes into contact with a mouthpiece inserted to a predetermined position, and a non-circular flange portion receiving hole into which a non-circular flange portion fits so as not to rotate relative to each other. The lock member is slid in a direction intersecting the insertion / removal direction of the mouthpiece in a state where the mouthpiece is in contact with the insertion restricting portion and the collar portion is fitted in the collar portion receiving hole. As a result, the lock member engages with the collar portion, and the base is prevented from coming off.

The endoscope adapter described in Patent Document 2 connects an endoscope and an endoscopic treatment tool inserted into the conduit of the endoscope, and connects the endoscope to the conduit mouthpiece of the endoscope. Arranged on the same axis, the endoscopic treatment tool has a removable treatment tool fixing base. The endoscope adapter is fixed to the tube mouthpiece of the endoscope, and then the endoscopic treatment tool is fixed to the treatment tool fixing base of the endoscope adapter, so that the endoscopic treatment tool is It is fixed to the endoscope.

Japanese Patent Application Laid-Open No. 2010-269126 Japanese Patent Application Laid-Open No. 2010-94367

In the ultrasonic endoscopic puncture needle device described in Patent Document 1, the movement of the tubular connection portion in the axial direction with respect to the base is restricted by the sliding movement of the lock member. Then, by restricting the movement in the axial direction, the fitting between the collar portion and the flange portion receiving hole is maintained, and thereby the rotation of the tubular connecting portion with respect to the base is restricted. As described above, since the cylindrical connection portion is fixed to the base by the movable lock member, the configuration is complicated and there is a concern that the strength is insufficient.

In the endoscope adapter described in Patent Document 2, it is necessary to attach the endoscope adapter to the conduit mouthpiece of the endoscope in advance before starting to use the endoscopic treatment tool. Further, when a plurality of endoscopic treatment tools are used, for example, when an endoscopic treatment tool that is inappropriate to be combined with an endoscopic adapter due to interference or the like is included, each time. , It is necessary to remove the adapter for the endoscope from the conduit base of the endoscope, which complicates the replacement work.

The present invention has been made in view of the above-mentioned circumstances, and it is possible to firmly attach the endoscopic treatment tool and the endoscopic auxiliary tool to the endoscopic operation unit and easily attach / detach them with a simple configuration. The purpose is to do.

The treatment tool for an endoscope according to one aspect of the present invention is provided at the entrance portion of the treatment tool insertion channel in the endoscope operation unit, and is formed in a non-circular shape when viewed in the axial direction of the treatment tool insertion channel. A treatment tool operating portion that can be fixed to a base having a flange portion is provided, and the treatment tool operating portion has the same shape as the flange portion and has an opening through which the flange portion can be inserted, and the flange portion is the above. When the treatment tool operating portion is rotated around the central axis of the treatment tool insertion channel with respect to the endoscope operating portion while passing through the opening, the engaging portion that engages with the flange portion and the engaging portion. It has a contact portion that abuts on a seat surface around the mouthpiece in the endoscope operating portion in a state where the engaging portion is engaged with the flange portion.

Further, the endoscope assisting tool according to one aspect of the present invention is provided at the entrance portion of the treatment tool insertion channel of the endoscope operation unit, and has a non-circular shape when viewed in the axial direction of the treatment tool insertion channel. The treatment tool operating portion of the endoscopic treatment tool, which has a first end portion that can be fixed to a mouthpiece having a first flange portion formed in the above and a second flange portion that is the same as the first flange portion. Is connected to the second end portion to which the mirror can be fixed, the first end portion and the second end portion, and the treatment tool soft portion extending from the treatment tool operation portion fixed to the second end portion is inserted. The first end portion has the same shape as the first flange portion and has an opening through which the flange portion can be inserted, and the flange portion has passed through the opening. In this state, the first end portion is rotated around the central axis of the treatment tool insertion channel with respect to the endoscope operating portion, so that the engaging portion that engages with the flange portion and the engaging portion engage with the flange portion. It has a contact portion that comes into contact with the seating surface around the mouthpiece in the endoscope operating portion in a state of being engaged with the flange portion.

Further, in the endoscope of one aspect of the present invention, a mouthpiece having a flange portion formed in a non-circular shape when viewed in the axial direction of the treatment tool insertion channel has an inlet of the treatment tool insertion channel in the endoscope operation unit. The treatment tool operating portion of the endoscopic treatment tool or the first end portion of the endoscopic auxiliary tool can be fixed to the mouthpiece.

According to the present invention, the endoscopic treatment tool and the endoscopic auxiliary tool can be firmly attached to the endoscope operating portion and easily attached / detached by a simple configuration.

It is a perspective view of an example of an endoscope for demonstrating the embodiment of this invention. It is a schematic diagram of an example of an endoscope system including the endoscope of FIG. It is an exploded perspective view of an example of the treatment tool for an endoscope for demonstrating the embodiment of this invention. It is a perspective view which shows the usage method of the treatment tool for an endoscope of FIG. It is a perspective view of an example of the mouthpiece of the endoscope of FIG. It is a top view of the base of FIG. FIG. 3 is a plan view of a fixed portion of the endoscopic treatment tool of FIG. 3 with respect to the base. FIG. 7 is a cross-sectional view taken along the line VIII-VIII of the fixed portion of FIG. FIG. 7 is a cross-sectional view taken along line IX-IX of the fixed portion of FIG. It is a schematic diagram of the modification of the fixed part of FIG. It is a perspective view of an example of the auxiliary tool for an endoscope for demonstrating the embodiment of this invention. FIG. 11 is a plan view of the first end portion of the endoscope auxiliary tool of FIG. FIG. 11 is a perspective view of a second end portion of the endoscope auxiliary tool of FIG. It is a schematic diagram of the modification of the auxiliary tool for an endoscope of FIG.

FIG. 1 shows an example of an endoscope for explaining an embodiment of the present invention, and FIG. 2 shows an example of an endoscope system including the endoscope of FIG.

The endoscope system 1 includes an endoscope 2, a light source device 3, a processor unit 4, and a suction pump 5. The endoscope 2 is a flexible mirror, and has an insertion portion 10 to be inserted into the subject, an endoscope operation portion 11 connected to the insertion portion 10, and a universal cord 12 extending from the endoscope operation portion 11. At the end of the universal cord 12, a connector 13 connected to the light source device 3 is provided.

The insertion portion 10 is composed of a tip portion 14, a curved portion 15 connected to the tip portion 14, and a flexible portion 16 connecting the curved portion 15 and the endoscope operating portion 11. An image pickup unit 17 including an image pickup element such as a CCD (Charge Coupled Device) image sensor and a CMOS (Complementary Metal Oxide Semiconductor) image sensor is mounted on the tip portion 14. When the endoscope 2 is an ultrasonic endoscope, the tip portion 14 is equipped with an ultrasonic transducer that transmits and receives ultrasonic waves in place of the imaging unit 17 or in addition to the imaging unit 17. Will be done. The curved portion 15 is configured to be bendable, and the curvature of the curved portion 15 is operated by the endoscope operating unit 11. Further, the flexible portion 16 is configured to be flexible enough to be deformed according to the shape of the insertion path in the subject.

The endoscope operation unit 11 includes an operation button 18A for operating suction using the suction pump 5, an operation knob 18B for operating the curvature of the bending unit 15, an operation button 18C for operating imaging using the imaging unit 17, and the like. It is provided. Further, the endoscope operation unit 11 is provided with an inlet portion 24 of a treatment tool insertion channel 23 through which the treatment tool is inserted.

A light guide 20 and an electric cable 21 are provided inside the insertion unit 10, the endoscope operation unit 11, and the universal cord 12. The light guide 20 guides the illumination light generated by the light source device 3 to the tip portion 14. The electric cable 21 transmits the operating power of the imaging unit 17, the control signal, and the captured image signal between the imaging unit 17 and the processor unit 4. The processor unit 4 generates captured image data from the input captured image signal, displays the generated captured image data on the monitor 6, and records the generated captured image data.

A plurality of operation wires 22 and a treatment tool insertion channel 23 are provided inside the insertion unit 10 and the endoscope operation unit 11. The operation wire 22 reaches the tip portion 14 of the insertion portion 10 from the endoscope operation portion 11, and is pushed toward the tip portion 14 side in response to the operation of the operation knob 18B of the endoscope operation portion 11, or is used for endoscopy. It is pulled toward the mirror operation unit 11. The curved portion 15 of the insertion portion 10 is curved in response to the push and pull of the operation wire 22. The treatment tool insertion channel 23 reaches the tip portion 14 of the insertion portion 10 from the inlet portion 24 provided in the endoscope operation portion 11, and the outlet portion 25 of the treatment tool insertion channel 23 is the tip surface of the tip portion 14. It is open to. The endoscope operation unit 11 is provided with a base 30 for forming an opening of the entrance portion 24 of the treatment tool insertion channel 23, and the treatment tool for an endoscope inserted through the treatment tool insertion channel 23 is a mouthpiece 30. Can be fixed to.

Further, the treatment tool insertion channel 23 joins the suction tube 26 at the endoscope operation unit 11. The suction pipe 26 extends to the connector 13 via a valve 27 opened and closed by the operation button 18A, and is connected to the suction pump 5 via a connection tube 29 connected to a base 28 provided on the connector 13. .. When the valve 27 is opened, a fluid such as blood is sucked into the suction pump 5 through the suction tube 26 from the opening of the outlet portion 25 of the treatment tool insertion channel 23.

3 and 4 show an example of an endoscopic treatment tool for explaining an embodiment of the present invention.

The endoscopic treatment tool 100 shown in FIGS. 3 and 4 is a puncture needle device, which is a puncture needle 101 having a soft shaft portion 110 and a puncture portion 111 connected to the tip of the shaft portion 110, and a puncture needle. A soft sheath 102 through which the 101 is inserted and a treatment tool operating unit 103 for operating the puncture needle 101 are provided. The endoscopic treatment tool 100 is not limited to the puncture needle device, and may be a high-frequency scissors forceps, a high-frequency knife, a bipolar hemostat forceps, a clip, a recovery net, or the like.

The treatment tool operation unit 103 has a main body portion 112 and a handle 113 that is slidably moved with respect to the main body portion 112. The main body 112 guides the puncture needle 101 toward the sheath 102 extending from the tip 114 of the main body 112. The handle 113 detachably holds the puncture needle 101 inserted in the sheath 102.

The sheath 102 is inserted into the treatment tool insertion channel 23 through the opening of the inlet portion 24 of the treatment tool insertion channel 23. The tip of the sheath 102 inserted into the treatment tool insertion channel 23 is arranged so as to project from the tip 14 of the endoscope 2 through the opening of the outlet portion 25 of the treatment tool insertion channel 23.

Under observation using an optical image acquired by the imaging unit 17 of the endoscope 2 and / or an echo image acquired by an ultrasonic transducer, the sheath of the endoscope treatment tool 100 is performed by the endoscope operator. The tip of 102 is arranged at a position facing the inspection site of the subject. Then, the handle 113 is pushed by the endoscope operator. When the handle 113 is pushed in, the puncture portion 111 of the puncture needle 101 protrudes from the tip end portion of the sheath 102 and pierces the inspection site of the subject, and a tissue sample of the inspection site is collected.

In the above operation, the treatment tool operation unit 103 is fixed to the base 30 of the endoscope operation unit 11. As a result, the endoscope operator can exclusively use the hand opposite to the one hand holding the endoscope operating unit 11 to operate the treatment tool operating unit 103.

5 and 6 show a base 30 of the endoscope operation unit 11.

The base 30 has a tubular portion 31 and a flange portion 32 provided so as to project in the radial direction from the outer peripheral surface of the tubular portion 31. The tubular portion 31 is provided so as to project from the endoscope operating portion 11, and a flat seating surface 33 is formed around the tubular portion 31 in the endoscope operating unit 11. The tubular portion 31 communicates with the treatment tool insertion channel 23, and the flange portion 32 is formed in a non-circular shape when viewed in the axial direction of the treatment tool insertion channel 23. In the examples shown in FIGS. 5 and 6, the flange portion 32 is formed in a non-circular shape in which a pair of arcs located on opposite sides of the center of the circle are cut off, but the shape of the flange portion 32 is formed. May be square, rectangular or oval.

7 to 9 show a fixed portion of the treatment tool operating unit 103 with respect to the base 30.

The treatment tool operation unit 103 is fixed to the base 30 by the tip end 114 of the main body 112. The tip 114 of the main body 112 is formed in an annular shape surrounding the periphery of the sheath 102, and the mouthpiece 30 is inserted between the outer peripheral surface of the sheath 102 and the inner peripheral surface of the tip 114. The tip 114 has an opening 120, an engaging portion 121, and an abutting portion 122.

The opening 120 is provided inside the tip 114. The opening 120 is formed in the same shape as the flange 32 of the base 30, and in the examples shown in FIGS. 7 and 8, a pair of arcs located on opposite sides of the center of the circle are cut off. It is formed in a non-circular shape. The opening 120 is formed to be slightly larger than the flange portion 32, and as shown in FIG. 8, the flange portion 32 can be inserted therethrough.

The engaging portion 121 is provided so as to project radially from the inner peripheral surface of the tip portion 114, is formed in a shape excluding the opening 120 from the circle containing the opening 120, and surrounds the outer periphery of the opening 120. I'm out. As shown in FIG. 9, the treatment tool operating portion 103 is rotated around the central axis of the base 30 with respect to the endoscope operating portion 11 in a state where the flange portion 32 has passed through the opening 120, so that the engaging portion is as shown in FIG. 121 engages with the flange portion 32.

The contact portion 122 constitutes the tip surface of the tip portion 114. As shown in FIG. 9, the contact portion 122 is in contact with the seat surface 33 of the endoscope operating portion 11 in a state where the engaging portion 121 is engaged with the flange portion 32. A fixed portion including the engaging portion 121 and the abutting portion 122 is sandwiched between the flange portion 32 and the seat surface 33, whereby the treatment tool operating portion 103 is fixed to the base 30.

The engaging portion 121 and the contact portion 122 are immovable with respect to the tip portion 114, and the configuration is simple. Further, the strength of the engaging portion 121 and the contact portion 122 that are immovable with respect to the tip portion 114 can be easily increased as compared with the movable portion. Therefore, the treatment tool operation unit 103 is firmly attached to the endoscope operation unit 11. Then, the treatment tool operation unit 103 can be easily attached to and detached from the endoscope operation unit 11 simply by rotating the treatment tool operation unit 103.

Preferably, the abutting portion 122 is made of an elastic material, and the abutting portion 122 and the seat surface 33 are in close contact with each other with elastic compression of the abutting portion 122. As a result, the fixing strength and airtightness of the treatment tool operating unit 103 with respect to the base 30 are increased. An elastic member may be provided on the seat surface 33, and in this case as well, the fixing strength and airtightness of the treatment tool operating portion 103 with respect to the base 30 can be enhanced. It should be noted that the seal portion SP (between the outer peripheral surface of the circular flange portion 35 of the base 30 and the inner peripheral surface of the tip portion 114, and the outer peripheral surface of the circular flange portion 36 of the base 30) shown by the alternate long and short dash line in FIG. An elastic member for airtightness may be arranged between the tip portion 114 and the inner peripheral surface of the tip portion 114, and between the tip portion of the base 30 and the bottom portion of the tip portion 114).

Further, the treatment tool operation unit 103 may have a lock portion that prevents the treatment tool operation unit 103 from rotating with respect to the endoscope operation unit 11 in a state where the engagement portion 121 is engaged with the flange portion 32 of the base 30. good. The lock portion 130 shown in FIG. 10 has a flange portion 32 formed in a non-circular shape in which a pair of arcs are cut off, and a lock bar 131 that engages with a long side portion 34 corresponding to the chord of the cut arc. , A spring 132 that urges the lock bar 131. The lock bar 131 has an unlock operation unit 133 so that the endoscope operator can arbitrarily unlock the lock bar 131. The lock bar 131 is not limited to the engagement with the long side portion 34 of the flange portion 32, and for example, a notch or a hole is separately provided in the flange portion 32 or another portion of the base 30, and the lock bar 131 is engaged with the notch or the hole. You may match. Further, the lock portion may be formed by a screw that penetrates the tip portion 114 in the radial direction and comes into contact with the base 30 inserted into the tip portion 114. In any of the configurations, the endoscope operator can arbitrarily switch whether or not the rotation direction is fixed.

11 to 13 show an example of an endoscopic auxiliary tool for explaining an embodiment of the present invention.

The endoscope auxiliary tool 200 shown in FIG. 11 is installed between the endoscope operation unit 11 and the treatment tool operation unit 103, and is arranged so as to project from the tip portion 14 of the endoscope 2 through the treatment tool insertion channel 23. The amount of protrusion of the sheath 102 of the endoscopic treatment tool 100 is adjusted. The endoscope auxiliary tool 200 includes a first end portion 201 that can be fixed to the base 30 of the endoscope operation unit 11, a second end portion 202 to which the treatment tool operation unit 103 can be fixed, and a first end portion 201. And a tubular portion 203 connecting the second end portion 202 and the second end portion 202. The tubular portion 203 is rigid, and a sheath 102 extending from the tip portion 114 of the treatment tool operating portion 103 can be inserted through the tubular portion 203.

The first end portion 201 is configured in the same manner as the tip portion 114 of the treatment tool operating portion 103, and has an opening portion 220, an engaging portion 221 and a contact portion 222 as shown in FIG. The opening 220 is provided inside the annular first end 201. The opening 220 is formed to have the same shape as the flange 32 of the base 30 of the endoscope operating portion 11, and is slightly larger than the flange 32, so that the flange 32 can be inserted. The engaging portion 221 is provided so as to project in the radial direction from the inner peripheral surface of the annular first end portion 201, and surrounds the outer periphery of the opening 220. The engaging portion 221 engages with the flange portion 32 by rotating the first end portion 201 with respect to the endoscope operating portion 11 while the flange portion 32 has passed through the opening 220. Then, in a state where the engaging portion 221 is engaged with the flange portion 32, the contact portion 222 is in contact with the seat surface 33 of the endoscope operating portion 11. A fixed portion including the engaging portion 221 and the abutting portion 222 is sandwiched between the flange portion 32 and the seat surface 33, whereby the first end portion 201 is fixed to the base 30.

The second end portion 202 is configured in the same manner as the base 30 of the endoscope operating portion 11, and has a tubular portion 231 and a flange portion 232 and a seat surface 233 as shown in FIG. The flange portion 232 is the same as the flange portion 32 of the base 30, and can be inserted into the opening 120 of the tip portion 114 of the treatment tool operation portion 103. When the treatment tool operating portion 103 is rotated with respect to the second end portion 202 while the flange portion 232 has passed through the opening 120, the engaging portion 121 of the tip portion 114 of the treatment tool operating portion 103 becomes the flange portion 232. Engage with. Then, in a state where the engaging portion 121 is engaged with the flange portion 232, the contact portion 122 of the tip portion 114 of the treatment tool operating portion 103 is in contact with the seat surface 233 of the second end portion 202. A fixed portion including the engaging portion 121 and the abutting portion 122 is sandwiched between the flange portion 232 and the seat surface 233, whereby the treatment tool operating portion 103 is fixed to the second end portion 202.

For example, when the amount of protrusion of the sheath 102 of the endoscopic treatment tool 100 that is arranged so as to protrude from the tip 14 of the endoscope 2 is reduced, a surplus is generated in the sheath 102. The excess length of the sheath 102 is such that the treatment tool operation unit 103 is separated from the endoscope operation unit 11 and is arranged between the endoscope operation unit 11 and the treatment tool operation unit 103. When there is no endoscope auxiliary tool 200, the sheath 102 arranged between the endoscope operation unit 11 and the treatment tool operation unit 103 bends, so that the treatment tool operation unit 103 hangs down. Therefore, the treatment tool operation unit 103 requires the support of the endoscope operator. On the other hand, according to the endoscopic assisting tool 200, the excess length of the sheath 102 is housed in the rigid tubular portion 203, and the treatment tool operating portion 103 is used for endoscopy via the endoscopic assisting tool 200. It is fixed to the mirror operation unit 11. As a result, the endoscope operator can exclusively use the hand opposite to the one hand holding the endoscope operating unit 11 to operate the treatment tool operating unit 103.

The contact portion 222 of the first end portion 201 may be made of an elastic material. The contact portion 222 and the seat surface 33 are in close contact with each other with elastic compression of the contact portion 222, and the fixing strength of the first end portion 201 to the base 30 is increased. Further, the first end portion 201 may have a lock portion that prevents the first end portion 201 from rotating with respect to the endoscope operating portion 11 in a state where the engaging portion 221 is engaged with the flange portion 32 of the base 30. good. The lock portion of the first end portion 201 may be configured in the same manner as the lock portion 130 shown in FIG.

FIG. 14 shows a modified example of the endoscope auxiliary tool 200, in which the tubular portion 203 is connected to the first tubular member 210 connected to the first end portion 201 and the second end portion 202. It has a two-cylinder member 211. The second cylinder member 211 is fitted to the first cylinder member 210 so as to be able to advance and retreat in the axial direction of the cylinder portion 203 with respect to the first cylinder member 210. The length of the tubular portion 203 becomes variable by moving the second tubular member 211 forward and backward, and the amount of protrusion of the sheath 102 of the endoscope treatment tool 100, which is arranged so as to project from the tip portion 14 of the endoscope 2, is variously changed. can. Further, the second cylinder member 211 is rotatable about the central axis of the cylinder portion 203 with respect to the first cylinder member 210. The rotation of the second tubular member 211 makes the treatment tool operation unit 103 fixed to the second end portion 202 rotatable, so that the operability of the endoscopic treatment tool 100 can be improved. An appropriate friction acts between the first cylinder member 210 and the second cylinder member 211 that are fitted to each other, and the positions of the first cylinder member 210 and the second cylinder member 211 due to this friction. The relationship is maintained and does not require the support of the endoscope operator.

As described above, the endoscopic treatment tool disclosed in the present specification is provided at the entrance portion of the treatment tool insertion channel in the endoscope operation unit, and is viewed in the axial direction of the treatment tool insertion channel. A treatment tool operating portion that can be fixed to a mouthpiece having a flange portion formed in a non-circular shape is provided, and the treatment tool operating portion has the same shape as the flange portion and has an opening through which the flange portion can be inserted. With the flange portion passing through the opening, the treatment tool operating portion is rotated around the central axis of the treatment tool insertion channel with respect to the endoscope operating portion to engage with the flange portion. It has an engaging portion to be engaged and a contact portion that abuts the seating surface around the mouthpiece in the endoscope operating portion in a state where the engaging portion is engaged with the flange portion.

Further, in the endoscopic treatment tool disclosed in the present specification, the tip portion of the contact portion is made of an elastic material.

Further, in the endoscopic treatment tool disclosed in the present specification, the endoscopic operation unit of the treatment tool operation unit is in a state where the treatment tool operation unit is engaged with the flange portion. It has a lock portion that prevents the rotation around the central axis with respect to the above.

Further, the endoscope assisting tool disclosed in the present specification is provided at the entrance portion of the treatment tool insertion channel of the endoscope operation unit, and is non-circular when viewed in the axial direction of the treatment tool insertion channel. The treatment tool operation of the endoscopic treatment tool having a first end portion that can be fixed to a mouthpiece having a first flange portion formed in a shape and a second flange portion that is the same as the first flange portion. The second end portion to which the portion can be fixed, the first end portion and the second end portion are connected, and the treatment tool flexible portion extending from the treatment tool operation portion fixed to the second end portion is formed. The first end portion is provided with a rigid tubular portion that can be inserted, and the first end portion has the same shape as the first flange portion, and the opening through which the first flange portion can be inserted and the first flange portion are described above. An engaging portion that engages with the first flange portion by rotating the first end portion around the central axis of the treatment tool insertion channel with respect to the endoscope operating portion while passing through the opening portion. And, in a state where the engaging portion is engaged with the first flange portion, there is a contact portion that comes into contact with the seating surface around the mouthpiece in the endoscope operating portion.

Further, in the endoscopic auxiliary tool disclosed in the present specification, the tip portion of the contact portion is made of an elastic material.

Further, in the endoscope assisting tool disclosed in the present specification, the endoscope operating portion of the first end portion is in a state where the first end portion is engaged with the flange portion. It has a lock portion that prevents the rotation around the central axis with respect to the above.

Further, in the endoscope assisting tool disclosed in the present specification, the tubular portion is connected to the first tubular portion and the second tubular portion is connected to the second end portion. It has a tubular member, and the second tubular member is fitted to the first tubular member so as to be able to advance and retreat in the axial direction of the tubular portion with respect to the first tubular member.

Further, in the endoscope auxiliary tool disclosed in the present specification, the second cylinder member can rotate about the central axis of the cylinder portion with respect to the first cylinder member.

Further, in the case of an endoscope disclosed in the present specification, a mouthpiece having a flange portion formed in a non-circular shape when viewed in the axial direction of the treatment tool insertion channel is a treatment tool insertion channel in the endoscope operation unit. The treatment tool operating portion of the endoscopic treatment tool or the first end portion of the endoscopic auxiliary tool can be fixed to the mouthpiece.

Although various embodiments have been described above with reference to the drawings, it goes without saying that the present invention is not limited to such examples. It is clear that a person skilled in the art can come up with various modifications or modifications within the scope of the claims, which naturally belong to the technical scope of the present invention. Understood. Further, each component in the above-described embodiment may be arbitrarily combined as long as the gist of the invention is not deviated.

This application is based on a Japanese patent application filed on October 1, 2018 (Japanese Patent Application No. 2018-186974), the contents of which are incorporated herein by reference.

1 Endoscope system 2 Endoscope 3 Light source device 4 Processor unit 5 Suction pump 6 Monitor 10 Insertion part 11 Endoscope operation part 12 Universal cord 13 Connector 14 Tip part 15 Curved part 16 Flexible part 17 Imaging part 18A Operation button 18B Operation knob 18C Operation button 20 Light guide 21 Electric cable 22 Operation wire 23 Treatment tool Insertion channel 24 Inlet part 25 Outlet part 30 Mouthpiece 31 Cylinder part 32 Flange part (first flange part)
33 Seat surface 34 Long side of flange 100 Endoscopic treatment tool 101 Puncture needle 102 Sheath (treatment tool soft part)
103 Treatment tool operation part 110 Shaft part 111 Puncture part 112 Main body part 113 Handle 114 Tip part 120 Opening part 121 Engagement part 122 Contact part 130 Lock part 131 Lock bar 132 Spring 200 Endoscope auxiliary tool 201 1st end part 202 2nd end 203 Cylinder 210 1st cylinder member 211 2nd cylinder member 220 Opening 221 Engagement part 222 Contact part 231 Cylinder part 232 Flange part (2nd flange part)
233 Seat surface SP seal location

Claims (9)

A treatment tool operation that is provided at the entrance of the treatment tool insertion channel in the endoscope operation unit and can be fixed to a mouthpiece having a flange portion formed in a non-circular shape when viewed in the axial direction of the treatment tool insertion channel. With a part
The treatment tool operation unit is
An opening that has the same shape as the flange and through which the flange can be inserted,
With the flange portion passing through the opening, the treatment tool operating portion is rotated around the central axis of the treatment tool insertion channel with respect to the endoscope operating portion to engage with the flange portion. Engagement part and
With the engaging portion engaged with the flange portion, the contact portion that comes into contact with the seating surface around the mouthpiece in the endoscope operating portion and the contact portion.
Treatment tool for endoscopy having. The endoscopic treatment tool according to claim 1.
The tip of the contact portion is an endoscopic treatment tool made of an elastic material. The endoscopic treatment tool according to claim 1 or 2.
The treatment tool operating portion is an endoscope having a locking portion that prevents the treatment tool operating portion from rotating about the central axis with respect to the endoscope operating portion in a state where the engaging portion is engaged with the flange portion. Treatment tool. A first flange that is provided at the entrance of the treatment tool insertion channel of the endoscope operation unit and has a first flange portion that is formed in a non-circular shape when viewed in the axial direction of the treatment tool insertion channel. One end and
A second end portion having the same second flange portion as the first flange portion and to which the treatment tool operating portion of the endoscopic treatment tool according to any one of claims 1 to 3 can be fixed.
A hard tubular portion that connects the first end portion and the second end portion and allows the treatment tool soft portion extending from the treatment tool operation portion fixed to the second end portion to be inserted.
With
The first end is
An opening having the same shape as the first flange portion and through which the first flange portion can be inserted,
The first flange portion is rotated around the central axis of the treatment tool insertion channel with respect to the endoscope operating portion while the first flange portion has passed through the opening. With the engaging part that engages with
With the engaging portion engaged with the first flange portion, a contact portion that comes into contact with the seating surface around the mouthpiece in the endoscope operating portion, and a contact portion.
Auxiliary tool for endoscopes. The endoscopic auxiliary tool according to claim 4.
The tip of the contact portion is an endoscope auxiliary tool made of an elastic material. The endoscopic assistive device according to claim 4 or 5.
The first end portion is an endoscope having a lock portion that prevents the first end portion from rotating about the central axis with respect to the endoscope operating portion in a state where the engaging portion is engaged with the flange portion. Auxiliary tool. The endoscopic auxiliary tool according to any one of claims 4 to 6.
The tubular portion has a first tubular member connected to the first end portion and a second tubular member connected to the second end portion.
The second tubular member is an endoscope auxiliary tool that is fitted to the first tubular member so as to be able to advance and retreat in the axial direction of the tubular portion with respect to the first tubular member. The endoscopic auxiliary tool according to claim 7.
The second tubular member is an endoscope auxiliary tool that can rotate around the central axis of the tubular portion with respect to the first tubular member. A base having a flange portion formed in a non-circular shape when viewed in the axial direction of the treatment tool insertion channel is provided at the entrance portion of the treatment tool insertion channel in the endoscope operation unit, and claims 1 to 3 are provided. The treatment tool operation unit of the endoscopic treatment tool according to any one of the above, or the first end portion of the endoscopic auxiliary tool according to any one of claims 4 to 8 can be fixed to the mouthpiece. Endoscope.

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