JP6454563B2 - Surgical instrument aids - Google Patents

Description

  The present invention relates to an auxiliary tool for a surgical treatment tool for assisting an advance / retreat operation of the surgical treatment tool.

  Conventionally, a guide tube inserted through a shaft portion of a treatment instrument such as a puncture needle or forceps so as to be able to advance and retreat is inserted into a patient's abdominal cavity together with a flexible shaft-shaped portion of an endoscope, and tissue collection is performed using the treatment instrument. There are known methods for removing foreign substances, hemostasis, crushed stone, quarrying, and the like.

  When performing such a treatment method, a user may operate an endoscope while holding an operation unit for performing an operation such as photographing an endoscope with one hand. There has been a demand to perform the advance / retreat operation of the treatment instrument while grasping the flexible portion of the endoscope and the shaft portion of the treatment instrument with the other hand.

  Therefore, in order to enable such an operation, there is known a method of attaching an auxiliary tool for a surgical treatment tool for assisting the advancement / retraction of the treatment tool to a portion gripped by the user of the flexible portion of the endoscope. (For example, refer to Patent Document 1).

  A conventional surgical instrument auxiliary tool is connected to an end portion of a guide tube, a window portion extending along an axial direction is formed, and a cylindrical main body fixed to a flexible portion of an endoscope, and a window portion And a first fixture and a second fixture provided so as to be slidable along.

  The first fixture and the second fixture can be independently moved along the window when the relative distance is greater than a predetermined distance. On the other hand, when the relative distance between the first fixing tool and the second fixing tool is equal to or less than a predetermined distance, the first fixing tool is pressed against and fixed to the treatment tool by the second fixing tool. And the second fixing tool and the treatment tool can be integrally moved along the window.

  Therefore, the conventional auxiliary tool for a surgical treatment tool can be used by arbitrarily performing the first fixing tool and the second fixing tool by simply performing a simple operation of reducing the relative distance between the first fixing tool and the second fixing tool. It can be fixed to the shaft part of the treatment tool at the place. Further, in the fixed state, the treatment tool can be advanced and retracted with a simple operation of moving the first fixing tool and the second fixing tool. Any of these operations can be performed by the user with one hand while holding the flexible portion of the endoscope.

International Publication No. 2013/065509

  However, the surgical instrument auxiliary tool described in Patent Document 1 is provided with the first and second fixing tools when the first fixing tool and the second fixing tool are fixed to the shaft portion of the treatment tool and then moved. When a large force is applied only to one of the two fixing tools, the first fixing tool, the second fixing tool, and the treatment tool may be unfixed.

  This invention is made in view of the above point, and provides the auxiliary tool for surgical treatment tools which can perform fixation and cancellation | release of a fixing tool and a treatment tool reliably by simple operation. Objective.

  In order to achieve the above object, an auxiliary tool for a surgical treatment instrument according to the present invention is connected to an end portion of a guide tube through which a shaft portion of a surgical treatment instrument is inserted so as to be able to advance and retract, and extends along an axial direction. And a first fixing tool and a second fixing tool slidably provided along the window. The first fixing tool has a holding part for holding the shaft part. The second fixture has a press contact portion that presses and fixes the clamping portion to the shaft so that the clamp portion can be released when the relative distance between the first fixture and the second fixture is equal to or less than a predetermined distance. In order to maintain the pressure contact fixing to the shaft portion by the portion, a connecting mechanism for connecting the first fixing tool and the second fixing tool is provided.

  As described above, the surgical instrument auxiliary tool of the present invention includes a coupling mechanism that fixes the relative positions of the fixtures (that is, maintains the pressure fixing of the two fixtures to the shaft portion of the treatment instrument). Therefore, unless the user performs an operation for releasing the connection, the fixation between the fixing tool and the shaft portion of the treatment tool is not released. Moreover, a connection mechanism will be in a connection state only by simple operation of making the relative distance of fixing tools small. Therefore, according to the auxiliary tool for a surgical treatment instrument of the present invention, the fixing tool and the treatment instrument can be reliably fixed by a simple operation.

  In the surgical instrument auxiliary tool of the present invention, the coupling mechanism includes a first engagement portion provided on one of the first fixing tool and the second fixing tool, the first fixing tool, and the second fixing tool. A second engagement portion that is rotatably provided on the other of the first engagement portion and engages with the first engagement portion, and the first engagement portion and the second engagement portion are rotated by the rotation of the second engagement portion. It is preferable that the engagement with is released.

  Thus, if it is made the structure which can cancel | release the connection state (engagement state) of a connection mechanism by rotation of the 2nd engaging part which is one of the members which comprise a connection mechanism, operation which a user will perform further will be carried out. It can be simplified.

  Further, in the surgical instrument auxiliary tool of the present invention, when the connection state of the connection mechanism can be released by rotation, the end portion of the second engagement portion on the side away from the first engagement portion side. Is one of the first fixture and the second fixture such that the end of the second engagement portion on the first engagement portion side is away from the main body toward the side opposite to the main assembly side of the second engagement portion. And a groove extending along the rotation direction of the second engagement portion is provided on a side surface that intersects with the rotation axis of the second engagement portion. Claws that engage the edges are preferably provided.

  If the coupling mechanism is configured in this way, the engagement between the fixtures can be released by operating the other end of the first engagement portion to jump up, so that the operation performed by the user is further simplified. Can be a thing.

  In the surgical instrument auxiliary tool of the present invention, the coupling mechanism includes a first engagement portion provided on one of the first fixing tool and the second fixing tool, the first fixing tool, and the second fixing tool. A second engagement portion that engages with the first engagement portion, and the first engagement portion and the second engagement portion are the first engagement portion and the second engagement portion. It is preferable to engage when the relative distance between and becomes below a predetermined distance.

  Thus, if it is set as the structure which can make a connection mechanism into an engagement state only by making small the relative distance of the members which comprise a connection mechanism, operation which a user can perform can be made still easier. .

  In the surgical instrument auxiliary tool of the present invention, the coupling mechanism includes a first engagement portion provided on one of the first fixing tool and the second fixing tool, the first fixing tool, and the second fixing tool. A second engagement portion that engages with the first engagement portion, and the engagement positions of the first engagement portion and the second engagement portion are a plurality of positions in the axial direction of the main body. The clamping portion of the first fixture is a cylindrical elastic member that extends toward the second fixture and through which the shaft portion is inserted. The press contact portion of the second fixture includes the shaft portion and the clamping portion. It is preferable that the inner peripheral surface of the press contact portion is a tapered surface whose diameter increases toward the first fixture side.

  As described above, if the mechanism for fixing the treatment tool and the fixing tool is configured using the tapered surface and the elastic member, the taper surface causes the relative distance between the first fixing tool and the second fixing tool to be reduced. The elastic member is gradually pressed against the shaft portion. Therefore, even when the diameters of the shaft portions of the treatment instrument are different, the treatment instrument and the fixture can be reliably fixed.

  Also, if there are many fixing positions of the fixtures by the coupling mechanism together with this fixing mechanism, the distance that the fixtures can approach is changed due to the difference in the diameter of the treatment tools. In addition, the fixtures can be reliably connected to each other.

The side view of the auxiliary tool for surgical treatment tools which concerns on embodiment of this invention. The top view of the auxiliary tool for surgical treatment tools of FIG. Sectional drawing which shows the shape of the front-end | tip of the insertion part of the endoscope with which the auxiliary tool for surgical treatment tools of FIG. 1 is mounted | worn. FIG. 4A is a side view showing a state in use of the surgical instrument aid of FIG. 1 as a cross section, FIG. 4A is a non-fixed / non-engaged state, FIG. 4B is a fixed / engaged state, and FIG. FIG. 4D shows a state when the fixing is released, and FIG. 4D shows a state when the fixing is released. FIG. 5A is a plan view of the surgical instrument aid of FIG. 1 in use, FIG. 5A is a non-fixed / non-engaged engaged state, FIG. 5B is a fixed / engaged state, and FIG. 5C is a disengaged state. FIG. 5D shows a state when the fixing is released. The enlarged view which shows the engaging groove and nail | claw of the auxiliary tool for surgical treatment tools of FIG. The side view which shows the other usage method of the auxiliary tool for surgical treatment tools of FIG.

  First, with reference to FIGS. 1-3, the whole structure of the auxiliary tool 10 for surgical treatment tools which concerns on this embodiment is demonstrated.

  As shown in FIG. 1, at the end of one end of the cylindrical main body 11 of the surgical instrument auxiliary tool 10, there is an insertion end of the guide tube 20 (the end on the side inserted into the abdominal cavity of the patient). ) Is connected to the opposite end. A finger hook portion 12 is formed on the peripheral surface of the other end side of the main body 11.

  As shown in FIG. 2, two connecting portions 13 for fixing the main body 11 along the axial direction of the soft portion 30 are provided on the side of the main body 11 on the soft portion 30 of the endoscope. ing. The connecting portion 13 is a member having an arc shape in cross section and is locked to the flexible portion 30. However, the shape of the connection part 13 should just be a shape which can be fixed to the soft part 30. FIG. For example, it may be annular.

  The main body 11 extends along the axial direction of the main body 11 (that is, the axial direction of the shaft portion 40a of the treatment instrument 40 (see FIG. 3) inserted through the main body 11 and the guide tube 20 so as to be able to advance and retreat). Is formed. A first fixture 14 and a second fixture 15 are slidably provided in the window portion 11a.

  Here, the distal end portion of the guide tube 20 and the distal end portion of the flexible portion 30 of the endoscope will be described with reference to FIG.

  The distal end portion of the guide tube 20 and the distal end portion of the endoscope flexible portion 30 are inserted into a cylindrical hood 50. A cylindrical positioning member 30a formed of an elastic member is fitted to the distal end portion of the flexible portion 30 of the endoscope. The positioning member 30a fixes the relative position in the hood 50 of the distal end portion of the guide tube 20 and the distal end portion of the flexible portion 30 of the endoscope, and prevents the hood 50 from falling off.

  The shape of the hood 50 is merely an example, and the hood 50 may be any as long as the distal end portion of the guide tube 20 and the distal end portion of the flexible portion 30 of the endoscope can be fixed so as not to move relative to each other. Some endoscopes have an insertion hole for inserting a treatment tool at the tip of a soft part. When using such an endoscope, it is not necessary to use a hood.

  A treatment portion 40b of the treatment tool 40 protrudes from the distal end portion of the guide tube 20. When the user performs an advance / retreat operation of the shaft portion 40a of the treatment instrument 40 with the surgical treatment instrument auxiliary tool 10, the treatment section 40b moves in the axial direction with respect to the hood 50.

  Next, with reference to FIGS. 4-6, the connection mechanism with which the surgical instrument auxiliary tool 10 is provided is demonstrated. The coupling mechanism includes a first fixing tool 14 and a second fixing tool 15.

  As shown in FIG. 4A, the first fixing tool 14 includes a first base portion 14 a through which the shaft portion 40 a of the treatment tool 40 is inserted and slidably attached to the window portion 11 a of the main body 11. A cylindrical sandwiching portion 14b extending from the first base portion 14a toward the second fixture 15 and a first engagement portion 14c extending from the first base portion 14a toward the second fixture 15 outside the main body 11 are provided. Have.

  The clamping part 14b is a cylindrical member formed of an elastic material and having a cut (see FIG. 2) along the axial direction. The shaft portion 40a of the treatment instrument 40 is inserted through the inside. The clamping part 14b fixes the 1st fixing tool 14 and the 2nd fixing tool 15 to the shaft part 40a in cooperation with the cyclic | annular 2nd base | substrate part 15a of the 2nd fixing tool mentioned later. In addition, in this embodiment, although the clamping part 14b was formed as a cylindrical member, what is necessary is just a shape which can clamp the shaft part 40a.

  As shown in FIG. 5A, the first engagement portion 14c is configured as a pair of members that extend from both side surfaces of the first base portion 14a to the second fixture 15 side by a flexible material such as synthetic resin. Yes. A claw 14c1 is formed at the tip of the first engagement portion 14c inward. The claw 14c1 engages with the edge of the groove 15b1 of the second engaging portion 15b of the second fixture described later.

  As shown in FIG. 4A, the second fixing tool 15 includes a second base part 15 a through which the shaft part 40 a of the treatment tool 40 is inserted and slidably attached to the window part 11 a of the main body 11. It has the 2nd engaging part 15b fixed to the 2nd base | substrate part 15a so that rotation was possible outside 15a.

  The second base portion 15a (pressure contact portion) is formed as an annular member having a hole 15a1 through which the shaft portion 40a of the treatment instrument 40 and the clamping portion 14b of the first fixing tool 14 are inserted. The inner peripheral surface of the hole 15a1 is a tapered surface that increases in diameter toward the first fixture 14 side.

  The end of the second engagement portion 15b on the side away from the first engagement portion 14c (the end on the left side in FIG. 4) is the end of the second engagement portion 15b on the first engagement portion 14c side ( The right end in FIG. 4 is away from the main body 11 toward the opposite side (upper side in FIG. 4) to the main body 11 side (lower side in FIG. 4) of the second engaging portion 15b (in FIG. 4C). In the direction of the arrow), the second fixing member 15 is connected to the second base portion 15a so as to be rotatable around the rotation axis P.

  In addition, a large number of grooves 15b1 extending so as to substantially coincide with the rotation direction of the second engagement portion 15b are provided on the side surface of the second engagement portion 15b that intersects the rotation axis P. The groove 15b1 is formed to be engageable with the claw 14c1 of the first fixing tool 14. Therefore, the first fixing tool 14 and the second fixing tool 15 are engaged at a plurality of positions in the axial direction of the main body 11.

  As shown in FIG. 6, the edge of the groove 15b1 is formed in an arc shape only at the corner on the first engagement portion 14c side (right side in FIG. 6). Therefore, when the first fixture 14 and the second fixture 15 approach each other, the claw 14c1 of the first engagement portion 14c of the first fixture 14 gets over the edge of the groove 15b1 while bending. On the other hand, when the 1st fixing tool 14 and the 2nd fixing tool 15 leave | separate, the nail | claw 14c1 and the groove | channel 15b1 engage, and the distance of the 1st fixing tool 14 and the 2nd fixing tool 15 does not change. Fix it.

  Next, referring to FIGS. 4 and 5, the first fixing tool 14 and the second fixing tool 15 and the shaft portion 40 a of the treatment tool 40 are pressed against each other, and the first fixing tool 14 and the second fixing tool 15. The connection (combination) will be described.

  As shown in FIGS. 4A and 5A, when the relative distance is larger than the predetermined distance, the first fixing tool 14 and the second fixing tool 15 slide independently along the window portion 11a of the main body 11. It is possible.

  As shown in FIGS. 4B and 5B, the first fixing tool 14 and the second fixing tool 15 and the shaft portion 40 a of the treatment tool 40 are pressed and fixed, and the first fixing tool 14 and the second fixing tool 15 are connected. When performing, the 1st fixing tool 14 and the 2nd fixing tool 15 are closely approached so that the relative distance may be below a predetermined distance.

  Specifically, for example, when the user holds the little finger and the ring finger on the finger hook (see FIG. 1), the second fixing is performed while the position of the first fixing tool 14 is fixed at the base of the thumb. The tool 15 is moved so as to be pulled toward the first fixing tool 14 with the thumb.

  At this time, the clamping portion 14b of the first fixture 14 is inserted into the hole 15a1 of the second base portion 15a of the second fixture 15. Since the inner peripheral surface of the hole 15a1 is a tapered surface whose diameter increases toward the first fixing tool 14, the tip of the sandwiching portion 14b becomes smaller as the relative distance between the first fixing tool 14 and the second fixing tool 15 becomes smaller. It is pressed against the shaft portion 40a of the treatment instrument 40.

  Therefore, when the relative distance becomes equal to or less than a predetermined distance, the clamping portion 14b is pressed and fixed to the shaft portion 40a of the treatment instrument 40 by the second base portion 15a (that is, the first fixing tool 14 and the second fixing tool 14). The fixing tool 15 and the shaft portion 40a are pressed and fixed. The predetermined distance at which the pressure contact is fixed is determined by the thickness of the clamping portion 14b, the angle of the tapered surface of the hole 15a1, and the diameter of the shaft portion 40a.

  Thus, in the surgical treatment tool auxiliary tool 10 of the present embodiment, the mechanism for fixing the first fixing tool 14 and the second fixing tool 15 and the shaft portion 40a is configured using a tapered surface and an elastic member. Therefore, as the relative distance between the first fixture 14 and the second fixture 15 becomes smaller, the clamping portion 14b, which is an elastic member, is gradually pressed against the shaft portion 40a by the tapered surface of the hole 15a1. Therefore, even when the diameters of the shaft portions 40a are different, the fixing can be surely performed.

  Further, at this time, the claw 14c1 of the first engaging portion 14c of the first fixing tool 14 is made to be the second fixing tool 15 only by reducing the relative distance between the first fixing tool 14 and the second fixing tool 15. Of the plurality of grooves 15b1 provided in the two engaging portions 15b, the first fixing tool 14, the second fixing tool 15, and the shaft portion 40a of the treatment tool 40 are engaged with those corresponding to the positions where they are pressed and fixed. .

  In this state, the movement to increase the relative distance between the first fixing tool 14 and the second fixing tool 15 is prevented by the engagement between the claw 14c1 and the groove 15b1. On the other hand, the movement to reduce the relative distance is prevented by fitting between the holding portion 14b, which is an elastic member of the first fixture 14, and the hole 15a1 whose diameter increases along the axis of the second fixture 15. That is, the relative distance between the first fixture 14 and the second fixture 15 is fixed.

  Even when the position where the first fixing tool 14 and the second fixing tool 15 and the shaft part 40a of the treatment tool 40 are pressure-fixed by using the shaft part 40a having different diameters is different, the claw 14c1. Since there are a large number of grooves 15b1 that are engaged with each other (that is, a large number of engagement positions are provided to correspond to the pressure-fixed positions), the first fixing tool 14 and the second fixing tool 15 Are securely connected.

  After the first fixing tool 14 and the second fixing tool 15 and the shaft portion 40a of the treatment tool 40 are fixed in pressure contact and the first fixing tool 14 and the second fixing tool 15 are connected in this manner, The first fixing tool 14, the second fixing tool 15, and the shaft portion 40a move integrally. That is, by moving the first fixing tool 14 or the second fixing tool 15, the treatment portion 40b of the treatment tool 40 can be advanced and retracted (see FIG. 3).

  As shown in FIGS. 4C and 5C, when the connection between the first fixture 14 and the second fixture 15 is released, the second engaging portion 15b of the second fixture 15 is rotated.

  Specifically, for example, when the user is putting a little finger and a ring finger on the finger hook (see FIG. 1), the end of the second engagement portion 15b on the first engagement portion 14c side is It is rotated around the rotation axis P so as to be flipped up with the thumb.

  When the second engagement portion 15b is thus rotated, the grooves 15b1 formed on both side surfaces of the second engagement portion 15b extend so as to substantially coincide with the rotation direction of the second engagement portion 15b. Therefore, the engagement between the groove 15b1 and the claw 14c1 engaged with the groove 15b1 is released.

  As shown in FIGS. 4D and 5D, when releasing the pressure contact between the first fixing tool 14 and the second fixing tool 15 and the shaft portion 40 a of the treatment tool 40, the first fixing tool 14 and the second fixing tool are used. 15 is moved so that the relative distance becomes larger than a predetermined distance.

  Specifically, for example, when the user holds the little finger and the ring finger on the finger hook (see FIG. 1), the second fixing is performed while the position of the first fixing tool 14 is fixed at the base of the thumb. The tool 15 is moved so as to be pushed out to the first fixing tool 14 with the thumb.

  As described above, the surgical treatment tool auxiliary tool 10 of the present embodiment fixes the relative position between the first fixing tool 14 and the second fixing tool 15 (that is, 1 relative to the shaft portion 40a of the treatment tool 40). Since the connecting mechanism (which maintains the pressure contact and fixing of the fixing tool 14 and the second fixing tool 15) is provided, the first fixing tool 14, the second fixing tool 15, and the treatment are performed unless the user performs an operation of releasing the connection. The fixing of the tool 40 to the shaft portion 40a is not released.

  Further, the connecting mechanism constituted by the first fixing tool 14 and the second fixing tool 15 is brought into a connecting state only by a simple operation of bringing the first fixing tool 14 and the second fixing tool 15 closer to each other. On the other hand, the connection state can be easily released by simply rotating the second engagement portion 15b.

  Therefore, according to the surgical treatment tool auxiliary tool 10 of the present embodiment, the first fixing tool 14, the second fixing tool 15, and the shaft portion 40a of the treatment tool 40 can be fixed and released with a simple operation. Can be done.

  In addition, when the surgical treatment tool auxiliary tool 10 of the present embodiment is used, the first fixing tool 14, the second fixing tool 15, and the shaft portion 40a of the treatment tool 40 can be easily fixed and released. Therefore, it is possible to reduce the burden on the patient to be treated using the surgical instrument auxiliary tool 10. At the same time, it is possible to reduce stress on the user who performs treatment.

  Although the illustrated embodiment has been described above, the present invention is not limited to such a form.

  For example, in the above-described embodiment, the hood 50 is configured to be fitted to the distal end portion of the guide tube 20 and the distal end portion of the flexible portion 30 of the endoscope. However, as shown in FIG. 7, the main body 11 is fixed along the flexible portion 30 extending from the operation portion 31 of the endoscope, and the treatment tool mounting hole 32 provided in the operation portion 31 of the endoscope is fixed. The end of the guide tube 20 opposite to the end connected to the surgical treatment tool auxiliary tool 10 is connected so that the treatment tool 40 is inserted into the flexible portion 30 of the endoscope. May be.

  In the above embodiment, the main body 11 is fixed to the flexible part 30 of the endoscope. However, it is not always necessary to fix the main body 11, and the guide tube is placed in the abdominal cavity of the patient independently of the endoscope. You may make it insert in.

  Moreover, in the said embodiment, the 1st engaging part 14c which has the nail | claw 14c1 is provided in the 1st fixing tool 14, and the 2nd engaging part which has many groove | channels 15b1 engaged with the nail | claw 14c1 in the 2nd fixing tool 15. 15b is rotatably provided.

  However, the coupling mechanism of the present embodiment is not limited as long as it can be engaged. Therefore, it is not always necessary to use a claw and a groove to rotate one when releasing one, and it is known differently. A coupling mechanism may be used. For example, a mechanism using a magnetic material may be used. Further, it may be engaged when it is rotated and disengaged when it is rotated in the opposite direction.

  Further, a second engagement portion may be provided on the first base portion, and the first engagement portion may be provided on the second base portion.

  Further, the plurality of grooves are formed to provide a plurality of fixing positions of the coupling mechanism in accordance with the adoption of a fixing mechanism that can cope with a plurality of types of shaft portions. Therefore, when the diameter of the shaft portion is constant, the coupling mechanism may have only one fixed position.

DESCRIPTION OF SYMBOLS 10 ... Auxiliary tool for surgical treatment tools, 11 ... Main body, 11a ... Window part, 12 ... Finger hook part, 13 ... Connection part, 14 ... 1st fixing tool, 14a ... 1st base | substrate part, 14b ... Clamping part, 14c ... 1st engaging part, 14c1 ... Claw, 15 ... 2nd fixing tool, 15a ... 2nd base | substrate part, 15a1 ... Hole, 15b ... 2nd engaging part, 15b1 ... Groove, 20 ... Guide tube, 30 ... Soft part , 30a ... positioning member, 31 ... operation part, 32 ... treatment tool mounting hole, 40 ... treatment tool, 40a ... shaft part, 40b ... treatment part, 50 ... hood, P ... rotation axis of the second engagement part.

Claims (4)

A cylindrical main body in which a shaft portion of a surgical treatment instrument is connected to an end portion of a guide tube through which the shaft portion of the surgical treatment instrument is inserted so as to freely advance and retract, and a window portion extending in the axial direction is formed;
A first fixture and a second fixture provided slidably along the window,
The first fixture has a sandwiching part that sandwiches the shaft part,
The second fixture includes a press contact portion that presses and fixes the clamping portion to the shaft portion so that the clamp portion can be released when the relative distance between the first fixture and the second fixture is a predetermined distance or less. Have
In an auxiliary tool for a surgical treatment instrument comprising a connection mechanism for connecting the first fixing tool and the second fixing tool in order to maintain press-fixing to the shaft portion by the press-contacting part ,
The connection mechanism is rotatably provided on a first engagement portion provided on one of the first fixing tool and the second fixing tool, and on the other of the first fixing tool and the second fixing tool, A second engaging portion that engages with the first engaging portion;
The surgical instrument aid according to claim 1, wherein the engagement between the first engagement portion and the second engagement portion is released by the rotation of the second engagement portion. It is an auxiliary tool for a surgical treatment instrument according to claim 1 ,
The end portion of the second engagement portion on the side away from the first engagement portion side is the end portion of the second engagement portion on the first engagement portion side, which is the main body of the second engagement portion. The first fixing tool and the second fixing tool are rotatably provided so as to be separated from the main body toward the opposite side to the side,
A groove extending along the rotation direction of the second engagement portion is provided on a side surface that intersects the rotation axis of the second engagement portion,
The auxiliary instrument for a surgical treatment instrument, wherein the first engaging part is provided with a claw that engages with an edge of the groove. It is an auxiliary tool for surgical treatment tools of any one of Claims 1-2 , Comprising:
The connection mechanism is provided on a first engagement portion provided on one of the first fixing tool and the second fixing tool, and on the other of the first fixing tool and the second fixing tool, and the first engagement member. A second engaging portion that engages with the joint portion;
The first engagement portion and the second engagement portion are engaged when a relative distance between the first engagement portion and the second engagement portion is a predetermined distance or less. An auxiliary tool for a surgical treatment instrument. The auxiliary instrument for a surgical treatment instrument according to any one of claims 1 to 3 ,
The connection mechanism is provided on a first engagement portion provided on one of the first fixing tool and the second fixing tool, and on the other of the first fixing tool and the second fixing tool, and the first engagement member. A second engaging portion that engages with the joint portion;
The engagement positions of the first engagement part and the second engagement part are provided at a plurality of positions in the axial direction of the main body,
The clamping portion of the first fixture is a cylindrical elastic member that extends toward the second fixture and through which the shaft portion is inserted.
The pressure contact part of the second fixture is an annular member through which the shaft part and the clamping part are inserted,
An auxiliary tool for a surgical treatment instrument, wherein an inner peripheral surface of the press contact portion is a tapered surface whose diameter is increased toward the first fixture.

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