WO2020090044A1

WO2020090044A1 - Treatment instrument

Info

Publication number: WO2020090044A1
Application number: PCT/JP2018/040543
Authority: WO
Inventors: 真梨子田名部
Original assignee: オリンパス株式会社
Priority date: 2018-10-31
Filing date: 2018-10-31
Publication date: 2020-05-07

Abstract

A treatment instrument 2 is provided with: a first jaw 12; a second jaw 10 that can be opened and closed relative to the first jaw 12; and a grasping member 11 which is attached to the second jaw 10 so as to be rotatable about a first rotation axis Rx1 and which grasps a biological tissue between the grasping member 11 and the first jaw 12. The first rotation axis Rx1 intersects the width direction (the direction along the Y axis) and the thickness direction (the direction along the Z axis) of the grasping member 11.

Description

Treatment tool

The present invention relates to a treatment tool.

BACKGROUND ART Conventionally, there is known a treatment tool that treats a target site by applying energy to the site (hereinafter, referred to as a target site) to be treated in a biological tissue (for example, see Patent Document 1).
The treatment tool described in Patent Document 1 includes a first jaw (gripper piece) and a second jaw (gripper piece) that opens and closes with respect to the first jaw by rotating around a shaft center of a gripper shaft. And a gripping member (electrode portion) that is rotatably attached to the second jaw about a rotation axis that is parallel to the axis of the gripper shaft and that grips the target site with the first jaw. With. Then, in the treatment tool, a high-frequency current is supplied between the first jaw and the grip member to treat the target portion gripped between the first jaw and the grip member.

JP, 2011-206265, A

However, depending on the target site, the thickness dimension may be non-uniform in the width direction of the gripping member (direction parallel to the axis of the gripper shaft). When a target portion having such an uneven thickness dimension in the width direction is gripped by the first jaw and the gripping member described in Patent Document 1, the portion having a large thickness dimension is the same as the first jaw. It comes into close contact with the grip member. On the other hand, the portion having a small thickness dimension is separated from the first jaw or the grip member. That is, in the target portion, the high frequency current can be effectively passed to the portion having the large thickness dimension, but the high frequency current cannot be effectively passed to the portion having the small thickness dimension. As a result, there is a problem in that the treatment range in the width direction of the target site is narrowed and the target site cannot be treated appropriately.

The present invention has been made in view of the above, and an object of the present invention is to provide a treatment tool that can appropriately treat even a living tissue having a non-uniform thickness dimension in the width direction.

In order to solve the above-mentioned problems and achieve an object, a treatment tool according to the present invention includes a first jaw, a second jaw that can be opened and closed relative to the first jaw, and the first jaw. And a gripping member that is rotatably attached to the second jaw about the first rotation shaft and that grips the biological tissue with the first jaw, the first rotation shaft. Intersect with the width direction and the thickness direction of the grip member, respectively.

The treatment tool according to the present invention includes a first jaw, a second jaw that opens and closes with respect to the first jaw by rotating, and the second jaw with respect to the second jaw. And a gripping member that is swingably mounted in a direction intersecting a rotation surface of the gripping member and that grips a biological tissue between the gripping member and the first jaw.

With the treatment tool according to the present invention, it is possible to appropriately treat even a biological tissue having a non-uniform thickness dimension in the width direction.

FIG. 1 is a diagram showing a treatment system according to the first embodiment. FIG. 2 is a diagram showing a distal end side portion of the treatment tool. FIG. 3 is a diagram showing a distal end side portion of the treatment tool. FIG. 4 is a diagram for explaining the effect of the first embodiment. FIG. 5 is a diagram for explaining the effect of the first embodiment. FIG. 6 is a diagram showing a connecting member according to the second embodiment. FIG. 7 is a diagram showing a connecting member according to the third embodiment.

A mode for carrying out the present invention (hereinafter, an embodiment) will be described below with reference to the drawings. The present invention is not limited to the embodiments described below. Further, in the description of the drawings, the same parts are designated by the same reference numerals.

(Embodiment 1)
[Schematic configuration of treatment system]
FIG. 1 is a diagram showing a schematic configuration of a treatment system 1 according to the first embodiment.
The treatment system 1 treats a target site by applying energy to a site (hereinafter, referred to as a target site) to be treated in a biological tissue. The treatment means, for example, coagulation (sealing) or incision of the target site. As shown in FIG. 1, the treatment system 1 includes a treatment tool 2 and a control device 3.

[Structure of treatment tool]
In the following, in describing the configuration of the treatment instrument 2, XYZ coordinate axes of the X axis, the Y axis, and the Z axis that are orthogonal to each other are used. The X axis is an axis parallel to the central axis Ax (Fig. 1) of the sheath 9. The Y axis is an axis orthogonal to the paper surface of FIG. The Z axis is an axis along the vertical direction in FIG. Further, hereinafter, one side (+ X axis side) along the central axis Ax is described as a tip side Ar1, and the other side (−X axis side) is described as a base side Ar2.
2 and 3 are views showing a portion of the treatment instrument 2 on the distal end side Ar1. Specifically, FIG. 2 is a view of the distal end side Ar1 of the treatment instrument 2 as viewed along the Y axis. FIG. 3 is a view of the distal end side Ar1 of the treatment instrument 2 as viewed from the distal end side Ar1.
The treatment tool 2 is, for example, a medical treatment tool that treats a target site while passing through the abdominal wall. As shown in FIG. 1, the treatment tool 2 includes a handpiece 4 and an ultrasonic transducer 5.

As shown in FIGS. 1 to 3, the handpiece 4 includes a holding case 6 (FIG. 1), a movable handle 7 (FIG. 1), a switch 8 (FIG. 1), and a sheath 9 (FIGS. 1 and 2). A jaw 10, a swing member 11 (FIGS. 2 and 3), and a vibration transmission member 12.
The holding case 6 supports the entire treatment tool 2. As shown in FIG. 1, the holding case 6 has a substantially cylindrical holding case body 61 that is coaxial with the central axis Ax, and extends from the holding case body 61 to the lower side (−Z axis side) in FIG. 1. And a fixed handle 62 that is held by an operator such as an operator.
The movable handle 7 is movably attached to the holding case 6 and receives an opening / closing operation by an operator.

The switch 8 is provided so as to be exposed to the outside of the holding case 6 and receives an output start operation by the operator. Then, the switch 8 outputs an operation signal corresponding to the output start operation to the control device 3 by way of the electric cable C (FIG. 1).
The sheath 9 has a substantially cylindrical shape as a whole. Then, the sheath 9 is attached to the holding case 6 with a part of the proximal end side Ar2 being inserted into the holding case 6. An opening / closing member 91 (FIG. 2) that advances and retreats along the central axis Ax is inserted into the sheath 9 according to an opening / closing operation of the movable handle 7 by an operator.

The jaw 10 corresponds to the second jaw according to the present invention. The jaw 10 is an elongated member extending along the X axis. A portion of the jaw 10 on the base end side Ar2 is pivotally supported about an end of the sheath 9 on the tip end side Ar1 about a third pivot axis Rx3 along the Y axis. Then, the jaw 10 opens and closes with respect to the end portion of the vibration transmitting member 12 on the tip side Ar1 by rotating about the third rotation axis Rx3. Further, in the jaw 10, the portion on the base end side Ar2 is connected to the opening / closing member 91. When the opening / closing member 91 moves to the proximal side Ar2 along the central axis Ax in response to the opening / closing operation of the movable handle 7 by the operator, the jaw 10 moves to the proximal side Ar2 by the opening / closing member 91. It is drawn in and rotates clockwise in FIG. 2 about the third rotation axis Rx3. That is, the jaw 10 opens to the end of the vibration transmitting member 12 on the tip side Ar1. On the other hand, when the opening / closing member 91 moves to the tip side Ar1 along the central axis Ax in response to the opening / closing operation of the movable handle 7 by the operator, the jaw 10 is pushed into the tip side Ar1 by the opening / closing member 91. , And rotates about the third rotation axis Rx3 counterclockwise in FIG. That is, the jaw 10 closes to the end of the vibration transmitting member 12 on the tip side Ar1.

As shown in FIG. 2 or FIG. 3, on the −Z axis side surface of the jaw 10, the tip side Ar1 and the base side Ar2 respectively project toward the −Z axis side and face each other along the X axis. A pair of first bearing portions 101 is provided. A cylindrical first shaft member 102 is bridged between the pair of first bearing portions 101. The central axis of the first shaft member 102 corresponds to the first rotation axis Rx1 (FIG. 3) according to the present invention. The first rotation axis Rx1 intersects the width direction and the thickness direction of the rocking member 11, respectively. Here, the width direction of the swing member 11 is a direction parallel to the third rotation axis Rx3 that is the center of rotation of the jaw 10, and is a direction along the Y axis. Further, the thickness direction of the rocking member 11 means the width direction of the rocking member 11 (direction along the Y-axis) and the longitudinal direction connecting the tip end and the base end of the rocking member 11 (direction along the X-axis). Is a direction orthogonal to, and is a direction along the Z axis. In the first embodiment, the first rotation axis Rx1 is parallel to the longitudinal direction of the rocking member 11 (direction along the X axis).

The swing member 11 corresponds to the grip member according to the present invention. The swing member 11 is a long member extending along the X axis and is attached to the surface of the jaw 10 on the −Z axis side. Then, when the jaw 10 is closed with respect to the end of the vibration transmitting member 12 on the tip side Ar1, the swinging member 11 grips the target portion between the jaw 10 and the end of the tip side Ar1.
Specifically, in the swinging member 11, a bulging portion 111 bulging toward the + Z axis side and extending along the X axis is provided on the + Z axis side surface, as shown in FIG. 2 or FIG. It is provided. The bulging portion 111 is arranged between the pair of first bearing portions 101, and the first shaft member 102 is inserted therethrough. The swing member 11 is rotatably supported on the jaw 10 about the first rotation axis Rx1 by inserting the first shaft member 102 into the bulging portion 111. In other words, the swing member 11 is configured to be swingable with respect to the jaw 10 in a direction intersecting with the rotation surface of the jaw 10 (XZ plane orthogonal to the third rotation axis Rx3). When the swing member 11 rotates about the first rotation axis Rx1, the rotation is restricted by coming into contact with the surface of the jaw 10 on the −Z axis side.

Further, in the swinging member 11, a plurality of first tooth portions 112 and a plurality of second tooth portions 113 (FIG. 3) are provided on the −Z axis side surface as shown in FIG. 2 or 3. Is provided.
The plurality of first tooth portions 112 respectively protrude from the + Y axis side toward the −Z axis side on the −Z axis side surface, and are arranged in parallel along the longitudinal direction of the swing member 11.
The plurality of second tooth portions 113 respectively protrude from the −Y axis side toward the −Z axis side on the −Z axis side surface, and are arranged in parallel along the longitudinal direction of the swinging member 11. .. That is, the plurality of second tooth portions 113 oppose the plurality of first tooth portions 112 along the Y axis.

In the first embodiment, at least a part of each of the sheath 9, the jaw 10, and the swinging member 11 described above is made of a conductive material, and they are electrically connected to each other. The swinging member 11 is electrically connected to the electric cable C by passing through the sheath 9 and the jaw 10.

The vibration transmission member 12 corresponds to the first jaw according to the present invention. The vibration transmitting member 12 is a long member that extends along the X axis. Further, as shown in FIG. 1 or 2, the vibration transmitting member 12 is inserted into the sheath 9 in a state where the end portion on the distal end side Ar1 is exposed to the outside. At this time, the end of the vibration transmitting member 12 on the base end side Ar2 is connected to a BLT (bolt tightened Langevin type vibrator) that constitutes the ultrasonic transducer 5. Then, the vibration transmission member 12 transmits the ultrasonic vibration generated by the BLT from the end portion on the base end side Ar2 to the end portion on the tip end side Ar1. In the first embodiment, the ultrasonic vibration is vertical vibration that vibrates in the longitudinal direction of the vibration transmission member 12 (direction along the central axis Ax (X axis)). At this time, the end portion of the vibration transmitting member 12 on the tip side Ar1 vibrates with a desired amplitude due to the longitudinal vibration of the vibration transmitting member 12.
In the first embodiment, the vibration transmission member 12 described above is made of a conductive material and is electrically connected to the electric cable C.

The ultrasonic transducer 5 is detachably connected to the base side Ar2 of the holding case 6. Although not specifically shown, the ultrasonic transducer 5 includes a BLT that generates ultrasonic vibration in response to supply of AC power.

[Configuration of control device]
The control device 3 executes the following control according to the operation signal output from the switch 8 and input via the electric cable C.
The control device 3 supplies a high frequency current between the swinging member 11 and the end of the vibration transmitting member 12 on the tip side Ar1 by way of the electric cable C, the sheath 9 and the jaw 10. Specifically, a high frequency current flows between the plurality of first and

second tooth portions

112 and 113 and the end portion of the vibration transmitting member 12 on the tip side Ar1. That is, the end portion of the vibration transmitting member 12 on the tip side Ar1 functions as the first electrode portion according to the present invention. Further, the plurality of first and

second tooth portions

112 and 113 have the same potential as each other and are set to a potential different from the end portion of the vibration transmitting member 12 on the tip side Ar1. Functions as an electrode part. Then, a high-frequency current flows in the target portion gripped between the swinging member 11 and the end of the vibration transmitting member 12 on the tip side Ar1. In other words, high frequency energy is applied to the target site.

Further, the control device 3 supplies AC power to the BLT configuring the ultrasonic transducer 5 at substantially the same time as the supply of the high frequency current between the swinging member 11 and the end of the vibration transmitting member 12 on the tip side Ar1. By supplying the ultrasonic wave, ultrasonic vibration is generated in the BLT. Then, ultrasonic vibration is applied from the end portion of the tip side Ar1 to the target portion grasped between the swing member 11 and the end portion of the vibration transmission member 12 on the tip side Ar1. In other words, ultrasonic energy is applied to the target site.
Then, Joule heat is generated in the target portion by the high-frequency current flowing therethrough. Further, frictional heat is generated between the end portion of the tip side Ar1 and the target site due to the longitudinal vibration of the end portion of the vibration transmitting member 12 on the tip side Ar1. As a result, the target site is incised while coagulating.

According to the first embodiment described above, the following effects are achieved.
4 and 5 are diagrams for explaining the effect of the first embodiment. Specifically, FIGS. 4 and 5 are diagrams corresponding to FIG. 3. Further, FIG. 4 shows a case where the swinging member 11 is configured to be unrotatable around the first rotation axis Rx1 unlike the first embodiment. FIG. 5 shows a case where the swinging member 11 is configured to be rotatable about the first rotation axis Rx1 as in the first embodiment.

Here, it is assumed that the target portion LT (FIGS. 4 and 5) having a non-uniform thickness dimension in the width direction (direction along the Y axis) of the swing member 11.
Then, when the target site LT is treated, unlike the first embodiment, when the swing member 11 is configured to be unable to rotate about the first rotation axis Rx1, the following problem occurs. Will occur.
When the target site LT is gripped between the swing member 11 and the end of the vibration transmitting member 12 on the tip side Ar1, as shown in FIG. 4, a site having a large thickness dimension (site on the −Y axis side). Respectively come into close contact with the swing member 11 and the end of the vibration transmitting member 12 on the tip side Ar1. On the other hand, a portion having a small thickness dimension (a portion on the + Y axis side) is separated from the plurality of first tooth portions 112. That is, in the target site LT, a high-frequency current can be effectively flown to a site having a large thickness dimension, and ultrasonic vibrations can be effectively applied. On the other hand, in the target site LT, a high-frequency current cannot be effectively passed to a site having a small thickness dimension, and furthermore, ultrasonic vibration cannot be effectively applied. As a result, there is a problem that the treatment range in the width direction of the target site LT is narrowed, and the target site LT cannot be treated appropriately.

On the other hand, when the target site LT is treated, as in the first embodiment, when the swinging member 11 is configured to be rotatable about the first rotation axis Rx1, the following will be described. Thus, the problems described above can be solved.
When the target portion LT is gripped between the swing member 11 and the end of the vibration transmitting member 12 on the tip side Ar1, the swing member 11 has a width at the target portion LT as shown in FIG. The first rotation axis Rx1 is rotated around the first rotation axis Rx1 in accordance with the uneven thickness dimension in the direction. Specifically, the swinging member 11 rotates in a direction (clockwise in FIG. 5) in which the plurality of first tooth portions 112 approach a portion of the target portion LT having a small thickness dimension. Then, in the target portion LT, both the portion having a large thickness dimension and the portion having a small thickness dimension are in close contact with the swing member 11 and the end portion of the vibration transmitting member 12 on the tip side Ar1. That is, in the target portion LT, a high-frequency current can be effectively passed to both the portion having a large thickness dimension and the portion having a small thickness dimension, and further, ultrasonic vibration can be effectively applied. As a result, the treatment range in the width direction of the target site LT can be set to a desired range, and the target site LT can be appropriately treated.

(Embodiment 2)
Next, the second embodiment will be described.
In the following description, the same components as those in the first embodiment described above are designated by the same reference numerals, and detailed description thereof will be omitted or simplified.
FIG. 6 is a diagram showing the connecting member 13 according to the second embodiment. Note that, in FIG. 6, the jaw 10 and the swinging member 11 are shown by alternate long and short dash lines for convenience of description.
In the above-described first embodiment, the swinging member 11 is configured to be rotatable with respect to the jaw 10 only about the first rotation axis Rx1.
On the other hand, in the second embodiment, the swinging member 11 is connected to the jaw 10 by the connecting member 13 (FIG. 6) with respect to the jaw 10 by rotating the first rotating shaft Rx1 and the second rotating shaft Rx2 (see FIG. 6). It is configured to be rotatable around two rotary shafts 6) and 6).

The connection member 13 is a long member that extends along the X axis, and connects the jaw 10 and the swinging member 11. In the second embodiment, at least a part of the connecting member 13 is made of a conductive material and electrically connects the jaw 10 and the swinging member 11.
As shown in FIG. 6, a bulging portion 131 bulging toward the + Z axis side and extending along the X axis is provided on the + Z axis side surface of the connecting member 13. The bulging portion 131 is arranged between the pair of first bearing portions 101, and the first shaft member 102 is inserted therethrough. The connecting member 13 is pivotally supported on the jaw 10 about the first rotating shaft Rx1 by inserting the first shaft member 102 into the bulging portion 131.

Further, in the connecting member 13, on the surface on the −Z axis side, as shown in FIG. 6, a pair of second bearing portions 132 that respectively protrude toward the −Z axis side and face each other along the Y axis are provided. ing. A columnar second shaft member 133 (FIG. 6) is bridged between the pair of second bearing portions 132. The center axis of the second shaft member 133 corresponds to the second rotation axis Rx2 (FIG. 6) according to the present invention. The second rotation axis Rx2 intersects the longitudinal direction (the direction along the X axis) and the thickness direction (the direction along the Z axis) of the rocking member 11, respectively. In the second embodiment, the second rotation axis Rx2 is parallel to the width direction of the rocking member 11 (direction along the Y axis).

As shown in FIG. 6, the bulging portion 111 of the rocking member 11 according to the second embodiment bulges toward the + Z axis side and extends along the Y axis. The bulging portion 111 is arranged between the pair of second bearing portions 132, and the second shaft member 133 is inserted therethrough. The swing member 11 is rotatably supported on the connection member 13 about the second rotation axis Rx2 by inserting the second shaft member 133 into the bulging portion 111. ..

As described above, in the swing member 11 according to the second embodiment, the connection member 13 centers the two rotary shafts of the first and second rotary shafts Rx1 and Rx2 with respect to the jaw 10. Is configured to be rotatable. When the swing member 11 rotates about the first rotation axis Rx1, the rotation of the swing member 11 is restricted by the connection member 13 contacting the surface of the jaw 10 on the −Z axis side. .. Further, when the swing member 11 rotates about the second rotation axis Rx2, the rotation is restricted by coming into contact with the surface of the connection member 13 on the −Z axis side.

According to the second embodiment described above, the following effects can be obtained in addition to the same effects as the above-described first embodiment.
In the second embodiment, the swinging member 11 is configured to be rotatable about two rotary shafts, that is, the first rotary shaft Rx1 and the second rotary shaft Rx2.
Therefore, even if the target portion has a non-uniform thickness dimension not only in the width direction but also in the longitudinal direction of the swinging member 11, the tip side Ar1 of the swinging member 11 and the vibration transmitting member 12 with respect to the target portion. It is possible to make close contact with the end portions of the two and to treat them appropriately.

(Embodiment 3)
Next, the third embodiment will be described.
In the following description, the same components as those in the first embodiment described above are designated by the same reference numerals, and detailed description thereof will be omitted or simplified.
FIG. 7 is a diagram showing the connecting member 14 according to the third embodiment. Note that, in FIG. 7, the jaw 10 and the swinging member 11 are shown by alternate long and short dash lines for convenience of description.
In the above-described first embodiment, the swinging member 11 is configured to be rotatable with respect to the jaw 10 only about the first rotation axis Rx1.
On the other hand, in the third embodiment, the swinging member 11 is configured to be three-dimensionally rotatable with respect to the jaw 10 by the connecting member 14 (FIG. 7).

The connecting member 14 is a ball joint and connects the jaw 10 and the swinging member 11. In the third embodiment, at least a part of the connecting member 14 is made of a conductive material and electrically connects the jaw 10 and the swinging member 11.
Specifically, the connection member 14 includes a ball stud 141 in which a spherical body 141B is provided at one end of a round bar 141A, and a socket 142 that supports the ball stud 141 while making spherical contact with the spherical body 141B. The other end of the round bar 141A is fixed to the surface of the jaw 10 on the −Z axis side. The jaw 10 according to the third embodiment is not provided with a pair of first bearing portions 101, although a specific illustration is omitted. On the other hand, the socket 142 is fixed to the + Z-axis side surface of the swing member 11. The swinging member 11 according to the third embodiment is not provided with the bulging portion 111, although a specific illustration is omitted.

As described above, the swinging member 11 according to the third embodiment is configured to be three-dimensionally rotatable about the center position of the spherical body 141B with respect to the jaw 10 by the connecting member 14. Here, in the three-dimensional rotation, the rotation about the first rotation axis that intersects the width direction and the thickness direction of the rocking member 11, and the longitudinal direction of the rocking member 11 The rotation about the second rotation axis that intersects with the thickness direction is included. When the swinging member 11 rotates three-dimensionally around the center position of the spherical body 141B, the swinging member 11 comes into contact with the surface of the jaw 10 on the −Z axis side to restrict the rotation.

According to the third embodiment described above, the following effects can be obtained in addition to the same effects as the above-described first embodiment.
In the third embodiment, the swinging member 11 is configured to be three-dimensionally rotatable about the center position of the spherical body 141B.
Therefore, even if the target portion has a non-uniform thickness dimension in the XY plane, the swing member 11 and the end of the vibration transmitting member 12 on the tip side Ar1 can be brought into close contact with the target portion. And can be treated appropriately.

(Other embodiments)
So far, the embodiments for carrying out the present invention have been described, but the present invention should not be limited only by the above-described first to third embodiments.
In the first to third embodiments described above, as the configuration of the first and second jaws according to the present invention, the configuration in which the second jaw rotates to open and close with respect to the first jaw (second jaw Is a movable side and the first jaw is a fixed side), but the invention is not limited to this.
For example, by adopting a configuration in which the first jaw rotates to open and close with respect to the second jaw (a one-sided configuration in which the first jaw is the movable side and the second jaw is the fixed side). I don't care.
In addition, for example, a configuration in which both the first and second jaws rotate to open and close (a double-opening configuration in which both the first and second jaws are movable sides) may be adopted. At this time, the gripping member according to the present invention may be attached to both the first and second jaws.

In the above-described first to third embodiments, the treatment tool according to the present invention is configured to apply both ultrasonic energy and high frequency energy to the target site, but is not limited to this, and only high frequency energy is applied. Alternatively, both the high-frequency energy and the heat energy may be applied. Here, "applying heat energy to the target site" means transferring the heat generated in the heater to the target site. At this time, the heater may be provided on at least one of the first jaw and the grip member according to the present invention. Further, the heater may be provided on either the movable side or the fixed side as long as it has the above-mentioned single-opening structure.

1 Treatment System 2 Treatment Tool 3 Control Device 4 Handpiece 5 Ultrasonic Transducer 6 Holding Case 7 Movable Handle 8 Switch 9 Sheath 10 Joe 11 Swing Member 12

Vibration Transmission Member

13, 14 Connection Member 61 Holding Case Body 62 Fixed Handle 91 Opening and Closing Member 101 1st bearing part 102 1st shaft member 111 Bulging part 112 1st tooth part 113 2nd tooth part 131 Bulging part 132 2nd bearing part 133 2nd shaft member 141 Ball stud 141A Round Rod 141B Sphere 142 Socket Ar1 Tip side Ar2 Base end side Ax Central axis C Electric cable LT Target site Rx1 First rotation axis Rx2 Second rotation axis Rx3 Third rotation axis

Claims

First Joe,
A second jaw that can be opened and closed relative to the first jaw;
A gripping member that is rotatably attached to the second jaw about a first rotation axis and that grips a biological tissue with the first jaw,
The first rotation axis is
A treatment tool that intersects the width direction and the thickness direction of the grip member.
The gripping member is
Attached to the second jaw so as to be rotatable about the first rotation shaft and a second rotation shaft different from the first rotation shaft, respectively;
The second rotation axis is
The treatment instrument according to claim 1, wherein the longitudinal direction connecting the distal end and the proximal end of the grip member intersects with the thickness direction.
Further comprising a connecting member connecting the second jaw and the gripping member,
The gripping member is
The treatment tool according to claim 2, wherein the connection member allows the second jaw to rotate about the first rotation shaft and the second rotation shaft, respectively.
The connection member is
The treatment tool according to claim 3, which is a ball joint.
The first jaw is
Comprises a first electrode portion,
The gripping member is
The treatment tool according to claim 1, further comprising a second electrode portion set to a potential different from that of the first electrode portion.
The first jaw is
The treatment tool according to claim 5, which is a vibration transmitting member that applies ultrasonic vibration to the living tissue.
First Joe,
A second jaw that opens and closes with respect to the first jaw by rotating;
A gripping member that is swingably attached to the second jaw in a direction intersecting a rotation surface of the second jaw, and that grips a biological tissue with the first jaw. Ingredient