Ultrasonic treatment tool

Abstract

An ultrasonic treatment tool comprises: an ultrasonic blade 13 that applies ultrasonic vibration and a high-frequency electric current to biological tissue; a jaw 11 that is opened and closed with respect to the ultrasonic blade 13; and a contact member 12 that is provided in the jaw 11, is formed of a first resin material, and is brought into contact with the ultrasonic blade 13 when the jaw 11 is closed with respect to the ultrasonic blade 13. The jaw 11 is at least partially formed of a second resin material, and has an electrode EP that supplies a high-frequency electric current to at least a portion of a contact surface that makes contact with biological tissue.

Description

Ultrasonic Treatment Device

[0001] The present invention relates to an ultrasonic treatment device.

[0002] Conventionally, ultrasonic treatment devices have been known that treat a target area in biological tissue (hereinafter referred to as the target) by supplying ultrasonic vibrations and high-frequency current as treatment energy to the target area (see, for example, Patent Document 1).

[0003] The ultrasonic treatment device described in Patent Document 1 includes an ultrasonic blade, jaws, and abutment member as shown below. The ultrasonic blade supplies ultrasonic vibrations and high-frequency current to the treatment target. The jaws open and close relative to the ultrasonic blade. The jaws are provided with electrodes that supply high-frequency current to the treatment target. The abutment member is made of a resin material and is provided on the jaws. The abutment member abuts against the ultrasonic blade when the jaws are closed relative to the ultrasonic blade.

[0004] US Patent Application Publication No. 2021 / 0196334

[0005] However, in ultrasonic treatment instruments, repeated output of ultrasonic vibrations can cause wear of the contact member. When the contact member wears out in this way, the distance between the ultrasonic blade and the jaw-side electrode becomes smaller, and the ultrasonic blade may come into contact with the electrode. In other words, contact between the ultrasonic blade and the electrode may affect the lifespan of the ultrasonic blade.

[0006] The present invention has been made in view of the above, and has an object to provide an ultrasonic treatment device that can reduce the impact on the life of an ultrasonic blade.

[0007] In order to solve the above-mentioned problems and achieve the object, the ultrasonic treatment device of the present invention comprises an ultrasonic blade that supplies ultrasonic vibrations and high-frequency current to biological tissue, respectively, a jaw that opens and closes relative to the ultrasonic blade, and a contact member that is provided on the jaw and made of a first resin material that contacts the ultrasonic blade when the jaw is closed relative to the ultrasonic blade, and the jaw has an electrode, at least a portion of which is made of a second resin material, that supplies the high-frequency current to at least a portion of the contact surface that contacts the biological tissue.

[0008] According to the ultrasonic treatment device of the present invention, the influence on the life of the ultrasonic blade can be reduced.

[0009] Fig. 1 is a diagram showing a treatment system according to an embodiment. Fig. 2 is a diagram explaining the configuration of a tip portion of an ultrasonic treatment device. Fig. 3 is a diagram explaining the configuration of a tip portion of an ultrasonic treatment device. Fig. 4 is a diagram explaining the configuration of a jaw. Fig. 5 is a diagram explaining a first modification of the embodiment. Fig. 6 is a diagram explaining a second modification of the embodiment.

[0010] Hereinafter, a mode for carrying out the present invention (hereinafter referred to as an embodiment) will be described with reference to the drawings. Note that the present invention is not limited to the embodiment described below. Furthermore, in the description of the drawings, the same parts are given the same reference numerals.

[0011] [Overall Configuration of Treatment System] Fig. 1 is a diagram showing a treatment system 1 according to an embodiment. The treatment system 1 applies treatment energy to a region of biological tissue to be treated (hereinafter referred to as a treatment target), thereby treating the treatment target. The treatment energy in this embodiment is ultrasonic energy and high-frequency energy. Treatments that can be performed by the treatment system 1 according to this embodiment include coagulation (sealing) of the treatment target, incision of the treatment target, and the like. Coagulation and incision may also be performed simultaneously. As shown in Fig. 1, this treatment system 1 includes a treatment tool 2 and a control device 3.

[0012] [Configuration of Treatment Tool] In the following, one side along the central axis Ax1 (FIG. 1) of the outer pipe 10 will be referred to as the distal side Ar1, and the other side will be referred to as the proximal side Ar2. In addition, the "width direction" described below refers to a direction perpendicular to the central axis Ax1 and the opening / closing direction of the jaw 11 relative to the treatment portion 131, and is also a direction perpendicular to the plane of the paper in FIGS. 1 and 2.

[0013] 2 and 3 are diagrams illustrating the configuration of the distal end portion of the treatment tool 2. Specifically, Fig. 2 is a cross-sectional view of the distal end portion of the treatment tool 2 cut along a plane including the central axis Ax1 of the outer pipe 10, with the jaw 11 and the ultrasonic blade 13 included within the plane. Fig. 3 is a cross-sectional view of the distal end portion of the treatment tool 2 cut along a plane perpendicular to the central axis Ax1.

[0014] The treatment tool 2 is an ultrasonic treatment tool according to the present invention. The treatment tool 2 applies ultrasonic energy and high-frequency energy to a treatment target, thereby treating the treatment target. As shown in FIG. 1 , the treatment tool 2 includes a handpiece 4 and an ultrasonic transducer 5.

[0015] As shown in Figures 1 to 3, the handpiece 4 includes a fixed handle 6 (Figure 1), an operating handle 7 (Figure 1), a switch 8 (Figure 1), a rotating knob 9 (Figure 1), an outer pipe 10 (Figures 1 and 2), a jaw 11, an abutment member 12 (Figures 2 and 3), and an ultrasonic blade 13.

[0016] The fixed handle 6 supports the entire treatment tool 2 and is a part that is held by an operator (user) such as a surgeon.

[0017] The operating handle 7 is movably attached to the fixed handle 6 and receives opening and closing operations by an operator such as a surgeon.

[0018] The switch 8 is provided in an exposed state on the outside of the fixed handle 6 and receives treatment operations from an operator such as a surgeon.

[0019] The rotation knob 9 has a generally cylindrical shape coaxial with the central axis Ax1 and is provided on the distal end side Ar1 of the fixed handle 6. The rotation knob 9 is rotated by an operator such as a surgeon. This rotation causes the rotation knob 9 to rotate about the central axis Ax1 relative to the fixed handle 6. Furthermore, the rotation of the rotation knob 9 causes the outer pipe 10, jaw 11, abutment member 12, and ultrasonic blade 13 to rotate about the central axis Ax1.

[0020] The outer pipe 10 has a tubular shape and corresponds to a pipe according to the present invention. In this embodiment, the outer pipe 10 is a cylindrical pipe made of a conductive material such as metal.

[0021] A first pin Pi1 (FIGS. 1 and 2) is fixed to the end of the tip side Ar1 of the outer pipe 10. The first pin Pi1 has a cylindrical shape extending in a direction perpendicular to the plane of the paper in FIGS. 1 and 2, engages with the jaw 11, and rotatably supports the jaw 11. In this embodiment, the first pin Pi1 is made of a conductive material such as metal. The first pin Pi1 corresponds to the pin according to the present invention.

[0022] The outer peripheral surface of the outer pipe 10 is covered with an electrically insulating outer tube TO ( FIG. 2 ). A tubular inner pipe PI ( FIG. 2 ) is inserted into the outer pipe 10 and moves back and forth along the longitudinal direction of the outer pipe 10 in response to an opening or closing operation of the operating handle 7 by an operator such as a surgeon. A second pin Pi2 ( FIG. 2 ) having a cylindrical shape extending in a direction perpendicular to the plane of FIGS. 1 and 2 is fixed to the end of the distal end side Ar1 of the inner pipe PI and engages with the jaw 11. In this embodiment, the second pin Pi2 is located above the first pin Pi1 in FIG. 2 (the side where the jaw body 111 is located relative to the treatment portion 131).

[0023] The jaw 11 is connected to the outer pipe 10 by a first pin Pi1. The jaw 11 is also connected to the inner pipe PI by a second pin Pi2. The jaw 11 rotates about the first pin Pi1 relative to the outer pipe 10 in conjunction with the forward and backward movement of the inner pipe PI in response to an opening and closing operation of the operating handle 7 by an operator such as a surgeon. This causes the jaw 11 to open and close relative to a treatment portion 131, which is the distal end of the ultrasonic blade 13, and enables the jaw 11 to grasp a treatment target between the treatment portion 131 and the jaw 11.

[0024] The treatment tool 2 may be configured as a push-close type or a pull-close type.

[0025] The push-close type has the following configuration: The jaw 11 rotates around the first pin Pi1 in a direction approaching the treatment portion 131 in conjunction with the movement of the inner pipe PI toward the distal end side Ar1. That is, the jaw 11 closes relative to the treatment portion 131. Furthermore, the jaw 11 rotates around the first pin Pi1 in a direction away from the treatment portion 131 in conjunction with the movement of the inner pipe PI toward the proximal end side Ar2. That is, the jaw 11 opens relative to the treatment portion 131.

[0026] The pull-close type has the following configuration: The jaw 11 rotates around the first pin Pi1 in a direction approaching the treatment portion 131 in conjunction with the movement of the inner pipe PI toward the base end side Ar2. That is, the jaw 11 closes relative to the treatment portion 131. Also, the jaw 11 rotates around the first pin Pi1 in a direction away from the treatment portion 131 in conjunction with the movement of the inner pipe PI toward the tip end side Ar1. That is, the jaw 11 opens relative to the treatment portion 131.

[0027] The jaw 11 is also provided with an electrode EP and first and second conductive surfaces CS1 and CS2 (see FIG. 4).

[0028] The detailed configuration of the jaw 11 will be described later in the section "Configuration of the jaw." The configurations of the electrode EP and the first and second conductive surfaces CS1 and CS2 will be described later in the section "Configuration of the electrode and the first and second conductive surfaces."

[0029] The abutment member 12 is made of a first resin material, such as polytetrafluoroethylene (PTFE), that is electrically insulating and biocompatible, and has a generally rectangular parallelepiped shape extending along the longitudinal direction of the jaw 11. As shown in Figures 2 and 3, the abutment member 12 is fixed to the surface of the jaw body 111 facing the treatment portion 131, and abuts against the treatment portion 131 when the jaw 11 is closed over the treatment portion 131. The abutment member 12 has the function of preventing the ultrasonically vibrating treatment portion 131 from colliding with the jaw 11 and being damaged when the incision of the treatment target by ultrasonic vibration is completed.

[0030] The ultrasonic blade 13 is made of a conductive material and has an elongated shape extending along the central axis Ax1. As shown in FIG. 2 , the ultrasonic blade 13 is inserted into the inner pipe PI with the treatment portion 131 protruding to the outside. At this time, the end of the proximal side Ar2 of the ultrasonic blade 13 is mechanically connected to the ultrasonic vibrator 52 constituting the ultrasonic transducer 5, as shown in FIG. 1 . The ultrasonic blade 13 transmits ultrasonic vibrations generated by the ultrasonic transducer 5 from the end of the proximal side Ar2 to the treatment portion 131. The ultrasonic vibrations are longitudinal vibrations that vibrate in a direction along the central axis Ax1. The outer peripheral surface of the ultrasonic blade 13, excluding the treatment portion 131, is covered by an electrically insulating inner tube TI ( FIG. 2 ).

[0031] As shown in FIG. 1 , the ultrasonic transducer 5 includes a TD (transducer) case 51 and an ultrasonic vibrator 52 .

[0032] The TD case 51 supports the ultrasonic transducer 52 and is detachably connected to the fixed handle 6 .

[0033] The ultrasonic vibrator 52 generates ultrasonic vibrations under the control of the control device 3. In this embodiment, the ultrasonic vibrator 52 is configured by a BLT (bolt-tightened Langevin type vibrator).

[0034] [Configuration of the control device] The control device 3 comprehensively controls the operation of the treatment tool 2 via the electric cable C (Fig. 1). Specifically, the control device 3 detects a treatment operation on the switch 8 by an operator such as a surgeon via the electric cable C. When the control device 3 detects the treatment operation, it applies treatment energy to the treatment target grasped between the jaw 11 and the treatment portion 131 via the electric cable C. In other words, the control device 3 treats the treatment target.

[0035] For example, when applying ultrasonic energy to a treatment target, the control device 3 supplies driving power to the ultrasonic vibrator 52 via the electric cable C. This causes the ultrasonic vibrator 52 to generate longitudinal vibrations (ultrasonic vibrations) that vibrate in a direction along the central axis Ax1. The treatment unit 131 also vibrates at a desired amplitude due to the longitudinal vibrations. Then, ultrasonic vibrations are supplied from the treatment unit 131 to the treatment target grasped between the jaw 11 and the treatment unit 131. Ultrasonic energy is applied from the treatment unit 131 to the treatment target.

[0036] Furthermore, for example, when applying high-frequency energy to a treatment target, the control device 3 supplies high-frequency power between the electrode EP provided on the jaw 11 and the ultrasonic blade 13 via an electric cable C or the like. When high-frequency power is supplied between the electrode EP and the ultrasonic blade 13, a high-frequency current is supplied to the treatment target grasped between the jaw 11 and the treatment section 131. In other words, high-frequency energy is applied to the treatment target.

[0037] [Regarding the Jaw Configuration] FIG. 4 is a diagram illustrating the configuration of the jaw 11. Specifically, FIG. 4 is a perspective view of the jaw 11 as viewed from the treatment portion 131 side. For ease of explanation, the electrode EP and the first and second conductive surfaces CS1 and CS2 are marked with dots in FIG. 4 . The jaw 11 is made of a second resin material that is electrically insulating and biocompatible, such as polyether ether ketone (PEEK) or polyphenylsulfone (PPSU). As shown in FIG. 4 , the jaw 11 is a member integrally formed with a jaw body 111, a plurality of first teeth 112, a plurality of second teeth 113, and a pair of bearings 114.

[0038] The jaw body 111 is configured as a long plate body, and is disposed with one plate surface facing the ultrasonic blade 13 .

[0039] As shown in Figure 4, the multiple first tooth portions 112 each protrude from one side of the width direction on the surface of the jaw body 111 facing the treatment portion 131 toward the treatment portion 131, and are arranged side by side along the longitudinal direction of the jaw body 111.

[0040] As shown in Figure 4, the multiple second tooth portions 113 each protrude from the other side of the width direction on the treatment section 131 side surface of the jaw body 111 toward the treatment section 131 side, and are arranged side by side along the longitudinal direction of the jaw body 111.

[0041] Here, as shown in FIGS. 3 and 4 , a recess 115 is provided in a widthwise central portion of the surface of the jaw body 111 facing the treatment section 131, the recess 115 being recessed on a side away from the treatment section 131 and extending along the longitudinal direction of the jaw body 111. Furthermore, claw portions 116 and 117 ( FIGS. 3 and 4 ) protruding toward the widthwise center and extending along the longitudinal direction of the jaw body 111 are provided on sidewall portions on both sides of the widthwise direction of the jaw body 111 that form the recess 115. The abutting member 12 is mechanically fixed to the jaw 11 by being engaged with the claw portions 116 and 117. That is, the abutting member 12 is provided in the widthwise central portion of the jaw 11.

[0042] The pair of bearing portions 114 are respectively provided at the end of the base end side Ar2 of the jaw body 111, and are each composed of a plate body that faces the jaw body 111 in the width direction. The pair of bearing portions 114 have the same configuration. Therefore, the following will describe the configuration of only one bearing portion 114.

[0043] As shown in Fig. 4, the bearing portion 114 is provided with first and second insertion holes 1141, 1142 that penetrate the front and back, respectively. The bearing portion 114 is connected to the outer pipe 10 by inserting the first pin Pi1 into the first insertion hole 1141. In other words, the first insertion hole 1141 corresponds to the insertion hole according to the present invention. The bearing portion 114 is connected to the inner pipe PI by inserting the second pin Pi2 into the second insertion hole 1142.

[0044] [Configuration of the Electrode and First and Second Conductive Surfaces] As shown in Fig. 4, the electrodes EP are provided on the inner surfaces of the first teeth 112 in the width direction (on the side of the second teeth 113), the tip surfaces of the first teeth 112, the inner surfaces of the second teeth 113 in the width direction (on the side of the first teeth 112), and the tip surfaces of the second teeth 113. In addition, a coating material that is non-adhesive to the treatment target is applied to the electrodes EP. The coating material is an extremely thin coating material containing fluorine or silicon, having a thickness of approximately several hundred nanometers to several micrometers.

[0045] As shown in FIG. 4, the first conductive surface CS1 is provided on the inner surface of the first insertion hole 1141.

[0046] As shown in FIG. 4, the second conductive surface CS2 is provided on the inner surface of the bearing portion 114 in the width direction (the other bearing portion 114 side), and electrically connects the electrode EP and the first conductive surface CS1.

[0047] The electrode EP and the first and second conductive surfaces CS1 and CS2 described above are formed by the following three-dimensional plating process. Specifically, a laser is irradiated at a predetermined position on the jaw 11 made of the second resin material. Then, electroless plating is used to form the electrode EP and the first and second conductive surfaces CS1 and CS2 at the laser irradiation position. The thickness of the electrode EP and the first and second conductive surfaces CS1 and CS2 is, for example, approximately several micrometers. Furthermore, a structure produced by such a three-dimensional plating process is called a molded interconnect device (MID), as it is a three-dimensional resin molded product with an electrode circuit formed on its surface. The electrode EP and the first and second conductive surfaces CS1 and CS2 are not limited to those formed by the above-described three-dimensional plating process, and may also be formed by other methods.

[0048] When high-frequency power is supplied to the electrode EP to apply high-frequency energy to the treatment target, the high-frequency power is supplied along the electrical path from the electrical cable C to the outer pipe 10 to the first pin Pi1 to the first conductive surface CS1 to the second conductive surface CS2 to the electrode EP.

[0049] The present embodiment described above provides the following advantages. In the treatment tool 2 according to this embodiment, the jaw 11 is at least partially made of the second resin material. The jaw 11 is provided with the electrode EP described above. Therefore, the rigidity of the jaw 11 can be reduced compared to when the jaw 11 is made of a metal material. That is, even if the contact member 12 wears due to repeated output of ultrasonic vibrations, the distance between the ultrasonic blade 13 and the jaw 11 decreases, and the ultrasonic blade 13 and the jaw 11 come into contact with each other, the impact on the ultrasonic blade 13 can be reduced. Therefore, the treatment tool 2 according to this embodiment can reduce the impact on the lifespan of the ultrasonic blade 13.

[0050] In particular, the electrode EP is formed by a three-dimensional plating process, so that even if the jaw 11 is made of the second resin material, the electrode EP can be easily formed at a specific position on the jaw 11.

[0051] In addition, the electrode EP is provided with a coating material that is non-adhesive to the treatment target, which prevents the treatment target from sticking to the electrode EP and allows the treatment target to be treated well.

[0052] (Other Embodiments) Up to this point, the embodiments for carrying out the present invention have been described, but the present invention should not be limited to only the above-described embodiments. In the above-described embodiments, the outer pipe 10 is used as the electrical path from the electric cable C to the electrode EP, but this is not limiting, and an inner pipe PI may be used instead of the outer pipe 10. In other words, the pipe according to the present invention is not limited to the outer pipe 10, and may also be an inner pipe PI. In the above-described embodiments, the following modified examples 1 and 2 may be used.

[0053] (Modification 1) Fig. 5 is a diagram illustrating Modification 1 of the embodiment. Specifically, Fig. 5 is a diagram showing a metal member 118 provided inside the jaw 11. In the above-described embodiment, as in Modification 1 shown in Fig. 5, a metal member 118 may be provided inside the jaw 11 to ensure the rigidity of the jaw 11.

[0054] As shown in Figure 5, the metal member 118 comprises a metal member main body 1181 that serves as the base for the jaw body 111, the plurality of first tooth portions 112, and the plurality of second tooth portions 113, and a metal member bearing portion 1182 that serves as the base for a pair of bearing portions 114.

[0055] Here, as shown in Figure 5, the metal member bearing portion 1182 is provided with a first insertion hole 1182a corresponding to the first insertion hole 1141 and a second insertion hole 1182b corresponding to the second insertion hole 1142.

[0056] The jaw 11 is then formed by molding (insert molding) or coating the second resin material onto the outer peripheral surface of the metal member 118. An electrode EP is formed on the outer surface of the jaw 11 by the three-dimensional plating process described in the above embodiment. The electrode EP is not limited to one formed by the above-mentioned three-dimensional plating process, and one formed by other methods may also be used.

[0057] The above-described first modification provides the same effects as the above-described embodiment, as well as the following effects: In the treatment tool 2 according to the above-described embodiment, a metal member 118 is provided inside the jaw 11. This ensures the rigidity of the jaw 11, and allows the jaw 11 to have a longer life.

[0058] (Modification 2) Fig. 6 is a diagram illustrating Modification 2 of the embodiment. Specifically, Fig. 6 is a cross-sectional view corresponding to Fig. 3, in which the distal end portion of the treatment tool 2 according to Modification 2 is cut along a plane perpendicular to the central axis Ax1. In the above-described embodiment, ultrasonic energy and high-frequency energy are used as the treatment energy applied by the treatment tool 2 to the treatment target, but this is not limiting, and only high-frequency energy may be used.

[0059] As shown in FIG. 6 , the treatment tool 2 according to the second modification employs a gripping portion 15 instead of the jaw 11 , the abutting member 12 , and the ultrasonic blade 13 .

[0060] The gripping portion 15 is a portion that grips a treatment target and applies high-frequency energy to the treatment target to treat the treatment target. As shown in Figure 6, the gripping portion 15 includes first and second gripping members 16 and 17.

[0061] As shown in FIG. 6 , the first gripping member 16 includes a first jaw 161 , a first electrode 162 , and a contact portion 163 .

[0062] The first jaw 161 is formed in an elongated shape extending along the central axis Ax1. The ends of the base end side Ar2 of the first jaw 161 are connected to the outer pipe 10 and the inner pipe PI by first and second pins Pi1 and Pi2, respectively, as in the above-described embodiment. The first jaw 161 opens and closes relative to the second gripping member 17, as in the jaw 11 described in the above-described embodiment.

[0063] In this first jaw 161, as shown in Figure 6, a cutter groove portion 1611 is provided on the surface facing the second gripping member 17, which is located in the center of the width direction and extends from the base end of the first jaw 161 toward the tip side Ar1 along the central axis Ax1.

[0064] The first jaw 161 described above, like the jaw 11 described in the above embodiment, is made of a resin material that is electrically insulating and biocompatible, such as polyether ether ketone (PEEK) or polyphenylsulfone (PPSU).

[0065] The first electrode 162 is a part to which high-frequency power is supplied from the control device 3 to a second electrode 173 ( FIG. 6 ) constituting the second gripping member 17. This first electrode 162 has a U-shape that surrounds the cutter groove portion 1611 in a planar manner, and is provided on the surface of the first jaw 161 facing the second gripping member 17, with both ends of the U-shape facing the base end side Ar2.

[0066] The first electrode 162 described above is formed by a three-dimensional plating process, similar to the electrode EP described in the above embodiment. Note that the electrode EP is not limited to one formed by the above three-dimensional plating process, and one formed by other methods may also be used.

[0067] In addition, a coating material that is non-adhesive to the treatment target is applied onto the first electrode 162. The coating material is an extremely thin coating material of about several hundred nanometers to several micrometers that contains fluorine or silicon.

[0068] The contact portion 163 has a hemispherical shape and is made of an electrically insulating material, and is provided on the surface of the first electrode 162 facing the second gripping member 17. The contact portion 163 comes into contact with the second electrode 173 when the first gripping member 16 is closed relative to the second gripping member 17. In other words, the contact portion 163 prevents the first and second electrodes 162, 173 from being short-circuited to each other.

[0069] As shown in FIG. 6 , the second gripping member 17 includes a second jaw 171 , a support member 172 , and a second electrode 173 .

[0070] The second jaw 171 is a portion of the outer pipe 10 that extends toward the tip side Ar1, and is formed in an elongated shape that extends along the central axis Ax1.

[0071] As shown in FIG. 6, the second jaw 171 has a recess 1711 on the surface facing the first gripping member 16, the recess 1711 being located in the center in the width direction and extending along the central axis Ax1.

[0072] The support member 172 is an elongated flat plate extending along the central axis Ax1, and has an outer shape that is substantially the same as the inner shape of the recess 1711. The support member 172 is fitted into the recess 1711. The support member 172 is made of an electrically insulating material with low thermal conductivity, such as PEEK. The support member 172 is disposed between the second electrode 173 and the second jaw 171. That is, the provision of the support member 172 electrically insulates the second jaw 171 from the second electrode 173.

[0073] 6, a cutter groove 1721 extending from the base end toward the tip end Ar1 along the central axis Ax1 is provided in the widthwise central portion of the surface of this support member 172 facing the first gripping member 16. This cutter groove 1721 faces the cutter groove 1611 when the first gripping member 16 is closed relative to the second gripping member 17.

[0074] The second electrode 173 is a portion to which high-frequency power is supplied from the control device 3 to the first electrode 162. The second electrode 173 is made of a conductive material such as copper, and is a flat plate having a U-shape that planarly surrounds the cutter groove portion 1721. The second electrode 173 is fixed to the surface of the support member 172 on the side of the first gripping member 16, with both ends of the U-shape facing the base end side Ar2.

[0075] In addition, a coating material that is non-adhesive to the treatment target is applied to the second electrode 173. The coating material is an extremely thin coating material of about several hundred nanometers to several micrometers that contains fluorine or silicon.

[0076] 6, the gripping portion 15 is provided with a cutter CT that is located in the cutter grooves 1611, 1721 and moves back and forth along the central axis Ax1 in response to the operation of an operating lever (not shown) by the surgeon. That is, the target area gripped between the first and second gripping members 16, 17 is incised by the advancement and retreat of the cutter CT.

[0077] REFERENCE SIGNS LIST 1 treatment system 2 treatment tool 3 control device 4 handpiece 5 ultrasonic transducer 6 fixed handle 7 operating handle 8 switch 9 rotation knob 10 outer pipe 11 jaw 12 abutment member 13 ultrasonic blade 15 gripping portion 16 first gripping member 17 second gripping member 51 TD case 52 ultrasonic vibrator 111 jaw body 112 first teeth portion 113 second teeth portion 114 bearing portion 115 recessed portion 116, 117 claw portion 118 metal member 131 treatment portion 161 first jaw 162 first electrode 163 abutment portion 171 second jaw 172 support member 173 second electrode 1141 first insertion hole 1142 second insertion hole 1181 Metal member body 1182 Metal member bearing portion 1182a First insertion hole 1182b Second insertion hole 1611 Cutter groove portion 1711 Recessed portion 1721 Cutter groove portion Ar1 Tip side Ar2 Base side Ax1 Central axis C Electric cable CS1 First conductive surface CS2 Second conductive surface CT Cutter EP Electrode Pi1 First pin Pi2 Second pin PI Inner pipe

Claims

1. An ultrasonic treatment device comprising: an ultrasonic blade that supplies ultrasonic vibrations and high-frequency current to biological tissue, a jaw that opens and closes relative to the ultrasonic blade; and a contact member that is provided on the jaw and made of a first resin material that contacts the ultrasonic blade when the jaw is closed relative to the ultrasonic blade, wherein at least a portion of the jaw is made of a second resin material and has an electrode that supplies the high-frequency current to at least a portion of the contact surface that contacts the biological tissue.

2. An ultrasonic treatment device as described in claim 1, wherein the abutment member is provided in the central portion of the jaw in the width direction, and the electrodes are provided on at least a portion of the contact surface located on both sides of the abutment member in the width direction.

3. The ultrasonic treatment device according to claim 1, wherein the second resin material is polyether ether ketone or polyphenylsulfone.

4. The ultrasonic treatment device according to claim 1, wherein the electrodes are formed by a three-dimensional plating process.

5. An ultrasonic treatment device as described in claim 1, further comprising: a cylindrical pin; and a pipe to which the pin is attached and which rotatably supports the jaw by means of the pin; and the electrode is electrically connected to the pipe via the pin.

6. An ultrasonic treatment instrument as described in claim 5, wherein the jaw is provided with an insertion hole through which the pin is inserted, and the inner surface of the insertion hole is provided with a first conductive surface that electrically connects the pin and the electrode.

7. An ultrasonic treatment instrument according to claim 6, wherein the jaw is provided with a second conductive surface that electrically connects the first conductive surface and the electrode.

8. An ultrasonic treatment device according to claim 1, wherein the electrodes are provided with a coating material that is non-adhesive to the biological tissue.

9. An ultrasonic treatment device according to claim 1, wherein a metal member is provided inside the jaw to ensure the rigidity of the jaw.

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