WO2019123607A1

WO2019123607A1 - Energy treatment tool and method for manufacturing energy treatment tool

Info

Publication number: WO2019123607A1
Application number: PCT/JP2017/045937
Authority: WO
Inventors: 庸高銅
Original assignee: オリンパス株式会社
Priority date: 2017-12-21
Filing date: 2017-12-21
Publication date: 2019-06-27

Abstract

This energy treatment tool is provided with: a base material that is formed from metal and that is provided with a treatment surface for treating a to-be-treated object thereon; a coating layer that is disposed on the surface of the base material and that has thermal insulation properties and electrical insulation properties; and an organic layer that is disposed between the surface of the base material and the coating layer, that includes a coupling agent, and that adheres the coating layer to the surface of the base material by the coupling agent bonding to the surface of the base material and to the coating layer.

Description

Energy treatment tool and method of manufacturing energy treatment tool

The present invention relates to an energy treatment tool that treats a treatment target using treatment energy, and a method of manufacturing the energy treatment tool.

US2016 / 0144204A1 discloses an energy treatment tool for treating a treatment target such as a living tissue using ultrasonic vibration. This energy treatment tool includes a vibration transmission member (ultrasound probe) to which ultrasonic vibration generated by the ultrasonic transducer is transmitted. The vibration transfer member forms a treatment surface of the end effector. The treatment of the treatment target is performed by applying the ultrasonic vibration transmitted to the vibration transmission member to the treatment target from the treatment surface.

In the energy treatment device of US2016 / 0144204A1, a coating layer is formed on the back surface of the end effector by a coating having heat insulation and electrical insulation. By providing the coating layer, heat invasion to the unintended biological tissue from the back surface is suppressed. In an energy treatment device provided with a coating layer, the adhesion strength of the coating layer to the end effector may affect the treatment performance and durability of the energy treatment device.

The present invention has been made in view of the above problems, and an object of the present invention is an energy treatment tool in which the adhesion strength to the end effector of the heat insulating coating having the heat insulating property and the electric insulating property is secured, An object of the present invention is to provide a method of manufacturing an energy treatment tool.

In order to achieve the above object, an energy treatment tool according to an aspect of the present invention is formed of metal and provided on a surface of a base material provided with a treatment surface for treating an object to be treated; A coating layer having an electrical insulating property, and provided between the surface of the base material and the coating layer, and containing a coupling agent, the coupling agent comprising each of the surface of the base material and the coating layer And bonding the coating layer to the surface of the matrix by bonding to the organic layer.

In a method of manufacturing an energy treatment device according to an aspect of the present invention, a base material provided with a treatment surface for treating a treatment target is formed of metal, and a coupling structure of a coupling agent is bonded to the surface of the base material Forming an organic layer on the surface of the matrix and bonding a coating agent to the surface of the organic layer, thereby forming a coating layer having thermal insulation and electrical insulation on the surface of the matrix And forming the adhesion strength between the coating layer and the surface of the base material by raising the temperature of the base material.

FIG. 1A is a view schematically showing an energy treatment tool according to a first embodiment. FIG. 1B is a schematic view of the first grip piece according to the first embodiment as viewed from the treatment surface side. FIG. 2 is a view schematically showing the end effector according to the first embodiment in a cross section intersecting a longitudinal axis. FIG. 3 is a view schematically showing how an organic layer is formed on the treatment surface according to the first embodiment. FIG. 4 is a view schematically showing a state in which the organic layer and the coating layer are formed on the treatment surface according to the first embodiment. FIG. 5 is a view showing a sticking state of the coating layer before the oscillation of the ultrasonic vibration in an example of the evaluation of the adhesion strength of the coating layer according to the comparative example of the first embodiment. FIG. 6 is a view showing a sticking state of the coating layer when ultrasonic vibration is oscillated for 30 minutes in one example of evaluation of the adhesion strength of the coating layer according to the comparative example of the first embodiment. FIG. 7 is a view showing a sticking state of the coating layer before the oscillation of the ultrasonic vibration in an example of the evaluation of the adhesion strength of the coating layer according to the first embodiment. FIG. 8 is a view showing a sticking state of the coating layer when ultrasonic vibration is oscillated for 120 minutes in an example of evaluation of adhesion strength of the coating layer according to the first embodiment. FIG. 9 is a view schematically showing an end effector according to a second embodiment in a cross section intersecting a longitudinal axis.

First Embodiment
A first embodiment of the present invention will be described with reference to FIGS. 1A-5.

FIG. 1A is a view showing a treatment tool 1 which is an energy treatment tool of the present embodiment. As shown in FIG. 1A, the treatment instrument 1 includes a housing 4 and a cylindrical shaft 5 connected to the housing 4. The housing 4 can be held. One end of a cable 7 is connected to the housing 4. The other end of the cable 7 is detachably connected to the power supply 3.

The shaft 5 defines a longitudinal axis L. Here, the direction along the longitudinal axis L is taken as the longitudinal direction. One side in the longitudinal direction is the tip side (arrow L1 side in FIG. 1A), and the side opposite to the tip side is the proximal side (arrow L2 side in FIG. 1A). The shaft 5 is extended from the proximal end side to the distal end side along the longitudinal axis L and is connected to the distal end side of the housing 4.

An end effector 6 is provided at the tip of the shaft 5. The end effector 6 includes a first gripping piece 13 and a second gripping piece 14. Between the first grip piece 13 and the second grip piece 14 can be opened and closed. In the present embodiment, the first gripping piece 13 is supported by the shaft 5, and the second gripping piece 14 is rotatably attached to the shaft 5 with respect to the first gripping piece 13.

The first grip piece 13 is provided with a treatment surface (facing surface) 17 that faces the second grip piece 14 and applies treatment energy to the treatment target. The second gripping piece 14 is provided with a treatment surface (facing surface) 18 that faces the treatment surface 17 of the first gripping piece 13 and applies treatment energy to the treatment target.

The open / close direction of the end effector 6 intersects (is perpendicular or substantially perpendicular) to the longitudinal axis L. Of the opening and closing directions of the end effector 6, the side in which the second gripping piece 14 opens with respect to the first gripping piece 13 is the opening direction (arrow Y1) of the second gripping piece 14, and the second gripping piece 14 is The side closed with respect to the first gripping piece 13 is taken as the closing direction (arrow Y2) of the second gripping piece 14.

As shown in FIG. 1B, a direction intersecting (perpendicularly or substantially perpendicular) to the longitudinal axis L and intersecting (perpendicular or nearly perpendicular) to the opening / closing direction of the end effector 6 is The width direction (arrows B1 and B2).

The first grip piece 13 includes a bending portion 25. The bending portion 25 is provided at the tip of the first grip piece 13 and is curved to one side in the width direction of the end effector 6 with respect to the longitudinal axis L.

As shown in FIG. 1A, the housing 4 includes a housing body 10 and a grip (fixed handle) 11. The housing body 10 extends along the longitudinal axis L. The grip 11 is extended from the housing body 10 in a direction away from the longitudinal axis L. The shaft 5 is connected to the housing body 10 from the tip side.

A movable handle 12 is rotatably attached to the housing body 10. The movable handle 12 is located on the side where the grip 11 is located with respect to the longitudinal axis L, and is located on the distal side with respect to the grip 11 in the present embodiment. When the movable handle 12 rotates with respect to the housing body 10, the movable handle 12 opens or closes with respect to the grip 11. When the movable handle 12 opens or closes with respect to the grip 11, an operation for opening or closing the end effector 6 as described above is input at the movable handle 12. That is, the movable handle 12 is an open / close operation input unit.

The movable handle 12 and the second grip piece 14 are connected via the movable member 16. The movable member 16 is extended along the longitudinal axis L inside the shaft 5. By opening or closing the movable handle 12 with respect to the grip 11, the movable member 16 moves along the longitudinal axis L with respect to the shaft 5 and the housing 4, and the second grip piece 14 rotates with respect to the shaft 5 Do. Thereby, the

holding pieces

13 and 14 are opened or closed. When the treatment target is disposed between the

holding pieces

13 and 14, the treatment target is held between the

holding pieces

13 and 14 by closing between the

holding pieces

13 and 14.

In one embodiment, the movable handle 12 is proximal to the grip 11. In another embodiment, the movable handle 12 is located on the opposite side of the longitudinal axis L to the side where the grip 11 is located, and intersects the longitudinal axis L in the opening operation and the closing operation. Vertically or nearly vertically).

The power supply device 3 includes a high frequency power supply and an ultrasonic power supply. The high frequency power supply includes a waveform generator, a conversion circuit, a transformer, and the like, and converts power from a battery power supply or an outlet power supply to high frequency power. Further, as described later, each of the first grip piece 13 and the second grip piece 14 is at least partially formed of a conductive material. The high frequency power source is electrically connected to the conductive material of each of the first gripping piece 13 and the second gripping piece 14 through an electrical path provided through the inside of the cable 7, the inside of the housing 4 and the inside of the shaft 5. Connected to The high frequency power supply outputs the converted high frequency power through the aforementioned electric path, and supplies the first holding piece 13 and the second holding piece 14 with high frequency power as electric energy.

The ultrasonic power source includes a waveform generator, a conversion circuit, a transformer, and the like, and converts power from a battery power source or an outlet power source to AC power. Further, inside the housing main body 10, an ultrasonic transducer 9 and a vibration transmitting member (ultrasonic probe) 8 connected to the ultrasonic transducer 9 from the tip side are provided. The ultrasound power source is electrically connected to the ultrasound transducer 9 via an electrical path provided through the interior of the cable 7 and the interior of the housing 4. The supply of electric energy (AC power) from the ultrasonic power supply generates ultrasonic vibration in the ultrasonic transducer 9. The ultrasonic vibration generated by the ultrasonic transducer 9 is transmitted to the vibration transmitting member 8.

The vibration transmitting member 8 is extended from the inside of the housing body 10 to the tip side, passes through the inside of the shaft 5, and protrudes from the tip of the shaft 5 to the tip side. And the 1st holding piece 13 is formed of the protrusion part from the shaft 5 of the vibration transmission member 8 to the front end side. The ultrasonic vibration generated by the ultrasonic transducer 9 is transmitted to the tip of the vibration transmitting member 8 forming the first gripping piece 13. Thereby, ultrasonic vibration is transmitted to the 1st holding piece 13 as treatment energy. The vibration transfer member 8 is preferably made of a material having conductivity and high vibration transferability. In the present embodiment, the vibration transfer member 8 is formed of a titanium alloy which is compatible with living tissue. The vibration transfer member 8 may be formed of a metal material other than a titanium alloy such as duralmin or stainless steel.

The shape and material including the length and the diameter are appropriately set so that the vibration transfer member 8 vibrates at the resonance frequency of the ultrasonic transducer 9 and the frequency at the output of the ultrasonic power source. The total length of the vibrator including the ultrasonic transducer 9 and the vibration transmitting member 8 is preferably, for example, a length that is an integral multiple of a half wavelength of the ultrasonic vibration to be transmitted. The half wavelength of the ultrasonic vibration is determined by the resonance frequency of the vibrator including the ultrasonic transducer 9 and the vibration transmitting member 8. In one embodiment, the vibrator including the ultrasonic transducer 9 and the vibration transfer member 8 vibrates at any resonance frequency of, for example, 46 kHz to 48 kHz, and vibrates at any resonance frequency of 46.5 kHz to 47.5 kHz. It is preferable to do.

As shown in FIG. 1B, in the state where ultrasonic vibration is transmitted to the first gripping piece 13 formed by the vibration transmitting member 8, the tip end of the first gripping piece 13 becomes an antinode A1 of vibration. Further, inside the distal end portion of the shaft 5, the vibration transfer member 8 is supported by the shaft 5 at the position of the node of vibration.

The housing main body 10 is provided with an operation button 15. The operation button 15 is an energy operation input unit. In the state where the treatment object is held between the holding

pieces

13 and 14, by inputting an operation with the operation button 15, for example, electric energy is supplied to the treatment tool 1 from each of the high frequency power supply and the ultrasonic power supply. . Then, high frequency current and ultrasonic vibration are applied as treatment energy to the grasped treatment target. In one embodiment, a foot switch electrically connected to the power supply device 3 is provided separately from the treatment tool 1 instead of or in addition to the operation button 15.

In one embodiment, the housing body 10 is provided with a plurality of operation buttons 15. In the state where the treatment target is held, by inputting an operation with one of the plurality of operation buttons 15, for example, only a high frequency current is given to the treatment target as treatment energy. In addition, in the state where the treatment object is held, by inputting an operation with another one of the plurality of operation buttons 15, for example, high frequency current and ultrasonic vibration can be used as treatment energy in the treatment object Granted.

In another embodiment, an operating member such as a rotation knob is attached to the housing body 10. In this case, by rotating the operating member relative to the housing 4 about the longitudinal axis L, the shaft 5 and the end effector 6 together with the operating member rotate about the longitudinal axis L relative to the housing 4 .

FIG. 2 is a view showing the end effector 6 in a cross section (vertical or substantially vertical) intersecting the longitudinal axis L. As shown in FIG. The first grip piece 13 has conductivity. The first grip piece 13 is formed of, for example, metal. In the present embodiment, the first gripping piece 13 is formed by a projecting portion of the vibration transmitting member 8 from the shaft 5 to the tip side, and is formed of a titanium alloy. The first gripping piece 13 includes a treatment surface 17, a back surface 19 facing the treatment surface 17, and a pair of side surfaces 20 facing outward in the width direction of the end effector 6.

In the present embodiment, the vibration transfer member 8 is a base material having conductivity and forming the treatment surface 17. Further, in the present embodiment, the first grip piece 13 is formed of a base material.

The vibration transfer member 8 is connected to one end of an electrical path formed of an electrical wiring or the like inside the housing main body 10. This electrical path extends through the interior of the housing 4 and the interior of the cable 7, and the other end is connected to the high frequency power supply of the power supply 3. The vibration transfer member 8 and the high frequency power source are electrically connected via this electrical path. Thereby, high frequency power can be supplied from the high frequency power source to the first gripping piece 13. The first grip piece 13 functions as a first electrode by being supplied with high frequency power.

The second gripping piece (gripping member) 14 comprises a support (jaw) 21. The support 21 is rotatably connected to the shaft 5. The support 21 has conductivity. The support (conductive member) 21 is made of, for example, metal or the like. The support 21 forms part of the treatment surface 18.

The support 21 is connected to one end of an electrical path formed of an electrical wiring or the like. This electrical path extends through the interior of the shaft 5, the interior of the housing 4 and the interior of the cable 7, and the other end is connected to the high frequency power supply of the power supply 3. The support 21 and the high frequency power source are electrically connected via this electrical path. Thereby, high frequency power can be supplied from the high frequency power source to the support 21. The support 21 functions as a second electrode different from the first electrode by being supplied with high frequency power.

The second grip piece 14 includes a short circuit preventing member (pad member) 23. The short circuit preventing member 23 is attached to the support 21 from the side of the gripping piece 13. The short circuit preventing member 23 is disposed at the central portion of the gripping piece 14 in the width direction, and forms a central portion of the treatment surface 18. The short circuit prevention member 23 has electrical insulation. The short circuit prevention member 23 is formed of, for example, a resin material.

In a state where the gap between the

gripping pieces

13 and 14 is closed, the short circuit preventing member 23 of the gripping piece 14 abuts on the treatment surface 17 of the gripping piece 13. In this state, a gap is formed between the support 21 and the treatment surface 17 of the gripping piece 13, and the treatment surface 17 of the gripping piece 13 does not contact the support 21. Therefore, in a state where the support 21 and the grip piece 13 function as electrodes, a short circuit in an electric circuit in which high frequency power is output from the power supply device 3 to the support 21 and the grip piece 13 is effectively prevented.

As shown in FIG. 2, an organic layer 41 and a coating layer 51 are formed on the surface of the first grip piece 13. The coating layer 51 is exposed to the outside on the surface of the first grip piece 13. The first gripping piece 13 is covered by the coating layer 51 in a region (first region) where the coating layer 51 is provided. The first grip piece 13 is exposed to the outside in a region (second region) in which the coating layer 51 is not provided.

The organic layer 41 is provided between the coating layer 51 and the surface of the first gripping piece 13. The organic layer 41 is a monomolecular film formed on the surface of the first gripping piece 13 by a surface modifier. The organic layer 41 adheres the first gripping piece 13 to the coating layer 51 by bonding with the surface of the first gripping piece 13 and each of the coating layer 51.

The coating layer 51 has electrical insulation and thermal insulation. The coating agent forming the coating layer 51 is formed of an organic material such as a resin material. In the present embodiment, the coating layer 51 is formed of PEEK (polyether ether ketone) resin which is highly biocompatible. The coating layer 51 is preferably formed of a material containing PEEK resin. The coating layer 51 does not have to be formed of only PEEK resin, and is preferably formed of a composite material containing PEEK resin.

The organic layer 41 and the coating layer 51 are formed on the surface of the first grip piece 13 in a region including the back surface 19 around an axis (peripheral surface) around the longitudinal axis L. The organic layer 41 and the coating layer 51 pass through the back surface 19 from a part of the side surface 20 on one side about the axis (outer peripheral surface) centered on the longitudinal axis L in the outer peripheral surface of the first grip piece 13 It is provided continuously over the range to a part of the side of the other side.

In the present embodiment, the organic layer 41 and the coating layer 51 are provided over the entire first gripping piece 13 in the longitudinal direction. Therefore, the organic layer 41 and the coating layer 51 are formed in the first gripping piece 13 in a range including the bending portion 25 and the position of the antinode A1 of the vibration when the ultrasonic vibration is transmitted.

The organic layer 41 and the coating layer 51 will be described using FIGS. 3 to 4. As shown in FIG. 3, the surface of the first grip piece 13 is covered with hydroxyl group (hydroxyl group) OH by the metal group M reacting with oxygen and moisture in the air. In the present embodiment, the metal group M is titanium.

The organic layer 41 is formed of a material containing a titanate coupling agent. The titanate coupling agent of the present embodiment comprises a titanium atom Ti, one or more hydrolyzable groups OR, and an organic functional group Y. The titanium atom Ti and the three hydrolyzable groups OR form a coupling structure of a titanate coupling agent.

Each of the hydrolysable groups OR is chemically bonded to the titanium atom Ti. The hydrolyzable group OR is a reactive group which is chemically bonded to the inorganic material by hydrolysis or the like, and is, for example, an alkoxy group such as a methoxy group or an ethoxy group. The organic functional group Y is chemically bonded to the titanium atom Ti. The organic functional group Y is a functional group to be bonded to an organic material, and is, for example, a vinyl group, an epoxy group, an amino group, a methacryl group, a mercapto group or the like. In one embodiment, for example, an amino group (amine-based reactive group) is used as the organic functional group Y. In this case, OC2H4NHC2H4NH2 is used as the organic functional group Y, for example.

As shown in FIG. 4, on the surface of the first grip piece 13, the coupling structure of the titanate coupling agent and the surface of the first grip piece 13 are coupled. Then, the coupling structure of the titanate coupling agent and the surface of the first grip piece 13 are combined to form the organic layer 41 on the surface of the first grip piece 13.

Here, the bond between the coupling structure of the titanate coupling agent and the surface of the first gripping piece 13 is the hydrolyzable group OR of the titanate coupling agent and the hydroxyl group OH of the surface of the first gripping piece 13 Chemical bonds (hydrolysis), bonds by chemisorption, bonds by intermolecular force, bonds by other interactions, and the like. Further, in the organic layer 41, the hydrolyzable group OR of the coupling structure is chemically bonded to the hydrolyzable group OR of another coupling structure by hydrolysis.

At this time, a modified surface 42 is formed on the surface of the first grip piece 13 by the organic functional group Y of the titanate coupling agent. In the present embodiment, the modified surface 42 is formed of an organic functional group Y such as an amino group.

On the surface of the first gripping piece 13, the coating layer 51 formed of an organic material and an organic functional group Y (for example, an amino group) forming the modified surface 42 of the organic layer 41 are bonded. The coating layer 51 formed of an organic material and the organic layer 41 are bonded to each other, whereby the coating layer 51 is formed on the surface of the first grip piece 13 via the organic layer 41.

Here, the bonding between the coating layer 51 and the modified surface 42 of the organic layer 41 includes bonding by chemisorption, bonding by intermolecular force, bonding by other interaction, and the like.

Next, a process of forming the organic layer 41 and the coating layer 51 on the surface of the first grip piece 13 including the back surface 19 when manufacturing the treatment tool 1 will be described. When forming the organic layer 41 and the coating layer 51 on the back surface 19, the worker first makes the surface roughness by sand blast in the area on the surface of the first gripping piece 13 where the coating layer 51 is to be formed. Surface treatment (blasting treatment) to increase the In the area where the blast processing is performed on the surface of the first gripping piece 13, the oxide film is removed, and the surface is formed in a concavo-convex shape.

Next, the worker applies a titanate coupling agent to the area on the surface of the first grip piece 13 where the coating layer 51 is to be formed (see FIG. 3). As a result, as described above, the titanate coupling agent is bonded to the surface of the first grip piece 13 to form the organic layer 41. Then, the modified surface 42 is formed on the surface of the first grip piece 13 by the organic layer 41.

Next, the operator applies a liquid coating agent that forms the coating layer 51 on the modified surface 42 formed on the surface of the first grip piece 13. Thereby, as described above, the coupling structure of the silane coupling agent is bonded to the modified surface 42 of the organic layer 41 to form the coating layer 51 (see FIG. 4).

As described above, the organic layer 41 and the coating layer 51 include a part of the side surface 20 and the back surface 19 on the outer peripheral surface of the first gripping piece 13 centered on the extension axis of the first gripping piece 13 It is formed in the area (see FIG. 2). In the step of forming the organic layer 41 and the coating layer 51, for example, by applying mask processing to portions other than the portions where the organic layer 41 and the coating layer 51 are desired to be formed, the organic layer is formed on the desired area 41 and the coating layer 51 are formed.

Next, the operation and effects of the treatment tool 1 of the present embodiment will be described. When performing treatment using the treatment tool 1, first, the end effector 6 is inserted into a body cavity such as the abdominal cavity. Then, a treatment target such as a blood vessel is disposed between the pair of grasping

pieces

13 and 14, and the end effector 6 is closed. Thereby, the treatment target is gripped between the

gripping pieces

13 and 14. In the state where the treatment object is gripped between the

gripping pieces

13 and 14, an operation input for supplying electric energy from the power supply device 3 to the treatment tool 1 is performed, whereby the high frequency current and the ultrasonic vibration are generated as described above. At least one of them is given as treatment energy to the grasped treatment object.

Further, in the present embodiment, the first grip piece 13 and the vibration transfer member 8 are formed of a titanium alloy having good vibration transferability. For this reason, the vibration generated by the ultrasonic transducer is effectively transmitted to the treatment surface 17 via the vibration transfer member 8 and the first grip piece 13.

Further, in the present embodiment, the coating layer 51 is provided in a region including the back surface 19 in the first grip piece 13. As described above, the coating layer 51 has thermal insulation and electrical insulation. For this reason, by providing the coating layer 51, the heat invasion from the part in which the coating layer 51 was provided in the surface of the 1st holding piece 13 is suppressed. This prevents the heat generated due to the treatment from affecting unintended body tissue.

Further, in the present embodiment, an organic layer 41 is provided between the coating layer 51 and the surface of the first grip piece 13. The organic layer 41 bonds the coating layer 51 to the surface of the first gripping piece 13 by bonding to each of the coating layer 51 and the surface of the first gripping piece 13.

Further, in the present embodiment, in the step of applying the titanate coupling agent to the surface of the first grip piece 13, the surface of the first grip piece 13 is the modified surface of the organic layer 41 with the organic functional group Y. 42 are formed. In general, organic materials such as PEEK resin are known to have better bonding to organic materials than to titanium. Therefore, a coating agent formed of an organic material such as PEEK resin is directly bonded to the surface of the first gripping piece 13 by forming the modified surface 42 with the organic layer 41 on the surface of the first gripping piece 13 The adhesion structure of the coating layer 51 to the surface of the first grip piece 13 is improved, and the adhesion strength (adhesive strength) of the coating layer 51 to the surface of the first grip piece 13 is improved. As the adhesion strength of the coating layer 51 to the surface of the first grip piece 13 is improved, the coating layer 51 is less likely to be peeled off, and the deterioration rate of the coating layer 51 due to friction and heat during treatment is reduced.

Further, the adhesion strength of the coating layer 51 to the surface of the first grip piece 13 is improved, whereby the water tightness between the coating layer 51 and the surface of the first grip piece 13 is improved. By improving the water tightness between the coating layer 51 and the surface of the first gripping piece 13, the interface between the coating layer 51 and the organic layer 41, and the organic layer 41 and the first gripping piece 13. The penetration of liquid from the interface with the surface is prevented. Thereby, peeling from the surface of the 1st holding piece 13 of the coating layer 51 is prevented, and the durability of the treatment tool 1 improves.

Moreover, in the present embodiment, an amino group is used as the organic functional group Y possessed by the titanate coupling agent. Therefore, the durability of the coating layer 51 is improved as compared with the case where another functional group is used as the organic functional group Y.

Further, in the present embodiment, the organic layer 41 is formed of a titanate coupling agent. Further, in the present embodiment, the first grip piece 13 is formed of a titanium alloy. Here, it is known that the titanate coupling agent has better bonding to titanium than a coating agent formed of an organic material such as PEEK resin. Therefore, by providing the organic layer 41 between the coating layer 51 and the surface of the first gripping piece 13, a coating agent formed of an organic material such as PEEK resin is directly applied to the surface of the first gripping piece 13. The adhesion strength of the coating layer 51 formed of an organic material such as PEEK resin to the surface of the first grip piece 13 is improved as compared with the case of bonding.

Also, in general, in the curved portion 25, the adhesion strength of the coating layer 51 to the surface of the grip piece 13 is likely to decrease due to the transmission of ultrasonic vibration or the like. In the present embodiment, the organic layer 41 is provided in a region including the curved portion 25 of the first grip piece 13. For this reason, the water resistance and durability of the treatment instrument 1 can be effectively improved by providing the organic layer 41 for improving the adhesion strength of the coating layer 51 in the region where the adhesion strength tends to decrease. .

Also, in general, at an antinode position of vibration in a state where ultrasonic vibration of a predetermined resonance frequency is transmitted to the first grip piece 13, displacement of the coating layer 51 with respect to the surface of the grip piece 13 due to ultrasonic vibration. Adhesion strength is likely to decrease. In the present embodiment, the organic layer 41 is provided on the surface of the gripping piece 13 in a region including the antinode position A1 of the vibration. For this reason, by providing the organic layer 41 for improving the adhesion strength of the coating layer 51 in the region where the adhesion strength is likely to be reduced, the vibration followability to the first grip piece 13 of the coating layer 51 is improved. The water resistance and durability of the treatment instrument 1 can be effectively improved.

The organic layer 41 and the coating layer 51 are in close contact with the surface of the first gripping piece 13 in a state along the uneven shape formed on the surface of the first gripping piece 13 by blast processing. Therefore, an anchor effect acts between the surface of the first grip piece 13 and the organic layer 41 and the coating layer 51. Due to this anchor effect, the adhesion strength of the organic layer 41 and the coating layer 51 to the surface of the first gripping piece 13 is increased.

Further, according to the configuration of the present embodiment, the adhesion structure between the coating layer 51 and the surface of the first gripping piece 13 is improved, whereby the adhesion strength of the coating layer 51 to the surface of the first gripping piece 13 is improved. Thus, the water tightness between the coating layer 51 and the surface of the first gripping piece 13 is improved. By improving the water tightness between the coating layer 51 and the surface of the first gripping piece 13, the first gripping piece 13 formed of a titanium alloy or the like is subjected to a heat treatment such as a subzero treatment or the like. It becomes easy to carry out the release process of the residual stress.

Here, an example of a method of performing subzero processing on the treatment tool 1 of the present embodiment will be described. In an example of the subzero treatment, first, the first gripping piece 13 is cooled using dry ice, carbon dioxide gas, liquid nitrogen or the like until the temperature of the first gripping piece 13 becomes 0 ° C. or less (eg, −80 ° C.) Do. Next, the temperature of the first gripping piece 13 is rapidly raised by putting the cooled first gripping piece 13 into water such as hot water. At this time, the temperature of the first gripping piece 13 is raised, for example, from 0 ° C. or less to 0 ° C. or more, and the first gripping piece 13 is continued until the temperature increase of the first gripping piece 13 reaches 100 ° C. or more. Soar the temperature of By this processing, a temperature impact to the side where the temperature rises in the first gripping piece 13 is generated, and the residual stress of the titanium alloy forming the first gripping piece 13 is released. Adhesion strength between the surface of the first gripping piece 13 subjected to the blasting process and the organic layer 41 and the coating layer 51 by releasing the residual stress of the titanium alloy forming the first gripping piece 13 Will be further improved. And the desired adhesion strength can be obtained by performing the process including the cooling process and the temperature rising process of the first holding piece 13 one or more times.

As described above, in the present embodiment, by adhering the coating layer 51 to the surface of the first gripping piece 13 via the organic layer 41, the space between the coating layer 51 and the surface of the first gripping piece 13 is obtained. Water tightness is improved. By improving the water tightness between the coating layer 51 and the surface of the first gripping piece 13, even when the first gripping piece 13 is introduced into a liquid such as water, the coating layer 51 and the first gripping The entry of liquid to the surface of the piece 13 is suppressed. This makes it possible to perform the above-mentioned subzero processing on the first gripping piece 13 on which the coating layer 51 is provided. As a result, the adhesion strength between the surface of the first grip piece 13 and the coating layer 51 is further improved.

In addition, an example of a method of evaluating the adhesion strength of the coating layer 51 to the surface of the first grip piece 13 will be described. In the evaluation of the adhesion strength of the coating layer 51 to the first gripping piece 13, the first gripping piece 13 on which the organic layer 41 and the coating layer 51 are formed as in the present embodiment, and the organic layer 41 as a comparative example. The evaluation was performed on the first gripping piece 13 in which the coating layer 51 was directly applied to the surface without being provided. In the evaluation of adhesion strength, first, the first gripping piece 13 on which the coating layer 51 was formed was inserted into water. Next, in a state where the first grip piece 13 is located in water, an operation input for transmitting ultrasonic vibration to the first grip piece 13 is performed by an operation input, and the treatment tool 1 is oscillated. At this time, ultrasonic vibration of a predetermined resonance frequency and a predetermined vibration velocity was transmitted to the first grip piece 13. The vibration velocity is calculated by the formula 2 × π × resonance frequency × amplitude (half amplitude). The predetermined resonance frequency is 20 to 100 kHz. The predetermined vibration velocity is 3 m / s to 15 m / s. Preferably, the resonant frequency is 47 kHz and the amplitude (half amplitude) is 80 μm. At this time, the vibration velocity is 11.8 m / s.

Next, the occurrence of blisters (air vesicles) in the portion where the coating layer 51 was provided was observed over time. In the blister, the liquid that has entered between the coating layer 51 and the surface of the gripping piece 13 volatilizes or evaporates, and the coating layer 51 swells with respect to the surface of the gripping piece 13, whereby the surfaces of the coating layer 51 and the gripping piece 13 And an air layer formed between them. The occurrence of blisters between the coating layer 51 and the surface of the gripping piece 13 may reduce the adhesion strength of the coating layer 51 and affect the treatment performance using the treatment tool 1. For this reason, the water resistance and durability of the treatment tool 1 can be evaluated by observing the blister.

For example, in the case where the coating layer 51 is directly applied to the surface of the first gripping piece 13, that is, the coating layer 51 is formed on the surface of the first gripping piece 13 without the organic layer 41 of this embodiment. In the example, from the state of FIG. 5 before oscillation, the state of FIG. 6 is obtained by oscillating the treatment tool 1 in water for 30 minutes. As shown in FIG. 6, in the configuration of the comparative example, blisters 60 were observed after the treatment instrument 1 oscillated in water for 30 minutes.

On the other hand, for example, when the coating layer 51 is adhered to the surface of the first grip piece 13 through the organic layer 41 of the present embodiment and the above-mentioned subzero treatment is performed, underwater from the state of FIG. By performing the oscillation of the treatment tool 1 for 120 minutes, the state of FIG. 8 is obtained. As shown in FIG. 8, in the configuration of the present embodiment, no blister was observed even after oscillating the treatment tool 1 in water for 120 minutes. Thereby, according to the composition of this embodiment, it was checked that the water resistance and endurance of treatment implement 1 improve.

Second Embodiment
A second embodiment of the present invention will be described with reference to FIG. The second embodiment is a modification of the configuration of the first embodiment as follows. The same parts as those of the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

As shown in FIG. 9, also in the present embodiment, the coating layer 51 is one of the side surfaces 20 on one side about the axis (peripheral surface) centered on the longitudinal axis L on the surface of the first gripping piece 13. It is provided continuously from the part through the back surface 19 to a part of the other side surface.

The organic layer 41 may not be provided over the entire region where the coating layer 51 is formed around the axis (peripheral surface) around the longitudinal axis L. As shown in FIG. 9, the organic layer 41 is provided on the surface of the first gripping piece 13 with at least a region (first surface) in which the coating layer 51 is provided around an axis (peripheral surface) centered on the longitudinal axis L. It may be provided at the boundary portion (interface) between the region) and the region (second region) where the coating layer 51 is not provided.

In the present embodiment, both ends of the coating layer 51 are located on each of the side surfaces 20 about an axis (peripheral surface) around the longitudinal axis L. Therefore, on the surface of the first gripping piece 13, the boundary between the area where the coating layer 51 is provided and the area where the coating layer 51 is not provided is located on each of the side surfaces 20. In addition, the organic layer 41 is provided only at both ends of the region where the coating layer 51 is provided around each of the side surfaces 20 of the first gripping piece 13 about an axis (peripheral surface) around the longitudinal axis L. There is.

Also in the present embodiment, the coating layer 51 is bonded to the surface of the first gripping piece 13 via the organic layer 41 at the boundary between the region where the coating layer 51 is provided and the region where the coating layer 51 is not provided. Thereby, the adhesion strength of the coating layer 51 to the surface of the first gripping piece 13 is improved. This effectively prevents liquid or the like from invading between the coating layer 51 and the first gripping piece 13 from the interface between the coating layer 51 and the first gripping piece 13, and the coating layer 51 and the first gripping piece 13 The water tightness with the grip piece 13 is improved. By improving the water tightness between the coating layer 51 and the first grip piece 13, the durability of the treatment tool 1 is improved. Further, by improving the water tightness between the coating layer 51 and the first gripping piece 13, the adhesion strength of the coating layer 51 to the surface of the first gripping piece 13 can be achieved by performing the aforementioned subzero treatment or the like. It can be further improved.

Further, in the above-described embodiment and the like, the bipolar energy treatment tool (1) having the pair of gripping pieces (13, 14) and in which the electrodes are provided on each of the gripping pieces (13, 14) has been described. The structure which concerns on embodiment of invention etc is applicable also to a monopolar energy treatment tool. In this case, the energy treatment device includes a base material to which ultrasonic vibration is transmitted from the ultrasonic transducer, and the base material forms an end effector having a treatment surface and a back surface. And the above-mentioned organic layer (41) and a coating layer (51) are provided in the field which includes the back at least in the surface of a base material.

(Common configuration of the embodiment etc.)
The energy treatment tool (1) is formed of metal and provided on a surface of the base material (8, 13) provided with a treatment surface (17) for treating the treatment target, and the surface of the base material (8, 13). A coating layer (51) having thermal insulating properties and electrical insulating properties, provided between the surface of the base material (8, 13) and the coating layer (51), containing a coupling agent, the coupling Bonding the coating layer (51) to the surface of the matrix (8, 13) by bonding an agent to the surface of the matrix (8, 13) and the coating layer (51), respectively And an organic layer (41).

The present invention is not limited to the above embodiment, and can be variously modified in the implementation stage without departing from the scope of the invention. In addition, the embodiments may be implemented in combination as appropriate as possible, in which case the combined effect is obtained. Furthermore, the above embodiments include inventions of various stages, and various inventions can be extracted by an appropriate combination of a plurality of disclosed configuration requirements.

Claims

A base material provided with a treatment surface which is formed of metal and which treats the treatment target;
A coating layer provided on the surface of the base material and having heat insulation and electrical insulation;
The coating layer is provided between the surface of the base material and the coating layer and includes a coupling agent, and the coupling agent is bonded to the surface of the base material and the coating layer, respectively. An organic layer adhered to the surface of the matrix;
An energy treatment tool comprising:
The base material is formed of a titanium alloy.
The coupling agent is a titanate coupling agent,
The hydrolyzable group of the titanate coupling agent is bonded to the surface of the matrix.
The energy treatment tool of claim 1.
The coupling agent has an amine reactive group,
The organic layer forms a modified surface formed from an amine-based reactive group on the surface of the matrix;
The modified surface bonds with the coating layer,
The energy treatment tool according to claim 1.
The energy treatment device according to claim 1, wherein the coating layer is formed of a material containing PEEK resin.
The base material includes a first area covered by the coating layer, a second area exposed to the outside, and a boundary portion formed between the first area and the second area. Have
The energy treatment device according to claim 1, wherein the organic layer is provided at least at the boundary portion on the surface of the base material.
The energy treatment tool according to claim 1, further comprising a gripping member that can be opened and closed with respect to the base material and that can hold a treatment target with the treatment surface of the base material.
The energy treatment tool according to claim 6, wherein the base material and the holding member are supplied with electric energy so that a high frequency current flows between the treatment surface and the holding member.
The energy treatment tool according to claim 1, further comprising an ultrasonic transducer that generates ultrasonic vibration by supplying electric energy and transmits the ultrasonic vibration to the base material.
The base material includes a curved portion curved with respect to a longitudinal axis,
The energy treatment device according to claim 8, wherein the coating layer and the organic layer are provided in an area including the curved portion.
The energy treatment tool according to claim 8, wherein the coating layer and the organic layer are provided in a region including an antinode position of the ultrasonic vibration.
It further comprises a grasping member which can be opened and closed with respect to the base material and can hold a living tissue with the treatment surface of the base material,
The energy treatment tool according to claim 8, wherein the base material and the holding member are supplied with electric energy so that a high frequency current flows between the treatment surface and the holding member.
Forming a base material provided with a treatment surface for treating a treatment target from metal;
Forming an organic layer on the surface of the matrix by bonding a coupling structure of a coupling agent to the surface of the matrix;
Forming a coating layer having heat insulation and electrical insulation on the surface of the base material by bonding a coating agent to the surface of the organic layer;
Raising the adhesion strength between the coating layer and the surface of the base material by raising the temperature of the base material;
A method of manufacturing an energy treatment tool including:
The method of manufacturing an energy treatment device according to claim 12, wherein forming the base material further includes making the surface of the base material uneven.