JP2005205002A

JP2005205002A - Galvanosurgery apparatus

Info

Publication number: JP2005205002A
Application number: JP2004015744A
Authority: JP
Inventors: Takashi Hosobe; 孝細部; Taizo Kihara; 泰三木原
Original assignee: Aloka Co Ltd
Current assignee: Hitachi Ltd
Priority date: 2004-01-23
Filing date: 2004-01-23
Publication date: 2005-08-04

Abstract

<P>PROBLEM TO BE SOLVED: To provide a galvanosurgery apparatus, restraining discharge caused between a needle part of a hand-piece and an organic tissue and restraining inhibition of accelerated thermocoagulation. <P>SOLUTION: In this galvanosurgery apparatus, a high-frequency current is applied to the organic tissue to perform galvanosurgery operation to the organic tissue. The apparatus includes: a current-carrying part 8 for applying high-frequency current to the organic tissue; an acute part 10 provided at the tip of the current carrying part 8, the tip of which is pointed; and an insulating part 9 provided on the base of the current carrying part 8 to insulate a high-frequency current passage from the organic tissue. The acute part 10 is formed of an insulator 7 to be electrically insulated from the current-carrying part 8, and functioned as a discharge restraining part 11 for inhibiting an electric current from flowing between the needle part 3 and the organic tissue. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、経皮的な術式に使用される電気手術装置に関し、特に、放電抑制機能を備えた電気手術装置に関するものである。 The present invention relates to an electrosurgical apparatus used for a percutaneous operation, and more particularly to an electrosurgical apparatus having a discharge suppressing function.

経皮的な術式に使用される電気手術装置には種々のタイプのものがあり、例えば、図１７に示すような電気手術装置が一般に知られている。 There are various types of electrosurgical devices used in a percutaneous surgical method. For example, an electrosurgical device as shown in FIG. 17 is generally known.

すなわち、この電気手術装置４１は、生体組織に刺入される先端が尖った細い棒状（針状）の針部４３と、針部４３の一端部に設けられる針部４３よりも太い棒状の把持部４９とからなるハンドピース４２と、ハンドピース４２に高周波電圧（電流）を印加する高周波出力装置（図示せず）とを備えている。 That is, this electrosurgical device 41 has a thin rod-like (needle-like) needle portion 43 with a sharp tip inserted into a living tissue, and a rod-like gripper thicker than the needle portion 43 provided at one end of the needle portion 43. The handpiece 42 including the unit 49 and a high-frequency output device (not shown) for applying a high-frequency voltage (current) to the handpiece 42 are provided.

針部４３は、導電体からなる細い棒状（針状）の電極４４と、電極４４の表面の一部を被覆する絶縁体４５とからなるものであって、先端側に電極４４の表面が露出した通電部４６が設けられ、基端側に電極４４の表面が絶縁体４５によって被覆された絶縁部４７が設けられ、通電部４６を介して生体組織に高周波電圧（電流）が供給され、絶縁部４７により高周波電圧（電流）の供給経路と生体組織との間が絶縁される。通電部４６の先端部は、針部４３の生体組織への刺入を容易にするために、先端が尖った尖鋭部４８に形成されている。 The needle portion 43 is composed of a thin rod-like (needle-like) electrode 44 made of a conductor and an insulator 45 covering a part of the surface of the electrode 44, and the surface of the electrode 44 is exposed at the tip side. And an insulating portion 47 in which the surface of the electrode 44 is covered with an insulator 45 is provided on the proximal end side, and a high-frequency voltage (current) is supplied to the living tissue via the energizing portion 46 to insulate it. The part 47 insulates the high-frequency voltage (current) supply path from the living tissue. The distal end portion of the energization portion 46 is formed in a sharp portion 48 having a sharp distal end in order to facilitate the insertion of the needle portion 43 into the living tissue.

針部４３の電極４４と高周波出力装置との間は、電線（図示せず）を介して電気的に接続され、高周波出力装置から電線および電極４４を介して通電部４６に高周波電圧（電流）が供給される。 The electrode 44 of the needle portion 43 and the high frequency output device are electrically connected via an electric wire (not shown), and a high frequency voltage (current) is supplied from the high frequency output device to the energizing portion 46 via the electric wire and the electrode 44. Is supplied.

そして、上記のような構成の電気手術装置４１の針部４３を生体組織に刺入し、高周波出力装置から電線および電極４４を介して通電部４６に高周波電圧（電流）を供給し、通電部４６と通電部４６に生体組織を介して対向配置される対極板（図示せず）との間に高周波電圧（電流）を印加することにより、生体組織の患部に対して熱的凝固等の治療的処置を行うことができるものである。 Then, the needle part 43 of the electrosurgical device 41 having the above-described configuration is inserted into the living tissue, and a high-frequency voltage (current) is supplied from the high-frequency output device to the energization unit 46 via the electric wire and the electrode 44. By applying a high frequency voltage (current) between 46 and a counter electrode plate (not shown) disposed opposite to the energizing portion 46 via the living tissue, treatment such as thermal coagulation is performed on the affected portion of the living tissue. Treatment can be performed.

ところで、上記のような構成の電気手術装置４１によって生体組織の患部に対して熱的凝固等の治療的処置を行う場合に、対象箇所を熱的凝固させるために、比較的長時間高周波電圧（電流）を印加する必要があり、この際、通電部４６の周辺の温度が上昇して生体組織が乾燥することにより、通電部４６と生体組織との間に放電が発生することがあり、この放電により熱的凝固の促進が阻害され、充分な治療効果が得られないという場合がある。 By the way, when a therapeutic treatment such as thermal coagulation is performed on an affected part of a living tissue by the electrosurgical device 41 configured as described above, a high-frequency voltage ( Current) must be applied. At this time, the temperature around the energization unit 46 rises and the living tissue is dried, so that a discharge may occur between the energization unit 46 and the living tissue. There are cases where the promotion of thermal coagulation is hindered by electric discharge, and a sufficient therapeutic effect cannot be obtained.

一方、上記のような問題を解決するために、湿潤液を吐出させる機能を備えた電気手術装置や冷却機能を備えた電気手術装置が提供されている。 On the other hand, in order to solve the above problems, an electrosurgical device having a function of discharging a wetting liquid and an electrosurgical device having a cooling function are provided.

例えば、湿潤液を吐出させる機能を備えた電気手術装置の一例として、図１８に示すように、ハンドピース４２の針部４３の内部に湿潤液の流路５０を設け、この流路５０を把持部４９の内部およびチューブ（図示せず）を介して湿潤液のポンプ（図示せず）に接続するように構成したものが知られている。 For example, as an example of an electrosurgical apparatus having a function of discharging a wetting liquid, as shown in FIG. 18, a wetting liquid channel 50 is provided inside the needle portion 43 of the handpiece 42, and this channel 50 is gripped. What is configured to be connected to a wetting liquid pump (not shown) through the inside of the portion 49 and a tube (not shown) is known.

この場合、針部４３の通電部４６には、流路５０に連通する吐出口５１が設けられ、生体組織のインピーダンスの上昇、温度上昇により、ポンプからチューブ、流路５０および吐出口５１を介して湿潤液が吐出され、生体組織の乾燥による放電の発生を抑制している。通電部４６の先端部には、経皮的な刺入を容易にするための尖鋭部４８が設けられ、この尖鋭部４８は、通電部４６の一部として機能している。針部４３には、高周波出力装置（図示せず）から電線を介して送られる高周波電圧（電流）を絶縁する絶縁部４７が設けられ、この絶縁部４７により生体組織の意図しない熱的凝固を防止している。 In this case, the current-carrying portion 46 of the needle portion 43 is provided with a discharge port 51 that communicates with the flow channel 50, and from the pump through the tube, the flow channel 50 and the discharge port 51 due to an increase in impedance and temperature of the living tissue. Thus, the wetting liquid is discharged and the occurrence of discharge due to the drying of the living tissue is suppressed. A sharpened portion 48 for facilitating percutaneous insertion is provided at the distal end portion of the energizing portion 46, and the sharpened portion 48 functions as a part of the energized portion 46. The needle portion 43 is provided with an insulating portion 47 that insulates a high-frequency voltage (current) sent from a high-frequency output device (not shown) via an electric wire, and this insulating portion 47 allows unintended thermal coagulation of the living tissue. It is preventing.

しかしながら、上記のような構成の湿潤液を吐出させる機能を備えた電気手術装置４１にあっては、針部４３の尖鋭部４８が通電部４６の一部または全部として機能し、尖鋭部４８における電流密度が高く放電が起こりやすい構造であるため、充分な放電抑制効果が得られない。 However, in the electrosurgical apparatus 41 having the function of discharging the wetting liquid having the above-described configuration, the sharpened portion 48 of the needle portion 43 functions as a part or all of the energizing portion 46, and Since the current density is high and discharge is likely to occur, a sufficient discharge suppression effect cannot be obtained.

冷却機能を備えた電気手術装置の一例として、図１９に示すように、ハンドピース４２の針部４３および把持部４９の内部に、還流パイプ５２と針部還流経路５３とからなる冷却液還流構造５４を設け、この冷却液還流構造５４をチューブ（図示せず）を介して装置本体のポンプ部（図示せず）に接続したものが知られている。 As an example of an electrosurgical apparatus having a cooling function, as shown in FIG. 19, a coolant recirculation structure including a recirculation pipe 52 and a needle recirculation path 53 is provided inside the needle portion 43 and the grip portion 49 of the handpiece 42. It is known that the cooling liquid recirculation structure 54 is connected to a pump portion (not shown) of the apparatus main body via a tube (not shown).

この場合、生体組織のインピーダンス上昇により、冷却液を冷却液還流構造５４を介して還流し、生体組織の乾燥を防止し、放電の発生を抑制している。また、針部４３の先端部には、経皮的な刺入を容易にするための尖鋭部５５が設けられ、この尖鋭部５５は、通電部４６の一部として機能している。さらに、針部４３には、高周波出力装置（図示せず）から電線を介して送られる高周波電圧（電流）を絶縁する絶縁部４７が設けられ、生体組織の意図しない熱的凝固を防止している。 In this case, due to the increase in impedance of the living tissue, the coolant is recirculated through the coolant recirculation structure 54 to prevent the living tissue from being dried and to suppress the occurrence of discharge. In addition, a sharpened portion 55 for facilitating percutaneous insertion is provided at the distal end portion of the needle portion 43, and the sharpened portion 55 functions as a part of the energizing portion 46. Furthermore, the needle portion 43 is provided with an insulating portion 47 that insulates a high-frequency voltage (current) sent from a high-frequency output device (not shown) via an electric wire, thereby preventing unintentional thermal coagulation of the living tissue. Yes.

しかしながら、上記のような構成の冷却機能を備えた電気手術装置４１にあっては、尖鋭部５５における電流密度が高く放電が起こりやすく、冷却液のみでは、充分な放電抑制効果が得られない。 However, in the electrosurgical device 41 having the cooling function configured as described above, the current density in the sharp portion 55 is high and discharge is likely to occur, and a sufficient discharge suppression effect cannot be obtained only with the coolant.

電気手術装置に類似する技術として、径内視鏡的処置具としての電気メスが提供されている。この電気メスは、電極部の先端と基端に耐熱性電気絶縁体を設けたものであって、生体組織の切開、切除を目的としている。先端の絶縁部は、接触する正常な組織への悪影響を防止し、基端絶縁部により後端に備えた絶縁体の劣化を防止している（例えば、特許文献１参照。）。 As a technique similar to an electrosurgical apparatus, an electric knife as a diameter endoscopic treatment tool is provided. This electric knife is provided with a heat-resistant electrical insulator at the distal end and proximal end of an electrode part, and is intended for incision and excision of living tissue. The insulating part at the front end prevents an adverse effect on normal tissue that comes into contact, and the base end insulating part prevents deterioration of the insulator provided at the rear end (see, for example, Patent Document 1).

しかし、このような構成の電気メスにあっては、経皮的な術式を目的として、熱的凝固等の治療的処置を施す箇所には使用することができない。 However, the electric knife having such a configuration cannot be used at a place where a therapeutic treatment such as thermal coagulation is performed for the purpose of a percutaneous surgical procedure.

特開昭６３−１３００６１号公報Japanese Unexamined Patent Publication No. 63-130061

本発明の目的は、経皮的な術式を目的として有効に使用することができるとともに、生体組織の患部に対して熱的凝固等の治療的処置を行う場合に、対象箇所を熱的凝固させるために長時間高周波電圧（電流）を印加して温度上昇により生体組織が乾燥しても、生体組織との間に放電が発生して熱的凝固の促進が阻害されるようなことが少なく、充分な治療効果が得られる電気手術装置を提供することにある。 The object of the present invention can be effectively used for the purpose of a percutaneous surgical procedure, and when a therapeutic treatment such as thermal coagulation is performed on an affected part of a living tissue, the target site is thermally coagulated. Therefore, even when a high-frequency voltage (current) is applied for a long time and the living tissue is dried due to a temperature rise, discharge is generated between the living tissue and the promotion of thermal coagulation is less likely to occur. An object of the present invention is to provide an electrosurgical device capable of obtaining a sufficient therapeutic effect.

このような目的は、下記（１）〜（１１）の本発明により達成される。
（１）生体組織に対して高周波電流を印加し、前記生体組織の電気手術を行う電気手術装置であって、
前記生体組織に高周波電流を印加する通電部と、
該通電部の先端に設けられる先端が尖った形状の尖鋭部と、
該通電部の基端に設けられて高周波電流経路と前記生体組織とを絶縁する絶縁部とを備え、
前記尖鋭部の少なくとも一部に前記尖鋭部を前記通電部から電気的に絶縁する放電抑制部を設けたことを特徴とする電気手術装置。 Such an object is achieved by the present inventions (1) to (11) below.
(1) An electrosurgical apparatus that applies a high-frequency current to a living tissue and performs electrosurgery on the living tissue,
An energization unit for applying a high-frequency current to the living tissue;
A pointed portion with a sharp tip provided at the tip of the current-carrying portion; and
An insulating portion that is provided at a proximal end of the energization portion and insulates the high-frequency current path from the living tissue;
An electrosurgical device, wherein a discharge suppressing portion that electrically insulates the sharp portion from the energization portion is provided on at least a part of the sharp portion.

（２）前記尖鋭部の少なくとも一部を絶縁体で形成し、該絶縁体で形成した部分により前記放電抑制部を有する上記（１）に記載の電気手術装置。 (2) The electrosurgical device according to (1), wherein at least a part of the sharp portion is formed of an insulator, and the discharge suppressing portion is provided by the portion formed of the insulator.

（３）前記尖鋭部の全部および前記通電部の一部を絶縁体で形成し、該絶縁体で形成した部分により前記放電抑制部を有する上記（１）に記載の電気手術装置。 (3) The electrosurgical device according to (1), wherein the entire sharp portion and a part of the energizing portion are formed of an insulator, and the discharge suppressing portion is provided by the portion formed of the insulator.

（４）前記尖鋭部の少なくとも一部の表面を絶縁体で形成し、該絶縁体で形成した部分により前記放電抑制部を有する上記（１）に記載の電気手術装置。 (4) The electrosurgical device according to (1), wherein at least a part of the surface of the sharp portion is formed of an insulator, and the discharge suppressing portion is provided by a portion formed of the insulator.

（５）前記尖鋭部の全体の表面および前記通電部の一部の表面を絶縁体で形成し、該絶縁体で形成した部分により前記放電抑制部を有する上記（１）に記載の電気手術装置。 (5) The electrosurgical device according to (1), wherein an entire surface of the sharp portion and a part of the current-carrying portion are formed of an insulator, and the discharge suppressing portion is provided by the portion formed of the insulator. .

（６）前記尖鋭部と前記通電部との境界部に絶縁体からなる絶縁層を設け、該絶縁層と前記尖鋭部とにより前記放電抑制部を有する上記（１）に記載の電気手術装置。 (6) The electrosurgical device according to (1), wherein an insulating layer made of an insulator is provided at a boundary portion between the sharp portion and the energization portion, and the discharge suppressing portion is provided by the insulating layer and the sharp portion.

（７）前記尖鋭部の少なくとも一部を前記通電部から電気的に絶縁される部品の少なくとも一部で構成し、該部品により構成した前記尖鋭部の部分により前記放電抑制部を有する上記（１）に記載の電気手術装置。 (7) At least a part of the sharp part is constituted by at least a part of a component that is electrically insulated from the energization part, and the discharge suppression part is provided by the sharp part constituted by the part (1) ) Electrosurgical device.

（８）前記尖鋭部の全体の表面を絶縁体で形成し、前記通電部の表面に、前記尖鋭部と前記絶縁部との間を相互に連結する絶縁体からなる絶縁帯を設け、該絶縁帯と前記尖鋭部とによって前記放電抑制部を有する上記（１）に記載の電気手術装置。 (8) The entire surface of the pointed portion is formed of an insulator, and an insulating band made of an insulator that interconnects the pointed portion and the insulating portion is provided on the surface of the current-carrying portion, and the insulation The electrosurgical device according to (1), wherein the discharge suppressing portion is provided by a band and the sharp portion.

（９）前記通電部および前記絶縁部の内部に湿潤液を流通させる流路を設けるとともに、前記通電部の表面に前記流路に連通する少なくとも一つの吐出口を設け、前記流路に供給される湿潤液を前記吐出口から吐出可能とした上記（１）ないし（８）のいずれかに記載の電気手術装置。 (9) A flow path for allowing a wetting liquid to flow is provided inside the energization section and the insulating section, and at least one discharge port communicating with the flow path is provided on the surface of the energization section, and is supplied to the flow path. The electrosurgical device according to any one of (1) to (8), wherein the wetting liquid can be discharged from the discharge port.

（１０）前記通電部および前記絶縁部の内部に冷却液を流通させる流路を設けた上記（１）ないし（９）のいずれかに記載の電気手術装置。 (10) The electrosurgical device according to any one of (1) to (9), wherein a flow path for circulating a coolant is provided inside the energization unit and the insulating unit.

（１１）生体組織に対して高周波電流を印加し、前記生体組織の電気手術を行う電気手術装置であって、前記生体組織に高周波電流を印加する通電部と、内周側に前記通電部が可動自在に挿着されるとともに、内外周面が絶縁体で被覆される筒状の絶縁部と、前記通電部の先端部に設けられるとともに、前記絶縁部の先端から出没可能な尖鋭部とを備え、前記尖鋭部の少なくとも一部を絶縁体で形成し、該絶縁体で形成した前記尖鋭部の部分により前記通電部から電気的に絶縁する放電抑制部を有することを特徴とする電気手術装置。 (11) An electrosurgical apparatus that applies a high-frequency current to a living tissue to perform electrosurgery on the living tissue, and includes an energization unit that applies the high-frequency current to the living tissue, and the energization unit on an inner peripheral side. A cylindrical insulating part that is movably inserted and whose inner and outer peripheral surfaces are covered with an insulator, and a sharp part that is provided at the tip of the current-carrying part and that can protrude and retract from the tip of the insulating part. An electrosurgical device comprising: a discharge suppressing portion that at least part of the sharp portion is formed of an insulator, and is electrically insulated from the energization portion by the sharp portion formed of the insulator. .

本発明の電気手術装置によれば、通電部を介して生体組織に高周波電流を印加する際に、絶縁体からなる放電抑制部により、通電部の先端側に位置する尖鋭部と生体組織との間を電気的に絶縁することができる。従って、生体組織の患部に対して熱的凝固等の治療的処置を行う場合に、対象箇所を熱的凝固させるために長時間高周波電圧（電流）を印加して、通電部の周辺の温度が上昇して生体組織が乾燥しても、生体組織との間に放電が発生するのを抑制することができ、また、この放電の発生によって熱的凝固の促進が阻害されるのを抑制することができ、よって、充分な治療効果が得られることになる。 According to the electrosurgical device of the present invention, when applying a high-frequency current to the living tissue through the energization unit, the discharge suppression unit made of an insulator causes the sharp portion located on the distal end side of the energization unit and the living tissue. The space can be electrically insulated. Therefore, when a therapeutic treatment such as thermal coagulation is performed on an affected part of a living tissue, a high-frequency voltage (current) is applied for a long time in order to thermally coagulate the target portion, and the temperature around the energized part is Even if it rises and the living tissue is dried, it is possible to suppress the occurrence of discharge between the living tissue and to suppress the inhibition of thermal coagulation due to the occurrence of this discharge. Therefore, a sufficient therapeutic effect can be obtained.

以下、図面を参照しつつ本発明の実施の形態について説明する。
＜第１実施形態＞
図１〜図３には、それぞれ、本発明による電気手術装置の第１の実施の形態が示されていて、図１は、ハンドピースの平面図、図２は、図１のＡ−Ａ線断面図、図３は、図１のＢ−Ｂ線断面図である。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
<First Embodiment>
1 to 3 show a first embodiment of an electrosurgical device according to the present invention. FIG. 1 is a plan view of a handpiece, and FIG. 2 is a line AA in FIG. Sectional drawing and FIG. 3 are the BB sectional drawing of FIG.

すなわち、この電気手術装置１は、経皮的な術式に使用されるものであって、手術対象箇所の生体組織に刺入される先端が尖った細い棒状（針状）の針部３と、針部３の基端側に設けられる術者が把持する針部３よりも太い棒状の把持部１２とからなるハンドピース２と、ハンドピース２の針部３に高周波電圧（電流）を印加する高周波出力装置（図示せず）とを備えている。 That is, the electrosurgical device 1 is used in a percutaneous surgical method, and has a thin rod-like (needle-like) needle portion 3 having a sharp tip inserted into a living tissue at a surgical target site. A high-frequency voltage (current) is applied to the handpiece 2 that is provided on the proximal end side of the needle portion 3 and is composed of a rod-shaped gripping portion 12 that is thicker than the needle portion 3 held by an operator and the needle portion 3 of the handpiece 2 A high-frequency output device (not shown).

針部３は、導電体（例えば、ステンレス等の金属）からなる細い棒状（針状）の電極４の表面の一部を絶縁体７で被覆して、先端側に電極４の表面が露出した通電部８を設け、基端側に電極４の表面が絶縁体７により被覆された絶縁部９を設けたものである。 The needle portion 3 is formed by covering a part of the surface of a thin rod-like (needle-like) electrode 4 made of a conductor (for example, a metal such as stainless steel) with an insulator 7 so that the surface of the electrode 4 is exposed on the tip side. An energizing portion 8 is provided, and an insulating portion 9 in which the surface of the electrode 4 is covered with an insulator 7 is provided on the base end side.

電極４は、電線（図示せず）を介して高周波出力装置に電気的に接続され、これにより、高周波出力装置から電線および電極４を介して通電部８に至る高周波電圧（電流）の供給経路が形成される。 The electrode 4 is electrically connected to the high-frequency output device via an electric wire (not shown), whereby a high-frequency voltage (current) supply path from the high-frequency output device to the energization unit 8 via the electric wire and the electrode 4 Is formed.

絶縁部９は、電極４と生体組織との間を絶縁することにより、絶縁部９に対応する針部３の部分において、高周波電圧（電流）の供給経路と生体組織との間を絶縁する機能を有している。 The insulating unit 9 functions to insulate the high-frequency voltage (current) supply path from the biological tissue in the portion of the needle unit 3 corresponding to the insulating unit 9 by insulating the electrode 4 from the biological tissue. have.

電極４（針部３）は、先端側に位置する通電部８となる小経部５と、基端側に位置する小経部５よりも大径の大径部６との２段に形成（構成）されている。この大径部６（絶縁部９）は、小経部５と大径部６との段差部（境界）から基端方向に延在する小経部５の外周面に絶縁体７を設けて、小経部５より径が大きくなるよう形成されている。 The electrode 4 (needle portion 3) is formed in two stages, a small diameter portion 5 serving as a current-carrying portion 8 located on the distal end side and a large diameter portion 6 having a larger diameter than the small diameter portion 5 located on the proximal end side. (It is configured. The large-diameter portion 6 (insulating portion 9) is provided with an insulator 7 on the outer peripheral surface of the small-diameter portion 5 extending in the proximal direction from the step portion (boundary) between the small-diameter portion 5 and the large-diameter portion 6. The diameter is larger than that of the small diameter portion 5.

絶縁部９を構成する方法としては、例えば、セラミック系、ガラス系、高分子系等の絶縁体を電極４の表面にコーティングする方法、絶縁材料からなる筒状の加工品、成形品等を電極４に取り付ける方法等が挙げられる。 Examples of a method for configuring the insulating portion 9 include a method of coating the surface of the electrode 4 with an insulator such as a ceramic, glass, or polymer, a cylindrical processed product made of an insulating material, a molded product, etc. 4 or the like.

針部３の通電部８の先端には、先端が鋭く尖った円錐形状の尖鋭部１０が一体的に設けられ、この尖鋭部１０により電気手術の際に針部３を手術対象箇所の生体組織に刺入し易くしている。 A conical pointed portion 10 having a sharp pointed tip is integrally provided at the tip of the current-carrying portion 8 of the needle portion 3, and the sharpened portion 10 allows the needle portion 3 to be a living tissue at a surgical target site during electrosurgery. It is easy to insert into.

尖鋭部１０は、全体（全部）が絶縁体で形成され、針部３の通電部８よりも先端側の部分において、針部３と生体組織との間に電流が流れるのを阻止する放電抑制部１１として機能している。 The sharp portion 10 is entirely (all) formed of an insulator, and discharge suppression is performed to prevent current from flowing between the needle portion 3 and the living tissue at a portion of the needle portion 3 closer to the distal end than the energizing portion 8. It functions as the section 11.

放電抑制部１１である尖鋭部１０は、例えば、セラミック系、ガラス系、高分子系等からなる円錐形状の加工品、成形品等を通電部８の先端に一体的に連結されたり、絶縁処理を施した円錐形状の加工品、成形品等を通電部８の先端に一体的に連結する等の方法により、通電部８の先端に一体的に設けられたりして構成されている。 The sharpened portion 10 that is the discharge suppressing portion 11 is formed by, for example, connecting a cone-shaped processed product or molded product made of ceramic, glass, polymer, or the like to the tip of the current-carrying portion 8 or insulating treatment. The cone-shaped processed product, molded product or the like subjected to the above is integrally provided at the tip of the energizing portion 8 by a method such as integrally connecting to the tip of the energizing portion 8.

なお、放電抑制部１１である尖鋭部１０は、尖鋭部１０の一部を絶縁体で形成して放電抑制部１１を構成しても良いし、尖鋭部１０の全体と尖鋭部１０に連続する通電部８の一部を絶縁体で形成して放電抑制部１１を構成しても良い。 In addition, the sharp part 10 which is the discharge suppression part 11 may form the discharge suppression part 11 by forming a part of the sharp part 10 with an insulator, or the whole sharp part 10 and the sharp part 10 are continuous. The discharge suppressing unit 11 may be configured by forming a part of the energizing unit 8 with an insulator.

そして、上記のように構成したこの実施の形態による電気手術装置１の針部３を手術対象箇所の生体組織に刺入し、高周波出力装置を作動させて、高周波出力装置から電線および電極４を介して針部３の通電部８に高周波電圧（電流）を供給し、通電部８と生体組織を介して対向配置される対極板（図示せず）との間に高周波電圧（電流）を印加することにより、生体組織の患部に対して熱的凝固等の治療的処置を施すことができる。 And the needle part 3 of the electrosurgical device 1 according to this embodiment configured as described above is inserted into the living tissue of the surgical target site, the high frequency output device is operated, and the electric wire and the electrode 4 are connected from the high frequency output device. A high-frequency voltage (current) is supplied to the energizing unit 8 of the needle unit 3 via the electrode, and a high-frequency voltage (current) is applied between the energizing unit 8 and a counter electrode plate (not shown) disposed opposite to the living tissue. Thus, a therapeutic treatment such as thermal coagulation can be performed on the affected part of the living tissue.

この場合、対象箇所を熱的凝固させるために、比較的長時間高周波電圧（電流）を印加し、通電部８の周辺の温度が上昇して生体組織が乾燥しても、針部３の先端部には絶縁体からなる放電抑制部１１が設けられているので、通電部８の先端側において、針部３と生体組織との間に電流が流れるのを抑制でき、針部３と生体組織との間に放電が生じるのを抑制することができる。従って、放電の発生によって熱的凝固の促進が阻害されるようなことは少なく、充分な治療効果が得られることになる。 In this case, in order to thermally solidify the target portion, even if a high frequency voltage (current) is applied for a relatively long time and the temperature around the energization unit 8 rises and the living tissue is dried, the tip of the needle unit 3 Since the discharge suppression part 11 made of an insulator is provided in the part, current can be suppressed from flowing between the needle part 3 and the biological tissue on the distal end side of the energization part 8, and the needle part 3 and the biological tissue It is possible to suppress the occurrence of discharge between the two. Therefore, it is unlikely that the thermal coagulation is inhibited by the occurrence of electric discharge, and a sufficient therapeutic effect can be obtained.

＜第２実施形態＞
図４および図５には、それぞれ、本発明による電気手術装置の第２の実施の形態が示されていて、図４は、ハンドピースの平面図、図５は、図４のＣ−Ｃ線断面図である。 Second Embodiment
FIGS. 4 and 5 show a second embodiment of the electrosurgical device according to the present invention. FIG. 4 is a plan view of the handpiece, and FIG. 5 is a line CC in FIG. It is sectional drawing.

すなわち、この電気手術装置１は、針部３の通電部８の先端に円錐形状の芯部１３を一体的に設け、この芯部１３の表面に絶縁体を所定の厚みで一体的に設けて円錐形状の尖鋭部１０を形成し、この尖鋭部１０の絶縁体からなる部分を放電抑制部１１として機能させるように構成したものであって、その他の構成は前記第１の実施の形態と同様の構成を有しているので、前記第１の実施の形態と同様の部分には同一の番号を付してその詳細な説明を省略するものとする。 That is, this electrosurgical device 1 is provided with a conical core 13 integrally at the tip of the energizing portion 8 of the needle 3 and an insulator is integrally provided with a predetermined thickness on the surface of the core 13. A conical pointed portion 10 is formed, and a portion made of an insulator of the pointed portion 10 is configured to function as the discharge suppressing portion 11, and the other configurations are the same as in the first embodiment. Therefore, the same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.

芯部１３の表面に絶縁体を一体的に設ける方法としては、例えば、芯部１３の表面にセラミック系、ガラス系、高分子系等のコーティングを行う方法、芯部１３の表面に酸化処理等の化学的または物理的な処理を施す方法等が挙げられる。 Examples of a method for integrally providing an insulator on the surface of the core portion 13 include a method of coating the surface of the core portion 13 with ceramic, glass, polymer, etc., an oxidation treatment on the surface of the core portion 13, etc. And a method of applying chemical or physical treatment.

そして、この実施の形態に示す電気手術装置１にあっても、前記第１の実施の形態に示すものと同様に、針部３を手術対象箇所の生体組織に刺入し、高周波出力装置を作動させて、高周波出力装置から電線および電極４を介して針部３の通電部８に高周波電圧（電流）を供給し、通電部８と生体組織を介して対向配置される対極板との間に高周波電圧（電流）を印加することにより、生体組織の患部に対して熱的凝固等の治療的処置を施すことができる。 And even in the electrosurgical apparatus 1 shown in this embodiment, similarly to the one shown in the first embodiment, the needle 3 is inserted into the living tissue of the surgical target site, and the high-frequency output device is installed. When activated, a high-frequency voltage (current) is supplied from the high-frequency output device to the energizing portion 8 of the needle portion 3 through the electric wire and the electrode 4, and between the energizing portion 8 and the counter electrode disposed to face the living tissue. By applying a high-frequency voltage (current) to the body, a therapeutic treatment such as thermal coagulation can be performed on the affected part of the living tissue.

この場合、対象箇所を熱的凝固させるために、比較的長時間高周波電圧（電流）を印加し、通電部８の周辺の温度が上昇して生体組織が乾燥しても、針部３の先端部には絶縁体からなる放電抑制部１１が設けられているので、通電部８の先端側において、針部３と生体組織との間に電流が流れるのを抑制することができ、針部３と生体組織との間に放電が生じるのを抑制することができる。従って、放電の発生によって熱的凝固の促進が阻害されるのを抑制することができ、よって、充分な治療効果が得られることになる。 In this case, in order to thermally solidify the target portion, even if a high frequency voltage (current) is applied for a relatively long time and the temperature around the energization unit 8 rises and the living tissue is dried, the tip of the needle unit 3 Since the discharge suppression part 11 made of an insulator is provided in the part, it is possible to suppress a current from flowing between the needle part 3 and the living tissue on the distal end side of the energization part 8. It is possible to suppress discharge from occurring between the body and the living tissue. Therefore, it is possible to suppress the promotion of thermal coagulation due to the occurrence of electric discharge, and thus a sufficient therapeutic effect can be obtained.

なお、この実施の形態においては、芯部１３の表面の全体に絶縁体を設けて放電抑制部１１を構成したが、芯部１３の表面の一部に絶縁体を設けて放電抑制部１１を構成してもよいし、芯部１３の表面の全体と芯部１３に連続する通電部８の一部の表面に絶縁体を設けて放電抑制部１１を構成してもよい。 In this embodiment, the discharge suppressing unit 11 is configured by providing an insulator on the entire surface of the core 13. However, the discharge suppressing unit 11 is provided by providing an insulator on a part of the surface of the core 13. The discharge suppression unit 11 may be configured by providing an insulator on the entire surface of the core 13 and a part of the surface of the energization unit 8 continuous to the core 13.

＜第３実施形態＞
図６および図７には、それぞれ、本発明による電気手術装置の第３の実施の形態が示されていて、図６は、ハンドピースの平面図、図７は、図６のＤ−Ｄ線断面図である。 <Third Embodiment>
FIGS. 6 and 7 show a third embodiment of the electrosurgical device according to the present invention. FIG. 6 is a plan view of the handpiece, and FIG. 7 is a line DD in FIG. It is sectional drawing.

すなわち、この電気手術装置１は、針部３の通電部８の先端に金属材料からなる先端が尖った円錐形状または円錐台形状の尖鋭部１０を一体的に設け、この尖鋭部１０と通電部８との境界部に絶縁体からなる通電部８と同一外径の絶縁層１４を一体的に設け、絶縁層１４および尖鋭部１０により放電抑制部１１を構成したものであって、その他の構成は前記第１の実施の形態と同様の構成を有しているので、前記第１の実施の形態と同様の部分には同一の番号を付してその詳細な説明を省略するものとする。 That is, the electrosurgical device 1 is integrally provided with a conical or frustoconical sharp portion 10 made of a metal material at the distal end of the energizing portion 8 of the needle portion 3, and the sharp portion 10 and the energizing portion. An insulating layer 14 having the same outer diameter as that of the current-carrying portion 8 made of an insulator is integrally provided at the boundary with the insulating portion 8, and the discharge suppressing portion 11 is configured by the insulating layer 14 and the sharp portion 10. Since has the same configuration as that of the first embodiment, the same reference numerals are given to the same parts as those of the first embodiment, and the detailed description thereof will be omitted.

絶縁層１４を設ける方法としては、例えば、第１の実施の形態と同様に、セラミック系、ガラス系、高分子系等からなる加工品、成形品等を尖鋭部１０と通電部８との境界部に一体的に設ける等の方法が挙げられる。 As a method for providing the insulating layer 14, for example, as in the first embodiment, a processed product or a molded product made of ceramic, glass, polymer, or the like is used as a boundary between the sharp portion 10 and the current-carrying portion 8. The method of providing integrally in a part is mentioned.

この場合、対象箇所を熱的凝固させるために、比較的長時間高周波電圧（電流）を印加し、通電部８の周辺の温度が上昇して生体組織が乾燥しても、針部３の先端部には放電抑制部１１が設けられているので、通電部８の先端側において、針部３と生体組織との間に電流が流れるのを抑制でき、針部３と生体組織との間に放電が生じるのを抑制ことができる。従って、放電の発生によって熱的凝固の促進が阻害されるのを抑制することができ、よって、充分な治療効果が得られることになる。 In this case, in order to thermally solidify the target portion, even if a high frequency voltage (current) is applied for a relatively long time and the temperature around the energization unit 8 rises and the living tissue is dried, the tip of the needle unit 3 Since the discharge suppression part 11 is provided in the part, current can be suppressed from flowing between the needle part 3 and the biological tissue on the distal end side of the energization part 8, and between the needle part 3 and the biological tissue. The occurrence of discharge can be suppressed. Therefore, it is possible to suppress the promotion of thermal coagulation due to the occurrence of electric discharge, and thus a sufficient therapeutic effect can be obtained.

＜第４実施形態＞
図８および図９には、それぞれ、本発明による電気手術装置の第４の実施の形態が示されていて、図８は、ハンドピースの平面図、図９は、図８のＥ−Ｅ線断面図である。 <Fourth embodiment>
8 and 9 show a fourth embodiment of the electrosurgical device according to the present invention, FIG. 8 is a plan view of the handpiece, and FIG. 9 is a line EE in FIG. It is sectional drawing.

すなわち、この電気手術装置１は、針部３に高周波電圧（電流）の供給経路と電気的に絶縁された状態で設けられる部品、例えば温度センサ１６の一部によって尖鋭部１０の先端部を構成し、この温度センサ１６で構成した尖鋭部１０の先端部を放電抑制部１１として機能させるように構成したものであって、その他の構成は前記第１の実施の形態と同様の構成を有しているので、前記第１の実施の形態と同様の部分には同一の番号を付してその詳細な説明を省略するものとする。 In other words, the electrosurgical device 1 includes the tip portion of the sharpened portion 10 by a part of the needle unit 3 provided in a state of being electrically insulated from the high-frequency voltage (current) supply path, for example, a part of the temperature sensor 16. The tip portion of the sharp portion 10 constituted by the temperature sensor 16 is configured to function as the discharge suppressing portion 11, and other configurations have the same configurations as those of the first embodiment. Therefore, the same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.

この場合、針部３の電極４の中心部に貫通孔１５を設け、この貫通孔１５を介して温度センサ１６のリード線１７を外部に引き出している。なお、尖鋭部１０のうち温度センサ１６で構成された以外の部分は、前記第１の実施の形態に示すものと同様に、通電部８と同一材質によって形成されている。 In this case, a through hole 15 is provided at the center of the electrode 4 of the needle portion 3, and the lead wire 17 of the temperature sensor 16 is drawn out through the through hole 15. Note that the portion of the sharpened portion 10 other than that constituted by the temperature sensor 16 is formed of the same material as that of the energizing portion 8 in the same manner as that shown in the first embodiment.

尖鋭部１０の先端部を絶縁体で形成して温度センサ１６の一部とするには、例えば、セラミック系、ガラス系、高分子系等からなる円錐形状の加工品、成形品等を尖鋭部１０の先端部に一体的に設ける、絶縁処理を施した円錐形状の加工品、成形品等を尖鋭部１０の先端部に一体的に設ける等の方法が挙げられる。 In order to form the tip of the pointed portion 10 with an insulator to be a part of the temperature sensor 16, for example, a cone-shaped processed product or molded product made of ceramic, glass, polymer, or the like is sharpened. For example, a conical shaped processed product, a molded product, or the like that is provided integrally at the tip portion of the tip 10 is integrally provided at the tip portion of the sharp portion 10.

なお、この実施の形態においては、温度センサ１６の一部を絶縁体で形成して放電抑制部１１として機能させたが、温度センサ１６の全部を絶縁体で形成して放電抑制部１１として機能させてもよい。また、温度センサ１６に限らず、他の部品の一部または全部を放電抑制部１１として機能させてもよい。 In this embodiment, a part of the temperature sensor 16 is formed of an insulator and functions as the discharge suppressing unit 11. However, the entire temperature sensor 16 is formed of an insulator and functions as the discharge suppressing unit 11. You may let them. Further, not only the temperature sensor 16 but also a part or all of other components may function as the discharge suppressing unit 11.

＜第５実施形態＞
図１０および図１１には、それぞれ、本発明による電気手術装置の第５の実施の形態が示されていて、図１０は、ハンドピースの平面図、図１１は、図１０のＦ−Ｆ線断面図である。 <Fifth Embodiment>
FIGS. 10 and 11 show a fifth embodiment of the electrosurgical device according to the present invention. FIG. 10 is a plan view of the handpiece, and FIG. 11 is a line FF in FIG. It is sectional drawing.

すなわち、この電気手術装置１は、針部３の通電部８の先端に円錐形状の芯部１３を一体的に設けるとともに、通電部８の外周面の一部に軸方向に溝１８を周方向に所定の間隔ごとに複数本（本実施形態では、６本）設け、芯部１３の表面および電極４の基端側の表面および溝１８内に絶縁帯１９を所定の厚みで一体的に設け、それぞれ円錐形状の尖鋭部１０と絶縁部９との間を連結する絶縁帯１９を形成し、絶縁帯１９の一部と尖鋭部１０とによって放電制御部１１を構成したものである。その他の構成は前記第１の実施の形態と同様の構成を有しているので、前記第１の実施の形態と同様の部分には同一の番号を付してその詳細な説明を省略するものとする。 That is, the electrosurgical apparatus 1 is provided with a conical core 13 integrally at the tip of the energization unit 8 of the needle unit 3 and a groove 18 in the axial direction in a part of the outer peripheral surface of the energization unit 8 in the circumferential direction. A plurality of (six in this embodiment) are provided at predetermined intervals, and an insulating band 19 is integrally provided with a predetermined thickness in the surface of the core portion 13, the base end surface of the electrode 4, and the groove 18. The insulating band 19 that connects between the conical sharp portion 10 and the insulating portion 9 is formed, and the discharge control portion 11 is configured by a part of the insulating band 19 and the sharp portion 10. Since other configurations have the same configurations as those of the first embodiment, the same parts as those of the first embodiment are denoted by the same reference numerals and detailed description thereof is omitted. And

この場合、芯部１３の表面、絶縁部９、絶縁帯１９の表面に絶縁体を一体的に設ける方法としては、例えば、セラミック系、ガラス系、高分子系等のコーティングを施す方法、酸化処理等の化学的、物理的な処理を施す等の方法によって形成される。 In this case, as a method of integrally providing an insulator on the surface of the core portion 13, the insulating portion 9, and the surface of the insulating band 19, for example, a coating method such as ceramic-based, glass-based, or polymer-based, oxidation treatment It is formed by a method such as chemical or physical treatment.

この場合、対象箇所を熱的凝固させるために、比較的長時間高周波電圧（電流）を印加し、通電部８の周辺の温度が上昇して生体組織が乾燥しても、針部３の先端部には放電抑制部１１が設けられているので、通電部８の先端側において、針部３と生体組織との間に電流が流れるのを抑制でき、針部３と生体組織との間に放電が生じるのを抑制することができる。従って、放電の発生によって熱的凝固の促進が阻害されるのを抑制することができ、よって、充分な治療効果が得られることになる。 In this case, in order to thermally solidify the target portion, even if a high frequency voltage (current) is applied for a relatively long time and the temperature around the energization unit 8 rises and the living tissue is dried, the tip of the needle unit 3 Since the discharge suppression part 11 is provided in the part, current can be suppressed from flowing between the needle part 3 and the biological tissue on the distal end side of the energization part 8, and between the needle part 3 and the biological tissue. It is possible to suppress the occurrence of discharge. Therefore, it is possible to suppress the promotion of thermal coagulation due to the occurrence of electric discharge, and thus a sufficient therapeutic effect can be obtained.

＜第６実施形態＞
図１２には、本発明による電気手術装置の第６の実施の形態が示されていて、図１２は、ハンドピースを示す断面図である。 <Sixth Embodiment>
FIG. 12 shows a sixth embodiment of an electrosurgical device according to the present invention, and FIG. 12 is a sectional view showing a handpiece.

すなわち、この電気手術装置１は、針部３の電極４に筒状のものを使用し、電極４の内側に湿潤液を流通させる流路２０を形成し、電極４の通電部８に流路２０内外を貫通する複数の吐出口２１を設け、湿潤液供給源（図示せず）から針部３の流路２０および吐出口２１を介して湿潤液を吐出可能に構成したものであって、その他の構成は前記第１の実施の形態と同様の構成を有しているので、前記第１の実施の形態と同様の部分には同一の番号を付してその詳細な説明を省略するものとする。 That is, this electrosurgical device 1 uses a cylindrical one for the electrode 4 of the needle portion 3, forms a flow path 20 for circulating the wetting liquid inside the electrode 4, and sets the flow path to the energizing portion 8 of the electrode 4. 20 provided with a plurality of discharge ports 21 penetrating inside and outside, and configured to be able to discharge the wetting liquid from the wetting liquid supply source (not shown) through the flow path 20 and the discharge port 21 of the needle portion 3, Since other configurations have the same configurations as those of the first embodiment, the same parts as those of the first embodiment are denoted by the same reference numerals and detailed description thereof is omitted. And

湿潤液は、加熱乾燥した生体組織に水分を補給する効果、冷却効果、導電性を高めて急激な加熱乾燥を抑制する効果を奏するものであって、例えば、生理食塩水、電解質補製剤等が挙げられる。 The wetting liquid has the effect of replenishing moisture to the heat-dried biological tissue, the cooling effect, and the effect of increasing the conductivity and suppressing rapid heat-drying. For example, physiological saline, electrolyte supplements, etc. Can be mentioned.

そして、上記のように構成したこの実施の形態による電気手術装置１の針部３を手術対象箇所の生体組織に刺入し、高周波出力装置を作動させて、高周波出力装置から電線および電極４を介して針部３の通電部８に高周波電圧（電流）を供給し、通電部８と生体組織を介して対向配置される対極板との間に高周波電圧（電流）を印加することにより、生体組織の患部に対して熱的凝固等の治療的処置を施すことができ、さらに、効果的に治療的処置を施すことができる。 And the needle part 3 of the electrosurgical device 1 according to this embodiment configured as described above is inserted into the living tissue of the surgical target site, the high frequency output device is operated, and the electric wire and the electrode 4 are connected from the high frequency output device. A high-frequency voltage (current) is supplied to the energization unit 8 of the needle unit 3 through the living body, and a high-frequency voltage (current) is applied between the energization unit 8 and the counter electrode disposed oppositely via the living tissue. A therapeutic treatment such as thermal coagulation can be performed on the affected part of the tissue, and further, a therapeutic treatment can be effectively performed.

さらに、通電部８の吐出口２１から湿潤液を供給することにより、加熱乾燥した生体組織に水分を補給する効果、冷却効果、導電性を高めて急激な加熱乾燥を抑制する効果が得られるので、更に、効果的に治療的処置を施すことができる。 Furthermore, by supplying the wetting liquid from the discharge port 21 of the energization unit 8, the effect of supplying moisture to the heat-dried biological tissue, the cooling effect, and the effect of increasing the conductivity and suppressing the rapid heat-drying can be obtained. In addition, therapeutic treatment can be effectively performed.

＜第７実施形態＞
図１３〜図１５には、それぞれ、本発明による電気手術装置の第７の実施の形態が示されていて、図１３は、ハンドピースの平面図、図１４は、図１３のＧ部の拡大断面図、図１５は、図１３の部分拡大断面図である。 <Seventh embodiment>
FIGS. 13 to 15 show a seventh embodiment of the electrosurgical device according to the present invention, FIG. 13 is a plan view of the handpiece, and FIG. 14 is an enlarged view of a portion G in FIG. FIG. 15 is a partial enlarged cross-sectional view of FIG. 13.

すなわち、この電気手術装置２２は、手術対象箇所の生体組織に刺入される針部２４と、針部２４の基端側に設けられる術者が把持する針部２４よりも太い棒状の把持部３５とからなるハンドピース２３と、ハンドピース２３の針部２４に高周波電圧（電流）を印加する高周波出力装置（図示せず）とを備えている。 That is, the electrosurgical device 22 includes a needle portion 24 inserted into a living tissue at a surgical target location, and a rod-shaped gripping portion thicker than the needle portion 24 provided on the proximal end side of the needle portion 24 and held by an operator. 35 and a high frequency output device (not shown) for applying a high frequency voltage (current) to the needle portion 24 of the hand piece 23.

針部２４は、導電体（例えば、ステンレス等の金属）からなる先端が尖った細い筒状の外針２５と、外針２５の内側に可動自在に設けられて、先端部が外針２５から外方に展開可能な複数本（本実施形態では、２本）の導電体からなる内針２９とを備えている。 The needle portion 24 is provided with a thin cylindrical outer needle 25 made of a conductor (for example, a metal such as stainless steel) with a sharp tip, and is movably provided inside the outer needle 25, and the tip portion extends from the outer needle 25. A plurality of inner needles 29 (two in this embodiment) that can be expanded outward are provided.

外針２５は、金属からなる筒状の芯材２６の内外面を絶縁体２７で被覆して絶縁部２８を構成し、この絶縁部２８により生体組織と高周波電圧（電流）の供給経路とを絶縁するように構成したものであって、絶縁部２８を構成する方法としては、例えば、セラミック系、ガラス系、高分子系等の絶縁体を芯材２６の表面にコーティングする方法等が挙げられる。 The outer needle 25 forms an insulating portion 28 by covering the inner and outer surfaces of a cylindrical core material 26 made of metal with an insulator 27, and the insulating portion 28 provides a living tissue and a supply path for high-frequency voltage (current). Examples of a method of forming the insulating portion 28 that are configured to insulate include a method of coating the surface of the core material 26 with an insulator such as ceramic, glass, or polymer. .

内針２９は、電極３０として機能するものであって、先端部が所定の角度で屈曲されて、屈曲された部分の先端部に先端が尖った尖鋭部３１が設けられ、この尖鋭部３１により、電気手術の際に内針２９を手術対象箇所の生体組織に刺入し易くしている。内針２９の尖鋭部３１の根元部には、生体組織に高周波電圧（電流）を供給する通電部３２が設けられている。 The inner needle 29 functions as an electrode 30, and the tip portion is bent at a predetermined angle, and the tip portion of the bent portion is provided with a pointed portion 31 having a pointed tip. In the electrosurgical operation, the inner needle 29 is easily inserted into the living tissue at the surgical target site. An energization section 32 that supplies a high-frequency voltage (current) to the living tissue is provided at the root of the sharpened portion 31 of the inner needle 29.

内針２９は、電線（図示せず）を介して高周波出力装置に電気的に接続され、これにより、高周波出力装置から電線および内針２９（電極３０）を介して通電部３２に至る高周波電圧（電流）の供給経路が形成される。 The inner needle 29 is electrically connected to the high-frequency output device via an electric wire (not shown), whereby a high-frequency voltage from the high-frequency output device to the energizing unit 32 via the electric wire and the inner needle 29 (electrode 30). A (current) supply path is formed.

内針２９の尖鋭部３１は、表面が絶縁体で被覆され、その部分に内針２９と生体組織との間に電流が流れるのを阻止する放電抑制部３３が形成される。 The sharpened portion 31 of the inner needle 29 is coated with an insulator on the surface, and a discharge suppressing portion 33 that prevents current from flowing between the inner needle 29 and the living tissue is formed in that portion.

放電抑制部３３は、例えば、尖鋭部３１の表面にセラミック系、ガラス系、高分子系等のコーティングを施す、尖鋭部３１の表面に酸化処理等の化学的または物理的な処理を施す等の方法によって形成される。 For example, the discharge suppressing unit 33 may be coated with ceramic, glass, polymer, or the like on the surface of the sharp part 31, or may be subjected to chemical or physical treatment such as oxidation treatment on the surface of the sharp part 31. Formed by the method.

そして、上記のように構成したこの実施の形態による電気手術装置２２の針部２４を手術対象箇所の生体組織に刺入し、高周波出力装置を作動させて、高周波出力装置から電線および電極３０を介して針部２４の内針２９の通電部３２に高周波電圧（電流）を供給し、通電部３２と生体組織を介して対向配置される対極板との間に高周波電圧（電流）を印加することにより、生体組織の患部に対して熱的凝固等の治療的処置を施すことができる。 Then, the needle portion 24 of the electrosurgical device 22 according to this embodiment configured as described above is inserted into the living tissue of the surgical target site, the high frequency output device is operated, and the electric wire and the electrode 30 are connected from the high frequency output device. The high-frequency voltage (current) is supplied to the energizing portion 32 of the inner needle 29 of the needle portion 24, and the high-frequency voltage (current) is applied between the energizing portion 32 and the counter electrode disposed opposite to the living tissue. Thus, a therapeutic treatment such as thermal coagulation can be performed on the affected part of the living tissue.

この場合、対象箇所を熱的凝固させるために、比較的長時間高周波電圧（電流）を印加し、通電部３２の周辺の温度が上昇して生体組織が乾燥しても、針部２４の内針２９の先端部には絶縁体からなる放電抑制部３３が設けられているので、通電部３２の先端側において、内針２９と生体組織との間に電流が流れるのを抑制することができ、内針２９と生体組織との間に放電が生じるのを抑制することができる。従って、放電の発生によって熱的凝固の促進が阻害されるのを抑制することができ、よって、充分な治療効果が得られることになる。 In this case, even if a high-frequency voltage (current) is applied for a relatively long time in order to thermally solidify the target portion and the temperature around the energization unit 32 rises and the living tissue is dried, Since the discharge suppressing portion 33 made of an insulator is provided at the distal end portion of the needle 29, it is possible to suppress a current from flowing between the inner needle 29 and the living tissue on the distal end side of the energizing portion 32. It is possible to suppress the occurrence of discharge between the inner needle 29 and the living tissue. Therefore, it is possible to suppress the promotion of thermal coagulation due to the occurrence of electric discharge, and thus a sufficient therapeutic effect can be obtained.

＜第８実施形態＞
図１６には、本発明による電気手術装置の第８実施形態（ハンドピースの平面図）が示されている。 <Eighth Embodiment>
FIG. 16 shows an electrosurgical apparatus according to an eighth embodiment (plan view of a handpiece) according to the present invention.

図１６に示す電気手術装置６１は、ハンドピース２の針部３および把持部１２（通電部８および絶縁部９）の内部に、還流パイプ６２と冷却液を流通する針部還流経路（流路）６３とからなる冷却液還流構造６４を設け、この冷却液還流構造６４をチューブ（図示せず）を介して装置本体のポンプ部（図示せず）に接続されている。その他の構成は前記第１の実施の形態と同様の構成を有しているので、前記第１の実施の形態と同様の部分には同一の番号を付してその詳細な説明を省略するものとする。 An electrosurgical device 61 shown in FIG. 16 has a needle part return path (flow path) through which a reflux pipe 62 and a coolant flow inside the needle part 3 and the grip part 12 (the energization part 8 and the insulating part 9) of the handpiece 2. ) 63 is provided, and the coolant reflux structure 64 is connected to a pump portion (not shown) of the apparatus main body via a tube (not shown). Since other configurations have the same configurations as those of the first embodiment, the same parts as those of the first embodiment are denoted by the same reference numerals and detailed description thereof is omitted. And

通電部８の先端部には、経皮的な刺入を容易にするための尖鋭部１０が設けられ、この尖鋭部１０の先端部には、絶縁体からなる放電抑制部１１が設けられている。 A sharpened portion 10 for facilitating percutaneous insertion is provided at the distal end portion of the energizing portion 8, and a discharge suppressing portion 11 made of an insulator is provided at the distal end portion of the sharpened portion 10. Yes.

針部３には、高周波出力装置（図示せず）から電線を介して送られる高周波電圧（電流）を絶縁する絶縁部９が設けられ、この絶縁部９により生体組織の意図しない熱的凝固を抑制している。 The needle part 3 is provided with an insulating part 9 that insulates a high-frequency voltage (current) sent from a high-frequency output device (not shown) via an electric wire, and the insulating part 9 causes unintended thermal coagulation of the living tissue. Suppressed.

このような構成により、対象箇所を熱的凝固させるために、比較的長時間高周波電圧（電流）を印加し、通電部８の周辺の温度が上昇して生体組織が乾燥しても、針部３の先端部には、絶縁体からなる放電抑制部１１が設けられているので、通電部８の先端側において、針部３と生体組織との間に電流が流れるのを抑制することができ、針部３と生体組織との間に放電が生じるのを抑制することができる。従って、放電の発生によって熱的凝固の促進が阻害されるのを抑制することができ、よって、充分な治療効果が得られることになる。さらに、還流パイプ６２と針部還流経路６３とからなる冷却液還流構造６４を介して、冷却液を還流することにより、加熱乾燥した生体組織を冷却する効果が得られるので、さらに効果的に治療的処置を施すことができる。 With such a configuration, in order to thermally coagulate the target portion, even if a high frequency voltage (current) is applied for a relatively long time and the temperature around the energizing portion 8 rises and the living tissue is dried, the needle portion 3 is provided with a discharge suppressing portion 11 made of an insulator, so that current can be suppressed from flowing between the needle portion 3 and the living tissue on the distal end side of the energizing portion 8. In addition, it is possible to suppress discharge from occurring between the needle portion 3 and the living tissue. Therefore, it is possible to suppress the promotion of thermal coagulation due to the occurrence of electric discharge, and thus a sufficient therapeutic effect can be obtained. Furthermore, since the cooling liquid is refluxed through the cooling liquid reflux structure 64 including the reflux pipe 62 and the needle reflux path 63, an effect of cooling the heat-dried biological tissue can be obtained, so that the treatment can be performed more effectively. Treatment can be performed.

以上、本発明の電気手術装置を図示の実施形態について説明したが、本発明は、これに限定されるものではなく、電気手術装置を構成する各部は、同様の機能を発揮し得る任意の構成のものと置換することができる。また、任意の構成物が付加されていてもよい。 As mentioned above, although the electrosurgical device of the present invention has been described with respect to the illustrated embodiment, the present invention is not limited to this, and each component constituting the electrosurgical device can have any configuration that can exhibit the same function. Can be substituted. Moreover, arbitrary components may be added.

また、本発明の電気手術装置は、前記各実施形態のうちの、任意の２以上の構成（特徴）を組み合わせたものであってもよい。 In addition, the electrosurgical device of the present invention may be a combination of any two or more configurations (features) of the above embodiments.

本発明による電気手術装置の第１実施形態の平面図である。1 is a plan view of a first embodiment of an electrosurgical device according to the present invention. FIG. 図１のＡ−Ａ線断面図である。It is the sectional view on the AA line of FIG. 図１のＢ−Ｂ線断面図である。It is the BB sectional view taken on the line of FIG. 本発明による電気手術装置の第２実施形態の平面図である。It is a top view of 2nd Embodiment of the electrosurgical apparatus by this invention. 図４のＣ−Ｃ線断面図である。It is CC sectional view taken on the line of FIG. 本発明による電気手術装置の第３実施形態の平面図である。It is a top view of 3rd Embodiment of the electrosurgical apparatus by this invention. 図６のＤ−Ｄ線断面図である。It is the DD sectional view taken on the line of FIG. 本発明による電気手術装置の第４実施形態の平面図である。It is a top view of 4th Embodiment of the electrosurgical apparatus by this invention. 図８のＥ−Ｅ線断面図である。It is the EE sectional view taken on the line of FIG. 本発明による電気手術装置の第５実施形態の平面図である。It is a top view of 5th Embodiment of the electrosurgical apparatus by this invention. 図１０のＦ−Ｆ線断面図である。It is the FF sectional view taken on the line of FIG. 本発明による電気手術装置の第６実施形態の断面図である。It is sectional drawing of 6th Embodiment of the electrosurgical apparatus by this invention. 本発明による電気手術装置の第７実施形態の平面図である。It is a top view of 7th Embodiment of the electrosurgical apparatus by this invention. 図１３のＧ部の断面図である。It is sectional drawing of the G section of FIG. 図１３の部分拡大断面図である。It is a partial expanded sectional view of FIG. 本発明による電気手術装置の第８実施形態の平面図である。It is a top view of 8th Embodiment of the electrosurgical apparatus by this invention. 従来の電気手術装置の一例の平面図である。It is a top view of an example of the conventional electrosurgical apparatus. 従来の電気手術装置の一例の平面図である。It is a top view of an example of the conventional electrosurgical apparatus. 従来の電気手術装置の一例の平面図である。It is a top view of an example of the conventional electrosurgical apparatus.

Explanation of symbols

１電気手術装置
２ハンドピース
３針部
４電極
５小径部
６大径部
７絶縁体
８通電部
９絶縁部
１０尖鋭部
１１放電抑制部
１２把持部
１３芯部
１４絶縁層
１５貫通孔
１６温度センサ
１７リード線
１８溝
１９絶縁帯
２０流路
２１吐出口
２２電気手術装置
２３ハンドピース
２４針部
２５外針
２６芯材
２７絶縁体
２８絶縁部
２９内針
３０電極
３１尖鋭部
３２通電部
３３放電抑制部
３５把持部
４１電気手術装置
４２ハンドピース
４３針部
４４電極
４５絶縁体
４６通電部
４７絶縁部
４８尖鋭部
４９把持部
５０流路
５１吐出口
５２還流パイプ
５３針部還流経路
５４冷却液還流構造
５５尖鋭部
６１電気手術装置
６２還流パイプ
６３針部還流経路
６４冷却液還流構造 DESCRIPTION OF SYMBOLS 1 Electrosurgical device 2 Handpiece 3 Needle part 4 Electrode 5 Small diameter part 6 Large diameter part 7 Insulator 8 Current supply part 9 Insulation part 10 Sharp part 11 Discharge suppression part 12 Grasping part 13 Core part 14 Insulating layer 15 Through-hole 16 Temperature sensor 17 Lead wire 18 Groove 19 Insulation band 20 Flow path 21 Discharge port 22 Electrosurgical device 23 Handpiece 24 Needle part 25 Outer needle 26 Core material 27 Insulator 28 Insulation part 29 Inner needle 30 Electrode 31 Sharp part 32 Current supply part 33 Discharge suppression Part 35 Grasping part 41 Electrosurgical device 42 Handpiece 43 Needle part 44 Electrode 45 Insulator 46 Energizing part 47 Insulating part 48 Sharp part 49 Grasping part 50 Flow path 51 Discharge port 52 Reflux pipe 53 Needle part reflux path 54 Coolant reflux structure 55 Sharp Point 61 Electrosurgical Device 62 Reflux Pipe 63 Needle Reflux Path 64 Coolant Reflux Structure

Claims

An electrosurgical apparatus that applies a high-frequency current to a living tissue and performs electrosurgery on the living tissue,
An energization unit for applying a high-frequency current to the living tissue;
A pointed portion with a sharp tip provided at the tip of the current-carrying portion; and
An insulating portion that is provided at a proximal end of the energization portion and insulates the high-frequency current path from the living tissue;
An electrosurgical device, wherein a discharge suppressing portion that electrically insulates the sharp portion from the energization portion is provided on at least a part of the sharp portion.

The electrosurgical device according to claim 1, wherein at least a part of the sharp portion is formed of an insulator, and the discharge suppressing portion is provided by the portion formed of the insulator.

The electrosurgical device according to claim 1, wherein all of the sharp portions and a part of the energization portion are formed of an insulator, and the discharge suppressing portion is formed by a portion formed of the insulator.

The electrosurgical device according to claim 1, wherein at least a part of the surface of the sharp portion is formed of an insulator, and the discharge suppressing portion is provided by a portion formed of the insulator.

The electrosurgical device according to claim 1, wherein an entire surface of the sharp portion and a partial surface of the energization portion are formed of an insulator, and the discharge suppressing portion is formed by a portion formed of the insulator.

The electrosurgical device according to claim 1, wherein an insulating layer made of an insulator is provided at a boundary portion between the sharp portion and the energization portion, and the discharge suppressing portion is provided by the insulating layer and the sharp portion.

The at least part of the sharp part is configured by at least a part of a part that is electrically insulated from the current-carrying part, and the discharge suppression part is provided by a part of the sharp part that is configured by the part. Electrosurgical device.

An entire surface of the sharp portion is formed of an insulator, and an insulating band made of an insulator is provided on the surface of the energizing portion to interconnect the sharp portion and the insulating portion. The electrosurgical device according to claim 1, wherein the discharge suppressing portion is provided by a sharp portion.

A wetting liquid that is supplied to the flow path by providing a flow path through which the wetting liquid flows inside the energizing section and the insulating section, and providing at least one discharge port communicating with the flow path on the surface of the energizing section. The electrosurgical device according to any one of claims 1 to 8, wherein the device can be discharged from the discharge port.

The electrosurgical device according to any one of claims 1 to 9, wherein a flow path through which a coolant flows is provided inside the energization unit and the insulating unit.

An electrosurgical apparatus that applies a high-frequency current to a living tissue to perform electrosurgery on the living tissue, and an energization unit that applies the high-frequency current to the living tissue, and the energization unit is movable on an inner peripheral side A cylindrical insulating portion whose inner and outer peripheral surfaces are covered with an insulator, and a sharpened portion that can be projected and retracted from the distal end of the insulating portion, and is provided at the distal end portion of the insulating portion, An electrosurgical device comprising: a discharge suppressing portion that at least part of a sharp portion is formed of an insulator, and is electrically insulated from the current-carrying portion by the sharp portion formed of the insulator.