JP2925036B2 - Expandable bipolar electrode Cored telescopic for non-invasive treatment - Google Patents

Expandable bipolar electrode Cored telescopic for non-invasive treatment

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JP2925036B2
JP2925036B2 JP7519960A JP51996094A JP2925036B2 JP 2925036 B2 JP2925036 B2 JP 2925036B2 JP 7519960 A JP7519960 A JP 7519960A JP 51996094 A JP51996094 A JP 51996094A JP 2925036 B2 JP2925036 B2 JP 2925036B2
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electrode
bipolar
bipolar electrode
outer surface
insulator
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JPH09501859A (en
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シルベストリーニ,トーマス・エイ
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ヴァリーラブ・インコーポレーテッド
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Priority to PCT/IB1994/000424 priority patent/WO1995020360A1/en
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/04Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
    • A61B18/12Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
    • A61B18/14Probes or electrodes therefor
    • A61B18/1492Probes or electrodes therefor having a flexible, catheter-like structure, e.g. for heart ablation
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/04Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
    • A61B18/12Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
    • A61B18/14Probes or electrodes therefor
    • A61B18/1485Probes or electrodes therefor having a short rigid shaft for accessing the inner body through natural openings
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/04Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
    • A61B18/12Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
    • A61B18/14Probes or electrodes therefor
    • A61B18/1402Probes for open surgery
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/04Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
    • A61B18/12Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
    • A61B18/14Probes or electrodes therefor
    • A61B18/1482Probes or electrodes therefor having a long rigid shaft for accessing the inner body transcutaneously in minimal invasive surgery, e.g. laparoscopy
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B2018/00053Mechanical features of the instrument of device
    • A61B2018/00184Moving parts
    • A61B2018/00196Moving parts reciprocating lengthwise

Description

【発明の詳細な説明】 発明の背景 本発明は、双極型電極の分野に関し、身体の組織又は腫瘍のような新生物を乾燥させ、又は切除する高周波エネルギを供給するため治療方法で使用される双極型電極カテーテルに関する。 DETAILED DESCRIPTION OF THE INVENTION BACKGROUND OF THE INVENTION The present invention relates to the field of bipolar electrode, dried neoplasms such as body tissue or tumors, or used in therapeutic methods for supplying a high-frequency energy to ablate about bipolar electrode catheter.

従来の双極型電極は、一対のピンセットのような構造とされ、各ピンセットのアームが電極の一つの極として機能するようにしてある。 Conventional bipolar electrode is structured as a pair of tweezers, it is as arms of each tweezers function as one pole of the electrodes. 組織、又は腫瘍のような新生物は、かかる電極を使用して、除去しようとする塊をピンセットで把み、ピンセットの先端部の間に、及び切除しようとする塊に電流を流し、これにより、その塊が乾燥され、又は切除される。 Tissue, or neoplasms such as tumors, using such electrodes, viewed bunch mass to be removed with tweezers, between the tip of the tweezers, and flowing a current to the mass to be excised, thereby , the mass is dried, or is ablated. この型式の双極型電極は、一般に、大きく且つ取り扱い難く、適度の大きさの塊を把み得るようにするためには、相当な距離、拡がることのできるピンセットを必要とする。 Bipolar electrode of this type, generally, large and difficult to handle, to adapted to be viewed bunch moderate size masses of considerable distances, requiring forceps that can be spread. このため、従来型式の双極型電極は、除去しようとする組織、又は腫瘍の部位にピンセットが入るのに十分な大きさの外科用開口部が形成される、侵襲型治療法にしか使用することができず、又は、内視鏡の通路内部からピンセットを展開させかつ操作するのに十分な大きさの内視鏡と共に、非侵襲型治療法にて使用することができる。 Therefore, bipolar electrode of a conventional type, the tissue to be removed, or to tweezers enters the site of the tumor surgical opening of sufficient size is formed, to be used only to interventional therapy can not, or can with an endoscope that is large enough to be allowed and operated expansion tweezers from the passage inside of the endoscope, for use in non-invasive treatments.

この状況のため、比較的小さい自然の体腔を通じて直接に、又は、カテーテルを身体のその他の期間の内腔を通すことにより、非侵襲的に身体内に導入することのできる、新生物を乾燥させ、又は、切除する、流線型でよりコンパクトな形態の双極型電極の必要性が認識されている。 For this situation, directly through the relatively small nature of the body cavity, or by passing the lumen of the other periods of the body of the catheter, it can be introduced into non-invasively in body, dried neoplastic or excised, the need for bipolar electrode of a more compact form streamlined are recognized.

本発明の双極型電極は、この必要性に応えるために開発されたものである。 Bipolar electrode of the present invention has been developed to meet this need.

発明の概要 本発明の双極型電極は、流線型でコンパクトな形状をしており、このため、比較的小さい自然の体腔を通じて、又は動脈のような身体の他の器官の内腔を通じてカテーテルと共に、非侵襲的に身体内に導入することが可能となる。 Bipolar electrode SUMMARY OF THE INVENTION The present invention streamlined has a compact shape, and therefore, through the relatively small nature of the body lumen, or catheter together through the lumen of the other organs of the body, such as an artery, non invasively it is possible to be introduced into the body.

本発明の第一の好適な全体的な実施の形態において、 In a first aspect of a preferred overall implementation of the present invention,
双極型電極は、二つの構成要素から成るその電極が互いに関して内部で入り子に伸縮可能である。 Bipolar electrode is the electrode consisting of two components is extendable to terminal enters inside with respect to each other. この実施の形態は、外側電極を備えており、この外側電極は、その上に絶縁シースが付与された外側面を有する、端部が開放した円筒体であることが好ましく、そのシースが電極の外側面の全体まで覆い、外側電極は、内側スペースを有し、この内側スペース内には、第二の電極、即ち内側電極が摺動可能に取り付けられ、この内側電極は、外側電極の内径よりも小さい外径を有するロッド状の形状であることが好ましく、また、該外側電極は、側面を有する円筒状シャフトと、該シャフトの末端に取り付けられた先端部とを有し、その外側面の全体まで覆う絶縁シースがその上に設けられ、内側電極、及び該電極上の絶縁シースの合計直径が、依然として、外側電極の内径よりも小さいようにしたものである。 This embodiment comprises an outer electrode, the outer electrode has an outer surface which insulating sheath has been applied thereon, it is preferable that the end portion is a cylindrical body which is open, the sheath of the electrode cover until the entire outer surface, the outer electrode has an inner space, in the inner space, the second electrode, i.e., the inner electrode slidably mounted, the inner electrode, than the inner diameter of the outer electrode preferably also in the form of a rod shape having a small outer diameter, also the outer electrode has a cylindrical shaft having a side surface and a tip portion attached to the end of the shaft, the outer surface It covers until all of the insulating sheath provided thereon, the inner electrode, and the total diameter of the electrical superb insulation sheath still is obtained as smaller than the inner diameter of the outer electrode.

該装置の第二の好適な実施の形態において、双極型電極は、その二つの構成要素から成る電極が互いに関して内部で入り子に伸縮し、又は摺動可能であるように配置される形態とされる。 In a second preferred embodiment of the device, bipolar electrode has a form in which the electrode consisting of the two components are arranged so as to stretch the child enters inside with respect to each other, or can slide It is. この実施の形態において、また、 In this embodiment, also,
電極の全外側面まで覆う絶縁シースをその上に有する第二の電極は、第一の電極に対して平行に摺動可能であるよあうにその第一の電極の外部に配置されており、この第一の電極にも、該電極の全外側面まで覆う、絶縁シースを設けることが出来る。 Second electrode having an insulating sheath for covering up the entire outer surface of the electrode thereon is disposed outside of the first electrode to meet by parallel slidably with respect to the first electrode, in this first electrode, it covers until all exterior surfaces of the electrodes, it is possible to provide an insulating sheath.

本発明の双極型電極の第一及び第二の好適な全体的な実施の形態は、二つの主要な構成要素から成るその電極の詳細に関して、更に具体的な代替的な実施の形態とすることが可能である。 The first and second embodiments of the preferred overall implementation of the bipolar electrode of the present invention, for details of the electrodes consisting of two main components, be more specific alternative embodiment it is possible.

図面の簡単な説明 図1は、内側電極が引き込んだ置にある、本発明による双極型電極の末端の第一の好適な全体的な実施の形態の図、 図2は、内側電極が伸長位置にある、図1の双極型電極の図、 図3は、ステアリング可能な可撓性の内側電極が伸長位置にある、本発明による双極型電極の好適な第一の全体的な実施の形態の代替例における末端の図、 図4は、外側電極及び内側電極の双方が調節可能な絶縁シースを有する、本発明による好適な第一の全体的な実施の形態の更に別の代替例を示す図、 図5は、本発明による双極型電極の好適な第二の全体的な実施の形態における末端の図、 図6は、腫瘍の塊を乾燥させる本発明の双極型電極の作用方法を示す図である。 BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is the location where retracted inner electrode, the first embodiment of FIG preferred overall implementation of the end of the bipolar electrode according to the present invention, FIG. 2, the extended position the inner electrode in some, figure bipolar electrode of FIG. 1, FIG. 3, the inner electrode of the steerable flexible is in the extended position, the preferred first overall embodiment of the bipolar electrode according to the present invention Figure end in an alternative embodiment, FIG. 4, both the outer electrode and the inner electrode has an adjustable insulating sheath, showing yet another alternative example of a suitable first overall embodiment according to the present invention FIG. , 5, the second preferred overall termini of Figure in the embodiment of the bipolar electrode according to the present invention, FIG. 6 shows the effect method of the bipolar electrode of the present invention for drying the tumor mass of Fig. it is.

発明の詳細な説明 本発明による好適な第一の全体的な実施の形態における全ての実施例は、第一の電極である、外側電極と、第二の電極である、内側電極とを備えている。 All examples in the overall embodiment the first preferred due DETAILED DESCRIPTION OF THE INVENTION The present invention is a first electrode, and the outer electrode, a second electrode, and an inner electrode there. 該外側電極は、内径と、外径と、厚さと、管状の側面領域と、内面とを有する、端部が開放した略リング状の円筒体である。 Outer electrode, an inner diameter, an outer diameter, a thickness and a side surface region of the tubular, and an inner surface, a substantially ring-shaped cylindrical body end is open. 一つの好適な実施の形態において、外側電極は、端部が開放した円筒体である。 In one preferred embodiment, the outer electrode is a cylindrical body end is open. 外側電極、及び内側電極の一方、又は、外側電極及び内側電極の双方が、電極の全側面まで覆う絶縁材料のシースにより別個に囲繞されている。 One of the outer electrode, and the inner electrode, or both of the outer electrode and the inner electrode are separately surrounded by a sheath of insulating material covering up all aspects of the electrode. もう一つの好適な実施の形態において、各電極は、電極の全側面まで覆う絶縁材料のシースにより別個に囲繞されている。 In another preferred embodiment, each electrode is separately enclosed by a sheath of insulating material covering up all aspects of the electrode. 本発明による双極型電極の別の実施の形態において、第二の電極が第一の電極の内部にある形態ではなくて、第一の電極及び第二の電極が互いに隣接する位置にある形態とされる。 In another embodiment of the bipolar electrode according to the present invention, the second electrode rather than the form in the interior of the first electrode, and forms in the position where the first electrode and the second electrode adjacent to each other It is. かかる形態において、 In such form,
第一の電極及び第二の電極が互いに関して相対的に摺動可能であるようにその二つの電極を互いに結合する手段が設けられる。 Means the first electrode and the second electrode is coupled to each other the two electrodes so as to be relatively slidable with respect to each other is provided.

全体として、最適な実施の形態において、以下に説明するように、外側の円筒状リング電極は、円筒状リングであり、一定寸法の長さ、厚さ、内径及び外径を有している。 Overall, in the most preferred, as described below, the outer cylindrical ring electrode, a cylindrical ring, the length of the constant dimension, thickness, has an inner diameter and an outer diameter. この円筒状リング電極は、管状の側面と、内面とを有する、端部が開放した円筒体を形成する。 The cylindrical ring electrodes form the side surface of the tubular, and an inner surface, a cylindrical body end is open. 外側の円筒状リング電極は、従来の金属の電極材料で製造される。 Outer cylindrical ring electrode is fabricated by an electrode material of a conventional metal.

外側の円筒状リング電極は、絶縁材料のシースにより囲繞されている。 Outer cylindrical ring electrode is surrounded by a sheath of insulating material. 一つの実施の形態において、この絶縁材料は、円筒体を形成し、この円筒体の内径は、電極の外径に等しく、また、一端にて密封されている。 In one embodiment, the insulating material forms a cylinder, the inner diameter of the cylindrical body is equal to the outer diameter of the electrode, also is sealed at one end. シースは、電極の金属製の管状側壁に固定され、その末端の縁部からその基端の縁部まで、円筒体の全長に亙って伸長し、円筒体の基端の面を完全に覆い、円形のリングの形状にて、露出した金属製の電極面のみが残るようにし、 The sheath is fixed in a metal tubular side wall of the electrode, from the edge of its ends to the edge of its proximal end, extending over the entire length of the cylinder, completely covers the surface of the base end of the cylindrical body at the shape of a circular ring, so that only the electrode surface made of exposed metal remains,
このリングの末端面における幅が円筒状リング電極を製造する金属の厚さに等しいようにする。 Width at the end face of the ring to be equal to the thickness of the metal to produce a cylindrical ring electrode.

一つの代替的な実施の形態において、絶縁体シースは、円筒状の外側電極の管状の金属製側面に恒久的に取り付けられるのでなくて、摺動可能に取り付けられ、このため、該シースは、電極の側面の一部が露出されたままであるようにすべく調節可能な距離だけ円筒体の基端から後方に摺動可能である。 In the form of one alternative embodiment, the insulator sheath, rather than being permanently attached to the metal side of the tubular cylindrical outer electrode, slidably mounted, Therefore, the sheath is from the proximal end of the adjustable distance cylindrical body to be such a portion of the side surface of the electrode is left exposed and can slide backwards.

最も好適な実施の形態において、双極型電極の内側電極は、ロッド状の形状としており、該内側電極は、外側の円筒状リング電極のスペース内に摺動可能に取り付けられ、このため、内側電極は外側電極に対して「入り子式に伸縮する」。 In a most preferred embodiment, the inner electrode of the bipolar electrode is a rod-like shape, the inner electrode is slidably mounted within the space of the outer cylindrical ring electrode, Therefore, the inner electrode "enters expands and contracts in the child formula" with respect to the outer electrode. 内側ロッド電極は、円筒状又は流線形の丸形先端部にて選択的に終端となる中実の円筒状シャフト部分を有する。 Inner rod electrode has a cylindrical shaft portion of the real in that the selectively terminated at cylindrical or aerodynamic Marugata tip. 内側ロッド電極は、一定寸法の長さ及び直径を有する。 Inner rod electrode has a length and diameter of the constant dimension. 以下に説明するように、該ロッドの直径及びロッドを囲繞する絶縁シースの直径合計置が円筒状のリング電極の内径よりも大きくてはならないという制約から、ロッドの直径寸法が決まる。 As described below, the restriction that the diameter sum location of the insulating sheath surrounding the diameter and the rod of the rod must not be larger than the inner diameter of the cylindrical ring electrode, diameter of the rod is determined. このため、内側ロッド電極、及びその絶縁シースは、円筒状の外側ロッド電極のスペース内を摺動自在とすることができる。 Therefore, the inner rod electrode, and the insulating sheath, the space of the cylindrical outer rod electrodes can be slidable.
また、内側のロッド電極も従来の電極の金属材料で製造される。 Also, the inner rod electrode is made of a metal material of a conventional electrode.

内側ロッド電極は、絶縁材料から成るシースで囲繞されている。 Inner rod electrode is surrounded by a sheath of insulating material. 一つの実施の形態において、ロッド電極は、 In one embodiment, the rod electrode,
円筒状の形状の先端部を有し、この絶縁シースは、金属の正面が露出したままである先端部の前面を除いて、ロッド電極を完全に包み込む。 Has a distal end portion of the cylindrical shape, the insulating sheath, with the exception of the front surface of the distal portion remains metallic front is exposed, completely encloses the rod electrode. この実施の形態において、 In this embodiment,
絶縁シースは、内側ロッド電極のシャフトの金属製側壁に固定されている。 Insulative sheath is fixed to the metallic side wall of the shaft of the inner rod electrode.

代替的な実施の形態において、絶縁シースは、内側ロッドのシャフト部分の金属製側面に恒久的に固定されず、絶縁シースは、内側ロッドの基端から、調節可能な距離だけ後方に摺動し、内側ロッド電極のシャフトの金属製側面の一部分が露出されたままであるように摺動可能に取り付けられる。 In an alternative embodiment, the insulating sheath is not permanently fixed to the metal sides of the shaft portion of the inner rod, the insulating sheath is slid from the proximal end of the inner rod, backward by an adjustable distance slidably mounted such that a portion of the metal sides of the shaft of the inner rod electrode is left exposed.

図1は、本発明による双極型電極1の一つの好適な実施の形態の末端の斜視図である。 Figure 1 is a perspective end view of one preferred embodiment of the bipolar electrode 1 according to the present invention. この双極型電極1は、 The bipolar electrode 1,
厚さt 2の第一の絶縁シース3により囲繞された、厚さt 1 It is surrounded by a first insulating sheath 3 having a thickness of t 2, the thickness t 1
の円筒状の外側リング電極2を備えている。 It includes an outer ring electrode 2 cylindrical. 全体的な双極型電極は、外側絶縁シースの厚さを含む、外径D 1を有する。 Overall bipolar electrode comprises a thickness of the outer insulating sheath has an outer diameter D 1. 円筒状のリング電極自体は、外側D 2と、内径D 3とを有し、この場合、金属製電極t 1の厚さは、D 2 −D 3の差のに等しい。 Cylindrical ring electrode itself includes an outer D 2, and a inner diameter D 3, in this case, the thickness of the metal electrode t 1 is equal to the difference D 2 -D 3. 円筒状の外側リング電極2により形成された内側スペースは、リング電極の内径D 3に等しい径を有する。 Cylindrical inner space formed by the outer ring electrode 2 has a diameter equal to the inside diameter D 3 of the ring electrode.

内側ロッド電極4は、外側の円筒状リング電極のスペース内に摺動可能に配置されている。 Inner rod electrode 4 is slidably disposed within the space of the outer cylindrical ring electrode. この内側ロッド電極は、その前端が閉鎖した金属製の管状ロッド、又は中実な金属製ロッドの何れかとして選択的に製造される。 The inner rod electrode is selectively produced as either its front end closed metal tubular rods, or solid metallic rod.
内側ロッド電極は、スペースの直径よりも小さい外径D 4 The inner rod electrode, smaller outer diameter D 4 than the diameter of the space
を有している。 have. この内側ロッド電極は、第二の絶縁シース5により囲繞されており、この第二の絶縁シース5 The inner rod electrode is surrounded by a second insulating sheath 5, the second insulating sheath 5
は、内側ロッド電極に取り付けられ、また、該シースは、ロッドの金属製外面を円筒状のリング電極の金属製内面から分離される。 Is attached to the inner rod electrode, also, the sheath is separated metallic outer surface of the rod from the metal inner surface of the cylindrical ring electrode. ロッド電極に取り付けられた内側絶縁シースの厚さt 4は、距離D 3 −D 4の1/2に等しい。 The thickness t 4 of the inner insulating sheath attached to the rod electrodes is equal to half the distance D 3 -D 4. 内側ロッドD 4の直径、その絶縁シースの厚さt 4の合計値は、円筒状のリング電極のスペースの直径D 3を超えず、 The diameter of the inner rod D 4, the total value of the thickness t 4 of the insulating sheath does not exceed the diameter D 3 of the space of the cylindrical ring electrode,
また、好ましくは、その直径D 3よりも僅かに小さく、ロッド電極及びその絶縁シースがそのスペース内で前後に摺動自在であるようにするものであることが好ましい。 Also, preferably, the diameter D slightly smaller than 3, it is preferable rod electrode and its insulation sheath and is to be slidable back and forth within that space.

代替的な実施の形態において、内側ロッド電極、及びその絶縁シースは、円筒状の先端部ではなくて、丸形の湾曲した先端部となるように製造され、特に、ロッド電極が円筒状のリング電極の前縁部を超えて伸長するとき、その内に電極が配置される体腔、又は血管の内腔が先端部で破られる可能性が最小であるようにされる。 In an alternative embodiment, the inner rod electrode, and the insulating sheath, rather than the cylindrical tip, is produced to an curved tip portion of the round, in particular, the rod electrode is cylindrical rings when extending beyond the front edge of the electrode, the body cavity electrodes are placed on them, or possibly the lumen of a blood vessel is broken by the tip is to be the minimum.

図1には、引込みモードの形態とされた双極電極が示してあり、ここで、内側ロッド電極及びその絶縁シースは、円筒状リング電極のスペース内に引込まれ、このため、ロッド電極の先端部が円筒状リング電極の末端の前縁部を貫通する面を超えて伸長することはない。 FIG. 1 is shown the bipolar electrodes in the form of pull-mode, wherein the inner rod electrode and its insulating sheath, is drawn in the space of the cylindrical ring electrode, Therefore, the rod electrode tip There does not extend beyond the plane passing through the leading edge of the end of the cylindrical ring electrode. 双極型電極は、この形態にて、除去すべき新生物の部位に展開される。 Bipolar electrode, at this embodiment, is developed at the site of the neoplasm to be removed.

図2は、図1の双極型電極の側面図であり、この場合、内側ロッド電極、及びその絶縁シースは、伸長位置にて示してあり、電極の先端部、及びロッドのシャフトの一部分は、円筒状の外側リング電極の前縁部を超えてある距離、伸長している。 Figure 2 is a side view of a bipolar electrode of FIG. 1, in this case, the inner rod electrode, and the insulating sheath, is shown in the extended position, the distal end portion of the electrode, and a portion of the shaft of the rod, some distance beyond the front edge of the cylindrical outer ring electrode and extends. 新生物の乾燥、又は切除のために励起させるとき、双極型電極はこの形態にて配置される。 Drying of the neoplasm, or when exciting for ablation, the bipolar electrode is disposed in this embodiment.

図1及び図2に示した双極型電極の実施の形態において、第一及び第二の絶縁シースは、円筒状の外側リング電極、及び内側ロッド電極の外側にそれぞれ固定状態に取り付けられている。 In the embodiment of the bipolar electrode shown in FIGS. 1 and 2, the first and second insulating sheath, is attached to the fixed state on the outer side of the cylindrical outer ring electrode, and the inner rod electrode. この絶縁材料は、円筒状リング及びロッドの側面を略完全に覆う。 The insulating material is substantially completely cover the cylindrical ring and the side surface of the rod. 円筒状の外側リング電極の周りにある第一の絶縁シースは、円筒状リングの前縁まで伸長し、このため、円筒状の外側リング電極自体の厚さに等しい、厚さt 1 =(D 2 −D 3 )/2である円形の金属バンドのみが電極の軸方向に対して垂直である、電極の前面を貫通する面にて露出されたままになる。 First insulating sheath that surrounds the cylindrical outer ring electrode, extends to the front edge of the cylindrical ring, Therefore, equal to the thickness of the cylindrical outer ring electrode itself, the thickness t 1 = (D only 2 -D 3) / 2 circular metal band is is perpendicular to the axial direction of the electrode, remain exposed at the surface through the front of the electrode.

円筒状の先端部を有する内側ロッド電極の場合、この内側ロッド電極の周りの第二の絶縁シースも円筒状ロッドの前縁部まで伸長し、ロッド電極自体の直径D 3と同一径の金属の円形部分のみが電極の軸方向に対して垂直である、電極の前面を貫通する面内で露出されたままになる。 If the inner rod electrode having a cylindrical distal end portion, the second insulating sheath also cylindrical rod around the inner rod electrode front edge to extend, the same diameter as the diameter D 3 of the rod electrode itself metals it is perpendicular to the axial direction of only a circular portion electrode remains exposed in a plane passing through the front surface of the electrode.

放物線状に湾曲した先端部を有する内側ロッド電極の場合、一つの代替的な実施の形態において、絶縁シースは、先端部の略全体を覆い、先端部の先部分にて、金属の点部分のみが露出したままであるようにする。 If the inner rod electrode having a tip that is curved parabolically, in the form of one alternative embodiment, the insulating sheath covering substantially the entire front end portion, in the previous part of the tip portion, only in portions of the metal but to ensure that it remains exposed. もう一つの代替的な実施の形態において、放物線状に湾曲した先端部の全体は、絶縁体が除去された状態のままであり、電極先端部の金属面が露出したままであるようにする。 In the form of another alternative embodiment, the entire distal end portion curved parabolically remains in the state in which the insulator is removed, the metal surface of the electrode tip so that remain exposed. この実施の形態において、ロッド電極の円筒状のシャフト部分しか絶縁されない。 In this embodiment, only insulated cylindrical shaft portion of the rod electrodes.

本発明による双極型電極の更に別の代替的な実施の形態において、第一及び又は第二の絶縁シースが、円筒状の外側リング電極、及び内側ロッド電極のそれぞれの外面に、固定状態ではなくて、調節可能に取り付けられている。 In yet another alternative embodiment of the bipolar electrode according to the present invention, the first and or second insulating sheath, cylindrical outer ring electrode, and each of the outer surface of the inner rod electrode is not in a fixed state Te is mounted adjustably. これらの実施の形態において、絶縁シースは、電極の長さに沿って調節可能な距離、電極の基端から引込んで、その末端における電極の金属製側面の一部分が露出されるようにすることができる。 In these embodiments, the insulating sheath, an adjustable distance along the length of the electrode, retracted from the proximal end of the electrode, that part of the metallic side of the electrode at its end to be exposed it can.

乾燥、又は切除のために、電極の更なる側部表面積を露出させるべく、絶縁シースを引込ませる距離は、除去すべき新生物の寸法、及び形状、並びに電極の励起モードを考慮して決定される。 Drying, or for ablation, to expose additional side surface area of ​​the electrodes, the distance to retract the insulating sheath, neoplasms of dimensions to be removed, and shape, and are determined in consideration of the excitation mode of the electrode that. 高周波数エネルギを有効にするためには、電極の表面と新生物との良好な接触状態を保つことが重要である。 To enable high-frequency energy, it is important to maintain good contact between the surface and neoplasm of the electrode. 更に、切除モードではなくて、 Furthermore, rather than ablation mode,
乾燥モードにて操作するとき、より大きい表面接触が必要となる。 When operating in a drying mode, it is necessary to greater surface contact.

図3には、本発明による双極型電極のもう一つの好適な実施の形態が図示されており、この場合、それぞれ、 In FIG. 3, another preferred embodiment of the bipolar electrode are illustrated according to the present invention, in this case, respectively,
円筒状の外側リング電極、及び内側ロッド電極の外面に設けられた第一及び第二の絶縁シースの双方は、調節可能に取り付けられる。 Cylindrical outer ring electrode, and both the first and second insulating sheath provided on the outer surface of the inner rod electrode is adjustably mounted. 双極型電極1は、伸長した作用可能な形態で示してあり、内側ロッド電極4は、円筒状の外側リング電極2の露出した金属製の前面を超えて、合計距離L′、伸長している。 Bipolar electrode 1, is shown in extended operable forms, the inner rod electrode 4, beyond the exposed front surface made of a metal cylindrical outer ring electrode 2, and the total distance L ', extension . 更に、切除操作モードに関しては、その双方の電極は、更なる電極の側部表面積を露出させるべくその絶縁シースを引込めた状態で示されている。 Furthermore, with regard to the ablation operation mode, both of the electrodes are shown with the order has retracted its insulating sheath to expose the side surface area of ​​the further electrode. このように、円筒状の外側リング電極2を囲繞する第一の絶縁シース3は、電極の側部表面積2aを露出させるため電極の前面から距離L 1だけ引込ませる。 Thus, the first insulating sheath 3 surrounding the cylindrical outer ring electrode 2 to retract from the front of the electrode to expose a side surface 2a of the electrode by a distance L 1. 同様に、内側ロッド電極4を囲繞する第二の絶縁シース5 Similarly, the second insulating sheath 5 surrounding the inner rod electrode 4
は、電極の側部表面積4aを露出させるため、電極の前面から距離L 3だけ引込ませる。 It is to expose the sides surface 4a of the electrode, to retract from the front of the electrode by a distance L 3. 絶縁シースは、円筒状のリング電極の前面を超えて調節可能な距離L 2だけ、前進する。 Insulating sheath, only adjustable distance L 2 beyond the front of the cylindrical ring electrode is advanced. 絶縁シースの前進距離L 2に、絶縁シースの前部が内側ロッド電極の面から引込む距離L 3を加えると、内側ロッド電極の先端部と円筒状リング電極の表面との間の合計軸方向距離L′が得られる。 The advance distance L 2 of the insulating sheath, the total axial distance between the front portion of the insulating sheath adds the distance L 3 draw from the face of the inner rod electrode, the tip and the cylindrical ring surface of the electrodes of the inner rod electrode L 'can be obtained.

ある状況において、除去すべき新生物は、不規則な形状をしており、このため、電極の追加的な側部表面積を露出させるため、絶縁シースが内側ロッド電極から引込んだときでも、電極と組織とを十分に接触させることができない。 In some circumstances, the neoplasm to be removed, has an irregular shape and thus, to expose additional side surface area of ​​the electrode, even when the insulating sheath is retracted from the inner rod electrode, the electrode It can not be sufficiently contacted with the tissue with. かかる状況のとき、可撓性の内側ロッド電極及び絶縁シースは、次のように配置することが望ましい。 When such a situation, the flexible inner rod electrode and the insulating sheath, it is desirable to arrange as follows. 即ち、円筒状のリング電極の前面を超えて直線状に伸長したならば、ロッド電極は曲がり、その結果、内側ロッド電極の表面積が新生物の不規則な形状により正確に近似したものとなる位置となる。 That is, if elongated linearly beyond the front of the cylindrical ring electrode rod electrodes bends made as a result, and that the surface area of ​​the inner rod electrode is accurately approximated by an irregular shape of neoplasms position to become. 可撓性の内側ロッド電極は、円筒状のリング電極の面の前縁部を超えて伸長し、また、曲がって、ロッド電極が円弧状の形状となり、第一の絶縁シースの外周伸長部の外側を伸長して、 Inner rod electrodes of flexible, and extends beyond the front edge portion of the surface of the cylindrical ring electrode, also bent, the rod electrode is an arcuate shape, the outer peripheral extension of the first insulating sheath It extends the outside,
円筒状のリング電極の中央を貫通する中心軸線に対してある角度を形成することができる。 It is possible to form an angle to the central axis through the center of the cylindrical ring electrode. この実施の形態の可撓性の内側ロッド電極は、制御ワイヤーによって双極型電極の基端から操作可能である。 Inner rod electrodes of flexibility of the embodiment is operable from the proximal end of the bipolar electrode by a control wire.

図4には、可撓性のステアリング可能な内側ロッド電極4を有する型式の双極型電極1が示されている。 4 shows a bipolar electrode 1 of the type having a flexible steerable inner rod electrode 4 is shown. 内側ロッド電極4は、その絶縁シース5と共に、円筒状のリング電極2の面の前縁部、及びその絶縁シース3を超えて円弧状に伸長した位置にある。 Inner rod electrode 4 is with its insulating sheath 5, the front edge portion of the surface of the cylindrical ring electrode 2, and a position extended in an arc shape beyond its insulating sheath 3. 内側ロッド電極は、円筒状リング電極の前縁部を超えて円弧長さL 1だけ調節可能に伸長する。 Inner rod electrode is simply adjustably extended arc length L 1 beyond the front edge of the cylindrical ring electrode. 内側ロッド電極の先端部を貫通する中心線は、円筒状の外側リング電極を通る中心線と、ロッド電極に付与される曲率の関数である、可変の立体角θにて交差する。 Center line passing through the tip of the inner rod electrodes intersects the center line passing through the cylindrical outer ring electrode, which is a function of the curvature to be imparted to the rod electrodes, at variable solid angle theta.

また、可撓性で且つステアリング可能な内側ロッド電極を内蔵する、本発明による双極型電極の実施の形態は、次のように製造することができる。 Moreover, flexible and with a built-in steerable inner rod electrodes, an embodiment of the bipolar electrode according to the present invention can be prepared as follows. 即ち、内側ロッド電極上における絶縁シース及び/又は、円筒状の外側リング電極上における絶縁シースが一方又は双方の電極の更なる金属製電極の側部面積を露出させ得るように摺動し得るように調節可能であるようにする。 That is, the insulating sheath and / or on the inner rod electrode, as can slide as the insulating sheath in a cylindrical outer ring on electrodes may expose the side area of ​​a further metal electrode of one or both of the electrodes so that it is adjustable. 少なくとも内側ロッド電極、又は、内側ロッド及び円筒状の外側リング電極の双方における絶縁シースを調節し得ると共に、内側ロッド電極を円弧状の形態に配置し得るという特徴のため、本発明の双極型電極を利用して、寸法及び形状の著しく異なる新生物を除去するときの自由度を高めることが可能である。 At least the inner rod electrodes, or, together capable of regulating the insulating sheath in both the inner rod and the cylindrical outer ring electrode, for feature of being able to place the inner rod electrode in an arc-like form, bipolar electrode of the present invention utilizing, it is possible to enhance the degree of freedom when removing significantly different neoplasms size and shape.

円筒状の外側リング電極、及び内側ロッド電極の双方は、新生物を乾燥させ、又は除去するため、各電極にRF Both cylindrical outer ring electrode, and the inner rod electrode is dried neoplasm, or to remove, RF to electrodes
エネルギを供給する高周波数(RF)発生器に接続されいてる。 And it has been connected to a high frequency (RF) generator for supplying energy.

本発明による双極型電極の第二の好適な実質的な実施の形態において、二つの主要な構成要素から成る電極は、互いに関する外部形状とされ、また、互いに関して入り子式に伸縮して摺動可能である。 In a second form of preferred practical embodiment of the bipolar electrode according to the present invention, the electrode consisting of two main components are the outer shape with respect to each other, also expands and contracts the telescopic enters with respect to one another sliding is a dynamic possible.

図5には、本発明による双極型電極1の第二の好適な全体的な実施の形態の末端部が示されており、この場合、第二の電極4、及び第二の絶縁シース5は、第一の電極2及び第一の絶縁シース3に対して平行に外部に配置され、また、該電極及びシースに関して入り子式に伸縮し且つ摺動可能である。 5 shows, the present invention is the distal end of the second preferred overall embodiment of the bipolar electrode 1 is shown by, in this case, the second electrode 4, and a second insulating sheath 5 They are arranged in parallel to the outside with respect to the first electrode 2 and the first insulating sheath 3, also be and slidable stretch the telescopic enters regard the electrode and the sheath. この実施の形態によれば、第二の電極を内部に受け入れ得るように、第二の電極よりも大径の円筒管として第一の電極を製造する必要がないから、第一及び第二の電極は、略同一の外径にて製造することができる。 According to this embodiment, the second electrode adapted to receive therein, since it is not necessary to manufacture the first electrode as a cylindrical tube having a diameter larger than the second electrode, the first and second electrodes can be produced in substantially the same outer diameter. この実施の形態によれば、その双方の電極は、中実なロッドとして製造することができる。 According to this embodiment, the both electrodes can be manufactured as a solid rod. 双方の電極には、その電極に関して固定し、又は摺動させることのできる絶縁シースを設けることができる。 The both electrodes, it is possible to provide an insulating sheath that can be fixed with respect to the electrode, or sliding. この実施の形態において、二つの電極は、第二の電極及びその絶縁シースが第一の電極、及びその絶縁シースに関して相対的に動くのを許容する手段(図示せず)により、 In this embodiment, two electrodes by means of the second electrode and the insulating sheath to permit the first electrode, and the relative movement with respect to its insulating sheath (not shown),
互いに関して摺動可能に結合されている。 It is slidably coupled with respect to each other. 第二の電極が第一の電極内に配置される実施の形態におけるよりも小さい外径の第一の電極として製造することができるため、二つの電極が互いに平行に外部に配置されたこの実施の形態は、第二の電極が第一の電極の内部に配置された実施の形態と同等の全外径(D 5 )を有するように製造することができる。 This implementation has the second electrode because it can be produced as a first electrode of smaller outer diameter than in the embodiment is disposed within the first electrode, located outside the parallel two electrodes to each other mode can be the second electrode is made to have a first interior disposed a embodiment of equivalency of the electrode overall outer diameter (D 5).

本発明の双極型電極は、その流線型で且つコンパクトな形態のため、組織又は腫瘍のような新生物を身体の比較的アクセス困難な部分から除去するための治療法に理想的に適したものである。 Bipolar electrode of the present invention, which its and for compact form streamlined, ideally suited for treatment for removal of neoplasms such as tissue or tumor relatively difficult to access parts of the body is there. 本発明の双極型電極は、そのコンパクトな寸法のため、以下の点で従来の双極型電極に優る利点がある。 Bipolar electrode of the present invention, because of its compact size, has the advantage over conventional bipolar electrode in the following points. 即ち、電極を比較的小さい自然の体腔に挿入し、又は、その前方に本発明の電極が取り付けられたカテーテルと共に、動脈のような身体の血管の内腔を通じてカテーテル、及び双極型電極を除去すべき塊の部位に通して利用することで、除去すべき塊の部位までRFエネルギ供給電極を移動させて、非侵襲式に容易に使用し得るという利点がある。 That is, to insert the electrodes into relatively small natural body cavities, or, together with the catheter electrode of the present invention is attached to the front, to remove the catheter, and a bipolar electrode through the lumen of a body vessel such as an artery by using through site to mass moves the RF energy supply electrode to the site of the mass to be removed, there is an advantage that it can easily be used for non-invasively. 本明細書で使用するように、非侵襲式という語は、大きい外科用開口部を必要としないことを意味し、また、双極型電極が挿入される小さい突刺型の身体の切開部が必要とされる方法を含むものである。 As used herein, the term non-invasive means that does not require a large surgical opening, also requires incision small puncture-type body is bipolar electrode is inserted it is intended to include methods.

本発明による双極型電極を利用して、人体の器官の内腔に双極型電極を挿入することにより、新生物を非侵襲的に除去することができ、電極は、完全に引っ込んだ状態にある、即ち、内側ロッド電極及びその絶縁シースが図5に図示するように、円筒状の外側リング電極及びその絶縁シースのスペース内に完全に引込み、また、該双極型電極を内腔を通じて新生物付近まで進める状態にある。 Using the bipolar electrode according to the present invention, by inserting a bipolar electrode in the lumen of the human body organs, neoplasms can be a non-invasive removal, the electrode is in the fully retracted state , i.e., such that the inner rod electrode and its insulating sheath illustrated in Figure 5, completely retracted in the cylindrical outer ring electrodes and the space within the insulating sheath, also neoplastic vicinity through the lumen the bipolar electrode It is in a state to proceed to. 次に、内側ロッド電極を前方に摺動させ、その先端部が円筒状の外側リング電極の末端の前縁部を超えて伸長するようにする。 Then, sliding the inner rod electrode forward, the tip so as to extend beyond the front edge of the end of the cylindrical outer ring electrode. 双極型電極の要素と新生物との接触の程度は、双極型電極を使用するときの新生物の除去モードにより決まる。 The degree of contact between the bipolar electrode element and the neoplasm is determined by neoplastic removal mode when using the bipolar electrode. このように、双極型電極を使用して小さい新生物の塊を簡単に切り取る特定の状況において、通常、内側ロッド電極の先端部とその塊とが最小程度に接触するだけで十分である。 Thus, in certain circumstances cutting simplicity of small neoplastic masses using bipolar electrodes, usually, it is sufficient that the tip portion of the inner rod electrode and its mass is in contact with the minimum degree. その塊が大きい場合、 If the lump is large,
より大きい接触が必要となり、また、その塊が深い場合、内側ロッド電極を槍状に利用して、新生物を突刺すこともできる。 Larger contact is required, and if the mass is deep, by using the inner rod electrode lance, it is also possible to pierce the neoplasm. この場合、電極表面とその塊との接触程度を大きくするため、ロッド及びリング電極を覆う絶縁シースが摺動可能に調節可能な形態である、双極型電極の実施の形態を使用することが好ましく、内側ロッド電極の上方に亙たる少なくとも絶縁シースを引っ込ませて、先端部に加えて、ロッドのシャフト部分の全側面の一部が露出されるようにする。 In this case, in order to increase the degree contact between the electrode surface and the mass, which is an insulating sheath slidably adjustable form for covering the rod and ring electrodes, it is preferable to use an embodiment of a bipolar electrode and retract at least the insulating sheath upcoming Wataru over the inner rod electrode, in addition to the tip portion of all sides of the shaft portion of the rod is exposed. その内側ロッド電極が新生物の塊を突刺すとき、内側ロッド電極のシャフトの側面の露出部分がその塊に接触する。 When the inner rod electrode piercing the mass of neoplasms, side exposed portion of the shaft of the inner rod electrode is in contact with the mass. この方法において、 In this method,
ロッド電極をその経路を通じて進めることにより、その塊が切り取られる。 By advancing the rod electrode through the path, the mass is cut off. このようにして操作する間に、新生物の塊の基端部分に当接するように円筒状の外側リング電極の露出した前面を移動させ、切取りに利用可能な電極と新生物との接触程度を更に増すことができる。 During the operation this way, the exposed front surface of the cylindrical outer ring electrode so as to abut the proximal portion of the neoplastic mass is moved, the degree of contact between the available cut electrode and neoplasms it can be further increased.

新生物の塊を完全に蒸発させる切除モードにおいて双極型電極が使用される状況のとき、電極要素及びその塊の利用可能な面積は少なくなる。 When situations bipolar electrode in the ablation mode to fully evaporate the neoplastic mass is used, the area available for the electrode elements and the mass is reduced. これは、必要に応じて、円筒状の内側電極及び外側電極から絶縁シースを調節することにより行われる。 This is optionally done by adjusting the insulating sheath from the cylindrical inner and outer electrodes.

除去すべき新生物が比較的厚い場合、その絶縁シースが引っ込んだ内側ロッド電極をその塊に挿入し、先端部の露出した電極面がその塊の末端に接触し、ロッド電極の露出したシャフト部分がその塊の全体に接触する一方、円筒状外側リング電極の端部における露出した電極面が新生物の塊の基端に接触するようにする。 If the neoplasm to be removed is relatively thick, and insert the inner rod electrode retracted its insulating sheath on its mass exposed electrode surface of the distal end portion is in contact with the end of the mass exposed shaft portion of the rod electrodes There while in contact with the whole of the mass, the electrode surface that is exposed at the end of the cylindrical outer ring electrode is brought into contact with the proximal end of the neoplastic mass.

全ての場合、電極の表面が新生物の塊と接触する位置に最適に配置された後、接触する電極の一つに高周波エネルギを付与し、エネルギが供給された電極から新生物の塊を通ってその他の電極まで流れて、これにより、利用されるエネルギ量に対応して、その後にその塊を切取り又は切除することが可能となる。 In all cases, after the surface of the electrode is optimally placed in contact with the neoplastic mass, the high-frequency energy is applied to the one contact electrode, through the neoplastic mass from electrodes energy is supplied Te flows to other electrodes, by which, in response to the amount of energy utilized, it is possible subsequently to cut or ablate the mass.

切取り又は切除過程が完了したとき、高周波エネルギの付与を停止し、内側ロッド電極及びその絶縁シースを再度、円筒状の外側リング電極のスペース内に引込ませる。 When cut or ablation process is complete, stop the application of high-frequency energy, the inner rod electrode and the insulating sheaths again retract into the space of the cylindrical outer ring electrode. この過程は、引っ込んだ双極型電極を血管の内腔を通じて引き出し且つその電極を身体から引き出すことにより完了する。 This process is completed by withdrawing the bipolar electrode recessed drawer and its electrodes through the lumen of a blood vessel from the body.

図6には、本発明による双極型電極を脳腫瘍の除去に使用する場合が示してある。 Figure 6 is Aru a bipolar electrode according to the present invention is shown a case of using the removal of a brain tumor. 引っ込んだ形態にて双極型電極1を頭蓋骨の小さい切開部を通じて挿入し、X線又はその他の従来の診断技術により識別し且つ検出した腫瘍12の部位まで進める。 Advances in retracted form the bipolar electrode 1 inserted through a small incision of the skull, to the site of the tumor 12 and detect and identify by X-ray or other conventional diagnostic techniques. 電極は、その塊の前縁部に近接する位置に配置され、また、内側ロッド電極4がその塊を突刺すように電極を入り子に伸縮動作させる。 Electrode is disposed at a position close to the front edge of the mass, also the inner rod electrode 4 extending and retracting the child enters the electrodes to pierce the mass. 次に、 next,
その先端部の前縁部がその塊の後縁部と接触するまで、 Until the leading edge of the tip contacts the trailing edge of the mass,
内側ロッド電極4をその塊を通じて進める。 Advancing the inner rod electrode 4 through the mass. その塊と接触する電極の表面積を最大にするため、内側ロッド電極をその塊を通じて進める。 To maximize the surface area of ​​the electrode in contact with the mass, it advances the inner rod electrode through the mass. 円筒状の外側リング電極2の前縁部をその塊の前縁部と当接する位置にする。 The front edge of the cylindrical outer ring electrode 2 to contact position and the front edge of the mass. 次に、 next,
発生器10から導線7を介して高周波エネルギを内側ロッド電極に供給する。 Supplying high-frequency energy to the inner rod electrode from the generator 10 via lead 7. 電流はその塊を通じて内側ロッド電極から流れ、その塊を乾燥させ、次に、外側リング電極に集められ、導線6を通って流れて戻り、回路を完成させる。 Current flows from the inner rod electrode through the mass, the mass is dried, then collected to the outer ring electrode, the return flow through the conductor 6, to complete the circuit.

本発明による双極型電極及びその使用方法の上記の実施の形態は、単に一例であり、限定的なものであることを意図するものではない。 The above embodiment of the bipolar electrode and method of use thereof according to the present invention is merely an example, not intended to be limiting. 本発明の双極型電極のその他の実施の形態、適用分野及びその使用方法は、本明細書の請求の範囲の記載の範囲内で、当業者に明らかであろう。 Other embodiments of the bipolar electrode of the present invention, the field of application and methods of use thereof are within the scope of the scope of the claims herein will be apparent to those skilled in the art. 請求の範囲に含まれる双極型電極のその他の実施の形態には、例えば、円筒状の外側電極以外の形状を有する外側電極及び内側電極、上記に詳細に説明した好適な実施の形態の内側ロッド電極が含まれる。 Other embodiments of bipolar electrodes contained in the claims, for example, cylindrical outer electrode and the inner electrode having a shape other than the outer electrode, the inner rod of the preferred embodiment described in detail above It includes electrodes.

Claims (11)

    (57)【特許請求の範囲】 (57) [the claims]
  1. 【請求項1】末端と、基端とを備え、長さ、厚さ及び外径寸法を有すると共に、外側面を更に備える第一の電極(2)と、 該第一の電極の全外側面にまで取り付けられた第一の層の絶縁体(3)と、 末端と、基端と、長さ及び外径寸法とを有し、外側面を更に備える第二の電極(4)と、 該第二の電極の全外側面まで取り付けられた第二の層の絶縁体(5)とを備える、双極型電極(1)にして、 前記第一の電極(2)及び前記第二の電極(4)が、次のものから選択された方法にて互いに関する形態とされる、即ち、(i)第二の電極(4)が第一の電極(2) [1 claim: a terminal, and a proximal end, a length, and has a thickness and outer diameter, the first electrode further comprising an outer surface (2), the total outer surface of said first electrode the insulator of the first layer (3) which is attached to a, the distal end, a proximal end, and a length and outer diameter, a second electrode, further comprising an outer surface (4), the comprising a second insulator of the second layer which is attached to the entire outer surface of the electrode and (5), and the bipolar electrode (1), said first electrode (2) and said second electrode ( 4) is the form with respect to each other by a method selected from:, i.e., (i) a second electrode (4) is the first electrode (2)
    内に摺動可能に配置され、第一の電極(2)が内径と、 Slidably arranged, the first electrode (2) is an inner diameter within,
    内側スペースとを有する端部が開放した管状の形状であり、第二の電極(4)及び第二の層の絶縁体(5)の合計外径が、第一の電極(2)の内径よりも大きくなく、 A tubular shaped end portion is open with an inner space, the total outer diameter of the insulator of the second electrode (4) and a second layer (5) is, than the inner diameter of the first electrode (2) no greater,
    (ii)第二の電極(4)が第一の電極(2)に対して平行に摺動可能であるように外部に配置され、 前記第一の電極(2)及び第二の電極(4)を互いに外部で摺動可能に結合する手段が更に設けられ、 前記第一の電極(2)及び第二の電極(4)の少なくとも一方に高周波エネルギを供給する高周波発生器(10) (Ii) a second electrode (4) is disposed outside to be parallel slidably with respect to the first electrode (2), said first electrode (2) and a second electrode (4 ) slidably means for coupling is further provided outside each other, said first electrode (2) and a second electrode (4) at least one high frequency generator for supplying radio frequency energy (10)
    を備えることを特徴とする双極型電極。 Bipolar electrode, characterized in that it comprises a.
  2. 【請求項2】請求の範囲第1項に記載の双極型電極(1)にして、前記第一の電極(2)及び第二の電極(4)の双方が、そのそれぞれの末端においてのみ露出されることを特徴とする双極型電極。 Wherein in the bipolar electrode according to claim 1, wherein (1), both, exposed only at their respective ends of said first electrode (2) and a second electrode (4) bipolar electrode, characterized in that the.
  3. 【請求項3】請求の範囲第1項に記載の双極型電極(1)にして、前記第二の電極(4)が前記第一の電極(2)内に摺動可能に配置されたとき、第二の層の絶縁体(5)が取り付けられた前記第二の電極(4)が、前記第一の電極(2)の末端を超える調節可能な距離だけ、前記第一の電極(2)内で摺動可能であることを特徴とする双極型電極。 3. in the bipolar electrode according to claim 1, wherein (1) when said second electrode (4) is slidably disposed on the first electrode (2) in , the insulator of the second layer (5) is mounted a second electrode (4) is only adjustable distances greater than the ends of said first electrode (2), said first electrode (2 bipolar electrode, characterized in that) in a slidable.
  4. 【請求項4】請求の範囲第3項に記載の双極型電極(1)にして、前記第二の電極(4)が、前記第一の電極(2)内の引っ込んだ位置にあるとき、前記第一の電極(2)及び第二の電極(4)を貫通して伸長する共通の中心軸線に関して立体角(θ)を形成する位置までステアリング可能であるように円弧状に可撓性であり、前記第二の電極(4)の末端が第一の電極(2)の外周部の伸長部の外方に伸長することを特徴とする双極型電極。 4. in the bipolar electrode according to claim 3 (1), wherein the second electrode (4) is, when in the retracted position of the first in one electrode (2), a flexible arcuately so as to be steerable to the position for forming a solid angle (theta) with respect to the common central axis extending through said first electrode (2) and a second electrode (4) There, the second electrode (4) bipolar electrode end, characterized in that extending outwardly of the elongated portion of the outer peripheral portion of the first electrode (2) of the.
  5. 【請求項5】請求の範囲第1項に記載の双極型電極(1)にして、前記第一の電極(2)の外側面に取り付けられた前記第一の層の絶縁体(3)が、前記第一の電極(2)の外側面表面積の一部分を露出させ得るように摺動可能に調節可能であることを特徴とする双極型電極。 5. the bipolar electrode (1) according to claim 1, the insulator of the first layer attached to the outer surface of said first electrode (2) (3) , bipolar electrode wherein the first electrode (2) is adjustable manner slidably to a portion of the outer surface area may expose the.
  6. 【請求項6】請求の範囲第1項に記載の双極型電極(1)にして、前記第二の電極(4)の外側面に取り付けられた前記第二の層の絶縁体(5)が、前記第二の電極(4)の外側面表面積の一部分を露出させ得るように摺動可能に調節可能であることを特徴とする双極型電極。 6. in the bipolar electrode according to claim 1, wherein (1), an insulator of the second layer which is attached to an outer surface of the second electrode (4) (5) the second electrode (4) bipolar electrode, characterized in that a portion of the outer surface area is slidably adjustable so as to expose the.
  7. 【請求項7】請求の範囲第1項に記載の双極型電極(1)にして、前記第一の電極(2)の外側面に取り付けられた前記第一の層の絶縁体(3)が、前記第一の電極(2)の側部表面積の一部分を露出させ得るように摺動可能に調節可能であり、前記第二の電極(4)の外側面に取り付けられた第二の層の絶縁体(5)が、第二の電極(4)の側部表面積の一部分を露出させ得るように摺動可能に調節可能であることを特徴とする双極型電極。 7. the bipolar electrode according to claim 1, wherein (1), an insulator of the first layer attached to the outer surface of said first electrode (2) (3) said first electrode (2) is capable adjustable slide so as to expose a portion of the side surface of the second layer which is attached to an outer surface of the second electrode (4) an insulator (5) is, the second electrode (4) bipolar electrode, characterized in that a portion of the side surface is slidably adjustable so as to expose the.
  8. 【請求項8】請求の範囲第1項に記載の双極型電極(1)にして、前記第二の電極(4)が前記第一の電極(2)に対して平行に摺動可能であるように外部に配置されるとき、第二の層の絶縁体(5)が取り付けられた前記第二の電極(4)が、前記第一の電極(2)の末端を超える調節可能な距離だけ、前記第一の電極(2)に関して摺動可能であることを特徴とする双極型電極。 8. the bipolar electrode according to claim 1, wherein (1) is parallel to slidable relative to the second electrode (4) said first electrode (2) when placed outside as the insulator of the second layer (5) is mounted a second electrode (4) is only adjustable distances greater than the ends of said first electrode (2) , bipolar electrode, characterized in that it is slidable with respect to said first electrode (2).
  9. 【請求項9】請求の範囲第1項に記載の双極型電極(1)にして、前記第一の電極(2)が円筒状の形状の管であることを更に特徴とする双極型電極。 9. the bipolar electrode according to claim 1, wherein (1), further bipolar electrode wherein the first electrode (2) is a tube of cylindrical shape.
  10. 【請求項10】請求の範囲第1項に記載の双極型電極(1)にして、前記第二の電極(4)がロッドであることを更に特徴とする双極型電極。 10. the bipolar electrode according to claim 1, wherein (1), further bipolar electrode wherein the second electrode (4) is rod.
  11. 【請求項11】請求の範囲第1項に記載の双極型電極(1)にして、前記第一の電極(2)及び第二の電極(4)が互いに平行に摺動可能であるように外部に配置されるとき、前記第一の電極(2)及び第二の電極(4)の双方がロッドであることを特徴とする双極型電極。 11. the bipolar electrode according to claim 1, wherein (1), such that said first electrode (2) and a second electrode (4) are parallel slidably with each other when placed externally, bipolar electrodes both of the first electrode (2) and a second electrode (4) is characterized in that it is a rod.
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WO1995020360A1 (en) 1995-08-03
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AU1076195A (en) 1995-08-15

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