JP2003210483A - High frequency tissue incision instrument - Google Patents

High frequency tissue incision instrument

Info

Publication number
JP2003210483A
JP2003210483A JP2002012063A JP2002012063A JP2003210483A JP 2003210483 A JP2003210483 A JP 2003210483A JP 2002012063 A JP2002012063 A JP 2002012063A JP 2002012063 A JP2002012063 A JP 2002012063A JP 2003210483 A JP2003210483 A JP 2003210483A
Authority
JP
Japan
Prior art keywords
tissue
jaw
bipolar
electrodes
jaws
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2002012063A
Other languages
Japanese (ja)
Inventor
Koichi Hosokawa
浩一 細川
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to JP2002012063A priority Critical patent/JP2003210483A/en
Publication of JP2003210483A publication Critical patent/JP2003210483A/en
Pending legal-status Critical Current

Links

Abstract

<P>PROBLEM TO BE SOLVED: To provide bipolar forceps with a sharp treatment region of incision, coagulation, or the like regardless of the thickness of clamped tissue. <P>SOLUTION: The bipolar forceps 1 is provided with a pair of jaws 10a, 10b for gripping the tissue by clamping it, and bipolar electrodes 20a, 20b contacting the clamped tissue are disposed at the grip face of one jaw 10b. <P>COPYRIGHT: (C)2003,JPO

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【発明の属する技術分野】本発明は高周波電流を利用し
て管腔を含む体腔内の組織部位を例えば内視鏡下で切開
するバイポーラ式高周波組織切開具に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bipolar high-frequency tissue incision instrument for incising a tissue site in a body cavity including a lumen by using a high-frequency current, for example, under an endoscope.

【0002】[0002]

【従来の技術とその課題】近年、体腔内の組織部位を内
視鏡観察下で行なう鏡視下手術はその適用範囲が拡大さ
れ、早期胃がん治療においても内視鏡的粘膜切除術は大
きなウェイトを占めるようになった。
2. Description of the Related Art In recent years, the scope of endoscopic surgery performed under endoscopic observation of a tissue site in a body cavity has been expanded, and endoscopic mucosal resection has a great weight in the treatment of early gastric cancer. Came to occupy.

【0003】早期胃がんの内視鏡的切除において、病変
部を一括切除するためには粘膜切開および粘膜下剥離の
2つの手技が必要である。いずれの手技においても従来
はモノポーラ式高周波処置具が使用されてきた。モノポ
ーラ式高周波処置具は体外表面に不関電極を配置する関
係で能動電極から電流が患者の体を通じて不関電極に流
れるため、能動電極から不関電極に至る高周波電流の領
域及び経路は厳密に限局することが困難であり、切除し
たい個所以外にも通電し、出血・穿孔等の合併症が生じ
る虞が指摘されていた。
In endoscopic resection of early gastric cancer, two procedures, namely, mucosal incision and submucosal detachment, are required to collectively excise lesions. Conventionally, a monopolar high-frequency treatment device has been used in any of the procedures. In the monopolar high-frequency treatment device, the current flows from the active electrode to the indifferent electrode through the patient's body because the indifferent electrode is placed on the external surface of the body. It was difficult to localize, and it was pointed out that complications such as bleeding and perforation might occur when electricity is applied to a place other than the place to be excised.

【0004】また、がんを含む切除標本は組織病理学的
検査に供されるが、切除辺縁の熱変性領域が広いと切除
断片の判定が困難となってしまうため、従来はモノポー
ラ式高周波処置具よりも鋭利に生体組織を切開できる切
開具が望まれていた。
[0004] A resected specimen containing cancer is subjected to histopathological examination, but it is difficult to determine the resected fragment if the heat-denatured region at the margin of the excision is wide. There has been a demand for an incision instrument capable of incising a living tissue sharper than a treatment instrument.

【0005】これまでも、通電領域を限局できるバイポ
ーラ式高周波処置具として、バイポーラ式ハサミ鉗子が
提供されていた。図12(a)はその従来のバイポーラ
式高周波ハサミ鉗子の模式図であり、一対の顎101,
102の双方に個別に電極103,104を設け、一対
の顎101,102の間に挟んだ組織105が2つの電
極103,104の間に位置させた状態で通電して組織
105を切開するようになっている。また、図12
(b)は一対の顎101,102の間に組織105を挟
み、生体組織104を切開する場合の模式図である。こ
の場合、高周波電流が図12(b)の矢印で示す如く、
双方の電極103,104を結ぶ最短直線距離で流れる
ことが理想的であるが、実際には図12(c)で示すご
とく通電路は広がりをもってしまい、鋭利な切開が困難
であった。比較的厚い粘膜を切開する場合は粘膜を挟ん
だ最初の電極103,104が比較的大きく離れ、鋭利
な切開が特に困難であった。
Hitherto, bipolar type scissors forceps have been provided as a bipolar type high frequency treatment instrument capable of confining an energized region. FIG. 12A is a schematic view of the conventional bipolar high-frequency scissors forceps, which includes a pair of jaws 101,
Electrodes 103 and 104 are individually provided on both of the electrodes 102, and the tissue 105 sandwiched between the pair of jaws 101 and 102 is placed between the two electrodes 103 and 104 to energize and incis the tissue 105. It has become. In addition, FIG.
(B) is a schematic diagram of a case where a tissue 105 is sandwiched between a pair of jaws 101 and 102 and a living tissue 104 is incised. In this case, the high frequency current is as shown by the arrow in FIG.
Ideally, the flow should be at the shortest straight line distance connecting both electrodes 103 and 104, but in reality, the current path was wide as shown in FIG. 12 (c), and it was difficult to make a sharp incision. When incising a relatively thick mucous membrane, the first electrodes 103 and 104 sandwiching the mucous membrane are relatively separated from each other, which makes it particularly difficult to make a sharp incision.

【0006】また、一対の顎101,102の間に組織
105を挟む鉗子形式では組織105を挟む前後位置で
の電極103,104間の距離が異なり、前後位置で切
開能力にばらつきが生じ、はさみ全長にわたる安定した
均一な切開が困難であった。
Further, in the forceps type in which the tissue 105 is sandwiched between the pair of jaws 101, 102, the distance between the electrodes 103, 104 at the front and rear positions where the tissue 105 is sandwiched is different, and the incision ability varies at the front and rear positions, resulting in scissors. It was difficult to make a stable and uniform incision over the entire length.

【0007】本発明は上記課題に着目してなされたもの
であり、その目的とするところは、周囲組織に切開目的
としない熱損傷を与えずに把持した生体組織のみを鋭利
に切開することが可能な高周波組織切開具を提供するこ
とにある。
The present invention has been made in view of the above-mentioned problems, and an object thereof is to sharply incise only the grasped living tissue without causing thermal damage which is not an incision to the surrounding tissue. It is to provide a possible high-frequency tissue incision tool.

【0008】[0008]

【課題を解決するための手段】本発明は、組織を把持す
る一対の顎を備えてなり、一方の顎の把持面に組織に接
触するバイポーラ電極を配設したことを特徴とする高周
波組織切開具である。
SUMMARY OF THE INVENTION The present invention comprises a pair of jaws for grasping tissue, and a bipolar electrode for contacting the tissue is disposed on the grasping surface of one jaw to dissociate high frequency tissue. It is a tool.

【0009】[0009]

【発明の実施の形態】本発明の一の実施形態に係る高周
波組織切開具を、図1乃至図5を参照して説明する。図
1は腹腔鏡下手術において内視鏡またはトロッカー等の
シースを通じて体腔内に挿入して用いる形式のバイポー
ラ鉗子1の例である。このバイポーラ鉗子1は患者の体
腔内に挿入される細長い挿入部2と、この挿入部2の基
端部に連結された操作部3を備えてなる。挿入部2の先
端部には生体組織を把握して高周波切開するバイポーラ
式の処置部4が設けられている。図2に示すように、挿
入部2のシース5の先端には上記処置部4を構成する一
対の顎10a,10bが枢着されており、一対の顎10
a,10bは図示しない回動操作用リンク機構を介して
シース5内に挿通した操作ロッド6またはワイヤを前後
に移動操作されることにより開閉する。一対の顎10
a,10bの間に生体組織をはさみ、その生体組織の部
分に高周波を通電して切開する。
BEST MODE FOR CARRYING OUT THE INVENTION A high-frequency tissue dissection tool according to one embodiment of the present invention will be described with reference to FIGS. 1 to 5. FIG. 1 shows an example of a bipolar forceps 1 of a type used by being inserted into a body cavity through a sheath such as an endoscope or a trocar in laparoscopic surgery. The bipolar forceps 1 includes an elongated insertion portion 2 that is inserted into a body cavity of a patient, and an operation portion 3 that is connected to a proximal end portion of the insertion portion 2. A bipolar treatment section 4 for grasping living tissue and performing high-frequency incision is provided at the distal end of the insertion section 2. As shown in FIG. 2, a pair of jaws 10 a and 10 b forming the treatment section 4 are pivotally attached to the distal end of the sheath 5 of the insertion section 2.
The a and 10b are opened and closed by moving the operating rod 6 or the wire inserted in the sheath 5 back and forth through a rotary operating link mechanism (not shown). A pair of jaws 10
A living tissue is sandwiched between a and 10b, and a high frequency is applied to the portion of the living tissue to make an incision.

【0010】操作部3には本体7に固定ハンドル8と移
動ハンドル9が設けられ、移動ハンドル9を回動するこ
とにより上記操作ロッド6は前後に移動し、処置部4の
顎10a,10bを開閉させる。操作部3の本体7には
バイポーラ給電口金11が設けられている。バイポーラ
給電口金11には高周波電源ユニット12から延びた給
電ケーブル13が接続されている。高周波電源ユニット
12は操作スイッチ14が付設され、この操作スイッチ
14のペダル14a,14bを操作することにより高周
波電源ユニット12の給電動作を制御できるようにして
いる。
A fixed handle 8 and a moving handle 9 are provided on a main body 7 of the operating portion 3, and by rotating the moving handle 9, the operating rod 6 is moved back and forth to move the jaws 10a, 10b of the treatment portion 4 in place. Open and close. The main body 7 of the operation unit 3 is provided with a bipolar power supply base 11. A power supply cable 13 extending from the high frequency power supply unit 12 is connected to the bipolar power supply base 11. The high frequency power supply unit 12 is provided with an operation switch 14, and the power feeding operation of the high frequency power supply unit 12 can be controlled by operating the pedals 14a and 14b of the operation switch 14.

【0011】次に、上記バイポーラ処置部4を具体的に
説明する。顎10a,10bはいずれもセラミック等の
電気的絶縁性材料によって一体に形成された電気的絶縁
性のものであるが、他の部材(金属部材を含む)と組み
合わせて構成しても良い。ただし、顎10a,10bの
外面が金属部材である場合はこの部分が少なくともバイ
ポーラ電極と電気的に絶縁された構造とする。
Next, the bipolar treatment section 4 will be specifically described. The jaws 10a and 10b are both electrically insulating and integrally formed of an electrically insulating material such as ceramic, but may be configured by combining with other members (including metal members). However, when the outer surfaces of the jaws 10a and 10b are metal members, at least this portion has a structure electrically insulated from the bipolar electrode.

【0012】また、顎10a,10bの横断面形状は図
3に示す形である。すなわち、上側の顎10aの横断面
形状は下側が尖った、いわば楔状の略逆三角形であり、
この上側の顎10aの把持面は略全長にわたり、下側の
顎10bの把持面に向かって下方へ突き出した把持突起
15となっている。把持突起15の先端部分の横断面形
状は丸みのあるものでも良い。下側の顎10bの把持面
は略全長にわたり溝状に形成した把持受け溝部16によ
り形成されている。把持受け溝部16はその溝の底面部
分が平坦であり、その溝の左右の壁面は上側が広がる傾
斜となっている。顎10a,10bを閉じたとき、上側
の顎10aにおける把持突起15の尖った先端が把持受
け溝部16の平坦部中央部分に向き合うと共に、顎10
a,10bが完全に閉じたときには両者が接合する。
The cross sectional shape of the jaws 10a and 10b is as shown in FIG. That is, the cross-sectional shape of the upper jaw 10a is a wedge-shaped substantially inverted triangle with the lower side pointed,
The gripping surface of the upper jaw 10a is substantially the entire length, and is a gripping projection 15 protruding downward toward the gripping surface of the lower jaw 10b. The cross-sectional shape of the tip portion of the grip projection 15 may be rounded. The grip surface of the lower jaw 10b is formed by a grip receiving groove portion 16 formed in a groove shape over substantially the entire length. The grip receiving groove portion 16 has a flat bottom surface portion, and the left and right wall surfaces of the groove are inclined so that the upper side expands. When the jaws 10a and 10b are closed, the sharp tip of the gripping projection 15 on the upper jaw 10a faces the central portion of the flat portion of the grip receiving groove portion 16, and
When a and 10b are completely closed, both are joined.

【0013】上述した如く、把持受け溝部16の左右壁
面は上側が広った傾斜をなしているが、この斜面角度は
上側の顎10aにおける把持突起15の楔状斜面の傾斜
に見合うように略等しいもの、あるいは図3に示すごと
く上側の顎10aの傾斜角度よりも左右に広がる角度の
ものでも良く、できれば後者の形式が良い。
As described above, the right and left wall surfaces of the grip receiving groove portion 16 are inclined so that the upper side is wide. The slope angle is substantially equal to the slope of the wedge-shaped slope of the grip projection 15 on the upper jaw 10a. Alternatively, as shown in FIG. 3, the angle may be wider to the left or right than the inclination angle of the upper jaw 10a, and the latter type is preferable if possible.

【0014】下側の顎10bの把持受け溝部16にはバ
イポーラ電極20が配置されている。すなわち、把持受
け溝部16の一方の壁面には一方の電極20aが設けら
れ、他方の壁面には別の電極20bが設けられている。
各電極20a,20bは顎10a,10bのセラミック
基盤上に設けられるので互いに電気的に絶縁されてい
る。そして、この一対の電極20a,20bによりバイ
ポーラ電極20を構成する。各電極20a,20bは下
側の顎10bの長手方向に沿って直線的に配置される。
A bipolar electrode 20 is arranged in the grip receiving groove portion 16 of the lower jaw 10b. That is, one electrode 20a is provided on one wall surface of the grip receiving groove portion 16, and another electrode 20b is provided on the other wall surface.
The electrodes 20a, 20b are provided on the ceramic bases of the jaws 10a, 10b and thus electrically insulated from each other. Then, the pair of electrodes 20a and 20b form a bipolar electrode 20. The electrodes 20a and 20b are linearly arranged along the longitudinal direction of the lower jaw 10b.

【0015】また、把持壁面から露出すると共に、把持
壁面から突き出して設けられている。電極20a,20
bは下側の顎10bの把持領域内、ここでは把持受け溝
部16の溝領域内に配置される。電極20a,20bは
別々に挿入部2のシース5及び操作部3内に構築した高
周波給電路(図示せず)を経て操作部3のバイポーラ給
電口金11に接続されている。高周波給電路としては2
本の被覆電線や同軸ケーブル等を利用することができ
る。電極20a,20bは一方の顎10bにのみ設けて
あるのでその給電路及び給電路の接続構造の構築は容易
である。電極20a,20bに対応した別々の導電路
(図示せず)を下側の顎10bに埋め込んでこの導電路
を通じて接続するようにしても良い。
Further, it is provided so as to be exposed from the grip wall surface and project from the grip wall surface. Electrodes 20a, 20
b is arranged in the grip region of the lower jaw 10b, here in the groove region of the grip receiving groove portion 16. The electrodes 20a and 20b are separately connected to the bipolar power supply base 11 of the operation part 3 via the sheath 5 of the insertion part 2 and a high-frequency power supply path (not shown) constructed in the operation part 3. 2 as a high frequency power supply line
A covered electric wire, a coaxial cable, or the like can be used. Since the electrodes 20a and 20b are provided only on one of the jaws 10b, it is easy to construct the feed line and the connection structure of the feed line. Separate conductive paths (not shown) corresponding to the electrodes 20a and 20b may be embedded in the lower jaw 10b so as to be connected through these conductive paths.

【0016】次に、このバイポーラ鉗子1を用いて鏡下
手術で粘膜を切開する場合の作用を説明する。内視鏡や
トラカール等の器具を通じて、挿入部2を患者の体腔内
に挿入し、別のメス等で予め粘膜に僅かな切り込みを入
れた小孔から下側の顎10bを差し込み、上側の顎10
aとの間で粘膜を挟み込む。すると、粘膜25は図4
(a)で示すように、上側の顎10aの把持突起15に
より下側の顎10bの把持受け溝部16内に押し込ま
れ、V字状に変形して挟み込まれる。このため、粘膜2
5を確実に把持することができる。下側の顎10bにあ
る電極20a,20bは同じ側から把持した粘膜25の
組織表面に接触する。
Next, the operation of the incision of the mucous membrane by the surgical operation using the bipolar forceps 1 will be described. The insertion part 2 is inserted into the body cavity of the patient through a device such as an endoscope and a trocar, and the lower jaw 10b is inserted from a small hole previously made in the mucous membrane with another knife to insert the lower jaw 10b into the upper jaw. 10
Insert the mucous membrane with a. Then, the mucous membrane 25 is shown in FIG.
As shown in (a), it is pushed into the grip receiving groove portion 16 of the lower jaw 10b by the grip projection 15 of the upper jaw 10a, deformed into a V shape, and sandwiched. Therefore, the mucous membrane 2
It is possible to surely grip 5. The electrodes 20a, 20b on the lower jaw 10b contact the tissue surface of the mucous membrane 25 grasped from the same side.

【0017】ここで、バイポーラ式の電極20a,20
b間に高周波を給電すると、電極20a,20bの間に
押し潰されて狭くなった粘膜25の部分に高周波が集中
的に流れ、その供給出力に応じて切開または凝固等の処
置がなされる。このとき、把持受け溝部16の溝底面は
特に平坦で広いため、上側の顎10aの把持突起15に
よりその把持受け溝部16内に粘膜25の処置すべき領
域が確実かつ十分に入り込み、平坦中央付近で粘膜25
が最も狭く押し潰される。このため、通電断面積が小さ
くなり、その粘膜25の組織部分に電極20a,20b
の間に流れる高周波が集中的に集まり、その周囲の組織
部分には分散したり漏れたりしない。従って、鋭利な切
開がなされ、より効率的な切開ができる。
Here, the bipolar electrodes 20a, 20
When a high frequency wave is supplied between the electrodes b, the high frequency wave intensively flows into the narrowed and narrowed portion of the mucous membrane 25 between the electrodes 20a and 20b, and incision or coagulation is performed according to the supply output. At this time, since the groove bottom surface of the grip receiving groove portion 16 is particularly flat and wide, the region to be treated of the mucous membrane 25 surely and sufficiently enters into the grip receiving groove portion 16 by the grip protrusion 15 of the upper jaw 10a, and near the flat center. Mucosa 25
Is crushed the narrowest. As a result, the cross-sectional area of electricity is reduced, and the electrodes 20a and 20b are attached to the tissue portion of the mucous membrane 25.
The high frequency waves that flow between the cells are concentrated and do not disperse or leak into the surrounding tissue. Therefore, a sharp incision is made and a more efficient incision can be made.

【0018】この原理を明らかにするため、図5に示す
ような実験を行なった。図(a)はセラミックの基盤3
1上に線状(長さ約1cm)に形成した一対の電極32a,
32bを1mm間隔で平行に並べ、この電極32a,32
bの間にブタ切除胃の粘膜(生体組織)を置き、セラミ
ックの刃33で押し当てて電極32a,32b間に高周
波を通電した。この実験において鋭利な粘膜切開が可能
であり、一回の通電(約1秒)にて7-8mmの粘膜を切開
することが分かった。また、径2x2cmの粘膜下剥離を
約20回の通電で施行できた。特記すべきは繰り返し通
電しても電極32a,32bに焦げが付着する事が少な
く、その切れ味が全く落ちることが無い事である。
In order to clarify this principle, an experiment as shown in FIG. 5 was conducted. Figure (a) shows a ceramic substrate 3
A pair of electrodes 32a formed in a linear shape (about 1 cm in length) on 1
32b are arranged in parallel at intervals of 1 mm, and the electrodes 32a, 32
The mucous membrane (living tissue) of the excised porcine stomach was placed between b and pressed by the ceramic blade 33 to apply a high frequency between the electrodes 32a and 32b. In this experiment, it was found that a sharp mucosal incision was possible, and a 7-8 mm mucous membrane was incised by one energization (about 1 second). Also, submucosal exfoliation with a diameter of 2 x 2 cm could be performed by energizing about 20 times. It should be noted that the electrodes 32a and 32b rarely adhere to the electrodes 32a and 32b even if they are repeatedly energized, and the sharpness thereof does not deteriorate at all.

【0019】すなわち、本実施形態によれば、切開や凝
固等の処置を施す組織の厚さの大小に拘わらず、処置し
ようとする部位の周辺組織に不要なダメージを与えるこ
となく、必要な部位をシャープに処置することができ
る。また、精度の良い処置が可能であるため、例えば、
粘膜剥離など微細な処置が必要な手技であっても十分に
対応できる。
That is, according to this embodiment, regardless of the thickness of the tissue to be treated such as incision or coagulation, the necessary tissue can be treated without causing unnecessary damage to the tissue around the region to be treated. Can be treated sharply. Also, because accurate treatment is possible, for example,
Even a procedure that requires fine treatment such as mucous membrane peeling can be sufficiently handled.

【0020】以下に、本発明の変形例を示す。図6で示
した変形例はバイポーラ処置部4の下側の顎10bに形
成する把持受け溝部16の底面が平坦ではなく、把持受
け溝部16の横断面形状を逆三角形としたものである。
The following is a modification of the present invention. In the modification shown in FIG. 6, the bottom surface of the grip receiving groove portion 16 formed in the lower jaw 10b of the bipolar treatment portion 4 is not flat, and the cross sectional shape of the grip receiving groove portion 16 is an inverted triangle.

【0021】図7で示す変形例はバイポーラの電極20
a,20bを上側の顎10aの各側面に分けて配置した
ものである。この電極20a,20bは各顎10a,1
0bを閉じたとき、下側の把持受け溝部16内に位置す
るように配置する。
The modification shown in FIG. 7 is a bipolar electrode 20.
a and 20b are separately arranged on each side surface of the upper jaw 10a. The electrodes 20a, 20b are for each jaw 10a, 1
It is arranged so as to be located in the lower grip receiving groove portion 16 when 0b is closed.

【0022】図8で示す他の変形例は処置部4の一対の
顎10a,10bを開閉操作する手段の変形例であり、
シース5内に挿通した操作ロッド6の先端に一対の顎1
0a,10bの基端部を連結し、一対の顎10a,10
bは自ら開くように付勢されている。シース5の先端チ
ップ41には各顎10a,10bの基端部にそれぞれ対
応位置して先が外側へ傾斜したガイド部42a,42b
が別々に形成されている。各顎10a,10bの基端部
には各ガイド部42a,42bに当る突起43a,43
bが形成されている。図8(a)で示すように、操作ロ
ッド6が引き込まれているときは突起43a,43bが
ガイド部42a,42bの狭い内側に位置することによ
りその突起43a,43bを介して各顎10a,10b
を締め付けるので、各顎10a,10bは閉じる。図8
(b)で示すように、操作ロッド6を押し出したときは
ガイド部42a,42bの広がった先端側に突起43
a,43bが位置するので、各顎10a,10bはそれ
自身の弾性力で開く。この開閉機構はリンク機構を構成
しないのでシンプルな構成になり、また、各顎10a,
10bを閉じるときの強度が一般に強くなる。
Another modification shown in FIG. 8 is a modification of the means for opening and closing the pair of jaws 10a, 10b of the treatment section 4,
A pair of jaws 1 is attached to the distal end of the operation rod 6 inserted into the sheath 5.
0a, 10b are connected to each other at their base ends, and a pair of jaws 10a, 10b
b is urged to open himself. The distal tip 41 of the sheath 5 has guide portions 42a, 42b which are positioned corresponding to the base end portions of the jaws 10a, 10b and whose tips are inclined outward.
Are formed separately. Protrusions 43a, 43 for contacting the guide portions 42a, 42b are provided at the base ends of the jaws 10a, 10b.
b is formed. As shown in FIG. 8 (a), when the operating rod 6 is retracted, the protrusions 43a and 43b are located inside the narrow guide portions 42a and 42b. 10b
, So that each jaw 10a, 10b is closed. Figure 8
As shown in (b), when the operating rod 6 is pushed out, the protrusion 43 is formed on the tip end side where the guide portions 42a and 42b are widened.
Since jaws a and 43b are located, each jaw 10a and 10b opens with its own elastic force. Since this opening / closing mechanism does not form a link mechanism, it has a simple structure, and each jaw 10a,
The strength when closing 10b is generally stronger.

【0023】最後に、処置具において、一方の顎の把持
面に形成した溝の向き合う一方の壁面と他方の壁面にそ
れぞれバイポーラ電極を配置し、他方の顎には上記溝内
に入り込む把持突起を形成した形式の高周波切開具が如
何にして得られたかの経緯を説明する。
Finally, in the treatment instrument, bipolar electrodes are arranged on one wall surface and the other wall surface of the groove formed on the gripping surface of one jaw, respectively, which face each other, and the other jaw has a gripping projection that enters the groove. A description will be given of how the high-frequency incision device of the formed type was obtained.

【0024】まず、図9(a)に示すように、一対の顎
51a,51bがいずれも平板状の電気的絶縁体で形成
され、これら顎51a,51bがいずれも平坦な把持面
52a,52bを形成した高周波組織切開具において
は、一方の顎52aの把持面52aに一対の線状のバイ
ポーラ電極54a,54bを並列に設置することによ
り、バイポーラ電極54a,54b間の距離を一定に保
つことができる。また、バイポーラ式の電極54a,5
4bを設ける下側の顎51bの把持面52aが溝状では
なく平坦なものであり、これでも上記同様の作用効果は
得られる。
First, as shown in FIG. 9 (a), the pair of jaws 51a, 51b are both formed of a flat electrical insulator, and the jaws 51a, 51b are both flat gripping surfaces 52a, 52b. In the high-frequency tissue incision tool having the shape, the pair of linear bipolar electrodes 54a and 54b are installed in parallel on the gripping surface 52a of the one jaw 52a to keep the distance between the bipolar electrodes 54a and 54b constant. You can In addition, the bipolar electrodes 54a, 5
The gripping surface 52a of the lower jaw 51b on which the 4b is provided is not a groove shape but a flat one, and the same effect as above can be obtained.

【0025】しかし、図9(b)に示すように、生体組
織55を一対の顎51a,51bの間に把持したとき、
生体組織55は他方の顎51bによって一対の電極54
a,54bに密着させられるため、通電した場合の電流
は把持された生体組織55内を同図9(b)の矢印のよ
うに流れ、電極54a,54bの間の生体組織55が全
体的に一様に加熱する。このような加熱ではさらなる鋭
利な切開は不可能である。
However, as shown in FIG. 9B, when the living tissue 55 is grasped between the pair of jaws 51a and 51b,
The biological tissue 55 has a pair of electrodes 54 formed by the other jaw 51b.
Since it is brought into close contact with a and 54b, the electric current when energized flows in the grasped living tissue 55 as shown by the arrow in FIG. 9B, and the living tissue 55 between the electrodes 54a and 54b is entirely Heat evenly. No further sharp dissection is possible with such heating.

【0026】そこで、図10(a)に示すごとく、楔状
に加工した絶縁体の顎51bを用いて生体組織55を把
持するようにして、バイポーラ電極54a,54b間に
生体組織55を圧着させると、図10(b)に示すごと
く圧縮された生体組織55の一部分においてのみ抵抗が
高くなり、ジュールの法則により局部に限局して高度な
発熱が得られる。このような構造により、いわば線状に
圧縮された生体組織55の極めて鋭利な切開が可能とな
ったのである。
Therefore, as shown in FIG. 10A, when the living tissue 55 is clamped between the bipolar electrodes 54a and 54b by using the wedge-shaped insulator jaws 51b to grip the living tissue 55. As shown in FIG. 10B, the resistance is increased only in a part of the living tissue 55 that is compressed, and a high degree of heat generation is obtained by confining it locally according to Joule's law. With such a structure, it is possible to make an extremely sharp incision in the biological tissue 55 compressed in a linear manner.

【0027】また、鏡視下手術に用いる処置具の挿入部
は少な<とも外径5mm以下、経内視鏡的に用いる場合は
外径が3mm以下とかなり細径なものでなければならず、
一対の顎51a,51bの基端部の回動操作用リンク機
構に十分な強度を持たせることが一般には困難である。
生体内で一方の楔状に形成した絶縁体からなる顎51b
を、他方の顎51aに設けた一対の電極54a,54b
間(幅1mm前後)に正確に押し当てることは回動操作用リ
ンク機構の強度に頼ることでは限界がある。
Further, the insertion portion of the treatment instrument used in the arthroscopic surgery must be at least <5 mm in outer diameter, and if used endoscopically, the outer diameter must be 3 mm or less, which is considerably small. ,
It is generally difficult to provide the rotating operation link mechanism at the base ends of the pair of jaws 51a and 51b with sufficient strength.
A jaw 51b formed of one wedge-shaped insulator in the living body
A pair of electrodes 54a, 54b provided on the other jaw 51a
There is a limit in accurately pressing the space (around 1 mm) by relying on the strength of the rotary operation link mechanism.

【0028】そこで、図11(a)(b)に示すごとく
一対の電極54a,54bを設置する顎51aの把持面
を凹状に形成する。このような構造とすることにより、
一対の顎51a,51bに多少のぐらつきがあっても、
一方の楔状の顎51bが他方の顎51a一対の電極54
a,54bの間に正確に安定して押し当てることが可能
となるのである。
Therefore, as shown in FIGS. 11 (a) and 11 (b), the gripping surface of the jaw 51a on which the pair of electrodes 54a and 54b is installed is formed in a concave shape. With such a structure,
Even if the pair of jaws 51a and 51b have some wobbling,
One wedge-shaped jaw 51b is the other jaw 51a A pair of electrodes 54
It is possible to press accurately and stably between a and 54b.

【0029】また、一対の電極54a,54bを凹状の
絶縁体の内側に設置することで、高周波電流の通電する
領域を処置部内に限局できることから、周囲生体組織へ
の熱損傷を回避することが可能となった。
Further, by disposing the pair of electrodes 54a, 54b inside the concave insulator, the region through which the high-frequency current flows can be localized within the treatment section, so that thermal damage to surrounding living tissue can be avoided. It has become possible.

【0030】尚、本発明は前述した各実施形態に限定さ
れるものではなく、他の形態にも適用が可能である。ま
た、軟性内視鏡のチャンネルを通じて体腔内に挿入して
使用する場合等ではその挿入部をチャンネルに挿通でき
る径で可撓性の構成とするとよい。
The present invention is not limited to the above-mentioned embodiments, but can be applied to other forms. In addition, when it is used by inserting it into a body cavity through a channel of a flexible endoscope, it is preferable that the insertion portion has a diameter that allows it to be inserted into the channel and has a flexible structure.

【0031】[0031]

【発明の効果】以上説明したように、本発明によれば、
切開する生体組織の周囲に不要な、予期せぬ通電による
熱損傷を与えることなく、本高周波組織切開具にて把持
した生体組織のみを鋭利に切開することが可能である。
例えば、早期胃癌の内視鏡的切除術のように、1mm単位
での切開が要求される微細な処置に十分に対応できる。
As described above, according to the present invention,
It is possible to sharply cut only the living tissue grasped by the present high-frequency tissue cutting tool, without giving unnecessary heat damage due to unexpected electric current around the living tissue to be cut.
For example, it can sufficiently cope with a minute treatment that requires an incision in units of 1 mm, such as an endoscopic resection of early gastric cancer.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の一実施形態に係るバイポーラ鉗子の説
明図。
FIG. 1 is an explanatory diagram of a bipolar forceps according to an embodiment of the present invention.

【図2】上記バイポーラ鉗子の処置部の斜視図。FIG. 2 is a perspective view of a treatment portion of the bipolar forceps.

【図3】上記バイポーラ鉗子の処置部の横断面図。FIG. 3 is a cross-sectional view of a treatment portion of the bipolar forceps.

【図4】上記バイポーラ鉗子の処置部の使用状態説明
図。
FIG. 4 is an explanatory view of a usage state of a treatment portion of the bipolar forceps.

【図5】上記バイポーラ鉗子の処置部による処置作用の
原理説明図。
FIG. 5 is an explanatory view of the principle of the treatment action by the treatment portion of the bipolar forceps.

【図6】上記バイポーラ鉗子の変形例を示す処置部横断
面図。
FIG. 6 is a cross-sectional view of a treatment portion showing a modified example of the bipolar forceps.

【図7】上記バイポーラ鉗子の他の変形例を示す処置部
横断面図。
FIG. 7 is a cross-sectional view of a treatment portion showing another modified example of the bipolar forceps.

【図8】上記バイポーラ鉗子の変形例を示す説明図。FIG. 8 is an explanatory view showing a modified example of the bipolar forceps.

【図9】高周波切開具において一方の顎に溝を形成し、
他方の顎には把持突起を形成した形式を得るまでの説明
図。
FIG. 9 is a schematic view showing a high-frequency incision device having a groove formed on one jaw,
Explanatory drawing until obtaining a form in which a gripping protrusion is formed on the other jaw.

【図10】同じく高周波切開具において一方の顎に溝を
形成し、他方の顎には把持突起を形成した形式を得るま
での説明図。
FIG. 10 is an explanatory view until obtaining a form in which a groove is formed in one jaw and a gripping protrusion is formed in the other jaw in the same high-frequency incision tool.

【図11】同じく高周波切開具において一方の顎に溝を
形成し、他方の顎には把持突起を形成した形式を得るま
での説明図。
FIG. 11 is an explanatory view until obtaining a form in which a groove is formed in one jaw and a grip projection is formed in the other jaw in the same high-frequency incision tool.

【図12】従来のバイポーラ高周波ナイフの原理説明
図。
FIG. 12 is an explanatory view of the principle of a conventional bipolar high frequency knife.

【符号の説明】[Explanation of symbols]

1…バイポーラ鉗子、4…処置部、10a.10b…
顎、15…把持突起、16…溝部、20…バイポーラ電
極、20a.20b…電極、25…粘膜。
1 ... Bipolar forceps, 4 ... Treatment part, 10a. 10b ...
Jaw, 15 ... Gripping protrusion, 16 ... Groove, 20 ... Bipolar electrode, 20a. 20b ... Electrode, 25 ... Mucous membrane.

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】 組織を把持する一対の顎を備えてなり、
一方の顎の把持面に上記一対の顎で把持した組織に接触
するバイポーラ電極を配設したことを特徴とする高周波
組織切開具。
1. A pair of jaws for grasping tissue is provided,
A high-frequency tissue dissection tool, wherein a bipolar electrode that comes into contact with the tissue grasped by the pair of jaws is provided on the grasping surface of one jaw.
【請求項2】 一方の顎の把持面に配置されたバイポー
ラ電極の電極間領域に向けて突き出し、その電極間領域
において把持する組織を上記電極間領域に向けて押し付
ける把持突起を、他方の顎に形成したことを特徴とする
請求項1に記載の高周波組織切開具。
2. A grasping protrusion protruding toward an inter-electrode region of a bipolar electrode arranged on a grasping surface of one jaw and pressing a tissue to be grasped in the inter-electrode region toward the inter-electrode region, a grasping protrusion being provided on the other jaw. The high-frequency tissue incision tool according to claim 1, wherein the high-frequency tissue incision tool is formed.
【請求項3】 一方の顎の把持面に溝を形成し、この溝
の向き合う一方の壁面と他方の壁面にバイポーラ用電極
を配置し、他方の顎には組織を把持したとき、上記溝内
に入り込む把持突起を形成したことを特徴とする請求項
1に記載の高周波組織切開具。
3. A groove is formed on the gripping surface of one jaw, bipolar electrodes are arranged on one wall surface and the other wall surface of the groove facing each other, and when a tissue is gripped on the other jaw, the inside of the groove The high-frequency tissue dissection instrument according to claim 1, wherein a grasping protrusion that penetrates the incision is formed.
JP2002012063A 2002-01-21 2002-01-21 High frequency tissue incision instrument Pending JP2003210483A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2002012063A JP2003210483A (en) 2002-01-21 2002-01-21 High frequency tissue incision instrument

Publications (1)

Publication Number Publication Date
JP2003210483A true JP2003210483A (en) 2003-07-29

Family

ID=27649382

Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Status (1)

Country Link
JP (1) JP2003210483A (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008018226A (en) * 2006-07-11 2008-01-31 Olympus Medical Systems Corp Treating apparatus
JP2010017224A (en) * 2008-07-08 2010-01-28 Olympus Medical Systems Corp High-frequency treatment instrument
JP2013518681A (en) * 2010-02-04 2013-05-23 アエスクラップ アーゲー Laparoscopic high-frequency surgical device
JP2015204974A (en) * 2014-04-18 2015-11-19 オリンパス株式会社 therapeutic treatment device
JP2018140222A (en) * 2013-03-15 2018-09-13 ジャイラス エーシーエムアイ インク Electrosurgical instrument
CN109475380A (en) * 2016-07-19 2019-03-15 奥林巴斯株式会社 Treatment apparatus
US10828087B2 (en) 2013-03-15 2020-11-10 Gyrus Acmi, Inc. Hand switched combined electrosurgical monopolar and bipolar device
US10893900B2 (en) 2013-03-15 2021-01-19 Gyrus Acmi, Inc. Combination electrosurgical device
US11744634B2 (en) 2013-03-15 2023-09-05 Gyrus Acmi, Inc. Offset forceps
US11779384B2 (en) 2013-03-15 2023-10-10 Gyrus Acmi, Inc. Combination electrosurgical device

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008018226A (en) * 2006-07-11 2008-01-31 Olympus Medical Systems Corp Treating apparatus
JP2010017224A (en) * 2008-07-08 2010-01-28 Olympus Medical Systems Corp High-frequency treatment instrument
KR101786410B1 (en) * 2010-02-04 2017-10-17 아에스쿨랍 아게 Laparoscopic radiofrequency surgical device
JP2015186579A (en) * 2010-02-04 2015-10-29 アエスクラップ アーゲー electrosurgical device
KR101733942B1 (en) 2010-02-04 2017-05-08 아에스쿨랍 아게 Laparoscopic radiofrequency surgical device
JP2013518681A (en) * 2010-02-04 2013-05-23 アエスクラップ アーゲー Laparoscopic high-frequency surgical device
JP2018140222A (en) * 2013-03-15 2018-09-13 ジャイラス エーシーエムアイ インク Electrosurgical instrument
US10828087B2 (en) 2013-03-15 2020-11-10 Gyrus Acmi, Inc. Hand switched combined electrosurgical monopolar and bipolar device
US10893900B2 (en) 2013-03-15 2021-01-19 Gyrus Acmi, Inc. Combination electrosurgical device
US11224477B2 (en) 2013-03-15 2022-01-18 Gyrus Acmi, Inc. Combination electrosurgical device
US11744634B2 (en) 2013-03-15 2023-09-05 Gyrus Acmi, Inc. Offset forceps
US11779384B2 (en) 2013-03-15 2023-10-10 Gyrus Acmi, Inc. Combination electrosurgical device
US11957401B2 (en) 2013-03-15 2024-04-16 Gyrus Acmi, Inc. Electrosurgical instrument
JP2015204974A (en) * 2014-04-18 2015-11-19 オリンパス株式会社 therapeutic treatment device
CN109475380A (en) * 2016-07-19 2019-03-15 奥林巴斯株式会社 Treatment apparatus

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