JP3959158B2 - Surgical pinsets - Google Patents

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Publication number
JP3959158B2
JP3959158B2 JP21827997A JP21827997A JP3959158B2 JP 3959158 B2 JP3959158 B2 JP 3959158B2 JP 21827997 A JP21827997 A JP 21827997A JP 21827997 A JP21827997 A JP 21827997A JP 3959158 B2 JP3959158 B2 JP 3959158B2
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tweezers
incision
arm
tip
bipolar
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JP21827997A
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JPH1147152A (en
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伸広 鏡沼
裕亮 荒木田
智彦 浅原
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Johnson and Johnson KK
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Johnson and Johnson KK
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Description

【0001】
【産業上の利用分野】
本発明は、外科手術、主として脳神経外科手術において、止血及び切開操作に用いられる手術用ピンセット、特に双極電気凝固及び切開用ピンセットに関するものである。
【0002】
【従来の技術】
従来より外科手術、特に脳神経外科の血管手術においては、高周波電気発生装置に接続する双極の電極を備え、互いに絶縁され、腕先端部の双極電気凝固及び切開部が常態時は開放状態を維持するよう付勢され、腕先端部の双極電気凝固及び切開部を除いて絶縁皮膜を形成した2本の腕を有する手術用ピンセットとして双極電気凝固・切開用ピンセットが使用されており、ピンセットの腕先端の双極電気凝固及び切開部で生体組織を挟持し高周波電流を通電することにより、凝固あるいは切開することが可能である。
【0003】
近年、前記ピンセットの腕の一方の内側には潅流管が配設してあり、必要より生理食塩水またはその他の液体が流出されることにより高周波の通電による凝固及び切開操作時の発熱温度を低下させることなどにより生体組織への損傷を最小限におさえると共に焼灼された生体組織部分がピンセットの腕先端部の双極電気凝固及び切開部に付着することによる凝固能及び切開能の低下を妨いでいる。
【0004】
しかし、実際の脳神経外科手術においては、特にピンセットの腕先端部の双極電気凝固及び切開部に焼灼組織が付着し易い手術(たとえば原発性脳腫瘍(グリオーマ)等)では比較的長い時間凝固操作を続ける場合が多く、潅流誘導手段等が施されていない側の腕の先端部には、焼灼された組織がより付着する現象が頻繁に発生し凝固能及び切開能の低下を十分に防止することが困難であった。従って、前記不具合の発生により、脳神経外科手術において手術時間の延長を強いられ、患者のみならず術者にも大きな負担がかかることが問題となっていた。
【0005】
本発明者が鋭意研究した結果、これは潅流管のない腕の先端部内側には潅流液がほとんどないことによることが判明した。
【0006】
【発明が解決しようとする課題】
本発明は、主として脳神経外科電気式手術において、ピンセット先端での安定で有効的な高周波電流通電が可能な手術用ピンセット、特に双極電気凝固及び切開用ピンセットを提供することを目的とする。
【0007】
【発明が解決しようとする手段】
上記の課題を解決するために本発明者は、双極電気凝固及び切開用ピンセットにおいて、一方の腕に潅流管を備え、この腕と対面し潅流管を配していない他方の腕先端部内側に細長い陥没部を設けた構造とするという極めて簡単な構造をとることで、潅流管を備えていない腕先端部内側にも潅流液を保持させることができ、結果としてピンセット腕先端部の双極電気凝固及び切開部に生体組織あるいは血管の一部が付着する焼き付き現象の防止効果を飛躍的に向上させることができ、凝固能及び切開能の低下を防止できることを見出した。
【0008】
【発明の実施形態】
以下、本発明の実施例を図面に基づいて詳細に説明する。
【0009】
図1は、本発明の一実施例に係る双極電気凝固及び切開用ピンセット1の平面図である。また、図2は潅流管が配されている側の腕の内側表面図を、図3は潅流管を配していない側の腕の内側表面を示したものである。腕2、3は、腕先端部の双極電気凝固及び切開部9、10及び絶縁されたグリップ部4、5をそれぞれ有する。つまり各腕2、3は、腕先端部の双極電気凝固及び切開部を除き表面部2a、3aにおいて電気絶縁物のコーティングによりピンセット本体に絶縁皮膜を形成され、また各腕2、3は、各電極6、7と接続しており電気絶縁物の接着剤にて固定されているハウジンク部8において互いに絶縁され、ピンセットの腕先端部の双極電気凝固及び切開部が常態時は開放状態を維持するよう付勢されている。
【0010】
該ピンセットにおいて潅流管を配した腕には潅流管開口部から先端に向けて潅流液誘導手段としての溝状流路15を配し対面するもう一方の潅流管を配していない腕には、腕先端の双極電気凝固及び切開部の末端(10a)から好ましくは約0.50〜8.00mm後方(10b)から潅流液保有手段としての細長い陥没部21の配設が開始され長さ約5.0〜50.0mmで配設されている。更に好ましくは該細長い陥没部21が幅0.10mm〜3.00mm、深さ0.05〜3.00mmの範囲で形成されていることにより潅流液を十分保持することができる。ここで注目すべきことは、細長い陥没部は双極電気凝固及び切開部の先部までは至しない方が通電する部分を大きく確保できるので好ましいことである。
【0011】
前記寸法はピンセット本体の形状・大きさに依存するが、一般的に該細長い陥没部21のこれらの寸法範囲から外側に外れてしまうと、該ピンセットの腕の双極電気凝固及び切開部の形状が大きくなるのを強いられ、特に微細な動きが求められる脳神経外科の顕微鏡下手術等において実使用不可能となる、また、これらの寸法範囲から内側に外れてしまうと、該ピンセットの腕の双極電気凝固及び切開部へ潅流液が表面張力により保持できる範囲を超えてしまい潅流液が落下してしまうことから、高周波電流の通電した際には焼灼された組織が該ピンセットの腕の双極電気凝固及び切開部へ簡単に焼き付き現象が起こり、該細長い陥没部21への組織片のつまり等を引き起こすことから安定で充分な双極電気凝固及び切開操作が困難となるため使用上好ましくない。
【0012】
図11から図15に示したとおり、該細長い陥没部21の断面形状は手術に使用される潅流液の性質により表面張力が異なることから適宜各種形状、たとえば四角形、(空中へ向かって開いた)三角形、台形、半円形、又は半だ円形などから選ばれ、さらに断面形状は溝の断面面積が長さ方向に連続的又はほぼ連続的に変化することもできる。
【0013】
また、図16から図19に示したとおり、該細長い陥没部21の平面形状も手術に使用される潅流液の性質及びピンセットの腕の双極電気凝固及び切開部の形状に合致するように各種形状を適宜選ぶことができ、たとえば三角形、台形、四角形、涙滴形などから選択される。
【0014】
潅流管を配したピンセットの腕の構造については、先に提案されているように潅流管が腕の内側にその全部または一部が埋め込まれたもの(特許2530413)、そしてピンセットの腕の先端部には潅流管開口部から腕先端に向かって潅流液誘導手段としての溝状流路を備えたもの(特願平8−325837)、腕先端の双極電気凝固及び切開部全体に24カラットの金を鍍着したもの(特開平7−27525)が提案されているが、これらの従来発明と本発明を組み合わせることで、生体組織あるいは血管の一部が腕先端、特に潅流管のない側の双極電気凝固及び切開部へ付着する焼き付き現象の防止効果を最大限に引き出すことが可能となる。
【0015】
本発明に示されるような構造になっていると該ピンセットで挟持した際、潅流管を配した腕には潅流液が供給され、潅流液の表面張力により、双方の腕が完全に接触しなくとも潅流液が対面するもう一方の腕先端の細長い陥没部に移動させることができ、そして該陥没部に潅流液を保有させることにより、潅流管のない腕先端においても焼灼された生体組織等が腕先端の双極電気凝固及び切開部へ付着するのを防止できる。このことにより、高周波電流の通電をする際、各腕先端の双極電気凝固及び切開部にて長時間安定で有効な電気式手術が可能となる。
【0016】
本発明の一実施例に係わるピンセットと各装置との使用例を図4の接続配置図により説明する。双極電気凝固及び切開用ピンセット1は、高周波発生装置16で発生させた高周波電流をバイポーラコード17により伝えられるように構成されている。また、生理食塩水等の潅流液は潅流液源18から輸液チューブ19を通して潅流制御装置20へ送られ、流速をコントロールしながら更にバイポーラピンセット1内の潅流管に流れるように接続されている。
【0017】
【比較例及び実施例】
比較例として次の3種の手術用ピンセットを用意した。ピンセットAとして図5に示したとおりの潅流管がない及びピンセットの腕の先端に細長い陥没部のない従来のピンセット(コッドマン(商標) 品番 80−1550チタン合金)と、ピンセットBとして図6に示したピンセットの腕の先端に細長い陥没部のない潅流式市販のピンセット(ジョンソン・エンド・ジョンソン メディカル株式会社 品番 80−9000チタン合金)と、ピンセットCとして図7に示したとおり一方の腕に潅流管を配し潅流管の先端開口部と腕先端の双極電気凝固及び切開部との間に潅流液誘導手段としての溝状流路を設けて一方のピンセットの腕の先端に細長い陥没部のないピンセットを用意した。本発明の実施例を示すためにつぎの3種の手術用ピンセットを用意した。つまり、ピンセットDとして一方の腕に潅流管を配し、他方の潅流管を配していない腕先端の双極電気凝固及び切開部の末端から約2.00mm後方から潅流液保有手段としての細長い陥没部21を配し、細長い陥没部の平面形状が四角形をした形状にて長さ約16.0mm、幅0.50mm、深さ0.1〜1.50mmの範囲で断面形状は四角形で溝の断面面積が長さ方向に連続的に変化し形成されている該細長い陥没部を設けた構造のピンセットD(図8)、ピンセットEとして一方の腕に潅流管を配し潅流管の先端開口部と腕先端の双極電気凝固及び切開部との間に潅流液誘導手段としての溝状流路を設け、更に他方の潅流管を配していない腕先端内側にピンセットD同様の細長い陥没部を設けた構造のピンセット(図9)、そしてピンセットEと同形状のピンセットに双極電気凝固及び切開部に24カラットの金を鍍着したピンセットF(図10)のそれぞれ構造の異なる双極電気凝固及び切開用ピンセットを6本用意して、潅流液源と双極電気凝固及び切開用ピンセットを接続するための輸液チューブ(コッドマン イリゲーションチュービングセット 品番80−1165)と適切な量の潅流液を供給するための潅流液制御装置(コッドマンマリス(商標)イリゲーション モジュール 品番 80−1169)を潅流チューブの中間に配設し、潅流液の流出を毎分20cc程度に制御した状態とし、また高周波発生装置(コッドマン CMC- (商標)品番80−1170)で凝固モード、マリス出力35で設定された高周波電流をバイポーラコード(コッドマン(商標)バイポーラコード 品番80−1536)により双極電気凝固及び切開用ピンセットに伝えられるように構成した。
【0018】
実際の脳神経外科顕微鏡下手術で、もともと生体組織の焼灼の少ない脳動脈瘤等の症例ではなく、特に生体組織が焼灼し易い原発性脳腫瘍(グリオーマ)摘出術において病巣部位へのアプローチの際に使用し、前記した従来の双極電気凝固及び切開用ピンセット3種類(ピンセットAからC)と、本発明の実施例に係わる双極電気凝固及び切開用ピンセットDとピンセットEそして、ピンセットFを比較した。ピンセット使用時間は1回につき20分とし、それぞれの双極電気凝固及び切開用ピンセットにつき3回実施して平均をとった。ピンセット腕先端の双極電気凝固及び切開部拭き取り平均回数、連続使用可能平均時間を以下の表に示す。
【0019】
【表1】

Figure 0003959158
【0020】
実際の脳神経外科顕微鏡下手術での、特に生体組織が焼灼し易い原発性脳腫瘍(グリオーマ)摘出術において、従来のピンセット(A−C)と本発明の一実施例に係わるピンセット(D−F)で比較すると本発明の一実施例に係わるピンセットが安定で有効的な高周波電流の通電が可能となることで本発明の有用性が確認された。また、本発明の一実施例に係わるピンセットに合わせて双極電気凝固及び切開部に24カラットの金を鍍着すること(特開平7−27525)、及び潅流管の先端開
口部と双極電気凝固及び切開部の先端との間に潅流液誘導手段としての溝状流路を配設すること(特願平8−325837)を組み合わせることでさらなる本発明の有用性が確認された。
【0021】
【発明の効果】
以上説明したように、本発明にかかる手術用ピンセットによれば、一方の腕に潅流管を配し、この腕と対面する潅流管を配していない腕先端内側に細長い陥没部を設けるという極めて簡単な構成で、主として脳神経外科顕微鏡下手術において、安定で有効な電気式手術が可能となる。
【0022】
さらに、手術時の連続使用においても潅流液の流出は順調で、術中にピンセットの腕先端の双極電気凝固及び切開部に焼灼した生体組織をガーゼ等にて拭き取る作業が減少する。その結果、ピンセットを交換する作業を防止できるため、手術時間を大幅に短縮することができることにより患者のみならず術者及び介助者の負担が軽減される。
【図面の簡単な説明】
【図1】図1は、本発明の一実施例に係わるピンセットの平面図。
【図2】図2は、本発明の一実施例に係わるピンセットの潅流管を配した側の腕の内側表面を示した図、及びその先端部の拡大図。
【図3】図3は、本発明の一実施例に係わるピンセットの潅流管を配していない側の腕の内側表面を示した図、及びその先端部の拡大図。
【図4】図4は、本発明の一実施例に係わるピンセットと各装置との接続配置図。
【図5】図5は、従来のピンセットA(潅流なし)の腕先端の双極電気凝固及び切開部の平面図。
【図6】図6は、従来のピンセットB(潅流式)の腕先端の双極電気凝固及び切開部の平面図。
【図7】図7は、従来のピンセットC(潅流式かつ潅流管先端に溝を備えもの)の腕先端の双極電気凝固及び切開部の平面図。
【図8】図8は、本発明の一実施例に係わるピンセットDの腕先端の双極電気凝固及び切開部の平面図。
【図9】図9は、本発明の一実施例に係わるピンセットEの腕先端の双極電気凝固及び切開部の平面図。
【図10】図10は、本発明の一実施例に係わるピンセットFの腕先端の双極電気凝固及び切開部の平面図。
【図11】図11は、本発明の一実施例に係わるピンセットの先端部における細長い陥没部の一断面図。
【図12】図12は、本発明の一実施例に係わるピンセットの先端部における細長い陥没部の一断面図。
【図13】図13は、本発明の一実施例に係わるピンセットの先端部における細長い陥没部の一断面図。
【図14】図14は、本発明の一実施例に係わるピンセットの先端部における細長い陥没部の一断面図。
【図15】図15は、本発明の一実施例に係わるピンセットの先端部における細長い陥没部の一断面図。
【図16】図16は、本発明の一実施例に係わるピンセットの先端部における細長い陥没部の一平面図。
【図17】図17は、本発明の一実施例に係わるピンセットの先端部における細長い陥没部の一平面図。
【図18】図18は、本発明の一実施例に係わるピンセットの先端部における細長い陥没部の一平面図。
【図19】図19は、本発明の一実施例に係わるピンセットの先端部における細長い陥没部の一平面図。
【符号の説明】
1 本体
2 腕
3 腕
2a 表面部
3a 表面部
4 グリップ部
5 グリップ部
6 電極
7 電極
8 ハウジング部
9 腕先端の双極電気凝固及び切開部
10 腕先端の双極電気凝固及び切開部
10a 腕先端の双極電気凝固及び切開部の末端
10b 腕先端の双極電気凝固及び切開部の細長い陥没部先端
11 溝
12 潅流管
13 潅流接続口
14 接着剤
15 溝状流路
16 高周波発生装置
17 バイポーラコード
18 潅流液源
19 輸液チューブ
20 潅流制御装置
21 細長い陥没部
22 金鍍金部[0001]
[Industrial application fields]
The present invention relates to surgical tweezers used for hemostasis and incision operations, particularly bipolar electrocoagulation and incision tweezers in surgery, mainly neurosurgery.
[0002]
[Prior art]
Conventionally, in surgical operations, especially neurosurgery vascular surgery, bipolar electrodes connected to a high-frequency electricity generator are provided, insulated from each other, and the bipolar electrocoagulation and incision at the arm tip are normally kept open. Bipolar electrocoagulation and incision tweezers are used as surgical tweezers having two arms formed with an insulating film except for bipolar electrocoagulation and incision at the arm tip. It is possible to coagulate or incise the body by sandwiching the living tissue between the bipolar electrocoagulation and the incision part and applying a high-frequency current.
[0003]
In recent years, a perfusion tube has been placed inside one of the arms of the tweezers, so that physiological saline or other liquid can flow out more than necessary to reduce the heat generation temperature during coagulation and incision operations due to high-frequency energization. To minimize damage to living tissue and prevent coagulation ability and incision ability from deteriorating due to the cauterized living tissue portion adhering to the bipolar electrocoagulation and incision at the tip of the arm of tweezers .
[0004]
However, in actual neurosurgery, the coagulation operation is continued for a relatively long time, particularly in bipolar electrocoagulation at the tip of the arm of the tweezers and in surgery (for example, primary brain tumor (glioma)) where cauterized tissue tends to adhere to the incision. In many cases, a phenomenon in which cauterized tissue adheres more frequently occurs at the tip of the arm on the side where the perfusion induction means or the like is not applied, and it is possible to sufficiently prevent a decrease in coagulation ability and incision ability. It was difficult. Therefore, due to the occurrence of the above problems, it has been a problem that the operation time is forced to be extended in neurosurgery, and not only the patient but also the surgeon is heavily burdened.
[0005]
As a result of intensive studies by the inventor, it has been found that this is due to the fact that there is almost no perfusate inside the tip of the arm without a perfusion tube.
[0006]
[Problems to be solved by the invention]
An object of the present invention is to provide surgical tweezers, particularly bipolar electrocoagulation and incision tweezers, capable of stable and effective high-frequency current conduction at the tip of tweezers mainly in neurosurgical electrosurgery.
[0007]
Means to be Solved by the Invention
In order to solve the above-mentioned problems, the present inventor, in bipolar electrocoagulation and incision tweezers, has a perfusion tube on one arm and faces the arm on the inner side of the other arm tip portion where no perfusion tube is arranged. By adopting an extremely simple structure with an elongated depression, the perfusate can be retained inside the arm tip without a perfusion tube, resulting in bipolar electrocoagulation at the tweezer arm tip. It has also been found that the effect of preventing a burn-in phenomenon in which a part of a living tissue or blood vessel adheres to the incision can be dramatically improved, and a decrease in coagulation ability and incision ability can be prevented.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0009]
FIG. 1 is a plan view of a bipolar electrocoagulation and incision tweezer 1 according to an embodiment of the present invention. FIG. 2 shows an inner surface of the arm on the side where the perfusion tube is arranged, and FIG. 3 shows an inner surface of the arm on the side where the perfusion tube is not arranged. Arms 2, 3 have bipolar electrocoagulation and incisions 9, 10 at the arm tip and insulated grips 4, 5 respectively. That is, the arms 2 and 3 are each provided with an insulating film on the tweezers body by coating with an electrical insulator on the surface portions 2a and 3a except for bipolar electrocoagulation and incision at the tip of the arm. It is insulated from each other in the housing 8 connected to the electrodes 6 and 7 and fixed with an adhesive of an electrical insulator, and the bipolar electrocoagulation and incision at the arm tip of the tweezers is kept open at normal times. It is urged to do so.
[0010]
In the arm in which the perfusion tube is arranged in the tweezers, the groove-like flow channel 15 as the perfusate guiding means is arranged from the perfusion tube opening toward the tip, and the other perfusion tube facing the arm is not arranged. Bipolar electrocoagulation at the tip of the arm and disposition of the elongated depression 21 as the perfusate holding means are preferably started from the rear (10b) of about 0.50 to 8.00 mm from the end (10a) of the incision. It is arranged at 0.0 to 50.0 mm. More preferably, the elongate depression 21 is formed with a width of 0.10 mm to 3.00 mm and a depth of 0.05 to 3.00 mm, so that the perfusate can be sufficiently retained. What should be noted here is that it is preferable that the elongated depressed portion does not reach the tip of the bipolar electrocoagulation and incision portion because a large portion can be secured.
[0011]
The dimensions depend on the shape and size of the tweezer body. Generally, if the dimension of the elongated depression 21 is outside the dimension range, the bipolar electrocoagulation of the arm of the tweezers and the shape of the incision portion are formed. If it is forced to become large and becomes practically unusable in a neurosurgery under a neurosurgery that requires fine movement, etc., and if it falls outside these dimensional ranges, the bipolar electric of the arm of the tweezers Since the perfusate falls beyond the range that can be retained by the surface tension to the coagulation and incision, and the perfusate falls, the cauterized tissue is subjected to bipolar electrocoagulation of the arms of the tweezers and the tweezers arm when energized with a high frequency current. A seizure phenomenon easily occurs in the incised portion, causing clogging of the tissue piece into the elongated depressed portion 21 and the like, making stable and sufficient bipolar electrocoagulation and incision operation difficult. Usage is not preferable.
[0012]
As shown in FIGS. 11 to 15, the cross-sectional shape of the elongated depression 21 has various shapes such as a square shape (opened toward the air) as the surface tension varies depending on the nature of the perfusate used in the operation. Triangular, trapezoidal, semi-circular, semi-elliptical, etc. are selected, and the cross-sectional shape can be such that the cross-sectional area of the groove changes continuously or almost continuously in the length direction.
[0013]
Also, as shown in FIGS. 16 to 19, the planar shape of the elongated depression 21 has various shapes to match the properties of the perfusate used in the operation, the bipolar electrocoagulation of the arm of the tweezers, and the shape of the incision. For example, a triangle, a trapezoid, a quadrangle, a teardrop shape, or the like.
[0014]
Regarding the structure of the arm of the tweezers with the perfusion tube, the tip of the arm of the tweezers is one in which the perfusion tube is entirely or partially embedded inside the arm as previously proposed (Patent 2530413). Is provided with a groove-like channel as a perfusate guiding means from the opening of the perfusion tube toward the tip of the arm (Japanese Patent Application No. 8-325837), bipolar electrocoagulation at the tip of the arm, and 24 carat gold on the entire incision. (Japanese Patent Laid-Open No. 7-27525) has been proposed, but by combining these conventional inventions and the present invention, a living tissue or a part of a blood vessel has a bipolar structure on the side of the arm tip, particularly on the side without a perfusion tube. It is possible to maximize the effect of preventing electrocoagulation and seizure phenomenon adhering to the incision.
[0015]
When the structure shown in the present invention is used, when the arm is sandwiched with the tweezers, the perfusate is supplied to the arm on which the perfusion tube is arranged, and both arms do not come into full contact due to the surface tension of the perfusate. In both cases, the perfusate can be moved to the long and narrow depression at the other arm tip, and by holding the perfusate in the depression, the living tissue etc. that has been cauterized at the arm tip without the perfusion tube can be obtained. Bipolar electrocoagulation at the arm tip and adhesion to the incision can be prevented. This makes it possible to perform stable and effective electric surgery for a long time at the bipolar electrocoagulation and incision at the tip of each arm when energizing a high-frequency current.
[0016]
A usage example of the tweezers and each device according to one embodiment of the present invention will be described with reference to a connection layout diagram of FIG. The bipolar electrocoagulation and incision tweezers 1 is configured to transmit a high-frequency current generated by the high-frequency generator 16 through a bipolar cord 17. In addition, a perfusion solution such as physiological saline is sent from the perfusion solution source 18 to the perfusion control device 20 through the infusion tube 19, and is connected to flow to the perfusion tube in the bipolar tweezers 1 while controlling the flow rate.
[0017]
[Comparative Examples and Examples]
As comparative examples, the following three types of surgical tweezers were prepared. As tweezers A, there is no perfusion tube as shown in FIG. 5 and there is a conventional tweezers (Codman (trademark) No. 80-1550 titanium alloy) without an elongated depression at the tip of the arm of the tweezers, and tweezers B is shown in FIG. A perfusion-type tweezers (Johnson & Johnson Medical Co., Ltd. product number 80-9000 titanium alloy) without an elongated depression at the tip of the arm of the tweezers and a perfusion tube on one arm as shown in FIG. A tweezer without a slender depression at the tip of the arm of one tweezers by providing a groove-like flow path as a perfusate guiding means between the tip opening of the perfusion tube and the bipolar electrocoagulation and incision at the tip of the arm Prepared. In order to show the examples of the present invention, the following three types of surgical tweezers were prepared. In other words, a perfusion tube is arranged on one arm as tweezers D, and bipolar electrocoagulation at the tip of the arm not provided with the other perfusion tube, and an elongated depression as a means for holding a perfusate from about 2.00 mm from the end of the incision The section 21 is arranged, and the planar shape of the long and narrow depression is a quadrilateral shape with a length of about 16.0 mm, a width of 0.50 mm, and a depth of 0.1 to 1.50 mm. A tweezers D (FIG. 8) having a structure in which the cross-sectional area is continuously changed in the length direction and provided with the elongated depressions, and a tweezers E as a tweezers E is provided with a perfusion tube on one arm, and a distal end opening of the perfusion tube A groove-like flow path as a perfusate guiding means is provided between the electrode and the bipolar electrocoagulation and incision at the tip of the arm, and an elongated depression similar to tweezers D is provided inside the tip of the arm where the other perfusion tube is not disposed. Tweezers (Fig. 9) Six tweezers for bipolar electrocoagulation and incision with different structures of tweezers F (FIG. 10) each having tweezers of the same shape as set E and tweezers F (FIG. 10) with 24 carat gold attached to the incision are prepared. An infusion tube (Codman Illusion Tubing Set Part No. 80-1165) for connecting the source to the bipolar electrocoagulation and incision tweezers and a perfusate control device (Codman Maris (TM) Irrigation Module for supplying an appropriate amount of perfusate) No. 80-1169) is arranged in the middle of the perfusion tube, and the outflow of the perfusate is controlled to about 20 cc / min. Also, the coagulation mode is set by the high frequency generator (Codman CMC- (trademark) No. 80-1170). Bipolar cord (Codman (trademark) Bipo It was configured to be transmitted to bipolar electrocoagulation and incision tweezers according to Raccord part number 80-1536).
[0018]
It is not used in cases of cerebral aneurysms, etc., where the tissue is scarcely cauterized in the actual neurosurgical microscope operation, but is used when approaching the lesion site, especially in the removal of primary brain tumor (glioma) where the tissue is easily cauterized Then, the above-mentioned three types of conventional bipolar electrocoagulation and incision tweezers (tweezers A to C) were compared with the bipolar electrocoagulation and incision tweezers D, tweezers E and tweezers F according to the embodiment of the present invention. The tweezers were used for 20 minutes each time, and each bipolar electrocoagulation and incision tweezer was performed three times and averaged. The following table shows the bipolar electrocoagulation at the tip of the tweezers arm, the average number of times of wiping the incision, and the average continuous use time.
[0019]
[Table 1]
Figure 0003959158
[0020]
In an actual operation of a neurosurgical microscope, especially in the removal of a primary brain tumor (glioma) in which a living tissue is easily cauterized, conventional tweezers (AC) and tweezers (DF) according to an embodiment of the present invention are used. In comparison, the tweezers according to one embodiment of the present invention can be stably and effectively supplied with a high-frequency current, thereby confirming the usefulness of the present invention. Furthermore, bipolar electrocoagulation and incision with 24 carats of gold are attached to the tweezers according to one embodiment of the present invention (Japanese Patent Laid-Open No. 7-27525), and the perfusion tube tip opening and bipolar electrocoagulation and Further usefulness of the present invention was confirmed by combining a groove-like channel as perfusate guiding means (Japanese Patent Application No. 8-325837) between the tip of the incision.
[0021]
【The invention's effect】
As described above, according to the surgical tweezers according to the present invention, a perfusion tube is arranged on one arm, and an elongated depression is provided on the inner side of the arm tip where no perfusion tube facing this arm is arranged. With a simple configuration, a stable and effective electric operation can be performed mainly in a neurosurgical microscope operation.
[0022]
Further, even in continuous use at the time of operation, the perfusate flows smoothly, and the work of wiping away biological tissue that has been cauterized at the incision by bipolar electrocoagulation at the tip of the arm of the tweezers during operation is reduced. As a result, since the work of exchanging tweezers can be prevented, the operation time can be greatly shortened, thereby reducing the burden on not only the patient but also the operator and the assistant.
[Brief description of the drawings]
FIG. 1 is a plan view of tweezers according to an embodiment of the present invention.
FIG. 2 is a view showing an inner surface of an arm on a side where a perfusion tube of tweezers according to one embodiment of the present invention is arranged, and an enlarged view of a tip portion thereof.
FIG. 3 is a view showing an inner surface of an arm on a side where a perfusion tube of tweezers according to an embodiment of the present invention is not arranged, and an enlarged view of a tip portion thereof.
FIG. 4 is a connection layout diagram of tweezers and devices according to an embodiment of the present invention.
FIG. 5 is a plan view of bipolar electrocoagulation and incision at the tip of an arm of conventional tweezers A (without perfusion).
FIG. 6 is a plan view of bipolar electrocoagulation and incision at the tip of an arm of conventional tweezers B (perfusion type).
FIG. 7 is a plan view of bipolar electrocoagulation and incision at the arm tip of conventional tweezers C (perfusion type and having a groove at the tip of the perfusion tube).
FIG. 8 is a plan view of bipolar electrocoagulation and incision at the arm tip of tweezers D according to one embodiment of the present invention.
FIG. 9 is a plan view of bipolar electrocoagulation and incision at the arm tip of tweezers E according to one embodiment of the present invention.
FIG. 10 is a plan view of bipolar electrocoagulation and incision at the arm tip of tweezers F according to one embodiment of the present invention.
FIG. 11 is a cross-sectional view of a long and narrow depression at the tip of the tweezers according to one embodiment of the present invention.
FIG. 12 is a cross-sectional view of an elongated depression at the tip of a tweezers according to one embodiment of the present invention.
FIG. 13 is a cross-sectional view of a long and narrow depression at the tip of the tweezers according to one embodiment of the present invention.
FIG. 14 is a cross-sectional view of an elongated depression at the tip of a tweezers according to an embodiment of the present invention.
FIG. 15 is a cross-sectional view of a long and narrow depression at the tip of the tweezers according to one embodiment of the present invention.
FIG. 16 is a plan view of an elongated depression at the tip of the tweezers according to one embodiment of the present invention.
FIG. 17 is a plan view of an elongated depression at the tip of the tweezers according to one embodiment of the present invention.
FIG. 18 is a plan view of an elongated depression at the tip of the tweezers according to one embodiment of the present invention.
FIG. 19 is a plan view of an elongated depression at the tip of the tweezers according to one embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Main body 2 Arm 3 Arm 2a Surface part 3a Surface part 4 Grip part 5 Grip part 6 Electrode 7 Electrode 8 Housing part 9 Bipolar electrocoagulation and incision part 10 of arm tip Bipolar electrocoagulation and incision part 10a of arm tip Bipolar of arm tip Electrocoagulation and incision end 10b Bipolar electrocoagulation at arm tip and elongate depression tip 11 of groove Incision 12 Perfusion tube 13 Perfusion connection port 14 Adhesive 15 Grooved channel 16 High frequency generator 17 Bipolar cord 18 Perfusion fluid source 19 Infusion tube 20 Perfusion control device 21 Elongated depression 22 Gold plating part

Claims (4)

高周波発生電源装置に接続する相互に絶縁された双極の電極と、常時は、先端部が開放状態を維持するよう付勢されている2本の腕と、該2本の腕の先端部に相互に向かい合うように配置された双極電気凝固及び切開部が設けられており、該双極電気凝固及び切開部が該双極の電極にそれぞれ電気的に接続させている双極電気凝固及び切開用ピンセットにおいて、該2本の腕の一方のみに潅流管と該潅流管の潅流液排出口を具備し、他方の腕のみの、腕の先端部である該双極電気凝固及び切開部に細長い陥没部が設けられていることを特徴とする手術用ピンセット。  Mutually insulated bipolar electrodes connected to the high-frequency generating power supply, two arms that are normally biased so that the tip is kept open, and the tips of the two arms In bipolar electrocoagulation and incision tweezers provided with a bipolar electrocoagulation and incision arranged to face each other, the bipolar electrocoagulation and incision being electrically connected to the electrodes of the bipolar respectively Only one of the two arms has a perfusion tube and a perfusate outlet for the perfusion tube, and the bipolar electrocoagulation and incision at the tip of the arm of only the other arm is provided with an elongated depression. Surgical tweezers characterized by 該細長い陥没部が双極電気凝固及び切開部に通じるように設けられていることを特徴とする請求項1の手術用ピンセット。  The surgical tweezer according to claim 1, wherein the elongated depression is provided so as to communicate with bipolar electrocoagulation and incision. 該細長い陥没部が絶縁された腕の部分から双極電気凝固及び切開部に通じるように設けられていることを特徴とする請求項1の手術用ピンセット。  The surgical tweezer according to claim 1, wherein the elongated depression is provided so as to lead to bipolar electrocoagulation and incision from an insulated arm portion. 該細長い陥没部が絶縁された腕の部分から双極電気凝固及び切開部に通じるように設けられているが、該細長い陥没部が双極電気凝固及び切開部の先部までは至しないことを特徴とする請求項1の手術用ピンセット。  The elongated depression is provided so as to lead from the insulated arm portion to the bipolar electrocoagulation and incision, but the elongated depression does not reach the tip of the bipolar electrocoagulation and incision. The surgical tweezers according to claim 1.
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JP2001061857A (en) * 1999-08-31 2001-03-13 Tokai Rika Co Ltd Perfusion liquid supply device for bipolar electric tweezers
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