JP3580895B2 - Induction cautery equipment - Google Patents

Induction cautery equipment Download PDF

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JP3580895B2
JP3580895B2 JP09270695A JP9270695A JP3580895B2 JP 3580895 B2 JP3580895 B2 JP 3580895B2 JP 09270695 A JP09270695 A JP 09270695A JP 9270695 A JP9270695 A JP 9270695A JP 3580895 B2 JP3580895 B2 JP 3580895B2
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return electrode
electrode plate
counter electrode
monitor
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JPH08280706A (en
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友尚 櫻井
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Olympus Corp
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【０００１】
【産業上の利用分野】
本発明は、外科手術や内視鏡下処置等に利用される高周波焼灼装置、いわゆる電気メス装置に関する。
【０００２】
【従来の技術】
電気メスの出力方式の１つであるモノポーラ方式はメス先から出される高周波電流を、対極板と呼ばれる広い面積をもった電極で回収する構成になっている。対極板は通常、患者の太腿部や臀部の体表面に装着され、ケーブルによって電気メス装置に接続される。また、対極板で高周波電流が正しく回収できない状態が発生すると、意図しない部位での熱傷を引き起こす虞があるので、これを回避するようモニター回路が装備されている。
【０００３】
電気メス用の対極板には大きく分けて２つの種類が存在する。その１つは図１（ａ）で示すように、１枚のシート１に１枚の電極２を設けて成る単極タイプの対極板３であり、この対極板３は電極２に２本のコード４を接続し、それらによりループを形成する。
もう１つのタイプは図１（ｂ）で示すように、１枚のシート５に間隔を置いて２枚以上の電極６を配置して１枚のシート状に構成された分割タイプの対極板７であり、各電極５には別々のコード８が接続され、各電極６を患者に装着することで患者の体表面を含むループを形成する。
【０００４】
対極板が正しく装着しているかを検知するモニター回路は従来からこれら２つのタイプの対極板にそれぞれ対応した方式が存在する。つまり、単極タイプの対極板用モニター回路は２本のコード４と電極２から成るループに微小の電圧を印加し、電流が流れるかどうかでループの連続性を検知し、これによりコード４の断線や電気メス装置との接続不良の有無を判断する。
また、分割タイプの対極板用モニター回路は各電極６間に直流または交流の微小電流を流して、各電極６間の抵抗またはインピーダンスを検出し、対極板７の患者への接触状態を判断するものである。
【０００５】
そこで、従来の電気メス装置は前述した２種類のタイプの対極板３，７が使えるようにするために、分割タイプの対極板用モニター回路を単極タイプでも便宜的に利用可能になし、使用する対極板３，７の種類によって切り換えて機能させていた。例えば、電気メス装置に接続するコネクターの形状を異ならせてその種類を判別して行ったり（特開昭６４−７６８４６号公報参照）、ユーザーが選択スイッチを押したりする方法があった。
【０００６】
【発明が解決しようとする課題】
対極板のタイプを判別するため、対極板のコネクタの形状を変え、その種類を検出するようにすると、その接続部分の構造が複雑化してしまい、コストアップに繋がる。また、使用する対極板のタイプをユーザーに選択させる方法では操作ミスにつながる虞れがあるため、必ずしも望ましいものではない。
【０００７】
本発明は前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単極タイプの対極板と分割タイプの対極板とを使用するにあたり、それら対極板のタイプを容易かつ確実に判断してモニター回路を動作させ、より安全性を高めた高周波焼灼装置を提供することにある。
【０００８】
【課題を解決するための手段】
請求項１に係る発明は、１つの対極板に２本のコードを接続した第１の対極板ユニットと、
一対の対極板に対して、各々の対極板にコードをそれぞれ接続した第２の対極板ユニットと、前記第１の対極板ユニットに通電するための第１のプラグと、前記第２の対極板ユニットに通電するための前記第１のプラグと同形式の第２のプラグとがそれぞれ接続可能なコネクタと、直流電流を用いて、前記端子間の導通を検出する第１の検出手段と、交流電流を用いて、前記端子間の導通を検出する第２の検出手段と、前記第１の検出手段および第２の検出手段の検出結果により、前記コネクタに接続された対極板ユニットの種類を判別する判別手段と、前記判別手段の判別結果に基づいて前記コネクタに接続された対極板ユニットに供給する高周波電流を制御する制御手段とを備えたことを特徴とする高周波焼灼装置である。
請求項２に係る発明は、第１の検出手段による対極板の検出の際に用いる直流電流と、第２の検出手段による対極板の検出の際に用いる交流電流との干渉を防止する手段を備えることを特徴とする請求項１に記載の高周波焼灼装置である。
請求項３に係る発明は、第１の検出手段と第２の検出手段の動作を時分割して動作させる制御手段を備えることを特徴とする請求項１または請求項２に記載の高周波焼灼装置である。
【０００９】
【実施例】
以下、図面を参照して、本発明の一実施例を説明する。図２は電気メス装置の基本的な構成を概略的に示す。図２において、１０は電気メス本体、１１は電気メスハンドピース、１２は対極板である。電気メス本体１０には、高周波電流発生回路１３、絶縁のための出力トランス１４、低周波阻止（カット）用コンデンサ１５、対極板モニター１６、アクティブコネクタ１７、対極板コネクタ１８、表示手段１９および制御手段２０が設けられている。
【００１０】
そして、前記高周波電流発生回路１３で、切開や凝固機能を発揮するための高周波電流を発生し、出力トランス１４で絶縁及び昇圧を行う。その出力はアクティブ側と対極板側とに分けられ、感電を防止するための低周波阻止用コンデンサ１５を経由して各コネクタ１７，１８に導かれる。アクティブコネクタ１７には術者が操作するハンドピース１１が接続される。ハンドピース１１の先端電極から出力される高周波電流が患者の術部に集中的に与えられることにより術部の切開や凝固が行われる。
【００１１】
一方、対極板コネクタ１８には患者に装着された対極板１２が接続され、ハンドピース１１側から出された高周波電流を広い面積で回収する。さらに、対極板コネクタ１８に接続された対極板１２の状態を対極板モニター１６で監視する。その結果、対極板１２の状態が異常であると、高周波電流発生回路１３に出力禁止信号を送ったり、表示手段１９に異常信号を送り異常表示を行ったりする。これらの動作は制御手段２０によって制御される。
【００１２】
次に、図３を参照して、前記対極板モニター１６の構成を具体的に示す。ここで図２と同様のものについてはその説明を省略する。対極板モニター１６は大きく２つの構成部分に分かれている。すなわち、単極対極板モニター部２１の部分と分割対極板モニター部２２の部分から成る。まず、単極対極板モニター部２１は、独立電源２３、フォトカプラ２４、ローパスフィルタ２５、及びこれらを制御して導通を検出する導通検知手段２６を備える。対極板コネクタ１８の端子、独立電源２３、フォトカプラ２４の発光ダイオード及びローパスフィルタ２５は直列に接続されて閉ループ回路を形成している。そして、フォトカプラ２４の受光素子の出力が導通検知手段２６に入力される。
【００１３】
一方、分割対極板モニター部２２は直流を阻止する手段の直流阻止コンデンサ２７、パルストランス２８、及びこれらを制御してパルストランス２８を介したインピーダンスの大きさを検出するインピーダンス検出手段２９を備える。 単極対極板モニター部２１と分割対極板モニター部２２はいずれも前記対極板コネクタ１８に接続されている。
【００１４】
この対極板コネクタ１８に接続される前記対極板１２としては図１（ａ）で説明したものと同様な単極タイプ対極板１２ａと、図１（ｂ）で説明したものと同様な分割タイプ対極板１２ｂとの２種類のタイプのものが用意されている。また、単極タイプ対極板１２ａのプラグ３１と分割タイプ対極板１２ｂのプラグ３２は同形式で共通タイプのものが用いられ、前記電気メス本体１０の同じ対極板コネクタ１８に対して接続できるようになっている。
【００１５】
この電気メス装置に単極タイプの対極板１２ａを使用する場合には、そのプラグ３１を対極板コネクタ１８に接続する。この接続がなされると、独立電源２３から直流電流ｉｄｃが発生し、ローパスフィルタ２５を介して、対極板１２ａのコードを通り帰還するループができる。このため、フォトカプラ２４が動作してその信号を導通検知手段２６へ伝える。導通検知手段２６は、単極タイプの対極板１２ａが正しく接続されたこと、或いはコードの断線などがないことの判断を行う。その結果が制御回路２０に伝えられ、所望の動作を行うことになる。
【００１６】
一方、電気メス装置に分割タイプの対極板１２ｂを使用する場合には、そのプラグ３２を対極板コネクタ１８に接続する。この接続がなされると、インピーダンス検出手段２９の動作によりパルストランス２８の２次側から微小の交流電源ｉａｃが発生し、直流阻止コンデンサ２７を介して対極板１２ｂのコードを通り、この分割タイプ対極板１２ｂが患者に装着されたときのインピーダンスＺを含むループができる。これによりその装着インピーダンスＺの大きさを表す信号がパルストランス２８の１次側に現れ、インピーダンス検出手段２９に伝えられ、その結果、分割タイプの対極板１２ｂが患者に正しく装着されたこと、或いはコードの断線などがないことが判断される。その結果が制御回路２０に伝えられ、所望の動作を行うことになる。ここで、ローパスフィルタ２５と直流阻止コンデンサ２７はお互いの検出用電流（ｉａｃ、ｉｄｃ）の干渉を防止する機能を発揮する。
【００１７】
次に、前記構成によって対極板１２をモニターする手順の第１の例を、図４に示すフローに沿って説明する。図示しないスイッチ等により電源がオンされると、単極タイプの対極板モニター部２１と分割タイプの対極板モニター部２２が起動する。単極タイプのモニター部２１として導通検知手段２６の結果が『ＯＫ』であれば、電気メスの出力が許可される。導通検知手段２６の結果が『ＮＧ』である場合、分割タイプのモニターとしてインピーダンス検知手段２９の結果が『ＯＫ』であれば電気メスの出力が許可される。そのインピーダンス検知手段２９の結果が『ＮＧ』であると、もはや対極板１２は正常な状態にないと判断され、電気メスの出力は禁止され、また警告表示等を行う。この方法であれば、各対極板１２ａ，１２ｂのモニターを常に行うことができる。
【００１８】
次に、前記構成によって対極板１２をモニターする手順の第２の例を、図５に示すフローに沿って説明する。電源がオンされると、まず、単極タイプの対極板モニター部２１を起動する。この単極タイプのモニターとしての導通検知手段２６の結果が『ＯＫ』であれば電気メスの出力が許可され、また、その結果が『ＮＧ』の場合も含めて単極タイプの対極板モニター部２１の動作を停止する。
【００１９】
この後に、分割タイプの対極板モニター２２を起動する。この分割タイプのモニターとして、インピーダンス検知手段２９の結果が『ＯＫ』であれば、電気メスの出力は許可される。また『ＮＧ』の場合、もはや対極板１２は正常状態にないと判断され、電気メスの出力は禁止され、また警告表示を行い、分割タイプの対極板モニター２２の動作を停止させる。この方法であれば、お互いのモニター部２１，２２が時分割的に作動するため、相互の干渉をなくすことができる。
【００２０】
なお、本発明では以上述べたような手順に限らず、各モニターを必要に応じて機能させて対極板１２の状態を監視することが可能である。
［付記］前述した構成によれば、少なくとも以下のような事項が得られる。
１−１ ．単極タイプの対極板と分割タイプの対極板とを使用する高周波焼灼装置において、
単極タイプの対極板および分割タイプの対極板を接続する対極板接続手段と、
単極タイプの対極板の装着状態のモニターを直流電圧で行うモニター手段と、
分割タイプの対極板の装着状態のモニターを交流電圧で行うモニター手段と、
前記両モニター手段を動作させて接続した対極板の装着状態を検出する手段とを具備し、各タイプの対極板の状態の検出を同時に監視することを特徴とする高周波焼灼装置。
１−２ ．単極タイプの対極板の装着状態のモニターを直流電圧で行うモニター手段はローパスフィルタを介して対極板接続手段に接続され、分割タイプの対極板の装着状態のモニターを交流電圧で行う第２のモニター手段は直流阻止手段を介して前記対極板接続手段に接続したことを特徴とする付記１−１ 項に記載の高周波焼灼装置。
【００２１】
２−１ ．単極タイプの対極板と分割タイプの対極板とを使用する高周波焼灼装置において、
単極タイプの対極板および分割タイプの対極板を接続する対極板接続手段と、
単極タイプの対極板の装着状態のモニターを例えば直流電圧で行うモニター手段と、
分割タイプの対極板の装着状態のモニターを例えば交流電圧で行うモニター手段と、
前記両モニター手段を時分割で動作させて接続した対極板の装着状態を検出する手段とを具備し、各タイプの対極板の装着状態の検出をある時間は１方のモニター手段を機能させ、ある時間は他方のモニター手段を機能させてそれぞれの各対極板の装着状態を独立に監視することを特徴とする高周波焼灼装置。
３−１ ．単極タイプの対極板と分割タイプの対極板とを使用する高周波焼灼装置において、
単極タイプの対極板と分割タイプの対極板の各コネクタをそれぞれ接続可能な共通の対極板接続手段を設け、単極タイプの対極板の装着状態のモニターを直流電圧で行うモニター手段と、分割タイプの対極板の装着状態のモニターを交流電圧で行うモニター手段とを有し、前記各モニター手段は前記対極板接続手段に接続され、前記両モニター手段を動作させて接続した対極板の装着状態を検出し、どちらも異常であることを判断すると電気メスの出力を禁止する制御手段を具備し、各タイプの対極板の装着状態の検出を監視することを特徴とする高周波焼灼装置。
【００２２】
【発明の効果】
以上説明したように本発明によれば、単極タイプの対極板と分割タイプの対極板を使用できるにも拘らず、各対極板の種別を判別する手段を特別に設けることなく、各タイプに応じたモニターを行うことができ、それら対極板の状態を容易かつ確実に判断して装置の安全性がより向上するという効果が得られる。
【図面の簡単な説明】
【図１】（ａ）は単極タイプの対極板の構成図、（ｂ）は分割タイプの対極板の構成図。
【図２】本発明の一実施例の電気メス装置の基本的な構成を概略的に示す説明図。
【図３】同じく前記電気メス装置の対極板モニターの構成を具体的に示す説明図。
【図４】同じく対極板をモニターする一例の手順のフローチャート。
【図５】同じく対極板をモニターする他の例の手順のフローチャート。
【符号の説明】
１０…電気メス本体、１１…電気メスハンドピース、１２…対極板、１２ａ…単極タイプ対極板、１２ｂ…分割タイプ対極板、１３…高周波電流発生回路、１４…出力トランス、１５…低周波カット用コンデンサ、１６…対極板モニター、１７…アクティブコネクタ、１８…対極板コネクタ、１９…表示手段、２０…制御手段２０、２１…単極対極板モニター部、２２…分割対極板モニター部、２３…独立電源、２４…フォトカプラ、２５…ローパスフィルタ、２６…導通検知手段、２７…直流阻止コンデンサ、２８…パルストランス、２９…インピーダンス検出手段。[0001]
[Industrial applications]
The present invention relates to a high-frequency ablation device used for a surgical operation, an endoscopic treatment, and the like, that is, a so-called electric scalpel device.
[0002]
[Prior art]
The monopolar system, which is one of the output systems of an electric scalpel, has a configuration in which a high-frequency current output from a scalpel is collected by an electrode having a large area called a counter electrode. The return electrode is usually attached to the body surface of the patient's thighs and buttocks and connected to the electrocautery device by a cable. Further, if a state in which the high-frequency current cannot be collected correctly by the return electrode plate occurs, a burn may be caused in an unintended part. Therefore, a monitor circuit is provided to avoid this.
[0003]
There are roughly two types of return electrode plates for electric scalpels. As shown in FIG. 1A, one of them is a monopolar type counter electrode plate 3 in which one sheet 2 is provided with one electrode 2, and this counter electrode plate 3 has two electrodes 2. Connect the cords 4 and form a loop with them.
As shown in FIG. 1 (b), the other type is a split type counter electrode plate 7 which is formed in one sheet by arranging two or more electrodes 6 on one sheet 5 at intervals. A separate cord 8 is connected to each electrode 5, and a loop including the body surface of the patient is formed by attaching each electrode 6 to the patient.
[0004]
Conventionally, a monitor circuit for detecting whether or not the counter electrode is correctly mounted has a method corresponding to each of these two types of counter electrodes. In other words, the monitor circuit for the counter electrode plate of the single pole type applies a minute voltage to the loop composed of the two cords 4 and the electrodes 2 and detects the continuity of the loop by checking whether or not a current flows. It is determined whether there is a disconnection or a poor connection with the electrosurgical device.
Further, the split type return electrode monitor circuit supplies a small DC or AC current between the electrodes 6 to detect the resistance or impedance between the electrodes 6 to determine the contact state of the return electrode 7 with the patient. Things.
[0005]
Therefore, in order to use the two types of the return electrodes 3 and 7 described above, the conventional electrosurgical apparatus does not allow the split-type return electrode monitor circuit to be conveniently used even for a single-pole type. The function is switched by the type of the return electrode plates 3 and 7. For example, there has been a method in which the shape of a connector to be connected to the electrocautery device is made different to determine the type (see JP-A-64-76846), or a user presses a selection switch.
[0006]
[Problems to be solved by the invention]
If the shape of the connector of the return electrode plate is changed to detect the type in order to determine the type of the return electrode plate, the structure of the connection portion becomes complicated, leading to an increase in cost. Further, the method of allowing the user to select the type of the return electrode plate to be used is not always desirable because it may lead to an operation error.
[0007]
The present invention has been made in view of the above-mentioned problems, and an object thereof is to use a single-pole type return electrode plate and a split type return electrode plate, and easily and reliably determine the types of the return electrode plates. Another object of the present invention is to provide a high-frequency ablation apparatus which operates a monitor circuit to improve safety.
[0008]
[Means for Solving the Problems]
The invention according to claim 1 includes a first return electrode unit in which two cords are connected to one return electrode plate,
A second counter electrode unit in which a cord is connected to each of the counter electrode plates, a first plug for energizing the first counter electrode unit, and the second counter electrode plate A connector to which the first plug for supplying power to the unit and a second plug of the same type can be respectively connected; a first detecting means for detecting conduction between the terminals using a direct current; A second detecting means for detecting conduction between the terminals using current, and a type of the return electrode unit connected to the connector is determined based on detection results of the first and second detecting means. A high-frequency ablation apparatus, comprising: a determination unit that performs high-frequency current supplied to a return electrode unit connected to the connector based on a determination result of the determination unit.
According to a second aspect of the present invention, there is provided means for preventing interference between a direct current used for detecting the return electrode by the first detecting means and an alternating current used for detecting the return electrode by the second detecting means. The high-frequency ablation device according to claim 1, further comprising:
The invention according to claim 3 is provided with control means for operating the first detecting means and the second detecting means in a time-sharing manner, and the high-frequency ablation apparatus according to claim 1 or 2. It is.
[0009]
【Example】
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 2 schematically shows a basic configuration of the electrocautery device. In FIG. 2, reference numeral 10 denotes an electric knife main body, 11 denotes an electric knife handpiece, and 12 denotes a counter electrode plate. The electric scalpel body 10 includes a high-frequency current generating circuit 13, an output transformer 14 for insulation, a low-frequency blocking (cut) capacitor 15, a counter electrode monitor 16, an active connector 17, a counter electrode connector 18, a display means 19, and a control unit. Means 20 are provided.
[0010]
Then, the high-frequency current generating circuit 13 generates a high-frequency current for performing the incision and coagulation functions, and the output transformer 14 performs insulation and boosting. The output is divided into the active side and the counter electrode side, and is led to the connectors 17 and 18 via the low frequency blocking capacitor 15 for preventing electric shock. The handpiece 11 operated by the operator is connected to the active connector 17. The high-frequency current output from the tip electrode of the handpiece 11 is intensively applied to the operative site of the patient, whereby incision and coagulation of the operative site are performed.
[0011]
On the other hand, the return electrode connector 18 is connected to the return electrode 12 attached to the patient, and collects a high-frequency current output from the handpiece 11 over a wide area. Further, the state of the return electrode 12 connected to the return electrode connector 18 is monitored by the return electrode monitor 16. As a result, when the state of the return electrode plate 12 is abnormal, an output prohibition signal is sent to the high-frequency current generating circuit 13 or an abnormal signal is sent to the display means 19 to display an abnormality. These operations are controlled by the control means 20.
[0012]
Next, the configuration of the return electrode monitor 16 will be specifically described with reference to FIG. Here, the description of the same components as those in FIG. 2 is omitted. The return electrode monitor 16 is roughly divided into two components. That is, it comprises a portion of the unipolar counter electrode monitor 21 and a portion of the divided counter electrode monitor 22. First, the single-pole / counterplate monitor unit 21 includes an independent power supply 23, a photocoupler 24, a low-pass filter 25, and a conduction detecting unit 26 that controls these to detect conduction. The terminal of the counter electrode connector 18, the independent power supply 23, the light emitting diode of the photocoupler 24, and the low-pass filter 25 are connected in series to form a closed loop circuit. Then, the output of the light receiving element of the photocoupler 24 is input to the conduction detecting means 26.
[0013]
On the other hand, the divided return electrode plate monitor section 22 includes a DC blocking capacitor 27 as a means for blocking DC, a pulse transformer 28, and an impedance detecting means 29 for controlling these and detecting the magnitude of impedance through the pulse transformer 28. Both the unipolar counter electrode monitor section 21 and the divided counter electrode monitor section 22 are connected to the counter electrode connector 18.
[0014]
The counter electrode plate 12 connected to the counter electrode connector 18 is a single-pole type counter electrode plate 12a similar to that described with reference to FIG. 1A, and a split type counter electrode plate similar to that described with reference to FIG. 1B. Two types of plates 12b are prepared. The plug 31 of the unipolar type counter electrode plate 12a and the plug 32 of the split type counter electrode plate 12b are of the same type and are of a common type so that they can be connected to the same counter electrode plate connector 18 of the electric knife body 10. Has become.
[0015]
When a single-pole type counter electrode plate 12a is used in this electrosurgical device, the plug 31 is connected to the counter electrode plate connector 18. When this connection is made, a DC current idc is generated from the independent power supply 23, and a loop is formed through the low-pass filter 25 to return through the cord of the return electrode plate 12a. Therefore, the photocoupler 24 operates to transmit the signal to the conduction detecting means 26. The conduction detecting means 26 determines that the single-pole type counter electrode plate 12a is correctly connected or that there is no disconnection of the cord. The result is transmitted to the control circuit 20 to perform a desired operation.
[0016]
On the other hand, when the split type counter electrode plate 12 b is used for the electric scalpel device, the plug 32 is connected to the counter electrode plate connector 18. When this connection is made, a minute AC power supply iac is generated from the secondary side of the pulse transformer 28 by the operation of the impedance detecting means 29, passes through the cord of the return electrode plate 12b via the DC blocking capacitor 27, and A loop is created containing the impedance Z when the plate 12b is worn on the patient. As a result, a signal representing the magnitude of the mounting impedance Z appears on the primary side of the pulse transformer 28 and is transmitted to the impedance detecting means 29. As a result, the split type return electrode plate 12b is correctly mounted on the patient, or It is determined that there is no break in the cord. The result is transmitted to the control circuit 20 to perform a desired operation. Here, the low-pass filter 25 and the DC blocking capacitor 27 exhibit a function of preventing interference between the detection currents (iac, idc).
[0017]
Next, a first example of a procedure for monitoring the return electrode plate 12 with the above configuration will be described with reference to the flow chart shown in FIG. When the power is turned on by a switch (not shown) or the like, the single-pole type return electrode monitor 21 and the split-type return electrode monitor 22 are activated. If the result of the conduction detecting means 26 as the single pole type monitor unit 21 is "OK", the output of the electric knife is permitted. If the result of the continuity detecting means 26 is "NG", the output of the electric knife is permitted if the result of the impedance detecting means 29 is "OK" as a split type monitor. If the result of the impedance detecting means 29 is "NG", it is determined that the return electrode plate 12 is no longer in a normal state, the output of the electric knife is prohibited, and a warning is displayed. With this method, it is possible to constantly monitor each of the return electrode plates 12a and 12b.
[0018]
Next, a second example of the procedure for monitoring the return electrode plate 12 with the above configuration will be described with reference to the flow chart shown in FIG. When the power is turned on, first, the single-pole type counter electrode monitor 21 is activated. If the result of the continuity detecting means 26 as this single-pole type monitor is "OK", the output of the electric knife is permitted, and the single-pole type counter electrode monitor section also includes the case where the result is "NG". The operation of 21 is stopped.
[0019]
Thereafter, the split type return electrode monitor 22 is activated. As a monitor of this split type, if the result of the impedance detecting means 29 is "OK", the output of the electric scalpel is permitted. In the case of "NG", it is determined that the return electrode 12 is no longer in a normal state, the output of the electric knife is prohibited, a warning is displayed, and the operation of the split-type return electrode monitor 22 is stopped. According to this method, the mutual monitoring units 21 and 22 operate in a time-sharing manner, so that mutual interference can be eliminated.
[0020]
In the present invention, it is possible to monitor the state of the return electrode plate 12 by making each monitor function as required, without being limited to the procedure described above.
[Appendix] According to the above-described configuration, at least the following items can be obtained.
1-1. In a high-frequency ablation device using a unipolar type return electrode plate and a split type return electrode plate,
Counter electrode connecting means for connecting a single-pole type counter electrode and a split type counter electrode,
Monitor means for monitoring the mounting state of the unipolar type return electrode plate with a DC voltage,
Monitor means for monitoring the mounting state of the split type return electrode plate with an AC voltage,
Means for detecting the state of attachment of the return electrode connected by operating both of the monitor means, and simultaneously monitoring the detection of the state of each type of return electrode.
1-2. The monitoring means for monitoring the mounting state of the single-pole type return electrode plate with a DC voltage is connected to the return electrode connecting means via a low-pass filter, and the second means for monitoring the mounting state of the split type return electrode plate with an AC voltage. The high-frequency ablation device according to claim 1-1, wherein the monitor means is connected to the counter electrode connecting means via a DC blocking means.
[0021]
2-1. In a high-frequency ablation device using a unipolar type return electrode plate and a split type return electrode plate,
Counter electrode connecting means for connecting a single-pole type counter electrode and a split type counter electrode,
Monitor means for monitoring the mounting state of the unipolar type return electrode plate, for example, by a DC voltage,
Monitor means for monitoring the mounting state of the split type return electrode plate with, for example, an AC voltage,
Means for detecting the mounting state of the return electrode connected by operating the two monitor means in a time-sharing manner, one of the monitor means to function for a certain time to detect the mounting state of each type of return electrode, A high frequency ablation apparatus characterized in that the other monitor means is operated for a certain time to independently monitor the mounting state of each return electrode.
3-1. In a high-frequency ablation device using a unipolar type return electrode plate and a split type return electrode plate
Provide a common counter electrode connection means capable of connecting each connector of the single-pole type return electrode plate and the connector of the split type return electrode plate, respectively, a monitor means for monitoring the mounting state of the single-pole type return electrode plate with a DC voltage, and a splitter Monitoring means for monitoring the mounting state of the counter electrode of the type with an AC voltage, wherein each of the monitoring means is connected to the counter electrode connecting means, and the mounting state of the counter electrode connected by operating both the monitoring means. A high-frequency ablation apparatus, comprising: control means for prohibiting the output of the electric scalpel when both are detected to be abnormal, and monitoring the detection of the mounting state of each type of return electrode plate.
[0022]
【The invention's effect】
As described above, according to the present invention, it is possible to use a single-pole type return electrode plate and a split-type return electrode plate, but without specially providing a means for determining the type of each return electrode, to each type. Monitoring can be performed in accordance with the situation, and the effect that the state of the return electrode plate is easily and reliably determined to further improve the safety of the apparatus can be obtained.
[Brief description of the drawings]
1A is a configuration diagram of a single-pole type return electrode plate, and FIG. 1B is a configuration diagram of a split-type return electrode plate.
FIG. 2 is an explanatory view schematically showing a basic configuration of an electrosurgical apparatus according to one embodiment of the present invention.
FIG. 3 is an explanatory diagram specifically showing a configuration of a counter electrode monitor of the electric scalpel device.
FIG. 4 is a flowchart of an example of a procedure for monitoring a return electrode plate.
FIG. 5 is a flowchart of a procedure of another example of monitoring the return electrode.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Electric knife main body, 11 ... Electric knife handpiece, 12 ... Counter electrode plate, 12a ... Single electrode type counter electrode plate, 12b ... Division type counter electrode plate, 13 ... High frequency current generation circuit, 14 ... Output transformer, 15 ... Low frequency cut Capacitor for use, 16 ... Counter electrode monitor, 17 ... Active connector, 18 ... Counter electrode connector, 19 ... Display means, 20 ... Control means 20, 21 ... Single pole counter electrode monitor section, 22 ... Split counter electrode monitor section, 23 ... Independent power supply, 24 photocoupler, 25 low-pass filter, 26 conduction detection means, 27 DC blocking capacitor, 28 pulse transformer, 29 impedance detection means.

Claims (3)

１つの対極板に２本のコードを接続した第１の対極板ユニットと、
一対の対極板に対して、各々の対極板にコードをそれぞれ接続した第２の対極板ユニットと、
前記第１の対極板ユニットに通電するための第１のプラグと、前記第２の対極板ユニットに通電するための前記第１のプラグと同形式の第２のプラグとがそれぞれ接続可能なコネクタと、
直流電流を用いて、前記端子間の導通を検出する第１の検出手段と、
交流電流を用いて、前記端子間の導通を検出する第２の検出手段と、
前記第１の検出手段および第２の検出手段の検出結果により、前記コネクタに接続された対極板ユニットの種類を判別する判別手段と、
前記判別手段の判別結果に基づいて前記コネクタに接続された対極板ユニットに供給する高周波電流を制御する制御手段と
を備えたことを特徴とする高周波焼灼装置。A first return electrode unit in which two cords are connected to one return electrode plate;
For a pair of counter electrode plates, a second counter electrode unit in which a cord is connected to each counter electrode plate,
A connector to which a first plug for supplying electricity to the first return electrode unit and a second plug of the same type as the first plug for supplying electricity to the second return electrode unit can be connected. When,
First detection means for detecting conduction between the terminals using a direct current;
Second detecting means for detecting conduction between the terminals using an alternating current;
Determining means for determining the type of the return electrode unit connected to the connector based on the detection results of the first detecting means and the second detecting means;
Control means for controlling a high-frequency current supplied to the return electrode unit connected to the connector based on a result of the determination by the determination means. 第１の検出手段による対極板の検出の際に用いる直流電流と、第２の検出手段による対極板の検出の際に用いる交流電流との干渉を防止する手段を備えることを特徴とする請求項１に記載の高周波焼灼装置。2. The apparatus according to claim 1, further comprising means for preventing interference between a direct current used for detecting the return electrode by the first detecting means and an alternating current used for detecting the return electrode by the second detecting means. 2. The high-frequency ablation device according to 1. 第１の検出手段と第２の検出手段の動作を時分割して動作させる制御手段を備えることを特徴とする請求項１または請求項２に記載の高周波焼灼装置。The high-frequency ablation device according to claim 1 or 2, further comprising a control unit that operates the first detection unit and the second detection unit in a time-sharing manner.
JP09270695A 1995-04-18 1995-04-18 Induction cautery equipment Expired - Fee Related JP3580895B2 (en)

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