DE2514501A1 - Bipolares coagulationsinstrument fuer endoskope - Google Patents

Bipolares coagulationsinstrument fuer endoskope

Info

Publication number
DE2514501A1
DE2514501A1 DE19752514501 DE2514501A DE2514501A1 DE 2514501 A1 DE2514501 A1 DE 2514501A1 DE 19752514501 DE19752514501 DE 19752514501 DE 2514501 A DE2514501 A DE 2514501A DE 2514501 A1 DE2514501 A1 DE 2514501A1
Authority
DE
Germany
Prior art keywords
electrodes
bipolar coagulation
coagulation instrument
loop
endoscopes
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
DE19752514501
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English (en)
Inventor
Karl Storz
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Individual
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Individual
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Application filed by Individual filed Critical Individual
Priority to DE19752514501 priority Critical patent/DE2514501A1/de
Publication of DE2514501A1 publication Critical patent/DE2514501A1/de
Pending legal-status Critical Current

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Classifications

    • 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
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/012Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor characterised by internal passages or accessories therefor
    • A61B1/018Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor characterised by internal passages or accessories therefor for receiving instruments
    • 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
    • A61B2018/1405Electrodes having a specific shape
    • A61B2018/1407Loop
    • A61B2018/141Snare

Landscapes

  • Health & Medical Sciences (AREA)
  • Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biomedical Technology (AREA)
  • Otolaryngology (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Plasma & Fusion (AREA)
  • Physics & Mathematics (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Surgical Instruments (AREA)

Description

  • Bipolares Coagulationsinstrument für Endoskope Die Erfindung bezieht sich auf ein bipolares Coagulationsinstrument für Endoskope zum Abtragen von Polypen z.B.
  • im Magen, Duodenum, Rektum, im Larynx oder Nasenraum, dessen Elektroden ein Hochfrequenzstrom zur Blutstillung zugeleitet wird.
  • Bei chirurgischen Operationen kommt in neuerer Zeit das bipolare Coagulieren zur Anwendung. Hierbei wird z.B.
  • jedem der beiden gegeneinander isolierten Schenkel einer Pinzette, die hier als Elektroden dienen, der Hochfrequenzstrom zugeführt. Das zwischen den Schenkeln liegende Gewebe wird coaguliert, sobald sich die Schenkel in dem erforderlichen geringen Abstand voneinander befinden.
  • Dadurch ergibt sich der Vorteil, daß durch die bipolare Arbeitsweise der Hochfrequenzstrom um ein vielfaches geringer sein kann als bei der unipolaren Technik. Es ist auch die Gefahr von Verbrennungen aus diesem Grunde beseitigt.
  • Es sind weiter unipolare Coagulations-Schlingen zum Abtragen von Polypen und dgl. bekannt (USA-PS 3 805 791), wobei sich aber der schwere Nachteil ergibt, daß das Anlegen einer inaktiven Patientin-Elektrode erforderlich ist. Hierbei muß der Strom zwischen der inaktiven Patienten-Elektrode und der aktiven Elektrode der Coagulations-Schlinge und daher durch den Körper des Patienten fließen. Dabei können u.a. unkontrollierte Nebenströme auftreten, die an ungewollten Stellen Gewebe schädigungen verursachen.
  • Der Erfindung liegt deshalb die Aufgabe zugrunde, das bipolare Coagulationsinstrument der eingangs erwähnten Art so zu verbessern, daß es bei den bekannten Schlingen der erwähnten Art Anwendung finden kann, um sich dieser wähnten großen Vorteile der bipolaren Arbeitsweise nutzbar zu machen.
  • Die Lösung dieser Aufgabe durch die Erfindung besteht darin, daß die beiden Elektroden eine Schlinge bilden, indem sie an ihren Enden mittels eines Isolierstückes miteinander verbunden sind.
  • Dadurch kann die bipolare Arbeitsweise zur Anwendung gelangen, ohne daß die eingangs erwähnten Nachteile auftreten.
  • In weiterer Ausgestaltung der Erfindung ist vorgesehen, daß die Elektroden auf ihrer ganzen Länge mit Ausnahme eines Bereiches in der Nähe des Isolierstückes mit einer Isolierschicht versehen sind. Auf diese Weise arbeitet nur der distale Bereich der Schlinge als bipolares Coagulationsinstrument, weil die beiden Schenkel im übrigen voneinander isoliert sind und somit als aktive und inaktive Elektrode wirken. Hierbei fließt der Strom nur unmittelbar zwischen den beiden Schenkeln der Schlinge und kann nur auf das von der Schlinge unter optischer Kontrolle erfaßte Gewebestück wirken. Der Strom fließt also nicht mehr durch den Körper des Patienten, und ungewollte Gewebeschäden sind ausgeschlossen.
  • Dadurch, daß bei der bevorzugten Ausführungsform der Schlingendraht nur am distalen Ende nicht isoliert und somit wirksam ist, ist ein Kontakt der beiden Elektroden auch bei zusammengezogener Schlinge verhindert. Die beiden Elektroden sind nämlich im übrigen auf ihrer gesamten Länge isoliert.
  • Hierbei kann vorteilhaft sein, daß die Elektroden nur im Bereich der einander zugewandten Hälften nicht mit der Isolierschicht versehen sind. Dadurch wird erreicht, daß eine unerwünschte Berührung selbst des distalen arbeitenden Endes der beiden Elektroden mit dem Endoskopschaft auch im zusammengezogenen Zustand vermieden ist.
  • Hierzu ist noch zweckmäßig, daß die Schlinge in das Ende eines Schaftes einschiebbar ist. Dadurch können zangenartige Bewegungen der Schlinge erzeugt werden. Um die beiden Elektroden hierbei möglichst nahe aneinander zu bringen, kann noch vorgesehen sein, daß am Ende des Schaftes eine Innenhülse angeordnet ist.
  • Schließlich ist nach einem anderen Merkmal der Erfindung auth noch zweckmäßig, daß die beiden Elektroden in ihrem der Schlinge abgewandten proximalen Bereich von einer Hülse ummantelt sind. Dadurch werden die beiden Elektroden in diesem Bereich zusammengehalten und können auch durch die Hülse gemeinsam betätigt werden.
  • Weitere Vorteile und Einzelheiten der Erfindung ergeben sich aus der nun folgenden Beschreibung eines Ausführungsbeispiels unter Hinweis auf die Zeichnung. In dieser zeigen: Fig. 1 eine teilweise geschnittene Seitenansicht auf das distale Ende des Erfindungsgegenstandes und Fig. 2 das gleiche wie Fig. 1, jedoch in der zusammengezogenen Lage.
  • In Fig. 1 sieht man den Instrumentenschaft 6, wobei es sich auch um den Endoskopschaft handeln kann, andernfalls um eine Hülse, die in einem nicht weiter dargestellten Endoskop angeordnet ist. Derartige Endoskope mit ähnlichen Instrumenten sind bereits bekannt und müssen daher nicht im einzelnen dargestellt werden.
  • In dem Schaft 6 sind zwei Elektroden 1 und 2 am distalen Ende schlingenförmig angeordnet und am distalen Ende mittels eines Isolierstückes 3 zusammengehalten, in dem die Elektroden 1 und 2 voneinander getrennt gehalten sind, so daß ein Kurzschluß nicht entstehen kann. Mittels der unterbrochenen Linien 9 und 10 ist die Lage der Elektroden innerhalb des Isolierstückes 3 getrennt voneinander angegeben.
  • Die Elektroden 1 und 2 sind nahezu über ihre gesamte Länge vollständig mit einer Isolierschicht versehen. Lediglich in der Nähe des Isolierstückes 3 ist die Isolierung an den einander zugewandten Hälften der Elektroden 1 und 2 im Bereich 4 und 5 nicht vorhanden. Wie man der Fig. 1 deutlich entnehmen kann, ist die Isolierung hier im Außenbereich 11 und 12 ebenfalls noch vorhanden, lediglich innen sind die Elektrodenhälften 4 und 5 blank, das heißt ohne die Isolierung Nur dieser Bereich bildet daher die aktiven oder arbeitenden Elektroden.
  • Die erwähnte Schlinge ist in Fig. 1 vollständig ausgefahren.
  • Sie wird innerhalb des Schaftes 6 durch die Hülse 7 zusammengedrückt, und im proximalen Bereich sind die beiden Elektroden 1 und 2 von einer weiteren Hülse 8 ummantelt, die einen sehr viel kleineren Durchmesser hat als der Schaft 6 und die beiden Elektroden zusammenhält. Diese Hülse 8 kann auch zur Betätigung, das heißt zur Verschiebung der Elektroden in Richtung des Pfeiles 13 und in Gegenrichtung dienen.
  • In Fig. 2 sind die Elektroden mittels der Hülse 8 in Richtung des Pfeiles 13 in den Schaft oder die Hülse 6 hineingezogen, so daß hierdurch die beiden distalen aktiven Enden 4 und 5 der Elektroden 1 und 2 einander genähert worden sind.
  • Sie haben dadurch eine zangenförmige Bewegung ausgeführt und dazwischen vorhandenes Gewebe oder dgl. abgetrennt.
  • Durch die Erfindung ist dabei die erwähnte Coagulations-Wirkung der aktiven Teile der Elektrode eingetreten.
  • Die Erfindung ist nicht auf die dargestellte Ausführungsform beschränkt. Sie kann sowohl bei flexiblen Schlingen, z.B. für Gastroskope, Colonoskope als auch bei starren Schlingen, z.B. für Rektoskope oder Laryngoskope Anwendung finden.

Claims (6)

  1. Ansprüche
    #.) Bipolares Coagulationsinstrument für Endoskope zum Abtragen von Polypen z.B. im Magen, Duodenum, Rektum, im Larynx oder Nasenraum, dessen Elektroden ein Hochfrequenzstrom zur Blutstillung zugeleitet wird, dadurch gekennzeichnet, faß die beiden Elektroden (1, 2) eine Schlinge bil#en, indem sie an ihren Enden mittels eines Isolierstückes (3) miteinander verbunden sind.
  2. 2. Bipolares Coagulationsinstrument nach Anspruch 1, dadurch gekennzeichnet, daß die Elektroden (1, 2) auf ihrer ganzen Länge mit Ausnahme eines Bereiches (4, 5) in der Nähe des Isolierstückes (3) mit einer Isolierschicht versehen sind.
  3. 3. Bipolares Coagulationsinstrument nach Anspruch 2, dadurch gekennzeichnet, daß die Elektroden (1, 2) nur im Bereich der einander zugewandten Hälften (4, 5) nicht mit der Isolierschicht versehen sind.
  4. 4. Bipolares Coagulationsinstrument nach Anspruch 1, dadurch gekennzeichnet, daß die Schlinge (1-3) in das Ende eines Schaftes (6) einschiebbar ist.
  5. 5. Bipolares Coagulationsinstrument nach Anspruch 4, dadurch gekennzeichnet, daß am Ende des Schaftes (6) eine Innenhülse (7) angeordnet ist.
  6. 6. Bipolares Coagulationsinstrument nach Anspruch t, dadurch gekennzeichnet, daß die beiden Elektroden (1, 2) in ihrem der Schlinge abgewandten proximalen Bereich von einer Hülse (8) ummantelt sind.
DE19752514501 1975-04-03 1975-04-03 Bipolares coagulationsinstrument fuer endoskope Pending DE2514501A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19752514501 DE2514501A1 (de) 1975-04-03 1975-04-03 Bipolares coagulationsinstrument fuer endoskope

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19752514501 DE2514501A1 (de) 1975-04-03 1975-04-03 Bipolares coagulationsinstrument fuer endoskope

Publications (1)

Publication Number Publication Date
DE2514501A1 true DE2514501A1 (de) 1976-10-21

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Cited By (391)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0044538A1 (de) * 1980-07-23 1982-01-27 Olympus Optical Co., Ltd. Endoskopisches Gerät
DE3220940A1 (de) * 1982-06-03 1983-12-08 Harald 7200 Tuttlingen Maslanka Diathermie-instrument
US4493320A (en) * 1982-04-02 1985-01-15 Treat Michael R Bipolar electrocautery surgical snare
US4503855A (en) * 1981-12-31 1985-03-12 Harald Maslanka High frequency surgical snare electrode
US4905691A (en) * 1989-04-17 1990-03-06 Everest Medical Corporation Polypectome snare with bipolar electrodes
WO1991017717A1 (en) 1990-05-11 1991-11-28 Applied Urology, Inc. Electrosurgical electrode
US5078716A (en) * 1990-05-11 1992-01-07 Doll Larry F Electrosurgical apparatus for resecting abnormal protruding growth
AU740103B2 (en) * 1997-09-30 2001-11-01 Boston Scientific Limited Apparatus for electro-surgical tissue removal
WO2009099960A1 (en) * 2008-01-31 2009-08-13 Tyco Healthcare Group, Lp Polyp removal device and method of use
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