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DE7418576U - Catheter with a loop that can be put under tension - Google Patents

Catheter with a loop that can be put under tension

Info

Publication number
DE7418576U
DE7418576U DE19747418576 DE7418576U DE7418576U DE 7418576 U DE7418576 U DE 7418576U DE 19747418576 DE19747418576 DE 19747418576 DE 7418576 U DE7418576 U DE 7418576U DE 7418576 U DE7418576 U DE 7418576U
Authority
DE
Germany
Prior art keywords
loop
catheter
isolated
conductors
catheter according
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.)
Expired
Application number
DE19747418576
Other languages
German (de)
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.)
Richard Wolf GmbH
Original Assignee
Richard Wolf GmbH
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 Richard Wolf GmbH filed Critical Richard Wolf GmbH
Priority to DE19747418576 priority Critical patent/DE7418576U/en
Publication of DE7418576U publication Critical patent/DE7418576U/en
Priority to GB2165175A priority patent/GB1490585A/en
Priority to FR7516856A priority patent/FR2275226A1/en
Expired legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/32—Surgical cutting instruments
    • A61B17/3205—Excision instruments
    • A61B17/32056—Surgical snare instruments
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
    • A61B18/08—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by means of electrically-heated probes
    • A61B18/10—Power sources therefor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
    • A61B18/12—Surgical 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
    • A61B18/14—Probes or electrodes therefor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
    • A61B18/12—Surgical 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
    • A61B18/14—Probes or electrodes therefor
    • A61B18/1402—Probes for open surgery
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
    • A61B18/12—Surgical 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
    • A61B18/14—Probes or electrodes therefor
    • A61B18/1492—Probes or electrodes therefor having a flexible, catheter-like structure, e.g. for heart ablation
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B2018/00636—Sensing and controlling the application of energy
    • A61B2018/00642—Sensing and controlling the application of energy with feedback, i.e. closed loop control
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
    • A61B18/12—Surgical 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
    • A61B18/14—Probes or electrodes therefor
    • A61B2018/1405—Electrodes having a specific shape
    • A61B2018/1407—Loop
    • A61B2018/141—Snare

Landscapes

  • Health & Medical Sciences (AREA)
  • Surgery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (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)
  • Otolaryngology (AREA)
  • Plasma & Fusion (AREA)
  • Physics & Mathematics (AREA)
  • Surgical Instruments (AREA)

Abstract

1490585 Cauteries; surgical cutting, devices RICHARD WOLF GmbH 20 May 1975 [30 May 1974] 21651/75 Heading A5R A device for removing, dividing or coagulating tissue, comprises two electrical conductors 2, 3 extending through an insulating sheath 4 and connectible proximally to a source of H.F. current, said conductors continuing distally to form electrode members having mutually spaced, insulation-free parts 8, and the distal ends of the electrode members being held together at a distance from one another in an insulating member 7. Sheath 4 may be flexible.

Description

Patentanwilto ,- Patent attorney , - Dr. HuEo Wilcken . . , 2 9. Μβί J974 )Dr. Hu E o Wilcken. . , 2 9. Μβί J974)

Dipl.-lng. Thomas Wilcken '::.... _yDipl.-lng. Thomas Wilcken ':: .... _y

Dipl.-Chem. Dr. Wolfgang Läufer . . ' .., ' :Dipl.-Chem. Dr. Wolfgang runner. . '..,':

24 Lübeck, Breite Siiaüo 55-54.24 Lübeck, width Siiaüo 55-54.

Anmelder: Richardnfolf GmbH, 7134 Knittlingen, Pforzheimer- Str.Applicant: Richardnfolf GmbH, 7134 Knittlingen, Pforzheimer- Str.

Katheter mit an eine Spannung legbarer SchlingeCatheter with a loop that can be put under tension

Die Neuerung bezieht sich auf einen Katheter mit zum Abtragen, Durchtrennen oder Koagulieren von Geweben dienender, an eine Spannung legbarer Schlinge.The innovation relates to a catheter with used for ablating, cutting or coagulating tissue, to a tension attachable loop.

Zum Abtragen von Geweben,ζ.B.Polypen, Riesenfalten oder Erhebungen im Magen unter Verwendung eines flexiblen oder teilflexiblen Gastroskops oder zum Durchtrennen oder Koagulieren von Geweben unter Benutzung entsprechender Endoskope werden mit Hochfrequenzstrom gespeiste Schlingen verwendet, die mit einem durch einen Katheter geführten Leiter an den einen Pol einer Stromquelle angeschlossen werden, während die Operationsstelle entweder über den Körper des Patienten und eine an den Körper gelegte Metallplatte oder der Endoskopschaft als Zuleiter zum anderen Pol der Sbromquelle dient. Bei diesen bekannten Ausführungen können unkontrollierbare Stromübergänge im Körper des Patienten auftreten, die unter Umständen sehr gefährlich sind.For removing tissues, e.g. polyps, giant folds or Elevations in the stomach using a flexible or partially flexible gastroscope or for severing or Tissue coagulation using appropriate endoscopes, loops fed with high frequency current are used, which are connected to one pole of a power source with a conductor passed through a catheter, while the surgical site is either over the patient's body and one to the Metal plate placed on the body or the endoscope shaft serves as a supply line to the other pole of the Sbromquelle. With these known designs, uncontrollable current transitions can occur in the patient's body, which under certain circumstances are very dangerous.

Die Aufgabe der Neuerung besteht darin, solche unkontrollierbaren Stromübergänge auszuschalten, und dies wird nach derThe task of the innovation is to switch off such uncontrollable current transitions, and this will be done after the

Neuerung bei dem eingangs erwähnten Katheter dadurch gelöst, daß die Schlinge in zwei Leiter übergeht, die isoliert durch den Katheter zum proximalen Katheterende geführt sind.Innovation in the catheter mentioned at the outset is achieved in that the loop merges into two conductors that insulate are passed through the catheter to the proximal end of the catheter.

Bei dieser Lösung der Neuerung kann die z.B. aus Federstahldraht bestehende Schlinge mit Schwachstrom z.B. bis zu 6 Volt so beheizt werden, daß sie eine maximale Temperatur von 170° C annimmt, wobei das Schiingenmaterial mindestens am distalen Abschnitt der Schlinge auch so gewählt werden kann, daß sich der spezifische Widerstand bei Temperaturerhöhung nach einer linearen Funktion vergrößert, was zur Temperaturregelung benutzt werden kann. Als Material ist dabei z.B- eine Nickel-Eisenlegierung mit.etwa 70 % Nickel und 30 % Eisen verwendbar. With this solution of the innovation, the loop made of spring steel wire, for example, can be used with a low current of up to 6 volts are heated so that it assumes a maximum temperature of 170 ° C, the loop material at least at the distal section of the loop can also be selected so that the specific resistance increases with an increase in temperature enlarged according to a linear function, which can be used for temperature control. The material here is, for example, a Nickel-iron alloy with about 70% nickel and 30% iron can be used.

Anstelle von Schwachstrom ist auch die Verwendung eines bipolaren Hochfrequenzstromes möglich, wobei dann das distale Ende der Schlinge durch Trennung unterbrochen ist und die Enden isoliert in einem Isolierstück zusammengefaßt sind.Instead of weak current, it is also possible to use a bipolar high-frequency current, the distal current then being used The end of the loop is interrupted by separation and the ends are isolated together in an insulating piece.

Durch die Neuerung werden unkontrollierbare Stromübergänge im Körper des Patienten völlig ausgeschaltet, da beide. Leiter der Schlinge zu den beiden Polen der Stromquelle isoliert durch den Katheter geführt sind.The innovation completely eliminates uncontrollable current transitions in the patient's body, since both. Head of the loop to the two poles of the power source are isolated through the catheter.

Die Neuerung wird anhand der Zeichnung kurz erläutert. Es zeigen:The innovation is briefly explained using the drawing. Show it:

Figur 1 eine Seitenansicht eines Katheters mit Abtragschlinge und einen teilweisen Längsschnitt durch das distale Ende des Katheters,FIG. 1 shows a side view of a catheter with an ablation loop and a partial longitudinal section through the distal end of the catheter,

Figur 2 eine Seitenansicht eines distalen Katheters mit abgeänderter Abtragschlinge, und Schnitt durch das distale Schlingenende.FIG. 2 shows a side view of a distal catheter with a modified ablation loop, and a section through the distal end of the loop.

Nach dem Beispiel Figur 1 geht die freie, z.B. aus Federstahl-· draht bestehende Schlinge 1 zum Abtragen, Durchtrennen oder Koagulieren von Geweben in Körperhöhlen in zwei Leiter 2 und 3 über, die isoliert durch den vorteilhaft flexiblen Katheter 4 zum proximalen Ende des Katheters verlaufen und proximal in Stecker 5, 6 enden, mit denen die beiden Leiter 2, 3 der Schlinge 1 an eine Stromquelle anschließbar sind. Als ,Stromquelle wird in diesem Fall vorteilhaft eine Schwachstromquelle verwendet, die z.B. eine Spannung bis zu 6 Volt liefert und in der Lage ist, die Schlinge 1 maximal bis auf eine Temperatur von 170° C aufzuheizen.According to the example in FIG. 1, the free loop 1, for example made of spring steel wire, for removing, cutting or coagulating tissues in body cavities merges into two conductors 2 and 3, which run isolated through the advantageously flexible catheter 4 to the proximal end of the catheter and end proximally in plugs 5, 6 with which the two conductors 2, 3 of the loop 1 can be connected to a power source. In this case, the power source used is advantageously a low-power source which, for example, supplies a voltage of up to 6 volts and is capable of heating the loop 1 to a maximum temperature of 170.degree.

Der Katheter 4 mit der Schlinge 1 wird z.B. mittels eines flexiblen oder teilfelxiblen Gastroskops oder eines sonstigen Endoskops an die abzutragenden, zu durchtrennenden oder zu koagulierenden Gewebe·, wie Polypen, Riesenfalten oder ErhebungenThe catheter 4 with the loop 1 is e.g. Endoscope to the tissue to be ablated, severed or coagulated, such as polyps, giant folds or bumps

-A--A-

herangeführt und dann an die Stromquelle angeschlossen, so daß uas Abtragen, Durchtrennen oder Koagulieren von Geweben ohne Gefahr für den Patienten durchführbar ist, da durch den isolierten Verlauf beider Leiter durch den Katheter keine unkontrollierbaren Ströme im Körper des Patienten auftreten können.brought up and then connected to the power source, so that uas removal, cutting or coagulation of tissues without Risk to the patient is feasible, since the insulated path of both conductors through the catheter means that there are no uncontrollable conductors Currents can occur in the patient's body.

Es ist auch möglich, die Schlinge gemäß Figur 2 mit bipolarem Hochfrequenzstrom zu beschicken, wobei die Schlinge S jedoch am distalen Ende durch Trennung unterteilt ist. Die Schlingenenden sind dabei gegeneinander isoliert in einem Isolierkörper zusammengefaßt. Sonst verlaufen die Leiter 2, 3 zur Schlinge β entsprechend Figur 1 wieder isoliert durch den Katheter 4 zum proximalen Ende und können hier an eine Hochfrequenzstromquelle angeschlossen werden. Auch in diesem Fall können kei.ie Gefahren für den Patienten auftreten.It is also possible to charge the loop according to FIG. 2 with bipolar high-frequency current, the loop S, however, being subdivided at the distal end. The loop ends are isolated from one another and combined in an insulating body. Otherwise the conductors 2, 3 run to the loop β in accordance with FIG. 1, again isolated through the catheter 4 to the proximal end and can be connected here to a high-frequency power source. In this case, too, there are no dangers for the patient.

Claims (5)

P.itenlnnwälle Dr. Huro Wiloken 29, Mal Iriß. Thomas Wilcken Difjl.-Chom. Dr. Wolfgang Laufer ,", I : "*) 24 Lüback, Broiie Slralie 6S-&4 .!!"''.,.' Anmelder: Richard Wolf £:ubH,'' 71O4' Knittlingen, Pforzheimer Str. AnsprücheP.itenlnnwwall Dr. Huro Wiloken 29, Mal Iriß. Thomas Wilcken Difjl.-Chom. Dr. Wolfgang Laufer, ", I:" *) 24 Lüback, Broiie Slralie 6S- & 4. !! "''.,. ' Applicant: Richard Wolf £: ubH, '' 71O4 'Knittlingen, Pforzheimer Str. Claims 1. Katheter mit zum Abtragen, Durchtrennen oder Koagulieren von Geweben dienender/ an eine Spannung legbarer Schlinge, dadurch gekennzeichnet, daß die Schlinge (1, S) in zwei Leiter (2, 3) übergeht, die isoliert durch den Katheter (4) zum proximalen Katheterende geführt sind.1. Catheter with for the ablation, severing or coagulation of tissues serving / to a tension placeable loop, characterized in that the loop (1, S ) merges into two conductors (2, 3) isolated by the catheter (4) for proximal end of the catheter are guided. 2. Katheter nach Anspruch 1, dadurch gekennzeichnet, daß die Schlinge (g) bei Beschickung mit bipolarem Hochfrequenzstrom am distalen Ende unterbrochen ist und die Enden gegeneinander isoliert in einem Isolierstück (7) zusammengefaßt sind.2. Catheter according to claim 1, characterized in that the loop (g) when charged with bipolar high-frequency current is interrupted at the distal end and the ends are isolated from one another and combined in an insulating piece (7) are. 3. Katheter nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Schlinge (1, δ) und die einen flexiblen Katheter (4) durchlaufenden, isolierten Leiter (2, 3) aus einem Federstahldraht hergestellt sind.3. Catheter according to claim 1 or 2, characterized in that the loop (1, δ) and the one flexible catheter (4) continuous, insulated conductor (2, 3) are made from a spring steel wire. 4. Katheter nach Anspruch 1 oder 2, dadurch gekennzeichnet,4. Catheter according to claim 1 or 2, characterized in that daß mindestens der distale Abschnitt der Schlinge (1,£) aus einem Material hergestellt ist, welches seinen spezifischen Widerstandthat at least the distal portion of the loop (1, £) from a Material is made, which is its specific resistance bei Temperaturerhöhung nach einer linearen Funktion vergrößert.when the temperature rises, it is increased according to a linear function. 5. Katheter nach Anspruch 4, dadurch gekennzeichnet, daß das Schiingenmaterial aus einer Nickel-Eisenlegierung mit 70 % Nickel und 30 % Eisengehalt besteht.5. Catheter according to claim 4, characterized in that the Loop material made from a nickel-iron alloy with 70% nickel and 30% iron content.
DE19747418576 1974-05-30 1974-05-30 Catheter with a loop that can be put under tension Expired DE7418576U (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE19747418576 DE7418576U (en) 1974-05-30 1974-05-30 Catheter with a loop that can be put under tension
GB2165175A GB1490585A (en) 1974-05-30 1975-05-20 Devices for removing dividing or coagulating tissues
FR7516856A FR2275226A1 (en) 1974-05-30 1975-05-29 CATHETER INCLUDING A LOOP THAT CAN BE ELECTRICALLY POWERED

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19747418576 DE7418576U (en) 1974-05-30 1974-05-30 Catheter with a loop that can be put under tension

Publications (1)

Publication Number Publication Date
DE7418576U true DE7418576U (en) 1974-09-12

Family

ID=6645195

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19747418576 Expired DE7418576U (en) 1974-05-30 1974-05-30 Catheter with a loop that can be put under tension

Country Status (3)

Country Link
DE (1) DE7418576U (en)
FR (1) FR2275226A1 (en)
GB (1) GB1490585A (en)

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DE102009012431A1 (en) 2009-03-10 2010-09-23 Farin, Günter, Dipl.-Ing. Method and device for operating an HF surgical device
DE102009036158A1 (en) 2009-07-28 2011-02-03 Farin, Günter, Dipl.-Ing. Monopolar polypectomy loops

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Cited By (4)

* Cited by examiner, † Cited by third party
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DE3220940A1 (en) * 1982-06-03 1983-12-08 Harald 7200 Tuttlingen Maslanka Diathermy instrument
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US9668801B2 (en) 2009-03-10 2017-06-06 Karl Storz Gmbh & Co. Kg Method and device for operating an RF surgical assembly
DE102009036158A1 (en) 2009-07-28 2011-02-03 Farin, Günter, Dipl.-Ing. Monopolar polypectomy loops

Also Published As

Publication number Publication date
GB1490585A (en) 1977-11-02
FR2275226A1 (en) 1976-01-16
FR2275226B3 (en) 1978-12-29

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