DE4212053C1 - Metal surgical instrument for HF or laser surgery - Google Patents

Metal surgical instrument for HF or laser surgery

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Publication number
DE4212053C1
DE4212053C1 DE4212053A DE4212053A DE4212053C1 DE 4212053 C1 DE4212053 C1 DE 4212053C1 DE 4212053 A DE4212053 A DE 4212053A DE 4212053 A DE4212053 A DE 4212053A DE 4212053 C1 DE4212053 C1 DE 4212053C1
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Prior art keywords
surgical instrument
layer
metal
characterized
instrument according
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DE4212053A
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German (de)
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Guenter Farin
Klaus Fischer
Detlef Dr Repenning
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ERBE Elecktromedizin GmbH
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ERBE Elecktromedizin GmbH
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    • 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
    • A61B18/18Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves
    • A61B18/20Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser
    • 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
    • A61B18/1442Probes having pivoting end effectors, e.g. forceps
    • 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
    • A61B18/18Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves
    • A61B18/20Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser
    • A61B18/22Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser the beam being directed along or through a flexible conduit, e.g. an optical fibre; Couplings or hand-pieces therefor
    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C14/00Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
    • C23C14/06Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
    • C23C14/0676Oxynitrides
    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C16/00Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
    • C23C16/22Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of inorganic material, other than metallic material
    • C23C16/30Deposition of compounds, mixtures or solid solutions, e.g. borides, carbides, nitrides
    • C23C16/308Oxynitrides
    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C28/00Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
    • C23C28/30Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
    • C23C28/32Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer
    • C23C28/321Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer with at least one metal alloy layer
    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C28/00Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
    • C23C28/30Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
    • C23C28/32Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer
    • C23C28/322Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer only coatings of metal elements only
    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C28/00Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
    • C23C28/30Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
    • C23C28/34Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one inorganic non-metallic material layer, e.g. metal carbide, nitride, boride, silicide layer and their mixtures, enamels, phosphates and sulphates
    • 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
    • A61B2018/00571Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body for achieving a particular surgical effect
    • A61B2018/00589Coagulation
    • 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
    • A61B2018/00571Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body for achieving a particular surgical effect
    • A61B2018/00601Cutting
    • 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
    • A61B18/1442Probes having pivoting end effectors, e.g. forceps
    • A61B2018/1462Tweezers

Abstract

The metal surgical instrument (1), for thermal cutting and/or coagulation of biological tissue and especially for HF or laser surgery, has a layer of hard material (2) at least partially over its surface. The hard layer (2) material is a metal-metalloid compound, alone or in a mixture. The metal is of the fourth to eighth side groups or an element of the third main group of the periodic system of the element. The metalloid is selected from groups containing nitrogen, carbon, oxygen and boron. The hard layer (2) can be of (TiNb)ON with 41 atom% titanium, 19 atom% niobium, 31 atom% nitrogen and 9 atom% oxygen. A corrosion protection layer (4) is of pure titanium, a titanium alloy, or pure niobium and tantalum and their alloys.

Description

Die Erfindung betrifft chirurgische Instrumente aus Metall zum thermischen Schneiden und/oder Koagulieren biologischer Ge webe, insbesondere für die Kauterisation, Hochfrequenz-Chirurgie oder Laser-Chirurgie, mit einer das Anhaften von Gewebe oder deren Bestandteile beim thermischen Schneiden und/oder Koagu lieren verhindernden Oberflächenbeschichtung. The invention relates to surgical instruments made of metal for thermal cutting and / or coagulating of biological Ge tissue, particularly for cauterisation, high-frequency surgery or laser surgery with an adherence of tissue or its components during thermal cutting and / or Koagu lose preventing surface coating ,

Das Anhaften oder gar Einbrennen biologischer Gewebe oder deren Bestandteile während thermischer Schneide- und/oder Ko agulationsvorgänge an die Oberfläche der hierfür verwendeten chirurgischen Instrumente ist ein seit vielen Jahren bekanntes Pro blem. The adherence or even burning of biological tissues or their components during thermal cutting and / or co agulationsvorgänge to the surface of the surgical instruments used for this is a for many years known Pro problem. Dieser unerwünschte Nebeneffekt wird vermutlich durch Glukose verursacht, welche durch thermische Denaturierung der in biologischen Geweben mehr oder weniger enthaltenen Kollagene entsteht. This unwanted side effect is presumably caused by glucose, which is caused by thermal denaturation of the collagen, more or less contained in biological tissues.

Da dieses Problem bereits seit vielen Jahren bekannt ist, sind die Hersteller derartiger Instrumente seit langem bemüht, Abhilfe zu schaffen. Since this problem has been known for many years, the manufacturers of such instruments have long been working to remedy the situation.

Ein bekannter Vorschlag zur Vermeidung des Anhaftens biolo gischer Gewebe oder deren Bestandteile auf der Oberfläche von Schneideelektroden während Schneidevorgängen besteht darin, die Schneideelektrode mit einer derartig dünnen Schicht aus PTFE zu beschichten, daß einerseits das Anhaften von Gewebe oder deren Bestandteile vermieden, andererseits die elektrische Leitfähigkeit zwischen Schneideelektrode und Gewebe ausreichend erhalten bleibt (US-PS 4 876 110). A known approach to avoiding the adhesion biolo Gischer tissue or components thereof on the surface of cutting electrodes during cutting operations is to coat the cutting electrode having such a thin layer of PTFE, on the one hand to avoid the adherence of tissue or components thereof, on the other hand the electrical conductivity sufficiently obtained between the cutting electrode and the tissue remains (U.S. Patent No. 4,876,110). Damit können zwar Schwierigkeiten vermieden werden, die bei bekannten Beschichtungen für elektrochirurgische Instrumente auftraten (US-PS 4 314 559, 4 333 467, 4 161 950 und 4 481 057), wobei jedoch infolge der während Schneidevorgängen mittels HF-Strom unvermeidlichen elektri schen Lichtbogen diese dünne PTFE relativ schnell wegbrennt, weswegen derartig beschichtete Schneideelektroden nur für eine oder allenfalls in begrenzter Anzahl von Operationen benutzt wer den können. Thus, although difficulties may be avoided, which occurred in prior art coatings for electro-surgical instruments (US-PS 4,314,559, 4,333,467, 4,161,950 and 4,481,057), but due to the inevitable during cutting operations by means of high-frequency current electrical rule arc this thin PTFE burns away relatively quickly, which is why such a coated cutting electrodes used for one or at most a limited number of operations who can.

Eine andere bekannte Möglichkeit zur Vermeidung des Anhaftens biologischer Gewebe oder deren Bestandteile, insbesondere des Koagulates an die Koagulationselektrode bei Koagulationen zum Zwecke der Blutstillung, besteht darin, während des Koagu lationsvorganges eine Wasserschicht zwischen der Koagulati onselektrode und dem zu koagulierenden Gewebe zu instillieren (H.-D. Reidenbach, Hochfrequenz- und Lasertechnik in der Medi zin, Seite 148 ff., Springer-Verlag, Berlin Heidelberg New York, 1983). Another known possibility to prevent the adhesion of biological tissue, or components thereof, in particular of the coagulate the coagulating at coagulations for the purpose of hemostasis is that during the Koagu lationsvorganges a water layer between the Koagulati onselektrode and the tissue to be coagulated to instill (H. -D. Reidbach, radio frequency and laser technology in Medi cine, page 148 et seq., Springer-Verlag, Berlin Heidelberg New York, 1983). Diese Methode ist insofern aufwendig, als hierfür spezielle Koagulationselektroden erforderlich sind, welche minde stens einen Kanal zur Instillation sterilen Wassers zwischen die Koagulationselektrode und das zu koagulierende Gewebe haben. This method is so far complex than this specific coagulation are required which minde least have a channel for instillation of sterile water between the coagulation electrode and the tissue to be coagulated. Außerdem ist eine geeignete sterile Wasserversorgung erforderlich. In addition, an appropriate sterile water supply is required.

Es ist auch bekannt, bei bipolaren chirurgi schen Greifinstrumenten für die HF-Chirurgie zumindest die einander zugewandten Faßflächen aus Hartmetall herzu stellen (DE 34 47 156 A1). It is also known, at least near, the facing Faßflächen of hard metal in bipolar chirurgi rule gripping instruments for HF surgery filters (DE 34 47 156 A1). Die erhoffte Anti hafteigenschaft hat sich jedoch nicht bestätigt. The hoped-for anti-adhesive property, however, has not been confirmed.

Es ist ferner bekannt, eine chirurgische Nadel im Bereich ihrer scharfen Schneiden mit einer im Hochvakuum aufgedampf ten Hartstoffschicht zu versehen (DE 38 41 443 C1). It is also known to provide a surgical needle in the region of their sharp cutting edges with a vapor steam in a high vacuum th layer of hard material (DE 38 41 443 C1).

Es ist Aufgabe der Erfindung, ein chirurgisches Instrument der eingangs genannten Art mit einer derartigen, das Anhaften biolo gischer Gewebe oder deren Bestandteile beim thermischen Schnei den und/oder Koagulieren verhindernden Oberflächenbeschichtung anzugeben, daß Nachteile und Schwierigkeiten der genannten Art weitgehend vermieden werden können. It is an object of the invention to provide a surgical instrument of the type mentioned with such, the adhesion biolo Gischer tissue or components thereof during the thermal Schnei specify the and / or coagulation-preventing surface coating that disadvantages and difficulties of the mentioned type can be largely avoided.

Diese Aufgabe wird erfindungsgemäß durch den Gegenstand des Patentanspruchs 1 gelöst. This object is achieved by the subject of claim 1. Vorteilhafte Weiterbildungen der Erfindung sind Gegenstand der Unteransprüche. Advantageous developments of the invention are subject of the subclaims.

Chirurgische Instrumente entsprechend der Erfindung werden zur Vermeidung des Anhaftens biologischer Gewebe und/oder deren Gewebebestandteile auf deren Oberfläche zumindest in den Berei chen, welche während deren Anwendungen mit biologischen Ge weben und/oder deren Gewebebestandteile in Berührung kommen können, mit einer Hartstoffschicht, besteht aus Metall-Metal loid-Verbindungen, beschichtet. Surgical instruments according to the invention are surfaces to prevent the adhesion of biological tissue and / or tissue components on the surface thereof at least in the areas which weave during their applications with biological Ge and / or tissue components may come into contact with a hard material layer consists of metal-metal loid compounds coated. Hierfür geeignete Hartstoffschich ten enthalten Metalle der vierten bis achten Nebengruppen wie Titan, Zirkonium, Niob, Tantal, Wolfram, Molybdän oder andere dieser Nebengruppen des Periodensystems der Ele mente. For this purpose, suitable th Hartstoffschich contain metals of the fourth to eighth sub-groups, such as titanium, zirconium, niobium, tantalum, tungsten, molybdenum or another of these subgroups of the Periodic Table of Ele elements. Das Metall kann auch ein Element der dritten Hauptgruppe des Periodensystems der Elemente sein. The metal may also be an element of the third main group of the Periodic Table of Elements. Als Metalloide eignen sich Stickstoff, Kohlenstoff, Sauer stoff und Bor. As metalloids is nitrogen, carbon, sour material and boron are.

Ein besonderer Vorteil der Erfindung ist darin zu sehen, daß im Gegensatz zu einer sehr dünnen Beschichtung der Oberfläche von Schneide- und/oder Koagulationsinstrumenten mit PTFE eine Be schichtung aus metallischem Hartstoff wesentlich widerstandsfähi ger gegen elektrische Lichtbogen und mechanische Belastungen ist. A particular advantage of the invention lies in the fact that, in contrast to a very thin coating of the surface of cutting and / or coagulation instruments with PTFE coating a much Be widerstandsfähi ger of metallic hard material is to electrical arcing and mechanical loads.

Hartstoffschichten der interessierenden Art können mit Hilfe be kannter Verfahren auf die Oberfläche chirurgischer Instrumente, beispielsweise auf Koagulationselektroden für die Hochfrequenz chirurgie, Schneideelektroden für die Hochfrequenzchirurgie, Koagulationselektroden für die Laser-Chirurgie oder Elektrokauter, aufgebracht werden. Hard coatings of interest Art can use be known per process to the surface of surgical instruments, for example, coagulation electrodes for high-frequency surgery, cutting electrodes for high-frequency surgery, coagulation for laser surgery or electrocautery be applied. Vorzugsweise finden Dünnschichtverfahren Verwendung, bei denen eine physikalische (PVD-Verfahren) oder eine chemische (CVD-Verfahren) Aufdampfung erfolgt. Preferably, thin-film processes are used, in which a physical (PVD method) or a chemical (CVD) deposition takes place. Vorzugs weise werden Schichtdicken der Hartstoffbeschichtung zwischen 0,05 Mikrometer und 15 Mikrometer vorgesehen, so daß eine ko stensparende Herstellung möglich ist. Preference, be provided layer thicknesses of the hard coating is between 0.05 microns and 15 microns, so that a co stensparende production is possible.

Ein für die Beschichtung chirurgischer Instrumente zum thermi schen Schneiden und/oder Koagulieren bevorzugter metallischer Hartstoff hat die Formulierung (TiNb)ON, wobei 41 Atomprozent Titan, 19 Atomprozent Niob, 31 Atomprozent Stickstoff und 9 Atomprozent Sauerstoff vorgesehen sind. A rule for the coating of surgical instruments for thermi cutting and / or coagulating preferred metallic hard material having the formulation (TiNb) ON, wherein 41 atomic percent titanium, 19 atomic percent niobium, 31 atomic percent of nitrogen and 9 atomic percent oxygen are provided.

Zur besseren Äquipotentialverteilung kann die Oberfläche der Hartstoffschicht mit einer Schicht aus Gold, Platin oder anderen Eedelmetallen ausgestattet werden. For better equipotential surface of the hard material layer may be provided with a layer of gold, platinum or other Eedelmetallen. Die Edelmetallschicht kann eine Dicke zwischen 0,01 und 3 Mikrometer aufweisen. The noble metal layer may have a thickness between 0.01 and 3 micrometers. Unter bestimm ten Voraussetzungen kann jedoch auf die Beschichtung der Hart stoffschicht mit Edelmetall verzichtet werden. Under certain conditions, however, may be dispensed with noble metal material layer on the coating of the hard.

Wenn der Metallkörper des chirurgischen Instruments aus rost freiem Stahl besteht ist es zweckmäßig, zur Verbesserung des Kor rosionsschutzes zwischen dem Metallkörper und der Hartstoff schicht eine Zwischenschicht aus Reintitan oder einer Titanlegie rung, oder aus Reinniob und Tantal bzw. Legierungen davon vor zusehen. If the metal body of the surgical instrument of stainless steel, it is expedient to improve the Cor rosionsschutzes between the metal body and the hard material layer, an intermediate layer made of pure titanium or a Titanlegie tion, or watching from pure niobium and tantalum or alloys thereof before. Diese Zwischenschicht kann eine Dicke zwischen 0,5 und 8 Mikrometer aufweisen. This intermediate layer may have a thickness between 0.5 and 8 micrometers.

Im folgenden sollen einige Ausführungsbeispiele der Erfindung anhand von schematischen Zeichnungen näher erläutert werden. In the following some embodiments of the invention with reference to schematic drawings shall be explained in more detail. Es zeigt It shows

Fig. 1 eine schematische Darstellung einer Koagulationselektrode für die Hochfrequenzchirurgie; Figure 1 is a schematic representation of a coagulation electrode for high-frequency surgery.

Fig. 2 eine schematische Darstellung einer Schneideelektrode für die Hochfrequenzchirurgie; Figure 2 is a schematic illustration of a cutting electrode for high-frequency surgery.

Fig. 3 eine schematische Darstellung einer bipolaren Koagulati onspinzette für die Hochfrequenzchirurgie; Fig. 3 is a schematic representation of a bipolar Koagulati onspinzette for high frequency electrosurgery;

Fig. 4 eine schematische Darstellung einer Koagulationssonde für die Laser-Chirurgie; Figure 4 is a schematic representation of a coagulation probe for laser surgery.

Fig. 5 eine schematische Darstellung eines Kauters. Fig. 5 is a schematic representation of a cautery.

In Fig. 1 ist schematisch eine Koagulationselektrode 1 für die Hochfrequenzchirurgie dargestellt, deren Oberfläche zumindest an den Stellen, wo diese Koagulationselektrode während Koagulati onsvorgängen mit biologischen Geweben und/oder deren Bestand teile in Berührung kommen kann, mit einer Hartstoffschicht 2 be schichtet ist. In Fig. 1, a coagulation electrode 1 is shown schematically for high-frequency surgery, the surface may, at least at the locations where these coagulation during Koagulati onsvorgängen with biological tissues and / or their constituent parts in contact, is coated with a hard material layer 2 be. Die Koagulationselektrode 1 besteht aus nicht rosten dem Edelstahl. The coagulation electrode 1 consists of not rust the steel. Die Hartstoffschicht 2 besteht aus einer Metall- Metalloid-Verbindung oder aus einer Mischung verschiedener Metall-Metalloid-Verbindungen. The hard film 2 is composed of a metal metalloid compound or a mixture of different metal-metalloid compounds. Als Metall der Metall-Metalloid- Verbindungen können Metalle der vierten bis achten Nebengrup pen des periodischen Systems der Elemente verwendet werden. As the metal of the metal-metalloid compounds, metals of the fourth to eighth Nebengrup groups of the periodic system of the elements are used. Als Metalloid der Metall-Metalloid-Verbindung kann Stickstoff, Koh lenstoff und/oder Sauerstoff verwendet werden. As a metalloid of the metal-metalloid compound may nitrogen, Koh lenstoff and / or oxygen may be used. Die Hartstoff schicht 2 besteht vorzugsweise aus einem Gesamtmetallgehalt zwi schen 30 und 70 Atomprozent und wird durch Metalloide auf 100 Atomprozent ergänzt. The hard coating layer 2 preferably consists of a total metal content Zvi's 30 and 70 atomic percent and is supplemented by metalloids to 100 atomic percent. Die Schichtdicke beträgt vorzugsweise 0,05 Mikrometer bis 15 Mikrometer. The layer thickness is preferably from 0.05 microns to 15 microns. Zur besseren Äquipotentialvertei lung kann die Oberfläche der Hartstoffschicht 2 bei Bedarf zusätzlich mit einer dünnen Edelmetallschicht 3 aus einem Edelmetall, beispielsweise Gold oder Platin, beschichtet werden, wobei eine Schichtdicke dieser Edelmetallschicht 3 von vorzugsweise 0,01 Mikrometer bis 3 Mikrometer verwendet werden kann. For better Äquipotentialvertei lung, the surface of the hard coating layer 2 can also be coated if necessary with a thin noble metal layer 3 made of a noble metal such as gold or platinum, with a layer thickness of said noble metal layer 3 can be used are preferably from 0.01 micrometer to 3 micrometers. Von Fall zu Fall kann es zweckmäßig sein, auf die Oberfläche der Koagulationselektrode 1 , welche beispielsweise aus nichtrostendem Edelstahl besteht, eine Korrosionsschutzschicht 4 aus Reintitan oder einer Titanlegierung, oder aus Reinniob und Tantal bzw. Legierungen davon aufzubringen bevor eine Hartstoffbeschichtung erfolgt, wobei die Korrosionsschutzschicht 4 vorzugsweise eine Schichtdicke zwischen 0,5 Mikrometer und 8 Mikrometer haben kann. From case to case, it may be expedient to existing on the surface of the coagulation electrode 1, for example made from stainless steel, applying a corrosion protective layer 4 made of pure titanium or a titanium alloy or from pure niobium and tantalum or alloys thereof before a hard coating, whereby the corrosion protection layer 4 may preferably have a layer thickness between 0.5 microns and 8 microns.

In Fig. 2 ist schematisch eine Schneideelektrode 5 für die Hoch frequenzchirurgie dargestellt, welche beispielsweise aus nichtro stendem Edelstahl besteht und deren Oberfläche in gleicher Weise, wie oben bei der Koagulationselektrode 1 in Fig. 1 beschrieben, mit einer Hartstoffschicht 2 und bei Bedarf zusätzlich mit einer Edelmetallschicht 3 und/oder einer Korrosionsschutzschicht 4 aus gestattet ist. In FIG. 2 schematically shows a cutting electrode 5 for the high-frequency surgical shown, which consists for example of nichtro stendem stainless steel and the surface in the same manner as described above in the coagulation electrode 1 in Fig. 1, with a hard material layer 2 and, if necessary additionally with a noble metal layer 3 and / or a corrosion protective layer 4 made is allowed.

In Fig. 3 ist schematisch eine bipolare Koagulationspinzette 6 für die Hochfrequenzchirurgie dargestellt, welche beispielsweise aus nichtrostendem Edelstahl besteht und deren Oberfläche zumindest in den Bereichen, wo diese mit biologischen Geweben und/oder deren Bestandteilen in Berührung kommen kann, in gleicher Weise wie oben bei der Koagulationselektrode in Fig. 1 beschrieben, mit einer Hartstoffschicht 2 und bei Bedarf zusätzlich mit einer Edelmetallschicht 3 und/oder einer Korrosionsschutzschicht 4 aus gestattet ist. In Fig. 3 a bipolar coagulation forceps 6 is schematically shown for the high frequency surgery, which consists for example of stainless steel and whose surface at least in the areas where they may come into contact with biological tissues and / or their components, in the same manner as described above for described the coagulation electrode in FIG. 1, with a hard material layer 2 and, if necessary is additionally equipped with a noble metal layer 3 and / or a corrosion protective layer 4 made.

In Fig. 4 ist schematisch eine Koagulationssonde 7 für die Laser- Chirurgie dargestellt, deren durch Laser geheizter Tip 8 , welcher beispielsweise aus nichtrostendem Edelstahl besteht, in gleicher Weise, wie oben bei der Koagulationselektrode 1 in Fig. 1 be schrieben, mit einer Hartstoffschicht 2 und bei Bedarf zusätzlich mit einer Edelmetallschicht 3 und/oder einer Korrosionsschutz schicht 4 ausgestattet ist. In FIG. 4, a coagulation probe 7 for the laser is illustrated schematically surgery whose inscribed by laser heated tip 8 which consists for example of stainless steel, in the same manner as above in the coagulation electrode 1 in Fig. 1 be, with a hard material layer 2 is provided and in addition, with a noble metal layer 3 and / or a corrosion protective layer 4 as required.

In Fig. 5 ist schematisch ein Elektrokauter 9 dargestellt, dessen elektrisch geheizter Teil 10 , welcher beispielsweise aus Platin be steht, in gleicher Weise, wie oben bei der Koagulationselektrode 1 in Fig. 1 beschrieben, mit einer Hartstoffschicht Fig. 2 und bei Bedarf zusätzlich mit einer Edelmetallschicht 3 ausgestattet ist. In Fig. 5, an electrocautery is shown schematically 9, the electrically heated portion 10, which is be for example, platinum, in the same manner as described above in the coagulation electrode 1 in Fig. 1, in addition with a hard material layer of FIG. 2 and if necessary is equipped with a noble metal layer. 3

Claims (9)

1. Chirurgisches Instrument aus Metall zum thermischen Schneiden und/oder Koagulieren von biologischen Gewebe, insbesondere für die Hochfrequenzchirurgie oder Laserchirurgie, mit einer das An haften von Gewebe oder deren Bestandteile beim thermischen Schneiden und/oder Koagulieren verhindernden Oberflächenbe schichtung, dadurch gekennzeichnet , daß die metallische Ober fläche des Instruments ( 1, 5, 6, 7, 9 ) zumindest teilweise mit einer Hartstoffschicht ( 2 ) beschichtet ist. 1. A surgical instrument of metal for thermal cutting and / or coagulating of biological tissue, in particular for high-frequency surgery or laser surgery, with a the To adhere tissue or components thereof during the thermal cutting and / or coagulation preventing Oberflächenbe coating, characterized in that the metallic upper surface of the instrument (1, 5, 6, 7, 9) at least partly with a hard material layer (2) is coated.
2. Chirurgisches Instrument nach Anspruch 1, dadurch gekenn zeichnet, daß die Schichtdicke der Hartstoffschicht ( 2 ) zwischen 0,05 Mikrometer und 15 Mikrometer beträgt. 2. A surgical instrument according to claim 1, characterized in that the layer thickness of the hard material layer (2) between 0.05 micrometers and 15 micrometers.
3. Chirurgisches Instrument nach Anspruch 1 oder 2, dadurch ge kennzeichnet, daß die Hartstoffschicht ( 2 ) aus einer oder einer Mischung von Metall-Metalloid-Verbindungen besteht, wobei das Metall ein Metall der vierten bis achten Nebengruppen oder ein Element der dritten Hauptgruppen des periodischen Systems der Elemente ist, und das Metalloid aus der Stickstoff, Kohlenstoff, Sauerstoff und Bor enthalten den Gruppe ausgewählt ist. 3. A surgical instrument according to claim 1 or 2, characterized in that the hard material layer (2) consists of one or a mixture of metal-metalloid compounds, wherein the metal is a metal of the fourth to eighth sub-groups, or an element of the third main groups of the is the periodic table of the elements and the metalloid is selected from nitrogen, carbon, oxygen and boron containing the group is selected.
4. Chirurgisches Instrument nach Anspruch 3, dadurch gekenn zeichnet, daß der Gesamtmetallgehalt der Hartstoffschicht ( 2 ) zwi schen 30 und 70 Atomprozent beträgt, und daß die Metalloide auf 100 Atomprozent ergänzen. 4. A surgical instrument according to claim 3, characterized in that the total metal content of the hard material layer (2) is Zvi's 30 and 70 atomic percent, and that the metalloids complement to 100 atomic percent.
5. Chirurgisches Instrument nach Anspruch 4, dadurch gekenn zeichnet, daß die Hartstoffschicht ( 2 ) aus (TiNb)ON besteht, mit 41 Atomprozent Titan, 19 Atomprozent Niob, 31 Atomprozent Stickstoff und 9 Atomprozent Sauerstoff. 5. A surgical instrument according to claim 4, characterized in that the hard material layer (2) consists of (TiNb) ON, with 41 atomic percent titanium, 19 atomic percent niobium, 31 atomic percent nitrogen, and 9 atomic percent oxygen.
6. Chirurgisches Instrument nach einem der vorhergehenden An sprüche, dadurch gekennzeichnet, daß die Oberfläche der Hart stoffschicht ( 2 ) mit einer Edelmetallschicht ( 3 ) beschichtet ist. 6. Surgical instrument according to one of the preceding claims is, characterized in that the surface of the hard material layer (2) with a noble metal layer (3) coated.
7. Chirurgisches Instrument nach Anspruch 6, dadurch gekenn zeichnet, daß die Edelmetallschicht ( 3 ) eine Dicke zwischen 0,01 und 3 Mikrometer aufweist. 7. A surgical instrument according to claim 6, characterized in that the precious metal layer (3) has a thickness between 0.01 and 3 micrometers.
8. Chirurgisches Instrument nach einem der vorhergehenden An sprüche, dadurch gekennzeichnet, daß unter der Hartstoffschicht ( 2 ) auf dem aus rostfreiem Stahl bestehenden Metallkörper des Instruments ( 1, 5, 6, 7, 8, 9 ) eine Korrosionsschutzschicht ( 4 ) aus Reintitan oder einer Titanlegierung, oder aus Reinniob und Tantal bzw. Legierungen davon vorgesehen ist. 8. A surgical instrument according to any one of the preceding claims, characterized in that below the hard material layer (2) on the stainless steel metal body of the instrument (1, 5, 6, 7, 8, 9) has a corrosion protective layer (4) made of pure titanium or a titanium alloy or from pure niobium and tantalum or alloys thereof is provided.
9. Chirurgisches Instrument nach Anspruch 8, dadurch gekenn zeichnet, daß die Korrosionsschutzschicht ( 4 ) eine Dicke zwischen 0,5 und 8 Mikrometer hat. 9. A surgical instrument according to claim 8, characterized in that the corrosion protection layer (4) has a thickness between 0.5 and 8 micrometers.
DE4212053A 1992-04-10 1992-04-10 Metal surgical instrument for HF or laser surgery Expired - Fee Related DE4212053C1 (en)

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DE19652821C1 (en) * 1996-12-18 1998-04-23 Gottfried Hipp Wear and corrosion resistant low friction medical scissors
DE19811033C1 (en) * 1998-03-13 1999-08-05 Aesculap Ag & Co Kg Lightweight surgical instrument, e.g. tweezers, forceps or scissors
DE19858578A1 (en) * 1998-12-18 2000-06-29 Aesculap Ag & Co Kg Surgical instrument which does not impair viewing of the operating area, consists of a shaft and a plastic or ceramic tool.
WO2001008577A1 (en) 1999-07-30 2001-02-08 Erbe Elektromedizin Gmbh Electrode for cutting biological tissue
DE19941105A1 (en) * 1999-08-30 2001-03-29 Erbe Elektromedizin Electrode for cutting biological tissues includes active section comprising plurality of individual areas which are freely accessible from outside and are separated from one another by insulated surface regions
US6210411B1 (en) 1998-05-11 2001-04-03 Gebrueder Berchtold Gmbh & Co. High frequency surgical instrument with a fluid infeed passage
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DE102013006598A1 (en) * 2013-04-17 2014-10-23 Oerlikon Trading Ag, Trübbach Coating system with ZrO₂ for electrosurgical units

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Cited By (11)

* Cited by examiner, † Cited by third party
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DE19652821C1 (en) * 1996-12-18 1998-04-23 Gottfried Hipp Wear and corrosion resistant low friction medical scissors
DE19811033C1 (en) * 1998-03-13 1999-08-05 Aesculap Ag & Co Kg Lightweight surgical instrument, e.g. tweezers, forceps or scissors
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WO2001008577A1 (en) 1999-07-30 2001-02-08 Erbe Elektromedizin Gmbh Electrode for cutting biological tissue
DE19941105A1 (en) * 1999-08-30 2001-03-29 Erbe Elektromedizin Electrode for cutting biological tissues includes active section comprising plurality of individual areas which are freely accessible from outside and are separated from one another by insulated surface regions
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DE102013006598A1 (en) * 2013-04-17 2014-10-23 Oerlikon Trading Ag, Trübbach Coating system with ZrO₂ for electrosurgical units
US9974598B2 (en) 2013-04-17 2018-05-22 Oerlikon Surface Solutions Ag, Pfäffikon Coating system comprising ZrO2 for electrosurgical devices

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