DE4212053C1 - Metal surgical instrument for HF or laser surgery - Google Patents
Metal surgical instrument for HF or laser surgeryInfo
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- 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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- 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
- A61B18/18—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves
- A61B18/20—Surgical 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
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- 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
- A61B18/1442—Probes having pivoting end effectors, e.g. forceps
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- C—CHEMISTRY; METALLURGY
- C23—COATING 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
- C23C—COATING 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
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
- C23C14/0676—Oxynitrides
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- C—CHEMISTRY; METALLURGY
- C23—COATING 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
- C23C—COATING 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
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/22—Chemical 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
- C23C16/30—Deposition of compounds, mixtures or solid solutions, e.g. borides, carbides, nitrides
- C23C16/308—Oxynitrides
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- C—CHEMISTRY; METALLURGY
- C23—COATING 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
- C23C—COATING 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
- C23C28/00—Coating 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
- C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
- C23C28/32—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer
- C23C28/321—Coatings 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
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- C—CHEMISTRY; METALLURGY
- C23—COATING 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
- C23C—COATING 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
- C23C28/00—Coating 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
- C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
- C23C28/32—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer
- C23C28/322—Coatings 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
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- C—CHEMISTRY; METALLURGY
- C23—COATING 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
- C23C—COATING 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
- C23C28/00—Coating 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
- C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
- C23C28/34—Coatings 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
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- 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
- A61B2018/00571—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body for achieving a particular surgical effect
- A61B2018/00589—Coagulation
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- 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
- A61B2018/00571—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body for achieving a particular surgical effect
- A61B2018/00601—Cutting
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- 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
- A61B18/1442—Probes having pivoting end effectors, e.g. forceps
- A61B2018/1462—Tweezers
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- Chemical Kinetics & Catalysis (AREA)
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- Life Sciences & Earth Sciences (AREA)
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- Animal Behavior & Ethology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
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- General Health & Medical Sciences (AREA)
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- Optics & Photonics (AREA)
- Electromagnetism (AREA)
- General Chemical & Material Sciences (AREA)
- Surgical Instruments (AREA)
- Laser Surgery Devices (AREA)
Abstract
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 coagulation of biological Ge weave, especially for cauterization, high frequency surgery or laser surgery, with a tissue adherence or their components in thermal cutting and / or Koagu preventive 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. Dieser unerwünschte Nebeneffekt wird vermutlich durch Glukose verursacht, welche durch thermische Denaturierung der in biologischen Geweben mehr oder weniger enthaltenen Kollagene entsteht.The sticking or even burning of biological tissue or their components during thermal cutting and / or Ko agulation processes on the surface of the used surgical instruments has been a well known pro for many years blem. This undesirable side effect is believed to be caused by Glucose caused by thermal denaturation of the in biological tissues contain more or less collagens arises.
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, they are Manufacturers of such instruments have long sought to remedy the situation create.
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). 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.A well-known proposal to avoid biolo adherence genetic tissue or its components on the surface of Cutting electrodes during cutting operations consist of the Cutting electrode with such a thin layer of PTFE coat that on the one hand the adherence of tissue or its Components avoided, on the other hand electrical conductivity Sufficiently preserved between cutting electrode and tissue remains (U.S. Patent 4,876,110). This can cause difficulties to be avoided with known coatings for electrosurgical instruments have appeared (U.S. Patents 4,314,559, 4,333,467, 4 161 950 and 4 481 057), whereby however due to the during Cutting processes using HF current inevitable electri electric arc, this thin PTFE burns away relatively quickly, which is why cutting electrodes coated in this way only for one or at most in a limited number of operations that 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). 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. Außerdem ist eine geeignete sterile Wasserversorgung erforderlich.Another known way to avoid sticking biological tissue or its components, in particular the Coagulates to the coagulation electrode during coagulation Purpose of hemostasis is during Koagu lation process a layer of water between the coagulati on the electrode and the tissue to be coagulated (H.-D. Reidenbach, high frequency and laser technology in medi zin, page 148 ff., Springer-Verlag, Berlin Heidelberg New York, 1983). This method is complex in that it does this special coagulation electrodes are required, which min at least one channel for the instillation of sterile water between the Coagulation electrode and the tissue to be coagulated. A suitable sterile water supply is also 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). Die erhoffte Anti hafteigenschaft hat sich jedoch nicht bestätigt.It is also known in bipolar surgery gripping instruments for HF surgery at least the one another facing carbide barrel surfaces places (DE 34 47 156 A1). The hoped-for anti has adhesive properties 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 a surgical needle in the area of their sharp Cutting with a vacuum evaporated hard layer provided (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 type mentioned at the outset with such an adhering biolo gischer tissue or their components in thermal cutting the and / or coagulation preventing surface coating indicate that disadvantages and difficulties of the type mentioned can be largely avoided.
Diese Aufgabe wird erfindungsgemäß durch den Gegenstand des Patentanspruchs 1 gelöst. Vorteilhafte Weiterbildungen der Erfindung sind Gegenstand der Unteransprüche.This object is achieved by the subject of claim 1 solved. Advantageous further developments of Invention are the subject of the dependent claims.
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. 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. Das Metall kann auch ein Element der dritten Hauptgruppe des Periodensystems der Elemente sein. Als Metalloide eignen sich Stickstoff, Kohlenstoff, Sauer stoff und Bor.Surgical instruments according to the invention are used Avoiding biological tissue and / or their sticking Fabric components on their surface at least in the area Chen which with biological Ge weave and / or their tissue components come into contact can, with a hard material layer, consists of metal-metal loid connections, coated. Suitable hard material layer ten contain metals of the fourth to eighth subgroups such as Titanium, zirconium, niobium, tantalum, tungsten, molybdenum or other of these subgroups of the Periodic Table of the Ele ment. The metal can also be an element of the third Main group of the Periodic Table of the Elements. As Metalloids are suitable for nitrogen, carbon and acid fabric and boron.
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 is the fact that in Contrary to a very thin coating of the surface of Cutting and / or coagulation instruments with PTFE an Be Layering made of metallic hard material is much more resistant against electric arcs 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. Vorzugsweise finden Dünnschichtverfahren Verwendung, bei denen eine physikalische (PVD-Verfahren) oder eine chemische (CVD-Verfahren) Aufdampfung erfolgt. Vorzugs weise werden Schichtdicken der Hartstoffbeschichtung zwischen 0,05 Mikrometer und 15 Mikrometer vorgesehen, so daß eine ko stensparende Herstellung möglich ist.Hard material layers of the type of interest can be with the help known methods on the surface of surgical instruments, for example on high frequency coagulation electrodes surgery, cutting electrodes for high frequency surgery, Coagulation electrodes for laser surgery or electrocautery, be applied. Thin film processes are preferred Use where a physical (PVD process) or chemical (CVD) evaporation takes place. Preferential wise layer thicknesses of the hard material coating between 0.05 microns and 15 microns are provided so that a ko most economical 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.One for the coating of surgical instruments for thermi rule cutting and / or coagulating preferred metallic Hard material has the formulation (TiNb) ON, being 41 atomic percent Titanium, 19 atomic percent niobium, 31 atomic percent 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. Die Edelmetallschicht kann eine Dicke zwischen 0,01 und 3 Mikrometer aufweisen. Unter bestimm ten Voraussetzungen kann jedoch auf die Beschichtung der Hart stoffschicht mit Edelmetall verzichtet werden.For a better equipotential distribution, the surface of the Hard material layer with a layer of gold, platinum or others Precious metals are equipped. The precious metal layer can be a Thickness between 0.01 and 3 microns. Under certain However, conditions can be applied to the coating of the hard layer of precious metal can be dispensed with.
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. Diese Zwischenschicht kann eine Dicke zwischen 0,5 und 8 Mikrometer aufweisen.If the metal body of the surgical instrument is rusty Free steel is there to improve the Cor protection against corrosion between the metal body and the hard material an intermediate layer made of pure titanium or a titanium alloy tion, or from pure niobium and tantalum or alloys thereof watch. This intermediate layer can have a thickness between 0.5 and have 8 microns.
Im folgenden sollen einige Ausführungsbeispiele der Erfindung anhand von schematischen Zeichnungen näher erläutert werden. Es zeigtThe following are some embodiments of the invention be explained in more detail with reference to schematic drawings. 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; Fig. 2 is a schematic representation of a cutting electrode for high frequency electrosurgery;
Fig. 3 eine schematische Darstellung einer bipolaren Koagulati onspinzette für die Hochfrequenzchirurgie; Figure 3 is a schematic representation of a bipolar coagulation tweezers for high frequency surgery.
Fig. 4 eine schematische Darstellung einer Koagulationssonde für die Laser-Chirurgie; Fig. 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. Die Koagulationselektrode 1 besteht aus nicht rosten dem Edelstahl. Die Hartstoffschicht 2 besteht aus einer Metall- Metalloid-Verbindung oder aus einer Mischung verschiedener Metall-Metalloid-Verbindungen. Als Metall der Metall-Metalloid- Verbindungen können Metalle der vierten bis achten Nebengrup pen des periodischen Systems der Elemente verwendet werden. Als Metalloid der Metall-Metalloid-Verbindung kann Stickstoff, Koh lenstoff und/oder Sauerstoff verwendet werden. Die Hartstoff schicht 2 besteht vorzugsweise aus einem Gesamtmetallgehalt zwi schen 30 und 70 Atomprozent und wird durch Metalloide auf 100 Atomprozent ergänzt. Die Schichtdicke beträgt vorzugsweise 0,05 Mikrometer bis 15 Mikrometer. 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. 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.In Fig. 1, a coagulation electrode 1 for high-frequency surgery is shown schematically, the surface of which is coated at least at the points where this coagulation electrode during coagulation processes with biological tissues and / or its components can come into contact with a hard material layer 2 . The coagulation electrode 1 is made of non-rusting stainless steel. The hard material layer 2 consists of a metal-metalloid compound or a mixture of different metal-metalloid compounds. Metals of the fourth to eighth subgroups of the periodic system of the elements can be used as the metal of the metal-metalloid compounds. Nitrogen, carbon and / or oxygen can be used as the metalloid of the metal-metalloid compound. The hard material layer 2 preferably consists of a total metal content between 30 and 70 atomic percent and is supplemented by metalloids to 100 atomic percent. The layer thickness is preferably 0.05 microns to 15 microns. For better equipotential distribution, the surface of the hard material layer 2 can , if necessary, be additionally coated with a thin noble metal layer 3 made of a noble metal, for example gold or platinum, it being possible for a layer thickness of this noble metal layer 3 of preferably 0.01 micrometers to 3 micrometers to be used. From case to case, it may be appropriate to apply a corrosion protection layer 4 made of pure titanium or a titanium alloy, or of pure niobium and tantalum or alloys thereof, to the surface of the coagulation electrode 1 , which consists for example of rustproof stainless steel, before a hard material coating takes place, the corrosion protection layer 4 can 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, a cutting electrode 5 for high frequency surgery is shown schematically, which consists for example of non-rusting stainless steel and whose surface in the same way as described above for the coagulation electrode 1 in Fig. 1, with a hard material layer 2 and, if necessary, additionally with a precious metal layer 3 and / or a corrosion protection layer 4 is permitted.
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 for example is made of stainless steel and whose surface at least in the areas where they may come with biological tissues and / or their components into contact in the same manner as above the coagulation electrode in FIG. 1 described, is equipped with a hard material layer 2 and, if necessary additionally 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 laser surgery is shown schematically, the laser-heated tip 8 , which consists for example of stainless steel, in the same manner as described above for the coagulation electrode 1 in Fig. 1, with a hard material layer 2 and if necessary is additionally equipped with a precious metal layer 3 and / or a corrosion protection layer 4 .
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 9 is shown schematically, the electrically heated part 10 , which is made of platinum, for example, in the same way as described above for the coagulation electrode 1 in Fig. 1, with a hard material layer Fig. 2 and if necessary additionally is equipped with a precious metal layer 3 .
Claims (9)
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DE4212053A DE4212053C1 (en) | 1992-04-10 | 1992-04-10 | Metal surgical instrument for HF or laser surgery |
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DE4212053A DE4212053C1 (en) | 1992-04-10 | 1992-04-10 | Metal surgical instrument for HF or laser surgery |
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Cited By (9)
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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 |
DE102009005459A1 (en) * | 2009-01-21 | 2010-07-22 | Koc, Felix, Dr. | Endovascular laser for introducing laser light into human or animal body, has flexible optical fiber for redirecting laser light, where laser light permeable tip is introduced at distal end of optical fiber |
DE102013006598A1 (en) * | 2013-04-17 | 2014-10-23 | Oerlikon Trading Ag, Trübbach | Coating system with ZrO₂ for electrosurgical devices |
US10512502B2 (en) | 2015-03-30 | 2019-12-24 | Erbe Elektromedizin Gmbh | Tissue scissors for biological tissue |
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Publication number | Priority date | Publication date | Assignee | Title |
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DE102013006598A1 (en) * | 2013-04-17 | 2014-10-23 | Oerlikon Trading Ag, Trübbach | Coating system with ZrO₂ for electrosurgical devices |
US9974598B2 (en) | 2013-04-17 | 2018-05-22 | Oerlikon Surface Solutions Ag, Pfäffikon | Coating system comprising ZrO2 for electrosurgical devices |
US10512502B2 (en) | 2015-03-30 | 2019-12-24 | Erbe Elektromedizin Gmbh | Tissue scissors for biological tissue |
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