EP2150185A1 - Surgical instrument and method for production thereof - Google Patents

Surgical instrument and method for production thereof

Info

Publication number
EP2150185A1
EP2150185A1 EP08758889A EP08758889A EP2150185A1 EP 2150185 A1 EP2150185 A1 EP 2150185A1 EP 08758889 A EP08758889 A EP 08758889A EP 08758889 A EP08758889 A EP 08758889A EP 2150185 A1 EP2150185 A1 EP 2150185A1
Authority
EP
European Patent Office
Prior art keywords
inner tube
surgical instrument
bearing surface
sliding bearing
tool
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.)
Withdrawn
Application number
EP08758889A
Other languages
German (de)
French (fr)
Inventor
Peter Koch
Marc Jakubzik
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.)
Gebrueder Brasseler GmbH and Co KG
Original Assignee
Gebrueder Brasseler GmbH and Co KG
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 Gebrueder Brasseler GmbH and Co KG filed Critical Gebrueder Brasseler GmbH and Co KG
Publication of EP2150185A1 publication Critical patent/EP2150185A1/en
Withdrawn legal-status Critical Current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, e.g. tourniquets
    • A61B17/32—Surgical cutting instruments
    • A61B17/320016—Endoscopic cutting instruments, e.g. arthroscopes, resectoscopes
    • A61B17/32002—Endoscopic cutting instruments, e.g. arthroscopes, resectoscopes with continuously rotating, oscillating or reciprocating cutting instruments
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
    • A61B17/1613—Component parts
    • A61B17/1633—Sleeves, i.e. non-rotating parts surrounding the bit shaft, e.g. the sleeve forming a single unit with the bit shaft
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B2017/00526—Methods of manufacturing
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
    • A61B2017/1602—Mills
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
    • A61B90/08—Accessories or related features not otherwise provided for
    • A61B2090/0813—Accessories designed for easy sterilising, i.e. re-usable

Definitions

  • the invention relates to a surgical instrument according to the preamble of claim 1 and a method for producing a surgical instrument.
  • the invention relates to a surgical instrument having an outer tube in which an inner tube is rotatably mounted, which is provided at its free end with a tool.
  • Such instruments are also referred to as so-called shaver blades.
  • shaver blades For the state of the art, reference is made by way of example to EP 1 006 898 B1.
  • the outer tube is rotationally fixed by means of a coupling device mounted on one drive, while being in ⁇ enrohr rotated with a relatively high speed of up to 12,000 rpm "1
  • Such shaver blades are used for example in arthroscopy to invasive remove tissue and removing it through the inner tube.
  • the invention has for its object to provide a surgical instrument and a manufacturing method of the type mentioned above, which avoids the disadvantages of the prior art with a simple structure and simple, cost manufacturability and allows safe storage, especially in design of the tool with a milling head ,
  • the milling head is fixed to the inner tube, wherein the milling head is provided at its end remote from the toothing having a larger diameter than the diameter of the inner tube.
  • the enlarged diameter diameter portion of the milling head comes into abutment with the inner wall of the outer tube, while the inner tube itself is securely guided with a constant gap or distance in the outer tube. This results in an effective slide bearing.
  • the thickened in diameter portion of the milling head forms part of the sliding bearing. It is understood that the end portion of the milling head formed larger in diameter with respect to its axial position, its axial dimensioning and its configuration can be adapted to the particular circumstances.
  • the sliding bearing surface formed by the enlarged in diameter portion of the milling head sliding surface can be made according to the invention of the same material as the inner tube.
  • the sliding bearing surface of the thickened in diameter region may also be provided with a different material, which is applied for example in the form of a coating. Since, according to the invention, only a relatively small increase in diameter is required in order to realize a bearing of the front region of the inner tube in the outer tube, the sliding bearing surface can be formed, for example, by an electrolytically applied coating or the like.
  • FIG. 1 is a schematic, shortened in length side view of an embodiment of the surgical instrument according to the invention.
  • FIG. 2 shows an enlarged detail view, partly in section, of the distal end region of the surgical instrument according to FIG. 1.
  • the surgical instrument according to FIG. 1 comprises an outer tube 1, in which an inner tube 2 is rotatably mounted.
  • an inner tube 2 is rotatably mounted.
  • the front portion of the outer tube 1 is chamfered or provided with an opening, so that a mounted on the distal end of the inner tube 2 milling head can be brought into use.
  • the outer tube 1 may be, for example 150 mm long.
  • the milling head 3 is fixed to the inner tube 2, for example, welded.
  • the milling head has at its end region adjacent to the inner tube 2 a sliding bearing surface 5 which is larger in diameter than the outer diameter of the inner tube 2, so that the sliding bearing surface 5 is slidably guided on the inner wall of the outer tube 1 and together with this Plain bearing forms.

Abstract

The invention relates to a surgical instrument with an outer tube in which an inner tube is mounted so as to rotate, which inner tube is provided, at its free end, with a tool that comprises a cutter head secured to the inner tube, characterized in that the end area of the tool directed away from the cutter head is designed with a greater diameter than the inner tube and forms a slide surface for bearing on an inside face of the outer tube.

Description

Chirurgisches Instrument sowie Verfahren zu dessen Herstellung Surgical instrument and method for its production
Beschreibungdescription
Die Erfindung bezieht sich auf ein chirurgisches Instrument gemäß dem Oberbegriff des Anspruchs 1 sowie ein Verfahren zur Herstellung eines chirurgischen Instruments.The invention relates to a surgical instrument according to the preamble of claim 1 and a method for producing a surgical instrument.
Im Einzelnen bezieht sich die Erfindung auf ein chirurgisches Instrument mit einem Außenrohr, in welchem drehbar ein Innenrohr gelagert ist, welches an seinem freien Ende mit einem Werkzeug versehen ist.In detail, the invention relates to a surgical instrument having an outer tube in which an inner tube is rotatably mounted, which is provided at its free end with a tool.
Derartige Instrumente werden auch als sogenannte Shaver-Blades bezeichnet. Zum Stand der Technik wird beispielhaft auf die EP 1 006 898 B1 verwiesen.Such instruments are also referred to as so-called shaver blades. For the state of the art, reference is made by way of example to EP 1 006 898 B1.
Das Außenrohr wird mittels einer Kupplungseinrichtung drehfest an einem Antrieb gelagert, während das inπenrohr mit relativ großer Drehzahl von bis zu 12.000 Umin" 1 gedreht wird. Derartige Shaver-Blades werden beispielsweise in der Arthroskopie eingesetzt, um invasiv Gewebe zu entfernen und durch das Innenrohr abzusaugen.The outer tube is rotationally fixed by means of a coupling device mounted on one drive, while being inπenrohr rotated with a relatively high speed of up to 12,000 rpm "1 Such shaver blades are used for example in arthroscopy to invasive remove tissue and removing it through the inner tube. ,
Aus dem Stand der Technik ist es bekannt, dass das Innenrohr mit Spiel in dem Au- ßenrohr rotiert. Hierdurch ergibt sich eine hinsichtlich der Passungen ungenaue Gleitlagerung, welche zu erhöhtem Verschleiß und Widerstandsmomenten führt.From the prior art it is known that the inner tube with play in the Au ßenrohr rotates. This results in an inaccurate in terms of fits sliding bearing, which leads to increased wear and resistance moments.
Aus dem Stand der Technik ist es bekannt, zusätzliche Gleitlager auf das Innenrohr aufzuschieben oder aufzuschrumpfen. Derartige ringförmige Buchsen können beispielsweise auch aus einem unterschiedlichen Material bestehen, wie das Innenrohr. Abgesehen von den sich aus der komplizierten Herstellung ergebenden Kosten weisen diese Lösungen den Nachteil auf, dass sich in den auftretenden Fugen Keime, Verunreinigungen oder Ähnliches ansammeln können, so dass die erforderliche Reinigung oder Sterilisierung nicht oder nur begrenzt möglich ist.From the prior art it is known to postpone or shrink additional slide bearings on the inner tube. Such annular bushes may for example also consist of a different material, such as the inner tube. Apart from the resulting from the complicated production costs, these solutions have the disadvantage that can accumulate in the joints occurring germs, impurities or the like, so that the required cleaning or sterilization is not or only to a limited extent possible.
Der Erfindung liegt die Aufgabe zugrunde, ein chirurgisches Instrument und ein Herstellungsverfahren der eingangs genannten Art zu schaffen, welches bei einfachem Aufbau und einfacher, kostengünstiger Herstellbarkeit die Nachteile des Standes der Technik vermeidet und eine sichere Lagerung, insbesondere bei Ausgestaltung des Werkzeugs mit einem Fräskopf ermöglicht.The invention has for its object to provide a surgical instrument and a manufacturing method of the type mentioned above, which avoids the disadvantages of the prior art with a simple structure and simple, cost manufacturability and allows safe storage, especially in design of the tool with a milling head ,
Erfindungsgemäß wird die Aufgabe durch die Merkmalskombination des Anspruchs 1 bzw. 8 gelöst, die Unteransprüche zeigen weitere vorteilhafte Ausgestaltungen der Erfindung.According to the invention the object is achieved by the feature combination of claim 1 or 8, the dependent claims show further advantageous embodiments of the invention.
Erfindungsgemäß ist somit vorgesehen, dass der Fräskopf an dem Innenrohr befestigt ist, wobei der Fräskopf an seinem der Verzahnung abgewandten Endbereich mit einem größeren Durchmesser versehen ist, als der Durchmesser des Innenrohrs. Somit gelangt der im Durchmesser vergrößerte Durchmesser-Bereich des Fräskopfes in Anlage an die Innenwandung des Außenrohrs, während das Innenrohr selbst sicher mit einem gleichbleibenden Spalt oder Abstand in dem Außenrohr geführt wird. Es ergibt sich somit eine wirkungsvolle Gleitlagerung.According to the invention it is thus provided that the milling head is fixed to the inner tube, wherein the milling head is provided at its end remote from the toothing having a larger diameter than the diameter of the inner tube. Thus, the enlarged diameter diameter portion of the milling head comes into abutment with the inner wall of the outer tube, while the inner tube itself is securely guided with a constant gap or distance in the outer tube. This results in an effective slide bearing.
Erfindungsgemäß ist es besonders vorteilhaft, dass keine zusätzlichen Bauelemente oder Komponenten zur Ausbildung der Gleitlagerung verwendet werden müssen. Vielmehr bildet der im Durchmesser verdickte Bereich des Fräskopfes einen Teil des Gleitlagers. Es versteht sich, dass der im Durchmesser größer ausgebildete Endbereich des Fräskopfes hinsichtlich seiner axialen Lage, seiner axialen Dimensionierung und seiner Ausgestaltung den jeweiligen Gegebenheiten angepasst werden kann.According to the invention it is particularly advantageous that no additional components or components must be used to form the sliding bearing. Rather, the thickened in diameter portion of the milling head forms part of the sliding bearing. It is understood that the end portion of the milling head formed larger in diameter with respect to its axial position, its axial dimensioning and its configuration can be adapted to the particular circumstances.
Die durch den im Durchmesser vergrößerten Bereich des Fräskopfes gebildete Gleitlagerfläche kann erfindungsgemäß aus demselben Werkstoff wie wie das Innenrohr gefertigt sein.The sliding bearing surface formed by the enlarged in diameter portion of the milling head sliding surface can be made according to the invention of the same material as the inner tube.
Erfindungsgemäß kann die Gleitlagerfläche des im Durchmesser verdickten Bereichs auch mit einem unterschiedlichen Werkstoff versehen sein, welcher beispielsweise in Form einer Beschichtung aufgebracht wird. Da erfindungsgemäß nur eine relativ geringfügige Durchmesservergrößerung erforderlich ist, um eine Lagerung des vorderen Bereichs des Innenrohrs in dem Außenrohr zu realisieren, kann die Gleitlagerfläche beispielsweise durch eine elektrolytisch aufgebrachte Beschichtung oder Ähnliches gebildet werden.According to the invention, the sliding bearing surface of the thickened in diameter region may also be provided with a different material, which is applied for example in the form of a coating. Since, according to the invention, only a relatively small increase in diameter is required in order to realize a bearing of the front region of the inner tube in the outer tube, the sliding bearing surface can be formed, for example, by an electrolytically applied coating or the like.
Im Folgenden wird die Erfindung anhand eines Ausführungsbeispiels in Verbindung mit der Zeichnung beschrieben. Dabei zeigt:In the following the invention will be described by means of an embodiment in conjunction with the drawing. Showing:
Fig. 1 eine schematische, in der Länge verkürzte Seitenansicht eines Ausführungsbeispiels des erfindungsgemäßen chirurgischen Instruments, und1 is a schematic, shortened in length side view of an embodiment of the surgical instrument according to the invention, and
Fig. 2 eine vergrößerte Detailansicht, teils im Schnitt, des distalen Endbereichs des chirurgischen Instruments gemäß Fig. 1.2 shows an enlarged detail view, partly in section, of the distal end region of the surgical instrument according to FIG. 1.
Das chirurgische Instrument gemäß Fig. 1 umfasst ein Außenrohr 1 , in welchem drehbar ein Innenrohr 2 gelagert ist. Hinsichtlich der Lagerung und der Verbindung mit einer Antriebseinheit kann auf den Stand der Technik verwiesen werden, so dass detaillierte Beschreibungen an dieser Stelle nicht erforderlich sind.The surgical instrument according to FIG. 1 comprises an outer tube 1, in which an inner tube 2 is rotatably mounted. With regard to the storage and the connection with a drive unit, reference may be made to the prior art, so that detailed descriptions are not required at this point.
Wie sich aus der Darstellung der Fig. 2 ergibt, ist der vordere Bereich des Außenrohres 1 abgeschrägt oder mit einer Öffnung versehen, so dass ein an dem distalen Ende des Innenrohrs 2 gelagerter Fräskopf in Einsatz bringbar ist. Das Außenrohr 1 kann beispielsweise 150 mm lang sein.As is apparent from the illustration of Fig. 2, the front portion of the outer tube 1 is chamfered or provided with an opening, so that a mounted on the distal end of the inner tube 2 milling head can be brought into use. The outer tube 1 may be, for example 150 mm long.
Der Fräskopf 3 ist an dem Innenrohr 2 befestigt, beispielsweise verschweißt.The milling head 3 is fixed to the inner tube 2, for example, welded.
Erfindungsgemäß weist der Fräskopf an seinem an das Innenrohr 2 angrenzenden Endbereich eine Gleitlagerfläche 5 auf, welche im Durchmesser größer ausgebildet ist, als der Außendurchmesser des Innenrohrs 2, so dass die Gleitlagerfläche 5 gleitend an der Innenwandung des Außenrohrs 1 geführt ist und mit dieser zusammen ein Gleitlager bildet. According to the invention, the milling head has at its end region adjacent to the inner tube 2 a sliding bearing surface 5 which is larger in diameter than the outer diameter of the inner tube 2, so that the sliding bearing surface 5 is slidably guided on the inner wall of the outer tube 1 and together with this Plain bearing forms.
BezugszeichenlisteLIST OF REFERENCE NUMBERS
1 Außenrohr Innenrohr Fräserkopf Gleitlagerfläche Ausnehmung 1 outer tube inner tube cutter head sliding bearing recess

Claims

Ansprüche claims
1. Chirurgisches Instrument mit einem Außenrohr (1), in welchem drehbar ein Innenrohr (2) gelagert ist, welches an seinem freien Ende mit einem Werkzeug versehen ist, welches einen Fräserkopf (3) umfasst, welcher mittels eines Schaftes (4) an dem Innenrohr (2) befestigt ist, dadurch gekennzeichnet, dass der dem Fräserkopf (3) abgewandte Endbereich des Schaftes (4) des Werkzeugs mit einem größeren Durchmesser ausgebildet ist, als das Innenrohr (2) und eine Gleitlagerfläche (5) zur Anlage an eine Innenfläche des Außenrohrs (1) bildet.1. Surgical instrument with an outer tube (1) in which an inner tube (2) is rotatably mounted, which is provided at its free end with a tool which comprises a cutter head (3) by means of a shank (4) on the Inner tube (2) is fixed, characterized in that the cutter head (3) facing away from the end portion of the shank (4) of the tool is formed with a larger diameter than the inner tube (2) and a sliding bearing surface (5) for contact with an inner surface of the outer tube (1) forms.
2. Chirurgisches Instrument nach Anspruch 1 , dadurch gekennzeichnet, dass die Gleitlagerfläche (5) aus demselben Werkstoff wie das Werkzeug gefertigt ist.2. Surgical instrument according to claim 1, characterized in that the sliding bearing surface (5) is made of the same material as the tool.
3. Chirurgisches Instrument nach Anspruch 1 , dadurch gekennzeichnet, dass die Gleitlagerfläche (5) aus demselben Werkstoff wie das Innenrohr (2) gefertigt ist.3. Surgical instrument according to claim 1, characterized in that the sliding bearing surface (5) is made of the same material as the inner tube (2).
4. Chirurgisches Instrument nach Anspruch 1 , dadurch gekennzeichnet, dass die Gleitlagerfläche (5) aus einem unterschiedlichen Werkstoff wie der Schaft (4) oder das Innenrohr (2) gefertigt ist.4. A surgical instrument according to claim 1, characterized in that the sliding bearing surface (5) made of a different material such as the shaft (4) or the inner tube (2) is made.
5. Chirurgisches Instrument nach Anspruch 4, dadurch gekennzeichnet, dass die Gleitlagerfläche (5) mit einer Beschichtung versehen ist.5. A surgical instrument according to claim 4, characterized in that the sliding bearing surface (5) is provided with a coating.
6. Chirurgisches Instrument nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass der Fräserkopf (3) am distalen Ende hohl ausgebildet und mit einer Ausnehmung (6) versehen ist.6. Surgical instrument according to one of claims 1 to 5, characterized in that the cutter head (3) is hollow at the distal end and provided with a recess (6).
7. Chirurgisches Instrument nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass der Übergangsbεreich zwischen den Fräserkopf (3) und der Gleitlagerfläche (5) im Durchmesser reduziert ausgebildet ist.7. Surgical instrument according to one of claims 1 to 6, characterized in that the Übergangssbεreich between the cutter head (3) and the slide bearing surface (5) is formed reduced in diameter.
8. Verfahren zur Herstellung eines chirurgischen Instruments mit einem Außenrohr (1), in welchem drehbar ein Innenrohr (2) gelagert ist, welches an seinem freien Ende mit einem Werkzeug versehen ist, welches einen Fräserkopf (3) umfasst, welcher mittels eines Schaftes (4) an dem Innenrohr (2) befestigt ist, dadurch gekennzeichnet, dass zunächst ein Rohling des Werkzeugs hergestellt wird, welcher zumindest im Bereich des Schaftes einen größeren Durchmesser aufweist, als der fertig bearbeitete, eine Gleitlagerfläche (5) bildende Bereich des Schaftes, dass der Endbereich des Rohlings mit einem Endbereich des Innenrohrs gefügt wird und dass nachfolgend die Verzahnung sowie der Außendurchmesser der Gleitlagerfläche bearbeitet werden.8. A method for producing a surgical instrument having an outer tube (1), in which rotatably an inner tube (2) is mounted, which at its free End is provided with a tool which comprises a cutter head (3) which is fixed by means of a shaft (4) on the inner tube (2), characterized in that first a blank of the tool is produced, which at least in the region of the shaft a Having larger diameter than the finished machined, a sliding bearing surface (5) forming portion of the shaft, that the end portion of the blank is joined to an end portion of the inner tube and that subsequently the teeth and the outer diameter of the sliding bearing surface are processed.
9. Verfahren nach Anspruch 8, dadurch gekennzeichnet, dass bei dem Arbeitsschritt der Bearbeitung des Außendurchmessers der Gleitlagerfläche (5) und der Bearbeitung des Werkzeugs eine Einspannung des Innenrohrs (2) an einer Werkzeugmaschine erfolgt.9. The method according to claim 8, characterized in that in the step of machining the outer diameter of the sliding bearing surface (5) and the machining of the tool, a clamping of the inner tube (2) takes place on a machine tool.
10. Verfahren nach Anspruch 8 oder 9, dadurch gekennzeichnet, dass die mechanische Bearbeitung des Fräserkopfes und des Schaftes (4) mittels eines Schleifverfahrens erfolgen. 10. The method according to claim 8 or 9, characterized in that the mechanical processing of the cutter head and the shaft (4) by means of a grinding process.
EP08758889A 2007-05-31 2008-05-30 Surgical instrument and method for production thereof Withdrawn EP2150185A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007025242.2A DE102007025242B4 (en) 2007-05-31 2007-05-31 Surgical instrument
PCT/EP2008/004318 WO2008145380A1 (en) 2007-05-31 2008-05-30 Surgical instrument and method for production thereof

Publications (1)

Publication Number Publication Date
EP2150185A1 true EP2150185A1 (en) 2010-02-10

Family

ID=39673200

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08758889A Withdrawn EP2150185A1 (en) 2007-05-31 2008-05-30 Surgical instrument and method for production thereof

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EP (1) EP2150185A1 (en)
DE (1) DE102007025242B4 (en)
WO (1) WO2008145380A1 (en)

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DE102009013451B4 (en) * 2009-03-18 2011-09-01 Karl-Heinz Heuckmann Medical instrumentation for dental applications for bone formation
RU2556973C2 (en) 2010-03-24 2015-07-20 Смит Энд Нефью, Инк. Instrument for arthroscopic resection
DE102010037974A1 (en) * 2010-10-05 2012-04-05 Trokamed Gmbh Medical instrument
CN106913372A (en) * 2017-02-10 2017-07-04 青岛市城阳区人民医院 A kind of quick device for excising of thyroid gland
CH719484A1 (en) * 2022-03-08 2023-09-15 Swiss Medical Instr Ag Method for producing an inner tube for a surgical cutting instrument.

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EP1006898B1 (en) * 1996-12-23 2005-02-23 Smith & Nephew, Inc. Surgical instrument

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Title
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DE102007025242A1 (en) 2008-12-11
WO2008145380A1 (en) 2008-12-04
DE102007025242B4 (en) 2014-07-31

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