DE102004020383A1 - Endoscope tube for use with minimally invasive surgery equipment is made of a compound metal-ceramic material with a specified minimum value of the modulus of elasticity - Google Patents
Endoscope tube for use with minimally invasive surgery equipment is made of a compound metal-ceramic material with a specified minimum value of the modulus of elasticity Download PDFInfo
- Publication number
- DE102004020383A1 DE102004020383A1 DE200410020383 DE102004020383A DE102004020383A1 DE 102004020383 A1 DE102004020383 A1 DE 102004020383A1 DE 200410020383 DE200410020383 DE 200410020383 DE 102004020383 A DE102004020383 A DE 102004020383A DE 102004020383 A1 DE102004020383 A1 DE 102004020383A1
- Authority
- DE
- Germany
- Prior art keywords
- endoscope tube
- modulus
- tubular shaft
- minimally invasive
- elasticity
- 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- Withdrawn
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
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00064—Constructional details of the endoscope body
- A61B1/00071—Insertion part of the endoscope body
- A61B1/00078—Insertion part of the endoscope body with stiffening means
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
- A61B17/3417—Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating
- A61B17/3421—Cannulas
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B2017/00831—Material properties
- A61B2017/0088—Material properties ceramic
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/28—Surgical forceps
- A61B17/29—Forceps for use in minimally invasive surgery
- A61B2017/2901—Details of shaft
Abstract
Description
Die Erfindung betrifft ein Endoskop-Rohr zur Verwendung in minimalinvasiven Operationsgeräten, wie Endoskopen, laparoskopischen Scheren und dergleichen.The The invention relates to an endoscope tube for use in minimally invasive Operating equipment, such as Endoscopes, laparoscopic scissors and the like.
Zum Hintergrund der Erfindung ist festzuhalten, dass bei der minimalinvasiven Operationstechnik die entsprechenden chirurgischen Instrumente durch kleine Öffnungen in der Haut über Einführhilfen (Trokar) in den Körper eingeführt und von außen betätigt werden. Diese Instrumente erfüllen dabei wichtige Operationsprozesse, wie das Schneiden von Weichgewebe, die Verödung von Blutgefäßen, das Zurückhalten von Gewebestrukturen, das Entfernen von abgetrenntem Gewebe und eine optische Sensorik des Operationsverlaufes. Die aktiven Werkzeuge, wie Scherblätter, Klammern oder optische Elemente, liegen am in den Körper einzuführenden Ende eines Rohres (Endoskop bzw. endoskopisches Operationsinstrument) und werden durch Seilzüge oder Kabel mit außenliegenden Betätigungs- oder Beobachtungseinheiten verbunden. Über den Rohrschaft des Endoskop-Rohres werden dann Seilzüge, Kabel, Lichtleiter oder dergleichen verlegt.To the Background of the invention is to be noted that in the minimally invasive Surgical Technique the appropriate surgical instruments small openings in the skin above Insertion aids (trocar) in the body introduced and from the outside actuated become. These instruments meet important surgical processes, such as the cutting of soft tissue, the desolation of blood vessels, the retention tissue structures, the removal of detached tissue and an optical sensor of the course of the operation. The active tools, like Shear blades, Braces or optical elements lie on the body to be inserted End of a tube (endoscope or endoscopic surgical instrument) and are by cables or cable with external Actuation or observation units connected. about The tubular shaft of the endoscope tube then cables, cables, optical fibers or the like.
Neben dieser Führungsfunktion für die genannten Verbindungselemente hat das Endoskop-Rohr auch eine mechanische Funktion dahingehend, dass es dem Operateur ermöglicht, durch Manipulation des minimal-invasiven Operationsgerätes dessen Werkzeuge im Inneren des Körpers zielgenau in eine gewünschte Position zu bringen. Für eine zielgenaue Platzierbarkeit des körperinneren Endes darf sich dieses möglichst wenig durchbiegen, es muss also möglichst steif sein.Next this leadership function for the said connecting elements, the endoscope tube also has a mechanical Function in that it allows the surgeon, through manipulation of the minimally invasive operating device whose tools are inside of the body exactly in a desired Position. For A precise placement of the inner end of the body is allowed this possible little bend, so it must be as stiff as possible.
Bekannte Endoskop-Rohre von derzeit verfügbaren minimal-invasiven Operationsgeräten weisen ausnahmslos Rohrschäfte aus hochlegierten Edelstählen auf, die eine im Rahmen metallischer Werkstoffe an sich hohe Steifigkeit – materialtechnisch erfasst durch das Elastizitäts-Modul von ca. 200 GPa – aufweisen. Insbesondere bei relativ dünnwandigen und langen Rohrschäften biegen sich derartige Endoskop-Rohre jedoch immer noch unerwünscht stark durch.Known Endoscope tubes from currently available minimally invasive surgical equipment all have tube shafts made of high-alloy stainless steels on, the one in the context of metallic materials in itself high rigidity - material technology detected by the modulus of elasticity of about 200 GPa - exhibit. Especially with relatively thin-walled and long pipe shafts However, such endoscope tubes still bend undesirably strong by.
Zur Lösung dieser Problematik schlägt die Erfindung vor, den Rohrschaft eines Endoskop-Rohres aus einem Metall-Keramik-Verbundwerkstoff mit einem E-Modul von mindestens 350 GPa zu fertigen. Bevorzugte materialtechnische Kenngrößen des Rohrschaftes liegen für die Biegebruchfestigkeit bei mindestens 1500 MPa und für die Bruchzähigkeit bei mindestens 8 Mpa m1/2. Als besonders geeigneter Verbund-Werkstoff im Rahmen dieser Kenngrößen hat sich Wolframkarbid-Kobalt mit einem Kobalt-Anteil von mindestens 6 %, vorzugsweise etwa 10 % herauskristallisiert.To solve this problem, the invention proposes to manufacture the tubular shaft of an endoscope tube made of a metal-ceramic composite material having an E-modulus of at least 350 GPa. Preferred material technical characteristics of the tubular shaft are at least 1500 MPa for the bending strength and at least 8 Mpa m 1/2 for the fracture toughness. As a particularly suitable composite material in the context of these parameters, tungsten carbide cobalt has crystallized out with a cobalt content of at least 6%, preferably about 10%.
Aufgrund der materialtechnischen Kenngrößen der erfindungsgemäßen Endoskop-Rohre weisen diese nicht nur die notwendige Biegesteifigkeit, sondern auch eine ausreichende Duktilität (Bruchzähigkeit) und Biegebruchfestigkeit auf, so dass während einer Operation auch höhere Biegemomente zu keiner signifikanten Bruchgefahr führen. Keramik-Sintermaterialien mit ähnlich hohem E-Modul, wie ZrO2, Al2O3, SiC oder Si3N4 weisen demgegenüber so geringe Duktilitäten und Biegebruchfestigkeiten auf, dass sie für den Einsatz als biegesteife Endoskop-Rohre praktisch weniger geeignet sind.Due to the material-technical characteristics of the endoscope tubes according to the invention, these not only have the necessary flexural rigidity, but also sufficient ductility (fracture toughness) and bending strength, so that during an operation even higher bending moments do not lead to any significant risk of breakage. Ceramic sintered materials with a similar high modulus of elasticity, such as ZrO 2 , Al 2 O 3 , SiC or Si 3 N 4 , on the other hand, have such low ductility and bending fracture strengths that they are practically less suitable for use as rigid endoscope tubes.
In einer weiteren bevorzugten Ausgestaltung ist der Rohrschaft der Endoskop-Rohre mit einer Schutzhülle aus einem PTFE-Schrumpffolienmaterial belegt, das inert und körperverträglich ist. Damit ist der Rohrschaft elektrisch isoliert.In In another preferred embodiment, the tubular shaft is the Endoscope tubes with a protective cover made of a PTFE shrink film material that is inert and biocompatible. Thus, the tubular shaft is electrically isolated.
Weitere Merkmale, Einzelheiten und Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung, in der ein Ausführungsbeispiel anhand der beigefügten Zeichnungen näher erläutert wird. Es zeigen:Further Features, details and advantages of the invention will become apparent the following description, in which an embodiment with reference to the accompanying drawings is explained in more detail. Show it:
Das
in
Der
Rohrschaft
- – E-Modul: 550 bis 620 GPa
- – Biegebruchfestigkeit: 2150 bis 4600 MPa
- – Bruchzähigkeit: ca. 10 MPa m1/2
- – Härte: 1670 bis 1970 Hv10
- - E modulus: 550 to 620 GPa
- Bending strength: 2150 to 4600 MPa
- - fracture toughness: approx. 10 MPa m 1/2
- - Hardness: 1670 to 1970 Hv 10
Die
Abmessungen des Rohrschaftes
Die
Herstellungsverfahren für
solche Hartmetall-Rohrschäfte
sind in der Werkstofftechnik bekannt und werden z. B. für die Herstellung
von Hartmetall-Elektrodenröhrchen
für die
Elektro-Erosivbearbeitung von metallischen Werkstoffen angewendet. Ein
Rohrschaft
- – Biegebruchfestigkeit: 2150 MPa
- – E-Modul: 620 GPa
- – Bruchzähigkeit: 10 MPa m1/2
- Bending strength: 2150 MPa
- - modulus of elasticity: 620 GPa
- - fracture toughness: 10 MPa m 1/2
Wie
aus
Claims (7)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200410020383 DE102004020383A1 (en) | 2004-04-23 | 2004-04-23 | Endoscope tube for use with minimally invasive surgery equipment is made of a compound metal-ceramic material with a specified minimum value of the modulus of elasticity |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200410020383 DE102004020383A1 (en) | 2004-04-23 | 2004-04-23 | Endoscope tube for use with minimally invasive surgery equipment is made of a compound metal-ceramic material with a specified minimum value of the modulus of elasticity |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102004020383A1 true DE102004020383A1 (en) | 2005-11-10 |
Family
ID=35140162
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE200410020383 Withdrawn DE102004020383A1 (en) | 2004-04-23 | 2004-04-23 | Endoscope tube for use with minimally invasive surgery equipment is made of a compound metal-ceramic material with a specified minimum value of the modulus of elasticity |
Country Status (1)
Country | Link |
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DE (1) | DE102004020383A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009034251A1 (en) * | 2009-07-22 | 2011-01-27 | Urotech Gmbh | Cover for tubular or tube-shaped part of e.g. endoscope utilized during laparoscopy, has inner surface adhered on tubular/tube-shaped part, where gliding properties of outer surface are improved against cover-free portion of part in cavity |
WO2013023740A1 (en) * | 2011-08-15 | 2013-02-21 | Olympus Winter & Ibe Gmbh | Shaft of a laparoscopic instrument |
DE102012021614A1 (en) | 2012-11-06 | 2014-05-08 | Olympus Winter & Ibe Gmbh | Medical endoscope |
WO2017017192A1 (en) * | 2015-07-29 | 2017-02-02 | Olympus Winter & Ibe Gmbh | Surgical shaft instrument |
DE102021119515A1 (en) | 2021-07-28 | 2023-02-02 | Karl Storz Se & Co. Kg | Shaft for a medical instrument with a profile tube, medical instrument and robot |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2642489C3 (en) * | 1976-09-22 | 1979-04-19 | Richard Wolf Gmbh, 7134 Knittlingen | Unipolar coagulation forceps |
US5830214A (en) * | 1994-11-08 | 1998-11-03 | Heartport, Inc. | Fluid-evacuating electrosurgical device |
WO2000067650A1 (en) * | 1999-05-07 | 2000-11-16 | University Of Virginia Patent Foundation | Method and system for fusing a spinal region |
US20040064069A1 (en) * | 2002-09-30 | 2004-04-01 | Reynolds Brian R. | Medical device with support member |
-
2004
- 2004-04-23 DE DE200410020383 patent/DE102004020383A1/en not_active Withdrawn
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2642489C3 (en) * | 1976-09-22 | 1979-04-19 | Richard Wolf Gmbh, 7134 Knittlingen | Unipolar coagulation forceps |
US5830214A (en) * | 1994-11-08 | 1998-11-03 | Heartport, Inc. | Fluid-evacuating electrosurgical device |
WO2000067650A1 (en) * | 1999-05-07 | 2000-11-16 | University Of Virginia Patent Foundation | Method and system for fusing a spinal region |
US20040064069A1 (en) * | 2002-09-30 | 2004-04-01 | Reynolds Brian R. | Medical device with support member |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009034251A1 (en) * | 2009-07-22 | 2011-01-27 | Urotech Gmbh | Cover for tubular or tube-shaped part of e.g. endoscope utilized during laparoscopy, has inner surface adhered on tubular/tube-shaped part, where gliding properties of outer surface are improved against cover-free portion of part in cavity |
WO2013023740A1 (en) * | 2011-08-15 | 2013-02-21 | Olympus Winter & Ibe Gmbh | Shaft of a laparoscopic instrument |
US9517057B2 (en) | 2011-08-15 | 2016-12-13 | Olympus Winter & Ibe Gmbh | Shaft of a laparoscopic instrument |
DE102012021614A1 (en) | 2012-11-06 | 2014-05-08 | Olympus Winter & Ibe Gmbh | Medical endoscope |
WO2014072023A1 (en) * | 2012-11-06 | 2014-05-15 | Olympus Winter & Ibe Gmbh | Medical endoscope |
CN104755006A (en) * | 2012-11-06 | 2015-07-01 | 奥林匹斯冬季和Ibe有限公司 | Medical endoscope |
WO2017017192A1 (en) * | 2015-07-29 | 2017-02-02 | Olympus Winter & Ibe Gmbh | Surgical shaft instrument |
DE102021119515A1 (en) | 2021-07-28 | 2023-02-02 | Karl Storz Se & Co. Kg | Shaft for a medical instrument with a profile tube, medical instrument and robot |
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OM8 | Search report available as to paragraph 43 lit. 1 sentence 1 patent law | ||
8139 | Disposal/non-payment of the annual fee |