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WO1999044489A1 - Partie pliante d'une extremite distale d'un instrument d'utilisation endoscopique - Google Patents

Partie pliante d'une extremite distale d'un instrument d'utilisation endoscopique Download PDF

Info

Publication number
WO1999044489A1
WO1999044489A1 PCT/EP1999/001230 EP9901230W WO9944489A1 WO 1999044489 A1 WO1999044489 A1 WO 1999044489A1 EP 9901230 W EP9901230 W EP 9901230W WO 9944489 A1 WO9944489 A1 WO 9944489A1
Authority
WO
WIPO (PCT)
Prior art keywords
part according
incisions
swiveling
distal end
depth
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.)
Ceased
Application number
PCT/EP1999/001230
Other languages
German (de)
English (en)
Inventor
Bernd Vogel
Harald Fischer
Klaus Brhel
Wilhelm Pfleging
Heino Besser
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.)
Karlsruher Institut fuer Technologie KIT
Original Assignee
Forschungszentrum Karlsruhe GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Forschungszentrum Karlsruhe GmbH filed Critical Forschungszentrum Karlsruhe GmbH
Publication of WO1999044489A1 publication Critical patent/WO1999044489A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • A61B1/005—Flexible endoscopes
    • A61B1/0051—Flexible endoscopes with controlled bending of insertion part
    • A61B1/0055—Constructional details of insertion parts, e.g. vertebral elements
    • A61B1/0056—Constructional details of insertion parts, e.g. vertebral elements the insertion parts being asymmetric, e.g. for unilateral bending mechanisms

Definitions

  • the invention relates to a pivotable part at the distal end of an endoscopic instrument.
  • Such endoscopes meet the requirement to be mobile at the immediate surgical site and have a large swiveling range, on the one hand for diagnosis such.
  • joints have a symmetrical or one-sided, flat swivel range, which is determined by the geometry and number of joint elements.
  • a fundamental disadvantage that cannot be suppressed from a technical point of view is the articulation of the joint, which can be limited but not completely avoided with increasing effort.
  • a high degree of dimensional accuracy is mandatory, which is associated with high manufacturing costs.
  • such sliding joint geometries are problematic for cleaning and sterilization.
  • the invention is based on the object of designing the end region of an endoscope or, especially for abdominal surgery, a laparoscope technically so that when the endoscope shaft is stationary, a large swivel range for the distal end
  • a pivotable part according to the characterizing features of claim 1.
  • Such a part is made of a tissue-compatible, highly elastic material, into which incisions with a predetermined depth are made with respect to the axis.
  • the respective cutting plane of the incisions lie parallel to one another and are penetrated by the pipe axis.
  • the pivotable part is made of highly elastic material, so that it can be pivoted on a plane in the lumen pulling and / or pushing device. This allows the distal end of the part anchored to the endoscope to be pivoted flat and symmetrically to the left and right.
  • the cutting planes of the incisions are preferably penetrated perpendicularly by the elongated axis of the sleeve (claim 2).
  • the incisions can also be made so that the pipe axis and the normal of the planes form an acute angle.
  • the shape of the incisions is important, especially in the end regions of an incision (claim 6). Due to their shape, these areas are decisive for the always elastic pivoting.
  • the geometry of the incisions is based on the strength of the sleeve material. At the respective incision ends there should still be elastic conditions with maximum slewing of the sleeve. The incisions are excluded in their end areas because of the strongest deformation there.
  • the annular webs formed by the incisions run thinner there and have their greatest width in the middle. Other incision and web shapes are also possible, as long as the tensile and compressive load with maximum swiveling still safely loads in the elastic range and there is therefore no risk of cracking.
  • a Bowden cable (claim 11) is technically simple and reliable as a pulling device and, if the pull is sufficiently stiff, also as a pushing device. However, since the endoscope or laparoscope can be rotated around its shaft axis, swiveling by pulling alone is sufficient.
  • this pivotable part is an elastic, in the conventional sense joint-free component that forms a lumen. It is again like a multi-joint mechanism, the "elementary joints" of which consist of material zones that are elastically stressed by tension and pressure but are held in position by means of the web connecting the cylinders, without any areas of these zones sliding against one another. There is none Due to the thin-walled cylindrical sleeve shape, in contrast to the classic joint mechanism, there is a large clear width of the sleeve, which is only reduced by the pulling and / or sliding device.
  • FIG. 2 the underlying flat sheet metal strip with incision geometry
  • Figure 4. the overall view of the instrument with distal, pivotable part.
  • the exemplary embodiment of the pivotable part at the distal ene doskopende initially consists of the flat, rectangular, cold rolled NiTi sheet superelastic 170-500 .mu.m thick, the drawn according to the Figure 2 target with an automatic ⁇ overbased or computer-controlled Schneidegerat, a laser - jet cutter, is cut out.
  • the cut sheet is step ⁇ as mountains leading the Zylmdergeometrie.
  • specially made tools outer shapes and inner sleeves
  • 3a shows the finished part with the scale for large orientation.
  • 3b shows a view into the lumen of the part with the guide bushes for the Bowden cable.
  • Fig. 3c shows the Bowden cable, which consists of a stiff wire, so that by pulling a Swivel direction and by pushing the opposite one can be selected.
  • the movable part is placed on the endoscope or laparoscope at its end lying outside the right plane of the drawing in FIG. 1 and anchored.
  • FIG. 4 it is shown on the far left as the last, elongated pipe piece that is operated via the pulling and / or pushing device, which is only indicated by the thicker line on the lower shaft contour edge that does not go all the way to the left contour.
  • the use of the super elastic material TiNi has the advantage that the installation of a cable is sufficient, which still leaves a lot of free space in the lumen.
  • the swiveling part is above all easy to clean and sterilize, because there are no difficult to access joint areas and therefore there are hidden surfaces that move against each other.
  • the lightness of the sleeve material is an additional advantage in terms of long-term handling.

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Surgery (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Biomedical Technology (AREA)
  • Optics & Photonics (AREA)
  • Pathology (AREA)
  • Radiology & Medical Imaging (AREA)
  • Biophysics (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Endoscopes (AREA)

Abstract

L'invention concerne une partie pliante d'une extrémité distale d'un endoscope constituée d'une matière hautement élastique et histocompatible. Cette partie est pourvue d'entailles d'une profondeur déterminée et dont les plans de coupe respectifs coupent les axes. Cette structure dans une certaine mesure à articulation multiple confère une grande mobilité élastique. Cette partie étant réalisée d'une seule pièce, elle est dépourvue de surfaces mobiles les unes par rapport aux autres et couvertes, problématiques pour le nettoyage et la stérilisation. La partie mobile réalisée en NiTi superélastique est un chapeau pliant léger et de grande résistance et pourtant élastique destiné à un endoscope.
PCT/EP1999/001230 1998-03-06 1999-02-25 Partie pliante d'une extremite distale d'un instrument d'utilisation endoscopique Ceased WO1999044489A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19809588 1998-03-06
DE19809588.0 1998-03-06

Publications (1)

Publication Number Publication Date
WO1999044489A1 true WO1999044489A1 (fr) 1999-09-10

Family

ID=7859913

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1999/001230 Ceased WO1999044489A1 (fr) 1998-03-06 1999-02-25 Partie pliante d'une extremite distale d'un instrument d'utilisation endoscopique

Country Status (1)

Country Link
WO (1) WO1999044489A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010034345A1 (de) * 2010-08-14 2012-02-16 Richard Wolf Gmbh Endoskopisches Instrument

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4353358A (en) * 1980-08-28 1982-10-12 Emerson Reynolds L Sigmoidoscope
EP0098100A2 (fr) * 1982-06-24 1984-01-11 Olympus Optical Co., Ltd. Tube souple pour un endoscope
GB2130885A (en) * 1982-11-16 1984-06-13 Elven Precision Limited Flexible distal end portion for endoscope
US4911148A (en) * 1989-03-14 1990-03-27 Intramed Laboratories, Inc. Deflectable-end endoscope with detachable flexible shaft assembly
DE4201280C1 (fr) * 1992-01-18 1992-12-10 Richard Wolf Gmbh, 7134 Knittlingen, De
FR2713492A1 (fr) * 1993-12-09 1995-06-16 Microfil Ind Sa Guide tubulaire orientable, notamment pour un dispositif médico-chirurgical.
EP0764424A2 (fr) * 1995-09-22 1997-03-26 Mitsubishi Cable Industries, Ltd. Mécanisme de flexion et stéréoscope utilisant un tel mécanisme
DE19721030C1 (de) 1997-05-20 1998-12-17 Karlsruhe Forschzent Vorrichtung zum Führen einer medizinischen Sonde

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4353358A (en) * 1980-08-28 1982-10-12 Emerson Reynolds L Sigmoidoscope
EP0098100A2 (fr) * 1982-06-24 1984-01-11 Olympus Optical Co., Ltd. Tube souple pour un endoscope
GB2130885A (en) * 1982-11-16 1984-06-13 Elven Precision Limited Flexible distal end portion for endoscope
US4911148A (en) * 1989-03-14 1990-03-27 Intramed Laboratories, Inc. Deflectable-end endoscope with detachable flexible shaft assembly
DE4201280C1 (fr) * 1992-01-18 1992-12-10 Richard Wolf Gmbh, 7134 Knittlingen, De
FR2713492A1 (fr) * 1993-12-09 1995-06-16 Microfil Ind Sa Guide tubulaire orientable, notamment pour un dispositif médico-chirurgical.
EP0764424A2 (fr) * 1995-09-22 1997-03-26 Mitsubishi Cable Industries, Ltd. Mécanisme de flexion et stéréoscope utilisant un tel mécanisme
DE19721030C1 (de) 1997-05-20 1998-12-17 Karlsruhe Forschzent Vorrichtung zum Führen einer medizinischen Sonde

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010034345A1 (de) * 2010-08-14 2012-02-16 Richard Wolf Gmbh Endoskopisches Instrument

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