WO2011032619A1 - Endoscope pourvu d'une région déformable - Google Patents

Endoscope pourvu d'une région déformable Download PDF

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Publication number
WO2011032619A1
WO2011032619A1 PCT/EP2010/004713 EP2010004713W WO2011032619A1 WO 2011032619 A1 WO2011032619 A1 WO 2011032619A1 EP 2010004713 W EP2010004713 W EP 2010004713W WO 2011032619 A1 WO2011032619 A1 WO 2011032619A1
Authority
WO
WIPO (PCT)
Prior art keywords
tube
grooves
double helix
endoscope
endoscope according
Prior art date
Application number
PCT/EP2010/004713
Other languages
German (de)
English (en)
Inventor
Gregor Kiedrowski
Patrick Scherr
Original Assignee
Olympus Winter & Ibe 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 Olympus Winter & Ibe Gmbh filed Critical Olympus Winter & Ibe Gmbh
Publication of WO2011032619A1 publication Critical patent/WO2011032619A1/fr

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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
    • A61B1/0058—Flexible endoscopes using shape-memory elements
    • 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
    • A61B1/04—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 combined with photographic or television appliances
    • A61B1/05—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 combined with photographic or television appliances characterised by the image sensor, e.g. camera, being in the distal end portion

Definitions

  • the invention relates to an endoscope having the features of the preamble of claim 1.
  • FIG. 9 Such an endoscope is described in US Pat. No. 5,941,818, FIGS. 8 and 9.
  • the double helix illustrated there in FIG. 9 is designed to be self-locking during bending, so that the shaft of the endoscope has permanently deformable properties in the area equipped with the double helix, ie it can be flexibly bent and then maintains the set shape in a self-retaining manner until it is bent again.
  • Such a construction is also called gooseneck.
  • an inner cable is arranged, which serves for the supply of a video camera and for the illumination and consists therefore of an electrical cable and an optical fiber cable.
  • CONFIRMATION COPY Diameter of the cable, the double coil thicker and, since it consists of two metal wires, also heavier, which affects handling.
  • the object of the present invention is therefore to improve the input mentioned endoscope construction in the area of the gooseneck in terms of susceptibility and handling.
  • an inner cable sits inside the double helix.
  • an outer cable is arranged outside the double helix laterally next to this. Problems with the proximity of the two cables are thereby reduced and the double helix can be designed with a smaller diameter, and thus lighter. Due to the arrangement under the outer protective tube, the outer cable is protected against damage.
  • the arrangement of the outer cable outside the double helix, between this and the protective tube, may damage the outer cable, e.g. through bruising, lead.
  • the features of claim 2 are provided.
  • the outer cable is housed protected.
  • the outer channel may be formed in a simple embodiment of the molding tube as a simple slot in this.
  • the molding tube is, according to claim 3, formed with a first, the double helix receiving lumen and a second, the outer cable receiving lumen. This ensures the protection of the outer cable and its proper installation.
  • the deformable shaft region forms an asymmetrical cross section which results in different bending resistance in different bending directions. This can interfere with handling, in particular irritate the operator.
  • these problems result from the fact that, in the asymmetrical cross-sectional construction of the molded tube, it is thicker in the peripheral area of the second lumen than in the opposite cross-sectional area.
  • the features of claim 4 are provided, with which the asymmetrical material thickness is compensated by corresponding asymmetrical elasticity properties, so that the molding tube, and thus the deformable region is uniformly bendable in all directions.
  • the different elastic properties may e.g. can be achieved by different material design on the one and on the other side of the Formschlau- Ches, however, are advantageously achieved according to claim 5 by the shape of the molding tube in the different depths grooves weaken the molding tube on the thicker side per se stronger and thus to a all sides equal bendable construction lead.
  • the protective tube is stiffened with wire. As a result, a selective impressions of the protective tube is avoided, which could lead to damage or blockages during bending movements.
  • the formation of the molded tube with grooves according to claim 5 can lead to the grooves to a certain sensitivity against lateral selective impressions or buckling of the protective tube, which can lead to injuries of the cable.
  • the features of claim 7 are provided.
  • the grooves in the grooves support the protective tube in the grooves and thus lead to improved protection.
  • the features of claim 8 are provided. If the ribs fill the grooves in cross-section without play, a very secure protection against lateral impressions results.
  • the features of claim 9 are provided.
  • the play in the axial direction between the ribs, which protrude inwardly from the inside of the protective tube, and the side walls of the grooves or the ribs, which are formed between the grooves of the molding tube, is important for a good flexibility of the shaft.
  • FIG. 3 is an axial section through the used in the construction of FIG. 2, self-locking double helix,
  • FIGS. 5 to 7 are sections along the lines 5 to 5, 6 to 6, and 7 to 7 in FIG. 4, an axial section corresponding to FIG. 4 through a variant of the embodiment of FIGS. 4 to 7 and FIG
  • FIG. 8 shows an endoscope 1 with a shaft 2, in which rigid sections 3 and 4 are connected by means of a region 5 which permanently deforms in the manner of a gooseneck.
  • the shaft 2 is passed through by an inner cable 6 and an outer cable 7.
  • the inner cable 6 may be a flexible cable with a plurality of conductors, e.g. from the proximal end, not shown, to the distal end of the shaft 2, not shown, and e.g. a distally located video camera connects to a proximally arranged control unit.
  • the outer cable 7 may e.g. be a flexible fiber optic cable with which a proximal lamp can emit light from the distal end of the shaft.
  • the permanently deformable region 5 of the shank can also be connected directly to the housings of the camera and the control unit, instead of the rigid sections 3 and 4.
  • the inner cable 6 is within a double helix 8, which, as shown in FIG. 3, consists of two nested helical wires, one of which has a round cross section and the other has a triangular cross section.
  • a double helix acts self-locking during bending, so that once a bend is set under certain holding forces is maintained.
  • the double helix 8 is surrounded by a molding tube 9, which is divided at one point with a slot 10 in which the outer cable 7 is arranged.
  • the slot 10 is covered to the outside by a protective tube 11 which surrounds the entire deformable region 5 in a protective manner.
  • the protective tube 11 may for example be stiffened with wire, for example with a circumferential wire helix. This prevents that when pressed from the outside, the outer cable 7 is damaged or by clamping the bending is impaired.
  • the construction is asymmetrical, since the outer cable in the peripheral region of the longitudinal slot 10 outside the Querterrorismsrnitte of the deformable region 5, is located. It may therefore come in a plane passing through the axis of the inner cable 6 and the axis of the outer cable 7, to different bending forces in one or the other direction. This can disturb the operating doctor and above all can be very distracting, which is inadmissible in medical operations.
  • the relatively thick molding tube 9 with different elasticity, or with different restoring forces are equipped, which are different in particular in the vicinity of the slot 10 as at a distance from this.
  • the Fonnunsymmetrie be compensated, so that the deformable region 5 is equally bendable in all directions.
  • the desired differences in elasticity may be due to differences in material, e.g. be achieved by a material gradient in the molding tube 9.
  • FIGS. 4-7 show a second embodiment of the bendable region 5. As far as possible, the same reference numerals are used.
  • Fig. 4 shows a side view.
  • the molding tube 9 is provided, which is surrounded by the protective tube 11.
  • the shaping tube 9 is equipped with two lumens, namely with a first lumen 12, larger ßeren diameter, which is intended to receive the double helix 8, which may be formed as well, as shown in FIGS. 2 and 3.
  • the wall of the molding tube 9 is substantially thicker than on the opposite side. This results in strong differences in bending towards the first lumen, or towards the second lumen.
  • the material of the molding tube 9 may be of uniform elasticity, since the unbalanced elasticity to compensate for the shape asymmetry is not achieved by material differences, but by differences in shape.
  • the molding tube 9 may e.g. consist of silicone throughout.
  • the molding tube 9 has outer grooves 14, which, as shown in FIG. 4, are introduced in the axial direction at a distance from the outside into the surface of the molding tube 9.
  • the grooves 14 are, as shown particularly in FIGS. 4 and 6, extending in the circumferential direction.
  • the grooves 14 are interrupted in the region of the second lumen 13. They begin next to this and extend around the circumference of the Forschlauches 9 around with different depth.
  • the grooves 14, as shown in FIGS. 5 and 6, are deeper in the region adjacent to the second lumen 13 than in the opposite region from the second lumen 13, where they go to zero depth.
  • the grooves 14 are particularly deep and on the opposite side, where the molding tube 9 is thinner, the grooves are flatter , This results in a total of a design that results in an equally good flexibility on all sides.
  • FIGS. 8-10 show an embodiment variant of the embodiment of FIGS. 4-7. Wherever possible, the same reference numbers are used.
  • FIG. 8 shows an oblique axial section through the illustrated shaft, corresponding to the line 8-8 in FIG. 10. Therefore, in FIG. 8 the area surrounding the second lumen 13 of the molded tube 9 can not be seen. It can be seen in Fig. 8 but very well the grooves 14 and the standing between them, outwardly projecting ribs 18 of the molding tube, which are very well visible in Fig. 6.
  • the grooves 14 are covered by the protective tube 11, of which in this embodiment, however, ribs 19 project inwardly into the grooves 14.
  • protective tube 11 and ribs 19 are integrally formed.
  • the ribs 19 of the protective tube 11 completely fill the grooves 14, seen in the cross-section of FIG. Impression of on the outside of the protective tube 11 at any point is so well intercepted and distributed. This results in optimal protection for lying in the lumens 12 and 13 cables.
  • Fig. 8 reveals, but there is a clear play between the ribs 19 of the protective tube 11 and the side walls of the grooves 14, which form the ribs 18 between them.
  • the grooves 18 and 19 thus support the outside and inside of the protective tube 11 everywhere from very precise. In this case, however, a longitudinal movement between the protective tube 11 and the molded tube 9 is permitted by the play between the ribs 18 and 19 to be recognized in FIG. 8.
  • bending the construction shown in Fig. 8 shifts between the outer protective tube 11 and the inner mold tube 9 are therefore allowed, so that there are very good undisturbed bending properties.

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  • 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 un endoscope (1) pourvu d'une tige (2), qui comprend dans une zone déformable de manière permanente (5) une double spirale (8) à verrouillage automatique entourant un câble interne (6). Ledit endoscope est caractérisé en ce qu'un câble externe (7) est disposé à l'extérieur de la double spirale (8), entre celle-ci et un tuyau de protection externe (11), dans une région périphérique limitée (10, 13).
PCT/EP2010/004713 2009-09-18 2010-08-02 Endoscope pourvu d'une région déformable WO2011032619A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200910041897 DE102009041897A1 (de) 2009-09-18 2009-09-18 Endoskop mit Verformbarem Bereich
DE102009041897.0 2009-09-18

Publications (1)

Publication Number Publication Date
WO2011032619A1 true WO2011032619A1 (fr) 2011-03-24

Family

ID=42985696

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2010/004713 WO2011032619A1 (fr) 2009-09-18 2010-08-02 Endoscope pourvu d'une région déformable

Country Status (2)

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DE (1) DE102009041897A1 (fr)
WO (1) WO2011032619A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0742026A1 (fr) * 1995-05-12 1996-11-13 Werner, Wolfgang, Dr. med. Endoscope, utilisé en particulier pour l'intubation trachéale
US5941818A (en) 1996-10-01 1999-08-24 Vista Medical Technologies, Inc. Endoscopic video camera with malleable support
WO2010028701A1 (fr) * 2008-09-09 2010-03-18 , Olympus Winter & Ibe Gmbh Laparoscope avec tige déplaçable

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5025778A (en) * 1990-03-26 1991-06-25 Opielab, Inc. Endoscope with potential channels and method of using the same
JP3498426B2 (ja) * 1995-05-16 2004-02-16 富士写真光機株式会社 内視鏡の可撓管
US20070066869A1 (en) * 2005-09-21 2007-03-22 David Hoffman Endoscopic assembly including cap and sheath

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0742026A1 (fr) * 1995-05-12 1996-11-13 Werner, Wolfgang, Dr. med. Endoscope, utilisé en particulier pour l'intubation trachéale
US5941818A (en) 1996-10-01 1999-08-24 Vista Medical Technologies, Inc. Endoscopic video camera with malleable support
WO2010028701A1 (fr) * 2008-09-09 2010-03-18 , Olympus Winter & Ibe Gmbh Laparoscope avec tige déplaçable

Also Published As

Publication number Publication date
DE102009041897A1 (de) 2011-03-31

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