WO2017098786A1 - Endoscope - Google Patents

Endoscope Download PDF

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Publication number
WO2017098786A1
WO2017098786A1 PCT/JP2016/079063 JP2016079063W WO2017098786A1 WO 2017098786 A1 WO2017098786 A1 WO 2017098786A1 JP 2016079063 W JP2016079063 W JP 2016079063W WO 2017098786 A1 WO2017098786 A1 WO 2017098786A1
Authority
WO
WIPO (PCT)
Prior art keywords
light guide
guide fiber
fiber bundle
bending
insertion portion
Prior art date
Application number
PCT/JP2016/079063
Other languages
English (en)
Japanese (ja)
Inventor
敏弘 山下
素啓 黒田
Original Assignee
オリンパス株式会社
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 オリンパス株式会社 filed Critical オリンパス株式会社
Priority to JP2017525997A priority Critical patent/JP6257854B2/ja
Publication of WO2017098786A1 publication Critical patent/WO2017098786A1/fr

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    • 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
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
    • G02B23/24—Instruments or systems for viewing the inside of hollow bodies, e.g. fibrescopes

Definitions

  • the present invention relates to an endoscope in which a treatment instrument channel and a light guide fiber bundle are inserted into an insertion portion.
  • endoscopes are provided with various treatment tools using a treatment instrument inserted into a treatment instrument channel as necessary, by observing a target site in a subject by inserting a long and narrow insertion portion into a subject such as a body cavity. Used to perform treatments.
  • the insertion portion of this type of endoscope is provided with a distal end portion, a bending portion, and a flexible tube portion in order from the distal end side, so that an operator or the like can insert the insertion portion into the subject.
  • the bending portion can be bent in a desired direction by operating an operation knob or the like disposed in the operation portion of the endoscope while holding and pushing the flexible tube portion.
  • the light guide fiber bundle whose cross-sectional shape is deformed in this way tends to easily cause a fiber breakage or the like when an additional stress is generated due to the bending operation of the bending portion depending on the arrangement in the insertion portion. It is in.
  • the ratio of the area occupied by the treatment instrument channel in the insertion portion is larger than that of other built-in objects. Therefore, when the bending portion is bent while the treatment instrument is inserted into the treatment instrument channel, the light guide fiber is interfered with by the interference with the treatment instrument channel having increased hardness depending on the arrangement in the insertion section. There is a possibility that the possibility of a fiber breakage or the like becomes more remarkable due to a large movement of the bundle and the stress generated by the movement.
  • the present invention has been made in view of the above circumstances, and an endoscope that can achieve both reduction in diameter of the insertion portion and suppression of fiber breakage by appropriately arranging the light guide fiber bundle in the insertion portion.
  • the purpose is to provide.
  • An endoscope includes an insertion portion, a bending portion that is provided in the insertion portion and includes a plurality of bending pieces rotatably connected around a rotation axis, and is long in the bending portion.
  • a treatment instrument channel inserted into the insertion portion in a state eccentric from the central axis of the direction, and a first insertion portion inserted into the insertion portion in a state where a cross-sectional shape in the bending portion is deformed with respect to a circular shape.
  • the light guide fiber bundle, and the cross-sectional shape in the curved portion is deformed with respect to a circle so that the minimum width is larger than that of the first light guide fiber bundle, and more than the first light guide fiber bundle.
  • a second light guide fiber bundle inserted into the insertion portion in a state of being separated from the rotation shaft.
  • the perspective view which shows the structure of an endoscope The perspective view which shows the front-end
  • Sectional drawing which shows the front-end
  • the disassembled perspective view which shows a front-end
  • Explanatory drawing which shows the state at the time of inserting an insertion part into the upper lobe bronchus
  • FIG. 1 is a perspective view showing a configuration of an endoscope
  • FIG. 2 is a perspective view showing a distal end portion of an insertion portion
  • FIG. 3 is a cross-sectional view showing a distal end portion of the insertion portion.
  • 4 is an exploded perspective view showing the distal end portion main body, the treatment instrument channel, and each fiber bundle
  • FIG. 5 is an enlarged sectional view of the distal end portion
  • FIG. 6 is a sectional view taken along line VI-VI in FIG. 3
  • FIG. 3 is a sectional view taken along line VII-VII
  • FIG. 8 is a sectional view taken along line VIII-VIII in FIG. 3
  • FIG. 9 is an explanatory view showing a state when the insertion portion is inserted into the upper lobe bronchus.
  • An endoscope 1 shown in FIG. 1 is, for example, an endoscope for bronchi (bronchoscope).
  • the endoscope 1 includes a long insertion portion 2 that can be inserted into a target site such as a bronchus in a subject, an operation portion 3 that is connected to the proximal end side of the insertion portion 2, and a side of the operation portion 3. And a universal cord 4 extending from the section.
  • the operation unit 3 has an operation unit main body 10 constituting an operation gripping unit, and a distal end side of the operation unit main body 10 is connected to a proximal end side of the insertion unit 2 through a bend preventing unit 11. Further, near the distal end of the operation unit main body 10, a treatment that serves as an opening on the proximal end side of a treatment instrument channel 31 (see FIGS. 2 to 8), which is a conduit for inserting the treatment instrument into the insertion portion 2. A tool insertion port 13 is provided. On the other hand, an angle lever 14 and switches 15 for various endoscope functions are provided near the proximal end of the operation unit main body 10.
  • the one end side of the universal cord 4 is connected to the side part of the operation part main body 10 via the bend preventing part 16.
  • a scope connector portion 20 is provided at the extended end which is the other end side of the universal cord 4.
  • a light source side connector 21 detachably attached to a light source device (not shown) is provided at the end of the scope connector unit 20.
  • the light source side connector 21 is provided with a proximal end portion of a light guide fiber bundle extending from the insertion portion 2 side, and an electrical contact 22 is provided.
  • an electrical connector 23 detachably attached to a video processor (not shown) is provided on the side of the scope connector unit 20.
  • the insertion portion 2 includes a distal end portion 5, a bendable bending portion 6 disposed on the proximal end side of the distal end portion 5, and a proximal end side of the bending portion 6.
  • a long and flexible flexible tube portion 7 is connected in order from the tip.
  • the distal end portion 5 is made of a metal tip portion main body 25 having a substantially columnar shape, and a metal shape having a substantially cylindrical shape continuously provided on the base end side of the tip portion main body 25.
  • the most advanced bending piece 45a is made of a metal tip portion main body 25 having a substantially columnar shape, and a metal shape having a substantially cylindrical shape continuously provided on the base end side of the tip portion main body 25.
  • the distal end body 25 is provided with a channel port 26, an observation optical system holding hole 27, and a pair of upper and lower illumination optical system holding holes 28u and 28d.
  • the channel opening 26 which is the largest opening is disposed in the distal end portion body 25 in a state of being eccentric from the insertion axis O which is the central axis in the longitudinal direction of the insertion portion 2.
  • the pair of illumination optical system holding holes 28u and 28d are arranged along the outer periphery of the channel port 26 at a position sandwiching the observation optical system holding hole 27 vertically.
  • the treatment instrument channel 31 inserted into the insertion portion 2 is held in the channel port 26 on the proximal end side of the distal end portion main body 25.
  • the treatment instrument channel 31 of this embodiment includes a fluororesin layer 31a, an intermediate layer 31b, a blade 31c, and an exterior 31d in order from the inner peripheral side. It is composed of laminated multi-layered tubes.
  • a part of the outer layer side (for example, the blade 31c and the exterior 31d) is removed on the distal end side, and the region on the distal end side where a part of the outer layer side is removed in this way. It is inserted into the channel port 26. Accordingly, the distal end side of the treatment instrument channel 31 is held by the distal end portion body 25 and communicated with the channel port 26.
  • an observation optical system 29 for observing the subject is held in the observation optical system holding hole 27, and the illumination optical system holding holes 28u and 28d illuminate the inside of the subject.
  • Illumination optical systems 30u and 30d for holding are respectively held.
  • the distal end side of the image guide fiber bundle 32 as an optical image transmission member inserted into the insertion portion 2 is held in the observation optical system holding hole 27.
  • the image guide fiber bundle 32 of the present embodiment is basically inserted into the insertion portion 2 in a state surrounded by the outer tube 32a.
  • the region on the distal end side of the image guide fiber bundle 32 is partially exposed from the outer tube 32a, and the region exposed from the outer tube 32a is inserted into a hard pipe 35 made of stainless steel or the like, and further the observation optical system. It is inserted into the holding hole 27 (see FIGS. 4 to 6).
  • the distal end side of the image guide fiber bundle 32 is held by the distal end portion body 25 and optically connected to the observation optical system 29.
  • the distal ends of the pair of upper and lower light guide fiber bundles 33u and 33d inserted into the insertion portion 2 are held in the illumination optical system holding holes 28u and 28d, respectively.
  • the light guide fiber bundles 33 u and 33 d of the present embodiment are basically enclosed in the outer tube 33 ua and 33 da in the insertion portion 2. Is inserted.
  • the light guide fiber bundles 33u and 33d are partially exposed from the outer tubes 33ua and 33da, and the regions exposed from the outer tubes 33ua and 33da correspond to the illumination optical system holding holes 28u and 28u, respectively. 28d is inserted.
  • the distal ends of the light guide fiber bundles 33u and 33d are held by the distal end body 25 and are optically connected to the corresponding illumination optical systems 30u and 30d, respectively.
  • the light guide fiber bundles 33u and 33d of the present embodiment are combined into a single light guide fiber bundle on the proximal end side in the insertion portion 2, and then passed through the operation portion 3 to the universal cord 4
  • the light source side connector 21 is optically connected.
  • the configuration in which the hard pipe is covered only on the region where the outer tube 32a of the image guide fiber bundle 32 is removed is described.
  • the outer tubes 33ua and 33da of the light guide fiber bundles 33u and 33d are attached.
  • the removed area may be covered with a hard pipe having a diameter smaller than that of the outer tubes 33ua and 33da.
  • the bending portion 6 includes, for example, a first bending portion 40 that can be freely bent in two vertical directions in conjunction with a bending operation through the angle lever 14 of the operation portion 3, and a first bending portion 40. And a second bending portion 41 that is disposed on the proximal end side of the first bending portion 40 and passively bends by an external force.
  • the first bending portion 40 includes, for example, a plurality of metal bending pieces 45 having a substantially annular shape, and pivots 46 l and 46 r such as rivets that form pairs on the left and right sides. As shown, it has a curved structure 47 that is rotatably connected.
  • the most advanced bending piece 45a that constitutes the above-described distal end portion 5 is connected to the most distal end of the bending structure 47.
  • the most proximal end bending piece 45b positioned at the most proximal end of the bending structure 47 is fitted into the distal end side of the base 50 having a cylindrical shape, and is fixed by brazing or the like.
  • a pair of upper and lower wire guides 48 u and 48 d are provided on the inner periphery of the predetermined bending piece 45, and each wire guide 48 u and 48 d is connected to the angle lever 14.
  • Two bending operation wires 51u and 51d are inserted.
  • the distal ends of the bending operation wires 51u and 51d inserted through the wire guides 48u and 48d extend into the distal end portion 5 and are respectively provided by wire stoppers 52 provided on the inner periphery of the most advanced bending piece 45a. It is fixed. Then, when these bending operation wires 51u and 51d are pulled or relaxed by operating the angle lever 14, the first bending portion 40 can actively bend in the vertical direction. Yes.
  • the second bending portion 41 is a first flex made of a compression coil spring formed by, for example, spirally winding a strip-shaped spring steel made of stainless steel or the like. 55.
  • the outer periphery of the first flex 55 is covered with a cylindrical blade 56 formed by weaving a thin metal wire such as stainless steel.
  • the base end side of the base 50 is externally fitted to the distal end side of the first flex 55 and the blade 56 covered on the outer periphery thereof, and is fixed by brazing or the like.
  • first and second bending portions 40 and 41 the outer periphery of the bending structure 47 and the blade 56 is integrally covered with a first outer skin 57 made of, for example, a soft rubber or the like. ing. Note that the distal end side of the first outer skin 57 is liquid-tightly bonded and fixed to, for example, the outer peripheral portion of the distal end portion main body 25.
  • the treatment instrument channel 31 in which the distal end side body 25 holds the distal end region the treatment instrument channel 31 in which the distal end side body 25 holds the distal end region.
  • the image guide fiber bundle 32 and the light guide fiber bundles 33u and 33d are inserted.
  • the treatment instrument channel 31 is arranged in an eccentric state from the insertion axis O, similarly to the arrangement at the distal end portion 5. More specifically, the treatment instrument channel 31 of the present embodiment has one pivot portion (for example, the right pivot portion 46r) of the pivot portions 46l and 46r whose outer peripheral surfaces form a pair on the left and right, and It arrange
  • the treatment instrument channel 31 is arranged so that the center O1 is located on one side with a straight line connecting the pair of wire guides 48u and 48d as a boundary.
  • the image guide fiber bundle 32 and the light guide fiber bundles 33u and 33d are arranged in a gap formed by eccentricizing the treatment instrument channel 31. More specifically, the image guide fiber bundle 32 and the light guide fiber bundles 33u and 33d are arranged along the outer peripheral surface of the treatment instrument channel 31 so that the pair of upper and lower light guide fiber bundles 33u and 33d sandwich the image guide fiber bundle 32. Arranged in a row.
  • the image guide fiber bundle 32 and the light guide fiber bundles 33u and 33d are disposed on the other side with a straight line connecting the pair of wire guides 48u and 48d as a boundary.
  • the upper light guide fiber bundle 33u is disposed as a first light guide fiber bundle in the vicinity of the rotating shaft (left pivot portion 46l), and the lower light guide fiber bundle 33d is a second light guide fiber bundle. Are arranged at positions separated from the rotation shaft (left pivot portion 46l).
  • the outer tube 32a, 33ua, 33da is a flexible resin such as PTFE (polytetrafluoroethylene) so that the cross-sectional shape of the image guide fiber bundle 32 and the light guide fiber bundles 33u, 33d can be deformed. Consists of materials.
  • PTFE polytetrafluoroethylene
  • Each of the exterior tubes 32a, 33ua, and 33da is formed of PTFE or the like, so that the image guide fiber bundle 32 and the light guide fiber bundles 33u and 33d have a basic cross-sectional shape according to the shape of the gap. It is arranged in the first bending portion 40 in a state of being deformed with respect to a certain circular shape.
  • the lower light guide fiber bundle 33d arranged as a second light guide fiber bundle at a position separated from the rotation axis has a minimum width W2 due to the deformation of the lower light guide fiber bundle 33d as the first light guide fiber bundle. It is set to be relatively larger than the minimum width W1 due to the deformation of the upper light guide fiber bundle 33u disposed in the vicinity of the dynamic axis.
  • the light guide fiber bundles 33u and 33d of the present embodiment are constituted by fiber bundles having the same cross-sectional area so as to irradiate the illumination light of the same light amount from the illumination optical systems 30u and 30d. For this reason, the upper light guide fiber bundle 33u is flatly deformed with a larger deformation amount (collapse amount) than the lower light guide fiber bundle 33d in order to make the minimum width W1 smaller than the minimum width W2. .
  • the outer tube 33ua of the upper light guide fiber bundle 33u has the same flexibility as the outer tube 33da of the lower light guide fiber bundle 33d, or the outer tube
  • the tube it is more desirable that the tube be more flexible than the outer tube 33da.
  • the hardness adjustment of each of the outer tubes 33ua, 33da, etc. can be easily realized by adjusting the porosity when PTFE is used as a material, for example.
  • the outer tube 33ua of the upper light guide fiber bundle 33u can be made of PTFE having a porosity of around 40% in order to facilitate deformation.
  • the outer tube 33da of the lower light guide fiber bundle 33d is disposed adjacent to the lower wire guide 48d.
  • the lower light guide fiber bundle 33 d is prevented from moving over the lower wire guide 48 d while greatly deforming the cross-sectional shape thereof, and thus has a predetermined flexibility. It is desirable to have a certain degree of hardness while ensuring the above.
  • the outer tube 33da of the lower light guide fiber bundle 33d is preferably made of PTFE having a porosity of around 15%.
  • the treatment instrument channel 31, the image guide fiber bundle 32, and the light guide fiber bundles 33u and 33d are arranged in the first bending portion 40.
  • the upper and lower light guide fiber bundles 33u and 33d have their minimum widths in the second bending portion 41 which is a passive bending portion without the pivot portions 46l and 46r. Are deformed so as to be equivalent to each other (that is, to have the same amount of crushing).
  • the flexible tube portion 7 has a second flex 58 made of a compression coil spring formed by, for example, spirally winding a strip-shaped spring steel made of stainless steel or the like.
  • the outer periphery of the second flex 58 is covered with, for example, a blade 56 extending from the second bending portion 40 side.
  • the outer periphery of the blade 56 is covered with a second outer skin 59 made of a tube made of, for example, a resin having a predetermined hardness.
  • the distal end side of the second outer skin 59 is, for example, liquid-tightly bonded and fixed to the outer periphery of the proximal end side of the first outer skin 57, and the proximal end side of the second outer skin 59 is not bent. It extends inside the portion 11.
  • the second flex 58 is made of spring steel integrated with the first flex 55.
  • the flexible tube portion 7 has a bending rigidity relatively higher than that of the second bending portion 41 by the second skin 59.
  • the bending stiffness of the endoscope 1 changes at the boundary between the second bending portion 41 and the flexible tube portion 7 in the insertion portion 2.
  • Such a boundary portion where the bending rigidity changes abruptly may cause a buckling deformation in the middle of the insertion portion 2 when it reaches a bent portion on a pipe line having a large bending angle.
  • a buckling deformation occurs in the insertion portion 2, the force is dispersed at the buckled portion, so that even if the insertion portion 2 is further pushed in, further advancement may be difficult.
  • the endoscope 1 of the present embodiment is configured so that the second bending portion 41 and the flexible tube portion in the insertion portion 2 are provided so as to prevent buckling of the insertion portion 2 and realize insertion as far as possible to the periphery. 7 is optimized.
  • the endoscope 1 which is a bronchoscope, has a second portion from the distal end of the insertion portion 2 to prevent buckling when the insertion portion 2 is inserted into the bronchus of the upper lobe.
  • the length to the boundary between the bending portion 41 and the flexible tube portion 7 is optimized.
  • the primary branch 101 toward the upper lobe is bent at the largest bending angle (about 60 °). Therefore, in order to advance the insertion portion 2 further to the distal end than the primary branch 101, the distal end side of the insertion portion 2 is set in a direction opposite to the insertion direction on the hand side while preventing buckling in the primary branch 101. It needs to be advanced.
  • the insertion part 2 when the insertion part 2 is inserted, assuming that the bronchial diameter can be expanded to about twice the normal time, and considering the deepest position where the insertion part 2 can be inserted based on bronchial anatomy data, For example, the insertion portion 2 having a tip 5 having a diameter of 3 mm can be inserted up to the ninth branch 109 having a bronchial diameter of about 1.5 mm in terms of anatomy.
  • the distance from the upper trunk entrance to the upper branch side ninth branch 109 is about 81 mm.
  • the length L from the distal end of the insertion portion 2 to the boundary between the second bending portion 41 and the flexible tube portion 7 is set to 81 mm or more. As described above, since the maximum distance that can be inserted into the bronchus depends on the outer diameter of the distal end portion 5, it is desirable that the length L be appropriately changed according to the outer diameter of the distal end portion 5.
  • the length L needs to be increased.
  • the treatment instrument channel 31 is disposed in the first bending portion 40 including the plurality of bending pieces 45 that are rotatably connected around the rotation shafts (the pivot portions 46l and 46r).
  • the light guide fiber bundles 33u and 33d whose cross-sectional shape is deformed with respect to a circle are arranged in a gap formed by decentering the insertion axis O, and the treatment instrument channel 31 being decentered.
  • each light guide fiber bundle 33u has a relationship in which the minimum width W2 of the light guide fiber bundle 33d arranged away from the rotation axis is larger than the minimum width W1 of the light guide fiber bundle 33u arranged in the vicinity of the moving axis. , 33d can be used to prevent excessive internal stress from occurring in a specific light guide fiber bundle and to effectively suppress fiber breakage.
  • the pair of upper and lower light guide fiber bundles 33u and 33d have the same cross-sectional area.
  • the required illumination light characteristics and the inside of the first bending portion 40 are described.
  • the cross-sectional areas of the light guide fiber bundles 33u and 33d can be set unequal, depending on the shape of the gaps in FIG.
  • FIG. 11 illustrates a case where three light guide fiber bundles 34 u, 34 m and 34 d are arranged in the first bending portion 40.
  • each light guide fiber bundle 34u, 34m, 34d is deformed so that the minimum width of the light guide fiber bundle 34u is the smallest and the minimum width of the light guide fiber bundle 34d is the largest.
  • the light guide fiber bundle 34u positioned relatively near the rotation axis corresponds to the first light guide fiber bundle
  • the light guide fiber bundle 34 m corresponds to the second light guide fiber bundle.
  • the light guide fiber bundle 34m relatively positioned near the rotation axis corresponds to the first light guide fiber bundle
  • the light guide fiber bundle. 34d corresponds to the second light guide fiber bundle. It is desirable that the outer tubes 34ua, 34ma, 34da surrounding the light guide fiber bundles 34u, 34m, 34d are also more flexible as they are located near the rotation shaft.
  • the image guide fiber bundle 32 is used as an optical image transmission member.
  • the optical image transmission member may be a signal line for transmitting the captured optical image as an electrical signal.

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

Abstract

Dans une première section de flexion 40 comportant une pluralité de pièces de flexion 45 connectées de manière à pouvoir tourner autour de tiges rotatives (parties de tige du pivot 461, 46r), un canal d'instrument de traitement 31 est disposé dans un état décentré par rapport à un axe d'insertion O ; et des faisceaux de fibres de guidage de lumière 33u, 33d, les formes transversales desquelles sont déformées dans une forme circulaire, sont disposés dans un espace formé par le décentrage du canal d'instrument de traitement. La largeur minimale W1 du faisceau de fibres de guidage de lumière 33u située à proximité de la tige rotative est inférieure à la largeur minimale W2 du faisceau de fibres de guidage de lumière 33d séparé de la tige rotative.
PCT/JP2016/079063 2015-12-09 2016-09-30 Endoscope WO2017098786A1 (fr)

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JP2017525997A JP6257854B2 (ja) 2015-12-09 2016-09-30 内視鏡

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JP2015240464 2015-12-09
JP2015-240464 2015-12-09

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57120003U (fr) * 1981-01-20 1982-07-26
JP2000005128A (ja) * 1998-06-17 2000-01-11 Asahi Optical Co Ltd 内視鏡
WO2014168000A1 (fr) * 2013-04-12 2014-10-16 オリンパスメディカルシステムズ株式会社 Endoscope électronique

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001061775A (ja) * 1999-08-25 2001-03-13 Olympus Optical Co Ltd 内視鏡用送液具
JP2004049473A (ja) * 2002-07-18 2004-02-19 Pentax Corp 湾曲部を有する内視鏡
JP3854946B2 (ja) * 2003-05-30 2006-12-06 オリンパス株式会社 内視鏡
JP4959934B2 (ja) * 2004-10-29 2012-06-27 オリンパス株式会社 内視鏡
JP2010063628A (ja) * 2008-09-10 2010-03-25 Fujinon Corp 内視鏡

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57120003U (fr) * 1981-01-20 1982-07-26
JP2000005128A (ja) * 1998-06-17 2000-01-11 Asahi Optical Co Ltd 内視鏡
WO2014168000A1 (fr) * 2013-04-12 2014-10-16 オリンパスメディカルシステムズ株式会社 Endoscope électronique

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JPWO2017098786A1 (ja) 2017-12-07

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