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WO2019159508A1 - Couvercle d'extrémité distale et appareil d'insertion - Google Patents

Couvercle d'extrémité distale et appareil d'insertion Download PDF

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Publication number
WO2019159508A1
WO2019159508A1 PCT/JP2018/045084 JP2018045084W WO2019159508A1 WO 2019159508 A1 WO2019159508 A1 WO 2019159508A1 JP 2018045084 W JP2018045084 W JP 2018045084W WO 2019159508 A1 WO2019159508 A1 WO 2019159508A1
Authority
WO
WIPO (PCT)
Prior art keywords
cover
tip
distal end
modification
tip cover
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/JP2018/045084
Other languages
English (en)
Japanese (ja)
Inventor
山谷　高嗣
博之 橋本
健夫 鈴木
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.)
Olympus Corp
Original Assignee
Olympus Corp
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 Corp filed Critical Olympus Corp
Publication of WO2019159508A1 publication Critical patent/WO2019159508A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • 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
    • A61B1/012—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 characterised by internal passages or accessories therefor
    • A61B1/018—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 characterised by internal passages or accessories therefor for receiving instruments
    • 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 a distal end cover and an insertion device provided at the distal end portion of an endoscope in which a treatment instrument capable of performing high-frequency therapy or the like is used.
  • endoscopes that can observe organs in a body cavity and the like by inserting an elongated insertion portion into the body cavity are widely used.
  • an endoscope or the like in which a solid-state imaging device such as a charge coupled device (CCD) is provided at the imaging unit at the front or rear end of the endoscope insertion unit is used. It has been.
  • CCD charge coupled device
  • a signal output from an image sensor provided in the endoscope is converted into a video signal by an image processing apparatus which is an external device of an endoscope separate from an electronic endoscope, an external camera, etc., and is output to a monitor.
  • the electronic endoscope configured separately and the image processing apparatus are connected via an endoscope connector.
  • a distal end cover is disposed at the distal end portion of the insertion portion.
  • Japanese Patent Application Laid-Open No. 9-075295 discloses an endoscope technique in which the tip cover can be easily removed and there is no fear of reusing the used tip cover.
  • an endoscope may treat a diseased part in the body by deriving a high-frequency treatment tool from the distal end of the insertion part.
  • a high-frequency treatment tool from the distal end of the insertion part.
  • the tip cover that covers the tip portion of a conventional endoscope is deformed by an external force, the insulating property of the deformed portion is lowered, and high-frequency current from the high-frequency treatment tool may leak from the tip portion. was there.
  • the present invention has been made in view of the above circumstances, and improves the insulating property of the distal end portion of the insertion portion inserted into the body so that a high-frequency current may leak to the outside during treatment with the high-frequency treatment instrument.
  • An object is to provide a tip cover and an insertion device to prevent.
  • the distal end cover is a distal end cover that is attached to the distal end configuration portion provided at the distal end portion of the insertion portion that is inserted into the body, has electrical insulation, and is attached to and detached from the distal end configuration portion.
  • An insertion device is a distal end cover attached to a distal end configuration portion provided at a distal end portion of an insertion portion to be inserted into a body, and has electrical insulation, and is attached to and detached from the distal end configuration portion.
  • a front end cover including the first cover is attached to the front end of the insertion portion.
  • the side view which shows the structure of the endoscope of this invention The perspective view which shows the structure of the front-end
  • subjected Sectional drawing which shows the structure of the front-end
  • Sectional drawing which shows the structure of the front-end
  • the perspective view which shows the structure of the front-end
  • the exploded perspective view which shows the front-end
  • an aspect of an endoscope will be described as an example.
  • the drawings based on each embodiment are schematic, and the relationship between the thickness and width of each part, the thickness ratio of each part, and the like are different from the actual ones. It should be noted that the drawings may include portions having different dimensional relationships and ratios between the drawings.
  • the endoscope in the following description of the configuration will be described taking as an example a so-called flexible endoscope having a flexible insertion portion for insertion into an upper or lower digestive organ of a living body, but is not limited thereto.
  • the technique can also be applied to a so-called rigid endoscope having a hard insertion portion used for surgery.
  • FIG. 1 is a side view showing the configuration of the endoscope
  • FIG. 2 is a perspective view showing the configuration of the distal end portion of the insertion portion
  • FIG. 3 is a perspective view showing the configuration of the distal end portion with the distal end cover removed.
  • 4 is a partial cross-sectional view showing the configuration of the tip cover and the rubber cover
  • FIG. 5 is a cross-sectional view showing the configuration of the tip cover provided with the rubber cover
  • FIG. 6 shows the configuration of the tip portion to which the tip cover is attached.
  • FIG. 7 is a sectional view showing a configuration of the distal end portion to which the distal end cover is attached
  • FIG. 8 is a sectional view showing the distal end portion in a state where the high-frequency treatment instrument raised by the raising base is led out.
  • the endoscope 2 that is the insertion device of the present embodiment has an insertion portion 5 that is inserted into the body, an operation portion 6, and a universal cable 7.
  • the insertion portion 5 is an elongated long member that is inserted into the observation target site from the distal end side in the longitudinal axis direction.
  • the insertion portion 5 is configured by connecting a distal end portion 8, a bending portion 9, and a flexible tube portion 10.
  • the distal end portion 8 incorporates an illumination optical system including a light guide and an imaging optical system including an imaging device, and a distal end surface is provided with a suction port that also serves as a nozzle and a treatment instrument outlet (both are not provided here). (Illustrated).
  • the distal end portion 8 is provided with an observation window and an illumination window having a predetermined angle with respect to the insertion direction of the insertion portion 5, and serves as a direction conversion portion that raises the treatment instrument and converts it into the observation direction.
  • An elevator 42 that is a movable part is disposed.
  • the elevator 42 is connected to an elevator operating wire (hereinafter simply abbreviated as a wire) 41 as a pulling / relaxing member which is a long member inserted into the insertion portion 5 and the operation portion 6.
  • a wire 41 as a pulling / relaxing member which is a long member inserted into the insertion portion 5 and the operation portion 6.
  • the wire 41 is pulled and relaxed, the raising and lowering operation of the raising base 42 is performed. Note that the wire 41 is pulled or loosened by operating the elevator base operating lever 16.
  • the bending portion 9 is configured to be freely bent in, for example, four directions, up, down, left, and right.
  • the flexible tube portion 10 is a long and flexible tubular member.
  • the operation unit 6 includes a gripping portion 6a, the gripping portion 6a is connected to the proximal end portion of the insertion portion 5, and a treatment instrument insertion port 6b is provided.
  • the operation unit 6 is provided with a bending operation unit 11, an air / water supply button 13, a suction button 14, a cleaning tube attachment base 15, and the like. Further, the operation unit 6 is provided with a raising base operation lever 16 as an operation member.
  • the bending operation unit 11 includes a bending operation knob 11a for performing the bending operation of the bending unit 9 of the insertion unit 5, and a fixing lever 11b for fixing the bending operation knob 11a at a desired rotation position. .
  • the universal cable 7 is extended from the side surface of the operation unit 6. An end of the universal cable 7 is provided with an endoscope connector 30 connected to a light source device that is an external device.
  • the endoscope connector 30 has a signal transmission cable 33 extending from the side. On the other end side of the signal transmission cable 33, an electrical connector 34 connected to the video processor is provided.
  • the distal end portion 8 of the insertion portion 5 is provided with a distal end constituting portion 21 formed of a metal such as stainless steel.
  • a raising base 42 made of a metal such as stainless steel is rotatably disposed.
  • the distal end component 21 is provided with an observation window 22 and an illumination window 23 on one side surface orthogonal to the insertion axis X shown in FIG.
  • the tip component part 21 is provided with a nozzle 24 for supplying air and water toward the observation window 22 and the illumination window 23.
  • An insulating ring 28 which is a non-conductive first insulating member made of non-metal such as resin or ceramic, is provided on the outer periphery of the base end of the tip component 21.
  • the elevator 42 is rotatably provided and is pivotally supported by the tip component portion 21 by a rotation shaft 27.
  • the raising base 42 is connected to one side by a connecting body 43 formed by refracting the wire 41, and undulates around the rotation shaft 27 by a pulling / relaxing operation of the wire 41.
  • a tip cover 61 which is a first cover formed from a synthetic resin such as an elastic-plastic material having electrical insulation, is detachably attached to the tip constituent portion 21.
  • the tip cover 61 is mounted so as to cover the tip constituent portion 21.
  • the restriction convex part 64 provided on the inner peripheral surface of the tip cover 61 is engaged with the restriction concave part 25 formed in the tip constituent part 21. Thereby, the mounting position of the tip cover 61 to the tip constituent portion 21 is defined.
  • the front end cover 61 is an engaging portion formed on the inner peripheral portion of the convex locking pin 26 that is an engaging portion provided so as to protrude from the side portion of the tip constituting portion 21.
  • the stop recess 65 (see FIGS. 4 and 5) engages and is fixedly attached to the tip constituting portion 21.
  • the tip cover 61 has an opening 63 that exposes the observation window 22 and the illumination window 23 and leads out the treatment tool 100 that is raised and lowered by the raising table 42.
  • the front end cover 61 is formed with a step portion 66 in the circumferential direction inside the base end, and the step portion 66 is an elastic second cover having electrical insulation.
  • a ring-shaped rubber cover 62 as an insulating member 2 is adhered.
  • a rubber cover 62 that is an insulating member is disposed around the entire inner periphery of the base end of the tip cover 61.
  • the rubber cover 62 has a minimum inner diameter of approximately 14 mm or less, and is formed of rubber or the like that is softer than the tip cover 61.
  • the distal end cover 61 covers the insulating ring 28 provided on the outer periphery of the proximal end of the distal end configuration portion 21 when the proximal end portion is attached to the distal end configuration portion 21.
  • the entire circumference of the base end surface 62 a of the rubber cover 62 is in close contact with the entire circumference of the distal end surface 28 a of the insulating ring 28.
  • the rubber cover 62 is in a state of being kept watertight by being in close contact with the joint portion with the insulating ring 28.
  • the endoscope 1 configured as described above has a high-frequency current E that is generated at the distal end component during high-frequency treatment using a high-frequency treatment instrument 100 such as a high-frequency electric knife raised by a raising table 42. Even if it flows to 21, the rubber cover 62 of the tip cover 61 and the insulating ring 28 of the tip component 21 are in close contact with each other, and the possibility of flowing to the outside of the insertion portion 5 can be prevented.
  • the distal end cover 61 is formed of an elastic-plastic member even when an external force is applied to the proximal end portion, and is not easily deformed due to the thickness of the rubber cover 62, so that the rubber cover 62 and the insulating ring 28 are in close contact with each other. Is maintained.
  • the endoscope 1 is provided with the distal end configuration portion provided in the distal end portion 8 when the high-frequency treatment instrument 100 is led out from the distal end portion 8 of the insertion portion 5 to treat the affected area in the body.
  • the tip cover 61 that covers the member 21 can prevent the high-frequency current E from the high-frequency treatment instrument 100 from leaking outside from the tip portion 8 without lowering the insulation.
  • the endoscope 1 can improve the insulating property of the distal end portion 8 of the insertion portion 5 and prevent the possibility that the high-frequency current E leaks to the outside during the treatment with the high-frequency treatment instrument 100.
  • FIG. 9 is a partial cross-sectional view showing a joined state of the rubber cover to the tip cover of the first modification.
  • a concave circumferential groove 67 may be formed in a stepped portion 66 at the proximal end portion of the distal end cover 61, and the rubber cover 62 may be bonded to the circumferential groove 67.
  • the rubber cover 62 cannot remove
  • FIG. 10 is a partial cross-sectional view showing a joined state of the rubber cover to the tip cover of the second modified example.
  • irregularities 68 may be formed on the stepped portion 66 of the proximal end portion of the tip cover 61, and a rubber cover 62 having an outer peripheral surface similar to the irregularities 68 may be bonded. Thereby, it can be set as the structure which the rubber cover 62 cannot remove
  • FIG. 11 is a cross-sectional view showing the configuration of the tip portion to which the tip cover of the third modified example is attached.
  • the rubber cover 62 may be formed in two colors on the base end outer periphery of the tip cover 61. Further, a part of the rubber cover 62 may be exposed on the outer peripheral surface of the tip cover 61.
  • FIG. 12 is a cross-sectional view showing the configuration of the tip portion to which the tip cover of the fourth modified example is attached.
  • the rubber cover 62 may be provided at the proximal inner peripheral portion of the distal end cover 61 so that the inner peripheral surface 62 b is in close contact with the outer peripheral surface 28 b of the insulating ring 28 of the distal end constituting portion 21. .
  • FIG. 13 is sectional drawing which shows the structure of the front-end
  • an O-ring 69 that is in close contact with the entire periphery of the distal end surface 28 a of the insulating ring 28 may be provided on the inner peripheral portion of the proximal end of the distal end cover 61.
  • a locking recess 29 into which the O-ring 69 of the tip cover 61 is engaged is formed in the tip component portion 21 so that the tip cover 61 is mounted and fixed to the tip component portion 21. Also good.
  • FIG. 14 is a cross-sectional view showing the configuration of the tip end portion to which the tip cover of the sixth modified example is attached.
  • a convex portion 71 protruding in the inner diameter direction is provided at the distal end portion of the rubber cover 62, and a locking concave portion 29 into which the convex portion 71 is engaged is provided in the distal end constituting portion 21 instead of the locking pin 26.
  • the tip cover 61 may be mounted and fixed to the tip constituent portion 21.
  • FIG. 15 is a cross-sectional view showing the configuration of the tip end portion to which the tip cover of the seventh modified example is attached.
  • a convex portion 71 a that protrudes in the inner diameter direction is provided at the distal end portion of the rubber cover 62, and a protruding portion 72 that is formed symmetrically adjacent to the convex portion 71 a is formed on the inner peripheral surface of the distal end cover 61.
  • a locking recess 29 in which the protrusion 71 a and the protrusion 72 are engaged is formed in the tip component 21 instead of the locking pin 26 so that the tip cover 61 is attached and fixed to the tip component 21. It may be.
  • FIG. 16 is a cross-sectional view showing the configuration of the tip portion to which the tip cover of the eighth modified example is attached.
  • a protrusion 73 is formed on the inner peripheral surface of the tip cover 61, and a protrusion 74 covering the protrusion 73 is formed on the rubber cover 62, and this protrusion 74 is engaged.
  • a locking recess 29 may be formed in the tip component 21 instead of the locking pin 26 so that the tip cover 61 is mounted and fixed to the tip component 21.
  • FIG. 17 is a cross-sectional view showing the configuration of the tip end portion to which the tip cover of the ninth modification is attached. As shown in FIG. 17, a hole 81 that can accommodate a deformed rubber cover 62 is formed in the tip cover 61, and the locking pin 26 of the tip constituent portion 21 presses against the rubber cover 62 so that the tip cover 61 has a tip configuration. It may be attached and fixed to the portion 21.
  • FIG. 18 is a perspective view showing the configuration of the tip cover of the tenth modification
  • FIG. 19 is a cross-sectional view of the first form of the proximal end portion of the tip cover of the tenth modification
  • FIG. 20 is the tenth modification.
  • FIG. 21 is a sectional view of the third embodiment of the base end portion of the tip cover of the tenth modification
  • FIG. 22 is a sectional view of the tenth modification of the base end portion of the tip cover of the example.
  • FIG. 23 is a sectional view of the fourth embodiment of the proximal end portion of the distal end cover
  • FIG. 23 is a sectional view of the fifth embodiment of the proximal end portion of the distal end cover of the tenth modification.
  • the rubber cover 85 may be a tube body having a predetermined length. As shown in FIG. 20, a tapered surface 86 may be formed at the proximal end portion of the distal end cover 61. In addition, as shown in FIG. 21, the base end portion of the distal end cover 61 may be formed with a small diameter portion 87 that is slanted in the inner diameter direction.
  • the rubber cover 85 may protrude from the proximal end of the distal end cover 61.
  • the rubber cover 85 may be formed with a protruding portion 88 in close contact with the outer peripheral surface of the tip constituting portion 21 in the circumferential direction of the inner peripheral portion.
  • FIG. 24 is an exploded perspective view showing the distal end portion of the endoscope in which the visual field direction of the eleventh modified example is a direct view
  • FIG. 25 is a perspective view showing the distal end portion of the endoscope in which the visual field direction of the eleventh modified example is a direct view.
  • the technique described above exemplifies the configuration of the endoscope 1 in which the visual field direction is side view or perspective view.
  • the present invention is not limited to this, and as shown in FIGS.
  • the present invention can also be applied to an endoscope configuration in which the distal end cover 61 is attached to and detached from the distal end configuration portion 21 and the elevator base 42 as a movable portion is provided at the distal end portion 8.
  • the above-described endoscope 1 has a configuration including the raising base 42 for raising and lowering the treatment instrument.
  • the present invention is not limited to this, and a movable part that swings the treatment instrument or the like instead of the raising base 42 is provided. It is good also as a structure which has the rocking
  • the stated requirements can be deleted if the stated problem can be solved and the stated effect can be obtained.
  • the structure thus constructed can be extracted as an invention.
  • a tip cover and an insertion device that improve the insulation of the tip of the insertion portion inserted into the body and prevent the possibility of high-frequency current leaking to the outside during treatment with the high-frequency treatment tool. be able to.

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

Abstract

L'invention concerne un couvercle d'extrémité distale 61 monté sur une partie constituante d'extrémité distale 21 disposée au niveau d'une partie d'extrémité distale 8 d'une partie insertion 5 qui est insérée dans le corps, le couvercle d'extrémité distale 61 comprenant : un premier couvercle 61 qui est électriquement isolant et qui est détachable de la partie constituante d'extrémité distale 21 ; et un second couvercle annulaire 62 qui est électriquement isolant et qui est disposé au niveau d'une partie périphérique interne du premier couvercle 61, la totalité de la circonférence du second couvercle 62 étant étroitement fixée à une bague isolante 28 disposée au niveau d'une partie périphérique externe de la partie constituante d'extrémité distale 21.
PCT/JP2018/045084 2018-02-15 2018-12-07 Couvercle d'extrémité distale et appareil d'insertion Ceased WO2019159508A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2018024913 2018-02-15
JP2018-024913 2018-02-15

Publications (1)

Publication Number Publication Date
WO2019159508A1 true WO2019159508A1 (fr) 2019-08-22

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PCT/JP2018/045084 Ceased WO2019159508A1 (fr) 2018-02-15 2018-12-07 Couvercle d'extrémité distale et appareil d'insertion

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11244219A (ja) * 1998-03-06 1999-09-14 Olympus Optical Co Ltd 内視鏡湾曲部保護装置
JP2003093324A (ja) * 2001-09-25 2003-04-02 Fuji Photo Optical Co Ltd 内視鏡カバー
JP2003102669A (ja) * 2001-09-28 2003-04-08 Fuji Photo Optical Co Ltd 内視鏡カバー
JP2009508629A (ja) * 2005-09-21 2009-03-05 ボストン サイエンティフィック リミテッド キャップとカバーを有する内視鏡組立体
JP2010253110A (ja) * 2009-04-27 2010-11-11 Hoya Corp 内視鏡カバーおよび内視鏡装置
WO2017006705A1 (fr) * 2015-07-06 2017-01-12 オリンパス株式会社 Gabarit de retrait de capot pour endoscopes

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11244219A (ja) * 1998-03-06 1999-09-14 Olympus Optical Co Ltd 内視鏡湾曲部保護装置
JP2003093324A (ja) * 2001-09-25 2003-04-02 Fuji Photo Optical Co Ltd 内視鏡カバー
JP2003102669A (ja) * 2001-09-28 2003-04-08 Fuji Photo Optical Co Ltd 内視鏡カバー
JP2009508629A (ja) * 2005-09-21 2009-03-05 ボストン サイエンティフィック リミテッド キャップとカバーを有する内視鏡組立体
JP2010253110A (ja) * 2009-04-27 2010-11-11 Hoya Corp 内視鏡カバーおよび内視鏡装置
WO2017006705A1 (fr) * 2015-07-06 2017-01-12 オリンパス株式会社 Gabarit de retrait de capot pour endoscopes

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