WO2022191108A1 - 内視鏡および先端キャップ - Google Patents

内視鏡および先端キャップ Download PDF

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Publication number
WO2022191108A1
WO2022191108A1 PCT/JP2022/009644 JP2022009644W WO2022191108A1 WO 2022191108 A1 WO2022191108 A1 WO 2022191108A1 JP 2022009644 W JP2022009644 W JP 2022009644W WO 2022191108 A1 WO2022191108 A1 WO 2022191108A1
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WO
WIPO (PCT)
Prior art keywords
tip
endoscope
negative pressure
space
distal end
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/JP2022/009644
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English (en)
French (fr)
Japanese (ja)
Inventor
高志 原田
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.)
Fujifilm Corp
Original Assignee
Fujifilm 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 Fujifilm Corp filed Critical Fujifilm Corp
Priority to JP2023505530A priority Critical patent/JPWO2022191108A1/ja
Priority to DE112022000575.0T priority patent/DE112022000575T5/de
Publication of WO2022191108A1 publication Critical patent/WO2022191108A1/ja
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
    • 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
    • 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
    • A61B1/0008—Insertion part of the endoscope body characterised by distal tip features
    • A61B1/00094—Suction openings
    • 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
    • A61B1/0008—Insertion part of the endoscope body characterised by distal tip features
    • A61B1/00098—Deflecting means for inserted tools
    • 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
    • A61B1/0008—Insertion part of the endoscope body characterised by distal tip features
    • A61B1/00101—Insertion part of the endoscope body characterised by distal tip features the distal tip features being detachable
    • 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
    • A61B1/00131—Accessories for endoscopes
    • A61B1/00137—End pieces at either end of the endoscope, e.g. caps, seals or forceps plugs
    • 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
    • A61B1/015—Control of fluid supply or evacuation
    • 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
    • A61B1/00163—Optical arrangements
    • A61B1/00174—Optical arrangements characterised by the viewing angles
    • A61B1/00177—Optical arrangements characterised by the viewing angles for 90 degrees side-viewing
    • 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
    • A61B1/06—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 with illuminating arrangements
    • A61B1/0615—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 with illuminating arrangements for radial illumination
    • 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
    • G02B23/2476—Non-optical details, e.g. housings, mountings, supports

Definitions

  • the present invention relates to endoscopes and tip caps.
  • various treatment instruments are introduced from a treatment instrument introduction port provided in an operation section, and these treatment instruments are led out from a treatment instrument outlet opening at the distal end of an insertion section to be used for treatment.
  • a duodenoscope uses a treatment tool such as a guide wire or an imaging tube.
  • a treatment instrument needs to change the lead-out direction at the distal end in order to treat a desired position within the subject. Therefore, the distal end main body of the distal end portion is provided with an upright for changing the lead-out direction of the treatment instrument.
  • the treatment instrument outlet of the endoscope can also serve as a suction port, and by generating a negative pressure at the treatment instrument outlet, for example, cleaning liquid and residue in the subject are sucked from the treatment instrument outlet.
  • the tip cap is detachably attached to the tip body equipped with the stand, and the tip cap is removed after the procedure to improve cleaning performance.
  • Patent Documents 1 and 2 disclose that it is attached to a tip member provided with a riser of an insertion section of an endoscope to cover at least a part of the tip member and to expose the space in which the riser is accommodated to the outside.
  • a distal end cap for an endoscope having an exposed opening, a notch formed in the periphery of the opening on the distal side, and a thin portion connected to the notch and extending in the proximal direction. do.
  • the present invention has been made in view of such circumstances, and provides an endoscope and a tip cap that can reduce the burden on the operator without damaging the inner wall of the digestive tract when the endoscope is pulled out. intended to
  • the endoscope of the first aspect includes a distal end body provided on the distal side of an insertion section of the endoscope, a suction port provided in the distal end body, and a position facing the suction port attached to the distal end body.
  • a tip cap defining a space in the interior and having an opening for opening the space to the outside, wherein at least one of the tip cap and the tip body has a negative pressure in the space at a position different from the opening.
  • a negative pressure release portion is provided to release the .
  • the negative pressure release section is provided in the tip cap.
  • the opening is an opening that opens in a second direction perpendicular to the first direction, which is the longitudinal direction of the insertion portion of the endoscope.
  • the negative pressure releasing section is arranged on the distal surface portion provided on the distal end side of the distal cap in the first direction.
  • the negative pressure release portion is a through hole that communicates the space portion with the outside.
  • a groove communicating with the through-hole is formed on the outer surface of the tip cap.
  • the negative pressure release portion is a cut portion extending from the peripheral portion of the opening.
  • the suction port also serves as the outlet for treatment instruments.
  • the space portion is provided with a stand for changing the orientation of the treatment instrument drawn out from the treatment instrument outlet.
  • the tip cap is detachably attached to the tip body.
  • the distal end main body is provided with a communicating portion that communicates the space portion with the outside as a negative pressure releasing portion.
  • the tip body has an observation window and an illumination window on the end face facing the second direction orthogonal to the first direction, which is the longitudinal direction of the insertion portion of the endoscope.
  • the tip cap has an easily breakable portion.
  • a check valve is provided in the negative pressure release section.
  • the distal end cap of the fifteenth aspect is attached to a distal end portion main body provided on the distal end side of an endoscope insertion section, defines a space at a position facing a suction port provided in the distal end portion main body,
  • the tip end cap has an opening for opening to the outside, and a negative pressure releasing portion for releasing the negative pressure in the space is provided at a position different from the opening.
  • the operator's burden can be reduced without damaging the inner wall of the gastrointestinal tract when pulling out the endoscope.
  • FIG. 1 is a configuration diagram of an endoscope system equipped with an endoscope according to the first embodiment.
  • FIG. 2 is an enlarged perspective view of the tip including the first embodiment of the tip cap.
  • 3 is an assembled perspective view of the tip shown in FIG. 2.
  • FIG. 4 is a cross-sectional view of the first embodiment of the tip cap taken along a plane extending longitudinally and passing through the through hole.
  • FIG. 5 is a perspective view showing a modification of the first embodiment of the tip cap.
  • FIG. 6 is a perspective view showing a second embodiment of the tip cap.
  • FIG. 7 is a cross-sectional view of the second embodiment of the tip cap taken along a plane extending longitudinally and passing through the notch.
  • FIG. 8 is a perspective view showing a modification of the second embodiment of the tip cap.
  • FIG. 9 is an assembled perspective view of the endoscope of the third embodiment.
  • FIG. 1 is a configuration diagram of an endoscope system 12 including an endoscope 10 of the present invention.
  • the endoscope system 12 includes an endoscope 10 , an endoscope processor unit 14 and a display 18 .
  • the endoscope 10 is a side-viewing endoscope used as, for example, a duodenoscope.
  • the endoscope 10 includes an operation section 22 provided with an erecting operation lever 20, and an endoscope insertion section 24 connected to the operation section 22 and inserted into the subject.
  • the endoscope insertion section 24 is inserted into the subject through the oral cavity, and further through the esophagus, the stomach, and the duodenum.
  • a treatment tool (not shown) inserted into the endoscope insertion portion 24 is used to perform a predetermined examination or treatment of the duodenum.
  • the treatment instrument include biopsy forceps having a cup at the distal end thereof for collecting living tissue, an EST (Endoscopic Sphincterotomy) knife, an imaging tube, and the like.
  • the endoscope insertion section 24 extends along the longitudinal direction Ax from the proximal side to the distal side, and includes a flexible section 26, a curved section 28, and a distal section 30 in order from the proximal side toward the distal side. .
  • a detailed configuration of the tip portion 30 will be described later, but first, a schematic configuration of the tip portion 30 will be described.
  • FIG. 2 is an enlarged perspective view of the distal end portion 30.
  • the endoscope 10 (see FIG. 1) of the embodiment is a side-viewing endoscope used as, for example, a duodenoscope, and the distal end portion 30 of FIG. 2 has a configuration of a side-viewing endoscope. .
  • FIG. 3 is an assembled perspective view showing the configuration of the distal end portion 30 shown in FIG.
  • the tip section 30 has a tip section main body 32 and a tip cap 34 , and is configured by attaching the tip cap 34 to the tip section main body 32 .
  • the distal end main body 32 is provided on the distal end side of the endoscope insertion portion 24 (see FIG. 1), and the distal end main body 32 is provided with an upright 36 having a treatment instrument guide surface, which will be described later. 2 and 3 show a state in which the stand 36 is positioned at the laid down position.
  • FIGS. 2 and 3 show various contents disposed inside the endoscope insertion portion 24 of the endoscope 10 (see FIG. 1). Specifically, an operation is performed to change the treatment instrument channel 38 that guides the distal end of a treatment instrument (not shown) to the distal body 32 and the lead-out direction of the distal end of the treatment instrument that is led out from the distal body 32 .
  • An operation wire 40 and an air/water supply tube 42 are provided for this purpose.
  • an angle wire for changing the bending direction of the bending portion 28 (see FIG. 1), a signal cable for transmitting an image signal, and an illumination light are transmitted. Contents, such as a light guide, are provided.
  • a three-dimensional orthogonal coordinate system in three axial directions (X-axis direction, Y-axis direction, Z-axis direction) will be used for description.
  • the Z(+) direction points upward and the Z(-) direction points downward.
  • the X(+) direction points to the right, and the X(-) direction points to the left.
  • the Y(+) direction refers to the distal direction of the distal end portion 30 and the Y( ⁇ ) direction refers to the proximal direction of the distal end portion 30 .
  • the Y-axis direction including the Y(+) direction and the Y(-) direction is parallel to the longitudinal direction Ax of the endoscope insertion section 24 and means the first direction.
  • the Z-axis direction including the Z(+) direction and the Z(-) direction means the second direction
  • the X-axis direction including the X(+) direction and the X(-) direction means the third direction. do.
  • the operation unit 22 is configured in a substantially cylindrical shape as a whole.
  • the operating portion 22 has an operating portion main body 46 on which the erecting operation lever 20 is rotatably provided, and a gripping portion 48 connected to the operating portion main body 46 .
  • a base end portion of the portion 24 is provided via a bending stop pipe 50 .
  • the grasping portion 48 is a portion grasped by the operator when operating the endoscope 10 .
  • a proximal end of a universal cable 52 is connected to the operation unit main body 46 .
  • a connector device 54 is provided at the tip of the universal cable 52 .
  • the connector device 54 is connected to the endoscope processor device 14 .
  • the endoscope processor device 14 includes a light source device 15 and an image processing device 16 .
  • the light source device 15 includes a processor-side connector 15A to which the connector device 54 is connected.
  • a display 18 for displaying an image processed by the image processing device 16 is also connected to the image processing device 16 .
  • the connector device 54 and the processor-side connector 15A transmit illumination light, contactless power, image signals, etc. between the endoscope 10 and the endoscope processor device 14 (cable transmission is also possible).
  • the illumination light from the light source device 15 is emitted from the illumination window 74 (see FIG. 2) provided in the tip body 32 via a light guide (optical fiber cable, not shown).
  • An image signal of an image picked up by an imaging unit (not shown) within the observation window 76 is displayed as an image on the display 18 after being subjected to image processing by the image processing device 16 .
  • An air/water supply button 57 , a suction button 59 , a pair of angle knobs 62 , and an upright operation lever 20 are provided on the operation portion main body 46 .
  • the air/water supply button 57 is a button that can be pressed, and is connected to the air/water supply tube 42 and an air/water supply source (not shown). By operating the air/water supply button 57 , air is ejected from the air/water supply nozzle 58 through the air/water supply tube 42 from the air/water supply source. Further, by pressing the air/water button 57 , water is ejected from the air/water supply nozzle 58 through the air/water supply tube 42 from the air/water supply source.
  • the suction button 59 is connected between the treatment instrument channel 38 and a negative pressure source (not shown).
  • a negative pressure source not shown.
  • air is sucked from the suction port, which also serves as the treatment device outlet port 60, through the treatment device channel 38 by the negative pressure source.
  • body fluid such as blood can be sucked from the treatment instrument outlet 60 through the treatment instrument channel 38 .
  • the suction port may be provided separately from the treatment instrument lead-out port 60 .
  • a pair of angle knobs 62 are coaxially and rotatably provided on the operation unit main body 46 .
  • the pair of angle knobs 62 are connected to the proximal ends of the angle wires (not shown) connected to the bending portion 28 on the side opposite to the distal ends thereof.
  • the bending portion 28 is bent up, down, left, and right by pushing and pulling the angle wires by rotating the pair of angle knobs 62 .
  • the raising operation lever 20 is rotatably provided coaxially with the pair of angle knobs 62 in the operation portion main body 46 and is rotated by the hand of the operator holding the grip portion 48 .
  • a base end opposite to a distal end of an operation wire 40 integrally formed with the stand 36 is connected to the raising operation lever 20 via a link mechanism (not shown).
  • the operation wire 40 is pushed and pulled by the rotating operation of the raising operation lever 20, and the posture of the raising table 36 is displaced between the lying position and the standing position.
  • the tip portion 30 includes the tip portion main body 32 and the tip cap 34 detachably attached to the tip portion main body 32 .
  • the tip cap 34 defines a space 66 at a position facing the treatment instrument outlet 60 that is attached to the tip body 32 and functions as a suction port, as will be described later.
  • the tip body 32 is made of a metal material having corrosion resistance. As shown in FIG. 3, the tip body 32 has a pair of partition walls 68 and 70 protruding toward the Y(+) side. The partition walls 68 and 70 are arranged facing each other in the X-axis direction. When viewed from the Z(+) direction, the partition 68 is arranged on the X(-) side, and the partition 70 is arranged on the X(+) side.
  • An illumination window 74 and an observation window 76 are arranged on the Z(+) side of the partition wall 68, that is, on the end surface 68A facing the second direction.
  • the illumination window 74 and the observation window 76 are arranged adjacent to each other in the Y direction, with the illumination window 74 on the distal side and the observation window 76 on the proximal side.
  • the emission end of a light guide (not shown) is arranged inside the illumination window 74 .
  • the illumination window 74 can illuminate the Z(+) direction (second direction) side.
  • a photographing unit (not shown) is provided inside the observation window 76 .
  • the photographing unit photographs a subject present in the Z(+) direction (second direction) through the observation window 76 .
  • the imaging unit includes, for example, an imaging optical system (not shown) and a CMOS (complementary metal oxide semiconductor) or CCD (charge coupled device) imaging element (not shown).
  • An image signal of an object output from the imaging device is input to the image processing device 16 via a signal cable (not shown), connector device 54 and processor-side connector 15A. Thereby, the image of the subject is displayed on the display 18 .
  • the air/water nozzle 58 is provided on the base end side of the observation window 76 at a position on the Z(+) direction side of the partition wall 68 of the tip body 32 .
  • the air/water nozzle 58 and the air/water tube 42 are connected, and the air/water nozzle 58 jets air and water supplied from the air/water tube 42 toward the observation window 76 .
  • a treatment instrument lead-out port 60 is provided on the proximal end side of the distal end main body 32 .
  • the treatment instrument outlet 60 is connected to the treatment instrument channel 38, and the treatment instrument outlet 60 and the treatment instrument channel 38 allow withdrawal of the treatment instrument and suction of bodily fluids such as blood.
  • the stand 36 is arranged between the partition wall 68 and the partition wall 70 in front of the treatment instrument lead-out port 60 (front end side).
  • the stand 36 is rotatably supported by a rotating shaft (not shown) parallel to the Y-axis (third direction).
  • the operating wire 40 is passed through the wire channel 41 and connected to the stand 36 .
  • the standing table 36 rotates about the rotation axis between the standing position and the lying position.
  • the stand 36 changes the orientation of the treatment instrument drawn out from the treatment instrument outlet 60 .
  • the operation wire 40 is arranged, for example, on the partition wall 70 and connected to the stand 36 via a stand-up lever (not shown).
  • the tip end cap 34 has a substantially bottomed tubular shape with a closed tip side and an open base end side, and an internal space is formed.
  • a tip cap 34 is removably attached to the tip body 32 .
  • a space 66 is defined at a position facing the treatment instrument outlet 60 (suction port).
  • the stand 36 is arranged between a pair of partitions 68 and 70 .
  • the tip cap 34 includes a tubular portion 80 , an opening 81 formed in the tubular portion 80 , a tip surface portion 82 , and a through hole 83 provided in the tip surface portion 82 .
  • the tip cap 34 is made of an elastic material such as a rubber material such as fluororubber or silicone rubber, or a resin material such as polysulfone or polycarbonate.
  • the tubular part 80 has a substantially tubular shape and surrounds the treatment instrument outlet 60 and the partition walls 68 and 70 .
  • An opening on the base end side of the cylindrical portion 80 is provided with a protruding engaging portion (not shown) that engages with a groove-shaped engaged portion (not shown) formed in the distal end portion main body 32 .
  • the tip cap 34 is detachably attached to the tip portion main body 32 .
  • the opening 81 is an opening formed in a part of the cylindrical portion 80 and opens the space 66 to the outside.
  • the opening 81 opens in the Z(+) direction (second direction) when the tip 30 is viewed from the Z(+) direction side, and the space 66 and the end surface 68A of the partition wall 68 are separated from each other. expose. As a result, it is possible to lead the treatment instrument from the space 66 in the Z(+) direction, and to illuminate and photograph the subject.
  • the cylinder part 80 is opened by the opening part 81, and the cylinder part 80 does not need to be closed over the entire circumference. On the other hand, it is preferably a closed ring at the portion that engages the tip body 32 .
  • the tip surface portion 82 is connected to the cylindrical portion 80 and provided on the tip side of the tip cap 34 in the Y(+) direction (first direction).
  • the tip surface portion 82 covers the tip surface of the tip portion main body 32 on the Y(+) direction side.
  • the tip surface portion 82 and the tube portion 80 form the tip cap 34 as a whole into a substantially cylindrical shape with a bottom.
  • a through-hole 83 is provided in the tip surface portion 82 of the tip cap 34 at a position different from the opening 81 .
  • the through hole 83 communicates the space 66 with the outside, and functions as a negative pressure releasing portion that releases negative pressure in the space 66 as described later.
  • the through-hole 83 may be provided in the cylindrical portion 80 as long as it is located at a different position from the opening 81 .
  • the opening 81 is provided in the cylindrical portion 80 , it is preferably provided at a position not facing the partition walls 68 and 70 accommodated in the space portion 66 .
  • FIG. 4 is a diagram for explaining the function of a negative pressure release portion that releases the negative pressure in the space of the through hole.
  • the cross-sectional view of the distal end portion 30 extending along the longitudinal direction Ax and cut by a plane passing through the through hole is shown.
  • the tip cap 34 is attached to a position facing the treatment instrument outlet 60 (suction port) to define a space 66 .
  • a standing table 36 is arranged in the space 66 and rotates about a rotating shaft 39 between a standing position and a lying position. In FIG. 4, the stand 36 is in the laid down position.
  • the opening 81 of the tip cap 34 opens the space 66 to the outside toward the inner wall 91 of the digestive tract 90 .
  • the suction button 59 is pressed down, the air A in the space 66 is sucked from the treatment instrument outlet 60 (suction port) by the negative pressure source.
  • the negative pressure in the space 66 of the tip cap 34 increases.
  • the opening 81 and the inner wall 91 are close to each other, and the inner wall 91 is in the space of the distal end cap 34 as indicated by double lines. There is a risk of being unintentionally sucked into the portion 66 .
  • the suctioned inner wall 91 closes the opening 81 of the tip cap 34 , the negative pressure in the space 66 becomes higher, making it difficult for the inner wall 91 to separate from the opening 81 .
  • the tip cap 34 is often composed of a molded product using a plurality of molds.
  • a parting line is formed in some part of the tip cap 34 (the parting line is a filamentary projection generated on the mold matching surface).
  • the parting line is mainly formed on the edge of the opening 81 indicated by the circle, instead of on the outer peripheral surface of the tubular portion 80. As shown in FIG. The operator must be very careful not to pull out the endoscope 10 while using the suction function while the parting line is in contact with the inner wall 91 sucked into the space 66 .
  • a through hole 83 is formed in the tip face portion 82 to suppress the increase of the negative pressure in the space portion 66 and prevent the inner wall 91 from being sucked into the opening portion 81 .
  • the through hole 83 allows the space 66 and the outside of the tip cap 34 to communicate with each other. Therefore, even when the air A in the space 66 is sucked from the treatment instrument outlet 60 (suction port), for example, the air B is sucked into the space 66 from the inside of the gastrointestinal tract 90 through the through hole 83. . Since the negative pressure in the space 66 is released through the through hole 83, it is possible to suppress the negative pressure in the space 66 from increasing, and the through hole 83 functions as a negative pressure releasing portion.
  • the tip cap 34 even if the endoscope 10 is pulled out while being sucked, the inner wall 91 is prevented from being sucked into the space 66 by the negative pressure releasing portion. On the other hand, since a scratching force in the shearing direction is also suppressed, the operator's burden can be reduced when pulling out the endoscope 10 regardless of the presence or absence of the parting line.
  • the through hole 83 which is the negative pressure release portion, in the tip surface portion 82. It is possible to prevent the inner wall 91 from blocking the through-hole 83 and to allow the through-hole 83 to reliably function as a negative pressure releasing portion. It is preferable to provide a check valve in the through hole 83, which is the negative pressure release portion. By regulating the direction of the air B sucked from the through hole 83, the negative pressure inside the space 66 can be reliably released.
  • the tip cap 100 of the modified example of the first embodiment has grooves 84 communicating with the through holes 83 formed on the outer surface of the tip cap 100 .
  • the groove 84 does not pass through the tip cap 100 and is open to the outside.
  • the groove portion 84 is composed of a first groove portion 84A, a second groove portion 84B and a third groove portion 84C.
  • the first groove portion 84A is formed in the tip surface portion 82 and extends in the Z(-) direction from the through hole 83 as a starting point.
  • the second groove portion 84B is formed in the tip surface portion 82 and the cylindrical portion 80. As shown in FIG.
  • the second groove portion 84B extends in the X( ⁇ ) direction from the through hole 83 on the distal end surface portion 82 and further extends in the Y( ⁇ ) direction on the cylindrical portion 80 .
  • a third groove portion 84C is formed in the tip surface portion 82 and the tubular portion 80 .
  • the third groove portion 84C extends in the X(+) direction from the through hole 83 in the distal end surface portion 82, and further extends in the Y(-) direction in the tubular portion 80. As shown in FIG.
  • the tip cap 100 has the groove 84 , even if the tip side of the through hole 83 is blocked, the space 66 can communicate with the outside through the through hole 83 and the groove 84 .
  • the groove portion 84 can suppress deterioration of the function of the through hole 83 as a negative pressure releasing portion.
  • the endoscope of the second embodiment differs from the endoscope of the first embodiment in the shape of the tip cap.
  • a second embodiment of the tip cap is described with reference to FIGS.
  • Figure 6 is a perspective view of a second embodiment of the tip cap. In FIG. 6, the tip body 32 is omitted.
  • the tip cap 102 includes a tubular portion 80, an opening 81 formed in the tubular portion 80, and a tip surface portion 82, similarly to the tip cap 34 of the first embodiment.
  • the opening 81 opens in the Z(+) direction (second direction) to open the space 66 to the outside.
  • the tip cap 102 is further provided with a notch 85 extending from the peripheral edge of the opening 81 at a position separate from the opening 81 .
  • the cut portion 85 is provided in the tip surface portion 82 and extends in the Z(-) direction from the peripheral edge portion of the opening portion 81 as a starting point.
  • the notch 85 communicates the space 66 with the outside.
  • the tip cap 102 further includes an easily breakable portion 86.
  • the breakable portion 86 is a groove portion formed in the tip surface portion 82 and the tubular portion 80 and opens to the space portion 66 side. Therefore, the easily breakable portion 86 becomes a thin portion in the tip end cap 102 .
  • the easy-to-break portion 86 extends in the Z(-) direction from the notch 85 on the distal end surface portion 82, and further extends in the Y(-) direction on the tubular portion 80. As shown in FIG.
  • the distal end cap 102 When a force is applied in the direction (X(+) direction and X(-) direction) to widen the width of the cut portion 85, the distal end cap 102 is broken along the breakable portion 86, and the X(+) direction and the X(-) direction are applied. ) direction. As a result, the tip cap 102 can be easily removed from the tip body 32 (not shown). Since the tip cap 102 is broken along the breakable portion 86, the tip cap 102 is discarded without being reused.
  • FIG. 7 shows a cross-sectional view taken along a plane extending along the longitudinal direction Ax of the distal end portion 30 and passing through the cut portion.
  • the distal end cap 34 is attached to a position facing the treatment instrument outlet 60 (suction port) to define a space 66 .
  • the stand 36 is in the laid down position.
  • a notch 85 is formed in the distal end surface portion 82 of the distal end cap 34 so as to prevent the negative pressure in the space portion 66 from increasing and prevent the inner wall 91 from being sucked into the opening portion 81 .
  • the notch 85 allows the space 66 and the outside of the tip cap 34 to communicate with each other. Therefore, even if the air A in the space 66 is sucked from the treatment instrument outlet 60 (suction port), for example, the air B will flow from the inside of the gastrointestinal tract 90 (not shown) through the notch 85 into the space 66 .
  • the notch 85 may be formed in the tubular portion 80 of the tip cap 102 .
  • the position of the deepest part of the notch 85 in the Z-axis direction is preferably lower than the leading end 36A of the standing table 36 (the farthest position from the rotating shaft 39) in the lying down position. It is possible to prevent the cut portion 85 from being blocked by the inner wall 91 (not shown), and maintain the function of the cut portion 85 as a negative pressure release portion.
  • the height is determined by the size of the distance when the position opposite to the opening 81 is used as a reference.
  • the tip cap 104 is provided with a plurality of through holes 83 in addition to the notches 85, unlike the tip cap 102 of the second embodiment.
  • the through-holes 83 can be arranged along the Z-axis direction, for example, in an imaginary straight line connecting the notch portion 85 and the breakable portion 86 .
  • the notch 85 and the plurality of through holes 83 function as a negative pressure releasing portion that releases the negative pressure in the space 66 .
  • the endoscope of the third embodiment differs from the first and second embodiments in the shape of the tip body.
  • the tip body of the third embodiment will be described with reference to FIG.
  • FIG. 9 is an assembled perspective view of the tip
  • FIG. 9(A) is a perspective view of the tip body
  • FIG. 9(B) is a perspective view of the tip after the tip cap is attached to the tip body. be.
  • the tip body 33 includes a pair of partition walls 68 and 70 protruding toward the Y(+) side, and an end face 68A of the partition wall 68 in the Z(+) direction.
  • An illumination window 74 and an observation window 76 are provided.
  • a treatment instrument lead-out port 60 is provided on the proximal end side of the distal end portion main body 32 .
  • the stand 36 is arranged between a pair of partition walls 68 and 70 on the distal end side of the treatment instrument outlet 60 (suction port).
  • the tip body 33 is provided with a groove 79 in the Z(+) direction of the treatment instrument outlet 60 (suction port) and on the base end side of the tip body 33 .
  • the groove portion 79 is open in the Z(+) direction.
  • a tip cap 106 is attached to the tip body 33 .
  • the tip cap 106 includes a tubular portion 80 , an opening 81 formed in the tubular portion 80 , and a tip surface portion 82 .
  • the tip cap 106 does not have the through hole 83 and the notch 85 functioning as a negative pressure release portion.
  • a space 66 is defined at a position facing the treatment instrument outlet 60 (suction port).
  • the groove 79 formed in the tip body 33 is exposed without being blocked by the tip cap 106, and serves as a communicating portion that communicates the space 66 with the outside.
  • the air A in the space 66 is sucked from the treatment instrument outlet 60 (suction port) by the negative pressure source, and the negative pressure in the space 66 increases.
  • a groove 79 communicating with the space 66 and the outside is formed in the tip body 33 . Therefore, even when the air A in the space portion 66 is sucked from the treatment instrument outlet 60 (suction port), the air B, for example, from the inside of the gastrointestinal tract 90 (not shown) passes through the groove portion 79 which is the communicating portion. It is sucked into the space 66 . Since the negative pressure in the space 66 is released through the groove 79, which is the communicating portion, it is possible to prevent the negative pressure in the space 66 from increasing.
  • a groove portion 79, which is a communication portion functions as a negative pressure release portion.
  • the groove portion 79 serving as a communication portion functions as a negative pressure release portion
  • the communication portion is not limited to the groove portion 79 .
  • a through-hole formed in the tip body 33 can be used as a communicating portion and can function as a negative pressure releasing portion.
  • the first embodiment and the second embodiment show the case where the negative pressure release portion is formed in the tip cap, and the third embodiment shows the case where the negative pressure release portion is formed in the tip body.
  • the tip cap and the tip body can each be provided with a negative pressure release.

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PCT/JP2022/009644 2021-03-11 2022-03-07 内視鏡および先端キャップ Ceased WO2022191108A1 (ja)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024226708A1 (en) * 2023-04-26 2024-10-31 Boston Scientific Scimed, Inc. Dual-locking medical devices and related methods

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05305145A (ja) * 1992-05-06 1993-11-19 Olympus Optical Co Ltd 吸引プローブ
JPH0871034A (ja) * 1994-09-07 1996-03-19 Fuji Photo Optical Co Ltd 内視鏡先端部
JPH08117235A (ja) * 1994-10-20 1996-05-14 Fuji Photo Optical Co Ltd 超音波内視鏡の流体給排装置
JP2004255033A (ja) * 2003-02-27 2004-09-16 Pentax Corp 側視型内視鏡の先端部キャップ構造
WO2018101465A1 (ja) * 2016-12-02 2018-06-07 オリンパス株式会社 内視鏡の先端カバー
JP2018171257A (ja) * 2017-03-31 2018-11-08 富士フイルム株式会社 超音波内視鏡および超音波内視鏡用フード

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05305145A (ja) * 1992-05-06 1993-11-19 Olympus Optical Co Ltd 吸引プローブ
JPH0871034A (ja) * 1994-09-07 1996-03-19 Fuji Photo Optical Co Ltd 内視鏡先端部
JPH08117235A (ja) * 1994-10-20 1996-05-14 Fuji Photo Optical Co Ltd 超音波内視鏡の流体給排装置
JP2004255033A (ja) * 2003-02-27 2004-09-16 Pentax Corp 側視型内視鏡の先端部キャップ構造
WO2018101465A1 (ja) * 2016-12-02 2018-06-07 オリンパス株式会社 内視鏡の先端カバー
JP2018171257A (ja) * 2017-03-31 2018-11-08 富士フイルム株式会社 超音波内視鏡および超音波内視鏡用フード

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024226708A1 (en) * 2023-04-26 2024-10-31 Boston Scientific Scimed, Inc. Dual-locking medical devices and related methods

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