WO2004037075A1 - 内視鏡装置 - Google Patents
内視鏡装置 Download PDFInfo
- Publication number
- WO2004037075A1 WO2004037075A1 PCT/JP2003/013463 JP0313463W WO2004037075A1 WO 2004037075 A1 WO2004037075 A1 WO 2004037075A1 JP 0313463 W JP0313463 W JP 0313463W WO 2004037075 A1 WO2004037075 A1 WO 2004037075A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- endoscope
- diameter
- outer diameter
- flexible
- distal end
- Prior art date
Links
- 238000003780 insertion Methods 0.000 description 40
- 230000037431 insertion Effects 0.000 description 40
- 210000002429 large intestine Anatomy 0.000 description 17
- 210000001599 sigmoid colon Anatomy 0.000 description 17
- 238000005452 bending Methods 0.000 description 12
- 239000011347 resin Substances 0.000 description 10
- 229920005989 resin Polymers 0.000 description 10
- 239000000463 material Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 210000000436 anus Anatomy 0.000 description 6
- 238000005498 polishing Methods 0.000 description 4
- 210000004534 cecum Anatomy 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 230000035515 penetration Effects 0.000 description 3
- 210000001815 ascending colon Anatomy 0.000 description 2
- 210000001731 descending colon Anatomy 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 210000000952 spleen Anatomy 0.000 description 2
- 230000003393 splenic effect Effects 0.000 description 2
- 210000003384 transverse colon Anatomy 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 210000001072 colon Anatomy 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003631 expected effect Effects 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000002496 gastric effect Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 230000000968 intestinal effect Effects 0.000 description 1
- 210000004185 liver Anatomy 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 210000000664 rectum Anatomy 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- A61B1/00064—Constructional details of the endoscope body
- A61B1/0011—Manufacturing of endoscope parts
-
- 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
-
- 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
- A61B1/00078—Insertion part of the endoscope body with stiffening means
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/005—Flexible endoscopes
- A61B1/0051—Flexible endoscopes with controlled bending of insertion part
- A61B1/0055—Constructional details of insertion parts, e.g. vertebral elements
-
- 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
- A61B1/31—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 for the rectum, e.g. proctoscopes, sigmoidoscopes, colonoscopes
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
- H04N7/181—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast for receiving images from a plurality of remote sources
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/005—Flexible endoscopes
- A61B1/0051—Flexible endoscopes with controlled bending of insertion part
- A61B1/0052—Constructional details of control elements, e.g. handles
-
- 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
- A61B1/12—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 cooling or rinsing arrangements
Definitions
- the present invention relates to an endoscope apparatus capable of improving the penetration into the large intestine.
- a flexible portion having flexibility is provided at the insertion portion of the endoscope, and a distal end portion of the flexible portion is connected to a distal end of the flexible portion via a curved portion.
- An observation window, an illumination window, a treatment tool passage channel opening, and the like are provided on the distal end surface of the distal end portion as predetermined.
- the flexible portion can be easily flexibly bent by increasing the flexibility of the portion near the distal end, while the insertability is improved by reducing the flexibility of the portion near the proximal end. .
- the outer diameter of the flexible portion is gradually increased from the distal side to the proximal side, so that the outer diameter of the flexible portion is smaller than that of the portion closer to the distal side.
- a technique has been disclosed in which the flexibility of a portion near the proximal end is reduced to ensure flexibility near the distal end and to improve penetration.
- the outer diameter of the large-diameter portion provided in the flexible portion of each endoscope may be different from the endoscope. If there is a large difference between the endoscopes, the surgeon feels extreme discomfort when grasping the large-diameter portion of each endoscope, impairing the insertability.
- the present invention has been made in view of the above circumstances, and is used in one endoscope apparatus. It is an object of the present invention to provide an endoscope apparatus which does not cause an extremely uncomfortable feeling when an operator grasps a large diameter portion provided in a flexible portion of a plurality of endoscopes to be used. Disclosure of the invention
- the first aspect of the present invention includes a soft portion having a small-diameter portion provided on the distal end side and a large-diameter portion provided at a position closer to the hand than the small-diameter portion and having a larger outer diameter than the small-diameter portion.
- the endoscope can use the same light source device or video processor as the first endoscope, and the second endoscope and the flexible part having substantially the same outer diameter as the flexible part have substantially the same overall length.
- At least the outer diameter of the large diameter portion of the endoscope is substantially the same as or less than the outer diameter of the flexible portion of the second endoscope, and the outer diameter of the flexible portion of the third endoscope. Is substantially the same or more.
- FIG. 1 is an overall configuration diagram of an endoscope
- FIG. 2 is an enlarged view of a distal end side of an endoscope insertion portion
- FIG. 4A to 4C are explanatory views showing a process of forming a flexible tube to be attached to a flexible portion
- FIGS. 5A to 5D are other aspects.
- Fig. 6 is an explanatory view showing a process of forming a flexible tube to be adhered to a flexible part according to Fig. 6,
- Fig. 6 is an explanatory view showing a state where an index is printed on the surface of the flexible tube, and
- Figs. 7A to 7D are insertion sections of an endoscope.
- FIG. 4 is an explanatory diagram showing the state of the introduction into the large intestine for each state.
- FIG. 8 is a schematic configuration diagram of an endoscope apparatus according to the second embodiment.
- FIG. 9 is an enlarged view of the distal end portion of the endoscope according to the third embodiment.
- 1 to 7D show a first embodiment of the present invention.
- the endoscope 1 has an insertion section 2 having a solid-state image pickup device such as a CCD built in at the distal end, and is connected to a base end side of the insertion section 2 so that an observer can grasp and perform various operations.
- An operation unit 3 for performing operation and a universal code 4 extending from the operation unit 3 are provided.
- the connector part 5 is provided at the end of the universal cord 4.
- the connector section 5 is provided with a light guide connector 6, a camera connector 7, and the like.
- the light guide connector 6 and the camera connector 7 are connected to peripheral devices such as a light source device and a camera control unit.
- the insertion portion 2 includes a distal end portion 8, a bendable bending portion 9, and a flexible portion 10 having flexibility from the distal end side.
- the base end of the flexible portion 10 is connected to the operation portion 3. Have been.
- an observation window, an illumination window, a treatment instrument communication channel opening, an air supply / water supply nozzle, and the like are provided on the distal end surface of the distal end portion 8 in a predetermined manner.
- the operation section 3 includes a bending operation lever 11 for remotely controlling the bending operation of the bending section 9, a treatment tool inlet 12 for inserting a treatment tool such as forceps, an image freezing / releasing, and the like.
- a plurality of switches 13 and the like for performing the operation are provided.
- the flexible portion 10 is provided on the distal end side and has a small-diameter portion 10 a having substantially the same outer diameter over the entire length, and is provided on the hand side of the small-diameter portion 10 a.
- the large-diameter portion 10b having an outer diameter larger than the small-diameter portion 10a and the tapered portion 10c that smoothly connects the small-diameter portion 10a and the large-diameter portion 10b.
- the boundary between the small diameter portion 10a and the tapered portion 10c is indicated by an arrow A
- the boundary between the tapered portion 10c and the large diameter portion 10b is indicated by an arrow B.
- the length from the distal end surface of the distal end portion 8 which is the distal end of the insertion portion 2 to the position of the rear end of the small-diameter portion 10a indicated by the arrow A is 30 cm, 40 cm, 50 cm, or the like. There are various types depending on the size, but usually there is no one that reaches 70 cm. Therefore, the rear end of the small-diameter portion 10a indicated by the arrow A is disposed forward of 70 cm from the front end surface of the front end portion 8.
- FIG. 3 schematically shows a part of the internal structure of the flexible portion 10.
- the flexible tube 20, which is the outer shell of the flexible portion 10, includes spiral tubes 21a and 21b, whose winding directions are opposite to each other, a reticulated tube 22, and a sheath resin 24, from the inside. are doing.
- the helical tubes 21a, 21b, and the mesh tube 22 have substantially constant inner and outer diameters over their entire length, and by changing the thickness of the outer sheath resin 24, the narrow diameter portion 10a A large diameter portion 10b and a tapered portion 10c connecting them are formed. Note that, in the present embodiment, the force S in which the spiral tubes 21a and 21b have two layers, the spiral tube may have one layer or three or more layers.
- the spiral tube 21 a, 21 b and the mesh tube 22 assembled in a predetermined manner are used as a core, and the skin resin 24 is extruded to form a mesh tube.
- the skin resin 24 is extruded to form a mesh tube.
- the small-diameter portion 10a, the tapered portion 10c, and the large-diameter portion 10b are formed by changing the drawing speed of the core die.
- the small-diameter portion 10a is formed by increasing the core mold drawing speed
- the large-diameter portion 10b is formed by decreasing the core mold drawing speed
- the taper portion 10c is formed by continuously changing the drawing speed from 10a to the large diameter portion 10b or from the large diameter portion 10b to the small diameter portion 10a.
- a rod manufactured with a single outer diameter By performing centerless polishing using a plurality of tapered polishing grindstones 23 on the flexible tube material 20, the small diameter portion 10 a and the tapered portion 10 c are formed. Outer diameters of 10a to 10c can be formed with high accuracy.
- a flexible tube material 20 ′ having the same outer diameter as the large-diameter portion 10 b is provided with a plurality of tapered grinding wheels arranged on the circumference.
- the flexible tube material 20 ′ is pressed relatively to the plurality of tapered abrasive grindstones 23, as shown in FIG. 4B.
- the surface of the flexible tube material 20 is polished into a shape following the plurality of tapered abrasive grindstones 23, and as shown in FIG. a and the tapered portion 10 c are formed in a predetermined manner.
- the small diameter portion 10a, the tapered portion 10c, and the large diameter portion 10b can be formed with high precision.
- the small-diameter portion 10a, the tapered portion 10c, and the large-diameter portion 10b can be formed with high precision by extrusion as shown in FIGS. 5A to 5D.
- the spiral tube 21a, 21b, the reticulated tube 22, the first shell resin 24a, and the entire outer diameter is small.
- a flexible tube material 20 ′′ with the same dimensions as the part 10 a was manufactured by extrusion, and then, as shown in FIG. 5B, a heat-shrinkable tube was added to the part corresponding to the small-diameter part 10 a. Then, as shown in FIG. 5C, extruding is performed again by changing the dice, and the flexible tube material 20 ′ ′ is formed following the tube body 25 as shown in FIG. 5C.
- a second outer shell resin 24b having the same outer diameter as the large diameter portion 10b is formed on the outer periphery.
- the tube body 25 is peeled off from the flexible tube material 20 and removed, and corresponds to the tapered portion 10c of the second outer sheath resin 24b.
- the portion is polished by a polishing machine or the like as shown by a broken line, so that a small diameter portion 10a, a tapered portion 10c, and a large diameter portion 10b as shown in FIG. 2 or FIG. 3 can be provided.
- a flexible tube 20 is formed.
- the flexible tube 20 is heated, and the first outer resin 24a, the second outer resin 24b, and the mesh tube 22 are heat-welded to each other so that the members are securely adhered to each other. .
- an index 26 may be printed on the surface of the flexible tube 20 and a thin film top coat 27 may be coated thereon.
- a thin film top coat 27 may be coated thereon.
- the tapered portion 10c is formed at a position of about 43 to 48 cm from the tip surface.
- the small diameter portion 10a has such a length that it can be bent by 180 ° or more as shown by the broken line in FIG. 2 when it is bent with the minimum radius.
- the minimum radius means that when the small diameter portion 10a is naturally curved, one of the helical tubes 21a and 21b shown in FIG. Refers to a state where it cannot be bent any further.
- 7A to 7D show a state in which the insertion section 2 of the endoscope 1 according to the present embodiment is inserted into the large intestine.
- the large intestine mainly consists of the anus 28, the rectum 29, the sigmoid colon 30, the descending colon 31, the splenic curve 32, the transverse colon 33, the liver curve 34, the ascending colon 35, and the cecum 36.
- FIG. 7A shows a state where the insertion portion 2 of the endoscope 1 is inserted into the sigmoid colon 30.
- the sigmoid colon 30 is the most complicated and tortuous in the large intestine, and is soft and mobile.
- the insertion member 2 is inserted into the shape of the sigmoid colon 30 while moving along the shape thereof to some extent, it is desirable that the distal end side of the flexible portion 10 is as soft as possible and curved as small as possible. Therefore, when inserting into a complicated and tortuous site such as the sigmoid colon 30, a small-diameter portion 10 a is formed at the distal end of the flexible portion 10 like the endoscope 1 shown in the present embodiment. This allows the insertion portion 2 to be guided smoothly even in a complicated and winding portion such as the sigmoid colon 30.
- the distal end 8 of the insertion portion 2 is advanced further from the spleen curve 32.
- the entire insertion portion 2 moves in the advancing direction and the flexible portion 10 is radiused, so the length is shortened.
- the straightened sigmoid colon 30 is restored. Try to restore to the meandering shape of.
- the endoscope end 8 enters the splenic curve 32, shortening and straightening the sigmoid colon 30, and the length from the anus 28 to the endoscope end 8 is reduced. It is about 40-45cm, "Total coronoscopic scoping by right-handed operation and right and left colon bending.” (Gastrointestinal Endoscope Vol. 5 No. 5 1
- the flexible portion 10 in the anus 28 may be approximately 60 to 70 cm from the endoscope end portion 8. It is known from the above-mentioned documents.
- the flexible portion 10 is made thicker at the proximal side to make it harder to bend, and it is possible to twist the required amount with less force.
- such a twisting operation by the operator can be performed at the distal end of the endoscope.
- at least a part of the tapered portion 10c must be at least partially 70cm ahead of the distal end 8 of the endoscope.
- Part 10b hardly enters the large intestine, and the expected effect cannot be obtained. Therefore, by setting at least a part of the tapered portion 10c ahead of a position 70 cm from the distal end surface of the endoscope distal end portion 8, the endoscope distal end portion 8 is located in the large intestine in most patients.
- the tapered portion 10c and the large-diameter portion 10b can penetrate into the shortened sigmoid colon 30 when penetrated deeper into the sigmoid colon 30.
- the restoring operation of the sigmoid colon 30 to return to the original shape can be prevented.
- the twisting operation can be easily performed, and the twisting operation can be easily performed. It becomes easier to reach 8.
- the tapered portion 10c that continuously connects the small-diameter portion 10a on the distal end side provided in the flexible portion 10 and the large-diameter portion 10b on the proximal side is formed at the endoscope distal end.
- the operability during insertion of the endoscope can be improved by optimally setting the position where the tapered portion 10c is formed, for example, by setting it 45 cm or 70 cm forward from the distal end surface of the portion 8.
- FIG. 7D shows a state where a part of the sigmoid colon 30 is sharply bent. As shown in FIG. 7D, when the intestinal walls are sharply bent to abut (or adhere) to each other, the bending angle of the bent portion reaches a maximum of about 180 °.
- the bending portion 9 can be bent to about 180 °, and
- the small-diameter portion 10a which is the distal end of the flexible portion 10 provided continuously to the curved portion 9, is also naturally curved as much as possible by 180 ° up to 180 °. Is desirable.
- the small-diameter portion 10a when the small-diameter portion 10a is bent with a minimum radius, the small-diameter portion 10a has a length sufficient to be bent by 180 °. It can be passed relatively easily.
- the tapered portion 10c and the large diameter portion 10b are harder than the small diameter portion 10a. Therefore, if the small-diameter portion 10a is too short, the flexible portion 10 cannot be bent to 180 °, making it difficult to pass through the sharply bent portion in the large intestine.
- the sharpest bent portion can be passed relatively easily.
- the insertability of the endoscope insertion section 2 is improved.
- FIG. 8 shows a second embodiment of the present invention.
- an endoscope device 41 shown in the present embodiment includes a plurality of endoscopes 1A, 1B, 1C having different functions, and endoscopes 1A, IB, A light source device 42, a video processor 43, and a monitor 44 that can be commonly connected to 1C are provided.
- Each of the endoscopes 1A, 1B, and 1C includes a connector section 5 provided at the tip of a dual-spar code 4 extending from the operation section, and a light source device 42 and a video processor 43. Used by selectively connecting to.
- three types of endoscopes 1A, IB, and 1C are shown in the figure, four or more types of endoscopes may be provided.
- the first endoscope 1A has the same function as the endoscope 1 described in the previous embodiment, and the flexible portion 10 has a small-diameter portion 10a, a large-diameter portion 10b, and A tapered portion 10c connecting the small diameter portion 10a and the large diameter portion 10b is formed.
- the flexible portions 45, 46 of the second and third endoscopes IB, 1C have substantially the same outer diameter over the entire length.
- the flexible portion 45 of the second endoscope 1B has a relatively large outer diameter, while the flexible portion 46 of the third endoscope 1C has a relatively small outer diameter. I have.
- the outer diameter of at least the large diameter portion 10b provided in the flexible portion 10 of the first endoscope 1A is outside the flexible portion 45 of the second endoscope 1B.
- the outer diameter of the large-diameter portion 10b is substantially the same (within ⁇ 5%) or more than the outer diameter of the flexible portion 46, that is, the softness of the second endoscope 1B.
- the outer diameter of the part 45 is set within the range of the outer diameter of the flexible part 46 of the third endoscope 1C.
- the outer diameter of the small diameter portion 10a provided in the flexible portion 10 of the first endoscope 1A is changed to the outer diameter of the flexible portion 46 of the third endoscope 1C.
- the outer diameter of the large diameter portion 10b may be set to be substantially the same as the outer diameter of the flexible portion 45 of the second endoscope 1B.
- the insertion section 2 of the first endoscope 1A In order to smoothly introduce the insertion section 2 of the first endoscope 1A into the large intestine, it is not only dependent on the structure of the insertion section 2 itself, but also that the operator who operates it has less fatigue. It is also important.
- the insertion, observation, and treatment are performed in a coordinated manner while holding the insertion section 2 with the right hand and the operation section 3 with the left hand. Will be implemented.
- the right hand pushes / pulls and twists the insertion section 2, but generally, the outer diameter of the flexible section 10 is large, so that the twisting operation can be performed with a small force, especially in the twisting operation, so that the fatigue is small.
- each operator has an outer diameter of the flexible portion 10 that he or she is accustomed to on a daily basis. Just because the larger the outer diameter of the flexible part 10 is, the less fatigue is felt, but when the extremely large flexible part 10 has not been handled before, the feeling of discomfort increases, and Leads to.
- the outer diameter of the large diameter portion 10b of the first endoscope 1A is changed to the flexible portions 45, 46 of the other second and third endoscopes 1B, 1C.
- the operator is less likely to feel uncomfortable when operating the first endoscope 1A because the outer diameter is set within the range between the thickest outer diameter and the thinnest outer diameter.
- the first endoscope 1 By setting the outer diameter of the large-diameter portion 10b of A to be substantially the same as the outer diameter of the flexible portion 45 of the second endoscope 1B, it is possible to perform a more comfortable operation.
- the tapered portion 10c and the large-diameter portion 10b provided in the flexible portion 10 of the first endoscope 1A have more than half of the entire length (effective length) of the insertion portion, the operation is not performed.
- Most of the part held by the user is a tapered portion 10c or a large-diameter portion 10b, so if the outer diameter of the small-diameter portion 10a is assumed to be the flexible portion of the third endoscope 1C 4 6
- the small-diameter portion 10a may also be gripped at the beginning of insertion or at the end of removal, so that the outer diameter of the small-diameter portion 10a is also the same as the flexible portion 45 of the second endoscope 1B. It is preferable that the outer diameter of the small-diameter portion 10a be set within the range of the ascending colon 35 (see FIG. 7), and the outer diameter of the flexible portion 46 of the third endoscope 1C. If it is set to be almost the same as above, it is possible to perform an operation without a sense of incongruity.
- a sense of discomfort when the operator operates the insertion section 2 of the first endoscope 1A is significantly reduced. can do.
- FIG. 9 shows a third embodiment of the present invention. Note that the shape of the insertion portion is the same as that of the insertion portion 2 described in the first embodiment, and a description thereof will be omitted.
- each of at least one of the portion between the distal end portion 8 and the bending portion 9 of the insertion portion 2 and the portion between the narrow portion 10a provided at the distal end side of the bending portion 9 and the flexible portion 10 is provided.
- the outer skins 48 and 49 for connecting the parts are provided.
- the figure shows a state in which the outer skins 48, 49 of both connecting portions are provided.
- various kinds of materials such as a hard tubular portion, an adhesive, and a soft heat-shrinkable tube can be applied to the connection portion outer skins 48 and 49.
- the outer diameter of the large diameter portion 10b provided on the proximal side of the flexible portion 10 is substantially the same as the outer diameter of the connection portion outer skins 48, 49 (5% of soil).
- the force is set to a slightly smaller dimension. For example, if the outer diameters of the connection parts 48 and 49 are 12.8 mm, the outer diameter of the large diameter part 10 b is set to 12.8 mm, and the outer diameter of the small diameter part 10 a is 11 . Set to 5 mm.
- the outer diameter of the connection portion outer skins 48 and 49 is often set to be larger than the outer diameter of the flexible portion 10. Therefore, in the process of introducing the endoscope into the large intestine, the large intestine part where the distal end part 8 and the curved part 9 can pass through the lumen observed at the distal end part 8 first has a flexible part 10 following it. There is nothing difficult to pass.
- the portion having the large intestine is moved to the distal end portion 8 and the curved portion 9 If the gap between the inner wall of the large intestine and the distal end portion 8 or the curved portion 9 is extremely narrow, the subsequent large diameter portion 10b may not be able to pass or may be difficult to pass .
- the outer diameter of the large diameter portion 10b is substantially the same as or smaller than the outer diameter of the connection portion 48 or 49, the portion through which the outer diameter 48 or 49 of the connection portion can pass is provided. Can also pass through the large diameter portion 10b, so that the insertion portion 2 If it is difficult to advance smoothly, it is known in advance that the cause is not due to the thickness of the large-diameter portion 10b. It will be good if you deal with it.
- the distance between the distal end portion 8 of the insertion portion 2 and the bending portion 9 and the distance between the bending portion 9 and the small-diameter portion 10a provided on the distal end side of the flexible portion 10 are reduced.
- connecting part outer skins 48, 49 for connecting each part are arranged, and furthermore, at the hand side of the flexible part 10 with respect to the outer diameter of the connecting part outer skins 48, 49.
- the outer diameter of the large-diameter portion 10b is set to be approximately the same or slightly smaller, so that when the insertion portion 2 is inserted, the insertion is not hindered by the thickness of the large-diameter portion 10b. Insertion characteristics can be obtained.
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Abstract
Description
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Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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EP03758757.3A EP1554972B1 (en) | 2002-10-25 | 2003-10-22 | Endoscope device |
CA002501662A CA2501662C (en) | 2002-10-25 | 2003-10-22 | Endoscope system |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2002-311598 | 2002-10-25 | ||
JP2002311598A JP4009519B2 (ja) | 2002-10-25 | 2002-10-25 | 内視鏡 |
Publications (1)
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WO2004037075A1 true WO2004037075A1 (ja) | 2004-05-06 |
Family
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PCT/JP2003/013463 WO2004037075A1 (ja) | 2002-10-25 | 2003-10-22 | 内視鏡装置 |
PCT/JP2003/013465 WO2004037076A1 (ja) | 2002-10-25 | 2003-10-22 | 内視鏡 |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2003/013465 WO2004037076A1 (ja) | 2002-10-25 | 2003-10-22 | 内視鏡 |
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US (2) | US20040080613A1 (ja) |
EP (2) | EP1554972B1 (ja) |
JP (1) | JP4009519B2 (ja) |
KR (2) | KR100690467B1 (ja) |
CN (2) | CN100502759C (ja) |
CA (2) | CA2501662C (ja) |
WO (2) | WO2004037075A1 (ja) |
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- 2003-10-22 KR KR1020057005424A patent/KR100690467B1/ko not_active IP Right Cessation
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Also Published As
Publication number | Publication date |
---|---|
WO2004037076A1 (ja) | 2004-05-06 |
EP1554972B1 (en) | 2018-04-11 |
KR20050063772A (ko) | 2005-06-28 |
JP2004141492A (ja) | 2004-05-20 |
US20040080613A1 (en) | 2004-04-29 |
CN1708252A (zh) | 2005-12-14 |
KR100685340B1 (ko) | 2007-02-26 |
US20040106853A1 (en) | 2004-06-03 |
CA2501662C (en) | 2008-04-29 |
JP4009519B2 (ja) | 2007-11-14 |
EP1554972A4 (en) | 2008-03-12 |
CA2501788A1 (en) | 2004-05-06 |
CA2501662A1 (en) | 2004-05-06 |
CN100502759C (zh) | 2009-06-24 |
EP1554973A4 (en) | 2008-03-12 |
CN1708253A (zh) | 2005-12-14 |
KR100690467B1 (ko) | 2007-03-12 |
KR20050063773A (ko) | 2005-06-28 |
CA2501788C (en) | 2011-12-13 |
EP1554972A1 (en) | 2005-07-20 |
EP1554973A1 (en) | 2005-07-20 |
CN100376199C (zh) | 2008-03-26 |
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