WO2013172089A1 - 内視鏡システム - Google Patents
内視鏡システム Download PDFInfo
- Publication number
- WO2013172089A1 WO2013172089A1 PCT/JP2013/057864 JP2013057864W WO2013172089A1 WO 2013172089 A1 WO2013172089 A1 WO 2013172089A1 JP 2013057864 W JP2013057864 W JP 2013057864W WO 2013172089 A1 WO2013172089 A1 WO 2013172089A1
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- WIPO (PCT)
- Prior art keywords
- bending
- diameter
- bending portion
- endoscope
- insertion portion
- Prior art date
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- 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
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/005—Flexible endoscopes
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- 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
Definitions
- the present invention has a plurality of endoscopes each including a first bending portion that can be bent actively and a second bending portion that bends passively by an external force, and can improve operability when inserted into the large intestine or the like.
- the present invention relates to an endoscope system.
- endoscopes are widely used for observation and treatment of living bodies (inside body cavities), inspections and repairs in industrial plant facilities, and the like.
- medical endoscopes can observe a region to be examined in a body cavity by inserting an elongated insertion portion into the body cavity without requiring an incision. Since it can be treated, it has become widely used.
- an endoscope in this medical field is disclosed in JP-A-2007-54400, for example, an active bending portion and a passive bending portion that easily bends when subjected to an external force.
- An endoscope including the above is disclosed.
- medical endoscopes are provided with insertion portions having different outer diameters (thicknesses) in the insertion process of the insertion portion into the large intestine, which is a body cavity, according to the sex of the patient, various body shapes, and the presence or absence of adhesion.
- An endoscope has a different insertion operation method depending on the outer diameter of the insertion portion.For example, in the case of a large-diameter endoscope having a thick outer diameter, the insertion portion is twisted or pulled. The mainstream is an operation of inserting the large intestine while straightening it. In contrast, in the case of a small-diameter endoscope having a thin outer diameter of the insertion portion, an operation of simply pushing the insertion portion into the large intestine is the mainstream.
- the conventional large-diameter endoscope having a passive bending portion has a problem that it is difficult to straighten the large intestine because the distal end of the insertion portion is not easily caught by the bending portion of the large intestine due to the bending of the passive bending portion. is there.
- endoscopes whether they are large-diameter endoscopes or small-diameter endoscopes, it is better to provide a passive bending part in the insertion part in order to improve the insertability and operability when simply pushing into the large intestine. Sometimes it is desirable.
- the present invention has been made in view of the above circumstances, and provided with an insertion portion suitable for an insertion operation into the large intestine by each model between endoscope models having insertion portions having different outer diameters. It is an object of the present invention to provide an endoscope system that can obtain an optimum insertion property.
- An endoscope system includes an insertion portion including a bending portion and a flexible tube portion, and includes an endoscope including a plurality of endoscopes having at least different outer diameters of the flexible tube.
- each of the bending portions in the plurality of endoscopes is connected to the first bending portion that is actively bent by a bending operation, and is passively provided by an external force.
- a second bending portion that bends, and the flexible tube is connected to the second bending portion and has a rigidity higher than that of the second bending portion.
- the length relationship of the second bending portion is set to be opposite to the size relationship of the outer diameter of the flexible tube portion in the insertion portion.
- an optimal insertion property can be obtained by providing an insertion portion suitable for insertion into the large intestine by each model among endoscope models having insertion portions with different outer diameters. It becomes an endoscope system.
- FIG. 14A is a diagram showing the configuration of an insertion portion having a different diameter
- FIG. 14A is a diagram showing the configuration of the insertion portion of the thinnest endoscope
- FIG. 14B is a diagram of FIG. The figure which shows the structure of the insertion part of an endoscope with a larger diameter, and the figure which shows the structure of the insertion part of the endoscope with the largest diameter in FIG.14 (c)
- FIG. 15A is a diagram illustrating the configuration of an insertion portion having a different diameter according to the second embodiment
- FIG. 15A is a diagram illustrating the configuration of the insertion portion of the thinnest endoscope
- FIG. FIG. 15A is a diagram showing the configuration of the insertion portion of the endoscope having a larger diameter than FIG. 15A
- FIG. 15C is a diagram showing the configuration of the insertion portion of the endoscope having the largest diameter.
- FIG. 16A is a diagram illustrating the configuration of an insertion portion having a different diameter according to the third embodiment
- FIG. 16A is a diagram illustrating the configuration of the insertion portion of the endoscope having the smallest diameter
- FIG. 16 is a diagram showing the configuration of the insertion portion of the endoscope having a larger diameter than FIG. 16A
- FIG. 16C is a diagram showing the configuration of the insertion portion of the endoscope having the largest diameter.
- the endoscope in the following description of the configuration will be described by taking a so-called flexible endoscope having an insertion portion flexible for insertion into the digestive organs of the upper or lower part of the living body, but is not limited thereto.
- the technique can be applied to a so-called rigid endoscope having a hard insertion portion used for surgery.
- FIG. 1 is an overall configuration diagram of an endoscope according to the first embodiment
- FIG. 2 is a diagram illustrating a configuration of an insertion portion
- FIG. 4 is a sectional view showing the configuration of the insertion portion of the modification
- FIG. 5 is a diagram showing a state where the small-diameter insertion portion is inserted into the large intestine
- FIG. FIG. 7 is a diagram showing a state in which a large-diameter insertion portion is inserted to the spleen curved portion
- FIG. 1 is an overall configuration diagram of an endoscope according to the first embodiment
- FIG. 2 is a diagram illustrating a configuration of an insertion portion
- FIG. Is a sectional view showing the configuration of the insertion portion
- FIG. 4 is a sectional view showing the configuration of the insertion portion of the modification
- FIG. 5 is a diagram showing a state where the small-diameter insertion portion
- FIG. 8 is a diagram showing a state in which the large-diameter insertion portion is twisted and pulled.
- FIG. 9 is a diagram showing a state in which the intestine is shortened and linearized
- FIG. 9 is a diagram showing a state in which the large-diameter insertion portion is inserted to the vicinity of the liver curved portion
- FIG. 11 is a diagram illustrating a state in which the distal end of the insertion portion has reached the spleen curved portion
- FIG. 12 is a diagram illustrating a state in which the small-diameter insertion portion passes through the splenic curved portion
- FIG. 14 is a diagram showing a state in which a large-diameter insertion portion is difficult to be hooked on the spleen curved portion by the second curved portion
- FIG. 14 is a diagram showing a configuration of the insertion portion having a different diameter
- FIG. The figure which shows the structure of the insertion part of this endoscope FIG.14 (b) is a figure which shows the structure of the insertion part of an endoscope of a diameter larger than FIG.14 (a), and FIG.14 (c) is the thickest diameter. It is a figure which shows the structure of the insertion part of this endoscope.
- an endoscope apparatus 1 mainly includes an endoscope 2, a light source device 3, a video processor 4, and a monitor 5.
- the endoscope 2 has a long and narrow insertion portion 10, an operation portion 11, and a universal cable 19.
- the insertion portion 10 of the endoscope 2 includes a distal end portion 6, a bending portion 30, and a flexible tube portion 9 in order from the distal end side.
- the bending portion 30 is composed of a first bending portion 7 and a second bending portion 8 in order from the distal end side. The detailed configuration of the insertion unit 10 will be described in detail later.
- the operation section 11 includes a treatment instrument channel 39 (see FIG. 3), which will be described later, in which the flexible tube section 9 of the insertion section 10 extends from the bend preventing section and various treatment instruments disposed in the insertion section 10 are inserted. It has a treatment instrument channel insertion portion 18 which is an opening portion.
- the operation section 11 is provided with a bending operation knob 14 for bending the first bending section 7 of the insertion section 10, and is provided with switches 17 for various endoscope functions. Yes.
- the bending operation knob 14 is overlapped by a UD bending operation knob 12 for bending the first bending portion 7 in the vertical direction and an RL bending operation knob 13 for bending the first bending portion 7 in the left-right direction. It is arranged like this.
- the operation portion 11 is provided with a hardness variable dial 22 that can change the hardness of the flexible tube portion 9 of the insertion portion 10.
- the universal cable 19 extended from the operation unit 11 has an endoscope connector 20 that is detachable from the light source device 3 at the extended end.
- the endoscope 2 according to the present embodiment has a distal end from the light source device 3 by a light guide bundle 32 (see FIG. 3) of an illuminating unit (described later) disposed in the universal cable 19, the operation unit 11, and the insertion unit 10.
- the illumination light is transmitted to the unit 6.
- the endoscope connector 20 is provided with a detachable cable 21, and the extended end of the cable 21 is detachable from the video processor 4 by an electric connector.
- the video processor 4 is electrically connected to a monitor 5 that displays an endoscopic image, and performs signal processing on an imaging signal photoelectrically converted by an endoscope imaging unit that is an imaging unit to be described later of the endoscope 2. , And output to the monitor 5 as an image signal.
- the endoscope device 1 is provided with an air / water supply function for ejecting air and water from the distal end portion 6 of the insertion portion 10 of the endoscope 2 in the light source device 3.
- the insertion portion 10 includes a rigid tip portion 6, a first bending portion 7 that is actively bent, and a very flexible first portion that is passively bent. It has a bending portion 30 composed of two bending portions 8 and a flexible tube portion 9 having a hardness set higher than that of the second bending portion 8.
- the second bending portion 8 functions as a passive bending portion that cannot be bent by the operation portion 14 but is bent by receiving an external force.
- the tip portion 6 is provided with a resinous tip cover 24 on a tip hard portion 23 that is a metallic block.
- the distal end portion 6 is provided with an illumination optical system 31 as an illumination window on the distal end surface on which the distal end cover 24 is provided, and a light guide bundle that transmits illumination light from the light source device 3 behind the illumination optical system 31. 32 ends are arranged. That is, the illumination light transmitted by the light guide bundle 32 is emitted forward from the illumination optical system 31 disposed on the distal end surface of the distal end portion 6 to illuminate a subject such as an affected area.
- the distal end portion 6 is provided with an objective lens 33 that is an observation optical system as an observation window, and a solid-state imaging as a charge coupled device that is provided at an imaging position of the objective lens 33 and has a function of photoelectrically converting an optical image.
- An imaging unit 35 including an element (CCD, CMOS, etc.) 34 is provided. Note that a communication cable 36 is extended from the imaging unit 35.
- an air / water supply nozzle 37 for supplying air / water toward the surface of the objective lens 33 is provided on the front end surface of the front end portion 6.
- One end of an air / water supply conduit 38 is connected to the air / water supply nozzle 37.
- an opening of the treatment instrument channel 39 is provided at the distal end surface of the distal end portion 6.
- the first bending portion 7, which is one of the bending portions 30 provided adjacent to the tip portion 6, has a large number of ring-shaped bending pieces 41 rivets at positions corresponding to the adjacent bending pieces 41 in the vertical and horizontal directions. For example, they are connected to each other so as to be rotatable. Note that the end of the bending wire 42 is fixed to the most advanced bending piece 41.
- the bending wire 42 is inserted into a coil sheath 43 disposed up to the distal end of the second bending portion 8 in the insertion portion 10, and the rear end is connected to a sprocket (not shown) in the operation portion 11.
- This sprocket is connected to the bending operation knob 14. Then, by rotating the UD bending operation knob 12 or the RL bending operation knob 13, one of the pair of bending wires 42 arranged along the vertical direction or the horizontal direction is pulled, and the other is relaxed and pulled.
- the first bending portion 7 can be bent toward the bending wire 42 side. That is, the first bending portion 7 constitutes an active flexible portion that is actively bent by the operation of the bending operation knob 14.
- the second bending portion 8 which is one of the bending portions 30, is provided with a spiral tube (also referred to as a flex tube) 44 and a mesh tube (also referred to as a blade) 45 that covers the spiral tube 44. Yes.
- the outer periphery of the mesh tube 45 is covered with a soft bending rubber 47 as an outer skin.
- the curved rubber 47 is connected to the distal end cover 24 of the distal end portion 6 and integrally covers the curved portion 30 from the rear of the distal end portion 6. Further, the curved rubber 47 has a tip portion fixed by a pincushion bonding portion 48.
- the second bending portion 8 has a predetermined hardness (rigidity) set by the rigidity of the mesh tube 45 and the bending rubber 47 covering the spiral tube 44.
- the second bending portion 8 is set to have a predetermined hardness lower than that of the flexible tube portion 9 described later, and has a very flexible configuration. Further, the second bending portion 8 constitutes a passive flexible portion that is passively bent by an external force.
- the flexible tube portion 9 is provided with a spiral tube 51 and a mesh tube 52 covering the spiral tube 51.
- the outer periphery of the mesh tube 45 is covered with a resin tube 53 as an outer skin. Note that the proximal end portion of the curved rubber 47 and the distal end portion of the resin tube 53 are fixed by a bobbin adhering portion 49.
- the resin tube 53 is coated with a chemical resistant coating on the outer peripheral surface, and its own hardness is set so that the flexible tube portion 9 has a predetermined hardness (rigidity). That is, the flexible tube portion 9 is set to have a predetermined hardness higher than that of the second bending portion 8 as described above due to the rigidity of the resin tube 53, and is necessary for the pushing operation into the body cavity (here, the large intestine). It has a configuration with a certain predetermined flexibility (so-called stiffness).
- the spiral tube 51 and the mesh tube 52 of the flexible tube portion 9 have an integrated configuration that is continuous with the spiral tube 44 and the mesh tube 45 of the second bending portion 8.
- the spiral tubes 44 and 51 and the mesh tubes 45 and 52 may be provided separately in the second bending portion 8 and the flexible tube portion 9.
- the difference in hardness (rigidity) between the second bending portion 8 and the flexible tube portion 9 is set by the difference in hardness (rigidity) between the bending rubber 47 and the resin tube 53.
- the second bending portion 8 is set to be very soft and is harder than the second bending portion 8 so that it has a predetermined flexibility necessary for insertion into a body cavity, particularly the large intestine.
- the hardness of the flexible tube portion 9 is set.
- the hardness of the second bending portion 8 and the flexible tube portion 9 is set by changing the helical pitch and plate thickness of the helical tubes 44 and 51 in addition to the difference in hardness between the bending rubber 47 and the resin tube 53. You may do it.
- the second bending portion 8 is configured to be passively bent by providing a plurality of bending pieces 41 in the same manner as the first bending portion 7 in place of the spiral tube 44 and the mesh tube 45. Also good.
- the insertion part 10 comprised as mentioned above becomes a structure where the diameter (outer diameter) of the 1st bending part 7, the 2nd bending part 8, and the flexible tube part 9 is substantially equal.
- the insertion portion 10 is inserted from the anus 101 and pushed together with the bending operation of the first bending portion 7.
- the tip of 10 easily reaches tortuous sigmoid colon 102, descending colon 103 and splenic curve 104.
- the first bending portion 7 is bent in accordance with the bent shape of the splenic bending portion 104, and the distal end of the insertion portion 10 is directed to the transverse colon 105 side.
- the distal end of the insertion portion 10 can pass through the spleen bending portion 104 as shown in FIG.
- the endoscope 2 including the insertion portion 10 having a small diameter when the insertion portion 10 passes through the liver bending portion 106, the first bending portion is similarly matched to the bent shape of the liver bending portion 106. 7 is bent, the distal end of the insertion portion 10 is directed to the ascending colon 107 side, and the liver bending portion 106 can be easily passed only by pushing.
- the entire insertion portion 10 is relatively flexible compared to the large-diameter insertion portion because the outer diameter of the insertion portion 10 is small. Therefore, in the insertion operation up to the deep part of the large intestine as shown in FIG. 6, an operation of simply pushing in is often performed.
- the insertion portion 10 is inserted from the anus 101 and pushed together with the bending operation of the first bending portion 7.
- the distal end of the insertion portion 10 reaches the tortuous sigmoid colon 102, descending colon 103, and splenic curved portion 104.
- the first bending portion 7 is bent and the distal end of the insertion portion 10 is hooked on the bent portion of the spleen bending portion 104 to perform twisting operation and traction. Operated. As shown in FIG.
- the large-diameter insertion portion 10 is pushed and operated in a straightened state by shortening the sigmoid colon 102 and descending colon 103 from the anus 101, as shown in FIG. As shown in FIG. 4, the distal end of the insertion portion 10 can pass through the spleen curved portion 104.
- the large-diameter insertion portion 10 is pulled by pulling the distal end of the insertion portion 10 and pulling the distal end of the insertion portion 10 to the bent portion of the hepatic bending portion 106, thereby performing a twisting operation and a pulling operation.
- the transverse colon 105 is lifted and passed through the hepatic curved portion 106 and inserted to the deep part of the large intestine.
- the entire insertion portion 10 has a predetermined rigidity as compared with the small-diameter insertion portion. Therefore, when inserting into the deep part of the large intestine as shown in FIG. 10, it is necessary to perform an operation of pushing in after shortening and straightening the intestine by a twisting operation and a pulling operation.
- the distal end of the insertion portion 10 is allowed to pass through, for example, the bent portion of the spleen bending portion 104 only by pushing operation. Then, the flexible second bending portion 8 is passively bent along the bent shape, prevents the progression of the intestinal wall of the bent portion and obstructs the progression, and smoothly passes through the spleen bent portion 104. Can do.
- the twisting and pulling operation is performed in a state where the distal end of the insertion portion 10 is hooked on the bending portion of the spleen bending portion 104 to straighten the intestine.
- the 2nd bending part 8 since the 2nd bending part 8 is flexible, a firmness will be crushed and the front-end
- the length of the second bending portion 8 in the longitudinal direction (insertion portion axis) is set longer as the diameter becomes thinner, and the length of the second bending portion 8 becomes larger as the diameter becomes larger.
- the length in the longitudinal (insertion portion axis) direction is set short.
- three insertion portions 10 of the endoscope 2 having different diameters d1, d2, and d3 will be exemplified and described in detail here.
- 14A shows the configuration of the insertion portion of the endoscope with the smallest diameter
- FIG. 14B shows the configuration of the insertion portion of the endoscope with a diameter larger than that of FIG. 14A.
- FIG. 14C is a diagram showing the configuration of the insertion portion of the thickest endoscope.
- the 14 include the insertion portions 10a, 10b, and 10c (flexible tube portions 9) having different diameters d1, d2, and d3, respectively.
- the relationship between the thicknesses (thinness) of 10b and 10c (flexible tube portion 9) is such that diameter d1 ⁇ diameter d2 ⁇ diameter d3.
- the insertion portions 10a, 10b, and 10c of these three endoscopes 2 are each provided with a first bending portion 7 having substantially the same length L in the longitudinal direction.
- the length L1 of the second bending portion 8 in the longitudinal direction is set in the insertion portion 10a in which at least the flexible tube portion 9 is set to the thinnest (short) diameter d1.
- the length L2 in the longitudinal direction of the second bending portion 8 is set in the insertion portion 10b in which at least the flexible tube portion 9 is set to the intermediate diameter d2 in which at least the flexible tube portion 9 is set in the insertion portion 10b in which at least the flexible tube portion 9 is set to the intermediate diameter d2
- the insertion portion 10a in which at least the flexible tube portion 9 is set to the thickest (longest) diameter d3 has a length L3 in the longitudinal direction of the second bending portion 8.
- the three insertion portions 10a, 10b, and 10 here have the longest length L1 of the second bending portion 8 of the insertion portion 10a, and then the insertion portion 10a.
- the length L2 of the second bending portion 8 of 10b is long, and the length L3 of the second bending portion 8 of the insertion portion 10c is set to be the shortest (L1> L2> L3). That is, in the insertion portion 10, the length of the second bending portion 8 is set to be longer as at least the flexible tube portion 9 has a smaller diameter, and the length of the second bending portion 8 is shorter at least as the flexible tube portion 9 has a larger diameter. Is set.
- the length relationship (L1> L2> L3) of the lengths L1, L2, and L3 of the respective second bending portions 8 has been described using the three insertion portions 10a, 10b, and 10c as an example.
- the length of the second bending portion 8 is set longer from the thinnest diameter of the insertion portion 10 so as to become shorter in order of increasing thickness. Is set to That is, in the plurality of insertion portions 10, the length relationship of the second bending portion 8 is set opposite to the size relationship of the diameters.
- an endoscope system including a plurality of endoscopes 2, depending on the diameter of the insertion portion 10 between each model, when inserted into the large intestine, which is a body cavity, as described above, Since the intestinal shortening and straightening ratios by the twisting operation and the traction operation are changed, the length of the second bending portion 8 that is passively bent by an external force is changed in accordance with the insertion operation.
- the insertion portion 10 with a small diameter has a high ratio of being inserted into the deep part of the large intestine by a pushing operation, when passing through each bent part of the large intestine, it can smoothly pass through each bent part without pushing up the intestinal wall
- the length of the flexible second bending portion 8 is set longer than that of the large-diameter insertion portion 10.
- the large-diameter insertion portion 10 has a high ratio of shortening and straightening the intestine by twisting and pulling operations while the distal end of the insertion portion 10 is hooked on each bent portion of the large intestine. Therefore, the length of the flexible second bending portion 8 is set shorter than that of the thin insertion portion 10 so that the intestine can be easily shortened and straightened without the tip of the insertion portion 10 being removed.
- an endoscope system including a plurality of endoscopes 2, at least between models of a plurality of endoscopes 2 including insertion portions 10 having different outer diameters of flexible tube portions 9.
- Optimum insertion as a configuration in which the lengths of the second bending portions 8 in the longitudinal direction are opposite to the diameters of the different insertion portions 10 so as to be adapted to the insertion operation into the large intestine according to the diameter of each insertion portion 10 Sex can be obtained.
- FIG. 15 is a diagram illustrating the configuration of the insertion portion having a different diameter according to the second embodiment of the present invention
- FIG. 15A is a diagram illustrating the configuration of the insertion portion of the endoscope having the smallest diameter
- FIG. 15B is a diagram showing the configuration of the insertion portion of the endoscope having a diameter larger than that of FIG. 15A
- FIG. 15C is a diagram showing the configuration of the insertion portion of the endoscope having the largest diameter. It is.
- the length of the second bending portion 8 is set longer as the diameter is thinner, and the length of the second bending portion 8 is set shorter as the diameter is larger.
- three insertion portions 10 of the endoscope 2 having different diameters d1, d2, and d3 are illustrated and described here in detail.
- the relationship between the thicknesses (thinness) of the insertion portions 10a, 10b, and 10c is such that the diameter d1 ⁇ the diameter d2 ⁇ the diameter d3.
- the three insertion portions 10a, 10b, and 10 have the longest length L1 of the second bending portion 8 of the insertion portion 10a, and then the insertion portion 10a.
- the length L2 of the second bending portion 8 of 10b is long, and the length L3 of the second bending portion 8 of the insertion portion 10c is set to be the shortest (L1> L2> L3).
- the insertion portions 10a, 10b, and 10c of the three endoscopes 2 have the same length LA of the bending portion 30, the relationship between the lengths of the first bending portions 7 is the first of the insertion portions 10a.
- the length La of the bending portion 7 is the shortest, the length Lb of the first bending portion 7 of the insertion portion 10b is then short, and the length Lc of the first bending portion 7 of the insertion portion 10c is the longest. (La ⁇ Lb ⁇ Lc). That is, in the insertion portion 10, the length of the first bending portion 7 is set shorter as the diameter of the flexible tube portion 9 is thinner, and the length of the first bending portion 7 is set longer as the diameter is larger.
- These three endoscopes 2 include a bending portion 30 having substantially the same length, and the length of the first bending portion 7 is at least with respect to the diameters d1, d2, d3 of the flexible tube portion 9 of the insertion portion 10.
- the ratios of the lengths La, Lb, Lc and the lengths L1, L2, L3 of the second bending portion 8 are different.
- the three insertion portions 10a, 10b, and 10c have been described as an example.
- the present invention is not limited to these three, and the diameter of the insertion portion 10 is the narrowest in the order of the plurality of endoscope 2 models.
- the length of the second bending portion 8 is set to be longer and is set to be shorter in the order of increasing thickness.
- the length LA of the bending portion 30 constituted by the first bending portion 7 and the second bending portion 8 is the same between the models, so that the distal end portion 6 and the proximal end of the bending portion 30 are the same. Since the area up to the second bending portion 8 is unified, the sense of distance of insertion into the large intestine is common, and the structure can be used without a sense of incongruity.
- FIG. 16 is a diagram illustrating a configuration of an insertion portion having a different diameter according to the third embodiment of the present invention
- FIG. 16 (a) is a diagram illustrating a configuration of the insertion portion of the thinnest endoscope.
- FIG. 16B is a diagram showing the configuration of the insertion portion of the endoscope having a larger diameter than that of FIG. 16A
- FIG. 16C is a diagram showing the configuration of the insertion portion of the endoscope having the largest diameter. It is.
- the relationship between the thicknesses (thinness) of the insertion portions 10a, 10b, and 10c is such that the diameter d1 ⁇ the diameter d2 ⁇ the diameter d3.
- each second bending portion 8 is provided with a plurality of bending pieces 41 as shown in FIG. 4 and is outside the state in which each second bending portion 8 is bent to the maximum by setting each piece size.
- the maximum bending angle ⁇ 1 of the second bending portion 8 of the insertion portion 10a is the largest when the respective second bending portions 8 are bent to the maximum.
- the maximum bending angle ⁇ 2 of the second bending portion 8 of the insertion portion 10b is large, and the maximum bending angle ⁇ 3 of the second bending portion 8 of the insertion portion 10c is set to be the smallest ( ⁇ 1> ⁇ 2> ⁇ 3).
- the three insertion portions 10a, 10b, and 10c have been described as examples. However, the present invention is not limited to these three, and at least the flexible tube portion of the insertion portion 10 is not limited to the three types of endoscopes 2.
- the maximum bending angle of the second bending portion 8 is set to be large from the order of the diameter of 9 being the thinnest, and the maximum bending angle is set to be small in the order of increasing thickness. That is, in the plurality of insertion portions 10, the relationship of the maximum bending angle of the second bending portion 8 is set against the magnitude relationship of the diameters.
- the flexible tube portion 9 of the insertion portion 10 is set so that the length of the second bending portion 8 increases from the thinnest to the shortest toward the thickest.
- the insertion portion 10 having a small diameter has a longer maximum length than the insertion portion 10 having a large diameter by setting the maximum bending angle of the second bending portion 8 to be large.
- 10 is set so that the length of the second bending portion 8 is shorter than that of the thin insertion portion 10 by setting the maximum bending angle of the second bending portion 8 to be small.
- the length relationship of the second bending portion 8 is also in conflict with the size relationship of the diameter of the insertion portion 10 in accordance with this, so the above-mentioned first
- the radius of curvature of the arc drawn by each outer peripheral portion in the state where each second bending portion 8 is bent to the maximum is set to be the same.
- each second bending portion 8 comes into contact with the intestine wall to the large intestine and curves by the external force is unified, the insertion feeling of insertion into the large intestine of the insertion portion 10 becomes common and can be used without a sense of incongruity. It becomes composition.
- the described requirements can be deleted if the stated problem can be solved and the stated effect can be obtained.
- Such a configuration can be extracted as an invention.
Abstract
Description
先ず、図面に基づいて本発明の第1の実施の形態を説明する。図1から図14は本発明の第1の実施の形態に係り、図1は第1の実施の形態に係る内視鏡の全体構成図、図2は挿入部の構成を示す図、図3は挿入部の構成を示す断面図、図4は変形例の挿入部の構成を示す断面図、図5は細径の挿入部を大腸に挿入する状態を示す図、図6は細径の挿入部が大腸深部に挿入された状態を示す図、図7は太径の挿入部が脾湾曲部まで挿入された状態を示す図、図8は太径の挿入部が捻り操作および牽引操作されて腸を短縮して直線化した状態を示す図、図9は太径の挿入部が肝湾曲部近傍まで挿入された状態を示す図、図10は太径の挿入部が大腸深部に挿入された状態を示す図、図11は挿入部の先端が脾湾曲部に到達した状態を示す図、図12は細径の挿入部が脾湾曲部を通過する状態を示す図、図13は太径の挿入部が第2湾曲部により脾湾曲部に引掛け難い状態を示す図、図14は径の異なる挿入部の構成を示す図であって、図14(a)が最も細径の内視鏡の挿入部の構成を示す図、図14(b)が図14(a)よりも太い径の内視鏡の挿入部の構成を示す図および図14(c)が最も太径の内視鏡の挿入部の構成を示す図である。
本実施の形態の挿入部10は、図2および図3に示すように、硬性の先端部6と、能動的に湾曲操作される第1湾曲部7および受動的に湾曲する非常に柔軟な第2湾曲部8とからなる湾曲部30と、第2湾曲部8よりも硬度が高く設定された可撓管部9と、を有している。なお、第2湾曲部8は、操作部14によって湾曲操作はできないが、外力をうけることで曲げられる受動型の湾曲部として機能するものである。
また、以上のように構成された挿入部10は、第1湾曲部7、第2湾曲部8および可撓管部9の径(外径)が略等しい構成となっている。
先ず、細径の挿入部10を備えた内視鏡2においては、図5に示すように、挿入部10を肛門101から挿入し、第1湾曲部7の湾曲操作と共に押し込むことで、挿入部10の先端は曲がりくねったS状結腸102、下行結腸103および脾湾曲部104まで容易に到達する。そして、細径の挿入部10を備えた内視鏡2では、脾湾曲部104の屈曲形状に合わせて第1湾曲部7を湾曲操作して、横行結腸105側に挿入部10の先端を方向付けて押し込み操作することで、図5に示すように、挿入部10の先端が脾湾曲部104を通過することができる。
次に、図15に基づいて、第2の実施の形態について説明する。この実施の形態は第1の実施の形態の変形例であって、同一の部材には同一の符号を付し、詳しい説明を省略する。図15は本発明の第2の実施の形態に係り、径の異なる挿入部の構成を示す図であって、図15(a)が最も細径の内視鏡の挿入部の構成を示す図、図15(b)が図15(a)よりも太い径の内視鏡の挿入部の構成を示す図および図15(c)が最も太径の内視鏡の挿入部の構成を示す図である。
次に、図16に基づいて、第3の実施の形態について説明する。この実施の形態も第1の実施の形態の変形例であって、同一の部材には同一の符号を付し、詳しい説明を省略する。なお、本実施の形態の構成は、第2の実施の形態の構成にも適用できるものである。図16は本発明の第3の実施の形態に係り、径の異なる挿入部の構成を示す図であって、図16(a)が最も細径の内視鏡の挿入部の構成を示す図、図16(b)が図16(a)よりも太い径の内視鏡の挿入部の構成を示す図および図16(c)が最も太径の内視鏡の挿入部の構成を示す図である。
Claims (7)
- 湾曲部と可撓管部により構成される挿入部を備えており、少なくとも前記可撓管の外径が互いに異なる複数の内視鏡を具備する内視鏡システムであって、
前記複数の内視鏡における湾曲部のそれぞれが、
湾曲操作されて能動的に湾曲する第1湾曲部と、
前記第1湾曲部に連設され、外力により受動的に湾曲する第2湾曲部と、
を備え、
前記可撓管は、前記第2湾曲部に連設されると共に、該第2湾曲部よりも剛性が高く形成され、
前記複数の内視鏡は、前記挿入部における可撓管部の外径の大小関係に対して前記第2湾曲部の長さの関係が相反するように設定されている、
ことを特徴とする内視鏡システム。 - 前記複数の内視鏡の前記第1湾曲部の長さが略同一であることを特徴とする請求項1に記載の内視鏡システム。
- 前記複数の内視鏡の前記第1湾曲部と前記第2湾曲部を合せた湾曲部全体の長さが略同一であることを特徴とする請求項1に記載の内視鏡システム。
- 前記第2湾曲部は、前記挿入部の径の大小関係に対して最大湾曲角度の大きさの関係が相反するように設定されていることを特徴とする請求項1から請求項3のいずれか1項に記載の内視鏡システム。
- 前記第2湾曲部は、最大湾曲時における外方側の外周部が描く弧が略同一の曲率に設定されていることを特徴とする請求項1から請求項4のいずれか1項に記載の内視鏡システム。
- 前記第2湾曲部の外径は前記可撓管部の外径と略等しいことを特徴とする請求項1に記載の内視鏡システム。
- 前記第1湾曲部の外径は前記可撓管部の外径と略等しいことを特徴とする請求項1に記載の内視鏡システム。
Priority Applications (4)
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EP13791348.9A EP2702925B1 (en) | 2012-05-14 | 2013-03-19 | Endoscope system |
JP2013534099A JP5390048B1 (ja) | 2012-05-14 | 2013-03-19 | 内視鏡システム |
CN201380001531.6A CN103582446B (zh) | 2012-05-14 | 2013-03-19 | 内窥镜系统 |
US13/955,540 US20140039259A1 (en) | 2012-05-14 | 2013-07-31 | Endoscope system |
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US13/955,540 Continuation US20140039259A1 (en) | 2012-05-14 | 2013-07-31 | Endoscope system |
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WO2013172089A1 true WO2013172089A1 (ja) | 2013-11-21 |
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EP (1) | EP2702925B1 (ja) |
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WO2017082365A1 (ja) * | 2015-11-13 | 2017-05-18 | オリンパス株式会社 | 内視鏡及び内視鏡システム |
JP2017111605A (ja) * | 2015-12-16 | 2017-06-22 | オリンパス株式会社 | 内視鏡検査業務支援システム |
US11045073B2 (en) * | 2015-12-25 | 2021-06-29 | Olympus Corporation | Flexible tube insertion apparatus |
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CN107405051B (zh) * | 2015-11-24 | 2019-06-28 | 奥林巴斯株式会社 | 内窥镜系统 |
WO2017216835A1 (ja) * | 2016-06-13 | 2017-12-21 | オリンパス株式会社 | 医療用デバイス |
WO2018109117A1 (en) * | 2016-12-16 | 2018-06-21 | Sony Corporation | Capturing an image of a scene |
US10779715B2 (en) * | 2017-02-23 | 2020-09-22 | Sony Olympus Medical Solutions Inc. | Endoscope apparatus |
WO2018191063A1 (en) * | 2017-04-14 | 2018-10-18 | Inventio, Inc. | Endoscope shaft |
US20220054118A1 (en) * | 2020-08-20 | 2022-02-24 | Satoshi AWADU | Flexible endoscope insertion method for examining the lateral wall of the lumen or the lateral side of the organ |
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Also Published As
Publication number | Publication date |
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EP2702925A4 (en) | 2015-09-23 |
CN103582446A (zh) | 2014-02-12 |
EP2702925B1 (en) | 2016-10-19 |
EP2702925A1 (en) | 2014-03-05 |
CN103582446B (zh) | 2015-12-09 |
JPWO2013172089A1 (ja) | 2016-01-12 |
JP5390048B1 (ja) | 2014-01-15 |
US20140039259A1 (en) | 2014-02-06 |
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