WO2012070570A1 - 挿入部硬度可変バルーン付カテーテル及び第2湾曲部付内視鏡 - Google Patents
挿入部硬度可変バルーン付カテーテル及び第2湾曲部付内視鏡 Download PDFInfo
- Publication number
- WO2012070570A1 WO2012070570A1 PCT/JP2011/076906 JP2011076906W WO2012070570A1 WO 2012070570 A1 WO2012070570 A1 WO 2012070570A1 JP 2011076906 W JP2011076906 W JP 2011076906W WO 2012070570 A1 WO2012070570 A1 WO 2012070570A1
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- WIPO (PCT)
- Prior art keywords
- balloon
- bending
- sheath
- catheter
- insertion portion
- Prior art date
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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
- A61B1/00064—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
- A61B1/00082—Balloons
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/0043—Catheters; Hollow probes characterised by structural features
- A61M25/005—Catheters; Hollow probes characterised by structural features with embedded materials for reinforcement, e.g. wires, coils, braids
- A61M25/0052—Localized reinforcement, e.g. where only a specific part of the catheter is reinforced, for rapid exchange guidewire port
-
- 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
- A61B1/00112—Connection or coupling means
- A61B1/00119—Tubes or pipes in or with an endoscope
-
- 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
- A61B1/0125—Endoscope within endoscope
-
- 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
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/0067—Catheters; Hollow probes characterised by the distal end, e.g. tips
- A61M25/008—Strength or flexibility characteristics of the catheter tip
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/10—Balloon catheters
- A61M25/1002—Balloon catheters characterised by balloon shape
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/0043—Catheters; Hollow probes characterised by structural features
- A61M2025/0063—Catheters; Hollow probes characterised by structural features having means, e.g. stylets, mandrils, rods or wires to reinforce or adjust temporarily the stiffness, column strength or pushability of catheters which are already inserted into the human body
Definitions
- the present invention relates to an insertion portion hardness variable balloon catheter and a second bending portion endoscope for guiding an insertion portion of an endoscope to a target site.
- an endoscope inserted into a lumen such as a stomach or intestine has an elongated insertion portion.
- the lumen has a three-dimensionally complicated bent shape.
- a bending portion is provided that enables the orientation of the distal end portion of the insertion portion to be changed, for example, in the vertical direction or the horizontal direction.
- the bending portion bends in a desired direction by operating, for example, a bending lever provided in an operation portion held by the operator.
- the operator first inserts the distal end portion of the insertion portion of the endoscope to the vicinity of the biliary tract. Thereafter, the operator performs a catheter introduction procedure, a catheter fixation procedure, and an insertion portion introduction procedure.
- the catheter introduction technique is a technique for introducing a balloon catheter into the biliary tract via a treatment instrument channel of an endoscope.
- the catheter fixing procedure is a procedure for fixing the balloon of the balloon catheter to the biliary tract.
- the insertion section introduction technique is a technique for inserting the insertion section into the biliary tract along a balloon catheter fixed in the biliary tract.
- the catheter introduction technique the catheter fixing technique, and the insertion part introduction technique will be described.
- the surgeon introduces the insertion portion 100 into the duodenum 110 and places it near the biliary tract.
- the surgeon performs an operation to bend the bending portion 102 so that the distal end surface of the distal end portion 101 faces a road exit (hereinafter referred to as an outlet) 112 that is a duodenum side opening of the biliary tract 111.
- an outlet 112 a road exit (hereinafter referred to as an outlet) 112 that is a duodenum side opening of the biliary tract 111.
- the operator performs a catheter introduction procedure, a catheter fixation procedure, and an insertion portion introduction procedure.
- the catheter introduction procedure will be described.
- the surgeon allows the balloon catheter 120 to be led out from an opening of a treatment instrument channel (not shown) provided on the distal end surface of the distal end portion 101. Then, the surgeon places the treatment instrument distal end 121 near the outlet 112 of the biliary tract 111.
- the operator inserts the treatment instrument insertion portion 122 of the balloon-equipped catheter 120 into the biliary tract 111 in a predetermined amount from the distal end surface of the insertion portion 100 as shown in FIG.
- the treatment instrument distal end 121 is disposed at a desired position in the biliary tract 111.
- the catheter fixation procedure will be described.
- the surgeon arranges the treatment instrument distal end portion 121 at the position in the biliary tract 111 and then supplies air, for example, to a balloon 123 provided on the treatment instrument distal end portion 121.
- the balloon 123 is inflated as shown by a broken line in FIG. 2, and the inflated balloon 123 is in close contact with the inner wall of the biliary tract 111.
- the treatment instrument distal end 121 of the balloon catheter 120 is fixed at a desired position in the biliary tract 111.
- the insertion part introduction technique will be described.
- the operator guides the insertion portion 100 into the biliary tract 111 after fixing the treatment instrument distal end portion 121 in the biliary tract 111.
- the operator advances the insertion portion 100 so as to be along the treatment instrument insertion portion 122 of the catheter 120 with balloon.
- the insertion portion 100 when the insertion portion 100 is inserted into the biliary tract 111, the following difference is caused in the guidance of the insertion portion 100 depending on whether the hardness of the treatment instrument insertion portion 122 disposed in the biliary tract 111 is soft or hard. Arise.
- the hardness of the treatment instrument insertion portion 122 means that the treatment instrument insertion portion 122 is easily bent (also referred to as first flexibility). Specifically, when the treatment instrument insertion section 122 is first flexible, the insertion section 122 is inserted into the treatment instrument channel passing through the bending section 102, and the operation of the bending lever is performed. The bending portion 102 bends smoothly to a desired bending state.
- the hardness of the treatment instrument insertion portion 122 means that the treatment instrument insertion portion 122 is difficult to bend (also referred to as second flexibility). Specifically, when the treatment instrument insertion section 122 is first flexible, the insertion section 122 is inserted into the treatment instrument channel passing through the bending section 102, and the operation of the bending lever is performed. For example, the bending portion 102 is flexible so that it is difficult to change to the desired bending state shown in FIG.
- the treatment instrument insertion portion 122 inserted into the biliary tract 111 has the first flexibility
- the surgeon operates a bending lever (not shown)
- the treatment instrument insertion portion 122 is disposed in the bending portion 102. Even if it is in a state, the bending portion 102 becomes a desired bending state in accordance with the bending lever operation.
- the surgeon can easily face the distal end portion 101 of the insertion portion 100 against the outlet 112 of the biliary tract 111 in a state where the treatment instrument insertion portion 122 is disposed in the bending portion 102.
- the operator can smoothly perform the catheter introduction procedure and the catheter fixation procedure thereafter.
- the insertion portion 100 is not guided into the biliary tract 111, and the bending shape of the treatment instrument insertion portion 122 is as shown in FIG.
- the large bent shape R shown by the broken line changes to the small bent shape r shown by the two-dot chain line. That is, the insertion unit 100 moves through the duodenum 110 as indicated by the arrow Y3 in the figure without moving forward along the treatment instrument insertion unit 122, and is inserted into the treatment instrument channel. Gradually changes to a tense state.
- the shape of the treatment instrument insertion portion 122 is held in the bent shape R.
- the distal end portion 101 of the insertion portion 100 reaches the desired position in the biliary tract 111 along the treatment instrument insertion portion 122 as shown by a two-dot chain line in FIG. Inserted.
- the bending portion 102 has a desired bending shape. I can't change. As a result, as shown in FIG. 5, the distal end portion 101 of the insertion portion 100 is disposed at a position different from the direction desired by the operator, and it becomes difficult to control the protruding direction of the treatment instrument insertion portion 122.
- the treatment instrument insertion part 122 is 2nd flexibility, it becomes necessary to change a work procedure, for example as shown below.
- the surgeon operates the bending lever in a state where the treatment instrument insertion portion 122 is disposed on the rear side of the bending portion 102.
- the tip 101 faces the outlet 112 of the biliary tract 111 as shown in FIG.
- the surgeon inserts the treatment instrument insertion portion 122 into the biliary tract 111 through the curved bending portion 102.
- the second flexible treatment instrument insertion portion 122 has high straightness. Therefore, when the treatment instrument insertion portion 122 is inserted into the biliary tract 111 according to the procedure described above, the insertion portion 122 cannot smoothly pass through the bending portion 102, or the treatment instrument insertion portion protrudes from the distal end portion 101. There is a possibility that 122 or the like moves straight through the biliary tract 111 as indicated by an arrow Y6 in FIG. When the treatment instrument insertion portion 122 goes straight through the biliary tract 111, the treatment instrument distal end portion 121 may come into contact with the inner wall.
- the disposition flexibility that enables the treatment instrument distal end portion to be easily disposed at a desired position in the biliary tract, and the distal end portion of the insertion portion are disposed on the treatment instrument insertion portion.
- Patent Document 1 Japanese Patent Laid-Open No. 2007-319668 (hereinafter referred to as Patent Document 1) has a distal end that can be inserted into a body cavity of a patient, a first flexible catheter segment, A medical catheter is shown having a second flexible catheter segment disposed distal to one flexible catheter segment. The medical catheter is configured to cure and soften only the first flexible catheter segment and to cure and soften only the second flexible catheter segment. Configured to, However, the medical catheter shown in Patent Document 1 has a complicated configuration. In this medical catheter, it is difficult to switch the entire insertion portion from a cured state to a flexible state by one action, or vice versa.
- the present invention has been made in view of the above circumstances, and the flexibility of the insertion portion of the balloon catheter is changed from the first flexibility to the second flexibility or the second flexibility by one action. It is an object to provide a catheter with a balloon and an endoscope with a second bending portion that can be changed from sex to first flexibility.
- the insertion portion hardness variable balloon catheter has a coil-shaped member that is extendable and has a predetermined elastic force, a compression length is set to a predetermined length, and a fluid conduit.
- a defined flexible tube body, the sheath body surrounding the coiled member, and one end surface of the coiled member which is provided on one end side of the sheath body and has a larger diameter than the sheath body.
- An insertion portion comprising a sheath end portion having a contact surface, the sheath end portion having one opening of the fluid conduit, and the sheath body having a sheath having the other opening of the fluid conduit on the other end side And is provided at the sheath end of the sheath and expands by supplying fluid through one opening of the fluid conduit, and the outer diameter expands to be larger than the outer diameter of the sheath end, Fluid is discharged through the one opening And an inflatable / contractible balloon configured to be contracted to be in close contact with the outer peripheral surface of the sheath end, and fixed to the other end of the sheath, and into the balloon via the fluid conduit
- An operation unit main body including a fluid supply / discharge device connecting portion that is directly or indirectly connected to a fluid supply / discharge device that supplies fluid or discharges fluid in the balloon, and an inner peripheral surface side of the operation portion main body And an operation portion including a slide member disposed on the other end side of the operation portion main body by the elastic force of the coil-shaped member.
- An endoscope with a second bending portion includes a first bending portion located on a distal end side of an insertion portion of the endoscope, and a second bending portion provided continuously with the first bending portion.
- a first operation device including a bending knob for bending the first bending portion in an operation portion of the endoscope; a second operation device including a bending knob for bending the second bending portion;
- the advancement / retraction knob for advancing / retreating the treatment instrument led into the body through the treatment instrument insertion port, the advance / retreat operation of the treatment instrument by operating the advance / retreat knob, or the second bending portion by operating the bending knob It is possible to selectively perform an interlocking operation that makes the treatment tool bend in one direction and retracts the treatment
- the figure explaining the catheter introduction technique in connection with the technique of inserting the insertion part into the biliary tract The figure explaining the catheter fixation technique in connection with the technique of inserting the insertion part into the biliary tract
- the figure explaining the relationship between the insertion part and treatment tool insertion part in the insertion part introduction technique in connection with the procedure which inserts an insertion part in a biliary tract, and a treatment tool insertion part is the 1st flexibility.
- the figure explaining the relationship between the insertion part and treatment tool insertion part in the insertion part introduction technique in connection with the procedure which inserts an insertion part in a biliary tract, and a treatment tool insertion part is 2nd flexibility.
- the figure explaining an endoscope system provided with an endoscope and a catheter with an insertion part hardness variable balloon The figure explaining the catheter with an insertion part hardness variable balloon whose operation state of an operation part is a 1st operation state, and a coil-shaped member is natural length Sectional view taken along line Y9-Y9 in FIG.
- the figure explaining the coil-shaped member which equips the tip side part predetermined part with the large diameter wire winding part formed with the wire In an endoscope system including an endoscope having a first bending portion and a second bending portion in an endoscope insertion portion, and a balloon-attached catheter, insertion of the catheter to insert the endoscope insertion portion into the biliary tract Of the balloon inflated and tightly fixed to the wall of the biliary tract.
- transduced to the balloon vicinity along the catheter insertion part along the 1st bending part and 2nd bending part of a bending free state The figure explaining the endoscope with the 2nd bending part which provided the 1st operating device and the 2nd operating device in the operation part.
- action of a projection part with which a catheter advance / retreat knob is equipped The top view explaining the 2nd operating device provided with a selective power transmission mechanism part
- the side view explaining a 2nd operating device provided with a selective power transmission mechanism part Knob shaft longitudinal sectional view for explaining the structure of the independent / circular rotating mechanism A cross-sectional view taken along line Y22-Y22 in FIG.
- the figure explaining rotation of the 1st rotating body The figure explaining the state which the inner surface of the rotating 2nd rotary body contact
- positioned at the bifurcation part branched to the gallbladder duct and the common hepatic duct The figure which shows an example of the balloon suitable for arrange
- the endoscope system 1 includes an endoscope 2 and a catheter with an insertion portion hardness variable balloon (hereinafter abbreviated as a catheter) 3.
- the endoscope 2 includes an elongated endoscope insertion portion 11 having flexibility, an endoscope operation portion 12 provided on the proximal end side of the endoscope insertion portion 11, and an endoscope operation portion 12. And a flexible universal cord 13 extending from the side.
- An endoscope connector 14 that is detachably connected to an external device such as a light source device (not shown) is provided at the end of the universal cord 13.
- the endoscope insertion portion 11 is configured by connecting a distal end portion 15, a bending portion 16, and a flexible flexible tube portion 17 in order from the distal end side.
- the bending portion 16 is configured to bend in the vertical direction, for example.
- the endoscope operation section 12 is provided with a bending operation device 18 for bending the bending section 16.
- Reference numeral 19 denotes a treatment instrument insertion port.
- the treatment instrument such as the catheter 3 is inserted into the treatment instrument channel (not shown) via the treatment instrument insertion port 19 as indicated by an arrow Y7a, and is led out from the channel tip opening (not shown) into the body.
- the catheter 3 mainly includes a catheter insertion portion 31, a catheter operation portion 32, and a balloon 33.
- the catheter insertion portion 31 is configured to change flexibility.
- the catheter operation unit 32 changes the flexibility of the catheter insertion unit 31.
- the balloon 33 is freely expandable / contractable, and is provided at the distal end portion of the catheter insertion portion 31.
- the catheter insertion portion 31 includes a sheath 34 and a coiled member 35.
- the catheter operation unit 32 includes an operation unit main body 36 and a slide member 37.
- the slide member 37 is movable forward and backward as shown by an arrow Y7b with respect to the operation unit main body 36.
- the state of the catheter operation section 32 shown in the figure is a state in which the flexibility of the catheter insertion section 31 is changed to the second hardest flexibility. At this time, the slide member 37 is advanced with respect to the operation unit main body 36.
- Reference numeral 38 denotes a fluid tube.
- the fluid tube 38 extends from a fluid supply / discharge device (not shown) which is an external device.
- Reference numeral 39 denotes a fluid supply / discharge device connecting portion (hereinafter abbreviated as a fluid cap), to which a fluid tube 38 is connected.
- the fluid supply / discharge device connecting portion is not limited to the fluid base 39, and may be a luer base to which a syringe that is a fluid supply / discharge device is connected.
- the sheath 34 is a tube body having a predetermined flexibility and having a sheath fluid path 41.
- the sheath 34 includes a sheath main body 42 and a sheath end portion 43.
- a coil-shaped member 35 is surrounded by the sheath body 42.
- the sheath end portion 43 is provided on one end side of the sheath body 42.
- a balloon 33 is attached to the sheath end portion 43.
- the sheath end 43 has a larger diameter than the sheath body 42.
- the sheath end portion 43 includes a contact surface 43r with which one end surface of the coiled member 35 contacts.
- a balloon opening 41 f is formed in the balloon attachment range of the sheath end portion 43.
- the balloon opening 41 f is one opening of the sheath fluid path 41.
- the other opening of the sheath fluid passage 41 is formed in the other end surface of the sheath body 42 as a tube base end opening 41r.
- the coiled member 35 is an elongated coil spring.
- the coil-shaped member 35 has a predetermined elastic force at a predetermined line length and pitch, and is configured to be deformed to a predetermined compression length with a predetermined natural length.
- the length of the sheath body 42 is set longer than the natural length of the coiled member 35 by a predetermined length.
- the balloon 33 has a pipe shape, for example.
- the distal end side and the proximal end side of the balloon 33 are fixed to the outer peripheral surface of the sheath end portion 43 of the sheath 34 by bonding or by thread winding bonding.
- the balloon 33 is inflated into a substantially spherical shape when fluid such as air or water is supplied into the balloon 33 through the balloon opening 41f.
- the balloon 33 has a configuration in which the outer diameter dimension is larger than the outer diameter of the sheath end portion 43 (see FIGS. 10 and 11), and is arranged in close contact with the wall of the biliary tract, for example.
- the balloon 33 contracts by discharging the fluid supplied into the balloon 33 from the balloon opening 41f, and is in close contact with the outer peripheral surface of the sheath end portion 43 as shown in the figure.
- the operation portion main body 36 includes an operation portion exterior body 51 that also serves as a gripping portion, and a sheath fixing member 52.
- the operation portion exterior body 51 has a pipe shape having an axial through hole 51h.
- the sheath fixing member 52 is integrally fixed at a predetermined position in the axial through hole 51h.
- a first cylinder portion 61 (described later) constituting the slide member 37 is slidably disposed in the axial through hole 51h.
- the sheath fixing member 52 is fixed to the other end of the sheath body 42 protruding from the coiled member 35.
- the sheath fixing member 52 includes a cylindrical portion 53, a plurality of, for example, four convex portions 54, a sheath concave portion 55, and an operation portion fluid path 56.
- the operation portion fluid path 56 has a bent shape.
- the operation portion fluid path 56 includes an operation portion tip opening 56f and a base communication port 56r.
- the cylindrical portion 53 is disposed in an inner hole described later of the first tube portion 61.
- the convex portions 54 protrude from the outer peripheral surface of the cylindrical portion 53 and are formed at equal intervals in the circumferential direction (at intervals of 90 degrees in FIG. 9).
- the outer peripheral surface of the convex portion 54 is disposed in contact with the inner peripheral surface of the operation unit exterior body 51.
- the operation portion exterior body 51 and the sheath fixing member 52 are integrally fixed by a fixing screw 57. Therefore, one of the plurality of convex portions 54 is a fluid convex portion 54a, and the remaining convex portions 54 are fixing convex portions 54b.
- a second female screw portion 54bf into which the fixing screw 57 is screwed is formed on the outer peripheral surface side of the fixing convex portion 54b.
- a first female screw portion 54af for screwing and fixing the fluid base 39, for example, and a base communication port 56r are formed on the outer peripheral surface side of the fluid convex portion 54a.
- a base relief hole 58 and a screw hole 59 are formed at predetermined positions on the outer peripheral surface of the operation unit exterior body 51.
- the base relief hole 58 corresponds to the fluid base 39.
- the screw hole 59 corresponds to the second female screw portion 54bf.
- the screw hole 59 has a recess where the head of the fixing screw 57 is disposed and an escape hole through which the screw portion passes.
- the sheath recess 55 is a hole formed on one end surface side of the sheath fixing member 52.
- the other end of the sheath body 42 is disposed in the sheath recess 55.
- An operation portion front end opening 56f is provided on the bottom surface of the sheath recess 55.
- the other end of the sheath body 42 is disposed in the sheath recess 55, and is fixed integrally to the sheath fixing member 52 by, for example, adhesion.
- the operation portion distal end opening 56f of the operation portion fluid path 56 and the tube proximal end opening 41r of the sheath fluid path 41 are brought into communication.
- air supplied from the fluid supply / discharge device as an external device to the fluid tube 38 is the fluid base 39, the base communication port 56r, the operation portion fluid path 56, the operation portion distal end opening 56f, the tube base end. It is supplied into the balloon 33 through the opening 41r, the sheath fluid passage 41, and the balloon opening 41f.
- the slide member 37 includes, for example, a first tube portion 61 that also serves as a grip portion and a second tube portion 62 that has a coil contact portion.
- the first tube portion 61 includes a large-diameter portion 63 that is a grip portion and a sliding portion 64 that slides with respect to the sheath fixing member 52.
- the outer diameter size of the large diameter portion 63 and the outer diameter size of the operation portion exterior body 51 are set to be substantially the same diameter.
- the outer diameter dimension of the sliding portion 64 is smaller than the outer diameter dimension of the large diameter portion 63.
- the sliding portion 64 is set so as to be engaged with the axial through hole 51h of the operation portion exterior body 51 with a predetermined fit. Therefore, the sliding part 64 can smoothly advance and retreat in the axial through hole 51 h of the operation part exterior body 51.
- the sliding part 64 has a sliding hole 65.
- the sliding hole 65 includes an inner hole 66 in which the cylindrical portion 53 is disposed, and four cutouts 67 respectively corresponding to the four convex portions 54.
- the axis of the inner hole 66 coincides with the longitudinal axis of the slide member 37.
- An opening is provided at the distal end surface of the sliding portion 64.
- the position of the bottom surface of the inner hole 66 is the same position as the one end face of the large-diameter portion 63 or a position deeper than the one end face by a predetermined dimension as indicated by a broken line.
- the notch 67 is a radial groove that communicates the inner hole 66 with the outer peripheral surface.
- the length dimension of the notch 67 is set to be the same as the movement amount for bringing the coil-shaped member 35 into a close contact state, or longer by a predetermined amount than the movement amount.
- the second cylinder portion 62 includes an axial through hole 68 and a recess 69.
- the sheath body 42 can pass through the axial through hole 68.
- the other end of the coil-shaped member 35 surrounded by the sheath body 42 is disposed in the recess 69.
- the central axis of the axial through hole 68 and the central axis of the recess 69 are coaxial with the longitudinal axis of the second cylindrical portion 62.
- Reference numeral 69b is a bottom surface.
- the bottom surface 69 b is a contact surface with the other end surface of the coiled member 35.
- the second cylindrical portion 62 is integrally fixed to the first cylindrical portion 61 by bonding, screwing, or a screw that is a fastening member.
- the slide member 37 in which the first tube portion 61 and the second tube portion 62 are integrally fixed is slidable with respect to the operation portion main body 36 in which the operation portion exterior body 51 and the sheath fixing member 52 are integrated.
- the hardness of the catheter insertion part 31 becomes the soft first flexibility.
- the other end surface of the second cylindrical portion 62 of the slide member 37 abuts on one end surface of the sheath fixing member 52 of the operation portion main body 36.
- the coil-shaped member 35 surrounded by the sheath body 42 has a natural length. Therefore, the hardness of the catheter insertion portion 31 is soft.
- the hardness of the catheter insertion part 31 becomes a hard second flexibility.
- the catheter operation portion 32 is in the second operation state
- one end surface 63f of the first tube portion 61 constituting the first tube portion 61 of the slide member 37 contacts the other end surface 51r of the operation portion exterior body 51 of the operation portion main body 36. Touch.
- the coil-shaped member 35 surrounded by the sheath body 42 is compressed and brought into a close contact state. Therefore, the hardness of the catheter insertion portion 31 is hard.
- the catheter insertion unit 31 moves the slide member 37 of the catheter operation unit 32 back and forth to change between the first operation state and the second operation state, whereby the first flexibility and the second flexibility are achieved. It is the composition which can be obtained.
- the first flexibility and the second flexibility in the present embodiment are the same as the case where the hardness of the treatment instrument insertion portion 122 described above is soft or hard. Specifically, when the catheter insertion portion 31 is first flexible, even when the catheter insertion portion 31 is inserted into the treatment instrument channel in the bending portion 16 of the endoscope insertion portion 11, As the bending operation device 18 is operated, the bending portion 16 smoothly bends to a desired bending state. On the other hand, when the catheter insertion portion 31 is second flexible, the endoscope insertion portion 11 can be advanced and retracted along the bent catheter insertion portion 31.
- the coil-shaped member 35 when the catheter operation section 32 is in the first operation state, the coil-shaped member 35 is placed between one end of the coil-shaped member 35 and the contact surface 43r or the coil-shaped member so that the coil-shaped member 35 has a natural length.
- the length of the coil-shaped member 35 and the distance from the bottom surface 69b to the contact surface 43r are set so that a gap is formed in either one of the other end of the surface 35 and the bottom surface 69b.
- the operation of the endoscope system 1 including the catheter 3 and the endoscope 2 configured as described above will be described.
- a procedure for inserting the endoscope insertion portion 11 from the duodenum 110 into the biliary tract 111 as shown in FIG. 10 will be described.
- the surgeon inserts the distal end portion 15 of the endoscope insertion portion 11 up to the vicinity of the biliary tract exit 112, which is a duodenal opening of the biliary tract 111, in performing the above procedure.
- the first flexible catheter insertion portion 31 is inserted into the treatment instrument channel included in the endoscope insertion portion 11.
- the surgeon performs an appropriate bending operation on the bending operation device 18 provided in the endoscope operation unit 12 so that the distal end surface of the distal end portion 15 faces the biliary tract outlet 112. Thereafter, the surgeon performs the catheter introduction procedure, the catheter fixation procedure, and the insertion portion introduction procedure to place the endoscope insertion portion 11 in the biliary tract 111.
- the surgeon leads the distal end portion of the first flexible catheter insertion portion 31 from the opening of the treatment instrument channel. Then, the surgeon places the distal end portion of the catheter insertion portion 31 in the vicinity of the outlet 112 of the biliary tract 111. Thereafter, the surgeon inserts the catheter insertion portion 31 into the biliary tract 111 in a predetermined amount from the distal end surface of the endoscope insertion portion 11. Thus, the balloon 33 provided in the catheter insertion portion 31 is disposed at a desired position in the biliary tract 111.
- the surgeon supplies air to the balloon 33 through the fluid tube 38 from the fluid supply / discharge device which is an external device. Then, as shown by the solid line in FIG. 10, the balloon 33 expands and comes into close contact with the inner wall of the biliary tract 111 with a predetermined adhesion force. As a result, the catheter insertion portion 31 is fixed at a desired position in the biliary tract 111.
- the surgeon changes the operation state of the catheter operation unit 32 from the first operation state to the second operation state in order to change the first flexible catheter insertion portion 31 to the second flexibility.
- Perform the operation Specifically, as shown in FIG. 11, the surgeon uses the left hand to hold, for example, the first cylindrical portion 61 held with the right hand against the elastic force of the coiled member 35 as indicated by an arrow Y11 in the longitudinal axis direction. A hand operation is performed for moving toward the gripped operation unit exterior body 51. Then, the surgeon brings the one end surface 63 f of the first tube portion 61 into contact with the other end surface 51 r of the operation unit exterior body 51.
- the second cylinder part 62 is advanced in the direction of the balloon 33, and the bottom surface 69 b of the second cylinder part 62 that advances is in contact with the other end of the coil-shaped member 35. Thereafter, the distance between the contact surface 43r and the bottom surface 69b becomes shorter as the second cylindrical portion 62 moves forward. Then, as described above, the natural length coil-shaped member 35 is compressed and brought into a close contact state. As a result, the hardness of the catheter insertion portion 31 is switched to the second flexibility.
- the surgeon advances the endoscope insertion portion 11 along the catheter insertion portion 31 and guides it into the biliary tract 111.
- the catheter insertion portion 31 is second flexible, the bent shape of the catheter insertion portion 31 is held in a large bent shape R.
- the distal end portion 15 of the endoscope insertion portion 11 is inserted to a desired position in the biliary tract 111 along the catheter insertion portion 31 as indicated by a two-dot chain line in the figure.
- the surgeon continues to perform a catheter introduction procedure toward the deep part of the biliary tract of the catheter insertion portion 31 or to remove the catheter insertion portion 31 from the treatment instrument channel.
- the surgeon performs an operation of returning the operation state of the catheter operation unit 32 from the second operation state to the first operation state, thereby returning the catheter insertion unit 31 to the first flexibility.
- the surgeon performs a hand operation to move the first tube portion 61 held with the right hand in the direction opposite to the arrow Y11 using the elastic force of the coiled member 35 as auxiliary power.
- the catheter insertion part 31 will return to 1st flexibility, if the other end surface 62r of the 2nd cylinder part 62 contact
- the slide member 37 is configured to be movable back and forth with respect to the operation portion main body 36.
- the catheter insertion portion 31 has a soft first flexibility, and the first tube portion 61 and the operation portion exterior
- the catheter insertion portion 31 is configured to have a second flexibility in which the hardness of the catheter insertion portion 31 is hard.
- the flexibility of the catheter insertion portion 31 can be easily changed from the first flexibility to the second flexibility by a one-action operation for moving the slide member 37 forward or backward in the longitudinal axis direction of the catheter operation portion 32.
- the second flexibility can be switched to the first flexibility.
- a gap is formed between one end of the coil-shaped member 35 and the contact surface 43r or between the other end of the coil-shaped member 35 and the bottom surface 69b. It is supposed that the catheter insertion part 31 becomes 1st flexibility because the shape member 35 becomes natural length. However, the first flexibility of the catheter insertion portion 31 is obtained with one end of the coiled member 35 and the contact surface 43r in contact with each other and the other end of the coiled member 35 and the bottom surface 69b in contact with each other. It may be.
- a locking claw having a collar as a locking member that is, a so-called hook (not shown) is provided on one of the operation unit exterior body 51 or the first tube unit 61, and the operation unit exterior body 51 or the first tube unit A locking portion, a so-called rod-shaped convex portion (not shown), is provided as a locked member to which the hook portion of the locking claw is hooked on one side of 61.
- the catheter operation part 32 can be hold
- the first flexible catheter insertion portion 31 is changed to the second flexibility.
- the balloon 33 is inflated without operating the catheter operation portion 32, and at the same time, the hardness of the catheter insertion portion 31A is changed to be harder than the first flexibility. Can do.
- the catheter insertion portion 31A includes a first balloon 33A and a second balloon 33B.
- the first balloon 33A is provided on the distal end side of the sheath main body 42A and functions in the same manner as the balloon 33.
- the second balloon 33B is disposed in the gap between the sheath body 42A and the coiled member 35.
- the sheath main body 42 ⁇ / b> A includes a sheath fluid path 41.
- the sheath fluid passage 41 includes a second balloon opening 41f2 in addition to the first balloon opening 41f1.
- the first balloon opening 41f1 is provided in the first balloon mounting range on the distal end side of the sheath body 42.
- the second balloon opening 41f2 is provided in the second balloon mounting range at the center of the sheath body 42.
- the balloons 33A and 33B have a pipe shape, for example. The distal end side and the proximal end side of the balloons 33A and 33B are fixed to the outer peripheral surface of the sheath main body 42 by bonding or thread winding bonding.
- air supplied from the fluid supply / discharge device as an external device to the fluid tube 38 is the fluid base 39, the base communication port 56r, the operation portion fluid path 56, the operation portion distal end opening 56f, the tube base end. After the opening 41r and the sheath fluid path 41 are supplied, the air is supplied into the first balloon 33A through the first balloon opening 41f1 and into the second balloon 33B through the second balloon opening 41f2. Supplied.
- the surgeon guides the distal end portion of the first flexible catheter insertion portion 31 from the opening of the treatment instrument channel. Then, the surgeon places the distal end portion of the catheter insertion portion 31 in the vicinity of the outlet 112 of the biliary tract 111. Thereafter, the surgeon inserts the catheter insertion portion 31 into the biliary tract 111 in a predetermined amount from the distal end surface of the endoscope insertion portion 11. As a result, the first balloon 33 ⁇ / b> A provided in the catheter insertion portion 31 is disposed at a desired position in the biliary tract 111.
- the surgeon supplies air from the fluid supply / discharge device, which is an external device, via the fluid tube 38.
- the first balloon 33 ⁇ / b> A expands and comes into close contact with the inner wall of the biliary tract 111 with a predetermined contact force.
- the catheter insertion portion 31A is fixed at a desired position in the biliary tract 111.
- the second balloon 33B is inflated in the gap between the sheath body 42A and the coiled member 35.
- the outer peripheral surface of the second balloon 33 ⁇ / b> B comes into close contact with the inner surface of the coiled member 35.
- the coil or more member 35 is difficult to move with respect to the sheath body 42A, and the catheter insertion portion 33A is difficult to bend.
- the hardness of the catheter insertion portion 31A becomes harder than the first flexibility.
- the first balloon 33A and the second balloon 33B are provided in the catheter insertion portion 31A, and the first balloon opening 41f1 and the second balloon opening 41f2 are provided in the sheath fluid path 41.
- the second balloon 33B can be inflated at the same time as the first balloon 33A is inflated, and the catheter insertion portion 31A can be hardened to easily obtain the second flexibility.
- a tube body (not shown) that prevents the coiled member 35 from expanding in diameter is provided on the outer peripheral side of the coiled member 35 so that the outer peripheral surface of the second balloon 33B and the inner surface of the coiled member 35 are in close contact with each other. It is advisable to prevent the performance from deteriorating.
- the distal end side of the coil-shaped member 35 of the catheter insertion portion 31 may be formed as shown in FIG. 12A, FIG. 12B or FIG. 13 to improve the bending performance from the duodenum 110 to the biliary tract 111.
- the coil-like member 35A of the catheter insertion portion 31 shown in FIG. 12A is wound at a predetermined pitch with the upper side, which is the short side of the trapezoidal element wire 71, directed toward the central axis direction. It is.
- the coil-shaped member 35A has a predetermined elastic force, is deformed to a predetermined compression length with a predetermined natural length.
- a bending characteristic changing portion is provided in the distal end side winding portion 72 of the coiled member 35A.
- the bending characteristic changing portion is formed by forming a cut portion 73 indicated by hatching in half of the entire circumference of the distal end side winding portion 72, for example, the upper half in the figure, and the remaining portion is an unprocessed portion.
- the distal end side winding portion 72 has a large bending characteristic when compared with a case where the distal end side winding portion 72 is bent in a direction where the cutting portion 73 is provided and a case where the leading end side winding portion 72 is bent in a direction where the cutting portion 73 is not provided. It has changed. Specifically, the bending toward the excision part 73 can be performed more easily than the curving in the direction where the excision part 73 is not provided.
- the distal-side winding portion 72 is a portion that is disposed in the proximal bending piece of the bending portion 16 from the distal end of the distal end portion 15 that constitutes the endoscope insertion portion 11.
- the surgeon performs the procedure of inserting the endoscope insertion portion 11 from the duodenum 110 into the biliary tract 111 with the catheter 3 including the coil insertion member 35A in the catheter insertion portion 31.
- the surgeon arranges the distal end side winding portion 72 from the distal end of the endoscope insertion portion 11 into the bending portion 16, and also in the bending portion 16 so that the excision portion 73 faces the biliary direction in the duodenum. Arrange for orientation.
- the surgeon inserts the distal end portion 15 of the endoscope insertion portion 11 up to the vicinity of the biliary tract exit 112 of the biliary tract 111. Thereafter, the surgeon performs a bending operation on the bending operation device 18 provided in the endoscope operation unit 12. Then, the cutting part 73 is provided in the front end side winding part 72 of the coil-shaped member 35A, so that the bending part 16 is easily bent. As a result, the distal end surface of the distal end portion 15 can be smoothly opposed to the biliary tract outlet 112.
- the cut portion 73 is provided in the distal end side winding portion 72 of the coil-shaped member 35A, and the cut portion 73 is arranged in a predetermined direction in the treatment instrument channel in the bending portion 16. Then, the surgeon can bend the bending operation device 18 with a small amount of bending force, and can smoothly bend the bending portion 16 in which the coil-shaped member 35A is disposed in the treatment instrument channel.
- the cutting part which makes the semicircle shape the half of the perimeter of the front end side winding part of the coil-shaped member 35 of the said embodiment is formed, and the curve characteristic of the front end side winding part of the coil-shaped member 35 is changed. You may do it.
- the configuration of the coil-shaped member of the catheter insertion portion is not limited to the above-described configuration, and the wire diameter of the distal-side winding portion 72 of the coil-shaped member 35B is periodically changed from a small diameter to a large diameter. You may make it form by winding the coil to perform.
- the distal end side winding portion 72A of the coil-like member 35B shown in FIG. 13 is configured by winding a strand whose strand diameter changes periodically.
- the distal end side winding portion 72A includes a thin wire winding portion 75 formed of a thin wire having a thin wire diameter in the upper half in the figure, which is half the entire circumference, and the wire diameter is smaller than that of the thin wire.
- a large-diameter wire winding portion 76 formed of a large-diameter strand having a predetermined large diameter is provided in the lower half of the figure.
- the thin wire The bending toward the winding portion 75 can be performed more easily than the bending toward the large-diameter wire winding portion 76. As a result, the same operation and effect as the above-described coiled member 35A can be obtained.
- the excision part may be arranged only in a range from a position 100 mm from the catheter tip to 180 mm. According to this configuration, since the catheter travels along the shape of the body lumen, the catheter can be stably fixed.
- FIG. 14 shows an endoscope system 220 including an endoscope 200 and a balloon-equipped catheter 210.
- the endoscope 200 includes a first bending portion 201 and a second bending portion 202 in the endoscope insertion portion 203.
- a balloon 213 is provided at the distal end portion 212 constituting the catheter insertion portion 211 of the balloon-equipped catheter 210.
- the balloon 213 is in an inflated state and is fixed in close contact with the wall of the biliary tract 111.
- the surgeon performs an operation of bending the second bending portion 202 provided in the endoscope insertion portion 203 of the endoscope 200, and at the same time, for example, the assistant inserts the catheter insertion portion 211 of the balloon-equipped catheter 210 with an assistant. Pull back.
- the catheter insertion portion 211 is changed to a state in which the catheter insertion portion 211 is tensioned by a predetermined tension by the pulling back operation of the assistant.
- the second bending portion 202 is bent in accordance with the bending operation of the second bending portion 202 of the surgeon.
- the first bending portion 201 that is in a bending-free state moves along the catheter insertion portion 211 that has changed to a stretched state, and is inserted and arranged in the biliary tract 111.
- the first bending portion 201 and the second bending portion 202 in the bending-free state can be introduced to the vicinity of the balloon 213 in the biliary tract along the catheter insertion portion 211.
- the endoscope with the second bending portion includes a first bending portion and a second bending portion, and the surgeon alone can simultaneously perform the operation of bending the second bending portion and the operation of pulling back the catheter insertion portion.
- the 17 is configured to include an elongated insertion portion 141, an operation portion 142, and a universal cord 143 extending from the side portion of the operation portion 142.
- the second bending portion endoscope 140 shown in FIG. The insertion portion 141 and the universal cord 143 have flexibility.
- the operation unit 142 is provided on the proximal end side of the insertion unit 141.
- An endoscope connector 144 is provided at the end of the universal cord 143.
- the endoscope connector 144 is detachably connected to an external device such as a light source device (not shown).
- the insertion portion 141 is configured by connecting a distal end portion 145, a first bending portion 146, a second bending portion 147, and a flexible flexible tube portion 148 in order from the distal end side.
- the first bending portion 146 is connected to the proximal end side of the distal end portion 145.
- the second bending portion 147 is connected to the proximal end side of the first bending portion 146.
- the first bending portion 146 includes a bending portion set configured such that a plurality of bending pieces are connected to be able to bend in the vertical and horizontal directions, for example.
- the second bending portion 147 includes a bending portion set configured such that a plurality of bending pieces are connected to bend in the vertical direction.
- Reference numeral 149 denotes a treatment instrument insertion port.
- the catheter insertion portion 251 of the catheter 250 with a balloon, which is a treatment tool is inserted into a treatment tool channel (not shown) via the treatment tool insertion port 149 and led out into the body.
- the catheter insertion portion 251 of the present embodiment includes a plurality of holding portions 252 on the proximal end side of the insertion portion that is disposed outside the treatment instrument insertion port 149.
- the holding part 252 is a convex part protruding from the catheter insertion part 251.
- the holding part 252 is a spherical part, for example.
- the operation unit 142 is provided with a first operation device 150 and a second operation device 160.
- the first operating device 150 includes an up / down bending knob 151 and a left / right bending knob 152 for bending the first bending portion 146.
- the second operating device 160 includes an up / down bending knob 161 for bending the second bending portion 147 and a catheter advance / retreat knob (hereinafter abbreviated as an advance / retreat knob) 162 for advancing / retreating the catheter insertion portion 251.
- the up and down bending knob 151 is, for example, in a ring shape, and causes the first bending portion 146 to bend in the up and down direction in accordance with the turning operation.
- the left / right bending knob 152 has, for example, a ring shape smaller in diameter than the up / down bending knob 151.
- the left / right bending knob 152 causes the first bending portion 146 to bend in the left / right direction in accordance with the turning operation.
- the up / down bending knob 151 bends the first bending portion 146 upward, for example, by rotating counterclockwise.
- the left / right bending knob 152 bends the first bending portion 146 to the right, for example, by rotating counterclockwise.
- the up / down bending knob 161 also has a ring shape, for example, and causes the second bending portion 147 to bend in the up / down direction. Specifically, the up / down bending knob 161 bends the second bending portion 146 upward by being rotated counterclockwise.
- the advance / retreat knob 162 has a ring shape larger in diameter than the up / down bending knob 161.
- the advance / retreat knob 162 advances and retracts the catheter insertion portion 251 in accordance with the turning operation.
- the advance / retreat knob 162 includes a plurality of protrusions 163 protruding from the outer peripheral surface. For example, five protrusions 163 are provided on the outer periphery, and are arranged at equal intervals in the circumferential direction. Note that the number of the protrusions 163 is not limited to five, and may be less or more.
- the protrusion 163 has a catheter insertion portion holding portion 164.
- the catheter insertion portion holding portion 164 includes an insertion portion arrangement groove 165 and a holding hole 166.
- the insertion portion arrangement groove 165 is a groove that is elongated in the circumferential direction.
- the holding hole 166 is formed at the center of the groove 165.
- a holding portion 252 is disposed in the holding hole 166.
- a catheter insertion portion 251 is arranged in the insertion portion arrangement groove 165.
- the interval between the holding portions 252 provided in the catheter insertion portion 251 matches the interval between the holding holes 166 provided in the adjacent protrusions 163 formed in the advance / retreat knob 162.
- the catheter insertion portion 251 is pulled by rotating the advance / retreat knob 162 counterclockwise in a state where the holding portion 252 is disposed in the holding hole 166 of the protruding portion 163. Then, by continuously rotating the advance / retreat knob 162 in the counterclockwise direction, the holding portion 252 positioned on the treatment instrument insertion port 149 side is disposed in the holding hole 166 of the adjacent protrusion 163, and the catheter insertion portion 251 is further pulled. Is done.
- the second operating device 160 includes an up / down bending knob 161, an advance / retreat knob 162, and a linear motion link mechanism 172.
- Reference numeral 300 denotes an independent / circular rotation mechanism that constitutes a selective power transmission mechanism described later.
- the up / down bending knob 161 is fixed to the first knob shaft 170a.
- the advance / retreat knob 162 is fixed to the second knob shaft 170b.
- the second knob shaft 170b is a pipe-shaped member.
- the first knob shaft 170a is a cylindrical member.
- shaft 170a is rotatably arrange
- the distal end side of the first knob shaft 170a is configured to protrude from the distal end of the second knob shaft 170b by a predetermined amount.
- a ring-shaped member 171 having a through-hole 173 is provided at a predetermined position on the distal end side of the first knob shaft 170a via an integral fastening member (not shown) or a communication hole (reference numeral 312) described later. Fixed directly to.
- the through hole 173 has a stepped shape having a recess 174 and a communication hole 175. In the recess 174, the independent / spinning rotation mechanism 300 is disposed.
- the communication hole 175 communicates the recess 174 with the outside.
- the ring-shaped member 171 is provided with a protrusion 172 ⁇ / b> L that constitutes a linear motion link mechanism 172.
- the protrusion 172L is provided at a predetermined position with respect to the ring-shaped member 171.
- the advancing / retreating knob 162 and the catheter insertion portion 251 which are not shown because they are located behind the arrow Y20-Y20 line of FIG. 19 are indicated by broken lines.
- the ring-shaped member 171 and the protrusion 172L may be an integral structure or a separate structure.
- the ring-shaped member 171 and the projecting portion 172L are separate bodies, the ring-shaped member 171 and the protrusion 172L are integrally formed by screwing with a screw member, adhesion, welding, or the like.
- the linear motion link mechanism 172 is mainly configured to include a protrusion 172L, a driving force transmission rod 176, a sliding member 177, and a pair of connecting pins 178.
- the protrusion 172L includes a protrusion 172La.
- a connecting pin 178 protrudes from the convex portion 172La.
- One end of a driving force transmission rod 176 is rotatably connected to the connecting pin 178.
- the sliding member 177 is slidably disposed in a sliding groove 179 provided in the operation unit 142.
- a connecting pin 178 also projects from one surface side of the sliding member 177.
- the other end of the driving force transmission rod 176 is rotatably connected to the connecting pin 178.
- a proximal end portion of a second bending portion upward pulling wire (hereinafter abbreviated as a second bending portion wire) 180 is fixed to the distal end side end portion of the sliding member 177.
- the other end of the second bending portion wire 180 is fixed at a predetermined position of a distal bending piece constituting a bending portion set (not shown) of the second bending portion 147.
- the second bending portion 147 has the maximum in the upward direction by moving the sliding member 177 constituting the linear motion link mechanism 172 to the left end side indicated by the solid line in the drawing of the sliding groove 179. Bends.
- the vertical bending knob 161 is configured to be fixed at a desired rotational position by a knob (see reference numeral 161a in FIG. 17). Further, the second bending portion 147 of the present embodiment is configured to bend only in one upward direction by operating the up / down bending knob 161.
- the independent / circular rotation mechanism 300 As shown in FIGS. 21 and 22, the independent / turning rotation mechanism unit 300 includes a first rotating body 301 and a rotational force transmission switching unit 302.
- the first rotating body 301 is a rectangular parallelepiped having a square cross section, and includes a central through hole 303.
- the second knob shaft 170b is inserted into the central through hole 303.
- the first rotating body 301 is integrally fixed to a predetermined position of the longitudinal axis of the second knob shaft 170b by, for example, a screw member.
- the rotational force transmission switching unit 302 includes a second rotating body 304, a case body 305, a moving member 306, and a ball portion 307.
- the second rotating body 304 is a cylindrical member.
- the second rotating body 304 is integrally fixed to the recess 174 constituting the through hole 173 of the ring-shaped member 171 by screwing with a screw member, adhesion, welding, or the like.
- the second rotating body 304 is formed with a first rotating body disposing recess (hereinafter abbreviated as disposing recess) 311 and a communication hole 312.
- the arrangement recess 311 has, for example, a regular square cross section.
- the communication hole 312 communicates the arrangement recess 311 with the outside.
- the first rotating body 301 is rotatably arranged in the arrangement recess 311.
- the tip of the second knob shaft 170b is rotatably disposed in the communication hole 312. Note that only the first knob shaft 170a may pass through the communication hole 312.
- the case body 305 has a two-body structure, for example, and includes a case main body 321 and a lid body 322.
- the case main body 321 has a recessed part, for example.
- the case main body 321 is integrally fixed to the second rotating body 304 by screwing with a screw member, adhesion, welding, or the like.
- the lid 322 is integrally fixed to the case main body 321 by screwing with a screw member, adhesion, welding, or the like.
- the case body 321 is formed with a through hole 323 through which the second knob shaft 170b is rotatably inserted.
- the case body 321 is formed with a plurality of elongated holes 325 that are a plurality of elongated through holes from the outside of the case body toward the central axis of the through hole 323.
- the plurality of long holes 325 are formed at intervals of 90 degrees in the circumferential direction around the central axis of the through-hole 323 according to the cross-sectional shape of the arrangement recess 311.
- the lid body 322 is formed with a through hole 324 through which the second knob shaft 170b is rotatably inserted.
- the moving member 306 is a stepped columnar member having a substantially T-shaped cross section.
- the moving member 306 includes, for example, a large diameter part 331 and a small diameter part 332.
- the large-diameter portion 331 is a sliding portion that is slidably disposed in a space portion 326 configured by the case main body 321 and the lid body 322.
- the small diameter portion 332 passes through the long hole 325 and is disposed in the placement recess 311.
- the large diameter part 331 is slidable in the space part 326, and the small diameter part 332 is slidable with respect to the long hole 325. That is, the moving member 306 is movable along the long hole 325.
- the ball portion 307 is fixed to the distal end portion of the small diameter portion 332 of the moving member 306.
- the diameter of the sphere 307 is set to a predetermined dimension. Specifically, the diameter of the ball portion 307 is set based on the gap between the inner side surface 313 of the arrangement recess 311 and the outer side surface 308 of the first rotating body 301 that are arranged to face each other.
- the independent / circular rotating mechanism section 300 causes the outer surface 308 of the first rotating body 301 to be in contact with the spherical portion 307. Abut. Thereafter, when the first rotating body 301 is further rotated clockwise, the ball portion 307 moves along the long hole 325 as indicated by an arrow Y23b.
- the ball portion 307 is moved to the corner of the arrangement recess 311 as indicated by an arrow Y24 in FIG.
- the first rotating body 301 independently rotates clockwise without being blocked by the ball portion 307.
- FIGS. 23 and 24 A broken circle shown in FIGS. 23 and 24 is an angular movement locus of the first rotating body 301.
- the case main body 321 is provided with a recess that constitutes the space portion 326, but the lid 322 may be provided with the space portion 326 to provide a recess.
- the second rotating body 304 After the contact, the second rotating body 304 further rotates in the same direction, whereby the ball portion 307 is held between the inner side surface 313 and the outer side surface 308 as shown in FIG. That is, the second rotating body 304 and the first rotating body 301 are integrated with the ball portion 307 interposed therebetween.
- the rotational driving force of the second rotating body 304 is transmitted to the first rotating body 301 via the ball portion 307. Then, along with the counterclockwise rotation indicated by the arrow 25a of the second rotating body 304, the first rotating body 301 also rotates counterclockwise as indicated by the arrow 25c. That is, the first rotating body 301 is rotated in the same direction as the second rotating body 304 rotates.
- the first rotating body 301 of the independent / spinning rotation mechanism 300 configured as described above is integrally fixed to the second knob shaft 170b of the advance / retreat knob 162.
- the second rotating body 304 of the independent / circular rotating mechanism 300 is fixed integrally with the first knob shaft 170 a of the up and down bending knob 161 via the ring-shaped member 171 and the integral fastening member 181.
- the up-and-down bending knob 161 is operated counterclockwise in FIG. 17 by the surgeon, the ring-shaped member 171 integrated with the first knob shaft 170a is rotated counterclockwise.
- the second rotating body 304 integrated with the concave portion 174 of the ring-shaped member 171 rotates counterclockwise, and the protrusion 172L integrated with the linear motion link mechanism 172 rotates counterclockwise.
- the first rotating body 301 rotates in the same direction as the second rotating body 304 rotates, and the second bending portion 147 bends upward, while the advance / retreat knob. 162 is rotated counterclockwise and the catheter insertion portion 251 is pulled.
- the independent / spinning rotation mechanism unit 300 is provided in the second operating device 160 that constitutes the second bending portion-equipped endoscope 140 of the present embodiment.
- the surgeon selects the operation of the advance / retreat knob 162 to select only the operation of moving the catheter insertion portion 251 alone, and the operation of the up / down bending knob 161 to select the upward bending operation of the second bending portion 147.
- the cross-sectional shape of the first rotating body 301 is a regular square
- the cross-sectional shape is not limited to a regular square, and may be a regular triangle, a regular hexagon, a regular octagon, or the like.
- positioned is not limited to a regular square, It is comprised corresponding to the shape of the 1st rotary body 301.
- the advance / retreat knob 162 is rotated counterclockwise in accordance with the counterclockwise rotation operation of the up / down bending knob 161.
- the forward / backward knob 162 may be rotated clockwise or counterclockwise in accordance with the clockwise operation of 161.
- the surgeon uses a balloon 213 provided at the distal end portion 212 of the catheter insertion portion 211 of the balloon-attached catheter 210 led out from the endoscope 140. Then, as shown in FIG. 14, it is in an inflated state and tightly fixed to the wall of the biliary tract 111. After this state, the surgeon performs an operation of rotating the up / down bending knob 161 counterclockwise. Then, the second bending portion 147 of the second bending endoscope 140 is bent upward, and the catheter insertion portion 211 of the balloon-equipped catheter 210 is pulled back.
- the first bending portion 146 that is in a bending free state moves along the catheter insertion portion 211 that has changed to a stretched state.
- the distal end sides of the distal end portion 145 and the first bending portion 146 are inserted and arranged in the biliary tract 111 as shown in FIG.
- the first operation device 150 that performs the bending operation of the first bending portion 146 on the operation portion 142 of the second bending portion-equipped endoscope 140 including the first bending portion 146 and the second bending portion 147
- a second operation device 160 is provided for bending the second bending portion 147 and moving the catheter insertion portion 251 of the balloon-equipped catheter 250 forward and backward.
- the second operating device 160 is provided with an independent / circular rotation mechanism 300 that pulls the catheter insertion portion 251 located outside the treatment instrument insertion port 149 in conjunction with the bending operation of the second bending portion 147.
- the balloon 33 provided in the catheter insertion portion 31 is inflated and is fixedly disposed in close contact with the wall of the biliary tract 111.
- the balloon 33 it is also conceivable to arrange the balloon 33 at the left and right hepatic duct confluence 115 that branches into the right hepatic duct 113 and the left hepatic duct 114, which are part of the biliary tract 111 as shown in FIG.
- the left and right hepatic duct confluence portion 115 is a space that is particularly wide in the biliary tract 111.
- a balloon 33A shown in FIG. 28A has a pipe shape having a large-diameter balloon distal end surface 131 on the distal end side.
- the balloon tip surface 131 is configured such that its wall thickness is set to be thicker than the wall thickness of other parts of the balloon 33A. Therefore, as described above, when air is supplied from the fluid supply / discharge device into the balloon 33A via the fluid tube, the periphery of the balloon tip surface 131 expands before the balloon tip surface 131 expands.
- the balloon 33A is inflated into a conical shape having a large diameter at the tip side and gradually becoming a small diameter as it goes to the hand side. That is, the balloon 33A is inflated into a conical shape with the balloon distal end surface 131 disposed in the left and right hepatic duct merging portion 115, whereby the side peripheral surface of the balloon 33A is caught by the wall of the left and right hepatic duct merging portion 115.
- the inflated balloon 33A is stably held and arranged without dropping from the left and right hepatic duct confluence 115 into the common bile duct 116.
- the catheter insertion part 31 is arrange
- the side peripheral surface of the balloon 33A is in close contact with the wall of the biliary tract 111, and the catheter insertion portion 31 is fixedly disposed in the biliary tract 111.
- the shape when the balloon is inflated is not limited to a conical shape having a large diameter on the distal end side and a small diameter on the proximal side, and may be a balloon 33B that expands into a Y shape as shown in FIG. 28B.
- the balloon 33B includes a right hepatic tube placement balloon portion 132 and a left hepatic tube placement balloon portion 133 located on the distal end side, and a total hepatic tube placement balloon portion 134 located on the proximal side, and is formed in a substantially Y shape. Yes. As described above, when air is supplied from the fluid supply / discharge device into the balloon 33B through the fluid tube, the right hepatic tube placement balloon portion 132 located on the distal end side is placed in the right hepatic tube 113 as shown in FIG.
- the left hepatic duct placement balloon part 133 is inflated in the left hepatic duct 114 while the total hepatic duct placement balloon part 134 is inflated in the total hepatic duct 116.
- the balloon 33B is inflated into a Y shape.
- the side surface of the right hepatic tube placement balloon part 132 and the side surface of the left hepatic tube placement balloon unit 133 constituting the balloon 33 ⁇ / b> B are caught on the wall of the left and right hepatic tube joining part 115.
- the inflated balloon 33B is stably held and arranged without dropping from the left and right hepatic duct joining portion 115 into the total hepatic duct 116.
- the side surfaces of the right hepatic tube arranging balloon portion 132, the side surfaces of the left hepatic tube arranging balloon portion 133, and the total hepatic duct that constitute the balloon 33B In a state where the balloon 33B is arranged at a position other than the left and right hepatic duct merging portions 115, the side surfaces of the right hepatic tube arranging balloon portion 132, the side surfaces of the left hepatic tube arranging balloon portion 133, and the total hepatic duct that constitute the balloon 33B.
- the side surface of the placement balloon portion 134 is in close contact with the wall of the biliary tract 111, and the catheter insertion portion 31 is fixed in the biliary tract 111.
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Abstract
Description
まず、術者は、図1に示すように挿入部100を十二指腸110内に導入し、胆道近傍に配置する。次に、術者は、湾曲部102を湾曲させる操作を行って先端部101の先端面を胆道111の十二指腸側開口である道出口(以下、出口と記載する)112に対峙させる。その後、術者は、カテーテル導入手技、カテーテル固定手技および挿入部導入手技を行う。
術者は、先端部101の先端面に備えられている処置具チャンネル(不図示)の開口からバルーン付カテーテル120を導出させる。そして、術者は、処置具先端部121を胆道111の出口112近傍に配置する。
術者は、処置具先端部121を、胆道111内の前記位置に配置した後、処置具先端部121に設けられたバルーン123に例えば空気を供給する。バルーン123は、図2の破線に示すように膨張し、膨張したバルーン123が胆道111の内壁に密着する。この結果、バルーン付カテーテル120の処置具先端部121が、胆道111内の所望する位置に固定される。
術者は、処置具先端部121を胆道111内に固定した後、挿入部100を胆道111内に誘導する。この誘導の際、術者は、挿入部100をバルーン付カテーテル120の処置具挿入部122に沿わせるように前進させる。
なお、処置具挿入部122の硬度が軟性とは、処置具挿入部122が曲がり易い状態(第1の可撓性とも記載する)をいう。具体的に、処置具挿入部122が第1の可撓性のとき、該挿入部122が湾曲部102内を通過する処置具チャンネル内に挿通されている状態において、湾曲レバーの操作に伴って湾曲部102が所望する湾曲状態にスムーズに湾曲する。
術者は、処置具挿入部122を湾曲部102より後方側に配置した状態で、湾曲レバーを操作する。この結果、前記図1で示したように先端部101が胆道111の出口112に対峙する。その後、術者は、処置具挿入部122を湾曲されている湾曲部102内を通過させて胆道111内に挿入する。
しかしながら、特許文献1に示されている医療用カテーテルは、構成が複雑である。そして、この医療用カテーテルでは、挿入部全体をワンアクションで、硬化した状態から柔軟な状態に切り換えること、或いは、その逆に柔軟な状態から硬化した状態に切り換えることが困難である。
図7に示すように内視鏡システム1は、内視鏡2と、挿入部硬度可変バルーン付カテーテル(以下、カテーテルと略記する)3とを備えて構成されている。
なお、流体給排装置接続部は、流体口金39に限定されるものではなく、流体給排装置であるシリンジが接続されるルアー口金であってもよい。
シース34は、シース用流体路41を有する予め定めた可撓性を有するチューブ体である。シース34は、シース本体42と、シース端部43とを備えて構成されている。シース本体42にはコイル状部材35が囲繞される。シース端部43は、シース本体42の一端側に設けられている。シース端部43にはバルーン33が装着される。
なお、本実施形態において、シース本体42の長さは、コイル状部材35の自然長よりも予め定めた長さ、長く設定してある。
なお、バルーン33は、バルーン33内に供給された流体をバルーン用開口41fから排出することによって収縮して、本図に示すようにシース端部43の外周面に密着する。
操作部外装体51は、軸方向貫通孔51hを備えたパイプ形状である。軸方向貫通孔51h内の予め定められた位置にシース固定部材52が一体に固定される。また、軸方向貫通孔51h内には、スライド部材37を構成する後述する第1筒部61が摺動自在に配置される。
円筒部53は、第1筒部61の後述する内孔に配置される。凸部54は、円筒部53の外周面から突出し、周方向に等間隔(図9では90度間隔)で形成されている。凸部54の外周面は、操作部外装体51の内周面に当接して配置される。
第1筒部61は、把持部である太径部63と、シース固定部材52に対して摺動する摺動部64とを備える。本実施形態において、太径部63の外径寸法と、操作部外装体51の外径寸法とは略同径に設定されている。
第2筒部62は、第1筒部61に対して、接着、螺合或いは締結部材であるネジ等により一体に固定される。
つまり、カテーテル挿入部31は、カテーテル操作部32のスライド部材37を進退させて第1操作状態と第2操作状態とに変化させることによって、第1の可撓性と第2の可撓性とを得られる構成になっている。
具体的に、カテーテル挿入部31が第1の可撓性のとき、内視鏡挿入部11の湾曲部16内の処置具チャンネル内にカテーテル挿入部31が挿通されている状態であっても、湾曲操作装置18の操作に伴って湾曲部16が所望する湾曲状態にスムーズに湾曲する。
一方、カテーテル挿入部31が第2の可撓性のとき、屈曲形状のカテーテル挿入部31に沿って内視鏡挿入部11を進退させることが可能である。
図10に示すように内視鏡挿入部11を、十二指腸110から胆道111内に挿通させる手技に付いて説明する。
まず、執刀医は、上記手技を行うにあたって、内視鏡挿入部11の先端部15を胆道111の十二指腸開口である胆道出口112近傍まで挿入する。このとき、内視鏡挿入部11が備える処置具チャンネル内には第1の可撓性のカテーテル挿入部31が挿通されている。
しかし、コイル状部材35の一端と当接面43rとが当接すると共に、コイル状部材35の他端と底面69bとが当接した状態でカテーテル挿入部31の第1の可撓性を得る構成にしてもよい。
この構成によれば、係止爪であるフックを係止部である凸部に引っ掛けることにより、カテーテル操作部32を第2操作状態に保持することができる。
バルーン33A、33Bは、例えばパイプ形状である。バルーン33A、33Bの先端側と基端側とはシース本体42の外周面に接着、或いは糸巻き接着によって固定されている。
カテーテル導入手技において、執刀医は、第1の可撓性のカテーテル挿入部31の先端部を処置具チャンネルの開口から導出させる。そして、執刀医は、カテーテル挿入部31の先端部を胆道111の出口112近傍に配置する。その後、執刀医は、カテーテル挿入部31を内視鏡挿入部11の先端面から予め定めた量、胆道111内に挿入する。このことにより、カテーテル挿入部31に設けられている第1バルーン33Aが胆道111内の所望する位置に配置される。
なお、先端側巻回部72とは、内視鏡挿入部11を構成する先端部15の先端から湾曲部16の基端湾曲駒内に配置される部分である。
なお、上記実施形態のコイル状部材35の先端側巻回部の全周の半分を半円形状にする切除部を形成して、コイル状部材35の先端側巻回部の湾曲特性を変化させるようにしてもよい。
この構成によれば、コイル状部材35Bの先端側巻回部72Aを細径線巻き部75側に湾曲させる場合と、太径線巻き部76側に湾曲させる場合とを比較すると、細径線巻き部75側への湾曲は、太径線巻き部76側への湾曲に比べてより容易に行える。この結果、上述したコイル状部材35Aと同様の作用及び効果を得ることができる。
第1湾曲部146は、先端部145の基端側に連設する。第2湾曲部147は、第1湾曲部146の基端側に連設する。本実施形態において、第1湾曲部146は、複数の湾曲駒を連接して例えば上下左右方向に湾曲可能に構成した湾曲部組を備えている。第2湾曲部147は、複数の湾曲駒を連接して上下方向に湾曲可能に構成した湾曲部組を備えている。
本実施形態のカテーテル挿入部251は、処置具挿通口149より外部に配置される挿入部基端側に複数の保持部252を備えている。保持部252は、カテーテル挿入部251より突出した凸部である。保持部252は、例えば球状部である。
第1操作装置150は、第1湾曲部146を湾曲操作するための上下用湾曲ノブ151及び左右用湾曲ノブ152を備えている。第2操作装置160は、第2湾曲部147を湾曲操作するための上下用湾曲ノブ161及びカテーテル挿入部251を進退させるカテーテル進退ノブ(以下、進退ノブと略記する)162を備えている。
なお、突起部163の数は5つに限定されるものではなく、それ以下でもそれ以上であってもよい。
貫通孔173は、凹部174と、連通孔175とを有する段付き形状である。凹部174には、独立/供回り回転機構部300が配設される。連通孔175は、凹部174と外部とを連通する。
なお、図20においては、図19の矢印Y20-Y20線より後方に位置していることにより図示されない進退ノブ162及びカテーテル挿入部251を破線で示している。
図21、図22に示すように独立/供回り回転機構部300は、第1回転体301と、回転力伝達切替部302とを備えて構成されている。
第2回転体304は、円筒部材である。第2回転体304は、リング形状部材171の貫通孔173を構成する凹部174にネジ部材による螺合、或いは接着、溶接等によって一体に固定される。
配置凹部311内には第1回転体301が回転自在に配置される。連通孔312内には例えば第2ノブ軸170bの先端部が回動自在に配置される。なお、連通孔312内を第1ノブ軸170aだけが通過する構成にしてもよい。
太径部331は、空間部326内で摺動自在で、且つ、小径部332は長孔325に対して摺動自在である。つまり、移動部材306は、長孔325に沿って移動可能である。
本実施形態の第2湾曲付き内視鏡140において、まず、執刀医は、該内視鏡140から導出されたバルーン付カテーテル210のカテーテル挿入部211の先端部212に設けられているバルーン213を、前記図14に示したように膨張状態にして胆道111の壁に密着固定させる。この状態にした後、執刀医は、上下用湾曲ノブ161を反時計方向に回転させる操作を行う。すると、第2湾曲付き内視鏡140の第2湾曲部147が上方向に湾曲すると共に、バルーン付カテーテル210のカテーテル挿入部211が引き戻される。この結果、湾曲フリー状態である第1湾曲部146が張られた状態に変化したカテーテル挿入部211に沿って移動する。この結果、先端部145及び第1湾曲部146の先端側が前記図15に示したように胆道111内に挿入配置される。
図28Aに示すバルーン33Aは、先端側に大径バルーン先端面131を有するパイプ形状である。バルーン先端面131は、その肉厚をバルーン33Aの他の部位の肉厚に比べて厚肉に設定して構成されている。このため、上述したように流体給排装置から流体チューブを介してバルーン33A内に空気が供給されると、バルーン先端面131が膨らむ以前にバルーン先端面131の周囲が膨張していく。
なお、バルーン33Aが左右肝管合流部115以外に配置されている状態においては、バルーン33Aの側周面が胆道111の壁に密着してカテーテル挿入部31を胆道111内に固定配置する。
なお、バルーン33Bが、左右肝管合流部115以外に配置されている状態においては、バルーン33Bを構成する右肝管配置バルーン部132の側面、左肝管配置バルーン部133の側面及び総肝管配置バルーン部134の側面が胆道111の壁に密着してカテーテル挿入部31が胆道111内に固定される。
Claims (10)
- 伸縮自在で予め定めた弾性力を備え、圧縮長が予め定められ長さに設定されたコイル状部材、および流体管路を有する予め定めた可撓性のチューブ体であって、前記コイル状部材が囲繞されるシース本体及び該シース本体の一端側に設けられ前記シース本体より太径で前記コイル状部材の一端面が当接する当接面を有するシース端部を備え、前記該シース端部に前記流体管路の一開口を有し、前記シース本体の他端側に該流体管路の他開口を有するシースを具備する挿入部と、
前記シースのシース端部に設けられ、前記流体管路の一開口を介して流体が供給されることによって膨張して外径寸法が該シース端部の外径よりも大径に膨らみ、該一開口を介して流体が排出されることによって収縮して前記シース端部の外周面に密着するように構成された膨縮自在なバルーンと、
前記シースの他端側に固設され、前記流体管路を介して前記バルーン内への流体の供給、或いは該バルーン内の流体の排出を行う流体給排装置と直接、或いは間接的に接続される流体給排装置接続部を備える操作部本体、および前記操作部本体の内周面側に摺動自在に配置され、前記コイル状部材の有する弾性力によって該操作部本体の他端側に配置されるスライド部材を具備する操作部と、
を有することを特徴とする挿入部硬度可変バルーン付カテーテル。 - 前記コイル状部材は、予め定めた線経の素線を、予め定めたピッチで、予め定めた弾性力を有し、予め定めた自然長で、予め定めた圧縮長に変形するコイルスプリングであり、
前記挿入部は、前記操作部が第1操作状態において、前記シース本体に囲繞された前記コイル状部材が自然長になって硬度が軟性な第1の可撓性であり、該操作部が第2操作状態において、前記シース本体に囲繞された前記コイル状部材を密着状態にして、硬度が第1の可撓性より硬性な第2の可撓性に変化する構成であることを特徴する請求項1に記載の挿入部硬度可変バルーン付カテーテル。 - 前記コイル状部材の先端側巻回部は、全周のうち半分が切除して構成される切除部であり、全周の残り半分は未加工部であることを特徴とする請求項1に記載の挿入部硬度可変バルーン付カテーテル。
- 前記コイル状部材は、素線径が細径な細径素線と該素線径が該細径素線より予め定めた寸法太径な太径素線とに周期的に変化する素線で構成される先端側巻回部を備え、
前記先端側巻回部は、全周のうち半分が細径素線で形成された細径線巻き部で構成され、全周の残り半分が細径素線で形成された細径線巻き部で構成されることを特徴とする請求項1に記載の挿入部硬度可変バルーン付カテーテル。 - 前記切除部は、先端から100mmの位置から180mmまでの範囲にのみ配置されることを特徴とする請求項3に記載の挿入部硬度可変バルーン付カテーテル。
- 全周のうち半分が細径素線で形成されている細径線巻き部の範囲を、先端から100mmの位置から180mmまでの範囲にのみ配置されることを特徴とする請求項4に記載の挿入部硬度可変バルーン付カテーテル。
- 前記膨縮自在なバルーンは、バルーン先端面が厚肉で、バルーン膨張時には円錐形状に膨張することを特徴とする請求項1に記載の挿入部硬度可変バルーン付カテーテル。
- 前記膨縮自在なバルーンは、バルーン膨張時にY字形状に膨張することを特徴とする請求項1に記載の挿入部硬度可変バルーン付カテーテル。
- 内視鏡の挿入部の先端側に位置する第1湾曲部と、該第1湾曲部に連設する第2湾曲部とを備え、内視鏡の操作部に前記第1湾曲部を湾曲操作する湾曲ノブを含む第1操作装置と、前記第2湾曲部を湾曲操作する湾曲ノブを含む第2操作装置と、体内に導出される処置具が挿通される処置具チャンネルに連通する処置具挿通口とを備える第二湾曲部付き内視鏡において、
前記操作部に設けられる第2操作装置は、
前記湾曲ノブに加えて、前記処置具挿通口を介して体内に導出された前記処置具を進退させる進退ノブと、
前記進退ノブの操作による前記処置具の進退動作、または、前記湾曲ノブの操作による第2湾曲部を一方向に湾曲させ、且つ前記処置具を後退させる連動動作を選択的に行える選択的動力伝達機構部と、
を備えることを特徴とする第2湾曲部付内視鏡。 - 前記選択的動力伝達機構部は、独立/供回り回転機構部であって、
前記独立/供回り回転機構部は、前記進退ノブを構成する軸に一体に固定される断面形状が正多角形の第1回転体と、
前記湾曲ノブの軸に一体に固定される、前記第1回転体が回動自在に配置される断面形状が正多角形の第1回転体配置用凹部を備える第2回転体、前記第1回転体配置凹部の内側面と前記第1回転体の外側面とで形成される隙間に配置される予め定められた直径の球部、前記球部が一体に固定される小径部と、摺動部を構成する太径部とを備える複数の段付柱状部材、及び前記進退ノブの軸が通過する貫通孔、前記貫通孔の中心軸方向に細長で前記段付柱状部材の小径部が摺動自在な長孔、及び前記段付柱状部材の太径部が摺動自在に配置される空間部を有するケース体、を備えて構成される回転力伝達切替部と、
を具備することを特徴とする請求項9に記載の第二湾曲部付内視鏡。
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PCT/JP2011/076906 WO2012070570A1 (ja) | 2010-11-25 | 2011-11-22 | 挿入部硬度可変バルーン付カテーテル及び第2湾曲部付内視鏡 |
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US (2) | US20120303051A1 (ja) |
EP (1) | EP2574269B1 (ja) |
JP (1) | JP5148017B2 (ja) |
CN (2) | CN103025224A (ja) |
WO (1) | WO2012070570A1 (ja) |
Families Citing this family (12)
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WO2014208333A1 (ja) * | 2013-06-26 | 2014-12-31 | オリンパスメディカルシステムズ株式会社 | スパイラルユニット及び導入装置 |
US10398874B2 (en) | 2015-05-29 | 2019-09-03 | Covidien Lp | Catheter distal tip configuration |
US11219740B2 (en) | 2015-05-29 | 2022-01-11 | Covidien Lp | Catheter including tapering coil member |
US10357631B2 (en) | 2015-05-29 | 2019-07-23 | Covidien Lp | Catheter with tapering outer diameter |
US10327791B2 (en) * | 2015-10-07 | 2019-06-25 | Medtronic Vascular, Inc. | Occlusion bypassing apparatus with a re-entry needle and a distal stabilization balloon |
TR201611494A2 (tr) | 2016-08-16 | 2018-03-21 | Yalcin Karakoca | Sivi püskürtmeli̇, opti̇k yikamasi yapan balon katater |
US10926060B2 (en) | 2017-03-02 | 2021-02-23 | Covidien Lp | Flexible tip catheter |
US10537710B2 (en) | 2017-04-20 | 2020-01-21 | Covidien Lp | Catheter including an inner liner with a flexible distal section |
US10543345B2 (en) * | 2017-11-06 | 2020-01-28 | Easynotes Ltd. | Fluid delivery device with positionable tube |
JP7190943B2 (ja) * | 2019-03-13 | 2022-12-16 | 大阪瓦斯株式会社 | 管内操作装置 |
CN110584744B (zh) * | 2019-09-25 | 2020-11-10 | 广州创景医疗科技有限公司 | 抽吸导管装置 |
CN114904121B (zh) * | 2022-04-24 | 2023-11-17 | 广州易介医疗科技有限公司 | 一种医用导入管及其导引导管装置和桡动脉入路导管系统 |
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- 2011-11-22 EP EP11843134.5A patent/EP2574269B1/en not_active Not-in-force
- 2011-11-22 CN CN2011800358270A patent/CN103025224A/zh active Pending
- 2011-11-22 CN CN201410804149.5A patent/CN104586343B/zh not_active Expired - Fee Related
- 2011-11-22 JP JP2012527125A patent/JP5148017B2/ja active Active
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2012
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2014
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See also references of EP2574269A4 |
Also Published As
Publication number | Publication date |
---|---|
CN104586343B (zh) | 2017-06-27 |
US20150011933A1 (en) | 2015-01-08 |
US9682213B2 (en) | 2017-06-20 |
US20120303051A1 (en) | 2012-11-29 |
CN103025224A (zh) | 2013-04-03 |
CN104586343A (zh) | 2015-05-06 |
EP2574269A1 (en) | 2013-04-03 |
EP2574269B1 (en) | 2016-08-31 |
JPWO2012070570A1 (ja) | 2014-05-19 |
JP5148017B2 (ja) | 2013-02-20 |
EP2574269A4 (en) | 2014-05-07 |
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