WO2012039199A1 - 湾曲カテーテル - Google Patents
湾曲カテーテル Download PDFInfo
- Publication number
- WO2012039199A1 WO2012039199A1 PCT/JP2011/067849 JP2011067849W WO2012039199A1 WO 2012039199 A1 WO2012039199 A1 WO 2012039199A1 JP 2011067849 W JP2011067849 W JP 2011067849W WO 2012039199 A1 WO2012039199 A1 WO 2012039199A1
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- WO
- WIPO (PCT)
- Prior art keywords
- coil
- tube
- bending
- lumen
- bendable
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00064—Constructional details of the endoscope body
- A61B1/00071—Insertion part of the endoscope body
- A61B1/0008—Insertion part of the endoscope body characterised by distal tip features
- A61B1/00098—Deflecting means for inserted tools
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- 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
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/0105—Steering means as part of the catheter or advancing means; Markers for positioning
- A61M25/0133—Tip steering devices
- A61M25/0141—Tip steering devices having flexible regions as a result of using materials with different mechanical properties
-
- 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
- A61B1/04—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 combined with photographic or television appliances
- A61B1/05—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 combined with photographic or television appliances characterised by the image sensor, e.g. camera, being in the distal end portion
-
- 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
- A61M25/0074—Dynamic characteristics of the catheter tip, e.g. openable, closable, expandable or deformable
-
- 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
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/0105—Steering means as part of the catheter or advancing means; Markers for positioning
- A61M25/0133—Tip steering devices
- A61M25/0147—Tip steering devices with movable mechanical means, e.g. pull wires
Definitions
- the present invention relates to a bendable catheter that can be bent.
- EMR endoscopic mucosal resection
- ESD endoscopic submucosal dissection
- ERCP endoscopic retrograde cholangiopancreatography
- a catheter is inserted through the papilla of the duodenum, and then a contrast medium can be directly injected into the pancreatic duct or bile duct to take an X-ray photograph (see, for example, Patent Document 1).
- the lumen of the catheter which is flexible and formed in a tubular shape, is used for flowing a fluid such as a contrast medium and for inserting a medical treatment instrument such as forceps and a guide wire.
- a medical treatment instrument such as forceps and a guide wire.
- the catheter can be bent by the operation of the operator.
- the catheter is greatly curved, its lumen is blocked, and there is a possibility that fluid flow and insertion of the treatment instrument will be difficult. Therefore, it is difficult to bend the conventional catheter greatly. Since the catheter cannot be bent greatly, it is difficult to properly insert the catheter into a narrow body cavity or a body cavity branched in the middle.
- An incision treatment tool (such as a high-frequency incision tool) for excising the lesion may be inserted into the catheter.
- the catheter cannot be bent greatly, the tip of the incision treatment tool is placed at the lesion. It can be difficult to aim accurately. Therefore, a complicated operation may be required to perform an appropriate treatment on the lesion while preventing damage to the body tissue around the lesion.
- the present invention has been made in view of the above circumstances, and an object of the present invention is to provide a catheter capable of preventing the lumen from being blocked when bent greatly.
- the bendable catheter has a flexible tubular body tube having a distal end and a proximal end, a bendable bending portion provided on the distal end side of the body tube, and bends the bendable portion.
- a bending operation wire The main body tube has a first lumen and a second lumen that open to the distal end and the proximal end and communicate the distal end and the proximal end.
- the bending portion is fixed to the distal end of the main body tube, is a tubular bending tube that is more flexible than the main body tube, the distal end is disposed in the bending tube, and the proximal end communicates with the first lumen.
- the bending operation wire is inserted across the lumen of the second coil and the second lumen, and the distal end of the bending operation wire is any of the bending tube, the first coil, and the second coil. It is fixed to crab.
- the proximal end of the second coil is on the distal end side of both the opening on the distal end side in the first lumen and the opening on the distal end side in the second lumen, and the first coil is It may be fixed to the inner wall surface of one lumen.
- both the first coil and the second coil may be loosely wound.
- the main body tube and the curved tube may have light permeability.
- the main body tube includes a tubular first tube fixed to a proximal end of the first coil and having the first lumen formed therein, the first tube being inserted therein, and the first tube
- a tubular second tube having the second lumen may be provided between the tube and the tube.
- first coil may be longer in the central axis direction than the second coil.
- the second coil may be exposed inside the curved tube.
- outer surface of the second coil may be in contact with the outer surface of the first coil.
- each loop of the second coil enters between the loops of the first coil, and in the portion where the second coil enters the first coil, the strand of the first coil and the first coil Two coil wires may be alternately arranged along the central axis direction of the first coil.
- winding pitch of the strand of the first coil and the winding pitch of the strand of the second coil may be equal to each other.
- At least one of the first coil and the second coil may contain a material reflected in an X-ray fluoroscopic image.
- the tip of the first coil and the tip of the second coil may be fixed by brazing, soldering, or welding.
- the tip of the second coil and the tip of the bending operation wire may be fixed by brazing, soldering, or welding.
- the bendable catheter can be greatly bent as compared with the conventional catheter. Since the bendable catheter can be greatly bent, the bendable catheter can be appropriately and easily inserted into a thin body cavity or a body cavity branched in the middle. In addition, even when an incision treatment tool is inserted into the bendable catheter and a treatment for excising the lesioned part is performed, the bendable catheter can be greatly bent, so that the distal end of the incision treatment tool can be accurately placed on the lesioned part. Can be directed. Therefore, the lesioned part can be appropriately excised with a simple operation while preventing the body tissue around the lesioned part from being damaged.
- FIG. 2 is a cross-sectional view taken along line AA in FIG.
- FIG. 3 is a cross-sectional view taken along line BB in FIG. 2. It is sectional drawing which expands and shows a part of FIG. It is sectional drawing which expands and shows the other part of FIG. It is sectional drawing which expands and shows another part of FIG.
- FIG. 4 is a cross-sectional view taken along the line CC in FIG. 3. It is a figure showing an example of an endoscope apparatus in an embodiment of the present invention. It is a figure which shows an example of the 1st treatment tool in embodiment of this invention. It is a figure which shows an example of the 2nd treatment tool in embodiment of this invention.
- FIG. 13A It is sectional drawing which expands and shows a part of 3rd treatment tool shown to FIG. 13A. It is a schematic diagram which shows one process of the treatment using the bendable catheter in embodiment of this invention. It is a schematic diagram which shows one process of the treatment using the bendable catheter in embodiment of this invention. It is a figure which shows the other example of the endoscope apparatus in embodiment of this invention. It is sectional drawing which expands and shows a part of endoscope apparatus shown to FIG. 16A. It is a schematic diagram which shows one process of the treatment using the bendable catheter and endoscope apparatus in embodiment of this invention. It is a schematic diagram which shows the front-end
- FIG. 1 It is a figure which shows the state which attached the curved catheter to the endoscope apparatus in embodiment of this invention. It is a schematic diagram which shows one process of the treatment using the bendable catheter in embodiment of this invention. It is a schematic diagram which shows one process of the treatment using the bendable catheter in embodiment of this invention. It is a schematic diagram which shows one process of inserting the front-end
- FIG. 33 is a schematic diagram showing another process of the treatment shown in FIG. 32.
- FIG. 33 is a schematic diagram showing another process of the treatment shown in FIG. 32.
- FIG. 33 is a schematic diagram showing another process of the treatment shown in FIG. 32.
- FIG. 33 is a schematic diagram showing another process of the treatment shown in FIG. 32.
- FIG. 33 is a schematic diagram which shows one process of the treatment using the bendable catheter in embodiment of this invention.
- FIG. 33 which shows one process of the treatment using the bendable catheter in embodiment of this invention.
- FIG. 43 is a cross-sectional view of the bendable portion of the bendable catheter shown in FIG. 41 as viewed in section along the line EE in FIG.
- FIG. 44 is a cross-sectional view taken along line FF in FIG. 43.
- FIG. 1 is a view showing a bendable catheter 1.
- the bendable catheter 1 is a flexible tubular multi-lumen tube 2 (main body tube) having a distal end 2 a and a proximal end 2 b, and a bendable operation provided on the distal end side of the multi-lumen tube 2.
- the bending part 3 and the operation part 4 fixed to the base end of the multi-lumen tube 2 are provided.
- the side where the bending portion 3 is provided in the bending catheter 1 will be described as the distal end side in the bending catheter 1
- the side where the operation portion 4 is provided will be described as the proximal end side in the bending catheter 1.
- FIG. 2 is a cross-sectional view taken along line AA in FIG.
- the outer peripheral shape of the multi-lumen tube 2 is It is substantially circular and has a shape in which two opposing portions protrude outward.
- a first lumen 2c and a second lumen 2d opened at the distal end and the base end of the multi-lumen tube 2 are formed.
- the first lumen 2c is a through-hole formed in the multi-lumen tube 2 such that the contour shape when viewed in the radial cross section of the multi-lumen tube 2 is a circle centering on the central axis O of the multi-lumen tube 2. is there.
- the internal space of the first lumen 2c is used for passing a medical treatment instrument, a medical guide wire for guiding the medical treatment instrument in the body, air supply, water supply, or suction. .
- the internal space of the first lumen 2c is formed so that the distal end and the proximal end of the multi-lumen tube 2 communicate with each other.
- the second lumen 2d is a through-hole formed one by one at two locations facing each other across the first lumen 2c in the radial cross section of the multi-lumen tube 2.
- Each of the second lumens 2d extends in parallel with each other along a portion of the multi-lumen tube 2 that protrudes outward.
- Each second lumen 2d is provided adjacent to the first lumen 2c, spaced apart from the first lumen 2c in the radial direction.
- the contour shape of each second lumen 2d is circular. The diameters of the second lumens 2d are equal to each other.
- each second lumen 2d The internal space of each second lumen 2d is formed so that the distal end 2a and the proximal end 2b of the multi-lumen tube 2 communicate with each other.
- a bending operation wire 8 to be described later is inserted into the internal space of each second lumen 2d so as to be able to advance and retreat.
- a marking M made of a material reflected in an X-ray fluoroscopic image is provided on the outer peripheral surface of the multi-lumen tube 2 on the tip 2a side.
- the marking M is a member for allowing the operator to grasp the insertion amount of the bendable catheter 1 inserted into the gap or lumen of the living tissue in the body with reference to the X-ray fluoroscopic image.
- the material of the multi-lumen tube 2 a flexible resin material can be appropriately employed.
- the multi-lumen tube 2 is easy to bend at the tip side.
- PEFE or polyethylene can be used as the material for the multi-lumen tube 2.
- the multi-lumen tube 2 has light transmittance. Thereby, from the outside of the multi-lumen tube 2, a medical treatment instrument inserted in the first lumen 2c, a medical guide wire, and the like can be visually recognized.
- the bending portion 3 is a cross-sectional view taken along line BB in FIG.
- the bending portion 3 includes a bending tube 5, a first coil 6, and a second coil 7.
- the curved tube 5 is a tubular member that is more flexible than the multi-lumen tube 2.
- the curved tube 5 has a tubular shape with both ends opened, and one end (base end) thereof is fixed to the distal end of the multi-lumen tube 2 by heat welding.
- the curved tube 5 and the multi-lumen tube 2 are arranged coaxially, and the first lumen 2 c and the second lumen 2 d of the multi-lumen tube 2 are both in communication with the lumen of the curved tube 5.
- the distal end side of the bending tube 5 is formed in a tapered shape whose diameter gradually decreases toward the distal end of the bending tube 5.
- the bending tube 5 is formed of a material more flexible than the multi-lumen tube 2, or the thickness of the bending tube 5 is changed to the thickness of the multi-lumen tube 2. Or thinner than that.
- the bending tube 5 has elasticity in the direction of the central axis of the bending tube 5 (the central axis coaxial with the central axis O of the multi-lumen tube 2). When the bending tube 5 is bent, the inner side (the inner side of the bending) contracts and the outer side (the outer side of the bending) expands.
- the curved tube 5 has optical transparency.
- a medical treatment instrument, a medical guide wire, and the like drawn out to the distal end side through the first lumen 2 c can be visually recognized from the outside of the bending tube 5.
- a material of the bending tube 5 a material having biocompatibility can be appropriately adopted.
- a resin material such as rubber, silicone, thermoplastic elastomer, or fluororesin can be used as the material of the bending tube 5.
- the bending tube 5 is a member that bends by performing a bending operation on the bending portion 3 using the operation portion 4 shown in FIG. For this reason, the length of the bending tube 5 is set to an appropriate length according to the content of the treatment using the bending catheter 1. For example, when performing a procedure of inserting the bending portion 3 of the bending catheter 1 into the bile duct from the duodenal papilla, the bending tube 5 is bent in the lumen from the duodenal papilla to the bile duct. It is set to a length that allows it.
- the length of the bending tube 5 in the central axis direction is preferably 12 mm or less. If the length of the bending tube 5 in the central axis direction is 12 mm or less, the bending tube 5 can be bent by 90 ° or more without damaging the inner wall surface of the common tube if it is a normal human body.
- the distal end side of the bending tube 5 can be made more flexible than the proximal end side, or the proximal end side of the bending tube 5 can be made more flexible than the distal end side. In these cases, the relatively flexible portion of the bending tube 5 is more likely to be bent, and the shape of the bending portion 3 when the bending portion 3 is bent is made a shape suitable for the content of the treatment. be able to.
- FIG. 4 is an enlarged cross-sectional view of the portion indicated by reference numeral X1 in FIG.
- the first coil 6 is a cylindrical coil in which the tip 6 a is disposed in the internal space of the bending tube 5, and is formed by winding a metal wire in a spiral shape.
- the first coil 6 is a loosely wound coil in which the metal wires are not in close contact with each other. That is, the winding pitch of the first coil 6 is larger than the diameter of the metal wire of the first coil 6. In an unloaded state where no external force is applied to the first coil 6, there is a gap between the metal wires of the first coil 6.
- the outer diameter of the first coil 6 is slightly larger than the inner diameter of the first lumen 2c of the multi-lumen tube 2, and the inner diameter of the first coil 6 is substantially equal to the inner diameter of the first lumen 2c.
- the base end 6b of the first coil 6 is inserted into the first lumen 2c of the multi-lumen tube 2, and is fixed to the inner peripheral surface of the first lumen 2c by heat welding. Thereby, the base end of the first coil 6 is connected to the first lumen 2c.
- the internal space of the first coil 6 communicates with the interior of the first lumen 2c, and the above-described medical treatment tool and guide wire can be inserted so as to advance and retract.
- FIG. 5A and 5B are cross-sectional views showing a part of FIG. 3 in an enlarged manner
- FIG. 5A shows a part indicated by reference numeral X2 in FIG. 3
- FIG. 5B shows a part indicated by reference numeral X3 in FIG. Yes.
- the second coil 7 is a cylindrical coil that is provided one at two locations inside the bending tube 5 with the first coil 6 interposed therebetween, and is a metal wire. Is spirally wound.
- each second coil 7 is provided adjacent to the first coil 6, and the central axis of each second coil 7 extends parallel to the central axis of the first coil 6. .
- FIG. 6 is a cross-sectional view taken along the line CC of FIG.
- the outer peripheral portion of each second coil 7 and the outer peripheral portion of the first coil 6 are in contact with each other.
- a part of the outer periphery of each second coil 7 is fixed to the inner surface of the bending tube 5 by thermal welding. Thereby, a part of the metal wire of each second coil 7 is buried in the bending tube 5 to such a depth that the inner peripheral surface of the bending tube 5 does not protrude inward from the inner peripheral portion of each second coil 7. is doing.
- each second coil 7 The other part of the metal wire of each second coil 7 is exposed in the internal space of the bending tube 5.
- the inner diameter of each second coil 7 is set to be larger than the diameter of the bending operation wire 8 so that the bending operation wire 8 to be described later can be inserted and retracted.
- each second coil 7 is disposed adjacent to the tip 6 a of the first coil 6.
- the base end 7b of each second coil 7 is located in front (tip side) of the opening on the distal end side of the first lumen 2c and the opening on the distal end side of the second lumen 2d. That is, the first coil 6 is longer than the second coil 7, and the heat-welded portion between the first coil 6 and the multi-lumen tube 2 is provided on the proximal end side with respect to the second coil 7. Since both the first coil 6 and the second coil 7 are formed of a metal wire, they appear in an X-ray fluoroscopic image. Thereby, for example, when the bending portion 3 is inserted into the body, the bending state of the bending portion 3 can be grasped by the X-ray fluoroscopic image.
- the bending operation wire 8 is a flexible wire having a distal end 8a and a proximal end 8b. Two bending operation wires 8 are provided, and the tip 8a of each bending operation wire 8 is fixed to the metal wire of the tip 7a of each second coil 7 (or the metal wire of each second coil 7 in the vicinity of the tip 7a). ing. As a method for fixing the tip 8a of each bending operation wire 8 and the tip 7a of each second coil 7, brazing, soldering, welding, or the like can be employed.
- each bending operation wire 8 is fixed to a handle portion 10 described later in the operation portion 4.
- the bending operation wire 8 is bent even when the bending portion 3 is bent to the maximum bendable range when the bending operation wire 8 is further pulled from the proximal end 2b of the multi-lumen tube 2 to the operator's hand side.
- a material of such a bending operation wire 8 a metal material such as stainless steel or titanium or an alloy material thereof, a fiber material containing carbon fiber, or the like can be adopted.
- the operation unit 4 is arranged at the hand of the operator who operates the bendable catheter 1.
- the operation unit 4 includes a main body unit 9 and a port unit 13.
- the main body 9 is a substantially rod-shaped member having a distal end 9 a fixed to the proximal end 2 b of the multi-lumen tube 2, and has a handle portion 10 and a proximal end ring 12.
- the handle portion 10 includes a first handle 10 a and a second handle 10 b provided so as to be linearly movable with respect to the main body portion 9 (movable in the axial direction of the main body portion 9).
- the first handle 10 a and the second handle 10 b are disposed to face each other with the main body 9 interposed therebetween, and each of them can move linearly with respect to the main body 9.
- the proximal ends 8b of the bending operation wires 8 are fixed to the first handle 10a and the second handle 10b, respectively.
- the first handle 10a and the second handle 10b are formed with finger hook portions 11 on which the operator's fingers are placed.
- the finger hook portion 11 is formed so as to protrude outward in the radial direction of the main body portion 9.
- the operator can pull the bending operation wire 8 fixed to the first handle 10a and the second handle 10b to the base end side by putting the finger on the finger hook portion 11 and pulling it toward the base end side.
- the base end ring 12 is provided at the base end 9 b of the main body 9, and is formed in a cylindrical shape or an annular shape whose central axis extends in a direction orthogonal to the longitudinal axis of the main body 9.
- the cylindrical or annular portion of the proximal ring 12 is formed with an inner diameter that allows a user to insert a finger.
- the port portion 13 has an opening 13a that communicates with the first lumen 2c (see FIG. 3) and opens to the outside.
- the port portion 13 is an instrument for inserting a medical treatment instrument, a medical guide wire, and the like into the first lumen 2c through the opening 13a.
- an air / water pump or a suction pump can be connected to the opening 13 a of the port portion 13, and air supply, water supply, or suction can be performed through the port portion 13.
- the port 13 in addition to the opening 13a, the port 13 is provided with a second opening 13b formed in communication with the first lumen 2c for injecting a chemical solution or a contrast medium. .
- medical solution and a contrast agent can be discharged from the front-end
- FIG. 7 is a diagram illustrating an example of an endoscope apparatus 100 used for treatment together with the bendable catheter 1.
- FIG. 8A is a view showing an example of the first treatment tool 200 used for the treatment together with the bendable catheter 1
- FIG. 8B is a view showing an example of the second treatment tool 300 used for the treatment together with the bendable catheter 1.
- the bendable catheter 1 of the present embodiment, the endoscope apparatus 100 (see FIG. 7) including the imaging unit 130, and the medical treatment tool (first treatment tool 200, see FIG. 8A) inserted into the bendable catheter 1 are included.
- An example will be described in which a combination is used to treat a lesion occurring in the luminal tissue of a human body. The operation and effect of the bendable catheter 1 will be described using this example.
- the endoscope apparatus 100 used in this usage example is provided at an endoscope main body 110, an insertion portion 120 provided extending from the endoscope main body 110, and a distal end of the insertion portion 120. And an imaging unit 130 that captures an image in front of the insertion direction.
- the insertion section 120 is provided with a plurality of treatment instrument channels 140 through which the bendable catheter 1 and other treatment instruments can be inserted and the bendable catheter 1 and other treatment instruments can be fed out from the distal end of the insertion section 120.
- the endoscope apparatus 100 that can be used in this use example is configured such that the inner diameter of at least one of the plurality of treatment instrument channels 140 is larger than the maximum outer diameter of the bending portion 3 of the bending catheter 1 and the multi-lumen tube 2. It only has to be done.
- the first treatment instrument 200 used by being inserted into the bendable catheter 1 in this use example is the inside of the port portion 13 (see FIG. 1), the first lumen 2c, and the first coil 6 (FIG. 3).
- the insertion portion 210 having an outer diameter that can be inserted into the interior of the insertion portion 210, a pair of forceps 220 provided at the distal end of the insertion portion 210 and capable of opening and closing, and a pair of forceps provided at the proximal end of the insertion portion 210.
- an operation unit 230 that opens and closes.
- an endoscopic high-frequency incision instrument (second treatment instrument 300, see FIG. 8B) having a needle-like electrode 310 for incising a living tissue is endoscopically viewed. Used in combination with the mirror device 100.
- FIG. 9 is a schematic diagram showing one process of treatment using the bendable catheter 1.
- the insertion portion 120 of the endoscope apparatus 100 is inserted into the body through a natural opening such as a patient's mouth or anus, and as shown in FIG. 9, the distal end of the insertion portion 120 is moved to a lesion D1 that requires treatment. To guide you. When the distal end of the insertion unit 120 reaches the lesioned part D1, the lesioned part D1 is observed using the imaging unit 130 provided at the distal end of the insertion part 120, and the lesioned part D1 is diagnosed.
- FIGS. 10A and 10B are schematic views showing an example in which the first treatment tool 200 is attached to the bendable catheter 1.
- the first treatment tool 200 is inserted into the port part 13 of the bendable catheter 1, The first treatment tool 200 is attached to the bendable catheter 1 such that the pair of forceps 220 protrudes from the distal end of the bendable portion 3.
- FIG. 11 and FIG. 12A are schematic views showing one process of treatment using the bendable catheter 1.
- FIG. 12B is a schematic diagram showing an endoscopic image when treatment is performed using the bendable catheter 1.
- the operator inserts the bendable catheter 1 to which the first treatment tool 200 is attached into the treatment tool channel 140 of the endoscope apparatus 100, and sets the distal end portion of the bendable catheter 1 to the endoscope. It protrudes from the tip of the insertion part 120 of the device 100.
- the first handle 10 a or the second handle 10 b of the operation unit 4 of the bendable catheter 1 is pulled to the proximal end side.
- the bending operation wire 8 fixed to the first handle 10 a moves to the proximal end side, and one of the second coils 7 fixed to the distal end of the bending operation wire 8. (See FIG. 3) is compressed in the direction of the central axis. Since the metal wire of the second coil 7 is fixed to the inner surface of the bending tube 5, when the second coil 7 contracts, the portion of the bending tube 5 fixed to the second coil 7 contracts in the central axis direction. Note that a force for compressing the multi-lumen tube 2 in the direction of the central axis is applied by pulling the bending operation wire 8.
- the bending tube 5 is more flexible than the multi-lumen tube 2, only the portion of the bending tube 5 fixed to the second coil 7 can be contracted while maintaining the shape of the multi-lumen tube 2.
- the bending tube 5 is bent toward the contracting second coil 7 of the two second coils 7.
- the first coil 6 disposed in the bending tube 5 is also bent together with the bending tube 5.
- the first coil 6 supports the inner surface of the bending tube 5 so that the shape of the bending tube 5 when viewed in a cross section perpendicular to the central axis of the bending tube 5 is circular.
- the bending portion 3 is bent, the bending tube 5 is not crushed, and the lumen of the bending tube 5 can be prevented from being blocked. Even when the bending tube 5 is bent, the medical treatment tool can be inserted.
- the part (for example, the insertion part 210 of the first treatment instrument 200) can be advanced and retracted and rotated. Further, since the lumen of the bending tube 5 can be prevented from being blocked, the bending portion 3 can be largely bent as compared with the conventional catheter.
- the insertion portion 120 of the endoscope apparatus 100 is directed toward the central axis direction of the luminal tissue
- the pair of forceps 220 of the first treatment tool 200 can be directed to the inner wall of the luminal tissue. That is, the pair of forceps 220 can be directed in a direction orthogonal to the central axis direction of the luminal tissue, and the pair of forceps 220 can be directed perpendicular to the inner wall of the luminal tissue.
- the operator operates the operation unit 230 (see FIG.
- the lesioned part D1 can be moved in the visual field of the imaging part 130 of the endoscope apparatus 100.
- FIG. 12B the lesioned part D1 can be moved to a position where it is easy to treat the lesioned part D1.
- the above-described high-frequency incision instrument (second treatment instrument 300) is inserted into the treatment instrument channel 140 (see FIG. 7) of the endoscope apparatus 100, and an endoscopic image is observed as shown in FIG. 12B.
- the lesioned part D1 is excised using the needle-like electrode 310 of the second treatment tool 300. Thereafter, the excised lesioned part D1 is grasped by the pair of forceps 220 and taken out of the body through the treatment instrument channel 140.
- the insertion portion of the endoscope device is curved in the lumen tissue so that the lesion is captured in the field of view of the imaging unit.
- an appropriate endoscopic device treatment instrument was inserted into the treatment instrument channel. Since it is difficult to bend the insertion part of the endoscopic device greatly, if there is no space for bending the insertion part of the endoscopic device in the lumen tissue, the lesioned part is appropriately positioned within the field of view of the imaging unit. It is difficult to grasp in a proper position.
- the insertion portion 210 of the first treatment instrument 200 can be bent by bending the bending portion 3 of the bending catheter 1.
- the biological tissue in the vicinity of the lesioned part D1 can be grasped by the pair of forceps 220 of the first treatment tool 200 even when the insertion part 120 of the endoscope apparatus 100 is kept parallel to the longitudinal axis direction of the luminal tissue.
- the bendable catheter 1 by pulling the bendable catheter 1 to the proximal end side, the lesioned part D1 can be moved to an appropriate position within the field of view of the imaging unit 130.
- the bendable catheter 1 the operation for treating the lesioned part D1 can be simplified, and the treatment for the lesioned part D1 can be made easier than before.
- FIG. 13A is a diagram showing an example of a third treatment tool 400 used for treatment together with the bendable catheter 1.
- FIG. 13B is a cross-sectional view showing a part of the third treatment instrument 400 in an enlarged manner.
- the third treatment tool 400 endoscopic injection needle
- the third treatment tool 400 has a cylindrical insertion portion 410 that can be inserted into the bendable catheter 1 so as to be able to advance and retreat, and a distal end of the insertion portion 410.
- the injection needle 420 is provided and has a lumen communicated with the lumen of the insertion portion 410, and a drug solution injection port 430 provided at the proximal end of the insertion portion 410.
- FIG. 14 and FIG. 15 are schematic views showing one process of treatment using the bendable catheter 1.
- the lesioned part D2 is located on the outer surface of the luminal tissue, not on the surface of the inner wall of the luminal tissue.
- the insertion unit 120 of the endoscope apparatus 100 is inserted into the body, and the distal end of the insertion unit 120 is guided to the vicinity of the lesioned part D2.
- the third treatment tool 400 is inserted into the bendable catheter 1, and the third so that the injection needle 420 can be extended from the distal end of the bendable portion 3.
- the treatment tool 400 is attached to the bendable catheter 1. Further, the bendable catheter 1 is inserted together with the third treatment tool 400 into the treatment tool channel 140 of the endoscope apparatus 100, and the distal end portion of the bendable catheter 1 is protruded from the distal end of the insertion portion 120 of the endoscope apparatus 100.
- the operator can visually recognize the marking M, the first coil 6, and the second coil 7 using the X-ray image, and confirms that the bending portion 3 is bent toward the lesioned portion D2. Can do.
- the position of the distal end of the bending portion 3 and the lesioned portion D2 is aligned using an ultrasonic endoscope that generates an image of the lesioned portion D2 by irradiating ultrasonic waves from the inside of the luminal tissue toward the lesioned portion D2. May be performed.
- the operator pulls out the injection needle 420 from the bending part 3 and punctures the luminal tissue, so that the distal end of the injection needle 420 reaches the lesioned part D2.
- the medical solution is sent from the chemical solution injection port 430 (see FIG. 13A) at the proximal end of the insertion portion 410 to the distal end, and the treatment is performed by injecting the chemical solution into the lesion D2.
- the direction of the bending portion 3 is changed even when there is not enough space in the luminal tissue to change the direction of the insertion portion 120 of the endoscope apparatus 100. Since the direction of the injection needle 420 used together with the endoscope apparatus 100 can be changed, it is possible to reliably perform the treatment on the lesion D2. Further, since the injection needle 420 can be inserted at a larger angle with respect to the inner wall surface of the luminal tissue (an angle closer to the inner wall surface), a lesion located at a deeper position using the injection needle 420 A chemical can be injected into the part D2.
- a treatment for the lesioned part D2 can be similarly performed.
- the lesioned part D2 can be thermally coagulated by puncturing the probe in the lesioned part D2.
- it can replace with inject
- the position of the marker placed in the lesioned part D2 can be specified using the X-ray fluoroscopic apparatus.
- the lesioned part D2 can be treated by irradiating the lesioned part D2 with high accuracy.
- FIG. 16A is a diagram showing an endoscope apparatus 500 of this use example used for treatment together with the bendable catheter 1.
- FIG. 16B is an enlarged cross-sectional view of the distal end portion of the endoscope apparatus 500 shown in FIG.
- an endoscope apparatus 500 used in this use example includes an endoscope main body 110, an insertion unit 120, and an imaging unit 530 provided at the distal end of the insertion unit 120. Yes.
- the endoscope apparatus 500 is a side view type unlike the endoscope apparatus 100 described in each of the use examples described above.
- an elevator 550 is provided at the distal end of the insertion portion 120 of the endoscope apparatus 500 for projecting the distal end of the bendable catheter 1 or other treatment tool to the side.
- the endoscope apparatus 500 used in this use example is provided with a treatment instrument channel 540 for inserting a treatment instrument or the like in the insertion portion 120. In the case of the treatment described in this use example, at least one treatment instrument channel 540 is sufficient.
- FIG. 17 is a schematic diagram showing one process of treatment using the endoscope apparatus 500 and the bendable catheter 1.
- the operator inserts the endoscope apparatus 500 into the body through the natural opening of the patient, and guides the distal end of the insertion portion 120 of the endoscope apparatus 500 to the duodenal papilla Dp as shown in FIG. Further, the operator captures the duodenal papilla Dp in the field of view of the imaging unit 530 of the endoscope apparatus 500.
- FIG. 18A is a schematic diagram showing a distal end portion of the bendable catheter 1 when performing a treatment
- FIG. 18B is a view showing a state where the bendable catheter 1 is attached to the endoscope apparatus 500.
- the operator inserts the bendable catheter 1 into the treatment instrument channel 540 of the endoscope apparatus 500 and feeds it from the distal end side of the bendable catheter 1 toward the raising base 550. If necessary, the bendable catheter 1 can be inserted into the treatment instrument channel 540 after bending a part of the multi-lumen tube 2 on the distal end 2a side.
- the multi-lumen tube 2 When the multi-lumen tube 2 is bent and bent, the multi-lumen tube 2 extends along the raising base 550, and therefore the rotation direction of the bendable catheter 1 relative to the endoscope device 500 (around the central axis of the bendable catheter 1). (Direction) positioning becomes easy.
- the position of the endoscope apparatus 500 in the duodenum D is determined by a predetermined technique.
- the relative position between the bile duct Bd and the endoscope apparatus 500 is generally determined in a predetermined positional relationship, by bending the multi-lumen tube 2 in advance, the bending direction of the bending portion 3 can be set so that the bile duct is inserted. It can be easily adjusted to the direction suitable for the procedure.
- FIG. 19 and FIG. 20 are schematic diagrams showing one process of treatment using the bendable catheter 1.
- the bending portion 3 at the distal end of the bending catheter 1 is protruded from the insertion portion 120 of the endoscope apparatus 500, and the bending portion 3 passes from the opening of the duodenal papilla Dp to the common tube Cc that is a luminal tissue. Insert.
- the operator pulls the first handle 10a or the second handle 10b (see FIG. 1) toward the base end side.
- the one bending operation wire 8 moves to the base end side, whereby the bending portion 3 is bent.
- FIG. 1 the bending portion 3 at the distal end of the bending catheter 1 is protruded from the insertion portion 120 of the endoscope apparatus 500, and the bending portion 3 passes from the opening of the duodenal papilla Dp to the common tube Cc that is a luminal tissue. Insert.
- the operator pulls the first handle 10a or the second handle 10b (see FIG. 1) toward the base
- the bending portion 3 includes a surface including both the central axis O2 at the distal end of the bending portion 3 and the central axis O3 at the proximal end of the bending portion 3 (that is, a surface including both the pair of bending operation wires 8 in the bending portion 3). Bend along. The direction of this bending operation of the bending portion 3 coincides with a plane including both the central axis O4 of the common tube Cc and the central axis O5 of the bile duct Bd.
- the bending portion 3 has two positions (for example, positions indicated by reference numerals P1 and P2 in FIG. 20) that are perpendicular to the inner wall surface of the common pipe Cc in a plane including both the central axes O2 and O3. ).
- the bending portion 3 is supported by the inner wall of the common tube Cc, and blurring when the multi-lumen tube 2 is pushed into the common tube Cc is suppressed, but the inner wall surface of the common tube Cc is recessed along the bending portion 3. There is little damage to the pipe wall of the common pipe Cc.
- FIG. 21A, FIG. 21B, and FIG. 21C are schematic views respectively showing one process of inserting the distal end of the bendable catheter 1 into the lumen tissue.
- the common tube Cc from the duodenal papilla Dp to the branch may be bent in a crank shape.
- the shape of the common tube Cc is confirmed by X-ray contrast, and the first handle 10a or the second handle 10b of the operation unit 4 shown in FIG.
- the bending portion 3 is bent along the shape of the common tube Cc toward the back of the common tube Cc while bending the bending portion 3 with an appropriate amount of bending according to the shape of the common tube Cc. Can be pushed in.
- 22 and 23 are schematic views showing a process of treatment using the bendable catheter 1.
- the operator pushes the multi-lumen tube 2 further into the common tube Cc while the bending portion 3 is curved in the common tube Cc. Then, the distal end of the bending portion 3 is slid and moved to the back of the common tube Cc while contacting the inner wall of the common tube Cc.
- the common tube Cc is divided into a bile duct Bd and a pancreatic duct Pd at the back of the common tube Cc. As shown in FIG.
- the bending portion 3 when the distal end of the bending portion 3 reaches the branch portion, the bending portion 3 is bent at a steep angle toward the bile duct Bd and the distal end of the bending portion 3 faces the bile duct Bd. 3 is easily inserted into the bile duct Bd.
- the tip of the curved portion 3 is formed in a taper shape, even when there is a crease so as to close the opening of the bile duct Bd in the branch portion at the back of the common tube Cc, the bile duct Bd The tip of the bending portion 3 can be inserted into the lumen.
- the bending portion 3 is selectively inserted into the bile duct Bd by pushing the multi-lumen tube 2 from the duodenal papilla Dp to the back of the common tube Cc while the bending portion 3 is bent.
- the operator performs a predetermined treatment on the bile duct Bd with the bending portion 3 inserted into the bile duct Bd.
- the bile duct Bd can be imaged by injecting a contrast medium from the port section 13 provided in the operation section 4 shown in FIG. 1 and discharging the contrast medium from the distal end of the bending section 3.
- FIG. 24 is a diagram illustrating a process of inserting the guide wire GW into the bendable catheter 1.
- 25 to 27 are schematic views showing one process of the procedure using the bendable catheter 1 and the guide wire GW.
- the operator can insert the guide wire GW into the bendable catheter 1 by inserting a flexible guide wire GW from the opening 13 a of the port portion 13.
- the operator extends the guide wire GW from the tip of the bending portion 3 and inserts the guide wire GW along the bile duct Bd. For example, as shown in FIG.
- the fourth treatment tool 600 is guided along the guide wire GW, and a predetermined treatment is performed on the foreign matter D3. For example, when removing a calculus that is a foreign substance in the bile duct, as the fourth treatment tool 600, an endoscope treatment tool including a lithotrip basket for crushing the calculus can be used.
- the bendable catheter 1 of this use example is provided with the first coil 6 inside the bendable portion 3, so that it is not easily crushed even if the bendable portion 3 is bent with a large curvature.
- the minimum bending radius of the bending portion 3 can be further reduced.
- the bending tube 5 can be prevented from being crushed, and the bending portion 3 can be made thinner.
- the minimum bending radius of the bending portion 3 can be reduced, the procedure for adjusting the direction of the distal end of the catheter to the direction of the bile duct Bd is simpler than in the case where bile duct insertion is performed using a conventional catheter.
- insertion into the bile duct Bd can be performed more easily than in the past.
- FIG. 28 is a view showing an example of a fifth treatment instrument 700 used with the bendable catheter 1. As shown in FIG. 28, in this usage example, a high-frequency knife is used as the fifth treatment instrument 700 inserted into the bendable catheter 1.
- the fifth treatment instrument 700 is formed with an insertion portion 710 inserted into the treatment instrument channel 540 of the endoscope apparatus 500, and a through hole is formed in the living tissue by being provided with a high-frequency current at the distal end of the insertion portion 710. It has a needle-like incision part 720 and an operation part 730 provided at the proximal end of the insertion part 710.
- FIG. 29 to FIG. 31 are schematic views showing one process of treatment using the bendable catheter 1.
- FIG. 29 an example of treatment for forming a fistula connecting the bile duct Bd and the duodenum D between the bile duct Bd and the duodenum D is shown.
- the operator inserts the endoscope apparatus 500 into the body cavity from the natural opening of the patient, and guides the distal end of the insertion portion 120 of the endoscope apparatus 500 to the vicinity of the duodenal papilla Dp. Further, the inner wall surface of the duodenum D is observed, and an appropriate scheduled position for determining a fistula is determined.
- the operator captures the duodenal papilla Dp in the field of view of the imaging unit 530 of the endoscope apparatus 500, and places the distal end of the bendable catheter 1 in the bile duct Bd as in the above-described Usage Example 3. Insert into.
- the position of the bendable catheter 1 located in the bile duct Bd can be grasped by using the marking M, the first coil 6 and the second coil 7 as a guide by performing X-ray contrast.
- the operator pushes the distal end of the bending catheter 1 to the vicinity of the predetermined position determined by observing from the duodenum D side, and bends the bending portion 3 so that the distal end of the bending catheter 1 faces the duodenum D side at the predetermined position.
- the bendable catheter 1 is disposed along the central axis of the bile duct Bd, and the operator bends the bendable portion 3 by approximately 90 ° in order to point the distal end of the bendable catheter 1 toward the duodenum D side.
- the operator inserts the fifth treatment instrument 700 from the port portion 13 of the bendable catheter 1 into the bendable catheter 1 and inserts the fifth treatment instrument 700 from the distal end of the bendable section 3 of the bendable catheter 1.
- the incision 720 is protruded. Then, the incision 720 comes into contact with the inner wall of the bile duct Bd.
- the operator applies a high-frequency current to the fifth treatment instrument 700 that is a high-frequency knife.
- the living tissue in contact with the incision 720 to which the high-frequency current is applied is cauterized and an incision 720 forms a through hole from the bile duct Bd to the duodenum D side.
- a drainage tube or the like is attached to the through hole, and a fistula for communicating the bile duct Bd and the duodenum D is formed.
- the incision is compared with the case where the through-hole is formed from the duodenum D side to the bile duct Bd. It is possible to prevent an unintended through hole from being formed in the bile duct Bd by the tip of the portion 720.
- the incision portion is compared with the case where the through hole is formed from the duodenum D side toward the bile duct Bd. The duodenum D and the bile duct Bd can be reliably connected without strictly adjusting the direction of the tip of the 720. Note that the same procedure can be used for the treatment of communicating parallel blood vessels.
- FIG. 32 is a schematic diagram showing a process of performing a treatment using the bendable catheter 1 in a surgery using a laparoscope.
- a small incision is made in the abdominal wall W to form a through hole, and through the through hole, for example, the above-described endoscope devices 100 and 500 and various treatment tools are inserted into a body cavity. Insert into.
- a through hole H1 for inserting the insertion portion 120 (see FIG. 7) of the endoscope apparatus 100 or the like is formed in the abdominal wall W, and a trocar is attached.
- the operator introduces various treatment tools into the abdominal cavity through the through-hole H1, and performs treatment within the abdominal cavity.
- the blood accumulates in the abdominal cavity.
- a part of blood may enter a gap between living tissues.
- FIG. 32 blood B1 is accumulated between two biological tissues T1 and T2.
- it is possible to make the lesion site easier to see or treat by sucking the blood that has entered the gap between the living tissues T1 and T2 and washing the living tissues T1 and T2. Further, by washing the living tissues T1 and T2, adhesion between organs in the abdominal cavity can be prevented.
- the bendable catheter 1 is prepared with a suction pump attached to the port portion 13 formed in the operation portion 4 of the bendable catheter 1 shown in FIG.
- the operator introduces the bendable catheter 1 into the body cavity through the through hole H1 formed in the abdominal wall W.
- the position of the bendable catheter 1 in the body cavity can be grasped using an endoscope apparatus or the like introduced into the body cavity through another through hole.
- the operator inserts the bendable catheter 1 into the treatment instrument channel 140 of the endoscope apparatus 100 described in the first use example, and exposes the distal end of the bendable catheter 1 from the distal end of the insertion portion 120 of the endoscope apparatus 100.
- the bendable catheter 1 may be introduced into the abdominal cavity.
- FIGS. 33A and 33B are schematic views showing another process of the treatment shown in FIG. 32, respectively.
- the operator inserts the distal end of the bending portion 3 of the bending catheter 1 into the gap between the biological tissues T1 and T2.
- the operator alternately pulls the first handle 10a and the second handle 10b (see FIG. 1) of the operation unit 4 of the bendable catheter 1 to the proximal end side, The distal end of the bending catheter 1 is pushed between the living tissues T1 and T2 while bending the distal end of the bending portion 3 alternately.
- the bending portion 3 of the bending catheter 1 is pushed into the gap between the two living tissues T1 and T2 while alternately bending in two opposing directions to widen the gap between the living tissues.
- the suction pump connected to the port portion 13 is operated.
- the blood B1 is sucked from the distal end of the bending portion 3 through the inside of the bending portion 3 and the first lumen 2c (see FIG. 3) and discharged outside the body.
- the bending catheter 1 is inserted into the gap between the living tissues by alternately bending the bending portions 3 of the bending catheter 1 without separately using a retractor for moving the living tissue in the body cavity. Can do. For this reason, it is not necessary to further incise the abdominal wall W in order to insert the retractor into the body cavity, and the invasion to the patient can be suppressed.
- the procedure described in this use example can be applied not only when blood is discharged but also when exudate is discharged or when a cell sample is collected from ascites or pleural effusion.
- FIG. 6 An example in which the inside of a body cavity is observed by combining the bendable catheter 1, the endoscope apparatus 100, the fifth treatment tool 700 inserted through the bendable catheter 1 and an in-vivo observation device (not shown) will be described.
- the operation and effect of the bendable catheter 1 will be described using this example.
- the endoscope device 100 of the same type as in the above-described usage example 1 is used, a through hole is formed in the stomach wall, and the inside of the abdominal cavity is observed through this in-vivo observation device. In such a procedure, the abdominal cavity can be observed without making a small incision in the abdominal wall.
- the in-vivo observation device inserted into the bendable catheter 1 in this usage example includes an imaging unit at the tip, and the inside of the body can be observed by the imaging unit.
- FIG. 34 and FIG. 35 are schematic diagrams showing one process of treatment using the bendable catheter 1.
- the insertion part 120 of the endoscope apparatus 100 is inserted into the patient's body from the patient's mouth, and the distal end of the insertion part 120 is guided into the stomach of the patient.
- the fifth treatment instrument 700 is inserted into the bendable catheter 1 through the port portion 13, and the distal end of the bendable catheter 1 is further projected from the distal end of the treatment instrument channel 140 of the endoscope apparatus 100 (see FIG. 35).
- FIG. 36 is a schematic diagram showing a process of incising a partial layer of the stomach wall using the bendable catheter 1.
- FIG. 37A is a schematic diagram showing a process of inserting the bendable catheter 1 into a partial layer of the stomach wall.
- FIG. 37B is a schematic diagram showing a process of inserting the bendable catheter 1 between the layers of the stomach wall.
- FIG. 38 is a schematic diagram showing a process of forming a through hole in a partial layer of the stomach wall.
- FIG. 39 is a schematic diagram showing a process of observing the abdominal cavity using the bendable catheter 1 inserted through a through hole formed in the stomach wall. As shown in FIG.
- the operator uses the fifth treatment instrument 700 to incise the stomach mucosa layer m to expose the submucosa sm.
- the distal end of the bending catheter 1 is inserted between the gastric mucosa layer m and the submucosa sm, and as shown in FIG. 37B, the mucosa layer m and the submucosa sm are bent while being peeled.
- the catheter 1 is pushed between the mucosa layer m and the submucosa sm.
- FIG. 37A the distal end of the bending catheter 1 is inserted between the gastric mucosa layer m and the submucosa sm, and as shown in FIG. 37B, the mucosa layer m and the submucosa sm are bent while being peeled.
- the catheter 1 is pushed between the mucosa layer m and the submucosa sm.
- the operator moves the distal end of the bendable catheter 1 between the mucosal layer m and the submucosal layer sm to a position away from the position where the mucosal layer m is incised.
- the first handle 10a or the second handle 10b of the operation unit 4 is pulled to the proximal end side, and the bending portion 3 of the bending catheter 1 is bent.
- the bendable catheter 1 is disposed along the submucosal layer sm, and the bending portion 3 is bent 90 ° from a straight state in order to make a through-hole in the submucosal layer sm, the muscle layer pm, and the serosa ss.
- the tip of the bending portion 3 is directed toward the submucosa sm, the muscle layer pm, and the serosa ss.
- the operator presses the tip of the incision portion 720 of the fifth treatment instrument 700 against the submucosal layer sm and causes the incision portion 720 to pass a high-frequency current.
- the submucosal layer sm with which the incision 720 is in contact is cauterized and a through-hole is formed in the submucosal layer sm.
- through-holes are similarly formed in the muscle layer pm and serosa ss that overlap the submucosa sm.
- a tunnel communicating between the stomach and the abdominal cavity is formed in the stomach wall.
- the operator inserts the distal end of the bending portion 3 into a through hole formed in the submucosa sm, muscle layer pm, and serosa ss, and guides the bending portion 3 into the abdominal cavity.
- the operator pulls out the fifth treatment instrument 700 from the bendable catheter 1 and inserts the in-vivo observation device for imaging the abdominal cavity into the bendable catheter 1 to observe the abdominal cavity.
- an in-vivo observation apparatus an apparatus that acquires an optical image, an apparatus that generates an image by irradiating ultrasonic waves, or the like can be used as appropriate.
- FIG. 40 is a schematic diagram showing a state where the through-hole formed in the stomach wall is closed.
- the bendable catheter 1 is pulled back into the stomach, and then the incised portion of the mucosal layer m is sewn with the clip C1 or the like to complete the treatment.
- the through-hole formed using the bendable catheter 1 is expanded, or the bendable catheter 1 is pulled back into the stomach and the incision in the mucosal layer m is sewn with a clip or the like. After that, another through-hole is formed in the stomach wall.
- necessary treatment is performed in the abdominal cavity using the endoscope apparatus 100 and other treatment tools used for the treatment in the abdominal cavity.
- the position where the incision is made in the mucosa layer m and the position where the through-hole is formed in the submucosa sm, the muscle layer pm, and the serosa ss are different from each other in the thickness direction of the stomach wall. For this reason, it is possible to reduce the possibility of infection from the stomach to the abdominal cavity through these through-holes after the incision formed in the gastric mucosa is stitched.
- the mucosal layer m is peeled off and turned up.
- the curved catheter 1 is only inserted between the mucosal layer m and the submucosal layer sm, the area where the mucosal layer m is peeled can be reduced, which further increases the invasion to the patient. Can be reduced. It should be noted that the same procedure as in this use example can be performed when a marker is placed in the tissue in the abdominal cavity or an indwelling electrode is placed in the tissue in the abdominal cavity.
- FIG. 41 is a view showing a bendable catheter 1A of the present modification.
- 42 is a cross-sectional view taken along the line DD of FIG. 43 is a cross-sectional view of the bendable portion of the bendable catheter shown in FIG. 41 as seen along the line EE in FIG. 44 is a cross-sectional view taken along line FF in FIG.
- the bendable catheter 1A of the present modification is provided with a flexible tubular body tube 2A instead of the multi-lumen tube 2, and the configuration of the bendable portion 3 is the above-described bend.
- the main body tube 2A includes a first tube 2A1 and a second tube 2A2 into which the first tube 2A1 is inserted.
- the first tube 2A1 is a cylindrical member having a central axis OA2 coaxially with the central axis OA of the main body tube 2A.
- the internal space of the first tube 2A1 is used for inserting a medical treatment instrument and a guide wire, supplying air, supplying water, or sucking in the same manner as the first lumen 2c described in the above embodiment. .
- the outer diameter of the first tube 2A1 is smaller than the inner diameter of the second tube 2A2, and there is a gap between the first tube 2A1 and the second tube 2A2.
- the bending operation wire 8 is inserted between the first tube 2A1 and the second tube 2A2, and the space between the first tube 2A1 and the second tube 2A2 is described in the above embodiment. It is a lumen corresponding to the second lumen 2d.
- the material of the first tube 2A1 and the second tube 2A2 can be the same material as that of the multi-lumen tube 2 described above. Further, the material of the first tube 2A1 and the material of the second tube 2A2 may be the same or different from each other.
- the bending portion 3 in the present modification includes a first coil 6 ⁇ / b> A instead of the first coil 6, and includes a second coil 7 ⁇ / b> A instead of the second coil 7.
- the first coil 6 ⁇ / b> A is a cylindrical coil formed of a metal wire like the first coil 6 described above.
- the first coil 6A is a loosely wound coil, and the size of the gap between the metal wires of the first coil 6A is larger than the diameter of the metal wire of the second coil 7A described later.
- the second coil 7A is a cylindrical coil formed of a metal wire as in the first coil 6A.
- the winding pitch of the second coil 7A is equal to the winding pitch of the first coil 6A.
- the positional relationship between the second coil 7A and the first coil 6A is such that the metal wire of the second coil 7A is in the gap between the metal wires of the first coil 6A. It is in a positional relationship where a part has entered.
- the metal wire of the first coil 6A and the metal wire of the second coil 7A are the central axis of the second coil 7A. They are arranged alternately in the direction. As shown in FIG.
- each second coil 7A when viewed from the central axis direction of each second coil 7A, the outer peripheral portion of the first coil 6A and the inner peripheral portion of the second coil 7A are in contact with each other, and the inner portion of the first coil 6A The peripheral portion and the outer peripheral portion of the second coil 7A are in contact with each other.
- the second coil 7A does not protrude inward from the inner peripheral part of the first coil 6A, and the first coil 6A does not protrude inward from the inner peripheral part of the second coil 7A.
- the internal space of the first coil 6A is cylindrical, and the internal space of the second coil 7A is also cylindrical.
- the main body tube 2A is configured by combining the simple cylindrical first tube 2A1 and the second tube 2A2, so that the main body tube 2A can be easily manufactured. Furthermore, in this modification, since the positional relationship is such that a part of the metal wire of the second coil 7A enters the gap of the metal wire of the first coil 6A, the bending portion 3 is made more than the configuration described in the above embodiment. The diameter can be small.
- the outer surface of the bending operation wire 8 may be provided with a coating made of a fluororesin such as PTFE in order to reduce friction with respect to the operation unit 4, the main body tube 2A, and the second coils 7 and 7A.
- a fluororesin such as PTFE
- the tip 8a of the bending operation wire 8 may be fixed to the tip 6a of the first coil 6 in addition to the tip 7a of the second coil 7, for example, by brazing, soldering, or welding.
- the first coil 6, the second coil 7, and the bending operation wire 8 are integrally fixed in a step before attaching to the multi-lumen tube 2 or the main body tube 2 ⁇ / b> A and the bending tube 5.
- the first coil 6, the second coil 7, and the bending operation wire 8 can be easily attached to the multi-lumen tube 2 or the main body tube 2 ⁇ / b> A and the bending tube 5.
- distal end 8 a of the bending operation wire 8 may be thermally welded or bonded to the inner wall surface on the distal end side of the bending tube 5.
- the tip 8 a of the bending operation wire 8 may be fixed to the tip of the first coil 6 instead of being fixed to the second coil 7.
- curved catheter 2 multi-lumen tube (main body tube) 2A ... main body tube 2A1 ... first tube 2A2 ... second tube 2c ... first lumen 2d ... second lumen 3 ... bending portion 5 ... bending tube 6, 6A ... first coil 7, 7A ... second coil 8 ... bending operation wire
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Abstract
Description
本願は、2010年9月23日に米国に仮出願された米国出願61/385,727号に基づき優先権を主張し、その内容をここに援用する。
しかしながら、カテーテルを大きく湾曲させると、その内腔が塞がれてしまい、流体の流動や処置具の挿通が困難になる可能性がある。そのため、従来のカテーテルは、大きく湾曲させることが難しい。
カテーテルが大きく湾曲できないため、細い体腔内や途中で分岐している体腔内にカテーテルを適切に挿入することが難しい。
また、カテーテル内には、病変部を切除するための切開用処置具(高周波切開具等)が挿通される場合があるが、カテーテルが大きく湾曲できないため、切開用処置具の先端を病変部に正確に向けることが困難になる可能性がある。よって、病変部周辺の体組織の損傷を防止しつつ、病変部に対する適切な処置を行うには煩雑な操作が必要となる可能性がある。
湾曲カテーテルを大きく湾曲させられるため、細い体腔内や途中で分岐している体腔内に湾曲カテーテルを適切かつ容易に挿入することができる。
また、湾曲カテーテル内に切開用処置具が挿通されて、病変部を切除する処置が行われる場合であっても、湾曲カテーテルが大きく湾曲できるため、切開用処置具の先端を病変部に正確に向けることができる。よって、病変部周辺の体組織を損傷することを防止しつつ、簡単な操作で病変部を適切に切除できる。
本実施形態の湾曲カテーテル1は、患者の体内に挿入して使用される管状の医療器具である。
図1は、湾曲カテーテル1を示す図である。図1に示すように、湾曲カテーテル1は、先端2aと基端2bとを有する可撓管状のマルチルーメンチューブ2(本体チューブ)と、マルチルーメンチューブ2の先端側に設けられた湾曲動作可能な湾曲部3と、マルチルーメンチューブ2の基端に固定された操作部4とを備える。以下、湾曲カテーテル1において湾曲部3が設けられている側を湾曲カテーテル1における先端側、操作部4が設けられている側を湾曲カテーテル1における基端側として説明する。
湾曲チューブ5は、マルチルーメンチューブ2よりも柔軟な管状部材である。湾曲チューブ5は、両端が開口された管状であり、その一端(基端)がマルチルーメンチューブ2の先端に熱溶着によって固定されている。湾曲チューブ5とマルチルーメンチューブ2とは同軸状に配置されており、マルチルーメンチューブ2の第一ルーメン2cと第二ルーメン2dはいずれも湾曲チューブ5の内腔と連通している。湾曲チューブ5の先端側は、湾曲チューブ5の先端に向かうに従って漸次直径が小さくなるテーパー形状に形成されている。
湾曲チューブ5の材料としては、生体適合性を有する材料を適宜採用することができる。たとえば、ゴム、シリコーン、熱可塑性エラストマー、あるいはフッ素樹脂などの樹脂材料を湾曲チューブ5の材料として用いることができる。
第一コイル6と第二コイル7とはともに金属線材によって形成されているので、X線透視画像に映る。これにより、たとえば体内に湾曲部3が挿入された場合に、湾曲部3の湾曲状態をX線透視画像によって把握することができる。
湾曲操作ワイヤー8は、マルチルーメンチューブ2の基端2bから湾曲操作ワイヤー8をさらに操作者の手元側へ牽引したときに、湾曲部3が湾曲可能範囲の最大まで湾曲しても湾曲操作ワイヤー8が破断しない程度の強度を有する。このような湾曲操作ワイヤー8の材質としては、ステンレス鋼やチタンなどの金属材料あるいはこれらの合金材料や、炭素繊維を含有する繊維材料などを採用することができる。
本体部9は、マルチルーメンチューブ2の基端2bに先端9aが固定された略棒状の部材であり、ハンドル部10と、基端リング12とを有する。
ハンドル部10は、本体部9に対して直線移動可能(本体部9の軸方向に移動可能)に設けられた第一ハンドル10aおよび第二ハンドル10bを有する。第一ハンドル10aと第二ハンドル10bは、本体部9を間に挟んで対向配置されており、それぞれが本体部9に対して直線移動できる。第一ハンドル10aと第二ハンドル10bには、湾曲操作ワイヤー8の基端8bがそれぞれ固定されている。第一ハンドル10aおよび第二ハンドル10bには、操作者の指をかける指掛け部11が形成されている。指掛け部11は、本体部9の径方向外側へ向けて突出して形成されている。操作者は、指掛け部11に指を当てて基端側へ引くことによって、第一ハンドル10aおよび第二ハンドル10bに固定された湾曲操作ワイヤー8を基端側へ牽引することができる。
基端リング12は、本体部9の基端9bに設けられており、本体部9の長手軸に対して直交する方向へ中心軸が延びる筒状あるいは環状に形成されている。基端リング12の筒状あるいは環状部分は、ユーザが指を差し込むことができる内径に形成されている。
また、本実施形態では、ポート部13には、開口部13aに加えて、薬液や造影剤を注入するために第一ルーメン2cに連通して形成された第二開口部13bが設けられている。これにより、医療用処置具や医療用のガイドワイヤーを開口部13aを通じて湾曲カテーテル1に取り付けたまま、薬液や造影剤を第一ルーメン2cの隙間を通じて湾曲部3の先端から吐出させることができる。
図7は、湾曲カテーテル1とともに処置に用いられる内視鏡装置100の一例を示す図である。図8Aは湾曲カテーテル1とともに処置に用いられる第一処置具200の一例を示す図、図8Bは湾曲カテーテル1とともに処置に用いられる第二処置具300の一例を示す図である。
本実施形態の湾曲カテーテル1と、撮像部130を備える内視鏡装置100(図7参照)と、湾曲カテーテル1内に挿通する医療用処置具(第一処置具200、図8A参照)とを組み合わせて、人体の管腔組織内に生じた病変部に対して治療を行う例を説明する。この例を用いて湾曲カテーテル1の作用および効果を説明する。
また、本使用例では、第一処置具200のほかに、生体組織を切開するための針状電極310を有する内視鏡用高周波切開具(第二処置具300、図8B参照)を内視鏡装置100と組み合わせて使用する。
本使用例では、患者の口や肛門などの自然開口から内視鏡装置100の挿入部120を体内へ挿入し、図9に示すように、処置を要する病変部D1へと挿入部120の先端を案内する。
挿入部120の先端が病変部D1へ到達したら、挿入部120の先端に設けられた撮像部130を用いて病変部D1を観察し、病変部D1の診断を行う。
図11に示すように、操作者は、第一処置具200が取り付けられた湾曲カテーテル1を内視鏡装置100の処置具チャンネル140の内部に挿入し、湾曲カテーテル1の先端部分を内視鏡装置100の挿入部120の先端から突出させる。
次に、図1に矢印で示すように、湾曲カテーテル1の操作部4の第一ハンドル10aあるいは第二ハンドル10bを基端側へ引く。たとえば第一ハンドル10aを基端側へ引くと、第一ハンドル10aに固定された湾曲操作ワイヤー8が基端側へと移動し、湾曲操作ワイヤー8の先端に固定された一方の第二コイル7(図3参照)は中心軸方向へ圧縮される。第二コイル7の金属線材は湾曲チューブ5の内面に固定されているので、第二コイル7が収縮すると湾曲チューブ5のうち第二コイル7に固定された部分が中心軸方向に収縮する。なお、湾曲操作ワイヤー8の牽引により、マルチルーメンチューブ2に対しても中心軸方向に圧縮する力が加えられる。もっとも、湾曲チューブ5はマルチルーメンチューブ2よりも柔軟であるため、マルチルーメンチューブ2の形状を保持したまま、湾曲チューブ5のうち第二コイル7に固定された部分のみを収縮させることができる。これにより、図1に示すように、湾曲チューブ5は、2つの第二コイル7のうち収縮する第二コイル7の側へと湾曲する。
湾曲チューブ5が湾曲すると、湾曲チューブ5内に配置された第一コイル6も湾曲チューブ5とともに湾曲する。第一コイル6は、湾曲チューブ5の中心軸に直交する断面でみたときの湾曲チューブ5の形状が円形となるように湾曲チューブ5の内面を支持している。
これにより、湾曲部3を湾曲させても湾曲チューブ5がつぶれることがなく、湾曲チューブ5の内腔が塞がれることを防止でき、湾曲チューブ5が湾曲された状態でも医療用処置具の挿入部(例えば第一処置具200の挿入部210)を進退および回転させることができる。また、湾曲チューブ5の内腔が塞がれることを防止できるため、従来のカテーテルに比べて、湾曲部3を大きく湾曲させることができる。
図12Aに示すように、操作者は、第一処置具200の操作部230(図8A参照)を操作して一対の鉗子220を開閉動作させ、病変部D1の近傍の生体組織を把持し、湾曲カテーテル1ごと基端側へと引く。これにより、図12Bに示すように、内視鏡装置100の撮像部130の視野内に病変部D1を移動させることができる。すなわち、病変部D1に対して処置をしやすい位置まで、病変部D1を移動させることができる。
次に、内視鏡装置100の処置具チャンネル140(図7参照)に上述の高周波切開具(第二処置具300)を挿入し、図12Bに示すように、内視鏡画像を観察しながら第二処置具300の針状電極310を用いて病変部D1を切除する。その後、切除した病変部D1を一対の鉗子220で把持し、処置具チャンネル140を通じて体外へと取り出す。
これに対して、本使用例では、湾曲カテーテル1の湾曲部3を湾曲させることによって第一処置具200の挿入部210を湾曲させることができる。このため、内視鏡装置100の挿入部120を管腔組織の長手軸方向と平行にしたままでも、第一処置具200の一対の鉗子220によって病変部D1の近傍の生体組織を把持できる。また、湾曲カテーテル1を基端側へ引くことで、病変部D1を撮像部130の視野内の適切な位置へ移動させることができる。その結果、湾曲カテーテル1を使用することにより、病変部D1に対して処置を行うための動作をより単純化して、病変部D1に対する処置を従来より容易にすることができる。
本実施形態の湾曲カテーテル1と、内視鏡装置100と、湾曲カテーテル1内に挿通する第三処置具とを組み合わせて、人体の管腔組織内に生じた病変部に対して治療を行う他の例を説明する。この例を用いて湾曲カテーテル1の作用および効果を説明する。
本使用例では、管腔組織の組織内部に生じた病変部に対して治療を行う例を示す。
本使用例では、上述の使用例1と同様の内視鏡装置100と、湾曲カテーテル1の内部に挿入して用いることができる第三処置具である内視鏡用注射針とを用いる。
図13Aおよび図13Bに示すように、第三処置具400(内視鏡用注射針)は、湾曲カテーテル1の内部に進退可能に挿通できる筒状の挿入部410と、挿入部410の先端に設けられ、挿入部410の内腔と連通された内腔を有する注射針420と、挿入部410の基端に設けられた薬液注入用ポート430とを備える。
図14に示すように、本使用例の場合には、病変部D2は管腔組織の内壁の表面ではなく管腔組織の外面に位置している。本使用例では、上述の使用例1と同様に、内視鏡装置100の挿入部120を体内へ挿入し、挿入部120の先端を病変部D2の近傍へと案内する。
挿入部120の先端が病変部D2の近傍へと案内されたら、第三処置具400を湾曲カテーテル1の内部に挿入し、注射針420を湾曲部3の先端から繰り出すことができるように第三処置具400を湾曲カテーテル1に取り付ける。さらに、湾曲カテーテル1を第三処置具400ごと内視鏡装置100の処置具チャンネル140へ挿入し、内視鏡装置100の挿入部120の先端から湾曲カテーテル1の先端部分を突出させる。
湾曲部3の先端が病変部D2へ向けられた状態で、操作者は注射針420を湾曲部3から繰り出して管腔組織に穿刺し、病変部D2に注射針420の先端を到達させる。さらに、挿入部410の基端の薬液注入用ポート430(図13A参照)から薬液を先端へ送り出し、病変部D2へ薬液を注入して処置を行う。
また、管腔組織の内壁面に対してより大きな角度(内壁面に対してより垂直に近い角度)で注射針420を挿入することができるので、注射針420を用いてより深い位置にある病変部D2に対して薬液を注入することができる。
また、薬液を注入することに代えて、X線画像に映る材料によって形成されたマーカーを病変部D2に留置する処置を同様の方法で行うこともできる。これにより、たとえば病変部D2に留置されたマーカーの位置を、X線透視装置を用いて特定することができる。マーカーをターゲットとしてX線などの放射線を照射することにより、病変部D2に精度良く放射線を照射して病変部D2を治療することができる。
本実施形態の湾曲カテーテル1と、撮像部を備える内視鏡装置と、湾曲カテーテル1内に挿通するガイドワイヤーとを組み合わせて、管腔組織内に生じた異物を除去する内視鏡用処置具を案内する例を説明する。この例を用いて湾曲カテーテル1の作用および効果を説明する。
本使用例では、湾曲カテーテル1を胆管に選択的に挿入する胆管挿入の手技及びその後に引き続いて実施される処置の例を示す。図16Aは、湾曲カテーテル1とともに処置に用いられる本使用例の内視鏡装置500を示す図である。図16Bは、図16Aに示す内視鏡装置500の先端部を拡大して示す断面図である。
図16Aおよび図16Bに示すように、本使用例で用いる内視鏡装置500は、内視鏡本体110と、挿入部120と、挿入部120の先端に設けられた撮像部530とを備えている。内視鏡装置500は、上述の各使用例で説明した内視鏡装置100と異なり側視型である。内視鏡装置500の挿入部120の先端には、湾曲カテーテル1やその他の処置具の先端を側方へ突出させるための起上台550が設けられている。本使用例に用いる内視鏡装置500も上述の内視鏡装置100と同様に、挿入部120には処置具等を挿通するための処置具チャンネル540が設けられている。なお、本使用例で説明する処置の場合には、処置具チャンネル540は少なくとも一つあればよい。
図17は、内視鏡装置500および湾曲カテーテル1を用いた処置の一過程を示す模式図である。操作者は、患者の自然開口から体内に内視鏡装置500を挿入し、図17に示すように、内視鏡装置500の挿入部120の先端を十二指腸乳頭Dpまで案内する。さらに、操作者は、内視鏡装置500の撮像部530の視野に十二指腸乳頭Dpを捉える。
図18Aおよび図18Bに示すように、操作者は、湾曲カテーテル1を内視鏡装置500の処置具チャンネル540へ挿通し、起上台550へ向けて湾曲カテーテル1の先端側から送り込む。必要に応じて、マルチルーメンチューブ2の先端2a側の一部に曲がり癖を付けてから処置具チャンネル540に湾曲カテーテル1を挿入することができる。マルチルーメンチューブ2に曲がり癖がつけられている場合には、起上台550に対してマルチルーメンチューブ2が沿うので、内視鏡装置500に対する湾曲カテーテル1の回転方向(湾曲カテーテル1の中心軸周り方向)の位置決めが容易になる。本使用例では、図17に示すような十二指腸乳頭Dpに対する内視鏡的アプローチの手技において、所定の手技によって十二指腸D内における内視鏡装置500の位置が定まる。このため、胆管Bdと内視鏡装置500との相対位置は所定の位置関係に概ね定まるので、予めマルチルーメンチューブ2に曲がり癖を付けておくことで、湾曲部3の湾曲方向を胆管挿入の手技に適した向きに容易に合わせることができる。
続いて、操作者は第一ハンドル10aあるいは第二ハンドル10b(図1参照)を基端側へ引く。すると、一方の湾曲操作ワイヤー8が基端側へ移動することによって湾曲部3が湾曲する。すると、図20に示すように湾曲部3の先端が共通管Ccの管壁に略垂直に接触する。湾曲部3は、湾曲部3の先端の中心軸O2と湾曲部3の基端の中心軸O3とが共に含まれる面(すなわち、湾曲部3における一対の湾曲操作ワイヤー8が共に含まれる面)に沿って湾曲動作する。湾曲部3のこの湾曲動作の方向が、共通管Ccの中心軸O4と胆管Bdの中心軸O5とが共に含まれる面と一致している。
また、このとき、湾曲部3は、中心軸O2、O3が共に含まれる面内で、共通管Ccの内壁面に垂直に対向する二ヶ所(たとえば図20において符号P1と符号P2とで示す位置)にそれぞれ接している。共通管Ccの内壁によって湾曲部3が支持され、マルチルーメンチューブ2を共通管Cc内へ押し込む際のブレが抑制されているが、共通管Ccの内壁面は湾曲部3に沿って凹むので、共通管Ccの管壁へのダメージは少ない。
共通管Ccは、共通管Ccの奥で胆管Bdと膵管Pdとに分かれている。図22に示すように、湾曲部3の先端が分岐部に到達すると、湾曲部3が胆管Bd側へ急角度に曲げられて湾曲部3の先端が胆管Bd側に向いているので、湾曲部3は胆管Bdへ容易に挿入される。なお、湾曲部3の先端がテーパー形状に形成されているので、共通管Ccの奥にある分岐部において胆管Bdの開口を塞ぐようにヒダがある場合にも、このヒダを押しのけて胆管Bdの内腔へ湾曲部3の先端を挿入することができる。
このように、湾曲部3を湾曲させた状態でマルチルーメンチューブ2を十二指腸乳頭Dpから共通管Ccの奥へと押し進めることによって、湾曲部3が胆管Bdへと選択的に挿入される。
操作者は、図23に示すように湾曲部3が胆管Bd内に挿入された状態で、胆管Bdに対して所定の処置を行う。例えば、図1に示す操作部4に設けられたポート部13から造影剤を注入し、湾曲部3の先端から造影剤を吐出させて胆管Bdを造影することができる。
図24に示すように、操作者は、可撓性を有するガイドワイヤーGWをポート部13の開口部13aから挿入することによって、湾曲カテーテル1内にガイドワイヤーGWを挿入することができる。
図25に示すように、操作者はガイドワイヤーGWを湾曲部3の先端から繰り出し、胆管Bdに沿ってガイドワイヤーGWを挿入する。たとえば、図26に示すように胆管Bdの内部に異物D3が有る場合、ガイドワイヤーGWを異物D3の上流側にまで案内した後に、ガイドワイヤーGWを胆管Bd内に留置したまま湾曲カテーテル1を内視鏡装置500から抜き取る。
続いて、図27に示すように、ガイドワイヤーGWに沿って第四処置具600を案内し、異物D3に対して所定の処置を行う。たとえば、胆管内の異物である結石を除去する場合には、第四処置具600として、結石を破砕する砕石バスケットを備えた内視鏡用処置具を用いることができる。
これに対して、本使用例の湾曲カテーテル1は、湾曲部3の内部に第一コイル6が設けられているので、湾曲部3を大きな曲率で湾曲させても潰れにくい。その結果、湾曲部3の最小湾曲半径をより小さくすることができる。また、第一コイル6の設置により、湾曲チューブ5の肉厚を薄くした場合にも湾曲チューブ5が潰れることを防止でき、湾曲部3をより細径にすることができる。
さらに、湾曲部3の最小湾曲半径を小さくすることができるので、従来のカテーテルを用いて胆管挿入を行う場合と比較して、カテーテルの先端の向きを胆管Bdの向きにあわせるための手順が単純になり、従来より容易に胆管Bdへの挿入を行うことができる。
本実施形態の湾曲カテーテル1と、内視鏡装置500と、湾曲カテーテル1内に挿通する第五処置具とを組み合わせて、管腔組織を連通する瘻孔(貫通孔)を形成する例を説明する。この例を用いて湾曲カテーテル1の作用および効果を説明する。
図28は、湾曲カテーテル1とともに用いられる第五処置具700の一例を示す図である。図28に示すように、本使用例では、湾曲カテーテル1内に挿通する第五処置具700として高周波メスを用いる。第五処置具700は、内視鏡装置500の処置具チャンネル540に挿通される挿入部710と、挿入部710の先端に設けられ高周波電流が通電されることによって生体組織に貫通孔を形成する針状の切開部720と、挿入部710の基端に設けられた操作部730とを有する。
本使用例では、図29に示すように、胆管Bdと十二指腸Dとの間に、胆管Bdと十二指腸Dとを繋ぐ瘻孔を形成する処置の例を示す。
図29に示すように、操作者は、患者の自然開口から体腔内に内視鏡装置500を挿入し、内視鏡装置500の挿入部120の先端を十二指腸乳頭Dpの近傍まで案内する。さらに、十二指腸Dの内壁面を観察し、瘻孔を形成するために適切な予定位置を決定する。瘻孔を形成するための適切な予定位置としては、たとえば血管Vなどを傷つけないように血管Vを避けた位置とすることが好ましい。
続いて、図30に示すように、操作者は、内視鏡装置500の撮像部530の視野に十二指腸乳頭Dpを捉え、上述の使用例3と同様に、湾曲カテーテル1の先端を胆管Bd内へ挿入する。胆管Bd内に位置する湾曲カテーテル1の位置は、X線造影を行うことによって、マーキングMや第一コイル6、第二コイル7を目安として把握することができる。
操作者は、十二指腸D側から観察することによって定めた予定位置の近傍まで湾曲カテーテル1の先端を押し込み、予定位置において十二指腸D側へ湾曲カテーテル1の先端が向くように湾曲部3を湾曲させる。本使用例では、湾曲カテーテル1は胆管Bdの中心軸に沿って配置されており、十二指腸D側へ湾曲カテーテル1の先端を向けるために、操作者は湾曲部3を略90°湾曲させる。
続いて、この貫通孔にたとえばドレナージチューブなどを取り付けて、胆管Bdと十二指腸Dを連通させる瘻孔を造設する。
なお、並走する血管同士を連通させる処置の場合も同様の手順で行うことができる。
本実施形態の湾曲カテーテル1によって体腔内で洗浄および吸引を行う例を説明する。この例を用いて湾曲カテーテル1の作用および効果を説明する。
本使用例では、腹腔鏡を用いた手術において、腹腔内の洗浄を行う例を示す。
図32に示すように、腹腔鏡を用いた手術では、腹壁Wを小切開して貫通孔を形成し、この貫通孔を通じてたとえば上述の内視鏡装置100、500や各種の処置具を体腔内へ挿入する。たとえば、腹腔内で処置を行う場合、腹壁Wに、内視鏡装置100の挿入部120(図7参照)などを挿通するための貫通孔H1を形成し、トラカールを取り付ける。
操作者は、貫通孔H1を通じて各種処置具を腹腔内へ導入し、腹腔内で処置を行う。このとき、腹腔内の生体組織から出血した場合に、この血液は腹腔内に溜まる。また、血液の一部は、生体組織の隙間に入り込むこともある。
たとえば、図32において、2つの生体組織T1、T2の間には血液B1が溜まっている。このような場合、生体組織T1、T2の隙間に入り込んだ血液を吸引し、生体組織T1、T2を洗浄することによって、病変部を見やすくしたり処置をしやすくしたりすることができる。また、生体組織T1、T2を洗浄することによって、腹腔内の臓器同士の癒着を防ぐこともできる。この場合、図1に示す湾曲カテーテル1の操作部4に形成されたポート部13に吸引ポンプを取り付けた状態で、湾曲カテーテル1が用意される。
操作者は、腹壁Wに形成された貫通孔H1を通じて湾曲カテーテル1を体腔内へ導入する。このとき、別の貫通孔を通じて体腔内へ導入された内視鏡装置などを用いて体腔内における湾曲カテーテル1の位置を把握することができる。また、操作者は、使用例1で説明した内視鏡装置100の処置具チャンネル140に湾曲カテーテル1を挿通し、内視鏡装置100の挿入部120の先端から湾曲カテーテル1の先端を露出させて湾曲カテーテル1を腹腔内へ導入してもよい。
湾曲部3の先端が血液B1の位置に到達したら、ポート部13に接続された吸引ポンプを作動させる。すると、湾曲部3の先端から、湾曲部3の内部、および第一ルーメン2c(図3参照)を通じて血液B1が吸引されて体外へ排出される。
なお、本使用例で説明した手順は、血液を排出する場合以外にも、滲出液を排出したり、腹水あるいは胸水から細胞サンプルを採取したりする場合にも適用することができる。
本実施形態の湾曲カテーテル1と、内視鏡装置100と、湾曲カテーテル1内に挿通する第五処置具700および体内観察装置(不図示)とを組み合わせて体腔内を観察する例を説明する。この例を用いて湾曲カテーテル1の作用および効果を説明する。
本使用例では、上述の使用例1と同型の内視鏡装置100を用い、胃壁に貫通孔を形成してこの貫通孔に上記体内観察装置を通して腹腔内を観察する。このような手技では、腹壁を小切開することなく腹腔内を観察することができる。
また、本使用例で湾曲カテーテル1内に挿通する体内観察装置は、先端に撮像部を備え、この撮像部によって体内を観察することができる。
図34に示すように、本使用例では、まず、患者の口から、患者の体内へ内視鏡装置100の挿入部120を挿入し、患者の胃内に挿入部120の先端を案内する。
続いて、第五処置具700を湾曲カテーテル1内にポート部13を通じて挿通し、さらに湾曲カテーテル1の先端を内視鏡装置100の処置具チャンネル140の先端から突出させる(図35参照)。
図36に示すように、操作者は、第五処置具700を用いて胃の粘膜層mを切開し、粘膜下層smを露出させる。
続いて、図37Aに示すように胃の粘膜層mと粘膜下層smとの間に湾曲カテーテル1の先端を挿入し、図37Bに示すように粘膜層mと粘膜下層smとを剥離しながら湾曲カテーテル1を粘膜層mと粘膜下層smとの間に押し込む。
続いて、図38に示すように、操作者は、粘膜層mと粘膜下層smとの間で、粘膜層mを切開した位置から離れた位置に湾曲カテーテル1の先端を移動させる。操作部4の第一ハンドル10aあるいは第二ハンドル10bを基端側へ引き、湾曲カテーテル1の湾曲部3を湾曲させる。本使用例では、湾曲カテーテル1は粘膜下層smに沿って配置されており、粘膜下層sm、筋層pm、および漿膜ssに貫通孔をあけるために、湾曲部3を直線状態から90°湾曲させて、湾曲部3の先端を粘膜下層sm、筋層pm、および漿膜ss側に向ける。
操作者は、第五処置具700の切開部720の先端を粘膜下層smに押し付け、切開部720に高周波電流を通電させる。すると、切開部720が接触している粘膜下層smは焼灼切開されて、粘膜下層smには貫通孔が形成される。さらに粘膜下層smと重なる筋層pmおよび漿膜ssにも同様に貫通孔が形成される。これにより、胃内と腹腔内を連通するトンネルが胃壁内に形成される。操作者は、粘膜下層sm、筋層pm、および漿膜ssに形成された貫通孔に湾曲部3の先端を挿入し、湾曲部3を腹腔内へと案内する。
図39に示すように、操作者は、第五処置具700を湾曲カテーテル1から抜き取り、腹腔内を撮像するための上述の体内観察装置を湾曲カテーテル1に挿通して腹腔内を観察する。なお、体内観察装置としては、光学像を取得するものや、超音波を照射して画像を生成するものなどを適宜用いることができる。
図40に示すように、腹腔内の観察が終了したら、湾曲カテーテル1を胃内へ引き戻した後に、粘膜層mの切開部をクリップC1等によって縫縮して処置を終了する。
なお、腹腔内で他の処置が必要であれば、湾曲カテーテル1を用いて形成した貫通孔を拡張するか、あるいは湾曲カテーテル1を胃内へ引き戻し粘膜層mの切開部をクリップ等によって縫縮した後に、他の貫通孔を胃壁に形成する。これにより、腹腔内における処置に用いられる内視鏡装置100その他の処置具を用いて腹腔内で必要な処置を行う。
また、従来は粘膜層mと粘膜下層smとの間にトンネルを形成するために、粘膜層mを剥離してめくりあげることが行われていた。これに対して、本使用例では、粘膜層mと粘膜下層smとの間に湾曲カテーテル1を差し込むのみであるので、粘膜層mを剥離する面積を小さくすることができ、患者に対する侵襲をさらに低減することができる。
なお、腹腔内の組織にマーカーを留置したり、腹腔内の組織に対して留置型電極を留置したりする処置を行う場合にも、本使用例と同様の手順で行うことができる。
次に、上述の実施形態で説明した湾曲カテーテル1の変形例について説明する。
図41は、本変形例の湾曲カテーテル1Aを示す図である。図42は、図41のD-D線における断面図である。図43は、図41に示す湾曲カテーテルの湾曲部を図42のE-E線において断面視する断面図である。図44は、図43のF-F線における断面図である。
図42に示すように、本体チューブ2Aは、第一チューブ2A1と、第一チューブ2A1が内部に挿通された第二チューブ2A2とからなる。第一チューブ2A1は本体チューブ2Aの中心軸OAと同軸上に中心軸OA2を有する筒状部材である。第一チューブ2A1の内部空間は、上述の実施形態で説明した第一ルーメン2cと同様に、医療用処置具やガイドワイヤを挿通させたり、送気、送水、あるいは吸引したりするために用いられる。
第一チューブ2A1の外径は、第二チューブ2A2の内径よりも小さく、第一チューブ2A1と第二チューブ2A2との間には隙間がある。本変形例では、第一チューブ2A1と第二チューブ2A2との間に湾曲操作ワイヤー8が挿通されており、第一チューブ2A1と第二チューブ2A2との間の空間が、上述の実施形態で説明した第二ルーメン2dに相当するルーメンとなっている。
第一チューブ2A1と第二チューブ2A2との材質は、上述のマルチルーメンチューブ2の材質と同様の材質とすることができる。また、第一チューブ2A1の材質と第二チューブ2A2の材質とは同一であってもよいし、互いに異なっていてもよい。
第一コイル6Aは、上述の第一コイル6と同様に金属線材によって形成された円筒コイルである。第一コイル6Aは疎巻きコイルであり、第一コイル6Aの金属線材の間の隙間の大きさは、後述する第二コイル7Aの金属線材の直径よりも大きい。
第二コイル7Aは、上述の第一コイル6Aと同様に金属線材によって形成された円筒コイルである。第二コイル7Aの巻きピッチは第一コイル6Aの巻きピッチと等しい。第一コイル6Aの中心軸に直交する方向から見たときに、第二コイル7Aと第一コイル6Aとの位置関係は、第一コイル6Aの金属線材の隙間に第二コイル7Aの金属線材の一部が入り込んだ位置関係になっている。
第一コイル6Aの金属線材の隙間に第二コイル7Aの金属線材の一部が入り込んだ部分では、第一コイル6Aの金属線材と第二コイル7Aの金属線材とは第二コイル7Aの中心軸方向に交互に並べられている。
図44に示すように、各第二コイル7Aの中心軸方向から見たときに、第一コイル6Aの外周部と第二コイル7Aの内周部とは互いに接し、かつ第一コイル6Aの内周部と第二コイル7Aの外周部とは互いに接している。第一コイル6Aの内周部より内側へ第二コイル7Aは突出しておらず、第二コイル7Aの内周部より内側へ第一コイル6Aは突出していない。このため、第一コイル6Aの内部空間は円柱形状であり、第二コイル7Aの内部空間も円柱形状である。
さらに、本変形例では、第一コイル6Aの金属線材の隙間に第二コイル7Aの金属線材の一部が入り込んだ位置関係であるので、上述の実施形態で説明した構成よりも湾曲部3を細径とすることができる。
2…マルチルーメンチューブ(本体チューブ)
2A…本体チューブ
2A1…第一チューブ
2A2…第二チューブ
2c…第一ルーメン
2d…第二ルーメン
3…湾曲部
5…湾曲チューブ
6,6A…第一コイル
7,7A…第二コイル
8…湾曲操作ワイヤー
Claims (13)
- 先端と基端とを有する可撓管状の本体チューブと、
前記本体チューブの先端側に設けられた湾曲動作可能な湾曲部と、
前記湾曲部を湾曲動作させるための湾曲操作ワイヤーと、
を備え、
前記本体チューブは、前記先端および前記基端に開口して前記先端と前記基端とを連通する第一ルーメンと第二ルーメンとを有し、
前記湾曲部は、
前記本体チューブの先端に固定され、前記本体チューブよりも柔軟な管状の湾曲チューブと、
先端が前記湾曲チューブ内に配置されているとともに基端が前記第一ルーメンに連通された内腔を有し、前記本体チューブと前記湾曲チューブとの少なくともいずれかに固定された第一コイルと、
前記第一コイルの中心軸と平行に中心軸が延び、前記第一コイルと隣接して前記湾曲チューブの内面に固定された第二コイルと、
を有し、
前記湾曲操作ワイヤーは、前記第二コイルの内腔と前記第二ルーメンを跨って挿通され、
前記湾曲操作ワイヤーの先端は、前記湾曲チューブと前記第一コイルと前記第二コイルとのいずれかに固定されている湾曲カテーテル。 - 前記第二コイルの基端は、前記第一ルーメンにおける前記先端側の開口および前記第二ルーメンにおける前記先端側の開口の何れよりも先端側にあり、
前記第一コイルは、前記第一ルーメンの内壁面に固定されている請求項1に記載の湾曲カテーテル。 - 前記第一コイルと前記第二コイルとはいずれも疎巻きである請求項1または2に記載の湾曲カテーテル。
- 前記本体チューブおよび前記湾曲チューブは光透過性を有する請求項1から3のいずれか一項に記載の湾曲カテーテル。
- 前記本体チューブは、
前記第一コイルの基端に固定され内部に前記第一ルーメンが形成された管状の第一チューブと、
前記第一チューブが内部に挿通されているとともに、前記第一チューブとの間に前記第二ルーメンを有する管状の第二チューブと、
を備えている請求項1から4のいずれか一項に記載の湾曲カテーテル。 - 前記第一コイルは前記第二コイルよりも中心軸方向の長さが長い請求項1から5のいずれか一項に記載の湾曲カテーテル。
- 前記湾曲チューブの内側には前記第二コイルが露出している請求項1から6のいずれか一項に記載の湾曲カテーテル。
- 前記第二コイルの外面は前記第一コイルの外面に接している請求項1から7のいずれか一項に記載の湾曲カテーテル。
- 前記第二コイルの各ループは、前記第一コイルの各ループの間に入り込んでおり、
前記第一コイルに前記第二コイルが入り込んだ部分では、前記第一コイルの素線と前記第二コイルの素線とが前記第一コイルの中心軸方向に沿って交互に配置されている請求項1から7のいずれか一項に記載の湾曲カテーテル。 - 前記第一コイルの素線の巻きピッチと前記第二コイルの素線の巻きピッチとは互いに等しい請求項1から9のいずれか一項に記載の湾曲カテーテル。
- 前記第一コイルと前記第二コイルとの少なくともいずれかはX線透視画像に映る材料を含有している請求項1から10のいずれか一項に記載の湾曲カテーテル。
- 前記第一コイルの先端と前記第二コイルの先端とがロウ付け、半田付け、あるいは溶接によって固定されている請求項1から11のいずれか一項に記載の湾曲カテーテル。
- 前記第二コイルの先端と前記湾曲操作ワイヤの先端とがロウ付け、半田付け、あるいは溶接によって固定されている請求項1から12のいずれか一項に記載の湾曲カテーテル。
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012517020A JP5191615B2 (ja) | 2010-09-23 | 2011-08-04 | 湾曲カテーテル |
| EP11826645.1A EP2589405B1 (en) | 2010-09-23 | 2011-08-04 | Bendable catheter |
| CN201180044266.0A CN103096964B (zh) | 2010-09-23 | 2011-08-04 | 弯曲导管 |
| US13/440,303 US8486010B2 (en) | 2010-09-23 | 2012-04-05 | Bendable catheter |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US38572710P | 2010-09-23 | 2010-09-23 | |
| US61/385,727 | 2010-09-23 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US13/440,303 Continuation US8486010B2 (en) | 2010-09-23 | 2012-04-05 | Bendable catheter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2012039199A1 true WO2012039199A1 (ja) | 2012-03-29 |
Family
ID=45873694
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2011/067849 Ceased WO2012039199A1 (ja) | 2010-09-23 | 2011-08-04 | 湾曲カテーテル |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US8486010B2 (ja) |
| EP (1) | EP2589405B1 (ja) |
| JP (1) | JP5191615B2 (ja) |
| CN (1) | CN103096964B (ja) |
| WO (1) | WO2012039199A1 (ja) |
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| JP2023506192A (ja) * | 2019-12-13 | 2023-02-15 | タウ カーディオ インコーポレイテッド | 中隔交差システム |
| JP2024129507A (ja) * | 2023-03-13 | 2024-09-27 | 日本ライフライン株式会社 | カテーテルシャフト、カテーテル装置及びカテーテルシャフトの製造方法 |
Families Citing this family (32)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9332973B2 (en) | 2008-10-01 | 2016-05-10 | Covidien Lp | Needle biopsy device with exchangeable needle and integrated needle protection |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001009042A (ja) * | 1999-06-30 | 2001-01-16 | Piolax Inc | カテーテル |
| JP2002272675A (ja) | 2001-03-16 | 2002-09-24 | Olympus Optical Co Ltd | カテーテル |
| JP2005501613A (ja) * | 2001-08-31 | 2005-01-20 | ボストン サイエンティフィック リミテッド | 改良型遠位先端および移行部を備えたマイクロカテーテル |
| WO2009054509A1 (ja) * | 2007-10-26 | 2009-04-30 | Terumo Kabushiki Kaisha | カテーテル |
Family Cites Families (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57148927A (en) * | 1981-03-06 | 1982-09-14 | Olympus Optical Co | Tube for pouring contrast agent |
| DE69029358T2 (de) * | 1989-10-13 | 1997-06-12 | Machida Endoscope Co Ltd | Beugevorrichtung |
| US5820591A (en) * | 1990-02-02 | 1998-10-13 | E. P. Technologies, Inc. | Assemblies for creating compound curves in distal catheter regions |
| US6139510A (en) * | 1994-05-11 | 2000-10-31 | Target Therapeutics Inc. | Super elastic alloy guidewire |
| JP3632932B2 (ja) | 1994-07-11 | 2005-03-30 | テルモ株式会社 | カテーテルチューブ |
| US5658264A (en) * | 1994-11-10 | 1997-08-19 | Target Therapeutics, Inc. | High performance spiral-wound catheter |
| JP3477570B2 (ja) | 1997-06-02 | 2003-12-10 | 正喜 江刺 | 能動導管とその製造方法 |
| US6102887A (en) * | 1998-08-11 | 2000-08-15 | Biocardia, Inc. | Catheter drug delivery system and method for use |
| US6198974B1 (en) * | 1998-08-14 | 2001-03-06 | Cordis Webster, Inc. | Bi-directional steerable catheter |
| JP2000070269A (ja) | 1998-09-01 | 2000-03-07 | Honda Seiki Kk | 磁気センサー及び感圧センサーによりバーチャル・リアリティに誘導される能動内視鏡とその操作システム。 |
| US6500147B2 (en) * | 1999-02-22 | 2002-12-31 | Medtronic Percusurge, Inc. | Flexible catheter |
| US6267746B1 (en) * | 1999-03-22 | 2001-07-31 | Biosense Webster, Inc. | Multi-directional steerable catheters and control handles |
| EP1068876B1 (en) * | 1999-07-16 | 2004-01-14 | Terumo Kabushiki Kaisha | Catheter and method of manufacturing the same |
| DE19936904A1 (de) * | 1999-07-30 | 2001-02-01 | Biotronik Mess & Therapieg | Katheter |
| US6530897B2 (en) * | 2000-04-28 | 2003-03-11 | Mahase Nardeo | Steerable medical catheter with bendable encapsulated metal spring tip fused to polymeric shaft |
| US7591813B2 (en) | 2003-10-01 | 2009-09-22 | Micrus Endovascular Corporation | Long nose manipulatable catheter |
| CA2569378A1 (en) | 2004-06-14 | 2005-12-29 | Applied Medical Resources Corporation | Steerable vascular sheath |
-
2011
- 2011-08-04 EP EP11826645.1A patent/EP2589405B1/en active Active
- 2011-08-04 JP JP2012517020A patent/JP5191615B2/ja active Active
- 2011-08-04 WO PCT/JP2011/067849 patent/WO2012039199A1/ja not_active Ceased
- 2011-08-04 CN CN201180044266.0A patent/CN103096964B/zh active Active
-
2012
- 2012-04-05 US US13/440,303 patent/US8486010B2/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001009042A (ja) * | 1999-06-30 | 2001-01-16 | Piolax Inc | カテーテル |
| JP2002272675A (ja) | 2001-03-16 | 2002-09-24 | Olympus Optical Co Ltd | カテーテル |
| JP2005501613A (ja) * | 2001-08-31 | 2005-01-20 | ボストン サイエンティフィック リミテッド | 改良型遠位先端および移行部を備えたマイクロカテーテル |
| WO2009054509A1 (ja) * | 2007-10-26 | 2009-04-30 | Terumo Kabushiki Kaisha | カテーテル |
Non-Patent Citations (1)
| Title |
|---|
| See also references of EP2589405A4 |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2022537482A (ja) * | 2019-05-24 | 2022-08-26 | ベクトン・ディキンソン・アンド・カンパニー | 関節式補強カニューレ、アクセスセット、およびその方法 |
| JP7376612B2 (ja) | 2019-05-24 | 2023-11-08 | ベクトン・ディキンソン・アンド・カンパニー | 関節式補強カニューレ、アクセスセット、およびその方法 |
| JP2023506192A (ja) * | 2019-12-13 | 2023-02-15 | タウ カーディオ インコーポレイテッド | 中隔交差システム |
| JP7526264B2 (ja) | 2019-12-13 | 2024-07-31 | タウ カーディオ インコーポレイテッド | 中隔交差システム |
| JP2024129507A (ja) * | 2023-03-13 | 2024-09-27 | 日本ライフライン株式会社 | カテーテルシャフト、カテーテル装置及びカテーテルシャフトの製造方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| US20120265132A1 (en) | 2012-10-18 |
| CN103096964B (zh) | 2015-10-21 |
| CN103096964A (zh) | 2013-05-08 |
| EP2589405A4 (en) | 2015-05-20 |
| US8486010B2 (en) | 2013-07-16 |
| EP2589405A1 (en) | 2013-05-08 |
| EP2589405B1 (en) | 2017-01-25 |
| JPWO2012039199A1 (ja) | 2014-02-03 |
| JP5191615B2 (ja) | 2013-05-08 |
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