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WO2016158171A1 - Ensemble cathéter - Google Patents

Ensemble cathéter Download PDF

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Publication number
WO2016158171A1
WO2016158171A1 PCT/JP2016/056355 JP2016056355W WO2016158171A1 WO 2016158171 A1 WO2016158171 A1 WO 2016158171A1 JP 2016056355 W JP2016056355 W JP 2016056355W WO 2016158171 A1 WO2016158171 A1 WO 2016158171A1
Authority
WO
WIPO (PCT)
Prior art keywords
guide wire
catheter assembly
catheter
fixed
movable
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2016/056355
Other languages
English (en)
Japanese (ja)
Inventor
石田昌弘
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Terumo Corp
Original Assignee
Terumo Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Terumo Corp filed Critical Terumo Corp
Publication of WO2016158171A1 publication Critical patent/WO2016158171A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/158—Needles for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body
    • 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
    • A61M25/06—Body-piercing guide needles or the like
    • 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
    • A61M25/09—Guide wires

Definitions

  • the present invention relates to a catheter assembly that punctures and indwells a blood vessel when, for example, infusion is performed on a patient.
  • a catheter assembly when an infusion or the like is performed on a patient, for example, a catheter assembly is used.
  • This type of catheter assembly includes a hollow catheter, a catheter hub fixed to the proximal end of the catheter, a hollow inner needle that is inserted into the catheter and has a sharp needle tip, and a proximal end of the inner needle. And a needle hub fixed to the head.
  • the catheter assembly in order to facilitate insertion of a catheter into a blood vessel, the catheter assembly is inserted into the lumen of the inner needle so as to be slidable in the axial direction. Some have a guide wire that can protrude from the tip of the needle.
  • the present invention has been made in order to solve the above-described problem, and without increasing the size of the device, the amount of the guide wire protruding from the needle tip of the inner needle can be increased, so that the catheter is inserted into the living body. It is an object to provide a catheter assembly that can be inserted better.
  • a catheter assembly includes a catheter, a catheter hub that fixes and holds the catheter, and a needle tip that is removably inserted into the catheter.
  • a guide wire operating member for operating movement, and the needle hub is provided with at least one or more fixed-side guide portions through which the guide wire is slidably inserted and having a fixed-side folded portion at an intermediate position,
  • the guide wire operating member is slidably inserted through the guide wire, and is provided with at least one movable side guide portion having a movable side folded portion at an intermediate position.
  • the catheter assembly is configured such that the guide wire is slidably inserted into the fixed side and movable side guide portions, and the guide wire is folded between the fixed side folded portion and the movable side folded portion, whereby the needle of the inner needle
  • the guide wire can be sufficiently projected from the tip. That is, the guide wire is inserted into the fixed side guide portion and the movable side guide portion, respectively, so that three or more passes between them. Under the operation of the guide wire operating member by the user, the fixed side guide portion and the movable side guide portion are passed. When the distance between the portions is reduced, the three or more guide wires are shortened.
  • the guide wire moves long (moves at least three times the operation distance of the guide wire operating member) and protrudes from the needle tip.
  • the catheter assembly can increase the protrusion amount of a guide wire without enlarging an apparatus, and can insert a catheter more favorably in the living body.
  • the end of the guide wire opposite to the end protruding from the needle tip is fixedly held by the guide wire operating member.
  • the end portion of the guide wire is fixedly held by the guide wire operating member, so that the relative movement of the guide wire can be smoothly operated. Further, the guide wire passes between the fixed-side guide portion and the movable-side guide portion an odd number of three or more times, and the guide wire can be sufficiently delivered from the needle tip.
  • the guide wire may be fixedly held on the needle hub at the end opposite to the end protruding from the needle tip.
  • the guide wire can be operated by moving the guide wire operation member back and forth. Further, the guide wire passes between the fixed-side guide portion and the movable-side guide portion an even number of four or more times, and the guide wire can be sufficiently delivered from the needle tip.
  • the guide wire may be configured to project the guide wire from the needle tip by movement of the guide wire operating member in the distal direction.
  • the guide wire may be configured to protrude from the needle tip by movement of the guide wire operating member in the proximal direction.
  • the user can send out the guide wire largely by a simple operation of moving the guide wire operating member in the proximal direction in the vicinity of the distal end side holding the catheter assembly while the inner needle is punctured. it can.
  • the guide wire operating member protrudes outwardly from the outer peripheral surface of the needle hub, and the guide wire is pressed by the guide wire operating member in a direction opposite to the protruding direction of the guide wire.
  • the wire may protrude from the needle tip.
  • the user can send out the guide wire largely by a simple operation of pressing the guide wire operating member in the vicinity of the distal end side holding the catheter assembly while the inner needle is punctured.
  • the fixed-side guide portion and the movable-side guide portion have a port that exposes the guide wire and faces each other, and the guide wire is formed between the fixed-side guide portion and the movable-side guide portion. In the meantime, it is preferable to extend linearly along the moving direction of the guide wire operating member.
  • the guide wire extends in parallel with the relative movement direction of the guide wire operating member in this way, the guide wire is smoothly moved between the fixed side guide portion and the movable side guide portion, and the guide wire is sent out. Necessary operating force can be reduced.
  • the fixed-side folded portion and the movable-side folded portion communicate with the port and be formed in an arc shape in a cross-sectional view.
  • the fixed-side folded portion and the movable-side folded portion are formed in an arc shape in a cross-sectional view, so that the fixed-side guide portion and the movable-side guide portion more easily guide the guide wire when the guide wire operating member is relatively moved. Smooth sliding is possible.
  • the fixed side guide portion includes a first fixed side port into which the guide wire as the port is inserted, and a second fixed side port from which the guide wire protrudes. It is good to have the 1st movable side port in which the guide wire which is a port is inserted, and the 2nd movable side port from which the guide wire protrudes.
  • the guide wire is inserted from the first fixed side port to the second fixed side port, and is inserted from the first movable side port to the second movable side port, and the path including the fixed side and the movable side guide portion is passed. It can slide smoothly.
  • first fixed side port and the second fixed side port communicate with the fixed side folded portion
  • first movable side port and the second movable side port communicate with the movable side folded portion. You may do it.
  • the catheter assembly can smoothly form the guide wire path inside the needle hub and the guide wire operating member, and the guide wire can be slid even more smoothly.
  • the second fixed side port and the first movable side port are opposed to each other, and the guide wire protruding from the second fixed side port is inserted into the first movable side port.
  • the second movable side port and the first fixed side port are opposed to each other, and the guide wire protruding from the second movable side port is inserted into the first fixed side port. Can do.
  • the catheter assembly can better insert the catheter into the living body by increasing the protruding amount of the guide wire protruding from the needle tip of the inner needle without increasing the size of the device. .
  • FIG. 2 is an exploded perspective view of the catheter assembly of FIG. 1.
  • FIG. 2 is a partial plan sectional view of the catheter assembly of FIG. 1.
  • 6A is an enlarged perspective view of the proximal end side of the guide wire operating member of FIG. 4, and
  • FIG. 6B is a front view of the guide wire operating member.
  • FIG. 7A is an enlarged perspective view showing a guide wire insertion path of the needle holding portion and the insertion body portion
  • FIG. 7B is an enlarged perspective view showing a state when the insertion body portion is advanced.
  • FIG. 8A is a schematic view showing the protrusion of the guide wire of the catheter assembly of FIG. 1
  • FIG. 8B is a schematic view showing the protrusion of the guide wire of the catheter assembly according to the second embodiment
  • FIG. FIG. 10 is a schematic view showing the protrusion of the guide wire of the catheter assembly according to the third embodiment.
  • FIG. 9 is an enlarged perspective view showing a guide wire insertion path of the catheter assembly of FIG. 8B. It is an expansion perspective view which shows the penetration path
  • FIG. 13 is a partially exploded perspective view showing the catheter assembly of FIG. 12.
  • 14A is an enlarged perspective view showing the proximal end side of the guide wire operating member of FIG. 12, and
  • FIG. 14B is a perspective view showing another configuration example of the movable side passage of the catheter assembly of FIG. .
  • FIG. 13 is an enlarged perspective view showing a guide wire insertion path of the catheter assembly of FIG. 12. It is a schematic diagram which shows protrusion of the guide wire of the catheter assembly which concerns on 5th Embodiment.
  • FIG. 17 is a partially exploded perspective view showing the catheter assembly of FIG. 16.
  • 18A is a perspective view showing the guide wire operating member of FIG. 16
  • FIG. 18B is a perspective view showing the vicinity of the attachment opening of the lid of FIG.
  • FIG. 17 is an enlarged perspective view showing a guide wire insertion path of the catheter assembly of FIG. 16.
  • the catheter assembly 10 is an indwelling needle that is applied when transfusion, blood transfusion, or the like is performed on a patient (living body), and that is punctured and placed in the patient's body to serve as an introduction unit for a medical solution or the like.
  • the catheter assembly 10 has a function of delivering a guide wire 22 through the inside of the inner needle 12 as shown in FIG. 1 in order to improve the workability of users such as doctors and nurses.
  • the catheter assembly 10 can be configured as a catheter having a longer length than the peripheral venous catheter (for example, a central venous catheter, a PICC, a midline catheter, etc.).
  • the catheter assembly 10 may be configured as a peripheral venous catheter.
  • the catheter assembly 10 is not limited to a venous catheter, and may be configured as an arterial catheter such as a peripheral artery catheter.
  • the catheter assembly 10 includes an inner needle 12, a housing 14 (needle hub), a catheter 16, a catheter hub 18 (see FIG. 3), a catheter operating member 20, a guide wire 22, a guide wire operating member 24, and a protector 26 (see FIG. 3). ).
  • the catheter assembly 10 is in an initial state before use, and the inner needle 12 and the catheter 16 are doubled, and a guide wire 22 is inserted to the proximal end side of the needle tip 12a in the inner needle 12, and the distal end of the housing 14 is inserted. Protruding from. In the housing 14, a catheter hub 18, a catheter operating member 20, a guide wire operating member 24, and a protector 26 are accommodated.
  • the user grasps the housing 14 and punctures the inner needle 12 and the tip of the catheter 16 into the blood vessel (vein or artery) of the patient. Further, while maintaining the puncture state, the user advances the guide wire operation member 24 relative to the housing 14 in the distal direction as shown in FIG. 2, thereby moving the guide wire 22 from the needle tip 12a. Send it out.
  • the catheter assembly 10 can deliver the guide wire 22 sufficiently longer than the operation distance. The guide wire 22 delivered from the needle tip 12a enters deeply along the blood vessel.
  • the user advances the catheter hub 18 relative to the housing 14 to further advance the catheter 16 further to the distal end side (that is, the inner part of the blood vessel) than the inner needle 12.
  • the catheter 16 is inserted into the blood vessel along the guide wire 22 that has previously entered the blood vessel.
  • the protector 26 holding the catheter hub 18 is extended as shown in FIG. Is housed inside the protector 26.
  • the protector 26 prevents the inner needle 12 from being exposed to the outside, and prevents false puncture, blood contamination, and the like.
  • the protector 26 releases the holding of the catheter hub 18 and places the catheter 16 and the catheter hub 18 in place.
  • the catheter assembly 10 will be specifically described.
  • the inner needle 12 of the catheter assembly 10 is configured as a hollow tubular body having rigidity capable of puncturing a living body skin.
  • a sharp needle tip 12 a is formed at the tip of the inner needle 12.
  • a through hole 30 is provided in the inner needle 12 along the axial direction.
  • the through hole 30 has a distal end opening 30 a provided in the needle tip 12 a and a proximal end provided at the proximal end of the inner needle 12. It communicates with the opening 30b (see FIG. 5).
  • the inner needle 12 may have a groove formed along the axial direction.
  • the inner needle 12 is firmly fixed to the housing 14 by an appropriate fixing method (fusion, adhesion, insert molding, etc.).
  • the constituent material of the inner needle 12 include stainless steel, aluminum or aluminum alloy, metal material such as titanium or titanium alloy, hard resin, ceramics, and the like.
  • the housing 14 is formed in a cylindrical shape having a thickness and a length that can be easily gripped by the user.
  • a plurality of ribs 14 a that circulate in the circumferential direction are formed on the outer peripheral surface from the vicinity of the front end of the housing 14 to the intermediate portion in the axial direction so that the user can easily grasp the housing 14.
  • the housing 14 includes a housing main body 32 having an internal space 32a, a needle holding portion 34 that holds the inner needle 12 and is disposed in the internal space 32a, covers the upper side of the internal space 32a, and an external appearance of the housing 14 together with the housing main body 32. And a lid 36 constituting the above.
  • the housing main body 32 has an elongated bowl shape formed by the lower wall 38, the rear wall 40, and the pair of side walls 42, and forms an internal space 32a on the inner side.
  • the front end side of the lower wall 38 is gently inclined upward in the front end direction to shallow the internal space 32a.
  • a guide groove (not shown) for guiding the relative movement of the protector 26 and an arrangement portion 38a (see FIG. 5) for fixing the needle holding portion 34 are provided.
  • the rear wall 40 and the pair of side walls 42 protrude upward from the sides of the lower wall 38, and the upper sides are formed at the same height.
  • the lid body 36 is attached to the upper side of the rear wall 40 and the pair of side walls 42.
  • a cutout portion 42 a into which the lateral operation portion 58 of the catheter operation member 20 is inserted is formed on the distal end side of the pair of side walls 42.
  • the needle holding portion 34 is formed in a rectangular block that is long in the vertical direction, and the proximal end portion of the inner needle 12 is attached to the hollow inner needle fixing portion 44 provided in the vertical direction and the width direction central portion of the needle holding portion 34. Inserted and held firmly.
  • a fixed side passage 46 (fixed side guide portion) through which the guide wire 22 is slidably passed is formed inside the needle holding portion 34. The configuration of the fixed side passage 46 will be described in detail later.
  • the lower part of the needle holding part 34 is fixed to the arrangement part 38 a of the housing main body 32, and the upper part is fixed to the lid 36.
  • the arrangement portion 38a is fixed by surrounding the base end surface 34a and the side surface of the needle holding portion 34 with a frame so that the needle holding portion 34 is not displaced.
  • a U-shaped fixed convex portion 36 a that is inserted into the upper inside (communication space 34 b) of the needle holding portion 34 and fixes the upper side of the needle holding portion 34 on the lower surface of the lid 36. Is provided.
  • the housing 14 (housing main body 32, needle holding portion 34, lid 36) is preferably made of a relatively hard material so that the user can easily operate it.
  • the constituent material of the housing 14 is not particularly limited.
  • a thermoplastic resin such as polypropylene, polycarbonate, polyamide, polysulfone, polyarylate, and methacrylate-butylene-styrene copolymer may be preferably used.
  • the catheter 16 of the catheter assembly 10 is formed into a tube body that is more flexible than the inner needle 12. Inside the catheter 16, an inner needle 12 is accommodated, and a lumen 16a through which a drug solution, blood, and the like can flow is formed so as to penetrate along the axial direction.
  • the length of the catheter 16 is not particularly limited, and is appropriately set according to the application, various conditions, and the like. The length of the catheter 16 is, for example, set to about 20 to 500 mm, or set to about 30 to 400 mm, or set to about 100 to 300 mm.
  • the constituent material of the catheter 16 is not particularly limited, but a soft resin material is suitable, for example, polytetrafluoroethylene (PTFE), ethylene-tetrafluoroethylene copolymer (ETFE), perfluoroalkoxy fluororesin.
  • PTFE polytetrafluoroethylene
  • ETFE ethylene-tetrafluoroethylene copolymer
  • Fluorine resins such as (PFA), olefin resins such as polyethylene and polypropylene, or a mixture thereof, polyurethane, polyester, polyamide, polyether nylon resin, a mixture of the olefin resin and an ethylene / vinyl acetate copolymer, etc. can give.
  • the proximal end portion of the catheter 16 is fixed to the distal end portion in the catheter hub 18 by an appropriate fixing method (caulking, fusing, bonding, etc.).
  • the catheter hub 18 is exposed on the patient's skin in a state where the catheter 16 is inserted into the blood vessel, and is affixed with a tape or the like and placed with the catheter 16.
  • the catheter hub 18 is made of a material harder than the catheter 16 and is formed in a cylindrical shape tapered in the distal direction.
  • the catheter hub 18 may be configured by appropriately adopting, for example, the materials raised in the housing 14.
  • An infusion tube connector (not shown) can be connected to the proximal end side of the catheter hub 18.
  • the catheter hub 18 is provided with a hollow portion 18a that communicates with the lumen 16a of the catheter 16 and allows the infusion agent to flow therethrough.
  • the hollow portion 18a may contain a hemostasis valve, a plug, etc. (not shown) that prevent backflow of blood when the inner needle 12 is punctured and enables infusion with insertion of a connector of an infusion tube.
  • a ring-shaped flange portion 48 is formed to project from the outer peripheral surface of the proximal end side of the catheter hub 18.
  • a pair of connection protrusions 50 to which the catheter operating member 20 is rotatably connected are formed on the outer peripheral surface of the catheter hub 18.
  • the catheter operation member 20 is attached to the upper side of the catheter hub 18 so that the user operates the catheter 16 and the catheter hub 18 to advance and retract.
  • the catheter operating member 20 has a body portion 52 extending in the axial direction formed in a flat plate shape.
  • a pair of connection pieces 54 that can be attached to and detached from the pair of connection protrusions 50 are provided at the base end portion of the body portion 52, and an upper operation for the user to operate the catheter operation member 20 at the distal end portion of the body portion 52.
  • a unit 56 and a lateral operation unit 58 are provided.
  • connection piece 54 is kept engaged with the connection protrusion 50 in a state parallel to the axial direction of the catheter hub 18, thereby preventing the catheter operating member 20 from being separated from the catheter hub 18.
  • the connection protrusion 50 and the connection piece 54 are engaged. Canceled. Thereby, the catheter operating member 20 can be separated from the catheter hub 18.
  • the protector 26 has a plurality (four in this embodiment) of cylinders, and in an initial state, the cylinders are coaxially overlapped to form a shortened state (multiplex structure).
  • the distal end portion of the protector 26 locks the catheter hub 18.
  • each cylindrical body extends and expands stepwise in a stepwise manner, accommodates the inner needle 12 therein (see also FIG. 3), and the protector 26.
  • the distal end of the catheter unlocks the catheter hub 18.
  • the inner cylinder 60, the outer cylinder 62, the first relay cylinder 64, and the second relay cylinder 66 are referred to.
  • the inner cylinder 60 of the protector 26 includes a block accommodating portion 68 in which a hollow portion 68a is formed, a block member 70 that is movably accommodated in the hollow portion 68a, and a head that protrudes short from the block accommodating portion 68 in the distal direction. 72, a pair of engaging arms 74 that protrude in the distal direction from both side surfaces of the block accommodating portion 68 and can be elastically deformed, and a first extending cylinder portion 76 that protrudes in the proximal direction from the block accommodating portion 68.
  • the block member 70 is disposed on the lower side of the cavity portion 68 a with the displacement in the upward direction restricted by the inner needle 12 passing through the cavity portion 68 a, and is provided on the block member 70 and the outer cylinder 62.
  • the inner cylinder 60 is prevented from moving relative to the outer cylinder 62 in the distal direction under a contact action with an inclined guide surface (not shown).
  • the block member 70 can be lifted so that the inner cylinder 60 is moved relative to the outer cylinder 62. Relative movement is possible in the tip direction.
  • the block member 70 When the inner cylinder 60 advances relative to the outer cylinder 62, the block member 70 is guided by the guide surface of the outer cylinder 62, moves upward, and is locked at an appropriate height. The block member 70 is opposed to the needle tip 12a accommodated in the first extending cylindrical portion 76 at the locking position, thereby preventing the inner needle 12 from being exposed from the tip of the protector 26.
  • the head 72 is detachably inserted and fitted into the hollow portion 18a of the catheter hub 18.
  • the engagement arm 74 is accommodated in the distal end portion (the distal end case portion 78 described later) of the outer cylinder 62 with the distal end engaged with the flange portion 48 of the catheter hub 18. It is blocked from opening.
  • the engagement arm 74 protrudes from the distal end portion of the outer cylinder 62 and opens, whereby the engagement of the engagement arm 74 with the catheter hub 18 is released.
  • the protector 26 including the inner cylinder 60 can be detached from the catheter hub 18.
  • the first extending cylinder part 76 has an inner cylinder side accommodation space 76a that is formed so as to slidably accommodate the inner needle 12 and communicates with the cavity part 68a. Further, a protrusion 76b is formed on the outer peripheral surface of the first extending cylinder portion 76 so as to protrude upward.
  • the outer cylinder 62 has a distal end side case 78 formed in a box shape with the distal end and upper part open, and a second extending cylinder 80 extending from the distal case case 78 in the proximal direction.
  • the tip case portion 78 accommodates the block accommodating portion 68 of the inner cylinder 60, the pair of engaging arms 74, and the block member 70 in the initial state.
  • the second extending cylinder part 80 has an outer cylinder side accommodation space 80 a that is formed so as to slidably accommodate the first extension cylinder part 76 and communicates with the space of the tip case part 78.
  • an outer cylinder side outer convex portion 80b is formed to protrude outward.
  • an elongated hole 80c communicating with the outer cylinder side accommodation space 80a is formed in the upper part of the second extending cylinder portion 80. The long hole 80c arranges the protrusion 76b of the first extending cylinder portion 76 and prevents the outer cylinder 62 from coming off when the inner cylinder 60 is advanced.
  • the first relay cylinder 64 includes a first relay cylinder side accommodation space 64a formed so as to penetrate the second extension cylinder portion 80 so as to be slidable.
  • a ring-shaped first relay cylinder side inner convex portion 64b is formed to project inward from the inner peripheral surface of the distal end side of the first relay cylinder side accommodation space 64a.
  • the first relay cylinder side inner convex part 64b prevents the outer cylinder side outer convex part 80b from coming off when the outer cylinder 62 advances relative to the first relay cylinder 64 at the time of separation.
  • a first relay cylinder-side outer convex portion 64 c is formed on the proximal end side outer peripheral surface of the first relay cylinder 64 so as to protrude outward.
  • the second relay cylinder 66 has a second relay cylinder-side accommodation space 66a that is formed in a full length longer than the first relay cylinder 64 and is formed so as to penetrate the first relay cylinder 64 in a slidable manner.
  • a ring-shaped second relay cylinder side inner convex portion 66b protrudes inward from the inner peripheral surface of the distal end side of the second relay cylinder side accommodation space 66a.
  • the second relay cylinder side inner convex portion 66b prevents the first relay cylinder side outer convex portion 64c from coming off when the first relay cylinder 64 advances relative to the second relay cylinder 66 at the time of separation. .
  • a pair of upper guide protrusions 81 are formed to protrude upward and a pair of lower guide protrusions 82 are formed to protrude downward on the base end side outer peripheral surface of the second relay cylinder 66.
  • the pair of upper guide protrusions 81 are guided by protrusions (not shown) formed on the lower surface of the lid body 36.
  • the pair of lower guide protrusions 82 are inserted and guided in guide grooves (not shown) of the housing main body 32, and come into contact with the leading edge of the guide grooves when the second relay cylinder 66 is advanced, whereby the second relay from the housing 14. The cylinder 66 is prevented from coming off.
  • a slit 66c is provided on the proximal end side of the second relay cylinder 66 from the proximal end toward the distal end.
  • a pair of slits 66c are formed on the top and bottom of the peripheral wall of the second relay cylinder 66, and the needle holder 34 is disposed in the initial state (see FIG. 5).
  • the guide wire operating member 24 includes a distal end side operation plate portion 84, a pair of extending portions 86 extending in the proximal direction from the operation plate portion 84, and the base ends of the pair of extending portions 86. It includes a bridging portion 88 that bridges, and an insertion body portion 90 that is connected to the bridging portion 88 and guides the guide wire 22 through.
  • the operation plate portion 84 is disposed on the upper surface of the catheter operation member 20 in the exposed portion of the housing 14 on the distal end side with respect to the lid body 36.
  • the base end side of the operation plate portion 84 is inclined upward in the base end direction, and a pair of extending portions 86 are connected to both sides thereof. Further, an operation protrusion 84 a for the user to operate the guide wire operation member 24 is formed to protrude from the upper end of the operation plate portion 84.
  • the pair of extending portions 86 extend in the proximal direction from the operation plate portion 84 with a length that is approximately the same as the entire length (length in the longitudinal direction) of the lid body 36 of the housing 14, and the insertion body portion 90 extends through the inner space 32 a. It is arranged on the base end side.
  • a hinge portion 86 a is provided near the tip of the pair of extending portions 86, and the hinge portion 86 a can change the angle of the operation plate portion 84 with respect to the extending portion 86.
  • the insertion body portion 90 is formed in a rectangular block that is long in the vertical direction like the needle holding portion 34, and protrudes in the distal direction from the intermediate position in the width direction of the bridging portion 88.
  • the distal end surface 90a of the insertion body portion 90 is disposed opposite to the proximal end surface 34a of the needle holding portion 34 in the accommodated state of the internal space 32a, and advances and retreats in the internal space 32a by transmitting the operation force of the operation plate portion 84.
  • a movable side passage 92 movable side guide portion
  • a wire fixing portion that holds the proximal end portion of the guide wire 22.
  • the movable-side passage 92 is formed in a cavity that communicates with the first movable-side port 92a and the second movable-side port 92b provided on the distal end surface 90a.
  • the first movable side port 92a is provided near the corner on the upper side and the left side of the front end surface 90a in front view (see FIG. 6B), and the second movable side port 92b is in front end view 90a in front view.
  • the first movable side port 92a is provided near the corner on the upper side and the left side of the front end surface 90a in front view (see FIG. 6B)
  • the second movable side port 92b is in front end view 90a in front view. At the center of the top and bottom and the width direction.
  • the movable-side passage 92 extends linearly from the first movable-side port 92a in the proximal direction, and is a U-shaped movable-side folded portion on the proximal side. It turns back at 92c, extends linearly in the distal direction, and reaches the second movable side port 92b. That is, the insertion body 90 has a guide path for the guide wire 22 that is inclined with respect to the longitudinal direction.
  • the movable-side passage 92 is preferably set to a diameter (slightly larger than the outer diameter of the guide wire 22) that allows the guide wire 22 to slide smoothly and without bending.
  • the insertion body portion 90 is a communication space in which the mold comes out to the proximal end side of the movable-side folded portion 92c. 90b, and is configured to insert another obturator plug 96.
  • the distal end side of the blocking plug 96 is formed in an arc shape that is aligned with the movable-side folded portion 92c, and the movable-side folded portion 92c is appropriately sized as the blocking plug 96 is fitted into the communication space 90b.
  • the wire fixing portion 94 is formed in a straight and thin cavity (similar to or slightly smaller in diameter than the movable side passage 92), and is provided in the vicinity of the corner on the upper side and the right side of the distal end surface 90a in front view.
  • the wire fixing portion 94 communicates with the exposure port 94a of the distal end surface 90a and extends linearly along the axial direction of the catheter assembly 10.
  • the wire fixing portion 94 is fixedly held by the guide wire 22 by an appropriate fixing method such as fusion or adhesion, and protrudes in the distal direction.
  • the guide wire 22 held by the wire fixing portion 94 is inserted into the movable side passage 92 through the needle holding portion 34 toward the needle holding portion 34 as shown in FIG. 7A. Therefore, as described above, the needle holding portion 34 is provided with the inner needle fixing portion 44 that holds the inner needle 12 and the fixed-side passage 46 through which the guide wire 22 is slidable.
  • the inner needle fixing portion 44 is formed in a cavity extending linearly with a diameter that is in close contact with the outer peripheral surface of the inner needle 12, and penetrates the distal end and the proximal end of the needle holding portion 34.
  • the through hole 30 of the inner needle 12 communicates with the insertion port 44 a of the inner needle fixing portion 44 formed on the proximal end surface 34 a of the needle holding portion 34 while the inner needle fixing portion 44 is held.
  • the insertion port 44a is provided at the top and bottom of the base end surface 34a and at the center in the width direction, and is formed in a funnel shape so that the guide wire 22 can be easily passed through the through hole 30.
  • the fixed side passage 46 is provided on the upper side of the needle holding portion 34 and is formed in a cavity communicating with the first fixed side port 46a and the second fixed side port 46b provided on the base end surface 34a. 7A, the first fixed side port 46a is provided in the vicinity of the left corner of the base end surface 34a, and the second fixed side port 46b is provided on the right side of the base end surface 34a. Provided near the corner.
  • the fixed-side passage 46 extends linearly from the first fixed-side port 46a in the distal direction, folds back at a U-shaped fixed-side folded portion 46c on the distal end side, and extends linearly in the proximal direction toward the second fixed side. It reaches port 46b.
  • the fixed side passage 46 is preferably formed to have a diameter that allows the guide wire 22 to slide smoothly without turning. Further, in order to easily manufacture (for example, mold forming) the needle holding part 34 having the fixed side passage 46, a communication space 34b through which the mold is removed is formed above the fixed side folded part 46c. The fixed convex portion 36a of the lid body 36 is inserted into the communication space 34b in the assembled state.
  • the exposure port 94a and the first fixed side port 46a face each other, and the first movable side port 92a and the second fixed side port 46b face each other.
  • the second movable side port 92b and the insertion port 44a face each other.
  • the guide wire 22 held by the wire fixing portion 94 is inserted into the through-hole 30 of the inner needle 12 through the fixed-side folded portion 46c of the fixed-side passage 46 and the movable-side folded portion 92c of the movable-side passage 92, and the tip Is disposed on the proximal end side of the needle tip 12a.
  • the catheter assembly 10 according to the present embodiment is basically configured as described above, and the effects thereof will be described below.
  • the catheter assembly 10 is used when constructing an infusion part for an infusion to a patient.
  • the inner needle 12 exposes the needle tip 12 a through the inside of the protector 26 (inner cylinder side accommodation space 76 a), the hollow portion 18 a of the catheter hub 18, and the lumen 16 a of the catheter 16.
  • the operation protrusions 84a of the guide wire operation member 24 are disposed at a slight distance from the lid body 36 toward the distal end side.
  • the insertion body portion 90 is disposed in contact with or close to the rear wall 40 and is separated from the needle holding portion 34 by a predetermined distance.
  • a fixing convex portion 36a (see FIG. 4) on the lower surface of the lid body 36 is inserted into the communication space 34b on the upper surface and firmly fixed to the housing 14. .
  • the catheter hub 18 is mounted on the head 72 of the inner cylinder 60, and a pair of engagement arms 74 pressed by the distal end case portion 78 of the outer cylinder 62 locks the flange portion 48.
  • the protector 26 includes a first extending cylinder portion 76 of the inner cylinder 60, a second extending cylinder portion 80 of the outer cylinder 62, and first and second relay cylinders 64 and 66.
  • the second relay cylinder 66 has the needle holding portion 34 disposed in the slit 66 c, and the proximal end thereof extends to the vicinity of the front of the insertion body portion 90.
  • the guide wire 22 protrudes from the exposed port 94a of the insertion member 90 into the internal space 32a, extends in the distal direction toward the internal space 32a, and enters the fixed side passage 46 (first fixed side port 46a, fixed).
  • the side folded portion 46c and the second fixed side port 46b) are inserted.
  • the guide wire 22 protrudes from the second fixed side port 46b to the internal space 32a, extends in the proximal direction toward the internal space 32a, and moves to the movable side passage 92 (first movable side port 92a, movable side folded portion 92c, second movable portion).
  • Side port 92b Side port 92b
  • the guide wire 22 extends in the distal direction from the second movable side port 92b through the internal space 32a, and is inserted into the through hole 30 of the inner needle 12 through the insertion port 44a. It is arranged on the end side.
  • the user holds the housing 14 and punctures the inner needle 12 and the catheter 16 from the patient's body surface into the blood vessel. In this puncture state, the user advances the guide wire operating member 24 in the distal direction relative to the housing 14 in order to perform an operation of sending the guide wire 22 from the needle tip 12 a of the inner needle 12.
  • the insertion body portion 90 advances toward the needle holding portion 34 in the internal space 32a.
  • the guide wire 22 smoothly slides on the fixed side passage 46 and the movable side passage 92 and extends in the through hole 30 in the distal direction.
  • the fixed-side passage 46 in the vicinity of the first and second fixed-side ports 46a, 46b and the movable-side passage 92 in the vicinity of the first and second movable-side ports 92a, 92b extend linearly, so that the guide wire 22 The guide wire 22 can be moved while suppressing the load applied to the exposed portion of the internal space 32a.
  • the catheter assembly 10 causes the guide wire 22 to sufficiently protrude from the needle tip 12a.
  • the guide wire 22 is inserted into the through-hole 30 of the inner needle 12 from the held insertion body portion 90 until it is inserted into the fixed-side passage 46 of the needle holding portion 34. It passes through the movable side passage 92 of the insertion body 90. For this reason, the guide wire 22 passes through the internal space 32a between the needle holding portion 34 and the insertion body portion 90 three times (reciprocates 1.5), and the guide wire 22 is inserted from the needle tip 12a to the insertion body portion 90. It is possible to send out about three times the moving distance of.
  • the user holds the catheter operating member 20 and advances the catheter 16 and the catheter hub 18 relative to the housing 14 (the housing 14 is also retracted in the proximal direction). Included). As a result, the catheter 16 is smoothly inserted into the blood vessel along the guide wire 22. As the catheter hub 18 advances, the protector 26 extends in the axial direction.
  • the inner cylinder 60, the outer cylinder 62, the first relay cylinder 64, and the second relay cylinder 66 sequentially advance in the distal direction, and the inner needle 12 that has sent out the guide wire 22 is gathered together. Housed inside.
  • the guide wire 22 may be automatically accommodated in the inner needle 12 when the catheter hub 18 and the protector 26 are advanced.
  • the pair of engagement arms 74 are detached from the distal case 78 and the catheter hub 18 is disengaged. Make a withdrawal.
  • the engagement arm 74 moves upward in the cavity 68a and is locked at a position facing the needle tip 12a of the inner needle 12, thereby preventing the inner needle 12 from being exposed. .
  • the guide wire 22 reciprocates more than once between the fixed-side folded portion 46c of the fixed-side passage 46 and the movable-side folded portion 92c of the movable-side passage 92. is doing. That is, the guide wire 22 is inserted through the fixed-side passage 46 and the movable-side passage 92, so that three or more guide wires 22 pass between them. Accordingly, in the catheter assembly 10, when the distance between the fixed side passage 46 and the movable side passage 92 is reduced under the operation of the guide wire operation member 24 by the user, the guide wires 22 passing three times therebetween become shorter.
  • the guide wire 22 inserted into the through hole 30 of the inner needle 12 advances three times the operation distance X of the guide wire operating member 24 and is sent out from the needle tip 12a. Therefore, the catheter assembly 10 can increase the protruding amount of the guide wire 22 without increasing the size of the apparatus, and the user can better insert the catheter 16 into the living body.
  • the guide wire 22 since the proximal end portion of the guide wire 22 is fixedly held by the guide wire operating member 24, the relative movement of the guide wire 22 can be smoothly operated.
  • the guide wire 22 extends between the fixed side passage 46 and the movable side passage 92 an odd number of times, and the guide wire 22 can be sufficiently delivered from the needle tip 12a.
  • the guide wire 22 sends the guide wire 22 from the needle tip 12a by the movement of the guide wire operating member 24 in the distal direction, the user sends the guide wire 22 from the needle tip 12a while the inner needle 12 is punctured. Can be operated sensuously.
  • the catheter assembly 10 moves smoothly between the fixed side passage 46 and the movable side passage 92 because the guide wire 22 extends parallel to the direction of relative movement of the guide wire operating member 24.
  • the guide wire 22 is inserted from the first fixed side port 46a to the second fixed side port 46b, and from the first movable side port 92a to the second movable side port 92b, so that the fixed side and movable side passages are inserted.
  • the path including 46 and 92 can be smoothly slid.
  • the catheter assembly 10 can smoothly form the path of the guide wire 22 inside the housing 14 and the guide wire operating member 24, and can slide the guide wire 22 more smoothly.
  • the catheter assembly 10 is not limited to the above-described embodiment, and various application examples and modification examples can be taken.
  • the fixed-side and movable-side folded portions 46c and 92c are not only formed by the inner wall of the member, but also a pulley or the like for assisting the movement of the guide wire 22 is provided to the needle holding portion 34 and the insertion body portion 90. It may be provided.
  • the shapes and structures of the fixed side passage 46 and the movable side passage 92 may be appropriately designed so that the guide wire 22 can be moved well.
  • the guide wire 122 reciprocates 2.5 times between the needle holding portion 134 of the housing 114 and the insertion portion 190 of the guide wire operating member 124. In that it differs from the catheter assembly 10.
  • the insertion body portion 190 includes a first movable side passage 192, a second movable side passage 193, and a wire fixing portion 194.
  • the needle holding part 134 has an inner needle fixing part 144, a first fixed side path 146, and a second fixed side path 147.
  • the first movable-side passage 192 has a first movable-side port 192a provided near the corner on the lower side and the right side of the front end surface and a first side provided near the corner on the upper side and the right side of the front end surface. 2
  • the movable side port 192b is communicated.
  • the first movable-side passage 192 has a first movable-side folded portion 192c having a large circular arc on the base end side of the insertion body portion 190.
  • the second movable side passage 193 is formed in the same shape and position as the movable side passage 92 according to the first embodiment, and the third movable side port 193a and the fourth movable side port 193b of the tip surface 190a are connected to the second movable side. It communicates through the folded portion 193c.
  • the wire adhering portion 194 communicates with the exposed port 194a opened near the corner on the lower side and the left side of the distal end surface 190a in a front view of the insertion body portion 190, and extends linearly in the insertion body portion 190.
  • the insertion body 190 has a plurality of communication spaces 192d communicating with the first movable side passage 192.
  • the communication space 192d serves as a mold insertion portion when the guide wire operating member 124 is manufactured, and forms the first movable side passage 192 with less play.
  • the first fixed-side passage 146 of the needle holding portion 134 includes a first fixed-side port 146a provided near the corner on the lower side and the right side of the base end surface 134a as viewed in the direction of arrow A in FIG.
  • the second fixed side port 146b provided below the base end surface 134a and in the vicinity of the left corner is communicated.
  • the first fixed-side passage 146 has a first fixed-side folded portion 146c that is U-shaped in the planar direction on the distal end side of the needle holding portion 134.
  • the second fixed side passage 147 is formed in the same shape and position as the fixed side passage 46 according to the first embodiment, and connects the third fixed side port 147a and the fourth fixed side port 147b of the base end surface 134a to the second fixed side. It communicates through the side turn-up part 147c.
  • the catheter assembly 110 is basically configured as described above. With such a configuration, the guide wire 122 held by the wire fixing portion 194 extends from the exposed port 194a toward the distal end in the internal space 32a, and the first fixed side passage 146 (first fixed side port 146a). , First fixed side folded portion 146c, second fixed side port 146b). Next, the guide wire 122 extends from the second fixed side port 146b through the inner space 32a in the proximal direction, and enters the first movable side passage 192 (the first movable side port 192a, the first movable side folded portion 192c, the second 2 is inserted into the movable port 192b).
  • the guide wire 122 extends from the second movable side port 192b through the inner space 32a in the distal direction, and enters the second fixed side passage 147 (the third fixed side port 147a, the second fixed side folded portion 147c, the fourth It is inserted into the fixed side port 147b).
  • the guide wire 122 extends from the fourth fixed side port 147b through the inner space 32a in the proximal direction, and enters the second movable side passage 193 (the third movable side port 193a, the second movable side folded portion 193c, the second 4 is inserted into the movable side port 193b).
  • the guide wire 122 extends from the fourth movable port 193b in the inner space 32a toward the distal end, and is inserted into the through hole 30 of the inner needle 12 through the insertion port 144a.
  • the catheter assembly 110 allows the guide wire operating member 124 of the guide wire operating member 124 to pass through the internal space 32a between the needle holding portion 134 and the insertion body portion 190 by passing the guide wire 122 five times (reciprocating 2.5 times).
  • the guide wire 122 can be extended five times (5X) with respect to the operation distance X. Therefore, more guide wires 122 can be delivered from the needle tip 12a to guide the catheter 16 further into the blood vessel.
  • the shape and position of the movable side passage and the fixed side passage formed in the insertion body portion 190 and the needle holding portion 134 are not particularly limited, and can take various configurations.
  • the first fixed side passage 148 and the second fixed side passage 149 provided in the needle holding portion 134 are crossed, and the first and second fixed portions having large arc shapes up and down are formed. It is good also as a shape which has the side folding
  • the first fixed side passage 148 communicates the first fixed side port 148a on the lower side and the right side of the base end surface 134a with the second fixed side port 148b on the upper side and the left side of the base end surface 134a.
  • the second fixed side passage 149 communicates the third fixed side port 149a on the lower side and the left side of the base end surface 134a with the fourth fixed side port 149b on the upper side and the right side of the base end surface 134a.
  • first and second fixed-side passages 148 and 149 By forming the first and second fixed-side passages 148 and 149 in this way, the load (sliding resistance and the like) applied to the guide wire 122 by the first and second fixed-side folded portions 148c and 149c is reduced, and the guide The operation of the wire operation member 124 can be facilitated.
  • the guide wire 222 reciprocates twice between the needle holding portion 234 of the housing 214 and the insertion body portion 290 of the guide wire operating member 224. In that it differs from the catheter assemblies 10,110.
  • the catheter assembly 210 includes a wire fixing portion 294 that fixes and holds the proximal end portion of the guide wire 222 to the needle holding portion 234.
  • the wire fixing portion 294 communicates with the exposure port 294a formed on the lower side and the left side of the proximal end surface 234a of the needle holding portion 234 as seen in the direction of arrow A in FIG. It extends to.
  • the needle holding portion 234 has the inner needle fixing portion 44 and the fixed side passage 46 that are the same as the needle holding portion 34 of the first embodiment at the center portion and the upper side position.
  • the insertion body part 290 has the same first and second movable side passages 192 and 193 as the insertion body part 190 of the second embodiment.
  • the guide wire 222 held by the wire fixing portion 294 extends from the exposure port 294a toward the proximal direction in the internal space 32a, and the first movable side passage 192 (first The movable side port 192a, the first movable side folded portion 192c, and the second movable side port 192b) are inserted.
  • the guide wire 222 extends from the second movable side port 192b through the inner space 32a in the distal direction, and enters the fixed side passage 46 (first fixed side port 46a, fixed side folded portion 46c, second fixed side port 46b). ) Is inserted.
  • the guide wire 222 extends from the second fixed side port 46b through the inner space 32a in the proximal direction, and enters the second movable side passage 193 (the third movable side port 193a, the second movable side folded portion 193c, the second 4 is inserted into the movable side port 193b). Finally, the guide wire 222 extends from the fourth movable side port 193b in the distal direction in the internal space 32a and is inserted into the through hole 30 of the inner needle 12 through the insertion port 44a.
  • the guide wire 222 can be operated by moving the guide wire operating member 224 forward and backward.
  • the guide wire 222 is configured to pass through the internal space 32a between the fixed side passage 46 and the first and second movable side passages 192 and 193 (reciprocate twice), and with respect to the operation distance X of the guide wire operation member 224.
  • the guide wire 222 can be extended four times (4 ⁇ ).
  • the catheter assembly 310 As shown in FIG. 12, the catheter assembly 310 according to the fourth embodiment is configured such that the guide wire operating member 324 is retracted in the proximal direction and the guide wire 322 is delivered from the needle tip 12 a of the inner needle 12. Different from the assemblies 10, 110, 210.
  • the guide wire operation member 324 includes an operation plate portion 384 and a pair of extending portions 386 connected to the operation plate portion 384 as shown in FIG.
  • the operation plate portion 384 is disposed in proximity to the upper operation portion 56 provided in the catheter operation member 20 in an initial state.
  • the pair of extending portions 386 extend from both sides of the operation plate portion 384 toward the proximal direction to a midway position in the axial direction in the housing 314.
  • a first movable side passage 392 is provided in one of the pair of extending portions 386, and a second movable side passage 393 is provided in the other of the pair of extending portions 386. .
  • the first and second movable-side passages 392 and 393 are formed in a groove shape by cutting the inner surface of the extending portion 386.
  • the first movable side passage 392 has a first movable side port 392a below the proximal end of the extending portion 386, a second movable side port 392b above the proximal end, and the first and second movable sides.
  • a first movable side folded portion 392c is provided at a predetermined position extending linearly from the ports 392a and 392b.
  • the second movable side passage 393 has a third movable side port 393a above the proximal end of the extending portion 386, a fourth movable side port 393b below the proximal end, and the third and fourth movable sides.
  • a second movable-side folded portion 393c is provided at a predetermined position extending linearly from the ports 393a and 393b.
  • a pair of rails 333 that support the pair of extending portions 386 in the axial direction are provided on the inner upper side of the side wall 42 of the housing 314 (housing main body 332).
  • the rail 333 guides the extension portion 386 to advance and retreat, and covers the inner sides of the first and second movable side passages 392 and 393, thereby allowing the guide wire 22 from the first and second movable side passages 392 and 393 to move. Prevent omissions.
  • paths 392 and 393 are not limited to the said structure, and can take a various shape.
  • the first and second movable-side passages 392 and 393 may be formed in a groove shape in which the upper side and the lower side are opened in addition to the inside of the extending portion 386. Even if it forms in this way, the rail 333 and the cover 336 of the housing 314 can cover the insertion part of the guide wire 322, and the guide wire 322 can be prevented from being pulled out or twisted.
  • a needle holding portion 334 that holds the inner needle 12 is fixed to the proximal end portion of the housing main body 332.
  • the needle holding part 334 is formed in a block of a size that fills the internal space 32a of the housing main body 332, and has an inner needle fixing part 344 in the vertical and widthwise central part. Further, the needle holding part 334 has a guide wire 322 disposed above the inner needle fixing part 344.
  • a groove-shaped first fixed-side passage 346 is provided on the upper surface, and a second fixed-side passage 347 (the first fixed-side passage 347 is provided on the lower side and the left side of the first fixed-side passage 346. 3 fixed side port 347a) and a wire fixing portion 394 is provided on the right side of the same height as the third fixed side port 347a.
  • the first fixed-side passage 346 has first and second fixed-side ports 346a and 346b on the distal end surface 334a, and a first fixed-side folded portion 346c on the proximal end side.
  • the second fixed-side passage 347 is formed by inclining a second fixed-side folded portion 347b connected to the third fixed-side port 347a, and an end thereof reaches the side peripheral surface of the inner needle fixing portion 344.
  • the side hole 31 is provided in the outer peripheral surface of the inner needle 12, and the second fixed side passage 347 and the through hole 30 of the inner needle 12 communicate with each other through the side hole 31 in the fixed state.
  • the guide wire 322 held by the wire fixing portion 394 moves from the exposure port 394a toward the distal end in the internal space 32a. Then, it is inserted into the first movable side passage 392 (first movable side port 392a, first movable side folded portion 392c, second movable side port 392b). Next, the guide wire 322 moves from the second movable side port 392b toward the proximal direction in the inner space 32a, and enters the first fixed side passage 346 (first fixed side port 346a, first fixed side folded portion 346c, second fixed). Side port 346b).
  • the guide wire 322 moves from the second fixed side port 346b toward the distal direction in the internal space 32a, and enters the second movable side passage 393 (the third movable side port 393a, the second movable side folded portion 393c, the fourth movable side). Port 393b).
  • the guide wire 322 is inserted into the third fixed side port 347a of the second fixed side passage 347 from the fourth movable side port 393b toward the proximal direction in the internal space 32a, and further from the second fixed side folded portion 347b. It is inserted into the through hole 30 through the side hole 31 of the inner needle 12.
  • the catheter assembly 310 can send out the guide wire 322 from the needle tip 12a by retreating the guide wire operating member 324 as shown in FIG. Thereby, the user can send out the guide wire 322 largely by a simple operation in the vicinity of the distal end side holding the catheter assembly 310 with the inner needle 12 punctured. At this time, since the guide wire 322 passes through the internal space 32a four times, the guide wire 322 extends four times (4X) the operation distance X of the guide wire operation member 324.
  • the catheter assembly 410 As shown in FIG. 16, the catheter assembly 410 according to the fifth embodiment is configured such that the guide wire 422 is delivered by pressing the guide wire operation member 424, and the catheter assemblies 10, 110, and 210 are configured. , 310.
  • the guide wire operating member 424 is provided so as to protrude upward from the upper surface of the housing 414 near the tip of the housing 414, as shown in FIG.
  • the guide wire operating member 424 is formed in a thin box shape, and has a bending portion 424a for pressing operation on the upper side thereof. Further, as shown in FIG. 18A, an upper wide portion 424b wider than the lower side is formed below the bent portion 424a, and the upper wide portion 424b is an attachment hole provided in the lid 436 of the housing 414. 436a is configured to contact and fit. Further, the guide wire operating member 424 has a retaining protrusion 424 c that prevents the cover wire 436 from coming off from both sides of the lower end.
  • a movable side passage 492 is provided along the surface direction of the guide wire operating member 424.
  • This movable-side passage 492 is formed in a cavity that can be inserted and arranged in an M shape in a side view (see also FIG. 16) in cooperation with the housing 414, and in the vicinity of the bent portion 424a on the upper side in the cavity A pair of movable side folding portions 492c for folding the guide wire 422 are provided.
  • a slit 428 through which the fixed-side folded portion 446c of the lid body 436 passes when the guide wire operating member 424 is displaced downward is provided at an intermediate portion in the axial direction of the guide wire operating member 424.
  • the lid 436 is provided with a fixed-side folded portion 446c (protrusion) that folds the guide wire 422 in the intermediate portion in the axial direction of the mounting hole 436a. That is, the lid body 436 has a fixed-side passage 446 through which the guide wire 422 passes only slightly by the mounting hole 436a and the fixed-side folded portion 446c. As shown in FIG. 17, the bottom surface of the lid 436 has a U-shape in a plan view that covers the upper side of the insertion path of the guide wire 422 of the housing body 432 when the lid 436 is attached to the housing body 432. A closing projection 436b is provided.
  • the housing body 432 includes a rail 433 through which the guide wire 422 passes through the side wall 442, and one end of the guide wire 422 is fixedly held at the tip of the rail 433.
  • the rail 433 extends through the housing main body 432 in the proximal direction, and communicates with a pair of guide walls 439 standing upright from the lower wall 438 on the proximal end side.
  • the pair of guide walls 439 wrap around so as to draw a U-shape and slightly project in the distal direction, and the projecting ends are disposed to face the through hole 30 of the inner needle 12.
  • the guide wire 422 held by the rail 433 of the housing 414 is inserted into the movable side passage 492 of the guide wire operating member 424 as shown in FIG.
  • the guide wire 422 extends upward in the movable side passage 492 and is folded downward through one movable side folded portion 492c.
  • the guide wire 422 is inserted into the attachment hole 436a, extends again upward through the fixed side folded portion 446c, and extends downward through the other movable side folded portion 492c.
  • the guide wire 422 is inserted into the groove inside the rail 433 of the housing main body 432 through the mounting hole 436a, inserted between the pair of guide walls 439 through the rail 433, and folded back in the housing 414. It is inserted into the through hole 30 of the inner needle 12 on the side.
  • the guide wire 422 arranged in an M shape inside the fixed side passage 446 and the movable side passage 492 is flattened in the vertical direction and slides between the rail 433 and the pair of guide walls 439.
  • the guide wire 422 extends slightly less than 4 times (4X) the operation distance X of the guide wire operation member 424 and is sent out from the needle tip 12a.
  • the guide wire operating member 424 can maintain the delivery state of the guide wire 422 by fitting the upper wide portion 424b to the lid body 436 during the pressing operation.
  • the catheter assembly 410 may include a spring in the housing 414 that biases the guide wire operating member 424 upward.
  • the guide wire operating member 424 is lifted by the spring force only by raising the guide wire operating member 424 upward with a weak force, and the guide wire 422 is lifted from the needle tip 12a.
  • the portions of the guide wire 422 that are folded back by the folded portions 446c and 492c may be brazed in a state of being folded in advance. Thereby, the effect similar to installing a spring can be acquired.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Pulmonology (AREA)
  • Biophysics (AREA)
  • Vascular Medicine (AREA)
  • Media Introduction/Drainage Providing Device (AREA)

Abstract

Le boîtier (14) d'un ensemble cathéter (10) dispose en son sein d'un passage côté fixe (46) à travers lequel un fil-guide (22) est inséré et qui a une section de repliage côté fixe (46c) au niveau de laquelle le fil-guide (22) est replié. Un élément de commande du fil-guide (24) présente un passage intérieur côté mobile (92) à travers lequel le fil-guide (22) est introduit et qui a une section de repliage côté mobile (92c) au niveau de laquelle le fil-guide (22) est replié. Le fil-guide (22) est disposé de manière à passer trois fois ou plus à travers l'espace entre la section de repliage côté fixe (46c) et la section de repliage côté mobile (92c) et est inséré dans une aiguille interne (12).
PCT/JP2016/056355 2015-03-27 2016-03-02 Ensemble cathéter Ceased WO2016158171A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2015067258 2015-03-27
JP2015-067258 2015-03-27

Publications (1)

Publication Number Publication Date
WO2016158171A1 true WO2016158171A1 (fr) 2016-10-06

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Application Number Title Priority Date Filing Date
PCT/JP2016/056355 Ceased WO2016158171A1 (fr) 2015-03-27 2016-03-02 Ensemble cathéter

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024167678A3 (fr) * 2023-02-09 2024-10-24 Becton, Dickinson And Company Dispositif d'insertion de cathéter et procédé d'insertion d'un cathéter

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008148737A (ja) * 2006-12-14 2008-07-03 Nemoto Kyorindo:Kk カテーテル導入用具および薬液注入システム
JP2009500129A (ja) * 2005-07-06 2009-01-08 バスキュラー・パスウェイズ・インコーポレイテッド 静脈カテーテル挿入装置及びその利用方法
US20120089125A1 (en) * 2010-10-08 2012-04-12 Greatbatch Ltd. Bi-Directional Catheter Steering Handle

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009500129A (ja) * 2005-07-06 2009-01-08 バスキュラー・パスウェイズ・インコーポレイテッド 静脈カテーテル挿入装置及びその利用方法
JP2008148737A (ja) * 2006-12-14 2008-07-03 Nemoto Kyorindo:Kk カテーテル導入用具および薬液注入システム
US20120089125A1 (en) * 2010-10-08 2012-04-12 Greatbatch Ltd. Bi-Directional Catheter Steering Handle

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024167678A3 (fr) * 2023-02-09 2024-10-24 Becton, Dickinson And Company Dispositif d'insertion de cathéter et procédé d'insertion d'un cathéter

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