WO2023181870A1 - カテーテル組立体 - Google Patents
カテーテル組立体 Download PDFInfo
- Publication number
- WO2023181870A1 WO2023181870A1 PCT/JP2023/008209 JP2023008209W WO2023181870A1 WO 2023181870 A1 WO2023181870 A1 WO 2023181870A1 JP 2023008209 W JP2023008209 W JP 2023008209W WO 2023181870 A1 WO2023181870 A1 WO 2023181870A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- catheter
- fitting
- catheter assembly
- needle
- safety member
- 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
- 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
- A61M25/0606—"Over-the-needle" catheter assemblies, e.g. I.V. catheters
-
- 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
- A61M25/0612—Devices for protecting the needle; Devices to help insertion of the needle, e.g. wings or holders
- A61M25/0618—Devices for protecting the needle; Devices to help insertion of the needle, e.g. wings or holders having means for protecting only the distal tip of the needle, e.g. a needle guard
-
- 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
- A61M2205/00—General characteristics of the apparatus
- A61M2205/02—General characteristics of the apparatus characterised by a particular materials
- A61M2205/0216—Materials providing elastic properties, e.g. for facilitating deformation and avoid breaking
-
- 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
- A61M25/0097—Catheters; Hollow probes characterised by the hub
-
- 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
- A61M25/0113—Mechanical advancing means, e.g. catheter dispensers
-
- 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
- A61M25/0612—Devices for protecting the needle; Devices to help insertion of the needle, e.g. wings or holders
- A61M25/0618—Devices for protecting the needle; Devices to help insertion of the needle, e.g. wings or holders having means for protecting only the distal tip of the needle, e.g. a needle guard
- A61M25/0625—Devices for protecting the needle; Devices to help insertion of the needle, e.g. wings or holders having means for protecting only the distal tip of the needle, e.g. a needle guard with a permanent connection to the needle hub, e.g. a guiding rail, a locking mechanism or a guard advancement mechanism
Definitions
- the present invention relates to a catheter assembly.
- a catheter assembly including a catheter operating member for moving the catheter member in the distal direction with respect to the needle member, and a safety member for covering the needle tip.
- the safety member has a pair of arms separably connected to a valve mechanism inserted into the lumen of the catheter hub, and an outer cylinder that covers the pair of arms. In the initial state of the catheter assembly, the pair of arms are hooked to the valve mechanism, and the sheath covers the pair of arms to prevent them from opening outward. During use of the catheter assembly, the pair of arms are exposed from the barrel and open outwardly to disengage from the valve mechanism.
- the safety member is constructed by assembling a plurality of members in a complicated manner. Therefore, there is a problem that the size of the catheter assembly increases and the manufacturing cost tends to increase.
- the present invention aims to solve the above-mentioned problems.
- One aspect of the present invention provides a catheter member having a catheter and a catheter hub provided at a proximal end of the catheter, an inner needle inserted into a lumen of the catheter, and a catheter hub provided at a proximal end of the inner needle.
- a needle member having an inner needle hub; a catheter operating member provided on the catheter member; and a safety member provided movably with respect to the inner needle in an axial direction of the inner needle;
- the needle tip of the inner needle is exposed from the safety member in an initial state and is located in a distal direction than the safety member, and is covered by the safety member when the inner needle is removed from the catheter member.
- the catheter operating member has a connecting portion that connects the safety member in a separable manner and is formed to be elastically deformable, the connecting portion has a first regulating portion, and the safety member includes:
- the catheter operating member and the safety member include a second regulation part located in the distal direction from the first regulation part so as to face the first regulation part in the initial state, and the catheter operating member and the safety member When moved relative to the catheter operating member in the proximal direction, the connecting portion pressed by the second restricting portion is elastically deformed, and the second restricting portion moves the first restricting portion toward the proximal end.
- the catheter assemblies are separated from each other by stepping over in the direction.
- the first regulating portion of the catheter operating member controls the second regulating portion of the safety member in the distal direction. can be pressed.
- the safety member can be moved in the distal direction as the catheter operating member is operated.
- the first restricting portion is pressed toward the proximal end by the second restricting portion, thereby elastically deforming the connecting portion. be able to.
- the safety member can be separated from the catheter operation member by causing the second restriction portion to overcome the first restriction portion in the proximal direction. Therefore, the needle member can be removed from the catheter member while protecting the needle tip with the safety member.
- FIG. 1 is a perspective view of a catheter assembly according to one embodiment of the invention.
- FIG. 2 is an exploded perspective view of the catheter assembly of FIG. 1.
- 3 is an exploded perspective view of the assembly body of FIG. 2.
- FIG. 4 is a partially omitted perspective view of the assembly body of FIG. 2, viewed obliquely from below.
- 5 is a partially omitted bottom view of the assembly body of FIG. 2.
- FIG. FIG. 6 is a longitudinal cross-sectional view taken along line VI-VI in FIG. 7 is a cross-sectional view taken along line VII-VII in FIG. 6.
- FIG. 8 is a perspective view of the safety member shown in FIG. 3, viewed diagonally from below.
- FIG. 1 is a perspective view of a catheter assembly according to one embodiment of the invention.
- FIG. 2 is an exploded perspective view of the catheter assembly of FIG. 1.
- 3 is an exploded perspective view of the assembly body of FIG. 2.
- FIG. 4 is a partially omitted perspective view of
- FIG. 9 is an explanatory diagram of a method for assembling the safety member to the catheter operating member.
- FIG. 10 is a first explanatory view of the operating procedure of the catheter assembly of FIG. 1.
- FIG. 11 is a second explanatory diagram of the operating procedure of the catheter assembly of FIG. 1.
- FIG. 12 is a third explanatory view of the operating procedure of the catheter assembly of FIG. 1.
- FIG. 13 is a fourth explanatory diagram of the operating procedure of the catheter assembly of FIG. 1.
- FIG. 14 is a fifth explanatory view of the operating procedure of the catheter assembly of FIG. 1.
- FIG. 15 is a partially omitted vertical cross-sectional view of an assembly main body according to a modification.
- FIG. 16 is a cross-sectional view taken along line XVI-XVI in FIG. 15.
- a catheter assembly 10 is used when injecting fluid, blood transfusion, blood collection, etc. into a living body.
- the catheter 24 is inserted and left in the body to establish continuity between the body and the outside.
- Catheter assembly 10 allows insertion of catheters having a longer length than peripheral venous catheters (eg, central venous catheters, PICCs, midline catheters, etc.).
- the catheter assembly 10 may have a configuration in which a peripheral venous catheter can be inserted.
- the catheter assembly 10 is not limited to a venous catheter, but may be configured to allow insertion of an arterial catheter such as a peripheral artery catheter.
- the catheter assembly 10 extends in one direction (arrow X direction).
- the catheter assembly 10 has a tip at one end in the extending direction (in the direction of arrow Xa).
- the catheter assembly 10 has a proximal end at the other end in the extending direction (in the direction of arrow Xb).
- the direction of the arrow Xa may be referred to as the "distal direction” and the direction of the arrow Xb may be referred to as the "proximal direction.”
- the configuration of the catheter assembly 10 in its initial state will be described below.
- the catheter assembly 10 includes an assembly body 12 and a grip 14.
- Assembly body 12 includes a catheter member 16, a needle member 18, a catheter manipulation member 20, and a safety member 22.
- the catheter member 16 includes a catheter 24 and a catheter hub 26.
- Catheter 24 has flexibility.
- the catheter 24 has a lumen 28 large enough to accommodate the inner needle 32 of the needle member 18 and to allow liquid medicine, blood, etc. to flow therein.
- the distal end of the catheter 24 (the end in the direction of arrow Xa) is reduced in diameter to reduce puncture resistance.
- the overall length of the catheter 24 is not particularly limited, and can be designed as appropriate depending on the application, various conditions, etc., and is set, for example, to about 14 mm to 500 mm. Further, the total length of the catheter 24 may be set to about 30 mm to 400 mm. Furthermore, the total length of the catheter 24 may be set to about 76 mm to 200 mm.
- the proximal end (end in the direction of arrow Xb) of the catheter 24 is fixed to the catheter hub 26 by caulking, fusion, adhesion, or the like.
- the constituent material of the catheter 24 is not particularly limited, but a soft resin material is suitable.
- the constituent materials of the catheter 24 include, for example, fluororesins such as polytetrafluoroethylene (PTFE), ethylene-tetrafluoroethylene copolymer (ETFE), perfluoroalkoxyfluororesin (PFA), polyethylene, and polypropylene. and mixtures thereof, polyurethane, polyester, polyamide, polyether nylon resin, and mixtures of olefin resins and ethylene/vinyl acetate copolymers.
- catheter hub 26 has a lumen 30 that communicates with lumen 28 of catheter 24.
- catheter hub 26 has a cylindrical shape.
- the lumen 30 of the catheter hub 26 accommodates a hemostasis valve and plug (not shown).
- the constituent material of the catheter hub 26 is not particularly limited, but thermoplastic resin is suitable.
- examples of the constituent material of the catheter hub 26 include polypropylene, polycarbonate, polyamide, polysulfone, polyarylate, methacrylate-butylene-styrene copolymer, and the like.
- the needle member 18 includes an inner needle 32 and an inner needle hub 34.
- the inner needle 32 is a hollow needle that is rigid enough to puncture the skin 500 (see FIG. 10) of a living body.
- the total length of the inner needle 32 is longer than the total length of the catheter 24.
- the tip of the inner needle 32 has a sharp needle tip 36.
- Inner needle 32 is inserted into lumen 28 of catheter 24 .
- the distal end of the inner needle 32 is exposed through the distal opening 38 of the catheter 24 (see FIGS. 1 and 2).
- the inner needle 32 has a lumen 40 that extends along the axial direction of the inner needle 32.
- the lumen 40 communicates with a distal opening 42 of the inner needle 32 (see FIG. 3).
- the constituent material of the inner needle 32 include metal materials, hard resins, ceramics, and the like.
- the metal material include stainless steel, aluminum, titanium, and the like.
- the proximal end of the inner needle 32 is fixed to the inner needle hub 34 by fusion, adhesion, insert molding, or the like.
- the inner needle 32 may be a solid needle.
- the inner needle hub 34 extends along the axial direction of the inner needle 32.
- Inner needle hub 34 is constructed of, for example, the same material as catheter hub 26 described above.
- the inner needle hub 34 is fixed to the grip 14 (see FIG. 2).
- the catheter operating member 20 is operated by a user when moving the catheter member 16 along the inner needle 32.
- Catheter operation member 20 covers at least a portion of catheter 24 from above.
- the catheter operating member 20 is an integrally molded product made of a resin material.
- Catheter operation member 20 has flexibility. In other words, the catheter operating member 20 is elastically deformable.
- the catheter operating member 20 includes a catheter mounting section 44 and a connecting section 46.
- the catheter attachment part 44 is attachable to and detachable from the catheter member 16.
- the catheter mounting portion 44 extends along the axial direction of the catheter 24 (arrow X direction). The total length of the catheter mounting portion 44 is shorter than the total length of the catheter member 16 (see FIG. 2).
- the catheter attachment section 44 has an operation plate section 48, a cover section 50, a plurality of operation tabs 52, a first support section 54, and a second support section 56.
- the operation plate section 48 is located above the catheter 24.
- the operation plate section 48 has flexibility. In other words, the operation plate portion 48 is configured to be bendable in the thickness direction of the operation plate portion 48 .
- the width of the operation plate portion 48 is wider than the outer diameter of the catheter 24.
- the cover portion 50 extends from the base end of the operation plate portion 48 toward the base end direction (arrow Xb direction).
- the cover portion 50 is open downward.
- the tip of the cover portion 50 has a cross-sectional shape that resembles a U-shape upside down.
- a portion of the cover portion 50 from the intermediate portion to the base end in the extending direction has a cross-sectional shape resembling an L-shape upside down.
- the portion of the cover portion 50 from the middle portion to the base end portion has the notch portion 58 .
- the cover portion 50 covers only a portion of the catheter hub 26.
- the proximal end portion of the cover portion 50 is located in the proximal direction (in the direction of arrow Xb) from the proximal end of the catheter hub 26.
- the proximal end portion of the cover portion 50 has a wall portion 60 that covers the catheter hub 26 from the proximal direction.
- the plurality of operation tabs 52 protrude upward from the upper surface of the operation plate section 48.
- the plurality of operation tabs 52 are arranged at intervals along the direction in which the operation plate section 48 extends.
- the operation tab 52a located furthest in the direction of the arrow Xa protrudes higher than the other plurality of operation tabs 52.
- the first support portion 54 protrudes downward from the lower surface of the tip of the operation plate portion 48.
- the first support portion 54 extends along the direction in which the operation plate portion 48 extends.
- the first support portion 54 has a first support slit 62 that opens downward.
- the first support slit 62 extends along the direction in which the operation plate portion 48 extends (the direction of the arrow X).
- a longitudinally intermediate portion of the catheter 24 is removably fitted into the first support slit 62 .
- the longitudinal intermediate portion of the catheter 24 is removably inserted into the first support slit 62 . Note that a gap may exist between the longitudinally intermediate portion of the catheter 24 and the inner surface of the first support slit 62 in the inserted state.
- the second support part 56 is located at the tip of the cover part 50.
- the second support portion 56 has a second support slit 64 that opens downward.
- a proximal end portion of the catheter 24 is removably fitted into the second support slit 64 .
- the proximal end of the catheter 24 is removably inserted into the second support slit 64. Note that a gap may exist between the proximal end of the catheter 24 and the inner surface of the second support slit 64 in the inserted state.
- the connecting portion 46 extends from the proximal end (wall portion 60) of the catheter attachment portion 44 in the proximal direction.
- the safety member 22 is separably connected to the connection portion 46 .
- the connecting portion 46 is formed into a tubular shape.
- the connecting portion 46 is formed with a slit 66 extending along the axial direction of the connecting portion 46 (arrow X direction). That is, the connecting portion 46 has a C-shaped cross section (see FIG. 7).
- the slit 66 is provided on the lower surface of the connecting portion 46.
- the slit 66 extends linearly over the entire length of the connecting portion 46.
- the groove width of the slit 66 is larger than the outer diameter of the inner needle 32 and smaller than the outer diameter of a needle protection part 84 of the safety member 22, which will be described later.
- a recess 70 is formed in each of the pair of groove inner surfaces 68 forming the slit 66 .
- the pair of recesses 70 face each other with the slit 66 in between.
- the portion of the slit 66 sandwiched between the pair of recesses 70 and the pair of recesses 70 constitute a first fitting portion 72 for connecting the safety member 22.
- the first fitting portion 72 is a fitting hole 74 provided in the connecting portion 46 .
- the first fitting portion 72 is located in the middle of the connecting portion 46 in the axial direction. Specifically, the first fitting portion 72 is located further toward the distal end than the center of the connecting portion 46 in the axial direction.
- the recess 70 is formed into a trapezoidal shape when viewed from the bottom of the connecting portion 46.
- the length of the recess 70 along the direction of the arrow X becomes smaller toward the outside in the width direction of the slit 66.
- the recess 70 is surrounded by a first inclined inner surface 76, an intermediate inner surface 78, and a second inclined inner surface 80.
- Each of the first inclined inner surface 76, the intermediate inner surface 78, and the second inclined inner surface 80 is a flat surface.
- the first inclined inner surface 76 is connected to a portion of the groove inner surface 68 located further toward the distal end than the recessed portion 70 .
- the first inclined inner surface 76 is inclined outward in the width direction of the slit 66 toward the proximal end direction (arrow Xb direction) of the connecting portion 46 .
- the intermediate inner surface 78 is connected to the end of the first inclined inner surface 76 in the direction of arrow Xb.
- the intermediate inner surface 78 extends along the axial direction of the connecting portion 46 .
- the second inclined inner surface 80 is connected to the end of the intermediate inner surface 78 in the direction of arrow Xb.
- the second inclined inner surface 80 is inclined inward in the width direction of the slit 66 toward the proximal end direction (arrow Xb direction) of the connecting portion 46 .
- the second inclined inner surface 80 is connected to a portion of the groove inner surface 68 located closer to the proximal end than the recessed portion 70 .
- the second inclined inner surface 80 is a first restricting portion 82 for restricting movement of the safety member 22 in the proximal direction with respect to the connecting portion 46 .
- the safety member 22 includes a needle protection part 84, a second fitting part 86, a support plate part 88, and a stopper part 90.
- the needle protection part 84 is a tubular part extending along the arrow X direction. That is, the needle protector 84 has a lumen 92 through which the inner needle 32 is inserted. Lumen 92 extends the entire length of needle guard 84 .
- the needle protector 84 is inserted into the lumen 47 of the connecting portion 46 (see FIGS. 6 and 7). In the initial state of catheter assembly 10, the tip of needle guard 84 is located in lumen 30 of catheter hub 26 (see FIG. 6).
- the second fitting part 86 is a fitting convex part 94 that protrudes downward from the lower surface of the needle protection part 84.
- the second fitting portion 86 is located further toward the distal end than the longitudinal center of the needle protection portion 84 .
- the second fitting portion 86 (fitting convex portion 94) is fitted into the first fitting portion 72 (fitting hole 74) (see FIGS. 4 and 5).
- the second fitting part 86 has a shape corresponding to the first fitting part 72.
- the second fitting portion 86 is formed in a hexagonal shape when viewed from below.
- the outer peripheral surface of the second fitting portion 86 includes a pair of first inclined outer surfaces 96, a pair of intermediate outer surfaces 98, and a pair of second inclined outer surfaces 100.
- Each of the pair of first inclined outer surfaces 96, the pair of intermediate outer surfaces 98, and the pair of second inclined outer surfaces 100 is a flat surface.
- the first inclined outer surface 96 is inclined outward in the width direction (arrow Y direction) of the second fitting part 86 from the end of the second fitting part 86 in the arrow Xa direction toward the arrow Xb direction.
- the intermediate outer surface 98 is connected to the end of the first inclined outer surface 96 in the direction of arrow Xb. Intermediate outer surface 98 extends along the axis of needle protector 84 .
- the second inclined outer surface 100 is inclined inward in the width direction of the second fitting portion 86 from the base end of the intermediate outer surface 98 in the direction of arrow Xb.
- the first angled outer surface 96 is positioned opposite the first angled inner surface 76
- the intermediate outer surface 98 is positioned opposite the intermediate inner surface 78
- the second angled outer surface 100 is positioned opposite the first angled inner surface 76. It is located so as to face the inner surface 80.
- the second inclined outer surface 100 is a second regulating part 102 that can come into contact with the second inclined inner surface 80 (first regulating part 82) when the safety member 22 is connected to the catheter operating member 20.
- the second restriction part 102 is located further in the distal direction than the first restriction part 82.
- the support plate portion 88 extends from the proximal end of the needle protection portion 84 in the proximal direction (direction of arrow Xb).
- the stopper section 90 projects downward from the base end of the support plate section 88.
- the stopper portion 90 is located at the end of the support plate portion 88 in the arrow Y direction.
- the surface of the stopper portion 90 facing in the direction of arrow Xa has a portion that is inclined downward in the direction of arrow Xb.
- the grip 14 has a size and shape that makes it easy for the user to grip.
- the grip 14 extends in the arrow X direction.
- the grip 14 covers the proximal end of the assembly body 12.
- the grip 14 includes a lower cover part 104 and an upper cover part 106.
- An inner needle hub 34 is fixed to the lower cover part 104.
- a safety member 22 is provided on the lower cover portion 104 so as to be slidable in the arrow X direction.
- a movement limiting section 108 and a holding section 110 are provided at the tip of the lower cover section 104.
- the movement restriction portion 108 is a wall portion located toward the distal end of the stopper portion 90 of the safety member 22. When the stopper portion 90 contacts the movement restriction portion 108, movement of the safety member 22 in the distal direction with respect to the grip 14 is prevented.
- the holding part 110 is located apart from the movement restricting part 108 in the direction of arrow Xb. The holding portion 110 is configured such that the stopper portion 90 can be overcome in the distal direction, but cannot be overcome in the proximal direction. The holding portion 110 prevents the safety member 22 from moving in the proximal direction with respect to the grip 14.
- the upper cover portion 106 has an opening 112 that exposes the catheter operating member 20.
- the plurality of operation tabs 52 are exposed to the outside through the opening 112 of the upper cover portion 106.
- the grip 14 supports the operation plate portion 48 of the catheter operation member 20 so as to be slidable in the direction of arrow X.
- the distal end of the safety member 22 is inserted into the lumen 47 of the connecting portion 46 from the proximal direction of the catheter operating member 20.
- the groove inner surface 68 of the slit 66 is pressed outward in the width direction of the slit 66 by the second fitting part 86, the groove in the part of the slit 66 located in the direction of arrow Xb relative to the first fitting part 72 Width expands. Thereby, the second fitting part 86 can be pushed through the slit 66 to the first fitting part 72 (fitting hole 74).
- the tip of the catheter assembly 10 (inner needle 32 and catheter 24) is punctured into the skin 500.
- the needle tip 36 of the inner needle 32 is positioned within the blood vessel.
- connection part. 46 since the safety member 22 is movable in the distal direction with respect to the grip 14, a large force that causes the second fitting part 86 to come out of the first fitting part 72 in the proximal direction is applied to the connection part. 46. In other words, the connection between the catheter operating member 20 and the safety member 22 is maintained in a state where the second inclined outer surface 100 and the second inclined inner surface 80 are in contact with each other.
- the user moves the catheter operating member 20 and bends the operating plate portion 48 upward to remove the catheter 24 from the first support slit 62.
- the operation plate section 48 is positioned on the skin 500 in a curved state.
- the catheter operating member 20 separates from the grip 14. Therefore, the catheter 24 is left in the blood vessel and the catheter operating member 20 is removed from the grip 14.
- the user pulls back the grip 14 in the proximal direction (in the direction of arrow Xb) while holding the catheter operating member 20.
- the inner needle 32 moves in the proximal direction together with the grip 14 relative to the catheter member 16, so that the needle tip 36 is located in the lumen 92 of the needle protection portion 84 of the safety member 22 (see FIG. 11).
- the stopper part 90 of the safety member 22 crosses over the holding part 110 in the distal direction and contacts the movement limiting part 108, so that the safety member 22 moves in the direction of the arrow X with respect to the grip 14. Movement is prevented. This prevents the needle member 18 fixed to the grip 14 and the safety member 22 from moving relative to each other in the direction of the arrow X, so that the needle tip 36 is not exposed again from the needle protection portion 84 of the safety member 22. There isn't.
- the catheter operating member 20 is removed from the catheter member 16. Specifically, the catheter 24 is removed from the second support slit 64 by lifting the catheter manipulation member 20 upwardly relative to the catheter member 16 .
- This embodiment has the following effects.
- the safety member 22 when the catheter operating member 20 is moved in the distal direction to advance the catheter 24 with the inner needle 32 puncturing the living body, the safety member 22 is restricted by the first restricting portion 82 of the catheter operating member 20.
- the second restricting portion 102 can be pushed toward the distal end. Thereby, the safety member 22 can be moved in the distal direction as the catheter operating member 20 is operated.
- the first restriction part 82 is pressed in the proximal direction by the second restriction part 102, so that the connection is made.
- the portion 46 can be elastically deformed.
- the safety member 22 can be separated from the catheter operation member 20 by causing the second restriction part 102 to overcome the first restriction part 82 in the proximal direction. Therefore, the needle member 18 can be removed from the catheter member 16 while protecting the needle tip 36 with the safety member 22.
- the connecting portion 46 is formed into a tubular shape.
- a slit 66 is formed in the connecting portion 46 along the axial direction of the connecting portion 46 .
- the connecting portion 46 has a first fitting portion 72 .
- the safety member 22 includes a needle protection part 84 inserted into the inner cavity 47 of the connection part 46 in an initial state, and a second fitting part provided in the needle protection part 84 and fitted into the first fitting part 72 in an initial state. It has a section 86.
- the first regulating portion 82 is provided in the first fitting portion 72 .
- the second restricting portion 102 is provided in the second fitting portion 86 .
- the safety member 22 can be easily connected to the connecting portion 46 of the catheter operating member 20 by fitting the first fitting portion 72 and the second fitting portion 86 to each other.
- the first fitting part 72 is located in the middle of the connecting part 46 in the axial direction.
- the first fitting part 72 and the second fitting part 86 are disengaged (the second The first fitting part 72 can be brought into contact with the connecting part 46 from the time when the restricting part 102 crosses over the first restricting part 82 in the proximal direction until the first fitting part 72 completely comes out from the connecting part 46. can.
- the first fitting part 72 and the second fitting part 86 are disengaged, it is possible to suppress the safety member 22 from coming out of the catheter operation member 20 forcefully.
- the first fitting part 72 is located in the distal direction from the center of the connecting part 46 in the axial direction.
- the first fitting portion 72 is provided on the groove inner surface 68 that forms the slit 66.
- the first fitting portion 72 can be easily provided on the connecting portion 46. Moreover, it becomes easier to release the fitting between the first fitting part 72 and the second fitting part 86.
- the first fitting part 72 is a fitting hole 74.
- the second fitting portion 86 is a fitting convex portion 94 that can fit into the fitting hole 74 .
- the thickness of the needle protection part 84 does not become too thin.
- the assembly main body 12A has the structure of the first fitting part 130 and the second fitting part 132 as described above.
- the structure is different from that of
- the first fitting portion 130 is located in the distal direction from the center of the connecting portion 46 in the axial direction.
- the first fitting portion 130 is a fitting recess 134 provided on the inner surface forming the inner cavity 47 of the connecting portion 46 .
- the first fitting portion 130 extends along the circumferential direction of the connecting portion 46. Both ends of the first fitting portion 130 in the extending direction communicate with the slit 66 .
- the inner surface forming the fitting recess 134 has a first inclined inner surface 136, an intermediate inner surface 138, and a second inclined inner surface 140.
- the first inclined inner surface 136 is inclined radially outward of the connecting portion 46 toward the proximal end of the connecting portion 46 .
- the intermediate inner surface 138 is connected to the end of the first inclined inner surface 136 in the direction of arrow Xb.
- the intermediate inner surface 138 extends along the axial direction of the connecting portion 46 .
- the second inclined inner surface 140 is connected to the end of the intermediate inner surface 138 in the direction of arrow Xb.
- the second inclined inner surface 140 is inclined inward in the radial direction of the connecting portion 46 toward the proximal end of the connecting portion 46 .
- the second inclined inner surface 140 is a first regulating portion 142 for regulating the movement of the safety member 22 in the proximal direction with respect to the connecting portion 46 .
- the second fitting portion 132 is a fitting convex portion 144 that protrudes from the outer peripheral surface of the needle protection portion 84.
- the second fitting portion 132 extends annularly in the circumferential direction of the needle protection portion 84 .
- the second fitting part 132 is inserted into the fitting recess 134, which is the first fitting part 130, and the slit 66 in the initial state of the catheter assembly 10.
- the outer surface of the fitting protrusion 144 has a first inclined outer surface 146, an intermediate outer surface 148, and a second inclined outer surface 150.
- the first inclined outer surface 146 is inclined radially outward of the needle protection part 84 from the end of the second fitting part 132 in the direction of arrow Xa toward the direction of arrow Xb.
- the intermediate outer surface 148 is connected to the end of the first inclined outer surface 146 in the direction of arrow Xb. Intermediate outer surface 148 extends along the axis of needle protector 84 .
- the second inclined outer surface 150 is inclined inward in the radial direction of the connecting portion 46 from the base end of the intermediate outer surface 148 in the direction of arrow Xb.
- first angled outer surface 146 is positioned opposite first angled inner surface 136
- intermediate outer surface 148 is positioned opposite intermediate inner surface 138
- second angled outer surface 150 is positioned opposite intermediate angled inner surface 138. It is located so as to face the inner surface 140.
- the second inclined outer surface 150 is a second regulating part 152 that can come into contact with the second inclined inner surface 140 (first regulating part 142) when the safety member 22 is connected to the catheter operating member 20.
- the second restriction part 152 is located further in the distal direction than the first restriction part 142.
- the first fitting part 130 is provided on the inner surface forming the inner cavity 47 of the connecting part 46.
- the size of the first fitting part 130 (the first regulating part 142 and the second regulating part 152) can be easily changed. Therefore, it becomes easy to set the force required to separate the safety member 22 from the catheter operating member 20 to an appropriate magnitude.
- the second fitting part 132 extends annularly in the circumferential direction of the needle protection part 84.
- the force required for the second restricting portion 152 to overcome the first restricting portion 142 can be made relatively large.
- the first fitting portion may be a convex portion
- the second fitting portion may be a concave portion
- both the first fitting part and the second fitting part may be convex parts.
- the catheter assembly may include a blunt needle that extends through the lumen of the inner needle. In this case, since the tip of the blunt needle can be made to protrude beyond the tip of the inner needle before the inner needle is removed from the catheter member, it is possible to prevent the catheter from being damaged by the needle tip when the inner needle is removed. .
- This embodiment discloses the following contents.
- the above embodiment includes a catheter member (16) having a catheter (24) and a catheter hub (26) provided at the proximal end of the catheter, and an inner needle (24) inserted into the lumen (28) of the catheter. 32), an inner needle hub (34) provided at the proximal end of the inner needle, a catheter operating member (20) provided at the catheter member, and an axis of the inner needle. a safety member (22) provided movably with respect to the inner needle in the direction, and the needle tip (36) of the inner needle is exposed from the safety member in an initial state and is further than the safety member.
- a catheter assembly (10) located in a distal direction and covered by the safety member when the inner needle is removed from the catheter member, the catheter operating member separably connecting the safety member and It has a connecting part (46) formed to be elastically deformable, the connecting part has a first restricting part (82, 142), and the safety member faces the first restricting part in the initial state.
- a second regulating part (102, 152) located further in the distal direction than the first regulating part;
- the connecting portion may be formed in a tubular shape, and a slit (66) may be formed in the connecting portion along the axial direction of the connecting portion.
- the connecting part has a first fitting part (72, 130), and the safety member protects the needle inserted into the lumen (47) of the connecting part in the initial state. (84), and a second fitting part (86, 132) provided in the needle protection part and fitting into the first fitting part in the initial state, and the first regulating part has , the second restriction part may be provided in the second fitting part.
- the first fitting portion may be located in the middle of the connecting portion in the axial direction.
- the first fitting portion may be located further toward the distal end than the center of the connecting portion in the axial direction.
- the first fitting portion may be provided on the inner surface of the groove (68) forming the slit.
- the first fitting portion may be provided on an inner surface of the connecting portion that forms the lumen.
- the second fitting portion may extend in an annular shape in the circumferential direction of the needle protection portion.
- the first fitting part may be a recess or a hole
- the second fitting part may be a protrusion that can fit into the recess or the hole.
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Abstract
Description
次に、変形例に係る組立本体12Aについて説明する。本変形例において、上述した組立本体12と同一の構成については同一の参照符号を付し、詳細な説明を省略する。本変形例において、上述した組立本体12と同様の構成については同様の効果を奏する。
18…針部材 20…カテーテル操作部材
22…セーフティ部材 24…カテーテル
26…カテーテルハブ 32…内針
34…内針ハブ 36…針先
46…接続部 66…スリット
72、130…第1嵌合部 82、142…第1規制部
86、132…第2嵌合部 102、152…第2規制部
Claims (9)
- カテーテルと前記カテーテルの基端部に設けられたカテーテルハブとを有するカテーテル部材と、
前記カテーテルの内腔に挿通される内針と前記内針の基端部に設けられた内針ハブとを有する針部材と、
前記カテーテル部材に設けられたカテーテル操作部材と、
前記内針の軸線方向に当該内針に対して移動可能に設けられたセーフティ部材と、を備え、
前記内針の針先は、初期状態で前記セーフティ部材から露出するとともに当該セーフティ部材よりも先端方向に位置し、前記内針を前記カテーテル部材から抜去した状態で前記セーフティ部材に覆われるカテーテル組立体であって、
前記カテーテル操作部材は、前記セーフティ部材を分離可能に接続するとともに弾性変形可能に形成された接続部を有し、
前記接続部は、第1規制部を有し、
前記セーフティ部材は、前記初期状態で前記第1規制部と向かい合うように前記第1規制部よりも前記先端方向に位置する第2規制部を有し、
前記カテーテル操作部材と前記セーフティ部材とは、前記セーフティ部材を前記カテーテル操作部材に対して基端方向に相対的に移動させた時に、前記第2規制部によって押圧された前記接続部が弾性変形するとともに前記第2規制部が前記第1規制部を前記基端方向に乗り越えることにより互いに分離される、カテーテル組立体。 - 請求項1記載のカテーテル組立体であって、
前記接続部は、管状に形成され、
前記接続部には、当該接続部の軸線方向に沿ってスリットが形成されている、カテーテル組立体。 - 請求項2記載のカテーテル組立体であって、
前記接続部は、第1嵌合部を有し、
前記セーフティ部材は、
前記初期状態で前記接続部の内腔に挿入された針保護部と、
前記針保護部に設けられて前記初期状態で前記第1嵌合部に嵌合する第2嵌合部と、を有し、
前記第1規制部は、前記第1嵌合部に設けられ、
前記第2規制部は、前記第2嵌合部に設けられている、カテーテル組立体。 - 請求項3記載のカテーテル組立体であって、
前記第1嵌合部は、前記接続部の前記軸線方向の中間に位置する、カテーテル組立体。 - 請求項4記載のカテーテル組立体であって、
前記第1嵌合部は、前記接続部の前記軸線方向の中央よりも前記先端方向に位置する、カテーテル組立体。 - 請求項3~5のいずれか1項に記載のカテーテル組立体であって、
前記第1嵌合部は、前記スリットを形成する溝内面に設けられている、カテーテル組立体。 - 請求項3~5のいずれか1項に記載のカテーテル組立体であって、
前記第1嵌合部は、前記接続部の前記内腔を形成する内面に設けられている、カテーテル組立体。 - 請求項3~7のいずれか1項に記載のカテーテル組立体であって、
前記第2嵌合部は、前記針保護部の周方向に環状に延在している、カテーテル組立体。 - 請求項3~8のいずれか1項に記載のカテーテル組立体であって、
前記第1嵌合部は、凹部又は孔であり、
前記第2嵌合部は、前記凹部又は前記孔に嵌合可能な凸部である、カテーテル組立体。
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2024509929A JPWO2023181870A1 (ja) | 2022-03-22 | 2023-03-06 | |
| EP23774469.3A EP4487895A4 (en) | 2022-03-22 | 2023-03-06 | CATHETER ASSEMBLY |
| CN202380013932.7A CN118076405A (zh) | 2022-03-22 | 2023-03-06 | 导管组装体 |
| US18/890,386 US20250010041A1 (en) | 2022-03-22 | 2024-09-19 | Catheter assembly |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2022-044898 | 2022-03-22 | ||
| JP2022044898 | 2022-03-22 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US18/890,386 Continuation US20250010041A1 (en) | 2022-03-22 | 2024-09-19 | Catheter assembly |
Publications (1)
| Publication Number | Publication Date |
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| WO2023181870A1 true WO2023181870A1 (ja) | 2023-09-28 |
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| PCT/JP2023/008209 Ceased WO2023181870A1 (ja) | 2022-03-22 | 2023-03-06 | カテーテル組立体 |
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|---|---|
| US (1) | US20250010041A1 (ja) |
| EP (1) | EP4487895A4 (ja) |
| JP (1) | JPWO2023181870A1 (ja) |
| CN (1) | CN118076405A (ja) |
| WO (1) | WO2023181870A1 (ja) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013529111A (ja) * | 2010-05-14 | 2013-07-18 | シー・アール・バード・インコーポレーテッド | カテーテル配置装置および方法 |
| WO2018038029A1 (ja) | 2016-08-25 | 2018-03-01 | テルモ株式会社 | カテーテル組立体 |
| WO2021166961A1 (ja) * | 2020-02-20 | 2021-08-26 | テルモ株式会社 | カテーテル組立体 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7798994B2 (en) * | 2005-11-15 | 2010-09-21 | Becton, Dickinson And Company | Needle shield to septum interconnect |
| CN203694357U (zh) * | 2013-03-15 | 2014-07-09 | B.布劳恩梅尔松根股份公司 | 安全iv导管 |
| JP6718604B2 (ja) * | 2015-02-17 | 2020-07-08 | ニプロ株式会社 | 留置針組立体 |
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2023
- 2023-03-06 WO PCT/JP2023/008209 patent/WO2023181870A1/ja not_active Ceased
- 2023-03-06 CN CN202380013932.7A patent/CN118076405A/zh active Pending
- 2023-03-06 EP EP23774469.3A patent/EP4487895A4/en active Pending
- 2023-03-06 JP JP2024509929A patent/JPWO2023181870A1/ja active Pending
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2024
- 2024-09-19 US US18/890,386 patent/US20250010041A1/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013529111A (ja) * | 2010-05-14 | 2013-07-18 | シー・アール・バード・インコーポレーテッド | カテーテル配置装置および方法 |
| WO2018038029A1 (ja) | 2016-08-25 | 2018-03-01 | テルモ株式会社 | カテーテル組立体 |
| WO2021166961A1 (ja) * | 2020-02-20 | 2021-08-26 | テルモ株式会社 | カテーテル組立体 |
Non-Patent Citations (1)
| Title |
|---|
| See also references of EP4487895A4 |
Also Published As
| Publication number | Publication date |
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| JPWO2023181870A1 (ja) | 2023-09-28 |
| CN118076405A (zh) | 2024-05-24 |
| EP4487895A4 (en) | 2025-07-09 |
| EP4487895A1 (en) | 2025-01-08 |
| US20250010041A1 (en) | 2025-01-09 |
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