WO2003074103A2 - プレフィルドシリンジ - Google Patents
プレフィルドシリンジ Download PDFInfo
- Publication number
- WO2003074103A2 WO2003074103A2 PCT/JP2002/013690 JP0213690W WO03074103A2 WO 2003074103 A2 WO2003074103 A2 WO 2003074103A2 JP 0213690 W JP0213690 W JP 0213690W WO 03074103 A2 WO03074103 A2 WO 03074103A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- gasket
- space
- cylinder
- inner cylinder
- syringe
- Prior art date
Links
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
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
- A61M5/31596—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms comprising means for injection of two or more media, e.g. by mixing
-
- 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
- A61M5/178—Syringes
- A61M5/24—Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or carpules, e.g. automatic
- A61M5/2455—Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or carpules, e.g. automatic with sealing means to be broken or opened
- A61M5/2459—Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or carpules, e.g. automatic with sealing means to be broken or opened upon internal pressure increase, e.g. pierced or burst
- A61M2005/2462—Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or carpules, e.g. automatic with sealing means to be broken or opened upon internal pressure increase, e.g. pierced or burst by displacing occluding plugs
-
- 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
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
- A61M5/31596—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms comprising means for injection of two or more media, e.g. by mixing
- A61M2005/31598—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms comprising means for injection of two or more media, e.g. by mixing having multiple telescopically sliding coaxial pistons encompassing volumes for components to be mixed
-
- 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
- A61M5/178—Syringes
- A61M5/24—Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or carpules, e.g. automatic
- A61M5/2455—Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or carpules, e.g. automatic with sealing means to be broken or opened
- A61M5/2459—Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or carpules, e.g. automatic with sealing means to be broken or opened upon internal pressure increase, e.g. pierced or burst
-
- 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
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
- A61M5/31511—Piston or piston-rod constructions, e.g. connection of piston with piston-rod
- A61M5/31513—Piston constructions to improve sealing or sliding
Definitions
- the present invention relates to a syringe and a gasket.
- Two-chamber type An outer cylinder, a first gasket slidable in the outer cylinder, an inner cylinder mounted on a proximal end side of the first gasket, and a sliding member in the inner cylinder.
- a second gasket that can move; and a plunger that moves the second gasket.
- the medicine is stored in a first space surrounded by the outer cylinder and the first gasket. The second space surrounded by the gasket and the liquid are stored.
- the two-chamber type To use the liquid, push the liquid into the inner cylinder and move the second gasket to the distal end of the inner cylinder to move the liquid from the second space to the first space. Let it flow in. The drug is mixed and dissolved in the inflowing liquid to form a solution. Then, the solution is delivered (discharged) by pushing the inner cylinder into the outer cylinder and moving the first gasket toward the distal end of the outer cylinder.
- Such a two-chamber type Before use, the outer cylinder The inner cylinder protrudes from the end, and the plunger protrudes greatly from the base end of the inner cylinder. For this reason, there is a problem that a large space is required for transportation and storage.
- An object of the present invention is to provide a two-chamber prefilled syringe that is advantageous for miniaturization.
- Another object of the present invention is to provide a gasket that can reliably prevent return to the proximal direction necessary for properly operating the two-chamber prefilled syringe advantageous for miniaturization. is there. Disclosure of the invention
- a first gasket slidable in the outer cylinder
- An inner cylinder mounted on the proximal end side of the first gasket
- a second gasket slidable in the inner cylinder
- An opening / closing mechanism that can be switched from a closed state in which the first space and the second space are liquid-tightly separated to an open state in which the first space and the second space communicate with each other;
- the second A return preventing means for preventing a gasket from returning in a proximal direction relative to the inner cylinder.
- L1 / L2 is 0.1 or less.
- the opening / closing mechanism section connects the first space and the second space.
- a stopper movably installed in the communication passage, wherein the stopper blocks the communication passage when the stopper is at the first portion of the communication passage.
- a gap is formed between the inner peripheral surface of the communication passage and the outer peripheral surface of the plug, and the plug is opened.
- a groove or a ridge is formed on the inner peripheral surface of the second portion of the communication path, and when the plug is at the second portion, the outer peripheral surface of the plug and the groove are formed.
- a stimulating member capable of stimulating the partition portion wherein the stimulating member changes from a closed state to an open state by stimulating the partition portion.
- the second gasket protrudes toward the outer circumference over the entire circumference.
- a gasket characterized in that the sliding resistance when moving in the proximal direction relative to the cylinder is greater than the sliding resistance when moving in the distal direction.
- FIG. 1 is a longitudinal sectional view (when an opening / closing mechanism is in a closed state) showing a first embodiment of a syringe of the present invention.
- FIG. 2 is a longitudinal sectional view (when the opening / closing mechanism is in an open state) showing the first embodiment of the syringe of the present invention.
- FIG. 3 is a cross-sectional view of the opening / closing mechanism taken along line XX in FIG.
- FIG. 4 is a longitudinal sectional view of a second gasket (the gasket of the present invention) in the syringe shown in FIGS. 1 and 2.
- FIG. 5 is a longitudinal sectional view showing a state in which the second gasket in the syringe shown in FIGS. 1 and 2 moves toward the distal end with respect to the inner cylinder.
- FIG. 6 is a longitudinal sectional view showing a state in which the second gasket of the syringe shown in FIGS. 1 and 2 moves in the proximal direction with respect to the inner cylinder.
- FIG. 7 is a longitudinal sectional view showing a state in which the liquid has moved from the second space to the first space in the syringe shown in FIGS. 1 and 2.
- FIG. 8 is a vertical cross-sectional view (when the opening / closing mechanism is in a closed state) showing the opening / closing mechanism in the second embodiment of the syringe of the present invention.
- FIG. 9 is a vertical cross-sectional view (when the opening / closing mechanism is in an open state) showing the opening / closing mechanism in a second embodiment of the syringe of the present invention.
- FIG. 1 and 2 are respectively a longitudinal sectional view showing a first embodiment of a syringe of the present invention
- FIG. 3 is a transverse sectional view of an opening / closing mechanism section taken along line X--X in FIG.
- FIG. 4 is a longitudinal sectional view of the second gasket in the syringe shown in FIGS. 1 and 2
- FIG. 5 is a view in which the second gasket in the syringe shown in FIGS. 1 and 2 is opposed to the inner cylinder.
- FIG. 6 is a longitudinal sectional view showing a state in which the second gasket of the syringe shown in FIGS. 1 and 2 moves in a proximal direction with respect to the inner cylinder.
- FIG. 7 is a longitudinal sectional view showing a state in which the liquid has moved from the second space to the first space in the syringe shown in FIGS. 1 and 2.
- 1 shows a state in which the opening / closing mechanism of the syringe is in a closed state
- FIG. 2 shows a state in which the opening / closing mechanism of the syringe is in an open state.
- the left side (liquid sending side) and the right side (pressing side) in FIGS. 1, 2 and 4 to 7 are referred to as "proximal ends”.
- 1 and 2 is a two-chamber prefilled syringe in which a drug and a liquid for dissolving the drug are separately stored in two chambers inside the syringe.
- a first gasket 3 slidable in the outer cylinder 2
- an inner cylinder 4 mounted on the proximal end side of the first gasket 3
- a second gasket 5 slidable in the inner cylinder 4
- a plunger (push) 6 for moving and operating the second gasket 5 and an opening and closing mechanism 7A are provided.
- the outer cylinder 2 is composed of a bottomed cylindrical member having a bottom 21 on the distal end side, and a reduced diameter portion 22 reduced in diameter from the body of the outer cylinder 2 is provided at the center of the bottom 21. It is formed physically. For example, a hub, a connector, a tube, and the like (not shown) of a needle tube are fitted and attached to the reduced diameter portion 22.
- a cap 24 is attached as a sealing member to the distal end of the reduced diameter portion 22 by, for example, screwing, and hermetically seals the lumen 23 of the reduced diameter portion 22.
- the method of sealing the reduced diameter portion 22 is not limited to the method using the cap 24, and may be sealed by, for example, a flexible plug, affixing a film, or the like (not shown).
- a plate-like flange 25 is formed on the outer periphery of the proximal end of the outer cylinder 2 so as to be integral. I have. When moving the inner cylinder 4 relative to the outer cylinder 2, the operation can be performed by putting a finger on the flange 25.
- Examples of the constituent material of the outer cylinder 2 include polyvinyl chloride, polyethylene, polypropylene, cyclic polyolefin, polystyrene, poly (4-methylpentene-11), polycarbonate, acrylic resin, and acrylic nitrile-butadiene styrene.
- Various resins such as polymers, polyesters such as polyethylene terephthalate and polyethylene naphthalate, butadiene-styrene copolymers, and polyamides (eg, nylon 6, nylon 6.6, nylon 6.10, nylon 12) Among them, resins such as polypropylene, cyclic polyolefin, polyester, and poly (4-methylpentene-11) are preferable in that molding is easy.
- the constituent material of the outer cylinder 2 is substantially transparent in order to secure the visibility of the inside.
- a first gasket 3 made of a flexible material is inserted into the outer cylinder 2.
- a plurality of ring-shaped convex portions 31 and 32 projecting toward the outer peripheral side are formed over the entire circumference. Since the convex portions 31 and 32 slide while being in close contact with the inner peripheral surface 26 of the outer cylinder 2, the liquid tightness is more reliably maintained and the mobility is improved.
- two projections 31 and 32 are formed along the axial direction of the first gasket 3. That is, the protrusions 31 and 32 are formed at the base end and the front end of the first gasket 3, respectively.
- the tip side of the projection 32 has a tapered surface whose outer diameter gradually decreases toward the tip.
- the formation position, the number, the cross-sectional shape, and the like of the convex portions 31 and 32 are not limited thereto.
- the first gasket 3 is formed with a through hole 33 penetrating the center from the base end to the front end.
- the reduced diameter portion 42 of the inner cylinder 4 described below is inserted into the through hole 33.
- a ring-shaped concave portion 34 is formed over the entire circumference.
- the constituent material of the first gasket 3 is not particularly limited.
- various rubber materials such as natural rubber, butyl rubber, isoprene rubber, butadiene rubber, styrene-butane rubber, silicone rubber, polyurethane, polyester And various kinds of thermoplastic elastomers such as polyamide-based, olefin-based, and styrene-based elastomers, or elastic materials such as mixtures thereof.
- the first gasket 3 only needs to have at least the outer peripheral portion made of the above-described flexible material.
- the first gasket 3 has a core (not shown) made of a resin material. May be configured such that an elastic material is disposed so as to cover the outer periphery of.
- the first gasket 3 may have a coating layer of a resin material formed on an outer surface thereof.
- the drug 100 may be in any form such as a solid (including a powder and a granule) and a liquid. However, in the present embodiment, a solid (powder) drug will be described as a representative. .
- This drug 100 is to be blended and dissolved in a liquid 200 described later.
- anticancer drugs antibiotics, vitamins (multivitamin drugs), various amino acids, Phosphorus and other antithrombotic agents, insulin, antitumor agents, analgesics, cardiotonic agents, intravenous anesthetics, antiparkinson agents, ulcer treatments, corticosteroids, arrhythmias, correction electrolytes, antivirals, immunostimulants And the like.
- the inner cylinder 4 has both a function as a plunger (presser) for moving and operating the first gasket 3 and a function as a container for storing the liquid 200.
- the inner cylinder 4 is formed of a bottomed cylindrical member having a bottom portion 41 on the distal end side, and a reduced diameter portion 42 reduced in diameter from the body of the inner cylinder 4 is provided at the center of the bottom portion 41. It is formed physically.
- the inner cylinder 4 is attached to the first gasket 3 in a state where the reduced diameter portion 42 penetrates 3 and is inserted into 33.
- a ring-shaped convex portion (flange) 43 is formed on the outer periphery of the reduced-diameter portion 42 over the entire circumference. When the convex portion 43 is inserted into the concave portion 34, the first The gasket 3 and the inner cylinder 4 are securely and hermetically fixed.
- a flange 44 is integrally formed on the outer periphery of the base end of the inner cylinder 4.
- the constituent material of the inner cylinder 4 is not particularly limited, and the same materials as those described as the constituent materials of the outer cylinder 2 can be used.
- the constituent material of the inner cylinder 4 is substantially transparent in order to secure the visibility inside.
- a second gasket 5 (gasket of the present invention) is inserted inside the inner cylinder 4.
- a liquid 200 is stored in a second space 46 surrounded by the inner cylinder 4 and the second gasket 5 in a liquid-tight manner.
- the liquid 200 is not particularly limited.
- a plurality of ring-shaped convex portions 51 and 52 projecting toward the outer peripheral side are formed over the entire circumference. Since the convex portions 51 and 52 slide while being in close contact with the inner peripheral surface 45 of the inner cylinder 4, the liquid tightness is more reliably maintained and the slidability is improved.
- two convex portions 51 and 52 are formed along the axial direction of the second gasket 5. That is, the convex portions 51 and 52 are formed at the base end and the distal end of the second gasket 5, respectively. Of these, the distal end side of the convex portion 52 has a tapered surface whose outer diameter gradually decreases toward the distal end.
- the second gasket 5 has a hollow portion 53 that is open at the base end surface.
- the distal end of the hollow portion 53 has an enlarged diameter, and a head portion 61 of a plunger 6 described later is inserted (fitted) into the enlarged diameter portion.
- Such a second gasket 5 has a configuration in which the outer surface of a gasket main body 54 is covered with a coating layer 55.
- the gasket body 54 is made of an elastic material having a relatively high coefficient of friction.
- an elastic material is not particularly limited, but includes, for example, various rubber materials such as natural rubber, butyl rubber, isoprene rubber, butadiene rubber, styrene butadiene rubber, silicone rubber, polyurethane, polyester, One or a combination of two or more of various thermoplastic elastomers such as polyamide, olefin and styrene can be used.
- the gasket main body 54 may have at least an outer peripheral portion made of the above-described elastic material.
- the gasket main body 54 has a core (not shown) made of a resin material.
- a configuration in which an elastic material is disposed so as to cover the outer periphery may be used.
- the outer peripheral surface and the distal end surface of such a gasket main body 54 are covered with a coating layer 55 made of a material having a smaller coefficient of friction than the constituent material of the gasket main body 54.
- the constituent material of the coating layer 55 is not particularly limited.
- polytetrafluoroethylene or a copolymer thereof, ethylene-tetrafluoroethylene copolymer, tetrafluoroethylene, tetrafluoroethylene-perfluoroalkoxy may be used.
- Ethylene copolymer for example, copolymer of styrene tetrafluoride and perfluoroalkoxyethylene having 1 to 5 carbon atoms in the alkoxyl group
- PVdE polyvinylidene fluoride
- PCTFE It is preferably a fluororesin such as polyfluoroethylene (trifluoroethylene), TFE (tetrafluoroethylene), and FEP (fluorinated ethylene propylene), and one or more of these can be used in combination.
- a fluororesin has a particularly low coefficient of friction, so that the sliding resistance of the second gasket 5 in the tip direction can be further reduced.
- the coating layer 55 is missing in a portion from the vicinity of the peak of the projection 51 to the base end side. That is, the constituent material of the gasket main body 54 is exposed at the defective portion 56 where the coating layer 55 is lost in the convex portion 51. Therefore, the defective portion (exposed portion) 56 is a large friction portion having a larger coefficient of friction than the portion of the projection 51 covered with the coating layer 55.
- the large frictional portion such as the defective portion 56 It constitutes return prevention means for preventing the gasket 5 from moving (returning) in the proximal direction relative to the inner cylinder 4.
- the sliding resistance of the second gasket 5 when moving in the proximal direction is larger than the sliding resistance when moving in the distal direction relative to the inner cylinder 4. Due to this difference in the sliding resistance, the second gasket 5 moves easily in the distal direction relative to the inner cylinder 4, but it is difficult to move in the proximal direction relative to the inner cylinder 4. Thus, the inner cylinder 4 is prevented from returning in the proximal direction.
- the return prevention means of the second gasket 5 is provided in the second gasket 5 itself, so that, for example, the plunger 6 and the inner cylinder 4 are locked as the return prevention means.
- a separate member such as a hook mechanism
- the defective portion 56 shown in the figure is formed by cutting the outer peripheral portion of the base end of the second gasket 5 (C-plane cut). Thus, it can be easily formed.
- the boundary portion 57 between the coating layer 55 and the defective portion 56 is located near the peak of the convex portion 51 in the natural state (in a state where no external force is applied) shown in FIG. More preferably, it is located on the tip side.
- the boundary portion 57 slightly moves to the base end side due to the deformation of the convex portion 51, so that the inner peripheral surface 45 does not come into contact with the defective portion 56 and the coating layer
- the deformation of the protruding portion 51 causes the boundary portion 57 to move slightly toward the distal end, so that the defective portion 56 is surely brought into contact with the inner peripheral surface. 4 Touch 5 Therefore, the anti-return effect can be more reliably exerted while keeping the sliding resistance in the tip direction (particularly the sliding resistance at the time of starting movement) small.
- the defective portion 56 is preferably formed substantially linearly in the vertical cross-sectional shape in the natural state shown in FIG. Thereby, the contact area of the defective portion 56 with the inner peripheral surface 45 in the state shown in FIG. 6 is increased, and return to the proximal direction can be more reliably prevented.
- the inclination angle 0 of the cutout portion 56 with respect to the axial direction of the second gasket 5 is not particularly limited in the vertical cross-sectional shape shown in FIG. Is preferably about 5 to 60 °, and 10 to 40 °. More preferably, it is in the order of magnitude.
- the defective portion 56 does not make more reliable contact with the inner peripheral surface 45 in the state shown in FIG. 5, but makes more reliable contact with the inner peripheral surface 45 in the state shown in FIG.
- the defect portion 56 may be formed in a curved shape (curved surface).
- the radius of curvature is preferably 10 mm or more, and more preferably 15 mm or more. More preferably, there is.
- the coefficient of kinetic friction (with respect to the sapphire needle) of the portion of the projection 51 covered with the coating layer 55 is preferably 0.4 or less, and more preferably about 0.1 to 0.3. Thereby, the sliding resistance in the tip direction of the second gasket 5 can be further reduced.
- the coefficient of kinetic friction (with respect to the sapphire needle) of the defective portion 56 in the convex portion 51 is preferably 0.8 or more, and more preferably about 0.9 to 1.2. This makes it possible to more reliably prevent the second gasket 5 from returning in the proximal direction.
- the average thickness of the coating layer 55 is not particularly limited, but is preferably, for example, about 1 to 200 m, and more preferably about 15 to 110 m. If the average thickness of the coating layer 55 is less than the lower limit, the strength may be insufficient. On the other hand, when the average thickness of the coating layer 55 exceeds the upper limit, depending on the constituent material, the ability of the coating layer 55 to follow the gasket body 54 when the second gasket 5 is deformed is reduced. However, the liquid tightness may decrease.
- the formation position, the number, the cross-sectional shape, and the like of the protrusions 51 and 52 are not limited thereto.
- a large friction portion such as the defective portion 56 may be provided in the convex portion 52.
- a plurality of defective portions 56 may be provided, for example, both of the convex portions 51 and 52 may be provided.
- the large friction portion of the second gasket 5 It is not limited to the one constituted by the lack of the coating layer 55.
- the gasket body may be made of a material having a relatively low friction coefficient, and the portion including the portion corresponding to the large friction portion may be made of an elastic material having a relatively high friction coefficient.
- the gasket of the present invention such as the second gasket 5 is not limited to the two-chamber prefilled syringe such as the syringe 1 of the present embodiment, but may be other various types such as a syringe which needs to prevent a suction operation. Can be applied to syringes.
- the means for preventing the second gasket 5 from returning is not limited to the large friction portion such as the defective portion 56, and may be any type. Further, the return preventing means of the second gasket 5 may be provided at a portion other than the second gasket 5, for example, by providing an engaging portion on the inner peripheral surface 45, and The second gasket 5 may be engaged with the second gasket to prevent return in the proximal direction.
- a plunger 6 for moving the second gasket 5 toward the distal end with respect to the inner cylinder 4 is connected to (attached to) the second gasket 5.
- the plunger 6 has a head portion 61 having an enlarged diameter at the tip.
- the second gasket 5 and the plunger 6 are connected and fixed by inserting and fitting the head portion 61 into the enlarged diameter portion at the tip of the hollow portion 53.
- a flange-shaped finger contact portion 62 is formed at the base end of the plunger 6.
- the plunger 6 is moved toward the distal end with respect to the inner cylinder 4 by pressing the finger contact portion 62 with a finger or the like.
- the return preventing means for the second gasket 5 since the return preventing means for the second gasket 5 is provided, a lock mechanism for the plunger 6 and the inner cylinder 4 is provided as in the related art, and the vicinity of the distal end of the inner cylinder 4 is provided.
- the plunger 6 in the present invention is for pressurizing the inside of the second space 46 (liquid 200) when the opening / closing mechanism 7A described later is changed from the closed state to the open state. Therefore, the plunger 6 only needs to be able to move the second gasket 5 by a slight stroke necessary to pressurize the inside of the second space 4'6 (the liquid 200).
- the length of the plunger 6 may be short. This allows the syringe 1A of the present invention to have a shorter overall length before use as shown in FIG. Therefore, the space for transportation and storage can be reduced, the operability is improved, and the handling is easy.
- the length of the plunger 6 is not particularly limited, but in order to exhibit the above-mentioned effect more remarkably, the length of the plunger 6 projecting from the base end of the inner cylinder 4 in the state before use shown in FIG. Is L 1 and the total length of the inner cylinder 4 is L 2, L 1 Z B 2 is preferably 0.1 or less, more preferably about 0.02 to 0.08.
- the opening / closing mechanism 7A switches from a closed state in which the first space 27 and the second space 46 are liquid-tightly separated to an open state in which the first space 27 and the second space 46 are communicated. It is possible.
- the opening / closing mechanism 7A includes a communication passage 71 formed as a lumen of the reduced diameter portion 42 of the inner cylinder 4, and a plug 7 movably installed in the communication passage 71. It consists of two.
- the opening / closing mechanism 7A is provided inside the first gasket 3. As a result, the syringe 1A can be further reduced in size (in particular, shortened in overall length).
- the communication passage 71 is formed on a first portion 71 1 having a smooth inner peripheral surface, and at a tip side of the first portion 71 1 1, and a plurality of ridges 7 13 are provided on the inner peripheral surface. And a second portion 712.
- the plug 72 has a substantially columnar shape, and two ring-shaped protrusions projecting toward the outer periphery are formed on the outer periphery over the entire periphery. These two projections are formed at the base end and the tip end of the plug 72, respectively.
- the stopper 72 is located at the first position 711, and the communication passage 71 is blocked (shielded).
- the first space 47 and the second space 46 are liquid-tightly separated. That is, the opening / closing mechanism 7A is in the closed state.
- a plurality of ridges 7 13 extending in the axial direction are formed on the inner peripheral surface of the second portion 7 12 of the communication passage 71.
- four ridges 7 13 are formed, and are arranged side by side at substantially equal angular intervals (90 ° intervals) along the circumferential direction.
- a groove 714 is formed between the adjacent ridges 713.
- the tip of the ridge 713 is slightly higher in height, so that the plug body 72 does not drop off to the first space 27 side.
- the plug body 72 is formed by the first portion 711.
- the plug 72 is in a closed state that blocks the first portion 71 1.
- the plunger 6 is pushed in from the closed state to pressurize the inside of the second space 46, the plug 72 moves to the second portion 712. That is, the pressure in the second space 46 becomes larger than the pressure in the first space 27, and the pressure difference causes the plug 72 to move to the second portion ⁇ 12 (second See figure).
- a groove is formed between the outer peripheral surface of the stopper 72 and the inner peripheral surface of the second portion 712.
- a gap is formed by the 714, and the liquid 200 can pass through the groove 714. That is, when the stopper 72 moves to the second portion 712, the opening / closing mechanism 7A is opened, and the first space 27 communicates with the second space 46.
- the opening and closing mechanism 7A can be reliably changed from the closed state to the open state by a simple operation.
- the opening and closing mechanism 7A can be changed from the closed state to the open state without operating the plunger 6. That is, when the inner cylinder 4 is moved relative to the outer cylinder 2 in the proximal direction from the state shown in FIG. 1, the inside of the first space 27 becomes negative pressure, whereby the second space 46 The pressure in the inside becomes larger than the pressure in the first space 27, and the plug 72 moves to the second portion 712 side.
- the plunger 6 may be omitted. By omitting the plunger 6, the overall length of the syringe 1A before use can be further reduced.
- FIG. 1 there is a gap between the outer peripheral surface 47 of the inner cylinder 4 and the inner peripheral portion on the proximal end side of the outer cylinder 2.
- An O-ring 11 is provided as a sealing member for sealing the gap.
- the O-ring 11 is held by a ring-shaped holding member 12 fixed to the base end face of the flange 25.
- the provision of such an O-ring 11 makes it possible to more reliably maintain the airtight and sterile state in the first space 27.
- the O-ring 11 also has a function of preventing the inner cylinder 4 from inclining with respect to the outer cylinder 2 when the inner cylinder 4 is moved with respect to the outer cylinder 2, that is, a function of preventing shaft shake. I do. Therefore, it is possible to prevent the protrusions 31 and 32 of the first gasket 3 from being separated from the inner peripheral surface 26 to form a gap due to shaft runout, thereby impairing airtightness and liquid tightness. .
- the inner cylinder 4 is moved in the proximal direction relative to the outer cylinder 2 from the state shown in FIG.
- the first gasket 3 connected to the inner cylinder 4 slides in the outer cylinder 2 in the proximal direction, and the pressure in the first space 27 is reduced to a negative pressure. Due to this negative pressure, the liquid 200 in the second space 46 (in the inner cylinder 4) flows into the first space 27 (in the outer cylinder 2) through the communication passage 71.
- the second gasket 5 automatically It slides relatively in the tip direction in the inner cylinder 4. At this time, the second gasket 5 moves smoothly because the sliding resistance in the tip direction is relatively small as described above.
- the first space 27 gradually expands, and the second space 27 gradually increases. To shrink.
- the first space 27 expands as the liquid 200 flows into the second space 46 and the first space 27, whereby the first space 27
- the drug 100 and the liquid 200 can be easily and reliably mixed and dissolved in the inside.
- the cap 24 is removed from the tip of the reduced diameter portion 22 to release the sealing, and the air in the first space 27 is released.
- connectors (not shown), tubes, a hub of a needle tube, and the like are fitted and attached to the reduced diameter portion 22.
- the inner cylinder 4 is moved toward the distal end relative to the outer cylinder 2.
- the first gasket 3 slides in the distal direction in the outer cylinder 2, and the solution (the solution composed of the drug 100 and the liquid 200) in the first space 27 is transferred to the connectors, It is sent (discharged) to tubes or the hub of a needle tube.
- the second gasket 5 On the other hand, it is prevented from returning in the proximal direction. Therefore, the solution in the first space 27 is prevented from flowing back to the second space 46.
- the second gasket 5 since the return prevention function is exhibited regardless of the position of the second gasket 5 in the inner cylinder 4, the second gasket 5 is completely moved toward the distal end. Even if the second gasket 5 is not moved (the amount of movement of the second gasket 5 is insufficient), the return of the second gasket 5 when the solution is delivered (discharged) is prevented, and thus the second space of the solution is provided. The backflow to 46 can be prevented more reliably.
- FIG. 8 and FIG. 9 are longitudinal sectional views each showing an opening / closing mechanism in a second embodiment of the syringe of the present invention. 8 shows the closed state of the opening and closing mechanism, and FIG. 9 shows the opened state of the opening and closing mechanism.
- the left side in FIGS. 8 and 9 is referred to as “distal end” and the right side is referred to as “proximal end”.
- the syringe 1B of this embodiment is the same as the first embodiment except that the configuration of the opening / closing mechanism is different.
- the opening / closing mechanism 7B of the present embodiment seals a communication passage 73 formed as an inner cavity of the reduced diameter portion 42 of the inner cylinder 4, and a distal end of the communication passage 73.
- a partition wall 74 provided so as to stop, a plug 75 movably installed in the communication passage 73, and a hollow needle (piercing member) 7 fixed to the center of the plug 75. It is composed of six.
- the plug 75 has a substantially columnar shape similarly to the plug 72, and two ring-shaped convex portions projecting toward the outer peripheral side are formed on the outer peripheral portion over the entire circumference. These two projections are formed at the base end and the tip end of the plug 75, respectively. These projections slide while closely contacting the inner peripheral surface of the communication path 73.
- the distal end of the communication passage 73 has a slightly reduced diameter, and the reduced diameter prevents the plug 75 from falling off to the first space 27 side.
- the partition wall portion 74 is formed integrally with the first gasket 3, and is formed of a thin portion of the first gasket 3.
- the hollow needle 76 is installed so as to penetrate the center of the plug 75.
- the distal end side of the hollow member 76 protrudes from the distal end surface of the plug 75, and a sharp tip 761 is formed at the distal end.
- the needle tip 761 is located on the base end side of the partition wall section 74.
- the hollow wall 76 penetrates the partition wall portion 74 as shown in FIG. As a result, the first space 27 and the second space 46 communicate with each other via the lumen 762 of the hollow space 76. That is, the opening / closing mechanism 7B is opened.
- the opening and closing mechanism 7B is changed from the closed state to the open state in the same manner as in the first embodiment. As described above, the operation can be performed by moving the inner cylinder 4 in the proximal direction relative to the outer cylinder 2 without operating the plunger 6.
- the structure can be further simplified.
- the first space 27 and the second space 46 are separated from each other by the partition wall portion 74, so that the first space 27 and the second space 46 are separated from each other.
- the air-tightness and liquid-tightness during the process are further improved, so that the dry state of the drug 100 can be more reliably maintained.
- each part constituting the syringe and the gasket may have any function that can exhibit the same function. It can be replaced with the configuration.
- the opening / closing mechanism is not limited to one that operates due to a pressure difference between the first space and the second space, and may be any type.
- the inner cylinder is connected to the second gasket so as to be rotatable around the axis, and the hole (flow path) formed in the second gasket and the hole formed in the bottom of the inner cylinder are determined by this rotation position. (Flow path) may be configured to be disconnected from each other, and may be switched from the closed state to the open state by rotating the inner cylinder.
- the total length in a state before use can be shortened, and the size can be reduced. Therefore, space for transportation and storage can be reduced, and handling during use is easy.
- the second gasket return prevention means is provided, the operation is simple, and it is possible to reliably prevent the solution from flowing back into the second space when the solution is delivered (discharged). it can.
- the return prevention means when the return prevention means is provided on the second gasket, or when the return prevention effect of the return prevention means is exerted regardless of the position of the second gasket in the inner cylinder, the operation is performed. In addition to being simpler, the solution can be more reliably prevented from flowing back into the second space when the solution is delivered (discharged).
- the opening / closing mechanism is configured to switch from the closed state to the open state due to a difference between the pressure in the first space and the pressure in the second space, the operation is further simplified. Can be used.
- gasket of the present invention return to the proximal end direction can be reliably prevented without providing another member. Therefore, for example, a two-chamber prefilled syringe can be suitably used for a syringe or the like that needs to prevent a suction operation, and the structure thereof can be simplified and the manufacturing cost can be reduced. In addition, the manufacture of the gasket itself is easy and suitable for mass production.
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2002359921A AU2002359921A1 (en) | 2001-12-28 | 2002-12-26 | Prefilled syringe |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001401904A JP4152104B2 (ja) | 2001-12-28 | 2001-12-28 | シリンジおよびガスケット |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2003074103A2 true WO2003074103A2 (ja) | 2003-09-12 |
WO2003074103A3 WO2003074103A3 (ja) | 2008-06-19 |
Family
ID=27640322
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2002/013690 WO2003074103A2 (ja) | 2001-12-28 | 2002-12-26 | プレフィルドシリンジ |
Country Status (3)
Country | Link |
---|---|
JP (1) | JP4152104B2 (ja) |
AU (1) | AU2002359921A1 (ja) |
WO (1) | WO2003074103A2 (ja) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
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EP1833532A1 (en) * | 2004-12-24 | 2007-09-19 | Moore, Ian Marshall | Safety syringe |
WO2016102446A1 (en) * | 2014-12-24 | 2016-06-30 | Ferrosan Medical Devices A/S | Syringe for retaining and mixing first and second substances |
CN107771093A (zh) * | 2015-07-03 | 2018-03-06 | 弗罗桑医疗设备公司 | 用于混合两种组分和用于在存储条件下保持真空的注射器 |
WO2018091912A1 (en) * | 2016-11-18 | 2018-05-24 | Owen Mumford Limited | Packaging and devices for mixing medicament substances |
WO2019141786A1 (en) * | 2018-01-19 | 2019-07-25 | Sanofi | Packaging container |
US10799611B2 (en) | 2012-06-12 | 2020-10-13 | Ferrosan Medical Devices A/S | Dry haemostatic composition |
JP2021503326A (ja) * | 2017-11-17 | 2021-02-12 | サノフイSanofi | デバイスならびに混合および/または再構成方法 |
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EP1849490A4 (en) * | 2005-02-15 | 2009-09-16 | Top Kk | SYRINGE |
JP4994775B2 (ja) | 2006-10-12 | 2012-08-08 | 日本コヴィディエン株式会社 | 針先保護具 |
WO2009022425A1 (ja) * | 2007-08-16 | 2009-02-19 | Kabushiki Kaisha Shofu | 偏芯した連通孔を備える薬剤混合容器 |
JP5463057B2 (ja) * | 2009-03-09 | 2014-04-09 | テルモ株式会社 | 日本薬局方注射用水が充填されてなるプレフィルドシリンジ |
JP6215546B2 (ja) * | 2013-03-21 | 2017-10-18 | 住友ゴム工業株式会社 | プレフィルドシリンジ用ガスケット |
WO2015067935A1 (en) * | 2013-11-05 | 2015-05-14 | 3P Innovation Limited | A pharmaceutical component-mixing delivery assembly |
JP6914913B2 (ja) * | 2016-03-29 | 2021-08-04 | テルモ株式会社 | 薬液投与器具、薬液投与器具の使用方法及び薬液投与器具の製造方法 |
MX2019003972A (es) | 2016-10-20 | 2019-06-12 | Henn Gmbh & Co Kg | Junta de acoplamiento de enchufe para un conducto de fluido de un motor de accionamiento. |
KR200489126Y1 (ko) * | 2017-08-24 | 2019-09-05 | 동화약품주식회사 | 주사기 |
US11337628B2 (en) | 2018-11-29 | 2022-05-24 | Becton, Dickinson And Company | Syringe-based delivery device for a vascular access instrument |
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Cited By (16)
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EP1833532A4 (en) * | 2004-12-24 | 2009-04-22 | Collyn Patent Holdings Pty Ltd | SAFETY SYRINGE |
EP1833532A1 (en) * | 2004-12-24 | 2007-09-19 | Moore, Ian Marshall | Safety syringe |
US10799611B2 (en) | 2012-06-12 | 2020-10-13 | Ferrosan Medical Devices A/S | Dry haemostatic composition |
US10653837B2 (en) | 2014-12-24 | 2020-05-19 | Ferrosan Medical Devices A/S | Syringe for retaining and mixing first and second substances |
WO2016102446A1 (en) * | 2014-12-24 | 2016-06-30 | Ferrosan Medical Devices A/S | Syringe for retaining and mixing first and second substances |
CN107206165A (zh) * | 2014-12-24 | 2017-09-26 | 弗罗桑医疗设备公司 | 用于保持并混合第一和第二物质的注射器 |
CN107206165B (zh) * | 2014-12-24 | 2020-10-23 | 弗罗桑医疗设备公司 | 用于保持并混合第一和第二物质的注射器 |
CN107771093A (zh) * | 2015-07-03 | 2018-03-06 | 弗罗桑医疗设备公司 | 用于混合两种组分和用于在存储条件下保持真空的注射器 |
US10918796B2 (en) | 2015-07-03 | 2021-02-16 | Ferrosan Medical Devices A/S | Syringe for mixing two components and for retaining a vacuum in a storage condition |
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WO2018091912A1 (en) * | 2016-11-18 | 2018-05-24 | Owen Mumford Limited | Packaging and devices for mixing medicament substances |
CN113995920A (zh) * | 2016-11-18 | 2022-02-01 | Om有限公司 | 用于混合药物物质的封装和设备 |
US11311673B2 (en) | 2016-11-18 | 2022-04-26 | Owen Mumford Limited | Packaging and devices for mixing medicament substances |
JP2021503326A (ja) * | 2017-11-17 | 2021-02-12 | サノフイSanofi | デバイスならびに混合および/または再構成方法 |
JP7366894B2 (ja) | 2017-11-17 | 2023-10-23 | サノフイ | デバイスならびに混合および/または再構成方法 |
WO2019141786A1 (en) * | 2018-01-19 | 2019-07-25 | Sanofi | Packaging container |
Also Published As
Publication number | Publication date |
---|---|
JP2003199824A (ja) | 2003-07-15 |
WO2003074103A3 (ja) | 2008-06-19 |
AU2002359921A1 (en) | 2003-09-16 |
AU2002359921A8 (en) | 2008-07-24 |
JP4152104B2 (ja) | 2008-09-17 |
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