WO2018169010A1 - 注射器組立体 - Google Patents
注射器組立体 Download PDFInfo
- Publication number
- WO2018169010A1 WO2018169010A1 PCT/JP2018/010263 JP2018010263W WO2018169010A1 WO 2018169010 A1 WO2018169010 A1 WO 2018169010A1 JP 2018010263 W JP2018010263 W JP 2018010263W WO 2018169010 A1 WO2018169010 A1 WO 2018169010A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cover member
- barrel
- syringe assembly
- guide tube
- puncture
- Prior art date
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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
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
- A61M5/3205—Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
- A61M5/321—Means for protection against accidental injuries by used needles
- A61M5/3243—Means for protection against accidental injuries by used needles being axially-extensible, e.g. protective sleeves coaxially slidable on the syringe barrel
- A61M5/3245—Constructional features thereof, e.g. to improve manipulation or functioning
-
- 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
- A61M5/28—Syringe ampoules or carpules, i.e. ampoules or carpules provided with a needle
- A61M5/281—Syringe ampoules or carpules, i.e. ampoules or carpules provided with a needle using emptying means to expel or eject media, e.g. pistons, deformation of the ampoule, or telescoping of the ampoule
-
- 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
- A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
- A61M5/3202—Devices for protection of the needle before use, e.g. caps
-
- 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
- A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
- A61M5/3205—Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
- A61M5/321—Means for protection against accidental injuries by used needles
- A61M5/3243—Means for protection against accidental injuries by used needles being axially-extensible, e.g. protective sleeves coaxially slidable on the syringe barrel
- A61M5/3271—Means for protection against accidental injuries by used needles being axially-extensible, e.g. protective sleeves coaxially slidable on the syringe barrel with guiding tracks for controlled sliding of needle protective sleeve from needle exposing to needle covering position
- A61M5/3272—Means for protection against accidental injuries by used needles being axially-extensible, e.g. protective sleeves coaxially slidable on the syringe barrel with guiding tracks for controlled sliding of needle protective sleeve from needle exposing to needle covering position having projections following labyrinth paths
Definitions
- the present invention relates to a syringe assembly provided with a protection device.
- a protection device for preventing inadvertent puncture due to exposure of a puncture needle before and after puncture for example, See US Patent Application Publication No. 2015/0018773.
- a protective device has a hollow cylindrical cover member that can be displaced relative to the barrel of the syringe in the axial direction. Before the puncture, the cover member covers the needle tip of the puncture needle. The cover member is displaced in the proximal direction with respect to the barrel by being pushed by the skin as the puncture needle punctures the skin.
- the cover member is uneven due to the clearance between the parts. For this reason, there is a possibility that the user may feel uneasy during use, and the puncture needle may come into contact with the inner surface of the cover member.
- the cover member is extended in the proximal direction in order to suppress the glare, the user's gripping area during use is limited and the usability is deteriorated.
- drum is covered with the cover member extended in the base end direction, chemical
- the present invention has been made in view of such problems, and an object of the present invention is to provide a syringe assembly capable of suppressing the glitch of the protective device without at least reducing the ease of use.
- the present invention provides a syringe having a puncture needle having a needle tip, a barrel for holding the puncture needle, a hollow cylindrical grip attached to an outer peripheral portion of the barrel, A hollow cylindrical cover member that is axially displaceable with respect to the barrel; the cover member covers at least a part of the puncture needle in an initial state, and the puncture is performed when the puncture needle is punctured into a puncture target
- the cover member is displaced relative to the barrel in the proximal direction by being pressed against the object, and is configured to cover the needle tip with the cover member after the puncture needle is punctured into the puncture object.
- a gripping portion a base portion provided with a finger-hanging portion protruding outward, an extending barrel portion protruding from the base portion in the distal direction, and a distal direction from the extending barrel portion.
- a guide tube that supports and guides the cover member from the outside when the cover member is displaced relative to the barrel in the axial direction, and an inner peripheral surface of the guide tube is formed of the cover member in the initial state. It is possible to contact the outer peripheral surface.
- the cover member of the protection device is supported from the outside, it is possible to suppress the cover member from being blurred.
- an area that can be gripped by the user can be secured during use, it can be used in various ways of holding and the usability does not deteriorate. Therefore, according to the syringe assembly of the present invention, it is possible to suppress the cover member from becoming uneven without reducing the ease of use.
- the guide tube may cover the entire circumference of the cover member at least when supporting and guiding the cover member from the outside.
- the guide tube may be provided with a side hole that exposes the barrel in order to make the inside of the barrel visible.
- the cover member in the proximal direction in order to suppress glare, so that the chemical solution visibility due to the cover member does not deteriorate.
- medical solution in a barrel can be easily visually recognized because a side hole is provided in a guide cylinder. Therefore, it is possible to suppress the variation of the cover member without reducing the chemical solution visibility.
- a plurality of the side holes may be provided at intervals in the circumferential direction.
- This configuration can improve the chemical solution visibility.
- the most distal end portion of the guide tube may be located on the front end side of the most proximal end portion of the cover member in the initial state of the protection device.
- the most distal end portion of the guide tube has an axial position substantially the same as the position of the distal end surface of the cover member when the cover member is relatively displaced in the proximal direction relative to the barrel by being pushed by the puncture target. May be located.
- This configuration makes it possible to maximize the length of the guide tube as long as the function of the protective device is not impaired. Therefore, it is possible to more effectively suppress the cover member from being blurred.
- the proximal end of the guide tube is located closer to the proximal end than the position of the proximal end of the cover member when the cover member is relatively displaced in the proximal direction relative to the barrel by being pushed by the puncture target. You may do it.
- the outer diameter of the proximal end portion of the guide tube may be larger than the outer diameter of the distal end portion of the extending body portion.
- This configuration forms a step due to a difference in outer diameter between the proximal end portion of the guide tube and the distal end portion of the extending barrel portion. For this reason, when the syringe assembly is pushed in the distal direction in order to puncture the puncture target into the puncture target, it is possible to effectively suppress the user's finger gripping the extending body part from sliding in the distal direction.
- the grip may have an engaging protrusion that restricts displacement of the grip in the distal direction relative to the barrel by engaging with a proximal end surface of a flange provided at a proximal end portion of the barrel.
- This configuration can effectively prevent the grip from shifting in the tip direction with respect to the barrel.
- the engaging protrusion may be provided on a protruding piece protruding in a proximal direction from a proximal end surface of the base portion.
- This configuration makes it easy for the engaging protrusion to elastically deform outward when the grip is attached to the barrel. For this reason, it is possible to easily attach the grip to the barrel.
- the syringe assembly fills a liquid chamber formed by a gasket slidably inserted into the barrel, a pusher connected to or connectable to the gasket, and the barrel and the gasket.
- a chemical solution A chemical solution.
- the syringe assembly of the present invention it is possible to suppress the glare of the protective device without reducing the ease of use.
- FIG. 2 is a cross-sectional view taken along line II-II in FIG.
- FIG. 3 is a sectional view taken along line III-III in FIG. 2. It is the perspective view which looked at the base end part of the grip from the base end side. It is a perspective view of the syringe assembly at the time of puncture. It is a perspective view of the syringe assembly after puncture.
- proximal end refers to an end portion on the side close to the user who operates the syringe
- tip refers to an end portion on the side away from the user.
- a syringe assembly 10 includes a prefilled syringe 12A as a syringe 12, a protection device 14 attached to the prefilled syringe 12A, and a grip 16 attached to the prefilled syringe 12A.
- the prefilled syringe 12 ⁇ / b> A is provided at a hollow barrel 18 constituting the barrel of the syringe 12, a drug solution M filled in the barrel 18, a gasket 22 inserted in the barrel 18, and a tip of the barrel 18.
- a needle holder 24 and a puncture needle 26 held by the needle holder 24 are provided.
- the barrel 18 is a hollow body having a substantially cylindrical barrel body 23 and a proximal end opening 18a at the proximal end.
- the barrel 18 is made of a transparent material so that the inside (filled chemical M) can be visually recognized from the outside.
- a flange 28 is formed on the outer peripheral portion of the base end of the barrel 18 so as to protrude radially outward.
- a needle holding portion 24 is provided at the distal end portion of the barrel body portion 23.
- the needle holding part 24 is reduced in diameter with respect to the barrel body part 23 and extends from the center of the distal end of the barrel body part 23 in the distal direction to hold the proximal end part of the puncture needle 26.
- the flange 28 and the needle holding part 24 are formed integrally with the barrel body part 23.
- a gasket 22 is inserted through a base end opening 18a.
- the proximal end side of the barrel 18 is liquid-tightly sealed by the gasket 22, and the chemical solution M is sealed in the barrel 18.
- the gasket 22 is arranged so that its outer peripheral portion is in liquid-tight contact with the inner peripheral surface of the barrel 18 and is slidable in the barrel 18.
- the tip of the pusher 30 is connected to the gasket 22.
- the pusher 30 may be connected to the gasket 22 when the patient is punctured with the puncture needle 26 and the medicinal solution M is administered to the patient.
- the puncture needle 26 is a hollow body in which a lumen as a fluid passage is formed, and a sharp needle tip 27 is formed at the tip thereof.
- the puncture needle 26 protrudes from the needle holding portion 24 in the distal direction.
- the lumen of the puncture needle 26 communicates with the hollow portion (liquid chamber) of the barrel 18 through the proximal end opening of the puncture needle 26.
- the drug solution M accommodated in the hollow interior of the barrel 18 is discharged from the tip of the lumen of the puncture needle 26 and administered to the patient.
- the protective device 14 covers the puncture needle 26 before and after the puncture of the puncture needle 26 to the patient, thereby preventing inadvertent punctures other than when the drug solution M is administered to the patient. is there.
- the protection device 14 includes at least a hollow cylindrical cover member 32 that can be displaced relative to the barrel 18 in the axial direction.
- the cover member 32 has a distal end located on the distal end side of the needle tip 27 of the puncture needle 26 and covers the needle tip 27.
- the cover member 32 is relatively displaced in the proximal direction with respect to the barrel 18 when the puncture needle 26 is punctured into the patient to be punctured, and the puncture needle 26 protrudes in the distal direction from the distal end opening 32a of the cover member 32 (FIG. 5).
- the cover member 32 is displaced relative to the barrel 18 in the distal direction after the puncture and covers the needle tip 27 of the puncture needle 26 again (see FIG. 6).
- the needle tip 27 of the puncture needle 26 may protrude from the distal end opening 32a of the cover member 32 in the distal direction.
- the configuration of the protection device 14 including the cover member 32 that acts in this way is not limited to a specific configuration, and can take various forms. Therefore, for example, the protection device 14 may be configured as described below, or may be configured in another form.
- the protection device 14 includes an inner member 31 that is rotatably mounted on the outer periphery of the needle holding portion 24, a cover member 32 that is movable in the axial direction relative to the inner member 31, A spring member 33 (biasing member) that biases the cover member 32 in the distal direction may be provided.
- the cover member 32 is formed of a hollow body having a side wall 32d that forms a through hole 32c extending from the distal end to the base end, and the inner member 31 is accommodated in the through hole 32c.
- the cover member 32 includes an inner cover 32A having the through hole 32c and an outer cover 32B fixed to the outer peripheral surface of the inner cover 32A.
- An inner diameter D4 of the cover member 32 is slightly larger than an outer diameter D2 of the barrel body 23.
- the most proximal end portion of the cover member 32 is located at substantially the same axial position as the distal end portion of the barrel body portion 23.
- a cam protrusion 31 a that protrudes radially outward is formed on the outer peripheral portion of the inner member 31.
- a guide path 32e is formed in the side wall 32d of the cover member 32, and the cam projection 31a of the inner member 31 is movably disposed in the guide path 32e.
- the guide path 32e is provided in the inner cover 32A.
- the spring member 33 is accommodated in the through hole 32 c of the cover member 32, and biases the cover member 32 toward the distal end direction with respect to the inner member 31. 2 and 3, the illustration of the cap 34 (FIG. 1) is omitted.
- the cover member 32 is relatively displaced in the proximal direction with respect to the barrel 18 from the initial position with the puncture operation of the puncture needle 26 to the patient, and is guided to the retracted position. It may be configured to be relatively displaced in the distal direction with respect to the barrel 18 from the retracted position in accordance with the extraction operation and guided to the lock position.
- the cover member 32 covers the needle tip 27 of the puncture needle 26 at the initial position.
- the puncture needle 26 is protruded from the distal end opening 32a at the retracted position, and the needle tip 27 of the puncture needle 26 is covered at the locked position.
- the cover member 32 moves from the initial position to the retracted position, the spring member 33 is compressed in the axial direction.
- the cover member 32 is moved from the retracted position to the locked position by the elastic biasing force of the spring member 33 when the puncture needle 26 is removed.
- the needle tip 27 may be exposed (protruded) from the tip opening 32a of the cover member 32.
- the inner member 31 moves relative to the cover member 32 by moving the cam protrusion 31a in the guide path 32e. Rotate relatively.
- the inner member 31 restricts relative displacement of the cover member 32 in the proximal direction with respect to the inner member 31 when the cover member 32 moves to the lock position.
- the cap 34 covers the puncture needle 26.
- the cap 34 is made of a flexible resin material such as a rubber material, and has a sealing portion 34a into which the puncture needle 26 is inserted.
- the puncture needle 26 is covered and inserted into the cover member 32 so as to seal the needle tip 27 (tip opening of the puncture needle 26).
- the cap 34 is removed by the user pulling the distal end portion and pulling out the distal end portion.
- the grip 16 in the product provision state of the syringe assembly 10, as shown in FIG. 1, the grip 16 is attached to the outer peripheral portion of the proximal end of the prefilled syringe 12A. In the product providing state, the grip 16 is separated from the prefilled syringe 12A, and may be attached to the outer periphery of the proximal end of the prefilled syringe 12A when used by the user.
- the grip 16 includes a base portion 36 having a pair of finger hanging portions 38, an extending body portion 40 protruding from the base portion 36 in the distal direction, and a guide tube 42 extending from the extending body portion 40 in the distal direction. .
- the base portion 36 is a portion constituting the base end portion of the grip 16 and is formed in a plate shape orthogonal to the axis of the grip 16.
- the pair of finger hooks 38 in the base portion 36 protrude in a flange shape in the opposite directions perpendicular to the axis of the grip 16.
- the shape of the base part 36 seen from the axial direction is relatively long in the protruding direction of the finger-hanging part 38, and is relatively short in the direction orthogonal to the protruding direction.
- the pair of finger hooks 38 protrude outward from the flange 28.
- the base end surface 36a of the base portion 36 is provided with a stepped (concave) flange housing portion 36b having a depth in the axial direction.
- Two flange accommodating portions 36b are provided at positions opposite to each other about the axis of the grip 16. Both ends in the major axis direction of the flange 28 are accommodated in the two flange accommodating portions 36b, respectively.
- the depth of the flange accommodating portion 36 b is set to be substantially the same as the thickness of the flange 28.
- the grip 16 has an engagement protrusion 44 that restricts displacement of the grip 16 in the distal direction relative to the barrel 18 by engaging with a proximal end surface of a flange 28 provided at a proximal end portion of the barrel 18.
- the engaging protrusion 44 bulges inward (on the grip 16 shaft side).
- the engagement protrusion 44 is provided on the inner surface of the protruding piece 46 that extends from the base end surface 36 a of the base portion 36 toward the base end.
- the projecting pieces 46 are provided in an arc shape along the flange accommodating portion 36b, and two projecting pieces 46 are provided facing each other around the axis of the grip 16.
- the engaging protrusions 44 are configured to engage with both ends of the flange 28 in the long axis direction.
- the flange 28 of the barrel 18 is disposed in the flange accommodating portion 36 b and is locked by the engaging protrusion 44 in a state where the grip 16 is mounted on the barrel 18. Thereby, the relative movement of the grip 16 in the axial direction with respect to the barrel 18 is restricted.
- the extended body portion 40 is formed in a hollow cylindrical shape that protrudes from the base portion 36 in the distal direction.
- the inner diameter D ⁇ b> 1 of the extension body 40 is larger than the outer diameter D ⁇ b> 2 of the barrel body 23.
- a space S ⁇ b> 1 that is annular and extends in the axial direction is formed between the inner peripheral surface of the extending body portion 40 and the outer peripheral surface of the barrel body portion 23.
- the inner diameter D1 of the extending body portion 40 may be set to be substantially the same as the outer diameter D2 of the barrel body portion 23, and the barrel body portion 23 may be supported by the inner peripheral surface of the extending body portion 40.
- the guide tube 42 supports and guides the cover member 32 from the outside when the cover member 32 is displaced relative to the barrel 18 in the axial direction.
- the inner peripheral surface of the guide cylinder 42 can contact the outer peripheral surface of the cover member 32 in the initial state.
- the guide cylinder 42 is formed in a hollow cylindrical shape.
- the leading end portion (tip opening 32a) of the guide tube 42 is located on the tip side of the most base end portion (base end opening 32b) of the cover member 32 in the initial state of the protection device 14 shown in FIGS. More specifically, the leading end portion of the guide tube 42 is formed on the distal end surface of the cover member 32 when the cover member 32 is relatively displaced in the proximal direction with respect to the barrel 18 by being pushed by the puncture target. It is located at substantially the same axial position as the position (see FIG. 5).
- the most distal portion (tip opening 32 a) of the guide tube 42 is located on the tip side with respect to the tip surface of the needle holding portion 24.
- the guide tube 42 is configured to cover the cover member 32 over the entire circumference when at least the cover member 32 is supported and guided from the outside.
- the guide cylinder 42 has an annular guide portion 48 that surrounds the entire circumference of the cover member 32.
- the annular guide part 48 constitutes the tip part of the guide cylinder 42.
- the annular guide portion 48 covers the proximal end side region of the cover member 32.
- the range (axial length) in which the annular guide portion 48 covers the cover member 32 in the initial state of the protection device 14 is, for example, 4 minutes of the entire length of the cover member 32 (length from the distal end opening 32a to the proximal end opening 32b). 1 or more, preferably 1/3 or more of the total length of the cover member 32.
- the inner diameter D3 of the guide tube 42 is larger than the outer diameter D2 of the barrel body 23. For this reason, an annular space S ⁇ b> 2 extending in the axial direction is formed between the inner peripheral surface of the guide cylinder 42 and the outer peripheral surface of the barrel body 23.
- the space S1 in the extension body 40 and the space S2 in the guide tube 42 communicate with each other.
- the inner diameter D ⁇ b> 3 of the guide cylinder 42 is constant along the axial direction and is set to be the same as the inner diameter D ⁇ b> 1 of the extending body portion 40.
- the inner diameter D3 of the guide tube 42 may be different from the inner diameter D1 of the extending body portion 40.
- the inner diameter D3 of the guide cylinder 42 is slightly smaller than the outer diameter D5 of the cover member 32 so that the axial movement of the cover member 32 is not disturbed while the guide cylinder 42 stably guides the axial movement of the cover member 32. It is set large.
- the ratio of the inner diameter D3 of the guide cylinder 42 to the outer diameter D5 of the cover member 32 is set to, for example, 100 to 115%, and preferably 100 to 103%.
- the outer diameter of the guide tube 42 decreases toward the tip. Therefore, the thickness of the guide cylinder 42 decreases toward the distal direction. Note that the outer diameter of the guide tube 42 may be constant along the axial direction. In FIG. 2, the outer diameter of the proximal end portion of the guide tube 42 is larger than the outer diameter of the distal end portion of the extending body portion 40. Between the extending body 40 and the guide tube 42, an outer diameter changing portion 43 that expands in a flared shape toward the distal end is formed.
- the extended body portion 40 is formed to be narrower than the base portion 36 and the guide tube 42. Therefore, a constricted portion 40 a having a shape recessed inward in the radial direction is formed by the extending body portion 40 between the base portion 36 (finger holding portion) and the guide tube 42 in the outer peripheral portion of the grip 16.
- the step formed by the difference in the outer diameter between the proximal end portion of the guide tube 42 and the distal end portion of the extending barrel portion 40 causes the syringe 12 to move in the distal direction so that the user punctures the patient's skin with the puncture needle 26 of the syringe 12
- the user's finger holding the extended body portion 40 is prevented from slipping in the distal end direction when being pushed in.
- the guide tube 42 is provided with a side hole 50 that exposes the barrel 18 so that the inside of the barrel 18 (medical solution M filled in the barrel 18) can be visually recognized. Yes.
- the side hole 50 is provided on the proximal end side with respect to the annular guide portion 48.
- the side hole 50 penetrates the peripheral wall portion constituting the guide tube 42 in the thickness direction.
- a plurality of side holes 50 are provided at intervals in the circumferential direction. In the present embodiment, two side holes 50 are provided at positions opposite to each other about the axis of the barrel 18.
- the side hole 50 has a shape of a long hole extending in the axial direction.
- the side hole 50 is formed so that the region filled with the drug solution M in the barrel 18 can be seen over the entire range in the axial direction in the initial state of the syringe assembly 10 (before the drug solution is discharged).
- the side hole 50 is formed from a position corresponding to the tip of the barrel body 23 to a position corresponding to at least the tip of the gasket 22 at the initial position.
- the opening width W of the side hole 50 (the width along the circumferential direction of the barrel 18) is, for example, When the inner diameter of the barrel 18 is 6.3 mm, the inner diameter is set to 1 to 11 mm, preferably 5 to 7 mm.
- the constituent material of the grip 16 is not particularly limited, and examples thereof include resin materials such as polypropylene, polycarbonate, polyamide, polysulfone, polyarylate, ABS, and high-density polyethylene.
- the user When administering the drug solution M to the patient, the user (which may be the patient himself) first connects the pusher 30 to the gasket 22 to obtain the state shown in FIG. As shown in FIG. 1, the syringe assembly 10 may be provided to the user in a state where the pusher 30 is connected to the gasket 22 in advance.
- the cap 34 is pulled out from the cover member 32 and the cap 34 is detached from the puncture needle 26.
- the cover member 32 is biased to the initial position (pre-puncture position) by the elastic biasing force of the spring member 33 (see FIG. 2) described above, and the puncture needle 26 reaches the tip 27 of the tip. Therefore, the puncture needle 26 is prevented from being inadvertently punctured by a user or the like.
- the user hangs two fingers (for example, the index finger and the middle finger) on the pair of finger hanging portions 38, and grips the extended trunk portion 40 (constricted portion 40a) with the two fingers. Grip.
- the user positions the tip of the cover member 32 in contact with the puncture site (arm or the like) of the patient, and further pushes the barrel 18 through the grip 16.
- the cover member 32 is displaced relative to the barrel 18 in the proximal direction against the elastic biasing force of the spring member 33.
- the puncture needle 26 held by the needle holding portion 24 is exposed from the distal end opening 32a of the cover member 32, and the cover member 32 is the most movable range relative to the barrel 18.
- the cover member 32 moves in the proximal direction in an annular space S ⁇ b> 2 (see FIG. 2) formed between the barrel body 23 and the guide cylinder 42.
- the user presses the pusher 30 in the distal direction.
- the drug solution M filled in the barrel 18 is discharged from the puncture needle 26 via the lumen of the puncture needle 26.
- the drug solution M is administered to the patient.
- the cover member 32 After administration of the drug solution M, the cover member 32 is pulled away from the patient together with the prefilled syringe 12A. At this time, the spring member 33 disposed in the cover member 32 expands due to the elastic restoring force and urges the cover member 32 toward the barrel 18 in the distal direction. As a result, as shown in FIG. 6, the cover member 32 is displaced relative to the barrel 18 in the distal direction, and moves from the retracted position to the locked position. When the cover member 32 reaches the locked position, the puncture needle 26 is covered up to the needle tip 27 by the cover member 32 and relative displacement of the cover member 32 in the proximal direction with respect to the barrel 18 is prevented. Therefore, careless puncture can be avoided even after administration of the drug solution M to the patient.
- the syringe assembly 10 according to the present embodiment has the following effects.
- the cover member 32 of the protection device 14 is supported from the outside by the guide cylinder 42 of the grip 16, so that when the cover member 32 moves in the proximal direction with respect to the barrel 18, the cover member
- the cover member 32 is not only supported (guided) by the outer peripheral surface of the barrel body 23 but also supported (guided) by the inner peripheral surface of the guide tube 42 of the grip 16.
- the syringe assembly 10 it is possible to prevent the barrel body 23 from becoming uneven without extending the length of the cover member 32 in the proximal direction. Thereby, the area
- the guide tube 42 covers the cover member 32 over the entire circumference when at least the cover member 32 is supported and guided from the outside. With this configuration, it is possible to suppress the variation over all directions around the cover member 32.
- the guide tube 42 is provided with a side hole 50 that exposes the barrel 18 so that the inside of the barrel 18 is visible.
- the side holes 50 are provided in the guide cylinder 42, so that the chemical solution M in the barrel 18 can be easily visually confirmed. Therefore, it is possible to suppress the unevenness of the cover member 32 without reducing the chemical solution visibility.
- a plurality of side holes 50 are provided at intervals in the circumferential direction. For this reason, chemical solution visibility can be improved.
- the most distal end portion of the guide tube 42 is located on the distal end side of the most proximal end portion of the cover member 32 in the initial state of the protection device 14.
- the leading end portion of the guide cylinder 42 is the position of the distal end surface of the cover member 32 when the cover member 32 is relatively displaced in the proximal direction relative to the barrel 18 by being pushed by the puncture target.
- the length of the guide cylinder 42 can be maximized within a range that does not hinder the function of the protection device 14. Therefore, it is possible to more effectively suppress the unevenness of the cover member 32.
- the proximal end of the guide tube 42 is located closer to the proximal end than the proximal end position of the cover member 32 when the cover member 32 is pushed by the puncture target and is relatively displaced relative to the barrel 18 in the proximal direction. ing. With this configuration, until the cover member 32 is displaced in the most proximal direction, it is possible to reliably suppress the variation of the cover member 32 and to ensure a region that can be gripped by the user during use.
- the outer diameter of the proximal end portion of the guide tube 42 is larger than the outer diameter of the distal end portion of the extending body portion 40. With this configuration, a step is formed due to a difference in outer diameter between the proximal end portion of the guide tube 42 and the distal end portion of the extending body portion 40. For this reason, when the syringe assembly 10 is pushed in the distal direction in order to puncture the puncture needle 26 into the puncture target, it effectively suppresses the user's finger gripping the extending body 40 from sliding in the distal direction. Can do.
- the grip 16 engages with a proximal end surface of a flange 28 provided at a proximal end portion of the barrel 18, thereby restricting displacement of the grip 16 in the distal end direction with respect to the barrel 18.
- the engaging protrusion 44 is provided on a protruding piece 46 that protrudes in the proximal direction from the proximal end surface of the base portion 36.
- the syringe 12 is not limited to the prefilled syringe 12A, and may be a syringe filled with the drug solution M after the product is provided.
- the extending body portion 40 may be formed in a columnar shape that extends in parallel from the base portion 36 and is connected to the proximal end of the guide tube 42 instead of the tubular shape. In this case, it is preferable to form the extending body part 40 as a pair of columnar parts.
Abstract
Description
Claims (11)
- 針先(27)を有する穿刺針(26)と、前記穿刺針(26)を保持するバレル(18)とを有する注射器(12)と、
前記バレル(18)の外周部に装着された中空筒状のグリップ(16)と、
前記バレル(18)に対して軸方向に相対変位可能な中空筒状のカバー部材(32)を有し、初期状態で前記カバー部材(32)が前記穿刺針(26)の少なくとも一部を覆い、穿刺対象への前記穿刺針(26)の穿刺時に前記穿刺対象に対して押しつけられることで前記カバー部材(32)が前記バレル(18)に対して基端方向に相対変位し、前記穿刺対象への前記穿刺針(26)の穿刺後に前記カバー部材(32)により前記針先(27)を覆うように構成された保護装置(14)と、を備え、
前記グリップ(16)は、外方に突出した指掛け部(38)が設けられたベース部(36)と、前記ベース部(36)から先端方向に突出した延出胴部(40)と、前記延出胴部(40)から先端方向に延出するとともに前記バレル(18)に対する前記カバー部材(32)の軸方向への相対変位時に前記カバー部材(32)を外側から支持及び案内するガイド筒(42)とを有し、
前記ガイド筒(42)の内周面は、前記初期状態にある前記カバー部材(32)の外周面に当接可能である、
ことを特徴とする注射器組立体(10)。 - 請求項1記載の注射器組立体(10)において、
前記ガイド筒(42)は、少なくとも前記カバー部材(32)を外側から支持及び案内する際、前記カバー部材(32)を全周に亘って覆う、
ことを特徴とする注射器組立体(10)。 - 請求項1又は2記載の注射器組立体(10)において、
前記ガイド筒(42)には、前記バレル(18)の内部を視認可能とするために前記バレル(18)を露出させる側孔(50)が設けられている、
ことを特徴とする注射器組立体(10)。 - 請求項3記載の注射器組立体(10)において、
前記側孔(50)は、周方向に間隔を置いて複数設けられている、
ことを特徴とする注射器組立体(10)。 - 請求項1~4のいずれか1項に記載の注射器組立体(10)において、
前記ガイド筒(42)の最先端部は、前記保護装置(14)の初期状態で前記カバー部材(32)の最基端部よりも先端側に位置している、
ことを特徴とする注射器組立体(10)。 - 請求項1~5のいずれか1項に記載の注射器組立体(10)において、
前記ガイド筒(42)の最先端部は、前記カバー部材(32)が前記穿刺対象に押されることで前記バレル(18)に対して最も基端方向に相対変位した際の前記カバー部材(32)の先端面の位置と略同じ軸方向位置に位置している、
ことを特徴とする注射器組立体(10)。 - 請求項1~6のいずれか1項に記載の注射器組立体(10)において、
前記ガイド筒(42)の基端は、前記カバー部材(32)が前記穿刺対象に押されることで前記バレル(18)に対して最も基端方向に相対変位した際の前記カバー部材(32)の基端の位置よりも基端側に位置している、
ことを特徴とする注射器組立体(10)。 - 請求項1~7のいずれか1項に記載の注射器組立体(10)において、
前記ガイド筒(42)の基端部の外径は、前記延出胴部(40)の先端部の外径よりも大きい、
ことを特徴とする注射器組立体(10)。 - 請求項1~8のいずれか1項に記載の注射器組立体(10)において、
前記グリップ(16)は、前記バレル(18)の基端部に設けられたフランジ(28)の基端面に係合することにより前記バレル(18)に対する前記グリップ(16)の先端方向への変位を規制する係合突起(44)を有する、
ことを特徴とする注射器組立体(10)。 - 請求項9記載の注射器組立体(10)において、
前記係合突起(44)は、前記ベース部(36)の基端面から基端方向に突出する突出片(46)に設けられている、
ことを特徴とする注射器組立体(10)。 - 請求項1~10のいずれか1項に記載の注射器組立体(10)において、
前記バレル(18)内に摺動可能に挿入されたガスケット(22)と、
前記ガスケット(22)に連結され又は前記ガスケット(22)に連結可能な押子(30)と、
前記バレル(18)と前記ガスケット(22)とにより形成される液室に充填された薬液(M)と、を備える、
ことを特徴とする注射器組立体(10)。
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EP18767522.8A EP3597244A4 (en) | 2017-03-17 | 2018-03-15 | SYRINGE SET |
JP2019506269A JPWO2018169010A1 (ja) | 2017-03-17 | 2018-03-15 | 注射器組立体 |
US16/572,460 US20200009328A1 (en) | 2017-03-17 | 2019-09-16 | Syringe assembly |
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JP2017-052135 | 2017-03-17 | ||
JP2017052135 | 2017-03-17 |
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US16/572,460 Continuation US20200009328A1 (en) | 2017-03-17 | 2019-09-16 | Syringe assembly |
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WO2018169010A1 true WO2018169010A1 (ja) | 2018-09-20 |
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PCT/JP2018/010263 WO2018169010A1 (ja) | 2017-03-17 | 2018-03-15 | 注射器組立体 |
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US (1) | US20200009328A1 (ja) |
EP (1) | EP3597244A4 (ja) |
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WO (1) | WO2018169010A1 (ja) |
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CN109718429A (zh) * | 2019-02-15 | 2019-05-07 | 贝普医疗科技有限公司 | 一种安全胰岛素针 |
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JP2001518366A (ja) * | 1997-10-02 | 2001-10-16 | セイフティ・シリンジーズ・インコーポレイテッド | 使い捨て自己遮蔽式単位投与量シリンジガード |
US20140025013A1 (en) * | 2009-08-19 | 2014-01-23 | Safety Syringes, Inc. | Patient-contact activated needle stick safety device |
US20150018773A1 (en) | 2012-03-07 | 2015-01-15 | West Pharmaceutical Services, Inc. | Low radial profile needle safety device |
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US20010031949A1 (en) * | 1999-06-18 | 2001-10-18 | Asbaghi Hooman A. | Protective device for a prefilled injection syringe |
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2018
- 2018-03-15 WO PCT/JP2018/010263 patent/WO2018169010A1/ja active Application Filing
- 2018-03-15 EP EP18767522.8A patent/EP3597244A4/en not_active Withdrawn
- 2018-03-15 JP JP2019506269A patent/JPWO2018169010A1/ja active Pending
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2019
- 2019-09-16 US US16/572,460 patent/US20200009328A1/en not_active Abandoned
Patent Citations (3)
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JP2001518366A (ja) * | 1997-10-02 | 2001-10-16 | セイフティ・シリンジーズ・インコーポレイテッド | 使い捨て自己遮蔽式単位投与量シリンジガード |
US20140025013A1 (en) * | 2009-08-19 | 2014-01-23 | Safety Syringes, Inc. | Patient-contact activated needle stick safety device |
US20150018773A1 (en) | 2012-03-07 | 2015-01-15 | West Pharmaceutical Services, Inc. | Low radial profile needle safety device |
Non-Patent Citations (1)
Title |
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See also references of EP3597244A4 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109718429A (zh) * | 2019-02-15 | 2019-05-07 | 贝普医疗科技有限公司 | 一种安全胰岛素针 |
CN109718429B (zh) * | 2019-02-15 | 2024-01-16 | 贝普医疗科技股份有限公司 | 一种安全胰岛素针 |
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US20200009328A1 (en) | 2020-01-09 |
EP3597244A1 (en) | 2020-01-22 |
EP3597244A4 (en) | 2020-09-02 |
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