WO2010024209A1 - 注射器 - Google Patents
注射器 Download PDFInfo
- Publication number
- WO2010024209A1 WO2010024209A1 PCT/JP2009/064683 JP2009064683W WO2010024209A1 WO 2010024209 A1 WO2010024209 A1 WO 2010024209A1 JP 2009064683 W JP2009064683 W JP 2009064683W WO 2010024209 A1 WO2010024209 A1 WO 2010024209A1
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- WO
- WIPO (PCT)
- Prior art keywords
- syringe
- tip
- hole diameter
- cap
- range
- Prior art date
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Classifications
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- 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
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- 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
-
- 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
-
- 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
- A61M2005/3103—Leak prevention means for distal end of syringes, i.e. syringe end for mounting a needle
- A61M2005/3104—Caps for syringes without needle
-
- 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
- A61M5/3129—Syringe barrels
- A61M5/3137—Specially designed finger grip means, e.g. for easy manipulation of the syringe rod
- A61M2005/3139—Finger grips not integrally formed with the syringe barrel, e.g. using adapter with finger grips
Definitions
- the present invention relates to a syringe, and more particularly to a syringe used for a prefilled syringe (Pre-filled syringe).
- the prefilled syringe is shipped in a state in which a cap is attached to the tip nozzle of the syringe, and thereby the filling chemical solution inside is sealed.
- the present invention relates to a syringe that can eliminate the possibility of stringing from a tip nozzle when actually used after being shipped as a prefilled syringe.
- the filling chemical solution inside is sealed between a gasket fitted from the proximal end opening of the syringe for the prefilled syringe and a cap attached to the tip nozzle. And the prefilled syringe which sealed this filling chemical
- medical solution is delivered to a medical institution etc. after providing a sterilization process.
- Patent Document 1 discloses the following prefilled syringe. That is, a luer lock is formed so as to surround the tip nozzle of the prefilled syringe, and a cap is attached to the tip nozzle so as to cover the outer surface of the luer lock, and from the tip to the base end with respect to the outer surface of the luer lock. Thus, it is disclosed that a deaeration groove is formed. In this product, the air enclosed in the gap between the tip nozzle and the luer lock is prevented from expanding due to heating or the like during the sterilization process, thereby preventing the cap from falling off. is doing.
- a prefilled syringe in which a high sealing performance is secured without using a separate sealing material for the sealing performance between the tip nozzle and the cap (see, for example, Patent Document 2).
- a nozzle side screwing portion is formed on the proximal end side of the tip nozzle, and an annular thick portion is formed on the tip portion of the tip nozzle.
- a cylindrical portion that includes a sealing portion and is fitted on the cap and a cap-side screwing portion that is screwed with the nozzle-side screwing portion are formed. The cylindrical portion of the cap makes an annular contact with the annular thick portion at the tip of the tip nozzle, and the sealing portion of the cap enters the tip opening of the tip nozzle.
- the inner peripheral surface 105 of the cap 103 is connected to the outer peripheral surface 104 of the tip nozzle 101.
- the inner filling chemical liquid 106 is maintained in a sealed state.
- the gap space K formed between the two is expanded in a sealed state, the gap space K is in a substantially vacuum state (depressurized state).
- a substantially vacuum state depressurized state
- the cap 103 is tilted with respect to the tip nozzle 101 and the close contact between the inner peripheral surface 105 of the cap 103 and the outer peripheral surface 104 of the tip nozzle 101 is separated even for a moment, air enters the gap space K and the above-mentioned Such a vacuum state is destroyed.
- the present invention has been made in view of such circumstances, and the object of the present invention is to avoid the occurrence of stringing even when the filling chemical liquid has a high viscosity. It is an object of the present invention to provide a syringe that can avoid the occurrence of inconvenience.
- a syringe including a cap for sealing an opening and a gasket for sealing the proximal end of the barrel by being fitted from the proximal opening of the barrel. It was. That is, the hole diameter of the inner hole at least at the tip opening position of the tip nozzle is substantially set to a hole diameter range from 0.1 mm to 1.0 mm. More preferably, the hole diameter of the inner hole is set to a hole diameter range from 0.5 mm to 1.0 mm.
- the tip opening of the tip nozzle is Since the hole diameter is as small as 0.1 mm to 1.0 mm as described above, the diameter of the filled chemical solution to be sucked becomes very thin corresponding to the hole diameter of the tip opening. For this reason, even if the filling chemical solution is a highly viscous chemical solution, the attached filling chemical solution is immediately interrupted and no stringing occurs as the cap is further pulled out.
- a prefilled syringe in a barrel sealed by a cap mounted on the tip nozzle and a gasket fitted in the barrel, 1,000 mPa ⁇ s (unit “mPa ⁇ s” is in milli-pascal / second). The same shall apply hereinafter) to 60,000 mPa ⁇ s, and a prefilled syringe can be constructed by filling a chemical solution having a viscosity ranging from 60,000 mPa ⁇ s. That is, it is configured as a prefilled syringe by filling a high-viscosity chemical solution ranging from 1,000 mPa ⁇ s to 60,000 mPa ⁇ s.
- a hyaluronic acid preparation can be used. Even when using a prefilled syringe filled with this hyaluronic acid preparation, it is possible to avoid the occurrence of stringing at the time of cap removal at the time of use, and to prevent the occurrence of inconvenience due to stringing. .
- the cap can be provided with a cylindrical portion that is fitted on the tip nozzle.
- the inner peripheral surface can be extended from the opening end on one end side of the cylindrical portion to the inner back surface on the other end side to be closed. Then, when the cap is mounted in a state where the inner peripheral surface of the cylindrical portion is in close contact with the outer peripheral surface of the tip nozzle by fitting the cylindrical portion from the opening end to the tip nozzle, the state in which the cap is mounted Then, the inner peripheral surface of the cylindrical portion between the tip opening position of the tip nozzle and the opening end of the cylindrical portion is brought into a close contact state, thereby being liquid-tightly sealed.
- This sealed length (seal length) can be set in a range substantially from 2.0 mm to 6.0 mm.
- the seal length can be set in a range substantially from 3.0 mm to 6.0 mm.
- the seal length is shortened in order to prevent early breakage of the vacuum decompression tendency described later. It will be necessary.
- the seal length is substantially 3.0 mm as described above.
- a short range such as the range from 1 to 6.0 mm
- the vacuum decompression tendency is immediately destroyed, and the suction force for the filling chemical solution is extinguished.
- the occurrence of stringing can be more reliably avoided, and even if stringing occurs, the stringing can be prevented. Almost at the same time as or before the destruction of the vacuum depressurization tendency, it can be eliminated at an early stage, and the stringing can be suppressed to the minimum.
- a part or all of the inner hole of the tip nozzle may be formed to have a hole diameter within the hole diameter range.
- the diameter can be reduced in the length range from 0.3 mm to 3.0 mm from the distal end opening position to the proximal end side to form the hole diameter range. If the range of diameter reduction is less than 0.3 mm, there is a possibility that the proof stress tends to be insufficient with respect to the pressure when the filling chemical in the barrel is pushed out.
- the above-mentioned hole diameter range is set. It can be realized.
- the filled chemical solution is aspirated by adhering to the cap side at the initial stage of pulling out the cap.
- the tip opening of the tip nozzle into a small hole diameter ranging from 0.1 mm to 1.0 mm, the diameter of the filled chemical solution to be sucked can be made extremely thin corresponding to the hole diameter of the tip opening. can do.
- the filling chemical solution is a high-viscosity chemical solution, the attached filling chemical solution is immediately interrupted as the cap is further pulled out, and the occurrence of stringing can be avoided.
- the thread when removing the cap when the prefilled syringe is used. It is possible to avoid the occurrence of inconvenience due to the occurrence of stringing by avoiding the possibility of occurrence of stringing. And even if the prefilled syringe is configured using hyaluronic acid with high viscosity as described above as a chemical solution, it avoids the possibility of stringing when removing the cap and prevents the occurrence of inconvenience due to stringing Will be able to.
- the syringe of the present invention can be reliably manufactured. Furthermore, by forming in the hole diameter range from 0.3 mm to 3.0 mm from the tip opening position to the base end side, while realizing the demand for male-luer taper on the outer peripheral surface of the tip nozzle The formation of an excessively thick part can be avoided. As a result, the above-described hole diameter range can be reliably realized in a state where inconveniences associated with the synthetic resin molding are avoided, and the occurrence of stringing according to the present invention can be avoided.
- FIG. 5 is a view corresponding to FIG. 4 in a state where the cap of FIG. 4 is attached to the distal end portion of the syringe.
- 6A is a view corresponding to FIG. 4 in a state where the cap is slightly pulled out from the state of FIG. 5
- FIG. 6B is a view of FIG. 4 in a state where the cap is completely removed from the state of FIG.
- FIG. 8A and 8B are partially enlarged cross-sectional views for explaining conventional inconveniences, in which FIG. 8A shows a state where a tip nozzle is sealed with a cap, and FIG. 8B shows a state from the state of FIG. A slightly pulled out state is shown.
- FIG. 9 (a) is a partially enlarged cross-sectional view for explaining the conventional inconvenience, and FIG. 9 (a) shows a state where stringing has occurred when the cap is completely pulled out from the state of FIG. 8 (b).
- FIG. 9B shows the state of the tip nozzle after the stringing is cut from the state of FIG.
- 1, 2, and 3 show a syringe according to an embodiment of the present invention, where 2 is a barrel that is a syringe barrel of the syringe 1, 3 is a gasket, 4 is a plunger rod, and 5 is a finger grip. (finger-grip), 6 is a cap for sealing.
- the barrel 2 is formed of a transparent plastic (synthetic resin), and a tip nozzle 21 and a luer lock part 22 (both see FIG. 2 and FIG. 3) are formed on the tip side of the barrel 2, while the barrel 2 A base end opening 23 (see FIG. 3) and a base end flange 24 projecting to the outer peripheral side of the base end opening 23 are formed on the base end side.
- the cap 6 is detachably attached to the tip nozzle 21 and the luer lock portion 22, and the finger grip 5 is detachably attached to the base flange 24 from the side.
- the front end side of the barrel 2 has a double cylinder structure by a front end nozzle 21 and a luer lock portion 22, and the cap 6 is externally fitted in close contact with the front end nozzle 21 communicating with the inside of the barrel 2. While the tip opening is sealed in a liquid-tight manner, the outer peripheral surface of the luer lock portion 22 is covered.
- the detailed structure on the tip side of the barrel 2 will be described later.
- the gasket 3 is formed of, for example, rubber, is closely fitted into the barrel 2 from the base end opening 23 of the barrel 2, and slides in the barrel 2 by being pushed and pulled by a plunger rod 4 described later. ing.
- a plurality of ribs 31, 31,... That are slightly enlarged in diameter are integrally formed on the outer peripheral surface of the gasket 3, and each of the ribs 31 is in liquid-tight contact with the inner peripheral surface of the barrel 2.
- the chemical solution contained in the barrel 2 on the tip side from the point 3 is blocked so as not to leak.
- the gasket 3 is formed with a recess 32 (see FIG. 3) that is open on the base end side of the barrel 2 and has a thread groove on the inner peripheral surface.
- the thread portion 42 of the plunger rod 4 is formed in the recess 32.
- the gasket 3 is integrally coupled to the tip of the plunger rod 4.
- the plunger is configured in a state where the plunger rod 4 and the gasket 3 are integrated with each other.
- a chemical chamber 25 in which a chemical solution is stored is defined.
- the plunger rod 4 includes a rod body 41 having a substantially cross-shaped cross section, for example, a screw portion 42 that protrudes from the distal end position of the rod body 41 toward the distal end side of the barrel 2, and a periphery from the proximal end position of the rod body 41.
- disc portions 44 and 45 are provided at the distal end position of the rod main body 41 and an intermediate position that is spaced a predetermined distance from the distal end position to the proximal end side.
- the disk portion 44 at the tip end has an outer diameter that can cover and abut the substantially entire back surface of the gasket 3, and the gasket 3 is coupled to the threaded portion 42 to support the gasket 3 from the back surface and thereby move the plunger rod.
- the pressing force from 4 can be transmitted uniformly to the gasket 3.
- the outer diameter of the disk portion 45 is smaller than the inner diameter of the barrel 2 by a minute amount that is a minimum amount within a range in which the disk 2 can be moved forward and backward, and the outer diameter of the cruciform frame constituting the rod body 41.
- the diameter is set to be larger by a predetermined amount than the outer diameter of the virtual arc connecting the outer peripheral edges.
- a portion protruding so as to have a larger diameter than the outer diameter of the rod main body 41 abuts against a hole edge 521 (described later) of the finger grip 5 to prevent the plunger rod 4 from moving to the drawing side. Pulling out from the barrel 2 is prevented.
- the recess 451 (see FIG. 1 or FIG. 2) is formed by cutting out a part of the outer peripheral edge of the disk portion 45 into a concave shape, and through the recess 451, the base end side and the distal end side in the barrel 2 are formed. A predetermined sterilizing gas is circulated between them.
- the concave portion 451 communicates between the substantially sealed space sandwiched between the disk portions 44 and 45 in the barrel 2 and the inside of the barrel 2 communicated with the outside through the base end opening 23 for sterilization.
- Gas for example, hydrogen peroxide gas
- the finger grip 5 has a grip portion 511 and 511 protruding from the grip body 51 on both wings so as to protrude from both sides of the base end flange 24 of the barrel 2, thereby forming a finger-hanging portion during an injection operation by the syringe 1.
- the grip body 51 has a hole 52 that passes through the center of the grip body 51 and into which the base end flange 24 of the barrel 2 is fitted.
- the base end flange 24 can communicate with the hole 52 and accommodate the base end flange 24 therein.
- a concave groove portion 53 is provided.
- the inner diameter of the hole edge 521 on the base end side with respect to the hole edge 52 of the hole portion 52 with the groove 53 interposed therebetween is equal to the outer diameter of the rod body 41 of the plunger rod 4, and It is set smaller than the outer diameter, and the hole edge 522 on the front end side is set to be substantially equal to the outer diameter of the barrel 2. Then, the finger grip 5 is fixed to the barrel 2 by fitting the proximal end flange 24 of the barrel 2 from the side, and the proximal end opening 23 is narrowed by the hole edge 521 on the proximal end side. Thereby, the movement of the plunger rod 4 is allowed.
- the tip nozzle 21 constitutes an inner cylinder portion having a double cylinder structure.
- the tip nozzle 21 extends to the tip side along the central axis X to a position that protrudes a predetermined amount from the luer lock portion 22 of the barrel 2 to the tip side, and its outer peripheral surface 214 forms a male luer taper portion. It is supposed to be.
- the hole diameter d (see FIG. 4) at the position of the tip opening 211 of the tip nozzle 21 is set to have a predetermined small diameter. That is, the hole diameter d is substantially 0.1 mm to 1.0 mm, preferably 0.4 mm to 1.0 mm, or 0.5 mm to 1.0 mm, more preferably 0.4 mm.
- the limit value on the small diameter side is mainly from a manufacturing viewpoint, and the limit value on the large diameter side is mainly from a functional viewpoint.
- the tip nozzle 21 in forming the tip nozzle 21 together with the barrel 2 by synthetic resin molding, it is difficult to stably and accurately form the hole diameter d below 0.1 mm, and it is less than 0.4 mm or 0.5 mm. Even if it is less than that, it will still be difficult to form stably and accurately in a mass production system.
- the hole diameter d is 1.3 mm or more, the prevention of stringing which the present invention aims at cannot be realized particularly in the case of a filling chemical solution having a high viscosity as described later.
- the above-mentioned indication of the hole diameter range is a hole diameter range from 0.5 mm to 0.7 mm, that is, a hole diameter range of 0.5 mm to 0.7 mm.
- the above and the following mean a substantial range.
- the same range display has the same definition.
- the entire inner hole of the tip nozzle 21 is formed so as to have the hole diameter d, or the male luer taper is formed so as to have the hole diameter d at the position of the tip opening 211.
- the entire inner hole is formed in a tapered shape in parallel with the portion, or the inner hole of the tip nozzle 21 is partially reduced so as to have a hole diameter d, or preferably the inner hole 212 of the inner hole 212 as shown in the figure. Either a part (predetermined range) on the front end side may be formed in the hole diameter d.
- the length range e may be set to a length range substantially 0.3 mm to 3.0 mm from the position of the tip opening 211 on the tip side of the inner hole 212. If the length range e is too short, the bulging portion 213 may break due to the pressure when the filling chemical solution is pushed out. On the other hand, if the length range e is too long, the thick portion increases and the synthetic resin molding increases. The above length range is preferred because it tends to cause sink marks.
- the luer lock portion 22 constitutes an outer cylinder portion surrounding the outer peripheral side of the tip nozzle 21.
- the luer lock portion 22 is formed coaxially with the tip nozzle 21 with respect to the central axis X with an annular space 26 into which a female luer taper portion such as an injection needle enters the outer peripheral side of the tip nozzle 21.
- a female luer taper portion such as an injection needle enters the outer peripheral side of the tip nozzle 21.
- two threads 221 and 221 for luer-locking the female luer taper portion are formed on the inner peripheral surface of the luer lock portion 22.
- convex portions 222, 222,... are formed at positions spaced apart from each other in the circumferential direction at the base end portion on the outer peripheral side of the luer lock portion 22.
- the cap 6 is integrally formed of a synthetic resin such as rubber.
- the cap 6 extends from the periphery of the top wall portion 61 on the distal end side to the proximal end side, and extends from the inner surface of the outer cylinder cover portion 62 to the proximal end side from the inner surface of the top wall portion 61.
- the outer cylinder cover portion 62 and the cap seal portion 63 arranged coaxially have an inner / outer double cylinder structure opened to the base end side.
- the cap seal portion 63 has an inner peripheral surface 631 having a shape that can be in close contact with the outer peripheral surface 214 of the tip nozzle 21 while being elastically compressed by a predetermined amount with respect to the outer peripheral surface 214 of the tip nozzle 21 in a state of being fitted to the tip nozzle 21. It is formed to include an opening end surface 632 that is positioned to extend from the distal end opening 211 of the distal end nozzle 21 to the proximal end side by a predetermined seal length s in a close contact state.
- the seal length s is set to a dimension selected from a range of 2.0 mm to 6.0 mm, preferably a dimension selected from a range of 3.0 mm to 6.0 mm or a range of 3.0 mm to 5.0 mm. . If the seal length s is too short, it is impossible to secure the sealing performance. Conversely, if the seal length s is too long, even if the hole diameter d of the tip nozzle 21 is set to a practical minimum side dimension, it is filled. Since the occurrence of stringing cannot be effectively avoided in relation to the viscosity of the chemical solution, the above range is set.
- the protruding length from the top wall portion 61 along the central axis X of the cap seal portion 63 to the proximal end side is set to be significantly shorter than the protruding length of the distal nozzle 21 toward the distal end side. It is.
- the shape In the mounted state, it is preferable to set the shape so that the inner back surface 633 of the seal cap portion 63 and the tip surface 215 of the tip nozzle 21 are in close contact with each other, but the two are separated by a minute dimension. You may be in the state. The reason is that the sealing of the tip opening 211 is ensured by the close contact of the inner peripheral surface 631 of the seal cap portion 63 with the seal length s with respect to the outer peripheral surface 214 of the tip nozzle 21.
- the cap seal portion 63 is mounted between the outer peripheral surface 634 and the inner peripheral surface of the luer lock portion 22 in the mounted state in which the cap cap portion 63 is mounted on the tip nozzle 21 and the seal cap portion 63 is disposed in the annular space 26. It is formed so that a gap remains.
- the radial width of the annular groove 64 between the seal cap portion 63 and the outer cylinder cover portion 62 is set to be larger than the radial width including the thread 221 of the luer lock portion 22, and in the above mounting state A gap between the groove bottom surface of the annular groove 64 and the front end surface 223 of the luer lock portion 22 and a gap between the inner peripheral surface 621 of the outer cylinder cover portion 62 and the outer peripheral surface 224 of the luer lock portion 22 are formed.
- the size and shape are set so that the annular space 26 communicates with the outside even in the above-described mounting state. The maintenance of this communication state is ensured by the following means.
- a plurality of hemispherical protrusions 65, 65,... Formed on the inner peripheral surface of the outer cylinder cover portion 62 so as to protrude from positions separated from each other in the circumferential direction are provided with the luer lock portion 22 in the mounted state.
- An arrow-shaped portion 67 (see FIG. 2) is integrally formed in a convex shape on the tip surface of the top wall portion 61.
- the arrow-shaped portion 67 is provided to guide and display to the user that the user can easily remove the cap 6 by rotating it in the direction of the arrow when the cap 6 is removed.
- the process up to shipping as a prefilled syringe using the above syringe will be briefly explained.
- the individual sterilization process the barrel 2, gasket 3, plunger rod 4, finger grip 5, and cap 6 as components are individually subjected to sterilization such as high-temperature steam sterilization.
- the chemical solution filling / assembling process the chemical solution chamber 25 is filled with a chemical solution by, for example, the vacuum filling method with the cap 6 and the gasket 3 assembled to the barrel 2, and then the plunger rod 4 is inserted to connect the tip to the gasket 3.
- the finger grip 5 is attached to the proximal flange 24 to complete the prefilled syringe (see the state shown in FIG. 1).
- the prefilled syringe after filling with the chemical solution was sealed in a packaging body such as a blister container or a gas permeable packaging bag in the packaging process, and hydrogen peroxide gas or the like was used in a state of packaging in the packaging body. Perform a final sterilization step.
- the viscosity is 1,000 mPa ⁇ s to 60,000 mPa ⁇ s.
- high-viscosity chemical solutions include hyaluronic acid preparations.
- a hyaluronic acid preparation sodium hyaluronate obtained by a microbial fermentation method, or sodium hyaluronate obtained by extraction from a chicken crest (chicken crown), a vitreous body or an umbilical cord of a cow eye, Alternatively, it is a solution prepared by dissolving in a solution for injection such as physiological saline.
- the size of the liquid ball Q (see FIG. 6B) remaining in the tip opening 211 of the tip nozzle 21 in a state where the cap 6 is completely removed can be significantly reduced as the tip opening 211 is reduced in diameter. it can. That is, the presence of the liquid ball Q to be exposed to the external space can also be reduced in proportion to the square of the diameter reduction ratio of the hole diameter as compared with the liquid ball Q1 in the case of FIG. 9B.
- the cap 6 is pulled out, the cap 6 is pulled out from the barrel 2 while rotating in the direction of the arrow of the arrow-shaped portion 67, whereby the cap 6 can be pulled out smoothly and easily.
- a rapid expansion of the gap space K can be prevented, and the appearance of the vacuum decompression tendency can be moderated to reduce the degree of suction of the filling chemical M. This can contribute to avoiding the occurrence of stringing.
- this invention is not limited to the said embodiment, Various other embodiments are included. That is, in the said embodiment, although the lure lock part 22 was provided in the front end side of the barrel 2, and the cap 6 was provided with the outer cylinder cover part 62 which covers this luer lock part 22, although not restricted to this, The barrel may be configured without the luer lock portion 22, and the cap may be configured without the outer cylinder cover portion 62. This is because the gist of the present invention lies in each configuration of the tip nozzle 21 and the seal cap portion 63 in the above embodiment.
- the hole diameter D is 1.5 mm, 1.3 mm, 1.0 mm, 0.7 mm, 0.6 mm, over the length range e (see FIG. 4) on the distal end side of the inner hole 212 from the distal opening 211.
- the seal part length S of the cap seal part 63 is 8.0 mm, 6.0 mm, 4.5 mm, 3.0 mm, 2. Five types of 0 mm were produced.
- the pre-filled syringe is fixed to the tension / compression tester so that the cap is on the lower side, and the cap is pulled downward at a speed of 1000 mm / min using a dedicated jig, and the yarn at the time of pulling is removed.
- the presence or absence of the occurrence of stringing was visually confirmed, and the stringing that could be visually confirmed was regarded as the occurrence of stringing, and those that could not be visually confirmed were regarded as the occurrence of stringing.
- the reason why such a cap is arranged on the lower side is that a situation in which stringing is most likely to occur, that is, the worst usage situation is assumed.
- Figure 7 shows a table summarizing the test results.
- n / N (n and N are both integers)
- n is the number of occurrences of stringing
- N is the number of tests under the same conditions (10 in this test example).
- N / N indicates the number of occurrences of stringing with respect to the total number of tests of 10, respectively. For example, “1/10” indicates that the number of occurrences of stringing was 1 in 10 tested, and the remaining 9 did not generate stringing.
- the hole diameter d is 0.5 mm, and is substantially within a range of 2.0 mm or more at 7.0 mm or less, or 2.0 mm or more at 6.0 mm or less. It is considered that the occurrence of stringing can be effectively avoided by selecting a combination with the seal length s in the range of.
- the seal has a hole diameter d of 0.6 mm or 0.7 mm and a range of substantially 5.0 mm or less and 2.0 mm or more. It is considered that the occurrence of stringing can be effectively avoided by selecting a combination with the length s.
- the hole diameter D is 1.0 mm
- the occurrence of stringing is 3 out of 10 when the seal length S is 2.0 mm and 3.0 mm
- the seal length S was 6.0 mm
- the occurrence of stringing increased to 8 out of 10 and the stringing occurred in all 10 of the seal lengths S having 8.0 mm. Therefore, when 1.0 mm is selected as the hole diameter d (see FIG. 4), selecting a combination with a seal length s that is substantially within a range of 3.0 mm or less and 2.0 mm or more may cause stringing. It is considered necessary to avoid it.
Abstract
Description
なお、本発明は上記実施形態に限定されるものではなく、その他種々の実施形態を包含するものである。すなわち、上記実施形態では、バレル2の先端側にルアーロック部22を備え、キャップ6がこのルアーロック部22をカバーする外筒カバー部62を備えたものを示したが、これに限らず、バレルとして上記のルアーロック部22のないもので構成し、キャップとして上記の外筒カバー部62のないもので構成してもよい。本発明の本旨は、上記実施形態における先端ノズル21とシールキャップ部63との各構成にあるからである。
3 ガスケット
6 キャップ
21 先端ノズル
23 基端開口
25 薬液充填室
63 シールキャップ部(筒状部)
211 先端ノズルの先端開口
212 先端ノズルの内孔
213 先端ノズルの膨出部
214 先端ノズルの外周面
631 シールキャップ部の内周面
632 シールキャップ部の開口端面(開口端)
633 シールキャップ部の内奥面
d 孔径
s シール長さ
Claims (29)
- 先端側に突出して開口する先端ノズルを有する合成樹脂製のバレルと、上記先端ノズルに装着されることによりその先端ノズルの先端開口を密閉するキャップと、上記バレルの基端開口から内嵌されることによりそのバレルの基端側を密閉するガスケットとを備えた注射器であって、
上記先端ノズルの少なくともその先端開口位置における内孔の孔径が、実質的に0.1mmから1.0mmまでの孔径範囲に設定されている
ことを特徴とする注射器。 - 請求項1に記載の注射であって、
上記先端ノズルに装着されたキャップと、上記バレル内に内嵌されたガスケットとにより密封されたバレル内に、1,000mPa・sから60,000mPa・sまでの範囲の粘度を有する薬液が充填されている、注射器。 - 請求項2に記載の注射器であって、
上記先端ノズルの内孔の一部又は全部が上記孔径範囲内の孔径になるように形成されている、注射器。 - 請求項3に記載の注射器であって、
上記先端ノズルの内孔は、上記先端開口位置から基端側に0.3mmから3.0mmまでの長さ範囲に亘り縮径されて上記孔径範囲に形成されている、注射器。 - 請求項2に記載の注射器であって、
上記キャップは上記先端ノズルに外嵌される筒状部を備え、この筒状部は一端側の開口端から内周面が他端側の内奥面まで延びて閉鎖され、この筒状部をその開口端から先端ノズルに外嵌させることにより筒状部の内周面が先端ノズルの外周面に密着した状態でキャップが装着されるように構成され、
このキャップが装着された状態で先端ノズルの先端開口位置から筒状部の開口端までの間の上記筒状部の内周面が密着状態になることにより液密にシールされるシール長さが実質的に2.0mmから6.0mmまでの範囲に設定されている、注射器。 - 請求項5に記載の注射器であって、
上記先端ノズルの内孔の一部又は全部が上記孔径範囲内の孔径になるように形成されている、注射器。 - 請求項6に記載の注射器であって、
上記先端ノズルの内孔は、上記先端開口位置から基端側に0.3mmから3.0mmまでの長さ範囲に亘り縮径されて上記孔径範囲に形成されている、注射器。 - 請求項5に記載の注射であって、
上記シール長さが実質的に3.0mmから6.0mmまでの範囲に設定されている、注射器。 - 請求項8に記載の注射器であって、
上記先端ノズルの内孔の一部又は全部が上記孔径範囲内の孔径になるように形成されている、注射器。 - 請求項9に記載の注射であって、
上記先端ノズルの内孔は、上記先端開口位置から基端側に0.3mmから3.0mmまでの長さ範囲に亘り縮径されて上記孔径範囲に形成されている、注射器。 - 請求項1に記載の注射器であって、
上記内孔の孔径が0.5mmから1.0mmまでの孔径範囲に設定されている、注射器。 - 請求項11に記載の注射であって、
上記先端ノズルに装着されたキャップと、上記バレル内に内嵌されたガスケットとにより密封されたバレル内に、1,000mPa・sから60,000mPa・sまでの範囲の粘度を有する薬液が充填されている、注射器。 - 請求項12に記載の注射器であって、
上記先端ノズルの内孔の一部又は全部が上記孔径範囲内の孔径になるように形成されている、注射器。 - 請求項13に記載の注射器であって、
上記先端ノズルの内孔は、上記先端開口位置から基端側に0.3mmから3.0mmまでの長さ範囲に亘り縮径されて上記孔径範囲に形成されている、注射器。 - 請求項12に記載の注射器であって、
上記キャップは上記先端ノズルに外嵌される筒状部を備え、この筒状部は一端側の開口端から内周面が他端側の内奥面まで延びて閉鎖され、この筒状部をその開口端から先端ノズルに外嵌させることにより筒状部の内周面が先端ノズルの外周面に密着した状態でキャップが装着されるように構成され、
このキャップが装着された状態で先端ノズルの先端開口位置から筒状部の開口端までの間の上記筒状部の内周面が密着状態になることにより液密にシールされるシール長さが実質的に2.0mmから6.0mmまでの範囲に設定されている、注射器。 - 請求項15に記載の注射器であって、
上記先端ノズルの内孔の一部又は全部が上記孔径範囲内の孔径になるように形成されている、注射器。 - 請求項16に記載の注射器であって、
上記先端ノズルの内孔は、上記先端開口位置から基端側に0.3mmから3.0mmまでの長さ範囲に亘り縮径されて上記孔径範囲に形成されている、注射器。 - 請求項15に記載の注射であって、
上記シール長さが実質的に3.0mmから6.0mmまでの範囲に設定されている、注射器。 - 請求項18に記載の注射器であって、
上記先端ノズルの内孔の一部又は全部が上記孔径範囲内の孔径になるように形成されている、注射器。 - 請求項19に記載の注射であって、
上記先端ノズルの内孔は、上記先端開口位置から基端側に0.3mmから3.0mmまでの長さ範囲に亘り縮径されて上記孔径範囲に形成されている、注射器。 - 請求項2~請求項10のいずれか1つの請求項、又は、請求項12~請求項20のいずれか1つの請求項に記載の注射器であって、
上記薬液がヒアルロン酸製剤である、注射器。 - 請求項1又は請求項11に記載の注射器であって、
上記先端ノズルの内孔の一部又は全部が上記孔径範囲内の孔径になるように形成されている、注射器。 - 請求項22に記載の注射器であって、
上記先端ノズルの内孔は、上記先端開口位置から基端側に0.3mmから3.0mmまでの長さ範囲に亘り縮径されて上記孔径範囲に形成されている、注射器。 - 請求項1又は請求項11に記載の注射器であって、
上記キャップは上記先端ノズルに外嵌される筒状部を備え、この筒状部は一端側の開口端から内周面が他端側の内奥面まで延びて閉鎖され、この筒状部をその開口端から先端ノズルに外嵌させることにより筒状部の内周面が先端ノズルの外周面に密着した状態でキャップが装着されるように構成され、
このキャップが装着された状態で先端ノズルの先端開口位置から筒状部の開口端までの間の上記筒状部の内周面が密着状態になることにより液密にシールされるシール長さが実質的に2.0mmから6.0mmまでの範囲に設定されている、注射器。 - 請求項24に記載の注射器であって、
上記先端ノズルの内孔の一部又は全部が上記孔径範囲内の孔径になるように形成されている、注射器。 - 請求項25に記載の注射器であって、
上記先端ノズルの内孔は、上記先端開口位置から基端側に0.3mmから3.0mmまでの長さ範囲に亘り縮径されて上記孔径範囲に形成されている、注射器。 - 請求項24に記載の注射であって、
上記シール長さが実質的に3.0mmから6.0mmまでの範囲に設定されている、注射器。 - 請求項27に記載の注射器であって、
上記先端ノズルの内孔の一部又は全部が上記孔径範囲内の孔径になるように形成されている、注射器。 - 請求項28に記載の注射であって、
上記先端ノズルの内孔は、上記先端開口位置から基端側に0.3mmから3.0mmまでの長さ範囲に亘り縮径されて上記孔径範囲に形成されている、注射器。
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EP09809860A EP2332601A1 (en) | 2008-08-25 | 2009-08-24 | Syringe |
US13/060,764 US20120109072A1 (en) | 2008-08-25 | 2009-08-24 | Syringe |
JP2010526687A JP5618440B2 (ja) | 2008-08-25 | 2009-08-24 | 注射器 |
CN200980133494.8A CN102131538B (zh) | 2008-08-25 | 2009-08-24 | 注射器 |
AU2009285115A AU2009285115A1 (en) | 2008-08-25 | 2009-08-24 | Syringe |
CA2735146A CA2735146A1 (en) | 2008-08-25 | 2009-08-24 | Syringe |
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EP (1) | EP2332601A1 (ja) |
JP (1) | JP5618440B2 (ja) |
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US20120109072A1 (en) | 2012-05-03 |
CN102131538A (zh) | 2011-07-20 |
CA2735146A1 (en) | 2010-03-04 |
TW201023929A (en) | 2010-07-01 |
AU2009285115A1 (en) | 2010-03-04 |
TWI505848B (zh) | 2015-11-01 |
KR20110060909A (ko) | 2011-06-08 |
EP2332601A1 (en) | 2011-06-15 |
JPWO2010024209A1 (ja) | 2012-01-26 |
KR101647163B1 (ko) | 2016-08-09 |
CN102131538B (zh) | 2014-04-16 |
JP5618440B2 (ja) | 2014-11-05 |
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