WO2011108575A1 - 医療器具 - Google Patents
医療器具 Download PDFInfo
- Publication number
- WO2011108575A1 WO2011108575A1 PCT/JP2011/054723 JP2011054723W WO2011108575A1 WO 2011108575 A1 WO2011108575 A1 WO 2011108575A1 JP 2011054723 W JP2011054723 W JP 2011054723W WO 2011108575 A1 WO2011108575 A1 WO 2011108575A1
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- WIPO (PCT)
- Prior art keywords
- needle
- double
- ended needle
- ended
- tip
- 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
- A61M5/31—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
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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
- A61M5/285—Syringe ampoules or carpules, i.e. ampoules or carpules provided with a needle with sealing means to be broken or opened
- A61M5/288—Syringe ampoules or carpules, i.e. ampoules or carpules provided with a needle with sealing means to be broken or opened by piercing without internal pressure increase
-
- 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
- A61M5/34—Constructions for connecting the needle, e.g. to syringe nozzle or needle hub
- A61M5/348—Constructions for connecting the needle, e.g. to syringe nozzle or needle hub snap lock, i.e. upon axial displacement of needle assembly
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61J—CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
- A61J1/00—Containers specially adapted for medical or pharmaceutical purposes
- A61J1/14—Details; Accessories therefor
- A61J1/20—Arrangements for transferring or mixing fluids, e.g. from vial to syringe
- A61J1/2003—Accessories used in combination with means for transfer or mixing of fluids, e.g. for activating fluid flow, separating fluids, filtering fluid or venting
- A61J1/2006—Piercing means
- A61J1/201—Piercing means having one piercing end
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61J—CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
- A61J1/00—Containers specially adapted for medical or pharmaceutical purposes
- A61J1/14—Details; Accessories therefor
- A61J1/20—Arrangements for transferring or mixing fluids, e.g. from vial to syringe
- A61J1/2003—Accessories used in combination with means for transfer or mixing of fluids, e.g. for activating fluid flow, separating fluids, filtering fluid or venting
- A61J1/2006—Piercing means
- A61J1/2013—Piercing means having two piercing ends
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61J—CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
- A61J1/00—Containers specially adapted for medical or pharmaceutical purposes
- A61J1/14—Details; Accessories therefor
- A61J1/20—Arrangements for transferring or mixing fluids, e.g. from vial to syringe
- A61J1/2003—Accessories used in combination with means for transfer or mixing of fluids, e.g. for activating fluid flow, separating fluids, filtering fluid or venting
- A61J1/2048—Connecting means
- A61J1/2051—Connecting means having tap means, e.g. tap means activated by sliding
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61J—CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
- A61J1/00—Containers specially adapted for medical or pharmaceutical purposes
- A61J1/14—Details; Accessories therefor
- A61J1/20—Arrangements for transferring or mixing fluids, e.g. from vial to syringe
- A61J1/2096—Combination of a vial and a syringe for transferring or mixing their contents
Definitions
- the present invention relates to a medical instrument.
- a prefilled syringe pre-filled with a liquid such as a heparin solution is known (for example, see Patent Document 1).
- the prefilled syringe described in Patent Document 1 includes a syringe outer cylinder having a mouth through which the liquid is discharged, and a cap that seals the mouth of the syringe outer cylinder in a liquid-tight manner.
- the cap is first removed from the mouth of the syringe outer cylinder, and then, for example, an injection needle can be connected to the mouth from which the cap has been removed.
- An object of the present invention is to provide a medical device that can reliably prevent a cover member covering a double-ended needle from unintentionally leaving the double-ended needle.
- a medical instrument comprising a liquid injector having a mouth portion through which a liquid passes at a tip portion, and a double-ended needle assembly attached to the mouth portion of the liquid injector,
- the double-ended needle assembly includes a double-ended needle having a needle tube having a sharp needle tip at both ends and a hub for supporting the needle tube;
- the mouth portion is attached to the mouth portion, and the mouth portion is liquid-tightly sealed, and has a piercing portion that can be pierced by the needle tip on the proximal end side of the needle tube.
- a support member that is movably supported along the axial direction;
- a cover that has a fixing portion that is fixed to the double-ended needle, covers the needle tip on the distal end side of the needle tube in a state in which the fixing portion is fixed, and operates to move the double-ended needle along its axial direction With members, In the initial state, in the double-ended needle, the needle tip on the distal end side of the needle tube is covered with the cover member, and the needle tip on the proximal end side of the needle tube is not pierced with respect to the piercing portion.
- the double-ended needle has the needle tip on the proximal end side of the needle tube with the piercing portion.
- the medical instrument characterized in that the needle tube and the liquid injection device communicate with each other, and the cover member is released from the fixing of the fixing portion with respect to the double-ended needle and can be detached from the double-ended needle. It is.
- the communication between the needle tube and the liquid injection tool is performed at the same timing as or earlier than the release of the fixing of the cover member to the double-ended needle.
- the hub is formed of a cylindrical body
- the cover member is configured by a cylindrical body arranged outside the hub, and has a fixing protrusion that functions as the fixing portion, which is formed to protrude from an inner peripheral portion thereof.
- the fixing protrusion engages with the side wall of the hub in the initial state, thereby being fixed to the double-ended needle and pressed outwardly to a part of the liquid injection tool in the usable state. And away from the hub sidewall, thereby disengaging the hub sidewall.
- the side wall of the cover member is cantilevered at the tip, and a connecting portion that connects a plurality of small pieces arranged along the circumferential direction and the base ends of the adjacent small pieces. It is preferable that the fixing protrusion is disposed at the connecting portion.
- the medical device of the present invention further includes positioning means for defining the position in the axial direction with respect to the support member in each of the initial state and the usable state of the double-ended needle.
- the hub is formed of a cylindrical body
- the support member is composed of a cylinder disposed inside the hub
- the positioning means is provided with a positioning protrusion protruding on one side wall of the hub and the support member, and a first engagement with which the positioning protrusion is engaged in the initial state. It is preferable that it is comprised by the part and the 2nd engaging part which is provided in the base end side rather than the said 1st engagement, and the said protrusion for positioning engages in the said usable state.
- the distance until the piercing portion of the needle tip on the proximal end side of the needle tube is pierced is the same as or longer than the distance until the fixing portion is released. Shorter than that.
- the fixing projection has a base end inclined toward the inside.
- the other side wall has an inclined portion whose inclination angle increases in the proximal direction between the first engaging portion and the second engaging portion. Preferably it is formed.
- the piercing portion is constituted by a plate-like elastic body.
- the liquid injection tool is preferably a syringe.
- FIG. 1 is a longitudinal cross-sectional view sequentially illustrating the operation process of the medical instrument of the present invention.
- FIG. 2 is a longitudinal cross-sectional view sequentially illustrating the operation process of the medical instrument of the present invention.
- FIG. 3 is a longitudinal cross-sectional view sequentially illustrating the operation process of the medical instrument of the present invention.
- FIG. 4 is a longitudinal cross-sectional view sequentially illustrating the operation process of the medical instrument of the present invention.
- FIG. 5 is a perspective view showing a cover member and a double-ended needle included in the medical instrument of the present invention.
- 6 is a longitudinal sectional perspective view of the cover member and the double-ended needle shown in FIG.
- FIGS. 1 to 4 are longitudinal sectional views sequentially illustrating the operation process of the medical device of the present invention
- FIG. 5 is a perspective view illustrating a cover member and a double-ended needle included in the medical device of the present invention
- FIG. 6 is a longitudinal sectional perspective view of a cover member and a double-ended needle shown in FIG.
- the right side in FIGS. 1 to 4 is referred to as “base end”
- the left side is referred to as “tip”
- the lower side in FIGS. 5 and 6 is referred to as “base end”
- the upper side is referred to as “base end”.
- a medical device 10 shown in FIGS. 1 to 4 includes a prefilled syringe (hereinafter simply referred to as “syringe”) 20 that is a liquid injection tool, and a double-ended needle assembly 1 that is attached to a mouth portion 201 of the syringe 20. Yes.
- syringe prefilled syringe
- needle assembly 1 double-ended needle assembly 1 that is attached to a mouth portion 201 of the syringe 20.
- the syringe 20 has a syringe outer cylinder 202 having a bottomed cylindrical shape.
- the syringe outer cylinder 202 is filled with the liquid Q in advance.
- a tubular mouth portion 201 is formed in the bottom portion (tip portion) 203 of the syringe outer cylinder 202 so as to protrude in the tip direction.
- the liquid Q can pass through the mouth portion 201.
- the liquid Q is not particularly limited, and various chemical solutions can be used.
- the double-ended needle assembly 1 shown in FIGS. 1 to 3 includes a double-ended needle 2, a support member 3 that supports the double-ended needle 2, and a cover member 4 that covers the double-ended needle 2.
- the double-ended needle assembly 1 is assembled by overlapping a cover member 4, a double-ended needle 2 and a support member 3 in this order from the distal end side (see FIG. 1).
- the double-ended needle 2 has a needle tube 5 and a hub 6 that supports the middle of the needle tube 5 in the longitudinal direction.
- the needle tube 5 has a sharp tip needle tip (tip tip needle tip) 51 at the tip and a sharp proximal needle tip (base needle tip) 52 at the base end.
- tip tip needle tip sharp tip needle tip
- base needle tip base needle tip
- needle tube 5 Although it does not specifically limit as a constituent material of the needle tube 5, for example, various metal materials, such as stainless steel, are mentioned.
- the hub 6 is formed of a bottomed cylindrical member.
- a tubular support portion 62 is formed on the bottom portion 61 of the hub 6 so as to protrude in the distal direction.
- the needle tube 5 can be supported and fixed by inserting and fitting the support tube 62 through the support portion 62.
- the side wall 63 of the hub 6 has a base end portion of a plurality of pieces (four pieces in this embodiment) and a base end portion of the adjacent small pieces 64 connected to each other. It is comprised with the connection part 65 to do.
- the small pieces 64 are arranged at equiangular intervals around the hub 6 axis.
- Each of the small pieces 64 is cantilevered at the tip 641 of the side wall 63 at the tip 641.
- a slit 643 is formed in each small piece 64 from the base end 642 to the middle. Thereby, each small piece 64 can be elastically deformed with its tip 641 as a fixed end (see FIGS. 1 to 4).
- Each of the small pieces 64 is formed with a slit 643 in the illustrated configuration, but is not limited thereto, and the slit 643 may be omitted.
- the connecting portion 65 can be omitted.
- the small pieces 64 connected to the connecting portion 65 and the small pieces 64 not connected to the connecting portion 65 may be alternately arranged around the axis of the hub 6.
- Each connecting portion 65 has an arch shape, and a positioning projection 66 is formed on the inner periphery thereof.
- the positioning projection 66 is a part that functions as a part of positioning means described later.
- the positioning projection 66 can be displaced in the vertical direction in FIGS. 1 to 4 when the small piece 64 is elastically deformed.
- the double-ended needle 2 having such a configuration is supported by a support member 3.
- the support member 3 is a member that can support the double-ended needle 2 so as to be movable along the axial direction thereof, and is attached to the mouth portion 201 of the syringe 20.
- the support member 3 includes a member main body 7 having a bottomed cylindrical shape, and a piercing portion 8 installed on the bottom 71 of the member main body 7.
- the member main body 7 is disposed concentrically on the inner side of the hub 6 of the double-ended needle 2 and attached to the mouth portion 201 of the syringe 20.
- the member body 7 is preferably fixed to the mouth portion 201 of the syringe 20.
- the fixing method is not particularly limited, and examples thereof include a method by fitting, adhesion (adhesion with an adhesive or a solvent), a method by fusion (thermal fusion, high frequency fusion, ultrasonic fusion, etc.), and the like. It is done. In this case, it is preferable that the fixing position of the member main body 7 with respect to the syringe 20 is the base end 72 of the member main body 7.
- the side wall 73 of the member body 7 is formed with a concave portion 731 that functions as a first engaging portion with which each positioning projection 66 of the hub 6 of the double-ended needle 2 is engaged in the initial state.
- the concave portion 731 has a ring shape formed along the circumferential direction of the side wall 73 of the member main body 7.
- each positioning projection 66 can be engaged with the recess 731 in a lump.
- the double-ended needle 2 defines the position in the axial direction with respect to the support member 3 in the initial state, and thus unintentional movement is prevented.
- each positioning projection 66 of the double-ended needle 2 engages with the base end 72 which is a part on the base end side with respect to the concave portion 731 of the member main body 7.
- the base end 72 functions as a second engaging portion with which each positioning projection 66 is engaged in a usable state.
- Each positioning projection 66 is engaged with the base end 72 of the member main body 7, whereby the double-ended needle 2 is regulated in the axial position with respect to the support member 3 in the usable state. Movement is prevented.
- the positioning protrusions 66 of the double-ended needle 2 and the recesses 731 and the base end 72 of the member main body 7 are respectively in the initial state and the usable state.
- Positioning means for defining an axial position with respect to the support member 3 is configured.
- the second engaging portion of the positioning means is the base end 72 of the member main body 7 in the configuration shown in FIG. 3, but is not limited to this, for example, the first engagement of the side wall 73 of the member main body 7.
- a concave portion formed between the concave portion 731 functioning as a joint portion and the base end 72 may be used.
- an inclined portion 732 is formed on the side wall 73 of the member main body 7 at a portion between the recess 731 and the base end 72.
- the inclination angle of the inclined portion 732 increases toward the proximal direction.
- a through hole 711 is formed in the bottom 71 of the member body 7. And the part by the side of the base end of the through-hole 711 has the internal diameter expanded, and is the piercing part installation part 712 where the piercing part 8 is installed.
- the constituent material of the member main body 7 can be used.
- the constituent material of the member main body 7 and the constituent material of the hub 6 may be the same or different.
- the piercing part 8 installed in the piercing part installation part 712 can liquid-tightly seal the mouth part 201 of the syringe 20 in the initial state (mounted state) shown in FIG. Thereby, it can prevent reliably that the liquid Q leaks from the mouth part 201 unwillingly.
- the piercing unit 8 is pierced by the proximal needle point 52 of the double-ended needle 2 until it becomes ready for use as shown in FIG. Thereby, the needle tube 5 of the double-ended needle 2 and the syringe outer cylinder 202 of the syringe 20 communicate with each other, so that the liquid Q can be discharged through the needle tube 5.
- Such a piercing portion 8 is formed of an elastic body having a disk shape. As a result, the piercing portion 8 can reliably seal the mouth portion 201 of the syringe 20 in the initial state, and can be easily and reliably pierced by the proximal needle tip 52 of the double-ended needle 2 in the usable state.
- the elastic material constituting the piercing portion 8 is not particularly limited.
- various rubber materials such as natural rubber, butyl rubber, isoprene rubber, butadiene rubber, styrene-butadiene rubber, silicone rubber, polyurethane,
- examples include various thermoplastic elastomers such as polyester, polyamide, olefin, and styrene, and mixtures thereof.
- the double-ended needle 2 is supported by the support member 3 so as to be movable along the axial direction thereof.
- the double-ended needle 2 is moved by gripping and operating the cover member 4 attached to the outside of the double-ended needle 2.
- the cover member 4 is composed of a member having a bottomed cylindrical shape. On the bottom 41 of the cover member 4, a tubular portion 42 is formed that has a tubular shape protruding in the distal direction. The distal end 421 of the tubular portion 42 is closed, and the distal end needle tip 51 of the needle tube 5 of the double-ended needle 2 can be covered (see FIGS. 1 and 6). As a result, the tip needle tip 51 is prevented from being exposed, and thus erroneous puncture by the tip needle tip 51 can be reliably prevented.
- the side wall of the cover member 4 is composed of a plurality (four in the present embodiment) of small pieces 43 and a connecting portion 44 that connects base ends of adjacent small pieces 43. Has been.
- the small pieces 43 are arranged at equiangular intervals around the axis of the cover member 4.
- Each small piece 43 is cantilevered at the bottom 41 of the cover member 4 at its tip 431.
- a slit 433 is formed in each small piece 43 from the base end 432 to the middle thereof.
- each small piece 43 can be elastically deformed with its tip 431 as a fixed end (see FIGS. 1 to 3).
- Each of the small pieces 43 is formed with the slit 433 in the illustrated configuration, but is not limited thereto, and the slit 433 may be omitted.
- the connecting portion 44 can be omitted.
- the small pieces 43 connected to the connecting portion 44 and the small pieces 43 not connected to the connecting portion 44 may be alternately arranged around the axis of the cover member 4.
- Each connecting portion 44 has an arch shape, and a fixing protrusion 45 that functions as a fixing portion that is fixed to the double-ended needle 2 protrudes from the inner periphery thereof.
- the fixing projection 45 can be displaced in the vertical direction in FIGS. 1 to 3 when the small piece 43 is elastically deformed.
- each of the fixing protrusions 45 can engage with the base end 631 of the side wall 63 of the hub 6 of the double-ended needle 2.
- the cover member 4 is fixed to the double-ended needle 2 and is reliably prevented from being detached from the double-ended needle 2.
- the cover member 4 can be moved along the axial direction of the double-ended needle 2 together.
- each of the fixing protrusions 45 faces the outer peripheral portion 204 of the syringe 20 outward.
- the double-ended needle 2 is separated from the proximal end 631 of the hub 6.
- the engagement between each fixing protrusion 45 and the base end 631 of the hub 6 is released, so that the cover member 4 can be detached from the double-ended needle 2.
- inclined portions 451 are formed at the base end portions of the respective fixing projections 45, respectively.
- the inclined portion 451 is a portion in which the height of the fixing projection 45 is gradually reduced in the proximal direction, that is, the portion is inclined inward. As described above, when the outer peripheral portion 204 of the syringe 20 presses the fixing projection 45, the outer peripheral portion 204 can push up the inclined portion 451 (see FIG. 2), and thus the pressing is facilitated.
- each fixing projection 45 is arranged at the same position around each axis as each positioning projection 66 of the double-ended needle 2. Is preferred.
- the constituent material of the cover member 4 is not particularly limited, and for example, the constituent material of the hub 6 described above can be used. In this case, the constituent material of the cover member 4 and the constituent material of the hub 6 may be the same or different.
- the double-ended needle assembly 1 is attached to the mouth portion 201 of the syringe 20 in advance.
- the cover member 4 of the double-ended needle 2 is fixed, and the tip needle tip 51 of the needle tube 5 is covered with the cover member 4.
- the double-ended needle 2 is positioned at the position where each positioning projection 66 of the hub 6 is engaged with the recess 731 of the support member 3.
- the proximal needle point 52 of the needle tube 5 is not pierced with respect to the piercing portion 8 of the support member 3.
- the unpierced state can be reliably maintained until the cover member 4 is operated.
- the proximal needle tip 52 of the needle tube 5 of the double-ended needle 2 is in the middle of piercing the piercing portion 8 of the support member 3 (or starting to pierce).
- the fixing of the cover member 4 to the double-ended needle 2 has not yet been released.
- the operation in the proximal direction of the cover member 4 is stopped halfway, and the cover member 4 is moved to the distal end.
- the cover member 4 is prevented from being detached from the double-ended needle 2.
- the needle tube 5 of the double-ended needle 2 completely pierces the piercing portion 8 and the needle tube 5 and the syringe 20 communicate with each other because the cover member 4 is fixed to the double-ended needle 2. This is done at an earlier timing (or the same timing) than the release.
- the hole formed in the piercing part 8 by the piercing of the needle tube 5 has a self-occlusion property because the piercing part 8 is made of an elastic material.
- the cover member 4 is in a usable state where the cover member 4 is further moved in the proximal direction (see FIG. 3).
- each fixing protrusion 45 of the cover member 4 rides on the outer peripheral portion 204 of the syringe 20 and is pressed outward by the outer peripheral portion 204.
- the fixing protrusions 45 are separated from the base end 631 of the hub 6 of the double-ended needle 2, and the fixing of the cover member 4 to the double-ended needle 2 is released. With this release, the cover member 4 can be detached from the double-ended needle 2.
- each positioning projection 66 of the hub 6 gets over the inclined portion 732 of the support member 3 and engages with the base end 72. As a result, the double-ended needle 2 is positioned. Therefore, when the cover member 4 is detached, the double-ended needle 2 together with the cover member 4 is pulled in the distal direction and reliably prevented from being detached from the syringe 20. can do.
- the needle tube 5 of the double-ended needle 2 communicates with the syringe 20 in the usable state.
- the double-headed needle assembly 1 is in a state in which the cover member 4 is removed, and the plunger (not shown) of the syringe 20 is operated to inject the liquid Q. Can do.
- the cover member 4 covering the double-ended needle 2 is unintentionally detached from the double-ended needle 2, that is, the needle tube 5 of the double-ended needle 2 penetrates the piercing portion 8.
- the needle tube 5 and the syringe 20 it is possible to reliably prevent the needle tube 5 and the syringe 20 from separating before communicating.
- each part which comprises a medical instrument is a thing of arbitrary structures which can exhibit the same function Can be substituted. Moreover, arbitrary components may be added.
- liquid injection tool a syringe is taken as an example in the above embodiment, but the liquid injection tool is not limited to this, and examples thereof include an infusion bag and a connector attached to one end of a tube.
- the positioning means has a configuration in which the positioning projection is provided on the hub of the double-ended needle, and the first engagement portion and the second engagement are provided on the member main body of the support member.
- the present invention is not limited to this, and a positioning protrusion may be provided on the member main body of the support member, and the first engagement portion and the second engagement portion may be provided on the hub of the double-ended needle. Good.
- the medical instrument of the present invention is a medical instrument comprising a liquid injector having a mouth portion through which a liquid passes at a tip portion, and a double-ended needle assembly attached to the mouth portion of the liquid injector device.
- the needle assembly is attached to the double-ended needle having a needle tube having a sharp needle tip at each end and a hub for supporting the needle tube, and the mouth is liquid-tight in the mounted state.
- a supporting member that seals and has a piercing portion that can be pierced by the needle tip on the proximal end side of the needle tube, and supports the double-headed needle movably along its axial direction;
- a cover member that has a fixed portion to be fixed, covers the needle tip on the tip side of the needle tube in a state in which the fixed portion is fixed, and moves the double-ended needle along its axial direction;
- the double-ended needle has the needle tip on the tip side of the needle tube covered with the cover member.
- the needle tip on the proximal end side of the needle tube is in an unpierced state with respect to the piercing portion, and the cover member is moved from the initial state to the proximal direction along with the double-ended needles.
- the cover member includes the fixing portion. Is released from the double-ended needle and can be detached from the double-ended needle. Therefore, the cover member covering the double-ended needle is unintentionally detached from the double-ended needle, that is, the double-ended needle tube penetrates the piercing portion of the support member attached to the mouth of the liquid injector, and the needle tube And the liquid injector can be reliably prevented from separating before communicating with each other. As a result, it is possible to reliably prevent the liquid injector from being inadvertently usable, thereby eliminating the problem that the liquid injector has to be used or discarded. can do. Therefore, the medical device of the present invention has industrial applicability.
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Abstract
Description
先端部に液体が通過する口部を有する液体注入具と、該液体注入具の前記口部に装着される両頭針組立体とを備える医療器具であって、
前記両頭針組立体は、両端にそれぞれ鋭利な針先を有する針管と、該針管を支持するハブとを有する両頭針と、
前記口部に装着され、その装着された状態で前記口部を液密に封止し、前記針管の基端側の前記針先で刺通可能な刺通部を有し、前記両頭針をその軸方向に沿って移動可能に支持する支持部材と、
前記両頭針に対し固定される固定部を有し、該固定部が固定された状態で前記針管の先端側の前記針先を覆うとともに、前記両頭針をその軸方向に沿って移動操作するカバー部材とを備え、
初期状態では、前記両頭針は、前記針管の先端側の前記針先が前記カバー部材に覆われ、前記針管の基端側の前記針先が前記刺通部に対し未刺通状態となっており、
前記初期状態から前記カバー部材を前記両頭針ごと基端方向に移動操作した使用可能状態になるまでの間に、前記両頭針は、前記針管の基端側の前記針先が前記刺通部を刺通して、前記針管と前記液体注入具とが連通し、前記カバー部材は、前記固定部の前記両頭針に対する固定が解除され、該両頭針からの離脱が可能となることを特徴とする医療器具である。
前記カバー部材は、前記ハブの外側に配置された筒体で構成され、その内周部に突出形成された、前記固定部として機能する固定用突部を有し、
前記固定用突部は、前記初期状態で前記ハブの側壁に係合し、これにより、前記両頭針に対し固定され、前記使用可能状態で前記液体注入具の一部に外側に向かって押圧されて、前記ハブの側壁から離間し、これにより、該ハブの側壁との係合が解除されるのが好ましい。
前記支持部材は、前記ハブの内側に配置された筒体で構成されており、
前記位置決め手段は、前記ハブおよび前記支持部材のうちの一方の側壁に突出した位置決め用突部と、他方の側壁に設けられ、前記初期状態で位置決め用突部が係合する第1の係合部と、前記第1の係合よりも基端側に設けられ、前記使用可能状態で前記位置決め用突部が係合する第2の係合部とで構成されているのが好ましい。
図1~図4は、それぞれ、本発明の医療器具の操作過程を順に示す縦断面図、図5は、本発明の医療器具が備えるカバー部材および両頭針を示す斜視図、図6は、図5に示すカバー部材および両頭針の縦断面斜視図である。なお、以下では、説明の都合上、図1~図4中の右側を「基端」、左側を「先端」と言い、図5および図6中の下側を「基端」、上側を「先端」と言う。
液体Qとしては、特に限定されず、各種薬液を用いることができる。
針管5は、先端に鋭利な先端針先(先端側の針先)51と、基端に鋭利な基端針先(基端側の針先)52とを有している。両頭針組立体1では、図1に示す使用前の初期状態で、先端針先51がカバー部材4に覆われ、基端針先52が、後述する支持部材3の刺通部8に対し未刺通状態となっている。また、図3、図4に示す使用可能状態で、カバー部材4を取り外して先端針先51が露出し、基端針先52が支持部材3の刺通部8を刺通した状態となる。
カバー部材4の底部41には、先端方向に突出した管状をなす管状部42が形成されている。管状部42は、その先端421が閉塞しており、両頭針2の針管5の先端針先51を覆うことができる(図1、図6参照)。これにより、先端針先51が露出するのが防止され、よって、先端針先51による誤穿刺を確実に防止することができる。
Claims (6)
- 先端部に液体が通過する口部を有する液体注入具と、該液体注入具の前記口部に装着される両頭針組立体とを備える医療器具であって、
前記両頭針組立体は、両端にそれぞれ鋭利な針先を有する針管と、該針管を支持するハブとを有する両頭針と、
前記口部に装着され、その装着された状態で前記口部を液密に封止し、前記針管の基端側の前記針先で刺通可能な刺通部を有し、前記両頭針をその軸方向に沿って移動可能に支持する支持部材と、
前記両頭針に対し固定される固定部を有し、該固定部が固定された状態で前記針管の先端側の前記針先を覆うとともに、前記両頭針をその軸方向に沿って移動操作するカバー部材とを備え、
初期状態では、前記両頭針は、前記針管の先端側の前記針先が前記カバー部材に覆われ、前記針管の基端側の前記針先が前記刺通部に対し未刺通状態となっており、
前記初期状態から前記カバー部材を前記両頭針ごと基端方向に移動操作した使用可能状態になるまでの間に、前記両頭針は、前記針管の基端側の前記針先が前記刺通部を刺通して、前記針管と前記液体注入具とが連通し、前記カバー部材は、前記固定部の前記両頭針に対する固定が解除され、該両頭針からの離脱が可能となることを特徴とする医療器具。 - 前記針管と前記液体注入具との連通は、前記カバー部材の前記両頭針に対する固定の解除と同じタイミングまたはそれよりも早いタイミングでなされる請求項1に記載の医療器具。
- 前記ハブは、筒体で構成され、
前記カバー部材は、前記ハブの外側に配置された筒体で構成され、その内周部に突出形成された、前記固定部として機能する固定用突部を有し、
前記固定用突部は、前記初期状態で前記ハブの側壁に係合し、これにより、前記両頭針に対し固定され、前記使用可能状態で前記液体注入具の一部に外側に向かって押圧されて、前記ハブの側壁から離間し、これにより、該ハブの側壁との係合が解除される請求項1に記載の医療器具。 - 前記カバー部材の側壁は、先端が片持支持され、周方向に沿って配置された複数の小片と、隣接する前記小片の基端部同士を連結する連結部とで構成されており、該連結部に前記固定用突部が配置されている請求項3に記載の医療器具。
- 前記両頭針の前記初期状態および前記使用可能状態のそれぞれでの前記支持部材に対する前記軸方向の位置を規定する位置決め手段を備える請求項1に記載の医療器具。
- 前記ハブは、筒体で構成され、
前記支持部材は、前記ハブの内側に配置された筒体で構成されており、
前記位置決め手段は、前記ハブおよび前記支持部材のうちの一方の側壁に突出した位置決め用突部と、他方の側壁に設けられ、前記初期状態で位置決め用突部が係合する第1の係合部と、前記第1の係合よりも基端側に設けられ、前記使用可能状態で前記位置決め用突部が係合する第2の係合部とで構成されている請求項5に記載の医療器具。
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EP11750684.0A EP2543354A4 (en) | 2010-03-05 | 2011-03-02 | Medical device |
US13/496,527 US20120179109A1 (en) | 2010-03-05 | 2011-03-02 | Medical device |
CN2011800036900A CN102481230A (zh) | 2010-03-05 | 2011-03-02 | 医疗器具 |
JP2012503206A JPWO2011108575A1 (ja) | 2010-03-05 | 2011-03-02 | 医療器具 |
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US (1) | US20120179109A1 (ja) |
EP (1) | EP2543354A4 (ja) |
JP (1) | JPWO2011108575A1 (ja) |
CN (1) | CN102481230A (ja) |
WO (1) | WO2011108575A1 (ja) |
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JPWO2014049797A1 (ja) * | 2012-09-27 | 2016-08-22 | テルモ株式会社 | プレフィルドシリンジ用外筒、プレフィルドシリンジ用穿刺具、プレフィルドシリンジおよびプレフィルドシリンジ用外筒包装体 |
JPWO2014049781A1 (ja) * | 2012-09-27 | 2016-08-22 | テルモ株式会社 | プレフィルドシリンジ用外筒、プレフィルドシリンジ用穿刺具、プレフィルドシリンジおよびプレフィルドシリンジ用外筒包装体 |
JP2017515585A (ja) * | 2014-05-12 | 2017-06-15 | サノフイ | 起動機構を有する薬剤送達デバイス |
JP2017518799A (ja) * | 2014-05-12 | 2017-07-13 | サノフイ | 薬剤送達デバイス用の起動機構および薬剤送達デバイス |
JP2018518298A (ja) * | 2015-06-22 | 2018-07-12 | サノフィ−アベンティス・ドイチュラント・ゲゼルシャフト・ミット・ベシュレンクテル・ハフツング | キャップが引き抜かれるとき穿孔するカートリッジを有する薬物送達デバイス |
JP2018535059A (ja) * | 2015-11-27 | 2018-11-29 | サノフィ−アベンティス・ドイチュラント・ゲゼルシャフト・ミット・ベシュレンクテル・ハフツング | 薬剤注射デバイス |
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JP2020044374A (ja) * | 2014-05-12 | 2020-03-26 | サノフイSanofi | 薬剤送達デバイス用の起動機構および薬剤送達デバイス |
JP2017518799A (ja) * | 2014-05-12 | 2017-07-13 | サノフイ | 薬剤送達デバイス用の起動機構および薬剤送達デバイス |
JP2017515585A (ja) * | 2014-05-12 | 2017-06-15 | サノフイ | 起動機構を有する薬剤送達デバイス |
US11826552B2 (en) | 2014-05-12 | 2023-11-28 | Sanofi-Aventis Deutschland Gmbh | Activating mechanism for a medicament delivery device and medicament delivery device |
JP2018518298A (ja) * | 2015-06-22 | 2018-07-12 | サノフィ−アベンティス・ドイチュラント・ゲゼルシャフト・ミット・ベシュレンクテル・ハフツング | キャップが引き抜かれるとき穿孔するカートリッジを有する薬物送達デバイス |
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Also Published As
Publication number | Publication date |
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EP2543354A1 (en) | 2013-01-09 |
US20120179109A1 (en) | 2012-07-12 |
JPWO2011108575A1 (ja) | 2013-06-27 |
EP2543354A4 (en) | 2017-10-11 |
CN102481230A (zh) | 2012-05-30 |
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