Syringe Adapter

Abstract

To provide an adapter for a syringe which is excellent in strength, can easily inject a highly viscous injection drug by easily pushing a plunger to the end, has excellent infection prevention properties, and is suitable for medical treatment. [Solution] When attached to a syringe 1, the device comprises a flange abutment portion 11 that abuts against the flange on the finger hook side 1f1 of the flange 1f, a finger hook portion 12 that is spaced apart from the flange abutment portion and can be used to hook a finger in place of the finger hook side of the flange, and an attachment hole 14 that is attached to the outer periphery of the tubular portion 1b of the syringe between the flange abutment portion and the finger hook portion and has an attachment / detachment opening 13 that allows the tubular portion of the syringe to be elastically attached and detached from the lateral direction relative to the tubular portion of the syringe between the flange abutment portion and the finger hook portion, and the flange abutment portion, finger hook portion and attachment hole are formed by a single block body, and the area between the flange abutment portion and the finger hook portion is solid from the flange abutment portion to the finger hook portion except for the attachment hole.

Description

[Technical Field]

[0001] The present invention relates to a syringe adapter, and more particularly to a syringe adapter that allows easy injection of highly viscous injection drugs containing hyaluronic acid or the like. [Background technology]

[0002] Conventionally, techniques such as those described in Patent Documents 1 to 4 have been known.

[0003] <Patent Document 1> Japanese Utility Model Laid-Open Publication No. 53-134596 Patent Document 1 states: "The purpose of installing the acupressure assisting support tool 4 is to eliminate unnecessary force and make it easier to adjust the force, thereby reducing variations in the amount of die bond agent dispensed and improving work efficiency" (full text of the document, page 2, paragraph 2). "A syringe characterized by having a support for assisting acupressure attached to the outer periphery of the cylinder" (Claim 1 of the same document) is stated.

[0004] However, the acupressure assist support device 4 attached to this syringe "has a through-hole 4b and an inner diameter portion 4c so that the needle 3 does not interfere with the outer diameter portion of the cylinder 1 when attached" (full text of the same specification, page 2, third line from the bottom to the end), so the acupressure assist support device 4 is attached to the syringe by passing the needle 3 through the through-hole 4b and inserting the tip of the cylinder 1 into the inner diameter portion 4c. Therefore, when the acupressure-assistance support tool 4 is attached to the syringe, it may come into contact with the needle 3. Since this prior art is intended for die-bonding agents, even if the acupressure-assistance support tool 4 comes into contact with the needle 3, it is not thought to be a problem from the perspective of infection prevention. However, in medical treatment involving the injection of highly viscous injectable drugs containing hyaluronic acid, etc., strict measures must be taken to prevent infection. In other words, the acupressure assisting support tool 4 of Patent Document 1 is not suitable for medical use.

[0005] <Patent Document 2> Japanese Utility Model Laid-Open Publication No. 55-180538 Patent Document 2 states: "The purpose is to make the injection procedure extremely easy in order to minimize the accumulation of fatigue" (full text of the document, page 2, paragraph 3), "A syringe finger hook characterized by a base barrel (3) fitted onto a syringe barrel (4), at least one holder portion (2), (2') being provided on the outer periphery of the base barrel (3), and the base barrel (3) being detachably fitted onto the syringe barrel (4)" (claims in the utility model registration in the same document) is stated.

[0006] However, the base cylinder (3) of the finger hook (1) of this syringe is a simple cylindrical body with no openings on the outer periphery, so in order to fit the finger hook (1) onto the syringe barrel (4), the syringe barrel (4) must be inserted into the base cylinder (3). Therefore, when this finger rest (1) is fitted onto the syringe barrel (4), there is a risk of it coming into contact with the tip of the syringe barrel (4) or, if a needle is attached, with the needle, and therefore it is not suitable for medical use. Furthermore, the holder portions (2), (2') are provided at a distance in the axial direction of the syringe barrel from the rear end of the base barrel portion (3) that abuts against the flange of the syringe barrel (4). However, these are not made of a block body, and the space between the rear end of the base barrel portion (3) and the holder portions (2), (2') is not solid, which may result in insufficient strength.

[0007] <Patent Document 3> Japanese Patent Application Laid-Open No. 8-731 Patent Document 3 states: The objective was to make it easier to hook a finger onto the flange of a glass cylinder, while also making it less likely to break even when strong force is applied. "A flange piece 11 with a larger diameter than the flange 5 of the cylinder 2 and a holding piece 18 with an attachment hole 19 slightly larger than the cylinder body 3 are made integrally from a hard material, an annular step 14 that fits almost tightly onto the flange 5 is formed at the end of the flange piece 11 side of the attachment hole 19, a circumferential protrusion 20 that circumscribes the cylinder body 3 is formed on the attachment hole 19, and an opening 21 with a width slightly smaller than the semicircular length of the cylinder body 3 opens the entire length of the attachment hole 19 to one side, so that the syringe is fitted onto the cylinder body 3 from the side and administration can be performed by hooking a finger on the flange piece 11." is stated (Summary of the same literature).

[0008] This auxiliary tool can be fitted into the tube body 3 from the side, and is therefore suitable for medical use in terms of infection prevention.

[0009] However, this auxiliary device is made of a hard material and is composed of a flange piece 11 with a larger diameter than the flange 5 of the cylinder barrel 2 and a holding piece 18 with an attachment hole 19 slightly larger than the cylinder body 3, and is designed so that the administration operation is performed by hooking a finger onto the large-diameter flange piece 11 instead of the flange 5 of the cylinder barrel 2.Since the axial positions of the flange 5 of the cylinder barrel 2 and the large-diameter flange piece 11 are approximately the same, this has the drawback that during the administration operation, it becomes difficult to press the head 7 of the piston rod 8 as it approaches the flange piece 11 (and therefore the flange 5 of the cylinder barrel 2).

[0010] <Patent Document 4> Utility Model Registration No. 3006419 FIG. 5 of Patent Document 4 shows an auxiliary tool for a syringe cylinder, which has almost the same purpose and basic structure as the tool shown in Patent Document 3. [Prior art documents] [Patent documents]

[0011] [Patent Document 1] Japanese Utility Model Application Publication No. 53-134596 [Patent Document 2] Utility Model Publication No. 55-180538 [Patent Document 3] Japanese Patent Application Publication No. 8-731 [Patent Document 4] Utility Model Registration No. 3006419 Summary of the Invention [Problem to be solved by the invention]

[0012] The problem that the present invention aims to solve is to provide a syringe adapter that is strong, allows the plunger to be easily pushed all the way in to facilitate injection of highly viscous injectable drugs, and is excellent at preventing infection and is suitable for medical use. [Means for solving the problem]

[0013] In order to solve the above problems, the syringe adapter of the present invention comprises: An adapter that can be detachably attached to a syringe having an injection needle attached to a tip end, a flange that can be hooked with a finger at a rear end, and a plunger inserted into a cylindrical portion, a flange abutment portion that abuts against the flange on the finger hook side of the flange when attached to the syringe; a finger hook portion that is provided at a distance from the flange abutment portion in the axial direction of the cylindrical portion of the syringe and that can be used to hook fingers in place of the finger hook side of the flange; a cylindrical mounting hole that is mounted on the outer periphery of the cylindrical portion of the syringe between the flange abutment portion and the finger hook, the mounting hole having a detachment opening that allows elastic attachment and detachment to the cylindrical portion of the syringe in a direction perpendicular to the axial direction of the cylindrical portion of the syringe between the flange abutment portion and the finger hook, The flange abutment portion, finger hook portion, and mounting hole are formed by a single block body, and the area between the flange abutment portion and the finger hook portion other than the mounting hole is solid from the flange abutment portion to the finger hook portion.

[0014] With the above-described configuration, the syringe adapter provides the following advantages. When using a syringe to perform an injection, the cylindrical portion of the syringe is inserted into the cylindrical mounting hole of the adapter in a direction perpendicular to the axial direction of the cylindrical portion of the syringe, utilizing its elasticity, and the adapter can be attached to the syringe by abutting the flange abutment of the adapter against the finger hook side of the flange of the syringe. Therefore, even if an injection needle is attached to the tip of the syringe, there is almost no risk of the adapter coming into contact with the injection needle when the adapter is attached, which is excellent in terms of infection prevention. The adapter is provided with a finger hook portion that can be used to hook the fingers in place of the finger hook side of the flange on the syringe, so that the person giving the injection (e.g., a doctor) can perform the injection by hooking, for example, the index finger and middle finger on the finger hook portion of the adapter and pushing the plunger with the thumb (hallucinum). Furthermore, this adapter not only has a finger hook spaced apart from the flange abutment in the axial direction of the syringe's cylindrical portion, but also has the flange abutment, finger hook, and mounting hole formed from a single block, and the area between the flange abutment and the finger hook, except for the mounting hole, is solid from the flange abutment to the finger hook, providing excellent strength and allowing the plunger to be easily pushed all the way in. This makes it easy to inject even highly viscous injection drugs.

[0015] As described above, the syringe adapter of the present invention has excellent strength, and by simply pushing the plunger all the way in, it is possible to easily inject highly viscous injectable drugs, and it has the advantage of being excellent at preventing infection and being suitable for medical use.

[0016] In this syringe adapter, The block body is preferably made of soft polyester. This configuration makes it suitable for boiling sterilization, gas sterilization, and gamma ray sterilization.

[0017] In this syringe adapter, The block body may be configured to be C-shaped when viewed in the axial direction of the mounting hole, and the outer peripheral surface of the portion facing the attachment / detachment opening may be a curved surface that is recessed toward the attachment / detachment opening.

[0018] With this configuration, even though the syringe adapter is block-shaped, when the cylindrical portion of the syringe is inserted into the cylindrical mounting hole of the adapter using its elasticity in a direction perpendicular to the axial direction of the cylindrical portion of the syringe, the block body is more likely to elastically deform, making it easier to attach and detach the adapter to and from the syringe.

[0019] In this syringe adapter, The distance between the flange contact portion and the finger hook portion is preferably 20 mm or more and 65 mm or less.

[0020] This configuration provides the following effects. If the distance between the flange contact portion and the finger hook is less than 20 mm, the strain on the fingers when the plunger is pushed all the way will be too great. Conversely, if the distance between the flange contact portion and the finger hook portion exceeds 65 mm, it becomes difficult to hook a finger or, even if a finger is hooked, it becomes difficult to apply force. In contrast, if the distance between the flange abutment portion and the finger hook portion is set to 20 mm or more and 65 mm or less, it becomes easier to hook the finger and apply force from start to finish, and the strain on the finger when pushing the plunger all the way can be reduced.

[0021] In this syringe adapter, The block body may be configured to be point-symmetric when viewed from a direction perpendicular to the axial direction of the cylindrical mounting hole.

[0022] With this configuration, the syringe can be attached without worrying about the front or back, improving usability. [Brief explanation of the drawings]

[0023] [Figure 1] 1A to 1C are diagrams showing an embodiment of a syringe adapter according to the present invention, in which (a) is a plan view, (b) is a front view, and (c) is a right side view. [Figure 2] Usage status illustration. DETAILED DESCRIPTION OF THE INVENTION

[0024] Hereinafter, an embodiment of a syringe adapter (also simply referred to as an adapter) according to the present invention will be described with reference to the drawings. In each drawing, the same or corresponding parts are designated by the same reference numerals.

[0025] As shown in FIGS. 1 and 2, the syringe adapter 10 of this embodiment includes: The adapter is detachably attached to a syringe 1, which has an injection needle 2 attached to its tip, a flange 1f on which a finger can be hooked at its rear end, and a plunger 3 inserted into a cylindrical portion 1b. a flange abutment portion 11 that abuts against the flange 1f at a finger hook side 1f1 of the flange 1f when attached to the syringe 1; a finger hook portion 12 that is provided at a distance from the flange abutment portion 11 in the axial direction of the cylindrical portion 1b of the syringe 1 (the direction of the arrow X1 in FIG. 2), and that can be used to hook a finger in place of the finger hook side 1f1 of the flange 1f; a cylindrical mounting hole (14) that is mounted on the outer periphery of the cylindrical portion (1b) of the syringe (1) between the flange abutment portion (11) and the finger hook portion (12), the mounting hole (14) having an attachment / detachment opening (13) that allows elastic attachment / detachment to / from the cylindrical portion (1b) of the syringe (1) in a direction perpendicular to the axial direction of the cylindrical portion (1b) of the syringe (1) between the flange abutment portion (11) and the finger hook portion (12) (the direction of arrow Y1 in FIG. 1(c)); The flange abutment portion 11, the finger hook portion 12, and the mounting hole 14 are formed by a single block body (10), and the area between the flange abutment portion 11 and the finger hook portion 12, except for the mounting hole 14, is solid from the flange abutment portion 11 to the finger hook portion 12.

[0026] As a result of the above-described configuration, syringe adapter 10 provides the following advantages.

[0027] When performing an injection using the syringe 1, the cylindrical portion 1b of the syringe 1 is inserted into the cylindrical mounting hole 14 of the adapter 10 in a direction perpendicular to the axial direction of the cylindrical portion 1b of the syringe 1 (the direction of arrow Y1 in FIG. 1(c)) by utilizing the elasticity of the adapter 10 itself, and the flange abutment portion 11 of the adapter 10 is abutted against the finger hook side 1f1 of the flange 1f of the syringe 1, thereby allowing the adapter 10 to be attached to the syringe 1. Therefore, even if the injection needle 2 is attached to the tip of the syringe 1, there is almost no risk of the adapter 10 coming into contact with the injection needle 2 when the adapter 10 is attached, which is excellent in terms of infection prevention.

[0028] The adapter 10 is provided with a finger hook portion 12 that can be used to hook the fingers in place of the finger hook side 1f1 of the flange 1f of the syringe 1, so that the person giving the injection (e.g., a doctor) can perform the injection by hooking the index finger F1 and middle finger F2 on the finger hook portion 12 of the adapter 10 as shown in Figure 2, and pushing the plunger 3 with the thumb (hallucinum) F3. In FIG. 2, 3f denotes the flange of the plunger 3, and the imaginary line indicates the state in which the plunger 3 is fully pressed.

[0029] In this adapter 10, not only is finger hook 12 spaced apart from flange abutment 11 in the axial direction (direction of arrow X1) of tubular portion 1b of syringe 1, but flange abutment 11, finger hook 12, and mounting hole 14 are formed from a single block, and the area between flange abutment 11 and finger hook 12, except for mounting hole 14, is solid from flange abutment 11 to finger hook 12, so that adapter 10 has excellent strength and plunger 3 can be easily pushed all the way in. Therefore, even highly viscous injection drugs can be easily injected.

[0030] As described above, the syringe adapter 10 of this embodiment has excellent strength, and by simply pushing the plunger 3 all the way in, it is possible to easily inject highly viscous injectable drugs, and it has the advantage of being excellent in preventing infection and suitable for medical use.

[0031] In addition, the following effects can be obtained: For example, hyaluronic acid syringes are sterilized and require the tip not to be touched before injection to prevent infection, whereas this embodiment allows the adapter to be attached to the syringe from the side, making it easy to avoid touching the syringe tip.The inside of a joint is sterile, and if bacteria or the like enters the joint during injection, it can cause septic arthritis, a serious complication that may require surgery, so strict measures must be taken to prevent infection, but this adapter makes it possible to take the above measures.

[0032] Conversely, when removing the adapter from the syringe, you can simply pull it out in one go in the axial direction of the tip and discard the disposable syringe in the trash. In this case, since the injection has already been performed, there is no need to worry about infection. At this point, the syringe has an exposed needle, so there is a risk of needlestick injury if you try to remove it from the side. However, because the adapter can be pulled out in one go in the axial direction of the tip, this risk can be avoided. Furthermore, the needle is capped when the adapter is attached, so there is no risk of needlestick injury. Needlestick injuries also require strict measures to prevent, as the needle becomes a source of infection after it has been inserted into a patient. However, as mentioned above, this adapter is easy to remove from the syringe because the adapter can be pulled out in one go in the axial direction of the tip and the disposable syringe can be thrown in the trash.

[0033] The block body (10) in this embodiment is made of soft polyester. This configuration makes it suitable for boiling sterilization, gas sterilization, and gamma ray sterilization. In other words, the main use is in semi-clean areas where it is washed each time, but it can also be sterilized and brought into clean areas. Furthermore, because the adapter 10 is a block made of the above-mentioned material, it can be used even in non-sterile fields, and as mentioned above, it is easy to take precautions against infection and needlestick injuries, and it can be easily washed and reused immediately.

[0034] As shown in FIG. 1(c), the block body (10) is C-shaped when viewed from the axial direction of the mounting hole 14, and the outer peripheral surface 15 of the portion facing the detachable opening 13 is a curved surface that is concave toward the detachable opening 13.

[0035] When configured in this manner, even though the syringe adapter 10 is block-shaped, when the cylindrical portion 1b of the syringe 1 is inserted into the cylindrical mounting hole 14 of the adapter 10 using its elasticity in a direction perpendicular to the axial direction of the cylindrical portion 1b of the syringe 1 (direction of arrow Y1), the block body is more likely to elastically deform, making it easier to attach and detach the adapter 10 to and from the syringe 1.

[0036] The distance L (see FIG. 1(b)) between the flange contact portion 11 and the finger hook portion 12 is preferably 20 mm or more and 65 mm or less.

[0037] This configuration provides the following effects. When pressing the plunger 3, it is easy to press at first, but as you press it further, the strain on your thumb increases. If the distance L between the flange contact portion 11 and the finger hook portion 12 is less than 20 mm, the burden on the fingers (F1, F2, F3) when the plunger 3 is pushed all the way will be large. Conversely, if the distance L between the flange contact portion 11 and the finger hook portion 12 exceeds 65 mm, it becomes difficult to hook a finger or, even if a finger is hooked, it becomes difficult to apply force. In addition, there is a high risk of interference with the needle 2.

[0038] In contrast, if the distance L between the flange abutment portion 11 and the finger hook portion 12 is set to 20 mm or more and 65 mm or less, it becomes easier to hook the finger and apply force from start to finish, and the burden on the finger when the plunger 3 is pushed all the way through can be reduced.

[0039] As shown in FIG. 1(b), the block body (10) is point-symmetrical with respect to a center point C1 when viewed from a direction perpendicular to the axial direction of the cylindrical mounting hole 14.

[0040] With this configuration, adapter 10 can be attached to syringe 1 without having to worry about the front-to-rear direction, improving usability.

[0041] The block body (10) of this embodiment is also symmetrical with respect to the center line C2 when viewed from a direction perpendicular to the axial direction of the cylindrical mounting hole 14.

[0042] Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the gist of the present invention. For example,

[0043] The syringe adapter 10 of this embodiment can be made to have shapes and sizes that correspond to various known syringes. As mentioned above, soft polyester is preferable as the material, but any material can be used as long as it is suitable for boiling sterilization, gas sterilization, and gamma ray sterilization, has elasticity suitable for attachment to a syringe, and allows an appropriate amount of finger pressure to be applied. [Explanation of symbols]

[0044] 1: Syringe 10: Syringe adapter (block) 11: Flange contact part 12: Finger rest 13: Removal opening 14: Mounting hole

Claims

1. The adapter is detachably attached to a syringe (1) having an injection needle (2) attached to its tip, a flange (1f) on which a finger can be hooked at its rear end, and a plunger (3) inserted into a cylindrical portion (1b), a flange abutment portion (11) that abuts against the flange (1f) on the finger hook side (1f1) of the flange (1f) when attached to the syringe (1); a finger hook portion (12) that is provided at a distance from the flange abutment portion (11) in the axial direction of the cylindrical portion (1b) of the syringe (1) and that can be used to hook a finger in place of the finger hook side (1f1) of the flange (1f); a cylindrical mounting hole (14) mounted on the outer periphery of the cylindrical portion (1b) of the syringe (1) between the flange abutment portion (11) and the finger hook portion (12), the mounting hole (14) having an attachment / detachment opening (13) that enables elastic attachment / detachment to / from the cylindrical portion (1b) of the syringe (1) in a direction perpendicular to the axial direction of the cylindrical portion (1b) of the syringe (1) between the flange abutment portion (11) and the finger hook portion (12); The flange abutment portion (11), finger hook portion (12), and mounting hole (14) are formed from a single block body, and the area between the flange abutment portion (11) and the finger hook portion (12) other than the mounting hole (14) is filled with the same material as the flange abutment portion (11) and the finger hook portion (12) from the flange abutment portion (11) to the finger hook portion (12), forming a solid state with no gaps or spaces.

2. In claim 1, The syringe adapter is characterized in that the block body is made of soft polyester.

3. In claim 1, The block body is C-shaped when viewed in the axial direction of the mounting hole (14), and the outer peripheral surface (15) of the portion facing the attachment / detachment opening (13) is a curved surface that is always concave toward the attachment / detachment opening (13) from the flange abutment portion (11) to the finger hook portion (12).

4. In claim 1, The syringe adapter is characterized in that the distance (L) between the flange abutment portion (11) and the finger hook portion (12) is 20 mm or more and 65 mm or less.

5. In claim 1, The syringe adapter is characterized in that the block body is point-symmetrical when viewed from a direction perpendicular to the axial direction of the cylindrical mounting hole (14).

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