JP7100875B2 - Auxiliary tool for intradermal injection - Google Patents

Description

The present invention relates to an intradermal injection aid for assisting an intradermal injection in which a drug solution is injected into the dermis.

Conventionally, various intradermal injection aids to be attached to a syringe to assist intradermal injection have been proposed.

Intradermal injection is a delicate operation in which the tip of an injection needle is inserted into a thin dermis located shallowly from the surface of the skin to inject a drug solution into the dermis. Specifically, a person who performs intradermal injection tilts the injection needle with respect to the skin, for example, about 15 degrees, and slowly punctures the tip of the injection needle into the skin. At that time, in order to stabilize the puncture position (depth) when puncturing so that the injection needle can smoothly enter the skin, the skin is stretched and injected in a smoothly fixed state (stretched and fixed state). Puncture the needle. Under such circumstances, an adapter as an auxiliary tool for intradermal injection having a function of stretching the skin as disclosed in Patent Document 1 has also been proposed.

The adapter of Patent Document 1 is inserted with a main body that holds the syringe slidably in the puncture direction, a locking portion for locking the distal end that is the tip of the needle hub of the syringe, and an injection needle. The skin is stretched as an extension of the first skin contact surface on which the needle opening is formed, the second skin contact surface located on the distal end side of the needle opening, and the second skin contact surface. It is provided with a distal contact surface for allowing.

When using the adapter of Patent Document 1, the user brings the second skin contact surface into contact with the skin with the skin extended at the distal contact surface, and in this state, the injection needle is far away. Slide the syringe toward the distal contact surface until the end of the position contacts the locking part of the adapter. Then, the tip of the injection needle is punctured into the skin in a state of protruding from the opening for the needle by a predetermined length, and the tip is located in the dermis. As described above, the adapter of Patent Document 1 can reach the tip of the injection needle into the dermis with the skin stretched, and even a user who is not skilled in intradermal injection can accurately inject intradermally. It is said that you can do it.

Japanese Patent No. 5213950

By the way, intradermal injection is characterized in that the injected drug solution causes the skin around the tip of the injection needle to swell and form a bulge.
However, in the above-mentioned conventional adapter, the distal end of the injection needle is extended with the distal contact surface extending the portion where the injection needle is pierced, and the second skin contact surface is in contact with the extended portion. Slide the syringe toward the distal contact surface until it touches the locking part of the adapter. That is, in the conventional adapter, the portion where the bulge is formed is extended by the distal contact surface, and the second skin contact surface is in contact with the adapter. Therefore, in the above-mentioned conventional adapter, there is a problem that the formation of the bulging portion is hindered by the extension of the skin and the presence of the second skin contact surface, and the bulging portion is not formed well.

Therefore, in view of such circumstances, it is an object of the present invention to provide an intradermal injection assisting tool that easily punctures the skin with an injection needle and does not easily inhibit the formation of a bulge.

The intradermal injection assisting tool according to the present invention is an intradermal injection assisting tool that is attached to a syringe to assist intradermal injection.
With an injection needle,
It is equipped with a main body that holds the injection needle so that the axial direction of the injection needle is aligned with the puncture direction.
The main body is
An abutting surface that is inclined with respect to the axial direction so that the injection needle forms a predetermined angle with respect to the skin and the tip of the injection needle abuts on the skin while being pierced by the dermis, and at least a part of the injection needle is an injection needle. A contact surface that is arranged on one side in the radial direction of the needle and is arranged on the proximal end side of the tip of the injection needle.
An extension surface that comes into contact with the skin to extend the skin when the injection needle is pierced, at least a part of which is arranged on the other side in the radial direction and is separated from the tip of the injection needle in the axial direction. With an extended surface arranged in
The extended surface is inclined so as to stand upright on the other side in the radial direction from the contact surface with respect to the axial direction.

When using the intradermal injection assisting tool having such a configuration, the user attaches the intradermal injection assisting tool to the syringe, arranges the contact surface toward the skin side, and makes the extended surface on the skin. Press and stretch the skin. When the contact surface is laid close to the skin from this state, the tip of the injection needle begins to pierce the extended skin with the extended surface extended. When the contact surface is further laid down, the tip of the injection needle penetrates into the skin, the contact surface comes into contact with the skin with the tip of the injection needle stuck in the skin at a predetermined angle, and the injection needle further moves. It is regulated to be stuck in the skin. Here, since the extension surface is inclined so as to stand upright on the other side in the radial direction from the contact surface with respect to the axial direction of the injection needle, the extension surface is in a state where the insertion of the injection needle is restricted. It is in a state away from the skin.

As described above, according to the intradermal injection assisting tool having the above configuration, the injection needle can be pierced with the skin stretched, and after the injection needle is pierced into the skin for a predetermined length, the injection needle can be pierced. Since the skin can be released from the stretched state, it is easy to pierce the skin with an injection needle, and it is difficult to inhibit the formation of a bulge formed on the skin by injecting a drug solution.

As another aspect of the present invention, the intradermal injection assisting tool is an intermediate portion arranged between the contact surface and the extension surface on the other side in the radial direction from the tip of the injection needle, and is used for injection. It has an intermediate part formed in the vicinity of the tip of the needle and has an intermediate part.
The intermediate portion may be formed with a recess recessed in the other side in the radial direction.

According to this configuration, a recess recessed in the other side in the radial direction is formed in the intermediate portion formed in the region near the tip of the injection needle. That is, since the recess is formed at the position corresponding to the position where the bulge is formed so as to avoid the bulge, it is difficult for the skin to come into contact with the main body after the injection needle is punctured, and the formation of the bulge is hindered. It's getting harder to do.

As one aspect of the present invention, the recess may be a through hole penetrating the intermediate portion.

According to this configuration, since the recess is formed as a through hole penetrating the intermediate portion, there is no obstacle that the skin abuts in the direction in which the bulge is formed, and the formation of the bulge is less likely to be hindered. There is.

From the above, according to the present invention, it is possible to provide an auxiliary tool for intradermal injection that makes it easy to puncture the skin with an injection needle and does not easily inhibit the formation of a bulge.

It is a perspective view of the auxiliary tool for intradermal injection which concerns on 1st Embodiment. It is a top view of the auxiliary tool for intradermal injection which concerns on the same embodiment. It is sectional drawing of the auxiliary tool for intradermal injection which concerns on the same embodiment, and is sectional drawing at the position of line III-III of FIG. It is a perspective view of the auxiliary tool for intradermal injection which concerns on the same embodiment, and is the perspective view seen from the bottom surface side. It is a bottom view of the auxiliary tool for intradermal injection which concerns on the same embodiment. It is a back view of the auxiliary tool for intradermal injection which concerns on the same embodiment. It is a front view of the auxiliary tool for intradermal injection which concerns on the same embodiment. It is a right side view of the auxiliary tool for intradermal injection which concerns on the same embodiment. It is a left side view of the auxiliary tool for intradermal injection which concerns on the same embodiment. It is a figure for demonstrating the usage of the intradermal injection assisting tool which concerns on the same embodiment, (a) is a figure of the state before puncture, (b) is a figure in the middle of puncture, (c) is a figure. , The figure shows a state in which the tip of an injection needle is punctured into the skin for a predetermined length and the puncture is completed. It is an enlarged sectional view for demonstrating the state in which a bulge portion was formed. It is a perspective view of the auxiliary tool for intradermal injection which concerns on 2nd Embodiment. It is a top view of the auxiliary tool for intradermal injection which concerns on the same embodiment. It is sectional drawing of the auxiliary tool for intradermal injection which concerns on the same embodiment, and is sectional drawing at the position of XIV-XIV of FIG. It is a perspective view of the auxiliary tool for intradermal injection which concerns on 3rd Embodiment. It is a top view of the auxiliary tool for intradermal injection which concerns on the same embodiment. It is sectional drawing of the auxiliary tool for intradermal injection which concerns on the same embodiment, and is sectional drawing at the position of XVII-XVII of FIG.

Hereinafter, the auxiliary tool for intradermal injection according to the first embodiment of the present invention will be described with reference to the drawings. 1 to 9 are views for explaining the first embodiment, and FIGS. 10 and 11 are views for explaining how to use the subcutaneous injection assisting device.

The intradermal injection assisting tool 1 according to the present embodiment is attached to a syringe S (see FIGS. 10 and 11) to assist intradermal injection. The intradermal injection assisting tool 1 includes an injection needle 2 and a main body 3 that holds the injection needle 2 so that the axial direction of the injection needle 2 is aligned with the puncture direction. That is, the intradermal injection assisting tool 1 is used by being attached to a syringe S not provided with an injection needle 2, and from the syringe S, an injection needle for intradermal administration is attached.

First, a syringe S to which the intradermal injection assisting tool 1 is attached will be described. As shown in FIGS. 10 and 11, the syringe S is connected to the tubular body portion S1 and one end of the body portion S1 in the central axial direction, and is used to discharge the chemical solution M in the syringe S to the outside. It includes a dispensing portion S2 and a plunger S3 inserted into the body portion S1 from the other end of the body portion S1. The dispensing portion S2 is formed so that the dispensing hole S2a, which serves as a passage for the chemical solution M, extends in the direction of the central axis of the body portion S1. When the intradermal injection assisting tool 1 is attached to the syringe S, the injection needle 2 and the body S1 communicate with each other through the injection hole S2a of the injection part S2, and the drug solution M in the body S1 is supplied with the syringe S. It is configured so that it can be injected to the outside via the injection needle 2. When the intradermal injection assisting tool 1 is attached to the syringe S, the central axial direction of the body S1 and the axial direction of the injection needle 2 are aligned with each other.

The injection needle 2 has a tip 21 for pouring out the drug solution M, and a proximal end 22 located on the opposite side of the tip 21 in the axial direction of the injection needle 2. The injection needle 2 is held in the main body 3 so that the tip 21 is exposed to a predetermined length. Hereinafter, the exposed portion of the injection needle 2 may be referred to as an exposed portion 23, and the portion on the base end 22 side of the exposed portion 23 may be referred to as an unexposed portion 24. The tip 21 of the injection needle 2 is cut so that the opening surface formed in the opening 210 is inclined with respect to the axial direction. The injection needle 2 is held in the main body 3 so that the opening surface of the opening 210 faces the other side in the radial direction of the injection needle 2 (so that the opening 210 opens upward in the height direction described later). Has been done. Since the injection needle 2 is used for intradermal injection, it is formed thinner than a normal injection needle.

As shown in FIGS. 1 to 3, the main body 3 holds the injection needle 2 so that the axial direction of the injection needle 2 is aligned with the puncture direction. The main body 3 is in contact with an abutting portion 4 that abuts on the skin T when the injection needle 2 is pierced into the skin T, and an extension portion 5 that extends the skin T when the injection needle 2 is pierced into the skin T. An intermediate portion 6 which is arranged between the portion 4 and the extension portion 5 and connects the contact portion 4 and the extension portion 5, a needle holding portion 7 for holding the injection needle 2, and a syringe mounting where the syringe S is mounted. The portion 8 is provided with a grip portion 9 that the user grips when attaching the intradermal injection assisting tool 1 to the syringe S or when piercing. As will be described later, the user may grip the grip portion 9 or the body portion S1 of the syringe S at the time of puncture.

The main body 3 extends in the lateral direction of the orthogonal vertical and lateral directions, and holds the injection needle 2 so that the tip 21 of the injection needle 2 faces one end side in the lateral direction. Further, the main body 3 holds the injection needle 2 so that the tip 21 of the injection needle 2 protrudes from the lower end side in the height direction orthogonal to the vertical direction and the horizontal direction. The main body 3 of the present embodiment holds the injection needle 2 so that the axial direction of the injection needle 2 is inclined with respect to the lateral direction.

The main body 3 is formed so that the length in the horizontal direction is longer than the length in the vertical direction. In the main body portion 3 of the present embodiment, an extension portion 5, an intermediate portion 6, a contact portion 4, and a syringe mounting portion 8 are arranged side by side in this order from one end side in the lateral direction. The needle holding portion 7 is provided on the upper surface 42 of the contact portion 4, which will be described later. Further, the grip portions 9 are provided on both sides of the syringe mounting portion 8 in the vertical direction.

As shown in FIGS. 3, 10, and 11, the contact portion 4 is formed on the skin T with the injection needle 2 forming a predetermined angle with respect to the skin T and the tip 21 thereof being punctured by the dermis T2. It has an abutting surface 41 inclined with respect to the axial direction of the injection needle 2 so as to abut. The contact portion 4 is formed in a plate shape (thin plate shape) having a predetermined thickness. The contact portion 4 is arranged on the opposite side of the contact surface 41, and has an upper surface 42 facing upward in the height direction and an end surface 43 located on one end side in the lateral direction.

At least a part of the contact surface 41 is arranged on one side in the radial direction of the injection needle 2, and is arranged on the proximal end 22 side of the tip 21 of the injection needle 2. The inclination angle F (see FIG. 3) between the contact surface 41 and the injection needle 2 is preferably, for example, 1 degree or more and 45 degrees or less, and more preferably 5 degrees or more and 20 degrees or less. .. The contact surface 41 of the present embodiment is tilted by about 15 degrees with respect to the injection needle 2. The contact surface 41 is composed of a surface extending along a plane including a horizontal axis extending in the horizontal direction and a vertical axis extending in the vertical direction. The contact surface 41 of the present embodiment is provided on the lower end side of the main body 3.

The upper surface 42 is composed of a surface extending along a plane including the horizontal axis and the vertical axis. That is, the upper surface 42 is arranged in parallel with the contact surface 41. A needle holding portion 7 is placed on the upper surface 42. The upper surface 42 and the needle holding portion 7 are integrally formed.

As shown in FIG. 3, the end surface 43 is a surface extending in the radial direction of the injection needle 2. The end face 43 of the present embodiment is concavely curved toward the other end side in the lateral direction.

As shown in FIG. 3, the extension portion 5 is provided on the extension surface 51 that abuts on the skin T in order to extend the skin T when the injection needle 2 is punctured, and when the skin T is extended. It also has a protrusion 52 that prevents the extension surface 51 from slipping against the skin T. The extension portion 5 of the present embodiment has an extension surface 51 on one end side in the lateral direction. That is, the extension surface 51 constitutes the end edge of the extension portion 5 on one end side in the lateral direction. The extension portion 5 is formed in a plate shape (thin plate shape) having a predetermined thickness. The extension portion 5 is formed to be slightly thinner than the contact portion 4. Since the extension portion 5 is formed thinner than the contact portion 4, it slightly bends in the thickness direction when the skin T is extended, and follows the deformation of the surface T4 of the skin T. As a result, the skin T pressed by the extension portion 5 is pulled so that the patient does not feel a sense of tension or pain.

Further, the extension portion 5 of the present embodiment has a pair of extension pieces 510 facing each other at intervals in the vertical direction. By forming the extension portion 5 with a pair of extension pieces 510 facing each other in the vertical direction, when the skin T is extended, the pair of extension pieces 510 are slightly bent in a direction in which the pair of extension pieces 510 approach each other, and follow the deformation of the surface T4 of the skin T. It is designed to do. Even with this configuration, the skin T pressed by the extension portion 5 is made less likely to cause a feeling of tension or pain.

The extension portion 5 is formed by chamfering a corner portion on one end side in the lateral direction. With this configuration, when the skin T is stretched, the bite of the corner portion into the skin T is alleviated.

At least a part of the extension surface 51 is arranged on the other side in the radial direction of the injection needle 2, and is arranged apart from the tip 21 of the injection needle 2 in the axial direction of the injection needle 2. Specifically, the extension surface 51 is arranged so as to be separated from the tip end 21 of the injection needle 2 on the side opposite to the proximal end 22. The extension surface 51 is inclined so as to stand upright on the other side in the radial direction of the injection needle 2 than the contact surface 41 with respect to the axial direction of the injection needle 2. Although an example is shown in FIG. 3 as an aspect of the extension surface 51, the length of the extension surface 51 in the lateral direction may be longer or shorter than that of the aspect of FIG. 3, and can be freely set. Is.

As shown in FIG. 3, the extension surface 51 has a first extension surface 511 formed so that the inclination angle C with respect to the contact surface 41 is a predetermined inclination angle C, and the inclination angle C with respect to the contact surface 41 is It has a second extension surface 512 formed so as to have an angle larger than the predetermined inclination angle C. The first extension surface 511 and the second extension surface 512 are continuous. The first extension surface 511 is located on one end side in the lateral direction with respect to the second extension surface 512.

As shown in FIG. 3, the first extended surface 511 is formed of a flat surface. The inclination angle C between the first extension surface 511 and the contact surface 41 is preferably, for example, 100 degrees or more and 150 degrees or less, and more preferably 120 degrees or more and 140 degrees or less. The first extension surface 511 of the present embodiment is inclined by about 135 degrees with respect to the contact surface 41.

The second extended surface 512 is formed by a curved surface curved toward the lower end side (skin T side) in the thickness direction. Since the second extension surface 512 is composed of a curved surface curved toward the lower end side, as will be described later, the main body portion 3 is laid down on the skin T while the skin T is extended by the extension portion 5. At that time, the second extension surface 512 abuts on the skin T in order from the first extension surface 511 side. Therefore, the extended surface 51 is difficult to separate from the skin T during the extension of the skin T, and the extended state of the skin T can be maintained satisfactorily until the injection needle 2 is punctured. Further, the lateral length of the second extension surface 512 is formed to be longer than the lateral length of the first extension surface 511.

The protrusion 52 is formed so as to extend in the vertical direction. In this embodiment, the protrusions 52 are formed in two rows. However, the shape and number of the protrusions 52 are not limited to this, and a plurality of protrusions 52 may be formed so as to be scattered in dots on the first extension surface 511.

The intermediate portion 6 is formed between the contact portion 4 and the extension portion 5, and is configured so as not to hinder the formation of the bulge portion B (see FIG. 11). The intermediate portion 6 is arranged between the contact surface 41 and the extension surface 51 on the other side in the radial direction of the injection needle 2 than the tip 21 of the injection needle 2. The intermediate portion 6 is formed in a region near the tip 21 of the injection needle 2. The intermediate portion 6 is formed with a recess 61 recessed in the other direction in the radial direction. The vicinity region is a region assumed as a region where a bulge B is formed around the tip 21 of the injection needle 2, and is, for example, within a region extending about 1.0 cm in diameter around the opening 210 of the injection needle 2. Area of.

One end side of the intermediate portion 6 in the lateral direction is connected to the extension portion 5, the other end side is connected to the contact portion 4, and at least a part thereof is located above the injection needle 2 in the height direction. That is, the intermediate portion 6 is arranged so as to straddle the tip 21 of the injection needle 2 in the lateral direction on the other side in the radial direction of the injection needle 2. The intermediate portion 6 is formed in a plate shape (thin plate shape) having a predetermined thickness. The thickness of the intermediate portion 6 is formed to be substantially the same as the thickness of the contact portion 4. The intermediate portion 6 is connected to the extension portion 5 by a rib 62 for ensuring the connection strength.

The intermediate portion 6 has a lower end surface 63 on the lower end side (skin T side) in the thickness direction. A recess 61 is formed in the intermediate portion 6 by recessing the lower end surface 63 toward the upper end side in the thickness direction. In the present embodiment, the recess 61 is formed as a through hole 61a that penetrates the intermediate portion 6 in the height direction (thickness direction).

The lower end surface 63 of the present embodiment is inclined from the contact surface 41 toward the other side in the radial direction of the injection needle 2 with respect to the axial direction of the injection needle 2.

Generally, the bulging portion B is formed in a circular shape having a diameter of about 1.0 cm. Therefore, the recess 61 of the present embodiment is a circular through hole 61a. The recess 61 preferably has a diameter of 0.5 cm or more and 1.5 cm or less so that the inner peripheral edge is located outside the bulge portion B with respect to the outer peripheral edge of the bulge portion B. The recess 61 of the present embodiment is formed so as to have a diameter of about 1.0 cm.

As shown in FIG. 3, the needle holding portion 7 holds the injection needle 2 so that the tip 21 of the injection needle 2 is exposed from the main body portion 3 by a predetermined length. The needle holding portion 7 holds the injection needle 2 so that the tip 21 of the injection needle 2 protrudes from the end surface 43 of the contact portion 4 and the base end surface of the injection needle 2 is located in the syringe mounting portion 8. The needle holding portion 7 is formed with an insertion hole 70 through which the injection needle 2 is inserted. The outer peripheral surface of the injection needle 2 is adhered to and held by an adhesive means such as welding to the inner peripheral surface of the insertion hole 70. Alternatively, the injection needle 2 is integrated with the inner peripheral surface of the insertion hole 70 by insert molding.

The syringe mounting portion 8 has a first mounting portion 81 mounted on the dispensing portion S2 (see FIG. 11) of the syringe S, and a second mounting portion 82 mounted on the body portion S1 of the syringe S. The syringe mounting portion 8 extends from the needle holding portion 7 to the other end side in the lateral direction.

As shown in FIG. 11, the first mounting portion 81 is formed in a cylindrical shape and houses the dispensing portion S2 of the syringe S inside. The first mounting portion 81 is formed so that its center line coincides with the axial direction of the injection needle 2.

The second mounting portion 82 is configured to receive the body portion S1 of the syringe S. The second mounting portion 82 is formed on a surface facing the upper side of the main body portion 3 in the height direction, and supports the body portion S1 of the syringe S from the lower side.

The grip portion 9 is a portion that the user holds the injection needle 2 with, for example, the thumb and the index finger when puncturing the skin T. Further, the grip portion 9 is a portion held by the user when the intradermal injection assisting tool 1 is attached to the syringe S. The grip portion 9 is provided so as to be located on both sides of the syringe mounting portion 8 in the vertical direction. Specifically, the grip portion 9 has a pair of grip pieces 91 facing each other at intervals in the vertical direction. That is, the syringe mounting portion 8 is arranged between the pair of gripping pieces 91. By arranging the gripping portions 9 on both sides of the syringe mounting portion 8 in this way, the user fixes the connection portion between the syringe S and the intradermal injection assisting tool 1 by gripping, and the injection needle 2 is attached to the skin T. It is possible to puncture stably.

The pair of gripping pieces 91 are composed of surfaces extending along a plane including an axis extending in the height direction and a horizontal axis.

Next, how the injection needle 2 is held by the main body 3 will be described. In the injection needle 2, the length of the exposed portion 23 and the inclination angle F with respect to the contact surface 41 are set so that the tip 21 is located in the dermis T2 of the skin T in the punctured state. Therefore, first, the position of the dermis T2 in the skin T will be described.

As shown in FIG. 11, the human skin T is composed of an epidermis T1 constituting the surface T4 of the skin T and a dermis T2 located below the epidermis T1. The subcutaneous tissue T3 is located below the dermis T2. Generally, the epidermis T1 has a thickness of about 0.2 mm. The dermis T2 is thicker than the epidermis T1 and is located at a depth of about 0.5 mm to 2.0 mm from the surface T4. In intradermal injection, the injection needle 2 is pierced into the skin T until the tip 21 (specifically, the opening 210) of the injection needle 2 reaches the inside of the dermis T2.

Due to the above-mentioned characteristics of intradermal injection, in the present embodiment, the exposed portion 23 of the injection needle 2 in the axial direction is prevented so that the tip 21 of the injection needle 2 is positioned in the dermis T2 and is not further inserted. Is set to have a predetermined length. Specifically, the injection needle 2 is punctured in an inclined posture with respect to the skin T, and the tip edge 21a located at the earliest position of the tip 21 reaches a predetermined depth H from the surface T4 of the skin T. The length of the exposed portion 23 is set as described above. In the present embodiment, the length of the exposed portion 23 is set so that the tip edge 21a of the injection needle 2 reaches a depth of 0.7 mm to 2.0 mm from the surface T4 of the skin T. Specifically, the length of the exposed portion 23 is set so that the tip edge 21a of the injection needle 2 reaches a depth of 1.0 mm from the surface T4 of the skin T.

This concludes the description of the intradermal injection aid 1 according to the present embodiment. Hereinafter, a method of using the intradermal injection assisting tool 1 will be described with reference to FIGS. 10 (a) to 10 (b) and FIGS. 11.

The user attaches a finger to the grip portion 9 and grips the intradermal injection assisting tool 1 so as to pick it up, and attaches the intradermal injection assisting tool 1 to the tip of the syringe S. Subsequently, the user grips the grip portion 9 from the upper end side in the height direction with the dominant hand, for example, the right hand. In this case, the user may grip the body portion S1 of the syringe S without gripping the grip portion 9. That is, the user performs the puncture work by grasping a portion that is easy to hold. The syringe S to which the intradermal injection assisting tool 1 is attached is positioned so that the contact surface 41 faces the skin T, and the extension surface 51 abuts on the skin T as shown in FIG. 10 (a). Stand against the skin T. At this time, the first extension surface 511 is brought into contact with the skin T.

In the present embodiment, since the first extension surface 511 is inclined by about 135 degrees with respect to the contact surface 41 (the inclination angle C in FIG. 3 is about 135 degrees), the first extension surface 511 hits the skin T. When brought into contact, the main body 3 is tilted by about 45 degrees with respect to the skin T, that is, the injection needle 2 and the syringe S are tilted by about 45 degrees with respect to the skin T. In this state, the stretched surface 51 is pressed against the skin T in the direction of the arrow shown in FIG. 10 (a) to stretch the skin T.

From the state shown in FIG. 10A, the main body 3 is gradually laid down and brought closer to the skin T. Since the second extension surface 512 is curved toward the skin T side, the first extension surface 511 extends the skin T, and the second extension surface 512 is in order from the first extension surface 511 side with respect to the skin T. It abuts (gradually) on each side and stretches the skin T. Then, as shown in FIG. 10B, the tip 21 of the injection needle 2 is pierced into the skin T. In this state, the stretched surface 51 is separated from the skin T, and the skin T is released from the stretched state. The user advances the syringe S in the direction of the arrow in FIG. 10B, and further lays the main body 3 to bring it closer to the skin T. Then, as shown in FIG. 10 (c), the contact surface 41 comes into contact with the skin T, and at the same time, the insertion of the injection needle 2 stops. In the present embodiment, the lower end surface 63 of the intermediate portion 6 is inclined toward the other side in the radial direction of the injection needle 2 from the contact surface 41 with respect to the axial direction of the injection needle 2. Therefore, in the state of FIG. 10C, the intermediate portion 6 itself is separated from the skin T, and it is difficult to inhibit the formation of the bulging portion B by the through hole 61a and the inclination.

The user pushes the plunger S3 into the syringe S with the left hand while holding the grip portion 9 with the right hand (or while holding the body portion S1 of the syringe S) with the injection needle 2 punctured by the skin T. The drug solution M is injected into the dermis T2. In the intradermal injection assisting tool 1 of the present embodiment, the contact surface 41 abuts on the skin T in a state where the injection needle 2 is punctured by the skin T, and the injection needle 2 makes a predetermined angle with respect to the skin T (this). In the embodiment, it is held in a punctured state at about 15 degrees). Therefore, even if the right hand is separated from the grip portion 9, the state in which the injection needle 2 is punctured by the skin T is maintained. The user may separate the right hand from the grip portion 9, grip the grip portion 9 with the left hand to fix the syringe S to the skin T, and push the plunger S3 into the syringe S with the right hand (dominant hand). When the syringe S is changed to the left hand in this way, the user may grasp the body portion S1 of the syringe S.

As shown in FIG. 11, a bulge B is formed on the skin T with the injection of the drug solution M. The user confirms the formation of the bulging portion B through the through hole 61a formed in the intermediate portion 6. After confirming that the bulge B has been formed, the user pulls out the injection needle 2.

Next, the second embodiment of the present invention will be described with reference to FIGS. 12 to 14. The same reference numerals are given to the configurations common to the first embodiment, and the description thereof will not be repeated.

The second embodiment is common to the first embodiment in that the recess 61 formed in the intermediate portion 6 is formed as the through hole 61a, but the shape of the through hole 61a is different from that of the first embodiment. In the second embodiment, the through hole 61a has a semicircular shape.

Specifically, the through hole 61a is formed so that an arc is located on the other end side in the lateral direction and the diameters coincide with each other in the vertical direction. The diameter of the through hole 61a of the second embodiment is formed to be about 1.0 cm. By forming the through hole 61a into a semicircular shape, it is possible to secure the connection strength between the intermediate portion 6 and the extended portion 5 without inhibiting the formation of the bulging portion B.

Next, the third embodiment of the present invention will be described with reference to FIGS. 15 to 17. The same reference numerals are given to the configurations common to the first embodiment, and the description thereof will not be repeated.

In the third embodiment, the shape of the recess 61 formed in the intermediate portion 6 is different from that of the first embodiment and the second embodiment. Specifically, the recess 61 of the third embodiment is formed not as a through hole 61a but as a recess 61b in which the lower end surface 63 is recessed toward the upper side in the height direction as shown in FIG. There is. As shown by the alternate long and short dash line in FIG. 16, the recess 61b is formed so that the end edge is located outside the tip 21 of the injection needle 2. That is, the opening 210 of the injection needle 2 is formed inside the recess 61b in a plan view in the height direction. Further, in the present embodiment, the exposed portion 23 of the injection needle 2 is formed inside the recess 61b in a plan view in the height direction. As described above, since the recess 61b is formed so as to surround the tip 21 of the injection needle 2 in a plan view in the height direction, even if the skin T around the tip 21 of the injection needle 2 bulges, the bulging portion B Can be escaped so as not to come into contact with the intermediate portion 6.

The intermediate portion 6 of the third embodiment has a pair of intermediate pieces 60 facing each other at a distance in the vertical direction. The intermediate piece 60 is connected to the extension piece 510 in the extension portion 5. In the present embodiment, a gap L extending in the lateral direction is formed between the pair of intermediate pieces 60 and the pair of extension pieces 510. The gap L extends in the axial direction of the injection needle 2 in a plan view in the height direction, and is formed at a position overlapping with the injection needle 2 in the height direction.

In the third embodiment, the bulge B can be released to the recess 61b of the recess 61, and the user can inject the drug solution M into the skin T and then between the pair of intermediate pieces 60 and the pair of extension pieces 510. The formation of the bulging portion B can be confirmed from the gap L.

As described above, when using the intradermal injection assisting tool 1 according to the above embodiment, the user attaches the intradermal injection assisting tool 1 to the syringe S, and the contact surface 41 is the skin T. Arranged toward the side, the extension surface 51 is pressed against the skin T to extend the skin T. When the contact surface 41 is laid down so as to approach the skin T from this state, the tip 21 of the injection needle 2 begins to pierce the extended skin T with the extension surface 51 extending the skin T. When the contact surface 41 is further laid down, the tip 21 of the injection needle 2 enters the skin T, and the contact surface 41 is pierced into the skin T at a predetermined angle by the tip 21 of the injection needle 2. The injection needle 2 is further restricted from being pierced into the skin T. Here, since the extension surface 51 is inclined so as to stand upright on the other side in the radial direction from the contact surface 41 with respect to the axial direction of the injection needle 2, the insertion of the injection needle 2 is restricted. , The extended surface 51 is in a state of being separated from the skin T.

As described above, according to the intradermal injection assisting tool 1 having the above configuration, the injection needle 2 can be pierced with the skin T extended, and the injection needle 2 is pierced into the skin T for a predetermined length. Since the skin T can be released from the extended state after the injection, it is easy to pierce the skin T with the injection needle 2 and it is difficult to inhibit the formation of the bulging portion B formed on the skin T by the injection of the drug solution M. It has become a thing.

Further, in the above embodiment, the intermediate portion 6 formed in the region near the tip 21 of the injection needle 2 is formed with a recess 61 recessed in the other side in the radial direction. That is, since the recess 61 is formed at the position corresponding to the position where the bulge B is formed so as to avoid the bulge B, it is difficult for the skin T to come into contact with the main body 3 after the injection needle 2 is punctured. The formation of the bulge B is less likely to be inhibited.

Further, in the first and second embodiments, the recess 61 is formed as a through hole 61a penetrating the intermediate portion 6, so that there is no obstacle that the skin T abuts in the direction in which the bulge B is formed. , The formation of the bulge B is less likely to be inhibited.

In the first to third embodiments, when the first extension surface 511 is brought into contact with the skin T, the injection needle 2 and the syringe S are in an inclined posture of about 45 degrees with respect to the skin T. Therefore, the injection needle 2 can be punctured into the skin T while holding the syringe S in a natural posture with respect to the skin T without excessively raising the syringe S with respect to the skin T. Therefore, it is easily accepted by the patient, and the patient can receive the intradermal injection with peace of mind.

In the above embodiment, the injection needle 2 is held by the main body 3 so that the opening surface of the opening 210 faces the other side in the radial direction of the injection needle 2. That is, the injection needle 2 is held in the main body 3 so that the opening 210 faces the epidermis T1 side (surface T4 side) in a state where the tip 21 of the injection needle 2 is located in the dermis T2. Therefore, it is not necessary to align the opening 210 of the injection needle 2 so as to face upward after the syringe S is attached, and the injection needle 2 can be punctured accurately and concisely.

In the above embodiment, the contact surface 41 comes into contact with the skin T in a state where the injection needle 2 is punctured, and the injection needle 2 is stably held in an inclined state with respect to the skin T. Therefore, for example, even if the patient moves after the injection needle 2 is punctured or the user accidentally releases his / her hand from the grip portion 9, the injection needle 2 does not easily wobble with respect to the skin T, and the injection needle 2 does not easily wobble from the skin T. It's hard to come off.

In the above embodiment, the tip 21 of the injection needle 2 protrudes from the end surface 43 of the contact portion 4. That is, as shown in FIG. 11, not all of the exposed portion 23 of the injection needle 2 is punctured by the skin T, but when the injection needle 2 is punctured, the proximal end portion P of the exposed portion 23 is punctured. It is in a state of protruding above the surface T4 of the skin T. Therefore, for example, even if there is an deposit on the end surface 43 of the contact portion 4 or the boundary portion between the exposed portion 23 and the non-exposed portion 24 of the injection needle 2, the deposit is prevented from invading the skin T. be able to.

In the above embodiment, the main body 3 is provided with a grip 9 for the user to grip. Then, the user can attach the grip portion 9 with a finger to grip the intradermal injection assisting tool 1 and attach it to the syringe S. As described above, the intradermal injection assisting tool 1 is provided with the grip portion 9 to prevent the user from gripping a portion other than the grip portion 9, and can maintain hygiene. Further, the intradermal injection assisting tool 1 may have an effect that the user can prevent the user from coming into contact with the injection needle 2 by providing the grip portion 9, and the user can use it safely.

It should be noted that the intradermal injection aid 1 of the present invention is not limited to the above embodiment, and it is needless to say that various modifications can be made without departing from the gist of the present invention.

In the above embodiment, the case where the through hole 61a is formed in a circular shape or a semicircular shape has been described, but the present invention is not limited to this. The through hole 61a may have an elliptical shape or a fan shape, for example. Further, the shape may be a shape having no arc, such as a square shape.

Although not particularly mentioned in the above embodiment, for example, in the second embodiment, the semicircular through hole 61a and the recess 61b as the recess 61 may be formed in the intermediate portion 6. For example, a recess 61b as a recess 61 may be formed on the lower end surface 63 of the portion adjacent to the through hole 61a, and the bulging portion B may be released by both the through hole 61a and the recess 61b.

In the above embodiment, the case where the tip 21 of the injection needle 2 protrudes from the end surface 43 of the contact portion 4 has been described, but the present invention is not limited to this. If the puncture depth H of the injection needle 2 with respect to the skin T is set, the tip 21 of the injection needle 2 may protrude from the contact surface 41.

In the above embodiment, the case where the recess 61 for avoiding the bulge B is formed in the intermediate portion 6 of the intradermal injection assisting tool 1 has been described, but the present invention is not limited to this. If the extension surface 51 is inclined so as to stand upright on the other side of the injection needle 2 in the radial direction with respect to the axial direction of the injection needle 2, at least the skin T is formed at the timing when the bulge portion B is formed. The recess 61 may not be formed so that the extension of the can be opened.

1 ... Intradermal injection aid, 2 ... Injection needle, 21 ... Tip, 22 ... Base end, 23 ... Exposed part, 24 ... Unexposed part, 21a ... Tip edge, 210 ... Opening, 3 ... Main body part, 4 ... abutment part, 41 ... abutment surface, 42 ... top surface, 43 ... end face, 5 ... extension part, 51 ... extension surface, 52 ... protrusion, 510 ... extension piece, 511 ... first extension surface, 512 ... second ... Extension surface, 6 ... intermediate part, 60 ... intermediate piece, 61 ... concave, 62 ... rib, 63 ... lower end surface, 61a ... through hole, 61b ... recess, 7 ... needle holding part, 8 ... syringe mounting part, 81 ... 1 mounting part, 82 ... second mounting part, 9 ... gripping part, 91 ... gripping piece, B ... bulging part, C ... tilt angle, L ... gap, M ... chemical solution, S ... syringe, S1 ... body part, S2 ... Injection part, S3 ... plunger, S2a ... injection hole, T ... skin, T1 ... epidermis, T2 ... dermal, T3 ... subcutaneous tissue, T4 ... surface

Claims (3)

An intradermal injection aid that is attached to a syringe to assist intradermal injection.
With an injection needle,
A main body portion that holds the injection needle so that the axial direction of the injection needle is aligned with the puncture direction is provided.
The main body is
The injection needle forms a predetermined angle of 1 degree or more and 45 degrees or less with respect to the epidermis, and the contact is inclined with respect to the axial direction so as to abut the epidermis with the tip punctured by the dermis. A contact surface which is a surface and at least a part thereof is arranged on one side in the radial direction of the injection needle and is arranged on the proximal end side of the tip of the injection needle.
An extension surface that comes into contact with the epidermis to extend the skin when the injection needle is punctured, at least a part of which is arranged on the other side in the radial direction and at the tip of the injection needle in the axial direction. It has an extension surface, which is arranged at a distance from each other.
The extension surface is tilted from the inclination of the contact surface with respect to the axial direction so that the injection needle can come into contact with the epidermis at an angle larger than the predetermined angle with respect to the epidermis . An intradermal injection aid that is also formed on a large slope. An intermediate portion between the contact surface and the extension surface, which is arranged on the other side in the radial direction from the tip of the injection needle and is formed in a region near the tip of the injection needle. Have and
The auxiliary tool for intradermal injection according to claim 1, wherein a recess recessed in the other side in the radial direction is formed in the intermediate portion. The contact surface is configured to be inclined with respect to the axial direction so as to be separated from the epidermis when the extended surface is in contact with the epidermis .
The intradermal injection according to claim 1 or 2, wherein the extended surface is configured to be inclined with respect to the axial direction so as to be separated from the epidermis when the contact surface is in contact with the epidermis . Auxiliary tool.

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