JP2019072234A - Intradermal injection aid - Google Patents

Abstract

To provide an intradermal injection aid in which a needle is easy to be punctured to skin, and the formation of a bulging part is hard to be obstructed.SOLUTION: An intradermal injection aid 1 includes a syringe needle 2 and a body part 3 for holding the syringe needle 2. The body part 3 has: an abutment surface 41 having the syringe needle 2 forming a predetermined angle to skin T and inclined to the axial direction so that the tip 21 may come in abutment with the skin T while being punctured in dermis T2, the abutment surface 41 that has at least a portion being arranged at one side in the radial direction of the syringe needle 2 and is arranged in the base end 22 side from the tip 21 of the syringe needle 2; and an extension plane 51 coming in abutment with the skin T when the syringe needle 2 is punctured, the extension plane 51 that has at least a portion being arranged at the other side in the radial direction and arranged separately to the tip 21 of the syringe needle 2 in the axial direction. The extension plane 51 is inclined to stand up at the other side in the radial direction from the abutment surface 41 to the axial direction.SELECTED DRAWING: Figure 3

Description

  The present invention relates to an intradermal injection aid for assisting intradermal injection of injecting a drug solution into the dermis.

  Conventionally, various intradermal injection aids 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 at a position shallow from the surface of the skin to inject a drug solution into the dermis. Specifically, a person who performs intradermal injection inclines the injection needle, for example, about 15 degrees with respect to the skin, and slowly punctures the tip of the injection needle into the skin. At that time, in order to stabilize the puncture position (depth) at the time of puncturing so that the injection needle can smoothly enter the skin, the skin is extended and injection is performed in a state of being fixed smoothly (state of being extended and fixed) Prick the needle. Under such circumstances, an adapter as an intradermal injection aid having a function of extending the skin as disclosed in Patent Document 1 has also been proposed.

  The adapter of Patent Document 1 includes a main body portion slidably holding a syringe in a puncturing direction, a locking portion for locking a distal end which is a tip portion of a needle hub of the syringe, and a syringe needle A first skin contact surface in which a needle opening is formed, a second skin contact surface located on the tip side of the needle opening, and an extension of the second skin contact surface And a distal contact surface.

  When using the adapter of Patent Document 1, the user brings the second skin contact surface into contact with the skin in a state where the skin is extended at the distal contact surface, and in this state, the distance of the injection needle is Slide the syringe towards the distal contact surface until the proximal end abuts against the lock on the adapter. Then, the tip of the injection needle is punctured into the skin in a state where the tip of the injection needle protrudes from the needle opening by a predetermined length, and the tip is positioned in the dermis. Thus, the adapter of Patent Document 1 can reach the tip of the injection needle in the dermis with the skin extended, and the intradermal injection can be precisely performed even by a user who is not skilled in intradermal injection. It is supposed to be able to

Patent No. 5213950 gazette

By the way, intradermal injection is characterized in that the skin around the tip of the injection needle is expanded by the injected medical solution, and a bulging portion is formed.
However, in the above-mentioned conventional adapter, the distal end of the injection needle is extended with the distal contact surface extending the part to be pierced by the injection needle and the second skin contact surface abutting on the extended part. Slide the syringe to the distal contact side until it abuts against the lock on the adapter. That is, in the above-mentioned conventional adapter, the portion in which the bulging portion is formed is extended by the distal side contact surface, and the second skin contact surface is in contact. Therefore, in the conventional adapter described above, there is a problem that the formation of the bulge is inhibited by the extension of the skin and the presence of the second skin contact surface, and the bulge is not formed well.

  Then, this invention makes it a subject to provide the auxiliary | assistant tool for intradermal injection which it is easy to puncture an injection needle in skin in view of this situation, and which is hard to inhibit formation of a bulging part.

The intradermal injection aid according to the present invention is an intradermal injection aid attached to a syringe for assisting intradermal injection,
An injection needle,
And a main body for holding the injection needle so that the axial direction of the injection needle is in alignment with the puncture direction.
The main unit is
An abutment surface inclined with respect to the axial direction such that the injection needle is at a predetermined angle to the skin and the tip is in contact with the skin in a state of being pierced by the dermis, at least a portion of which is the injection needle An abutment surface disposed on one side in the radial direction of the needle and disposed proximal to the tip of the injection needle;
An extension surface that contacts the skin to extend the skin when the injection needle is punctured, at least a portion of which is disposed on the other side in the radial direction and spaced apart from the tip of the injection needle in the axial direction And the extended surface placed
The extension surface is inclined so as to stand on the other side in the radial direction with respect to the contact surface with respect to the axial direction.

  When using the intradermal injection aid of such a configuration, the user mounts the intradermal injection aid on the syringe, places the contact surface toward the skin side, and places the extension surface on the skin. Press and stretch the skin. From this state, when the contact surface is laid so as to approach the skin, the tip of the injection needle starts to pierce the extended skin while the extended surface extends the skin. When the contact surface is further laid down, the tip of the injection needle penetrates into the skin, and the contact surface contacts the skin in a state where the tip of the injection needle is stuck in the skin at a predetermined angle, and more injection needles It is regulated that it is pierced into the skin. Here, since the extension surface is inclined so as to stand on the other radial side with respect to the contact surface with respect to the axial direction of the injection needle, the extension surface is in a state in which the insertion of the injection needle is restricted. It is in a state away from the skin.

  Thus, according to the aid for intradermal injection of the above configuration, the injection needle can be punctured while the skin is extended, and after the injection needle pierces the skin for a predetermined length, Since the skin can be released from the stretched state, the injection needle can be easily punctured into the skin, and it is difficult to inhibit the formation of a bulge formed on the skin by the injection of a drug solution.

As another aspect of the present invention, the aid for intradermal injection is an intermediate portion disposed between the contact surface and the extension surface on the other side in the radial direction with respect to the tip of the injection needle, Having an intermediate portion formed in a region near the tip of the needle;
The middle portion may be formed with a concave portion recessed toward the other side in the radial direction.

  According to this configuration, the intermediate portion formed in the region in the vicinity of the tip of the injection needle is formed with a concave portion recessed toward the other side in the radial direction. That is, since the concave portion is formed at a position corresponding to the position where the bulging portion is formed so as to avoid the bulging portion, it is difficult for the skin to abut the main body portion after puncturing the injection needle It is difficult to do.

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

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

  As described above, according to the present invention, it is possible to provide an intradermal injection aid which makes it easy to puncture the injection needle into the skin and which is less likely to inhibit the formation of the bulge.

It is a perspective view of the aid for intradermal injection concerning a 1st embodiment. It is a top view of the auxiliary tool for intradermal injection concerning the embodiment. It is sectional drawing of the auxiliary tool for intradermal injection concerning the embodiment, Comprising: It is sectional drawing in the III-III line position of FIG. It is a perspective view of the auxiliary tool for intradermal injection concerning the embodiment, and is a perspective view seen from the bottom side. It is a bottom view of the auxiliary tool for intradermal injection concerning the embodiment. It is a rear view of the auxiliary tool for intradermal injection concerning the embodiment. It is a front view of the auxiliary tool for intradermal injection concerning the embodiment. It is a right view of the auxiliary tool for intradermal injection concerning the embodiment. It is a left view of the auxiliary tool for intradermal injection concerning the embodiment. It is a figure for demonstrating the usage method of the auxiliary tool for intradermal injection which concerns on the embodiment, (a) is a figure of the state before puncturing, (b) is a figure in the middle of puncturing, (c) is a figure. The tip of the injection needle is pierced into the skin for a predetermined length, and the puncture is completed. It is an expanded sectional view for explaining the state where a bulged part was formed. It is a perspective view of the auxiliary tool for intradermal injection concerning 2nd Embodiment. It is a top view of the auxiliary tool for intradermal injection concerning the embodiment. It is sectional drawing of the auxiliary tool for intradermal injection which concerns on the embodiment, Comprising: It is sectional drawing in the XIV-XIV line position of FIG. It is a perspective view of the auxiliary tool for intradermal injection concerning 3rd Embodiment. It is a top view of the auxiliary tool for intradermal injection concerning the embodiment. It is sectional drawing of the auxiliary tool for intradermal injection concerning the embodiment, Comprising: It is sectional drawing in the XVII-XVII line position of FIG.

  Hereinafter, the intradermal injection aid 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 aid for intradermal injection.

  The intradermal injection aid 1 according to this embodiment is attached to a syringe S (see FIGS. 10 and 11) and is for assisting intradermal injection. The intradermal injection assisting device 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 extends in the puncturing direction. That is, the intradermal injection aid 1 is used by being attached to the syringe S not equipped with the injection needle 2, and from the syringe S, the intradermal injection needle is attached.

  First, the syringe S to which the intradermal injection aid 1 is attached will be described. The syringe S is connected to the cylindrical body portion S1 and one end of the body portion S1 in the central axis direction, as shown in FIGS. 10 and 11, for discharging the liquid medicine M in the syringe S to the outside. And a plunger S3 inserted from the other end of the body S1 into the body S1. In the pouring portion S2, a pouring hole S2a, which is a passage for the liquid medicine M, is formed to extend in the central axial direction of the body portion S1. In the syringe S, when the intradermal injection assisting tool 1 is attached, the injection needle 2 and the trunk portion S1 communicate with each other through the pouring hole S2a of the pouring portion S2, and the drug solution M in the trunk portion S1 is It is configured to be able to be poured out through the injection needle 2. When the intradermal injection auxiliary tool 1 is attached to the syringe S, the central axial direction of the body portion S1 and the axial direction of the injection needle 2 coincide with each other.

  The injection needle 2 has a tip 21 for injecting 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 by the main body 3 so that the tip 21 is exposed for a predetermined length. Hereinafter, the exposed portion of the injection needle 2 may be referred to as an exposed portion 23, and the portion closer to the proximal end 22 than the exposed portion 23 may be referred to as a non-exposed 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 by the main body 3 so that the opening surface of the opening 210 faces the other side of the injection needle 2 in the radial direction (so that the opening 210 opens upward in the height direction described later) It is done. The injection needle 2 is thinner than a normal injection needle because it is used for intradermal injection.

  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 along the puncture direction. The main body portion 3 contacts the contact portion 4 that contacts the skin T when puncturing the injection needle 2 with the skin T, the extension portion 5 that extends the skin T when puncturing the injection needle 2 with the skin T, The intermediate portion 6 disposed between the portion 4 and the extension portion 5 and connecting the contact portion 4 and the extension portion 5, the needle holding portion 7 for holding the injection needle 2, and the syringe attachment to which the syringe S is attached It comprises a portion 8 and a gripping portion 9 which is gripped when the user mounts the intradermal injection aid 1 on the syringe S, or at the time of puncturing. As described later, the user may hold the holding unit 9 or hold the body S1 of the syringe S at the time of puncturing.

  The main body portion 3 extends in the transverse direction, which is perpendicular to the longitudinal direction and the transverse direction, 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 such that the tip 21 of the injection needle 2 protrudes from the lower end side in the height direction orthogonal to the longitudinal direction and the lateral direction. The main body portion 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 portion 3 is formed such that the length in the lateral direction is longer than the length in the vertical direction. In the main body portion 3 of the present embodiment, the extension portion 5, the intermediate portion 6, the contact portion 4, and the syringe mounting portion 8 are arranged in this order from one end side in the lateral direction. The needle holding portion 7 is provided on an upper surface 42 described later of the contact portion 4. In addition, the gripping portions 9 are provided on both sides of the syringe mounting portion 8 in the longitudinal direction.

  As shown in FIG. 3, FIG. 10 and FIG. 11, the contact portion 4 is formed on the skin T in a state where the injection needle 2 forms a predetermined angle with respect to the skin T and its tip 21 is punctured by the dermis T2. It has an abutment surface 41 inclined with respect to the axial direction of the injection needle 2 to abut. The contact portion 4 is formed in a plate shape (thin plate shape) having a predetermined thickness. The contact portion 4 is disposed on the opposite side of the contact surface 41, and has an upper surface 42 facing the upper side in the height direction and an end surface 43 located on one end side in the lateral direction.

  At least a part of the abutment surface 41 is disposed on one side in the radial direction of the injection needle 2, and is disposed 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, for example, preferably 1 degree or more and 45 degrees or less, and more preferably 5 degrees or more and 20 degrees or less . The abutment surface 41 of the present embodiment is inclined at about 15 degrees with respect to the injection needle 2. The abutment surface 41 is configured to extend along a plane including a transverse axis extending in the lateral direction and a longitudinal axis extending in the longitudinal 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 disposed in parallel with the contact surface 41. The needle holding unit 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 surface 43 of this 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 comes in contact with the skin T so as to extend the skin T when the injection needle 2 is punctured, and when extending the skin T And a protrusion 52 for preventing the extension surface 51 from sliding against the skin T. The extension portion 5 of the present embodiment has an extension surface 51 at one end side in the lateral direction. That is, the extension surface 51 constitutes an end edge of the extension portion 5 at 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 slightly thinner than the contact portion 4. The extension portion 5 is formed thinner than the contact portion 4 so that it is slightly bent in the thickness direction when extending the skin T, 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 pinched so that a sense of discomfort such as a feeling of tightness or pain felt by the patient is less likely to occur.

  Moreover, the extension part 5 of this embodiment has a pair of extension pieces 510 which oppose each other at intervals in the longitudinal direction. By forming the extension portion 5 with the pair of extension pieces 510 opposed in the longitudinal direction, when extending the skin T, the pair of extension pieces 510 are slightly bent in the approaching direction and follow the deformation of the surface T4 of the skin T It is supposed to This configuration also makes it difficult to cause discomfort such as a feeling of tightness and pain in which the skin T pressed by the extension portion 5 is pinched.

  The extension portion 5 is formed by chamfering a corner on one end side in the lateral direction. By this configuration, the bite of the corner with respect to the skin T when relaxing the skin T is alleviated.

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

  As shown in FIG. 3, the extension surface 51 has a first extension surface 511 formed such 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 And a second extension surface 512 formed to be 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 closer to one end side in the lateral direction than the second extension surface 512.

  As shown in FIG. 3, the first extension surface 511 is formed of a flat surface. The inclination angle C between the first extension surface 511 and the contact surface 41 is, for example, preferably 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 at about 135 degrees with respect to the contact surface 41.

  The second extension surface 512 is formed of a curved surface that is curved toward the lower end side (skin T side) in the thickness direction. Since the second extension surface 512 is configured by a curved surface curved toward the lower end side, the main body 3 is laid on the skin T while extending the skin T in the extension unit 5 as described later. At the same time, the second extension surface 512 abuts on the skin T sequentially from the first extension surface 511 side. Therefore, the extension surface 51 does not easily separate from the skin T during extension of the skin T, and the extension state of the skin T can be favorably maintained until the injection needle 2 is punctured. Further, the lateral length of the second extension surface 512 is longer than the lateral length of the first extension surface 511.

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

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

  The middle portion 6 is connected to the extension portion 5 at one end side in the lateral direction, is connected to the contact portion 4 at the other end side, and at least a part is positioned above the injection needle 2 in the height direction. That is, on the other side in the radial direction of the injection needle 2, the intermediate portion 6 is disposed so as to straddle the tip 21 of the injection needle 2 in the lateral direction. The middle 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 middle portion 6 is connected to the extension portion 5 by a rib 62 for securing connection strength.

  The middle 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 middle 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 61 a that penetrates the middle portion 6 in the height direction (thickness direction).

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

  Generally, the bulge 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 expanded portion B than the outer peripheral edge of the expanded portion B. The recess 61 in the present embodiment is formed to have a diameter of about 1.0 cm.

  As shown in FIG. 3, the needle holding unit 7 holds the injection needle 2 such that the tip 21 of the injection needle 2 is exposed from the main body 3 by a predetermined length. The needle holding portion 7 holds the injection needle 2 such that the tip 21 of the injection needle 2 protrudes from the end surface 43 of the contact portion 4 and the proximal end surface of the injection needle 2 is positioned in the syringe mounting portion 8. In the needle holding portion 7, an insertion hole 70 for inserting the injection needle 2 is formed. The outer peripheral surface of the injection needle 2 is adhered and held to the inner peripheral surface of the insertion hole 70 by bonding means such as welding. Alternatively, the injection needle 2 is integrated with the inner circumferential surface of the insertion hole 70 by insert molding.

  The syringe mounting portion 8 has a first mounting portion 81 mounted to the dispensing portion S2 (see FIG. 11) of the syringe S, and a second mounting portion 82 mounted to the body portion S1 of the syringe S. The syringe mounting portion 8 is extended 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 tubular shape, and accommodates the dispensing portion S2 of the syringe S therein. The first mounting portion 81 is formed such that its center line coincides with the axial direction of the injection needle 2.

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

  The gripping portion 9 is a portion held by, for example, the thumb and forefinger when the user punctures the skin T with the injection needle 2. Moreover, the holding part 9 is a part which a user clamps, when mounting | wearing the syringe S with the auxiliary tool 1 for intradermal injection. The gripping portions 9 are provided on both sides of the syringe mounting portion 8 in the longitudinal direction. Specifically, the gripping portion 9 has a pair of gripping pieces 91 facing each other at intervals in the longitudinal direction. That is, the syringe mounting portion 8 is disposed between the pair of gripping pieces 91. As described above, by arranging the gripping portions 9 on both sides of the syringe mounting portion 8, the user grips and secures the connection portion between the syringe S and the intradermal injection aid 1 and fixes the injection needle 2 to the skin T. It is possible to puncture in a stable manner.

  The pair of gripping pieces 91 is configured to extend along a plane including an axis extending in the height direction and a lateral axis.

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

  As shown in FIG. 11, a human skin T is composed of an epidermis T1 constituting a surface T4 of the skin T, and a dermis T2 located below the epidermis T1. And subcutaneous tissue T3 is located under dermis T2. Generally, the epidermis T1 has a thickness of around 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 punctured into the skin T until the tip 21 (specifically, the opening 210) of the injection needle 2 reaches in the dermis T2.

  Due to the above-described feature 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 not inserted further in the state of being located in the dermis T2. 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 of the tip 21 located at the foremost end reaches a predetermined depth H from the surface T4 of the skin T Thus, the length of the exposed portion 23 is set. In the present embodiment, the length of the exposed portion 23 is set such that the tip end 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 such that the tip end edge 21a of the injection needle 2 reaches a depth of 1.0 mm from the surface T4 of the skin T.

  The description of the intradermal injection aid 1 according to the present embodiment is as described above. Hereinafter, the usage method of the intradermal injection assisting device 1 will be described with reference to FIGS. 10 (a) to (b) and FIG.

  The user places a finger on the grip 9 and holds the intradermal injection aid 1 in a pinched manner, and attaches the intradermal injection aid 1 to the tip of the syringe S. Subsequently, the user holds the holding portion 9 so as to grip the holding portion 9 from the upper end side in the height direction with a dominant hand, for example, the right hand. In this case, the user may grip the body S1 of the syringe S without gripping the grip 9. That is, the user grips a portion that is easy to hold and performs the puncturing operation. Position the syringe S on which the auxiliary tool for intradermal injection 1 is attached so that the contact surface 41 faces the skin T, and as shown in FIG. 10A, the extension surface 51 contacts the skin T Stand against skin T. At this time, the first extension surface 511 is brought into contact with the skin T.

  In the present embodiment, 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). When brought into contact, the main body portion 3 is inclined at about 45 degrees with respect to the skin T, that is, the injection needle 2 and the syringe S are inclined at about 45 degrees with respect to the skin T. In this state, the extension surface 51 is pressed against the skin T in the direction of the arrow shown in FIG. 10A, and the skin T is extended.

  From the state shown in FIG. 10A, the main body 3 is gradually laid down to approach 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 with respect to the skin T. Contact each other (slowly) and stretch skin T. Then, as shown in FIG. 10 (b), the tip 21 of the injection needle 2 is pierced into the skin T. In this state, the extension surface 51 is separated from the skin T, and the skin T is released from the extended state. The user advances the syringe S in the direction of the arrow in FIG. 10 (b) and further causes the main body 3 to lie to approach the skin T. Then, as shown in FIG. 10C, the abutment surface 41 abuts on the skin T and the piercing of the injection needle 2 stops at the same time. In the present embodiment, the lower end surface 63 of the intermediate portion 6 is inclined toward the other radial direction side of the injection needle 2 with respect to 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.

  With the injection needle 2 punctured in the skin T, the user holds the holding portion 9 with the right hand (or holds the body S1 of the syringe S) and presses the plunger S3 into the syringe S with the left hand. The drug solution M is injected into the dermis T2. In the aid 1 for intradermal injection of the present embodiment, the contact surface 41 abuts on the skin T in a state where the injection needle 2 is punctured in the skin T, and the injection needle 2 is at a predetermined angle with respect to the skin T In the embodiment, it is held in a punctured state at about 15 degrees. Therefore, even if the right hand is released from the grip 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 9, hold the grip 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 thus switched to the left, the user may grip the body S1 of the syringe S.

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

  Next, a second embodiment of the present invention will be described with reference to FIGS. 12 to 14. The same components as those in the first embodiment are given the same reference numerals, and the description will not be repeated.

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

  Specifically, the through hole 61a is formed such that an arc is positioned on the other end side in the lateral direction, and the diameter matches the longitudinal 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 61 a in a semicircular shape, the connection strength between the intermediate portion 6 and the extension portion 5 can be secured without inhibiting the formation of the bulge portion B.

  Next, a third embodiment of the present invention will be described with reference to FIGS. The same components as those in the first embodiment are given the same reference numerals, and the description will not be repeated.

  The third embodiment is different from the first and second embodiments in the shape of the recess 61 formed in the middle portion 6. Specifically, the recess 61 in the third embodiment is not a through hole 61a, but as shown in FIG. 17, the lower end face 63 is formed as a recess 61b recessed toward the upper side in the height direction There is. As shown by an alternate long and short dash line in FIG. 16, the recess 61 b is formed such 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 61 b 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 61 b in a plan view in the height direction. As described above, since the recess 61 b is formed to surround the tip 21 of the injection needle 2 in plan view in the height direction, even if the skin T around the tip 21 of the injection needle 2 bulges, the bulge B Can be released so as not to abut on the intermediate portion 6.

  The middle portion 6 of the third embodiment has a pair of middle pieces 60 facing each other at intervals in the longitudinal direction. The middle 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 the injection needle 2 in the height direction.

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

  As described above, when using the intradermal injection aid 1 according to the above embodiment, the user mounts the intradermal injection aid 1 on the syringe S, and the contact surface 41 is a skin T. Place the face side and press the extension surface 51 against the skin T to extend the skin T. From this state, when the contact surface 41 is laid so as to approach the skin T, the extension surface 51 extends the skin T, and the tip 21 of the injection needle 2 starts to stick into the extended skin T. When the contact surface 41 is further laid down, the tip 21 of the injection needle 2 enters the inside of the skin T, and the contact surface 41 is the skin T with the tip 21 of the injection needle 2 stuck in the skin T at a predetermined angle. The needle 2 is restricted from being stuck in the skin T any more. Here, since the extension surface 51 is inclined so as to stand on the other radial side with respect to the contact surface 41 with respect to the axial direction of the injection needle 2, in a state where penetration of the injection needle 2 is restricted. , And the extension surface 51 is in a state of being separated from the skin T.

  Thus, according to the aid 1 for intradermal injection of the above configuration, the injection needle 2 can be punctured in a state in which the skin T is extended, and the injection needle 2 is pierced into the skin T by a predetermined length. Since the skin T can be released from the stretched state after implantation, the injection needle 2 can be easily punctured into the skin T and it is difficult to inhibit the formation of the bulge B formed on the skin T by the injection of the drug solution M. It has become a thing.

  Further, in the above-described embodiment, the intermediate portion 6 formed in the vicinity of the distal end 21 of the injection needle 2 is formed with a concave portion 61 recessed toward the other side in the radial direction. That is, since the recess 61 is formed at a 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 abut the main body 3 after puncturing the injection needle 2 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 the through hole 61a penetrating the intermediate portion 6, so there is no obstacle with which 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 a posture inclined 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 easy to be accepted by the patient, and the patient can receive the intradermal injection at ease.

  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 of the injection needle 2 in the radial direction. That is, the injection needle 2 is held by the main body 3 so that the opening 210 faces the epidermis T1 side (surface T4 side) with the tip 21 of the injection needle 2 positioned in the dermis T2. Therefore, there is no need to align the opening 210 of the injection needle 2 so that the direction of the opening 210 of the injection needle 2 is upward after mounting on the syringe S, and puncture of the injection needle 2 can be performed accurately and simply.

  In the above embodiment, the contact surface 41 abuts on the skin T in a state where the injection needle 2 is punctured, and the injection needle 2 is stably held in a state of being inclined with respect to the skin T. Therefore, for example, even if the patient moves after puncturing the injection needle 2 or the user accidentally removes the hand from the grip portion 9, the injection needle 2 is less likely to wobble with the skin T, and from the skin T It is difficult to remove.

  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, in the state where the entire exposed portion 23 of the injection needle 2 is not punctured into the skin T but the injection needle 2 is punctured, the proximal end P of the exposed portion 23 is It will be in the state of having come out above surface T4 of skin T. Therefore, for example, even if there is a deposit on the end face 43 of the contact portion 4 or the boundary between the exposed portion 23 of the injection needle 2 and the non-exposed portion 24, the deposit is prevented from entering the skin T be able to.

  In the above-mentioned embodiment, main part 3 is provided with grasping part 9 for a user to grasp. Then, the user can attach the finger to the grip portion 9 to grip the intradermal injection aid 1 and attach it to the syringe S. As described above, the intradermal injection assisting device 1 can prevent the user from gripping the portion other than the gripping portion 9 by including the gripping portion 9, and can maintain hygiene. In addition, the intradermal injection assisting device 1 can prevent the user from coming into contact with the injection needle 2 by providing the grasping portion 9, and can also be used safely by the user.

  The intradermal injection aid 1 of the present invention is not limited to the above-described embodiment, and it goes without saying that various modifications can be made without departing from the scope of the present invention.

  Although the said embodiment demonstrated the case where the through-hole 61a was formed by circular shape or semicircular shape, it is not limited to this. The through hole 61a may have, for example, an elliptical shape or a fan shape. Further, for example, it may have a shape such as a rectangular shape, which does not have an arc.

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

  Although the said embodiment demonstrated the case where the front-end 21 of the injection needle 2 was protruded from the end surface 43 of the contact part 4, it is not limited to this. The tip 21 of the injection needle 2 may protrude from the contact surface 41 as long as the puncture depth H of the injection needle 2 with respect to the skin T is set.

  Although the said embodiment demonstrated the case where the recessed part 61 which avoids the swelling part B is formed in the intermediate part 6, the auxiliary tool 1 for intradermal injection is not limited to this. If the extension surface 51 is inclined to the radial direction other side of the injection needle 2 with respect to the contact surface 41 with respect to the axial direction of the injection needle 2, at least the skin T at the timing when the bulge B is formed. The recess 61 may not be formed because it can release the extension.

DESCRIPTION OF SYMBOLS 1 ... aid for intradermal injection, 2 ... injection needle, 21 ... tip, 22 ... proximal end, 23 ... exposed part, 24 ... non-exposed part, 21 a ... tip edge, 210 ... opening part, 3 ... main part, 4 ... contact part 41 contact surface 42 upper surface 43 end surface 5 extension part 51 extension surface 52 projection part 510 extension piece 511 first extension surface 512 second Extending surface 6: Intermediate part 60: Intermediate piece 61: Concave part 62: Rib 63: Lower end face 61a: Through hole 61b: hollow, 7: needle holding part 8, syringe attachment part 81: 81st 1 mounting portion 82 second mounting portion 9 gripping portion 91 gripping portion B bulging portion C inclination angle L gap M chemical solution S syringe S1 barrel S2 S2 Injection part, S3 ... plunger, S2a ... injection hole, T ... skin, T1 ... epidermis, T2 ... dermis, T3 ... subcutaneous tissue, T4 ... surface

Claims (3)

An intradermal injection aid attached to a syringe for assisting intradermal injection, comprising:
An injection needle,
And a main body for holding the injection needle so that the axial direction of the injection needle is in alignment with the puncture direction.
The main unit is
An abutment surface inclined with respect to the axial direction such that the injection needle is at a predetermined angle to the skin and the tip is in contact with the skin in a state of being pierced by the dermis, at least a portion of which is the injection needle An abutment surface disposed on one side in the radial direction of the needle and disposed proximal to the tip of the injection needle;
An extension surface that contacts the skin to extend the skin when the injection needle is punctured, at least a portion of which is disposed on the other side in the radial direction and spaced apart from the tip of the injection needle in the axial direction And the extended surface placed
The intradermal injection aid, wherein the extension surface is inclined so as to stand on the other side in the radial direction with respect to the contact surface with respect to the axial direction. It has an intermediate portion between the contact surface and the extension surface, which is an intermediate portion disposed on the other side in the radial direction with respect to the tip of the injection needle and in a region near the tip of the injection needle ,
The intradermal injection aid according to claim 1, wherein the middle portion is formed with a concave portion recessed toward the other side in the radial direction.   The intradermal injection aid according to claim 2, wherein the recess is a through hole penetrating the intermediate portion.

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