JP5118533B2 - Syringe needle set - Google Patents

Description

  The present invention relates to an injection needle set for injecting a drug solution, and more particularly to an injection needle set capable of defining a puncture depth of an injection needle to be used.

  In the human skin, the epidermis, dermis, fat layer and muscle tissue are formed from the surface side. Intradermal injection injects into the epidermis or dermis, and subcutaneous injection injects into the fat layer. Intradermal injection and subcutaneous injection are selected according to the type of medicinal solution and the purpose of injection.

  Since the epidermis, dermis and fat layer are relatively thin, it is not always convenient for non-experts to inject the desired subcutaneous or intradermal.

  From such a background, a syringe that can regulate the puncture depth by restricting the progress of the injection needle in the skin direction with a predetermined stopper has been proposed (for example, see Patent Document 1 or Patent Document 2). .

Japanese Patent No. 2648314 Special table 2007-528274 gazette

  In the syringes described in Patent Document 1 and Patent Document 2, it is preferable that the puncture depth of the injection needle can be specified, but the syringe during injection is unstable and the puncture depth is constant. There are concerns that cannot be maintained.

  Therefore, for example, it is difficult for a patient with weak visual acuity or a person who is not dexterous to inject a drug solution by himself or to inject a drug solution in a stable state for a long time (for example, several days).

  The present invention has been made in consideration of such problems, and provides an injection needle set that is easy to operate, and that can stably maintain the injection needle at an appropriate puncture depth for a long period of time. With the goal.

  An injection needle set according to the present invention is an injection needle set including an injection needle body and a needle position defining member, and the injection needle body includes an injection needle, a positioning stopper that contacts the needle position defining member, A return member provided on a side surface of the injection needle and projecting toward the oblique base end side, and the needle position defining member is provided on a penetrating member through which the injection needle can penetrate and a surface in contact with the skin. And the adhesive needle penetrates the penetrating member, and the positioning stopper is positioned in contact with a predetermined position of the needle position defining member, the return member is attached to the penetrating member. It is characterized by engaging.

  Such a needle position defining member is stably fixed to the skin with an adhesive. The injection needle is positioned by a simple operation with the positioning stopper in contact with a predetermined position of the needle position defining member, and since the return member is engaged with the penetrating member, it does not shift in the removal direction. It can be stably maintained at an appropriate puncture depth.

  If the penetrating member is a rubber body, it is suitable for penetrating the injection needle and engaging the return member, and it is inexpensive.

  The needle position defining member may have a tip surface formed non-perpendicular with respect to the axial direction so as to be in contact with the skin obliquely. Thereby, it can inject diagonally according to the kind and purpose of the procedure.

  A flange having a hole through which the injection needle is inserted may be provided between the penetrating member and the adhesive. With such a flange, the injection needle can be stably brought into contact with the skin.

  The flange may bulge around the hole toward the skin. Since the periphery of the hole in the flange bulges toward the skin, the adhesion between the needle position defining member and the skin is improved.

  The penetrating member may be provided with a guide hole for guiding the injection needle. According to such a guide hole, the injection needle can be guided in an appropriate direction at an appropriate position, and the injection needle can easily penetrate the penetrating member.

  In the injection needle set according to the present invention, the needle position defining member is stably fixed to the skin by the adhesive. On the other hand, since the positioning needle is positioned at a predetermined position of the needle position defining member with a simple operation and the return member is engaged with the penetrating member, the injection needle is not displaced in the removal direction. It can be stably maintained at an appropriate puncture depth.

  Hereinafter, an injection needle set according to the present invention will be described with reference to FIGS. In the following description, the upper and lower directions are based on the state shown in FIGS. 1 and 2, but the direction of the injection needle set 10 is not limited in actual use. Moreover, let the upper direction in FIG.1 and FIG.2 be a base end side.

  As shown in FIGS. 1 and 2, the injection needle set 10 includes a syringe (injection needle body) 12 and a needle position defining member 14. The syringe 12 and the needle position defining member 14 may be used as a set at the use stage, even though they are not necessarily set at the stage of distribution and storage.

  The needle position defining member 14 includes a penetrating member 22, an adhesive 26 provided on the lower surface in contact with the skin, and a protective film 28 attached to an adhesive surface below the adhesive 26.

  The penetrating member 22 is made of a material through which an injection needle 16 to be described later can penetrate. For example, a rubber body (silicone rubber, butyl rubber, etc.) is suitable for penetrating the injection needle 16 and engaging the return member, and is inexpensive. is there. As the penetrating member 22, hard foamed polystyrene or soft wood can be used in addition to the rubber body.

  The penetrating member 22 has a cylindrical shape and a moderately large diameter so as to be stable when coming into contact with the skin.

  The adhesive 26 is a thin and soft material that can be penetrated by the injection needle 16, has a larger diameter (for example, approximately twice the diameter) than the penetrating member 22, and is fixed to the penetrating member 22. As the adhesive 26, a rubber-based, acrylic-based, or silicone-based adhesive is used. There are pressure-sensitive hot melt type and cross-linked type. The shape may be a circle, an ellipse, a star, or the like that allows easy understanding of the puncture site. The lower surface of the adhesive 26 is an adhesive surface, and in the initial state, the protective film 28 is stuck and the adhesiveness is maintained. The protective film 28 has a small peel tab 29 bulging so that it can be easily peeled off from the adhesive 26.

  The syringe 12 includes a main body syringe 15, an injection needle 16 provided so as to communicate with the syringe 15, and a plunger 20 that guides the drug solution 17 filled in the syringe 15 to the injection needle 16. The syringe 15 is transparent and has a scale on the side. The chemical solution 17 is broad and includes nutrients and the like. The syringe 15 and the plunger 20 are those used in general syringes.

  As shown in FIG. 3, the injection needle 16 is hollow, has a needle body 30, a hub 32 that supports the needle body 30 and is connected to the syringe 15, and a small circular shape provided at the tip of the hub 32. It has a stopper flange 34 and a return member 36 provided on the side surface of the needle body 30. The injection needle 16 is luer connected to the syringe 15 by a hub 32. The injection needle 16 may be a tapered needle.

  The stopper flange 34 is a positioning stopper that comes into contact with the upper surface of the needle position defining member 14 when puncturing with the syringe 12, whereby the puncture depth of the needle body 30 is accurately defined. The positioning stopper only needs to be in contact with a predetermined position of the needle position defining member 14 so that the injection needle 16 can be positioned. For example, a member extending from the syringe 15 may be substituted.

  As shown in FIGS. 3 and 4, the return member 36 is made of a thin foil and has a plurality of protrusions 38 that protrude toward the oblique base end side. The return member 36 is provided at a position L1 with the stopper flange 34 as a reference. This L1 may be stable if it is about half the thickness L2 of the penetrating member 22. When the length of the needle body 30 is L3, L3-L2 (strictly, the thickness of the adhesive 26, the deformation amount of the penetrating member 22, and the like may be considered) is the puncture depth with respect to the living body. The return member 36 is fixed to the needle body 30 by, for example, laser welding.

  When the injection needle 16 passes through the penetrating member 22 and the stopper flange 34 is positioned in contact with the upper surface of the needle position defining member 14, the return member 36 bites into and engages the penetrating member 22. It will prevent slipping.

  The return member 36 only needs to have a portion protruding toward the oblique base end side. For example, as shown in FIG. 5, the burr 42 generated by appropriately cutting the side surface of the needle body 30 may be used. Good.

  As apparent from FIGS. 1 to 3, the injection needle set 10 has a simple structure. The injection needle set 10 is sterilized in advance or made in a substantially aseptic condition, and is packaged so as to maintain the sterilized condition or the aseptic condition, and is discarded after use by a predetermined method. It is a product. The syringe 12 and the needle position defining member 14 may be individually packaged.

  Next, the operation of the injection needle set 10 configured as described above will be described.

  First, the protective film 28 is peeled off from the adhesive 26 with the peel tab 29 and attached to a predetermined portion of the skin. The needle position defining member 14 is stabilized by the adhesive action of the adhesive 26 and the penetrating member 22 having a reasonably large area, and is fixed in close contact with the skin.

  Next, as shown in FIG. 6, the syringe 12 is pushed down until the stopper flange 34 contacts the upper surface of the needle position defining member 14. Thereby, the injection needle 16 penetrates the penetration member 22, penetrates the adhesive 26, and is punctured into the skin. For example, in the case of subcutaneous injection, the tip of the injection needle 16 further reaches the fat layer 64 through the skin epidermis 60 and dermis 62, but does not reach the muscle tissue 66, and the puncture depth is appropriate. Stop when it becomes long.

  The injection needle 16 is stabilized without the return member 36 biting into and engaging with the penetrating member 22 and being displaced in the removal direction. That is, the injection needle 16 can be prevented from being displaced by the stopper flange 34 and the return member 36 in both the traveling direction and the withdrawal direction. The injection needle 16 is appropriately pressed by the penetrating member 22 and is further stabilized by receiving a frictional force.

  Furthermore, as shown in FIG. 7, the plunger 20 is pushed down moderately. Thereby, the chemical solution 17 is led out to the injection needle 16 and injected into the living body. Here, since the injection needle set 10 is stabilized by the action of the adhesive 26 and the puncture depth of the injection needle 16 is properly maintained, a prescribed amount of the drug solution 17 can be injected to a desired depth. . Moreover, the adhesive 26 becomes a leak-proof, and the chemical | medical solution 17 can be inject | poured correctly.

  In particular, in the case of subcutaneous injection, the tip of the injection needle 16 reaches only the depth of the epidermis 60 or dermis 62, so the distance to the surface of the skin is short, but the adhesive 26 is in close contact with the skin and covers it. It acts as a leak stopper, and the prescribed amount of the drug solution 17 can be accurately injected without the drug solution 17 leaking to the skin surface.

  Furthermore, since the injection needle 16 is stably maintained for a long time by the needle position defining member 14 and is maintained at an appropriate puncture depth, injection can be performed slowly and reliably, and the liquid injection operation can be performed for a long time by a minute amount. Suitable for.

  Therefore, as shown in FIG. 8, a syringe pump 72 may be connected to the injection needle 16 via a tube 70, and the medicinal solution 17 may be injected in a minute amount for a long time. Of course, it can also be applied to infusion. The injection needle 16 may be an indwelling needle (catheter) or the like.

  Thereafter, the syringe 12 and the needle position defining member 14 are removed from the skin, and a series of injection procedures is completed.

  Next, a modified example of the needle position defining member 14 will be described. In each modification, the same components as those of the needle position defining member 14 are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 9, in the needle position defining member 14a according to the first modification, the front end surface of the penetrating member 22 is formed at a non-right angle with respect to the axis J direction so as to contact with the skin obliquely. Has been. Such an injection needle set 10 can be injected obliquely according to the type and purpose of the procedure. The puncture depth can be easily adjusted by puncturing at an angle.

  The penetrating member 22 in the needle position defining member 14a is provided with a guide hole 74 that guides the injection needle 16 along the axis J. According to such a guide hole 74, the injection needle 16 can be guided in an appropriate direction at an appropriate position, and the injection needle 16 can easily penetrate the penetrating member 22.

  The guide hole 74 has a slightly wider opening to facilitate the introduction of the injection needle 16, and the other portion is smaller in diameter than the injection needle 16, and can accurately guide the injection needle 16 without a gap. It is suitable when the injection needle 16 is operated obliquely like the defining member 14a.

  The guide hole 74 should just extend to the location of the distance L1 in the middle of the penetration member 22, for example. The place where the return member 36 is engaged may be a place where the guide hole 74 exists in the penetrating member 22 or may be another place. The guide hole 74 does not need to have a constant diameter, and may have a tapered shape or the like. The guide hole 74 may be a through hole. The guide hole 74 may be any as long as it can guide the injection needle 16 and does not have an extremely small diameter or substantial area and is not recognized as a hole. The guide hole 74 may be at least partially smaller in diameter than the injection needle 16.

  As shown in FIG. 10, the needle position defining member 14 b according to the second modification is provided with a tapered conical cut 76 with respect to the penetrating member 22. In such a needle position defining member 14b, after a series of injection procedures is completed, the upper end connection portion 78 can be cut to remove the inner portion 80 in advance, and the syringe 12 can be easily removed.

  As shown in FIG. 11, the needle position defining member 14 c according to the third modification includes a rigid cylinder 82 that covers the periphery of the penetrating member 22, and a flange 84 provided at the distal end of the penetrating member 22 and the cylinder 82. And have. The adhesive 26 is provided on the lower surface of the flange 84.

  According to the cylindrical body 82, the penetrating member 22 can be protected, and positioning accuracy is further improved by positioning the stopper flange 34 in contact with the upper surface of the cylindrical body 82.

  The flange 84 has a small hole 86 through which the injection needle 16 provided in the center portion is inserted, and a bulging portion 88 in which the periphery of the hole 86 is slightly bulged toward the skin. Since the bulging portion 88 around the hole 86 bulges toward the skin, the bulging portion 88 presses the puncture site appropriately, and the adhesion is improved. The flange 84 and the penetrating member 22 are in contact with each other without a gap. By such a flange 84, the needle position defining member 14c can be stably brought into contact with the skin.

  By providing the cylindrical body 82 and the flange 84, the needle position defining member 14c as a whole is stable even if the penetrating member 22 is small.

  As described above, in the injection needle set 10 according to the present embodiment, the needle position defining member 14 is stably fixed to the skin by the adhesive 26. By a simple operation of pushing the injection needle 16 into the penetrating member 22, the stopper flange 34 is positioned in contact with the upper surface of the needle position defining member 14, and the return member 36 is engaged with the penetrating member 22. Therefore, the injection needle 16 can be stably maintained for a long time and maintained at an appropriate puncture depth. The injection needle set 10 has a simple structure.

  The injection needle set 10 can accurately inject an appropriate amount of drug solution into the instrument with a simple operation. For example, a patient with weak visual acuity or a dexterous hand can inject the drug solution himself.

  Needless to say, the needle position defining members 14, 14a to 14c may be used in combination with their respective characteristic portions. The syringe 12 may be of a prefilled type in which the drug solution 17 is filled in a predetermined amount in advance.

  The syringe according to the present invention is not limited to the above-described embodiment, and it is needless to say that various configurations can be adopted without departing from the gist of the present invention.

It is a section side view of the syringe needle set concerning this embodiment. It is a disassembled perspective view of the injection needle set which concerns on this Embodiment. It is a perspective view of an injection needle. It is a perspective view of a return member. It is a perspective view of the return member concerning a modification. It is a cross-sectional side view of the injection needle set in a state of puncturing a living body. It is a cross-sectional side view of an injection needle set in a state where a chemical solution is injected into a living body. It is a schematic diagram of the injection needle set connected to the syringe pump. It is a section side view of the needle position regulation member concerning the 1st modification. It is a section side view of the needle position regulation member concerning the 2nd modification. It is a section side view of the needle position regulation member concerning the 3rd modification.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Injection needle set 12 ... Syringe 14, 14a-14c ... Needle position regulation member 15 ... Syringe 16 ... Injection needle 17 ... Chemical liquid 22 ... Penetration member 26 ... Adhesive 28 ... Protective film 30 ... Needle main body 32 ... Hub 34 ... Stopper Flange 36 ... Returning member 38 ... Protrusion 74 ... Guide hole 84 ... Flange 88 ... Swelling

Claims (6)

An injection needle set including an injection needle body and a needle position defining member,
The injection needle body includes an injection needle,
A positioning stopper that contacts the needle position defining member;
A return member provided on a side surface of the injection needle and projecting toward the oblique base end;
Have
The needle position defining member includes a penetrating member that can be penetrated while the injection needle is in contact with the needle position defining member;
An adhesive provided on a surface which is fixed so as not to move with respect to the penetrating member or the member holding the penetrating member and is in contact with the skin;
Have
When the injection needle penetrates the penetrating member and the positioning stopper is positioned by contacting a predetermined position of the needle position defining member, the return member is engaged with the penetrating member inside the penetrating member . An injection needle set characterized by: The injection needle set according to claim 1,
The injection needle set, wherein the penetrating member is a rubber body. The injection needle set according to claim 1 or 2,
The needle set is characterized in that the needle position defining member is formed in a non-right angle with respect to the axial direction so that the needle position defining member is in contact with the skin obliquely. In the injection needle set of any one of Claims 1-3,
A syringe needle set comprising a flange having a hole through which the syringe needle is inserted between the penetrating member and the adhesive. The needle set according to claim 4 ,
The injection needle set according to claim 1, wherein the flange is bulged around the hole toward the skin. In the injection needle set according to any one of claims 1 to 5,
An injection needle set, wherein the penetrating member is provided with a guide hole for guiding the injection needle.

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