JP2756193B2 - Injection needle and syringe - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a medical injection needle and a syringe, and more particularly to a double-edged injection needle used for a prefilled syringe and a syringe provided with the injection needle.

[0002]

2. Description of the Related Art Conventionally, when a medical solution is administered to a human body using a syringe already filled with the medical solution, that is, a so-called prefilled syringe, a conventional double-edged needle as shown in FIG.
(1) is used. However, with this type of double-edged needle, blood is secured in the syringe when administering blood (pulling the plunger and checking the backflow of blood to determine whether the injection needle has been inserted into the blood vessel) I don't know until it comes in. In the case of a normal injection needle, the blood can already be confirmed in the space (6) shown in FIG. 2, and the blood vessel can be confirmed.

On the other hand, when a radiopharmaceutical containing a radioisotope is administered to a patient, a lead glass (9) as shown in FIG. A lead shielded body (hereinafter abbreviated as a syringe shield) is used. When the radiopharmaceutical solution in the prefilled syringe is administered using this syringe shield, blood will be checked through the lead glass, but the lead glass itself is not colorless and transparent but has a yellow tint, and The inside of the body is dark and very difficult to see. Therefore, it takes time to secure the blood vessels, and the unnecessary exposure of the practitioner increases. Also, if it is necessary to rely on the intuition of doctors and nurses instead of confirming the securing of blood vessels in order to avoid unnecessary exposure, if administration fails, the patient will be exposed to unnecessary exposure. Will be forced.

[0004] Therefore, we first invented a method for confirming the securing of blood vessels in the same part as the space (6) of the ordinary luer needle shown in Fig. 2 and outside the syringe shield.

That is, two types of special injection needles (hereinafter referred to as double luer needles) as shown in FIGS. 4 and 5 have been invented, and a widely used disposable needle can also be used. I thought about a method that can confirm the blood. However, in the case of FIG. 4, the lure cap (2), the double luer needle (10) and the disposable needle are tripled, so that the length of the injection needle becomes longer, and consequently the administration becomes difficult. Further, in the case of FIG. 5, it is technically difficult to firmly fit the double luer needle (11) and the luer cap (2). Turned out to be poor.

[0006]

SUMMARY OF THE INVENTION The present invention completely eliminates the above-mentioned disadvantages, has a short injection needle portion, is easy to mount,
It is an object of the present invention to provide a special injection needle for easily confirming the securing of a blood vessel and a syringe equipped with the injection needle.

[0007]

An injection needle according to one aspect of the present invention is used for a prefilled syringe, and has a blade cut at both ends of the needle, which is a chemical solution passage, in a direction intersecting the axial direction of the needle. A first inflow needle provided with the blade at one end inserted into the body; a second inflow needle provided with the blade at one end inserted into the syringe; The other end of each of the inflow needle and the second inflow needle is separated and held, and the other end of the first inflow needle is communicated with the other end of the second inflow needle via a closed space. A transparent blood confirmation unit, wherein the blood confirmation unit is a luer attached to the prefilled syringe, and the other end of the first inflow needle is held in advance by the luer and the second inflow needle The other end of the needle is held in the lure by being inserted into the lure Has a lifting portion, the second inlet needle by the holding portion is held in the luer part is characterized by extending into the pre-filled syringe side along the axial direction of the luer part.

[0008] In another aspect of the present invention, a syringe comprises:
The injection needle according to any one of claims 1 to 4 is mounted on a prefilled syringe.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An injection needle (sometimes referred to as a double-edged needle or a special double-edged needle) and a syringe according to an embodiment of the present invention will be described below with reference to the drawings. In this embodiment, the lure unit (13) corresponds to the one that fulfills the function of the blood check unit.
The present injection needle is characterized by providing a space above the Luer taper of a conventional double-edged needle (1) currently commercially available as shown in FIG. Specifically, for example, it is characterized by having components selected from the following two types. B) A space (6) is left in a part of the inside of the luer taper holding the first inflow needle (12) corresponding to the same kind of injection needle as a general disposable needle, and the second inflow needle (15) in FIG. The disposable needle-type first inflow needle (12) is attached to the inside of a luer taper holding plastics. B) A part in which a space (17) is provided in a part of the transparent luer is integrally molded, and then two inflow needles are vertically bonded while leaving a part of the space. Preferably, the plastics are attached to each other by ultrasonic welding, so that the plastics can be miniaturized and securely bonded. By doing so, it is possible to provide a special injection needle that has a short injection needle portion, is easy to mount, and can easily secure a blood vessel.

This will be described more specifically. In FIG. 6, those excluding the holding portion (14) and the second inflow needle (15) are almost the same as those of a commercially available disposable needle, and are manufactured by the same method.

However, there is a space into which the inflow needle of the double-edged needle is to be inserted, and a detachment preventing rib (16) is provided to prevent the inflow needle from being easily detached after it is inserted.
A space (17) was provided by inserting the second inflow needle (15) of FIG. 7 separately prepared into this needle and bonding between the lure part (13) and the holding part (14) of FIG. In this way, the intended special double-edged needle can be obtained.

[0012]

[0013]

Further, the luer member may be made of plastic, and the adhesive between the first inflow needle and the luer portion and the second inflow needle and the holding portion is widely used for ordinary disposable needles. An adhesive is used, and between plastics, an adhesive that is usually used for bonding plastics is used.However, preferably, bonding by ultrasonic welding is used to minimize the effect of the adhesive on the chemical solution. More preferred.

The size and length of the space where blood can be seen are not particularly limited as long as the object can be achieved.

When the above-mentioned special double-edged needle is used, the special double-edged needle shown in FIG. 6 will be described. The special double-edged needle is attached to a luer cap (2) of a prefilled syringe by pressing as shown in FIG. By mounting the plunger (20) on the piston member (19), preparation for use as a syringe is completed.

The exemplification of this embodiment is merely for explanation, and is not intended to limit the technical idea of the present invention.

[0018]

According to the injection needle of the present invention, the length of the double-sided injection needle in the conventional disposable needle is almost as short as the total length of the injection needle, and the disposable needle is pressed once against the prefilled syringe. And the preparation for use as a syringe is completed.
In particular, when the injection needle of the present invention is mounted on a prefilled syringe, confirmation of blood vessel securing can be easily performed at the blood confirmation section.For example, when administering a radiopharmaceutical, use of this injection needle The radiation exposure of the practitioner can be reliably reduced.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a device equipped with a prefilled syringe and a conventional double-edged needle.

FIG. 2 is a cross-sectional view of a device equipped with a normal syringe and a syringe needle.

FIG. 3 is an external perspective view of a syringe shield.

FIG. 4 is a cross-sectional view of an improved double luer needle attached to a prefilled syringe.

FIG. 5 is a cross-sectional view of an improved double luer needle attached to a prefilled syringe.

FIG. 6 is a sectional view of an injection needle according to one embodiment of the present invention.

FIG. 7 is a sectional view of the lower needle part in FIG. 6;

FIG. 8 is an assembled cross-sectional view showing a state in which the injection needle according to one embodiment of the present invention is mounted on a prefilled syringe and is ready for use as a syringe.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Conventional double-edged needle 13 Luer part 2 Luer cap 14 Holder 4 Injection cylinder 15 Second
Inflow needle 6 Space 16 Detachment prevention rib 9 Lead glass 17 Space 10 Double luer needle 19 Piston 11 Double luer needle 20 Plunger 12 First inflow needle

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-58-27564 (JP, A) JP-A-57-109838 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) A61M 5 / 32,5 / 158

Claims (5)

(57) [Claims] 1. An injection needle which is used in a prefilled syringe and has blades cut at both ends of a needle, which is a drug solution passage, in a direction intersecting with the axial direction of the needle, and one end inserted into a body. A first inflow needle (12) provided with the blade, a second inflow needle (15) provided with the blade at one end inserted into the syringe, the first inflow needle and the second inflow needle A transparent blood confirming portion (13) in which the other end of the first inflow needle is separated and held, and the other end of the first inflow needle is communicated with the other end of the second inflow needle via a closed space. Wherein the blood confirming unit is a luer attached to the prefilled syringe, the other end of the first inflow needle is held in advance by the luer, and the other end of the second inflow needle is provided. Has a holding portion (14) that is inserted into the lure portion and held by the lure portion. Needle the holding portion, characterized in that extending the second inflow needle along the axial direction of the luer part into the prefilled syringe side by being held in the luer part. 2. A detachment preventing rib (16) provided on the lure portion for preventing the holding portion inserted into the lure portion from detaching from the lure portion. The injection needle as described. 3. The injection needle according to claim 1, wherein the luer portion and the holding portion are made of a plastic material. 4. The injection needle according to claim 3, wherein said luer portion and said holding portion are ultrasonically welded. 5. A syringe, wherein the injection needle according to any one of claims 1 to 4 is mounted on a prefilled syringe.