JPH0910306A - Injection syringe also used as container - Google Patents

Abstract

PURPOSE: To provide an injection syringe also used as a container which is improved in the head of the syringe and is provided with a function capable of nurse aspiration. CONSTITUTION: A syringe head 10 which is attached on one end of a cartridge 11 is provided with a fitting part 13 for fitting to the end part of the cartridge, a rubber stopper fitting part 15 which is arranged forward of the fitting part 13 and to which a rubber stopper is fitted when injection, and a nozzle 16 which is provided forward of the rubber stopper fitting part 15 and is fitted with the needle base of an injection needle. A cylindrical hollow part 20 whose inner diameter is set at an intermediate value between the inner diameter of the rubber stopper fitting part 15 and the inner diameter of the nozzle 16 and which is communicated with them is provided on the syringe head between the rubber stopper fitting part 15 and the nozzle 16.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to Japanese Patent Application No. Sho 53-1581.
No. 43 or Japanese Patent Application No. 61-147223, which is related to the improvement of a syringe that also serves as a container. It is easy to confirm the presence or absence of inflow of blood into the syringe by so-called nurse aspiration at the time of injection and its color. The present invention relates to a container / syringe.

[0002]

2. Description of the Related Art Generally, in injection, which is a medical procedure in which a liquid medicine is directly injected into a necessary site in the body by a syringe, a puncture site is determined depending on the type and efficacy of the drug, or the purpose of use. Intravenous injection, arterial injection,
It is divided into subcutaneous injection and intradermal injection.

Therefore, it is clear that if the puncture site is mistaken, a serious medical accident will be caused, and in order to prevent such a danger, in the medical field, immediately after the injection needle is punctured. Without injecting the drug solution into the above, once pull the plunger rod toward the hand lightly to make the inside of the syringe a negative pressure. With this, if the tip of the injection needle is inside the blood vessel, blood slightly flows into the syringe (flashback), so it can be confirmed that the tip is inside the blood vessel. It is called ration.

In this way, the nurse aspiration is
This is an essential procedure for safe and reliable injection, but in order to perform this procedure, when negative pressure is applied to the injection needle,
The presence or absence of backflow of blood, etc. into the syringe and its color condition must be able to be visually confirmed immediately. For this purpose, it is necessary to easily confirm the presence or absence of inflow and the color condition at the tip of the syringe. Becomes

[0005]

By the way, Japanese Patent Application No. Sho 53
No. 158143 or Japanese Patent Application No. 61-14722
The structure of a conventional container / syringe represented by No. 3 is shown in FIG.
As shown in FIG. 4, at least two rubber stoppers 1 and 2 in the cylinder tip direction and the brim direction are used to hermetically store the drug solution and the drug 3 in the cartridge 4. At the time of injection, the front rubber stopper 1 is replaced with the cartridge 4 of the cylinder tip 5. A vertical groove provided inside the space 6 by moving and fitting the space inside the space 6 having an inner diameter slightly larger than the rubber stopper 1 provided in front of the fitting portion The mechanism 7 guides the drug solution 3 and the like to the injection needle without being disturbed by the rubber stopper 1. In addition, what is shown in FIG. 5 shows a state before the injection needle is attached to the barrel tip 5, and the cap 8 is fitted to the barrel tip 5.

However, in the conventional container / syringe of this kind, one end of the space 6 into which the rubber stopper 1 is fitted is connected to the needle mounting portion, and the other end is a fitting portion with the glass cartridge. Therefore, there is almost no spatial margin to visually check the presence or absence of backflow liquid from the injection needle and the color condition, and for these reasons, improvement has been required to carry out safe injection.

In view of these problems, the present invention is directed to Japanese Patent Application No. 53-158143 or Japanese Patent Application No. 61-14722.
It is an object of the present invention to provide a container-combined syringe having a function of enabling a new nurse aspiration by improving the barrel tip of the container-combined syringe represented by 3 above.

[0008]

According to a first aspect of the present invention, a cylinder tip is fitted to one end of the outer circumference of the cartridge, and a collar portion is fitted to the other end of the cartridge.
The two rubber stoppers are arranged at intervals, and the medicine is enclosed and stored in the inner chamber formed between the rubber stoppers. The barrel tip is a fitting portion that is fitted to the end portion of the cartridge, and the fitting portion. A container provided with a rubber stopper fitting portion which is arranged in front of the rubber stopper and into which the rubber stopper is fitted at the time of injection, and a nozzle which is provided in front of the rubber stopper fitting portion and into which a needle base of an injection needle is fitted. In a dual-purpose syringe,
A cylindrical hollow portion having an inner diameter set between the rubber stopper fitting portion and the nozzle at an intermediate value between the inner diameter of the rubber stopper fitting portion and the inner diameter of the nozzle, and communicating with them. Is provided.

According to a second aspect of the present invention, the outer diameter of the hollow portion is set to be the same as the outer diameter of the collar portion provided on the outer side of the nozzle and provided with the screw portion on the inner circumference. Characterize.

According to a third aspect of the invention, the hollow portion is
It is characterized in that it is formed in a truncated cone shape connecting from the nozzle to the rubber stopper fitting portion.

According to a fourth aspect of the invention, the hollow portion is
It is characterized in that it is divided into a plurality of vertical ribs extending in the radial direction so as to form a fan shape.

According to a fifth aspect of the present invention, at least three rubber stoppers are arranged in the cartridge at intervals, and a plurality of inner chambers are formed between the rubber stoppers.

[0013]

According to the present invention, since the cylindrical hollow portion is provided between the rubber stopper fitting portion and the nozzle at the tip of the cylinder, it is possible to quickly determine the presence or absence of flashback of blood and the color condition during the nurse aspiration. And it can be confirmed easily, and safe and reliable injection can be performed.

[0014]

【Example】

<First Embodiment> FIG. 1 shows a first embodiment of the present invention. Reference numeral 10 in the drawing denotes a cylinder tip fitted to one end of the outer periphery of the cartridge 11. The barrel tip 10 is a cartridge 11
A fitting portion 13 that fits at one end of the fitting, and a rubber stopper fitting portion 15 that is arranged in front of the fitting portion 13 and into which a front rubber stopper 14 is fitted during injection (the front rubber stopper 14 shown in FIG. 1). Shows a state before injection, and is not fitted in the rubber stopper fitting portion 15), and a nozzle 16 provided in front of the rubber stopper fitting portion 14 and fitted with a needle base of an injection needle. A collar portion 18 provided on the outside of the nozzle 16 and provided with a screw portion 18a on the inner periphery thereof
And The threaded portion 18a is a portion to which a flange at the base of the injection needle is screwed, and a threaded portion 18b having a larger diameter than that is formed in front of this threaded portion 18a, and this threaded portion 18b is formed. The base end of the cap is screwed.

A rubber stopper fitting portion 15 of the barrel tip 10
A cylindrical hollow portion 20 is provided between the nozzle 16 and the nozzle 16. The outer diameter of the hollow portion 20 is set to be substantially the same as the outer diameter of the collar portion 18. Further, the inner diameter D of the hollow portion 20 is set to be smaller than the outer diameter of the rubber stopper 14 so that the rubber stopper 14 does not fit therein, and to the extent that the presence of blood can be confirmed during flashback. Specifically, the inner diameter of the rubber stopper fitting portion 15 and the nozzle 16
It is set to an appropriate value in the middle of the inner diameter of. The length L is also set so that the presence of blood can be confirmed during flashback.

A plurality of vertical grooves 15a for guiding the drug in the cartridge 11 to the injection needle side at the time of injection are formed on the inner circumference of the rubber stopper fitting portion 15 so as to be connected to the vertical grooves 15a. Further, a vertical groove 20a is also formed on the inner circumference of the hollow portion 20. Further, although not shown, a collar portion is fitted to the other end of the outer periphery of the cartridge 11, and at least two rubber stoppers are arranged in the cartridge 11 with a space between them. The drug is enclosed and stored in the inner chamber formed in.

Next, the operation will be described. The mechanism of action up to the injection of the injection needle and the outline of the procedure will be described. First, a plunger rod (not shown) is moved forward, and via the liquid medicine filled in the cartridge 11, the direction of the cylinder tip direction in which the liquid medicine is sealed is sealed. The rubber stopper 14 is fitted into the rubber stopper fitting portion 15 of the cylinder tip 10 having the vertical groove 15a on the inner circumference to release the sealing property, and further the plunger rod is pushed to pass through the vertical groove 15a to reach the rubber stopper 14. The drug solution is guided to the injection needle without being disturbed, and then the injection needle is punctured.

Moreover, at that time, as the structure of the cylinder tip 10,
Since the cylindrical hollow part 20 for confirming the flash bag is provided, when the needle is punctured, the plunger rod is pulled lightly once in the direction of the hand to apply negative pressure. If so, the blood will first flow into the hollow portion 20 through the injection needle, whereby it is possible to confirm whether the puncture site is correct or not.

<Second Embodiment> FIG. 2 shows a second embodiment of the present invention. The same components as those of the first embodiment described above are designated by the same reference numerals and the description thereof will be omitted. The same applies to the following examples. In this embodiment, the rubber stopper fitting portion 15 and the nozzle 16 are provided.
A hollow portion 30 formed between and is formed in a truncated cone shape so as to connect the nozzle 16 to the rubber stopper fitting portion 15.

In this embodiment, the mechanism of action of the syringe and the procedure up to the puncture are the same as in the first embodiment, and at the time of nurse aspiration, if the tip of the injection needle is inside the blood vessel, blood will not flow. By passing through the injection needle into the hollow portion 30 for flashback confirmation formed in a truncated cone shape, it is possible to confirm whether or not the puncture site is correct.

<Third Embodiment> FIGS. 3 and 4 show a third embodiment of the present invention. In this embodiment, the hollow portion 40 formed between the rubber stopper fitting portion 15 and the nozzle 16 is divided into a plurality of fans by a plurality of vertical ribs 41 ... Which extend in the radial direction.
As shown in FIG. 3 (b), the vertical ribs 41 are arranged in the intermediate portions of the rubber stopper fitting portions 15 so as to be displaced from the vertical grooves 15 a formed in the inner surface of the rubber stopper fitting portion 15.

According to this embodiment, at the time of nurse aspiration, blood flows through the injection needle into the plurality of flash-back confirming fan-shaped portions 40a, ... Can be confirmed. In particular, in the third embodiment, the hollow portion 40 for flashback confirmation has the first and second embodiments.
Unlike the cylindrical shape or the truncated cone shape of No. 2, since the fan-shaped portions 40a are divided into a plurality of parts, the internal volume thereof is small, and as a result, the amount of residual liquid can be reduced.

In each of the above-mentioned embodiments, the injection needle is attached to the barrel tip by the screw portion 18a provided on the inner circumference of the collar portion 18. However, the present invention is not limited to this, and the injection needle is directly attached, for example. It may have a structure. Further, in each of the above-described embodiments, the present invention has been described with reference to an example in which the two rubber stoppers 14 are arranged in the cartridge 11 and the medicine is enclosed and stored in the inner chamber formed between the rubber stoppers. Without being limited to this, three or more rubber stoppers 14 are arranged in the cartridge 11 with a space between each other, and a plurality of inner chambers formed between the rubber stoppers are provided with a powder drug and a drug solution, or two different kinds of drug solutions. The present invention is also applicable to the case of enclosing and storing. Further, in the third embodiment, the cylindrical hollow portion 40 is divided into a plurality of vertical ribs 41, but the present invention is not limited to this, and the truncated cone-shaped hollow portion shown in the second embodiment is divided into a plurality of vertical ribs. It may be divided. Also, the third
In the embodiment, the fan-shaped portion surrounded by the vertical ribs 41 has a hollow shape, but conversely, the portion having the vertical ribs may have a hollow shape and the fan-shaped portion may serve as a solid support portion. In this case, the vertical groove 15a communicating with the hollow portion is provided at a position deviated from the position shown in FIG. 3 or 4 by 45 degrees in the circumferential direction.

[0024]

According to the first aspect of the present invention, since the cylindrical hollow portion is provided between the rubber stopper fitting portion and the nozzle at the tip of the cylinder, the presence or absence of flashback of blood during nurse aspiration. It is possible to confirm the color condition quickly and easily, and to perform safe and reliable injection.

According to the second aspect of the invention, since the outer diameter of the hollow portion is set to be the same as the outer diameter of the collar portion provided outside the nozzle, the molding is easy and the manufacturing cost is reduced. Reduction and improvement of accuracy can be achieved.

According to the third aspect of the present invention, since the hollow portion is formed into a truncated cone shape connecting from the nozzle to the rubber stopper fitting portion, the flow of the medicine becomes smooth and the inner volume of the hollow portion is reduced. It is also possible to reduce the remaining amount of the medicine.

According to the fourth aspect of the present invention, the hollow portion is divided into a plurality of vertical ribs extending in the radial direction so as to form a fan shape, so that the inner volume of the hollow portion is further reduced. The amount of residual liquid can be further reduced.

According to the fifth aspect of the invention, at least three rubber stoppers are arranged in the cartridge at intervals, and a plurality of inner chambers are formed between the rubber stoppers. It is also possible to store a drug solution or a plurality of different drug solutions separately and mix them at the time of injection.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view of a container / syringe according to a first embodiment of the present invention.

FIG. 2 is a vertical sectional view of a container / syringe according to a second embodiment of the present invention.

3A and 3B show a barrel tip of a container / syringe injector according to a third embodiment of the present invention, wherein FIG. 3A is a longitudinal sectional view, and FIG. 3B is a view on arrow A of FIG.

FIG. 4 is a perspective view of a cylinder tip of the third embodiment.

FIG. 5 is a cross-sectional view showing a conventional example of a container / syringe.

[Explanation of symbols]

 10 Tube Tip 11 Glass Cartridge 13 Fitting Part 14 Rubber Stopper 15 Rubber Stopper Fitting Part 16 Nozzle 18 Collar Part 18a Screw Part 20 Hollow Part 30 Hollow Part 40 Hollow Part 41 Vertical Rib

Claims (5)

[Claims] 1. A cartridge tip (10) is fitted to one end of an outer periphery of a cartridge (11), and a collar portion is fitted to the other end thereof, and at least two rubber stoppers (1) are provided in the cartridge.
4) are arranged at intervals, the drug is enclosed and stored in an inner chamber formed between the rubber stoppers, and the barrel tip is a fitting portion (1) that fits to the end portion of the cartridge.
3) and a rubber stopper fitting portion (15) which is arranged in front of the fitting portion and into which the rubber stopper is fitted at the time of injection.
And a nozzle (16) which is provided in front of the rubber stopper fitting portion and into which a needle base of an injection needle is fitted, wherein the barrel tip has the rubber stopper fitting portion and the nozzle. A cylindrical hollow portion (20) having an inner diameter set to an intermediate value between the inner diameter of the rubber stopper fitting portion and the inner diameter of the nozzle is provided between the nozzle and the nozzle. A syringe that doubles as a container. 2. The container-combined syringe according to claim 1, wherein an outer diameter of the hollow portion is provided outside the nozzle, and an outside of the collar portion (18) provided with a screw portion (18a) on an inner circumference thereof. A container and syringe that is set to have the same diameter. 3. The container / syringe according to claim 1, wherein the hollow portion (30) is formed in a truncated cone shape connecting the nozzle to the rubber stopper fitting portion. 4. The container-combined syringe according to any one of claims 1 to 3, wherein the hollow portion (40) is divided into a plurality of fans by a plurality of radial ribs (41) extending in a radial direction. A container-combined syringe characterized by being used. 5. The container / syringe according to any one of claims 1 to 4, wherein at least three rubber stoppers are arranged at intervals in the cartridge, and a plurality of inner chambers are provided between the rubber stoppers. A container-combined syringe characterized by being formed.