JPS63296768A - Injection assembly - Google Patents

Abstract

PURPOSE:To perform the phleboclysis of a liquid drug in succession after blood- collection, by allowing a blood-collecting needle to communicate with an injection cylinder by thrusting the elastomer of the adapter engaged with the leading end of the injection cylinder of an injection utensil in the blade surface covering the sheath- shaped rubber member of the blood-collecting needle protruding into the recessed space part of a holder. CONSTITUTION:A blood-collecting needle 1 is inserted in a liquid drug tank 6 such as an ampule and a liquid drug 7 is sucked in an injection cylinder 4 by the drawing-up operation of a press element 43. The sucked liquid drug 7 is temporarily preserved in a hermetically sealed state. In blood-collecting work, the blood-collecting needle 1 is replaced to insert a vacuum blood-collecting tube 3 in a holder 2 and the rubber plug 32 thereof is pressed to an introducing, needle 13 to thrust said introducing needle in the rubber plug 32. The blood-collecting needle 1 is thrust in a vein by holding the holder 2 thereof to be connected to a vacuum blood-collecting tube 3. Whereupon, blood to be examined is sucked in the vacuum tube 3. After blood-collecting, the injection cylinder 4 used in the suction of the aforementioned liquid drug 7 is inserted in the holder 2 from which the vacuum blood-collecting tube 3 is pulled off and the phleboclysis of the liquid drug 7 of the injection cylinder 4 can be performed by the pressing operation of the press element 43.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention utilizes a vacuum blood collection IIIL device used to collect test blood for clinical tests, and uses a vacuum blood collection device that leaves the blood collection needle pierced through the blood vessel after blood collection. The present invention relates to an injection assembly for performing secondary treatment such as liquid drug injection.

(Prior art) When blood sampling and intravenous injection are required in succession for a patient's medical examination or treatment, the blood sampling needle and the injection needle must be inserted into the blood vessel separately, which causes pain to the patient. was big. Therefore, in order to eliminate the pain caused by double punctures for such patients and to simplify the needle stick operation, after blood is collected using a syringe, the blood collection needle of the syringe is left in the blood vessel and then injected. Some methods have also been used, such as replacing the tube and injecting the drug.

However, with this method, when changing the syringe,
Blood spills out from the needle base hole of the blood collection needle left in the blood vessel,
Not only can this cause infection if it comes into contact with the hands of workers, but also the needle base hole with ffBI61 is temporarily exposed to the air, which poses a risk of bacterial infection for patients. There were concerns about this, but it was resolved.

For this reason, as a simple and hygienic way to collect blood to be tested, a vacuum blood collection tube that doubles as a sample container is made by sterilizing a glass tube, which has been sterilized and the internal air has been sucked out, and then sealed with a prickable rubber stopper. Equipment is provided.

[Problem that the invention seeks to solve]

However, the above-mentioned vacuum blood collection tube has a unique structure in which the introduction needle is provided in the part corresponding to the needle base hole of the blood collection needle, so this can be used as is for secondary treatment such as replacing the syringe. cannot be done. Under these circumstances, there has been a strong desire for a treatment method that can perform blood collection and injection without changing needles, and that is free from risks such as infection and contamination.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a simple and sanitary injection assembly that can be used to perform intravenous injection of a drug solution or the like after blood collection using the aforementioned vacuum blood collection tube.

[Means for solving problems]

To achieve such an objective, the injection assembly of the present invention comprises a syringe barrel, an elastic body provided at the tip of the syringe barrel, and a pusher having a gasket at the tip that slides inside the syringe barrel. A blood collection needle having blade surfaces at both ends and one end of which is covered by a sheath-like rubber member, and a blood collection needle having a recessed space large enough to allow insertion of the syringe barrel. The holder supports the blood collection needle with one end covered by the sheath-like rubber member protruding into the concave space and the other end exposed to the outside.

[For production]

The elastic body of the adapter fitted to the tip of the syringe barrel of the injection tool is inserted into the blade surface of the blood collection needle that protrudes into the concave space of the holder, covering the sheath-like rubber member, to connect the blood collection needle and the syringe barrel. Then, inject the chemical solution, etc.

〔Example〕

Hereinafter, embodiments of the present invention will be described according to the drawings.

FIG. 1 is an exploded perspective view of an injection assembly according to an embodiment of the present invention, and FIG. 2 is a longitudinal sectional view showing the injection assembly in use.

In the illustrated configuration, as is well known, a vacuum blood collection device is constituted by a blood collection needle 1, a large-diameter cylindrical holder 2 having a concave space, and a vacuum blood collection tube 3. In such a vacuum blood sampler, the blood sampling needle 1 has a needle base 12 having a needle tube (blade surface) 11 on one side and an introduction needle (blade surface) for puncturing a rubber plug on the other side.
13, and the introduction needle 13 is covered with a sheath-like rubber member 14 that sufficiently covers the needle tip. The sheath-like rubber member 14 may be any elastic material such as natural or synthetic rubber.

Further, the holder 2 is usually made of a resin cylinder, preferably transparent, but is not limited to this and may be made of any kind of cylinder.

The holder 2 has a 4#1 structure in which a needle joint part 21 into which the needle base 12 of the blood collection needle 1 is screwed is fitted at one end, and an outer part 823 having a flange base 22 at the other end are integrally fitted together. However, it is not necessarily limited to such a configuration, and any structure may be used as long as it includes at least a needle joint portion 21 to which the blood collection needle 1 can be joined and an outer cylinder 23 having a large diameter. The vacuum blood collection tube 3 consists of a tube body 31 made of a glass tube or the like with one end closed, and a rubber stopper 32 press-fitted into the open end of the tube body 31.
The central part of the needle is made thin (see Fig. 7) so that the tip of a needle such as the poetry introduction needle 13 can be pierced through it, and
The pressure inside the tube body 31 is reduced to a state close to a vacuum.

On the other hand, 4 is a syringe barrel, which has a shape that is thick enough to be inserted into and taken out from the outer cylinder 23 of the holder 2, and has a needle joint a5.
A normal syringe barrel consisting of an outer cylinder 42 having a diameter of 41 and a pusher 43 is applied. In addition, in the embodiment illustrated in FIG.
Although a commonly used injection device is shown, in addition to the injection device having a mid-mouth structure, it is also possible to use one with a horizontal structure under the conditions of use described below. It is. On the other hand, 5 is an adapter, and the adapter 5 includes an elastic body 51 having a configuration similar in shape and function to the rubber stopper 32 in the vacuum blood collection tube 3, and a narrow diameter portion 52 of the elastic body 51 at one end. The connecting ring 53 has a shape that allows the needle joint part 41 of the syringe barrel 4 to fit into the other end of the connecting ring 53. Note that the narrow diameter portion 52 of the elastic body 51 may be formed in a state that it can be fitted into the needle joint portion 41, and the joint ring 53 may be omitted, so that only the elastic body 51 is provided. Therefore, C. Attach the adapter 5 to the needle joint 4I of the syringe barrel 4, insert it into the holder 2, and press the elastic body 51 against the needle tip of the introduction needle 13 of the blood collection needle 1 protruding into the holder 2. Then, as in the case of the vacuum blood collection tube 3, insert the introducer needle 1.
3 pierces the elastic body 51 (see FIG. 2), and the syringe barrel 4 and blood sampling needle 1 are connected.

According to the embodiment having such a configuration, prior to blood collection, after attaching the adapter 5 to the syringe barrel 4 as shown by the chain line V in FIG. 4 and the blood sampling needle 1 (see Figure 2). Next, as shown in FIG.
After sucking the drug solution 7 into the syringe barrel 4 by pulling up the pusher 43, and completing the discharge of air bubbles in the syringe barrel 4 and adjusting the amount of the drug solution, as shown in FIG. The syringe barrel 4 is pulled out from the blood collection needle 1 and its holder 2. With this, the syringe barrel 4 is inserted into the introducer needle 1.
The inhaled medicine t&7 is temporarily stored in a sealed state while the needle hole is occluded by the elastic return of the elastic body 51 which has been removed.

After this preparation stage, blood collection work begins, but at this time, the blood collection needle 1 that was previously used to inhale the drug solution 7 has its needle tube t.
Since some of the drug solution 7 remains in the i, etc., it is discarded and replaced with another unused blood collection needle 1, which is attached to the holder 2.

Incidentally, since the amount of the drug solution 7 remaining in the blood collection needle 1 is very small, depending on the type of the drug solution 7, there is no need to replace the blood collection needle 1.

By replacing the blood sampling needle 1, the introducing needle 13 of the newly installed blood sampling needle 1 is covered with a sheath-like rubber member 14 as shown in FIG. When the vacuum blood collection tube 3 is inserted into the holder 2, its rubber stopper 32 is pressed against the introduction needle, and the introduction needle 13 is pierced, the sheath-like rubber member 14
is pressed by the outer edge of the rubber stopper 32 and becomes wrinkled at the base of the introduction needle 13. Holding the holder 2 of the blood sampling needle 1 to which the vacuum blood sampling tube 3 has not yet been attached, puncture the vein.
The vacuum blood collection tube 3 is joined. As a result, the sample blood is sucked into the vacuum blood collection tube 3 as shown in FIG.

By pulling out the vacuum blood collection tube 3 as shown in FIG. 9 when the suction rupture reaches a predetermined amount, the sample blood is collected in the vacuum blood collection tube 3 in a sealed state, and the blood vessel puncture is stopped. The introduction needle 13 of the blood collection needle 1 left in the state is the rubber stopper 32 at the tip.
The tip of the needle is covered again by the sheath-like rubber member 14 which has elastically returned to its original state when the needle is retreated, so that a sealed state is established and blood droplets from the introduction needle 13 are prevented from flowing out.

After blood collection has been completed and in the state described in 1E, the syringe 4 into which the drug solution 7 has been inhaled is inserted into the holder 2 from which the vacuum blood collection tube 3 has been removed, as shown in FIG. After the injection n4 and the blood collection needle 1 are connected to each other while the elastic body 51 is penetrated by the elastic body 13, as shown in FIG. It can be performed. After the injection is completed, the blood collection needle 1 and the holder 2 are removed from the blood vessel, thereby completing the entire operation. (See FIG. 12) [Effects of the Invention] As described above, according to the injection assembly of the present invention, the vacuum blood collection tube is used to leave the blood collection needle together with its holder in the state of penetrating the blood vessel after blood collection. Then, the syringe with an elastic body filled with a drug solution in advance and the vacuum blood collection tube after the blood collection are exchanged by inserting each rubber stopper into the introduction needle in the holder, so blood collection and injection can be performed using a single blood collection needle. It can be performed with just 11 blood vessel punctures, reducing the pain associated with each blood vessel puncture, and the vacuum blood collection tube and syringe can be exchanged within the holder. In addition to being extremely effective, there is no risk of contamination of the needle with bacteria when replacing the needle, which is extremely effective for both patients and workers. In addition to being effective, it is also an extremely practical method with good workability.

Furthermore, according to the present invention, by providing an elastic body made of a rubber stopper structure similar to the rubber stopper in a vacuum blood collection tube, it becomes possible to easily connect the syringe barrel to a blood collection needle within the holder. Therefore, the present invention has many practical advantages, such as the ability to attach secondary treatment instruments such as blood collection ITL instruments other than vacuum blood collection tubes using the elastic body.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of an embodiment of the present invention, Fig. 2 is a longitudinal cross-sectional view of the main part showing the syringe in use, and Fig. 3 shows an injection device used in a conventional method. An illustrative perspective view, FIG. 4 is a perspective view showing the syringe used in the present invention in a state in which the adapter is attached, and FIGS. 5 and 6 are perspective views and side views showing the suction of the drug into the syringe and its completion state. 7 is a partially cutaway side view showing the state in which the vacuum blood sampling IiL device is used, FIGS. 8 and 9 are perspective views showing the state in which blood is collected by the vacuum blood collecting device and its completed state, and FIG. 1O. 11 is a perspective view showing the procedure for mounting the syringe barrel in the present invention;
Figures 1 and 12 are perspective views showing the injection state and finished state of the syringe, respectively. l・--Blood collection needle 2--Holder 4--
--Syring barrel 5--Adapter (elastic body) ■--Needle tube (blade surface) 13--Introducing needle (blade surface) 14--One sheath-shaped rubber member 43--One push r51--
-elastic body

Claims (1)

[Claims] (1) An injection tool consisting of a syringe, an elastic body provided at the tip of the syringe, a pusher with a gasket at the tip that can slide inside the syringe, and a pusher with blades at both ends. A blood collection needle having one end covered by a sheath-like rubber member, and a concave space large enough to allow the syringe to be inserted into the blood collection needle; An injection assembly comprising: a holder that supports the blood collection needle in a state in which the needle protrudes into the concave space and the other end is exposed to the outside.