JP4013248B2 - Mixed injection tool - Google Patents

Description

[0001]
[Technical field to which the invention belongs]
The present invention relates to a mixed injection device used for performing a mixed injection operation for introducing a drug solution in a syringe from a mixed injection port of a transfusion set or a transfusion set safely and hygienically.
[0002]
[Prior art]
When transfusion or blood transfusion is performed, an operation of mixing another drug solution with a preset solution is generally performed. This mixed injection operation is usually performed from a mixed injection port provided in advance in the infusion set or blood transfusion set. A common co-injection port is formed by attaching a rubber stopper in a liquid-tight manner to an opening of a container in which a liquid is stored. In general mixed injection operation, a syringe needle is connected to the tip of a syringe containing a drug solution to be mixed, and a rubber stopper is punctured with the needle, thereby communicating the inside of the syringe with the inside of the infusion set or blood transfusion set. This is done by injecting the chemical solution inside.
If the chemical solution to be mixed is not aseptic, the mixed injection may be performed through a sterilization filter. The sterilization filter is connected to the tip of a syringe during a mixed injection operation, and is further used by connecting an injection needle through the filter.
[0003]
However, in such a conventional mixed injection operation, not only a medical worker who performs the mixed injection operation may cause erroneous injection of the injection needle, but also the operation itself is difficult because the syringe is unstable during the mixed injection operation. there were. In addition, if the syringe is removed from the co-infusion port after the co-infusion operation has been completed, the internal liquid may leak out from the puncture hole left in the rubber stopper, or external bacteria may enter the inside. During the transfusion procedure, the syringe had to be kept connected to the mixed injection port.
[0004]
[Problems to be solved by the invention]
In view of the above circumstances, an object of the present invention is to provide a co-injection device that allows removal of a syringe without using a syringe needle and without the risk of liquid leakage or mixed bacteria during the co-infusion operation.
[0005]
[Means for Solving the Problems]
As a result of various earnest studies to solve the above problems, the present inventors have connected a mixture injection tool having a sterilization filter and a check valve inside, and having a sharp cutting edge at the tip to the syringe tip, and a mixture injection port It has been found that not only can the above-mentioned problems be solved by performing puncture on the eye, but also a co-infusion device that allows multiple co-infusion operations can be provided.
[0006]
That is, the present invention includes a main body having a communication path therein, a sterilization filter and a check valve provided so as to block the communication path, and the main body has a syringe connection portion at one end. The syringe connecting portion is provided with a liquid inlet that communicates with the communication passage, and the rubber plug puncture portion is a fluid that communicates with the communication passage. This is a mixed injection device provided with an outlet.
[0007]
[Action]
Since the mixed injection device of the present invention has a sharp cutting edge at the tip, it is not necessary to connect an injection needle to the syringe, and it is also possible to puncture only the mixed injection device into the mixed injection port in advance. Therefore, the risk of erroneous puncture by medical staff is greatly reduced.
Further, since the mixed injection device has a sterilization filter and a check valve in the communication path inside the main body, even if the syringe is removed after the injection of the mixed injection chemical solution, there is no possibility of liquid leakage or invasion of bacteria.
Furthermore, since the mixed injection device can be used a plurality of times, it is possible to perform additional injection of a chemical solution, mixed injection operation of other chemical solutions, and the like.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the mixed injection device of the present invention will be described in detail based on preferred embodiments shown in the accompanying drawings, but the present invention is not limited to these descriptions.
FIG. 1 is a cross-sectional view showing an embodiment of the co-infusion device of the present invention, and FIG. 2 is a cross-sectional view showing another embodiment of the co-infusion device of the present invention. Moreover, FIG. 3 is explanatory drawing of the usage example of the mixed injection tool shown in FIG. As shown in FIGS. 1 and 2, the co-infusion device 1 of the present invention includes a main body 2, a sterilization filter 3, and a check valve 4.
[0009]
The main body 2 of the mixed injection device 1 of the present invention has a syringe connecting portion 21 that can be directly connected to the tip of a syringe at one end, and can puncture a rubber stopper of a mixed injection port such as an infusion set or a blood transfusion set at multiple ends. A rubber plug puncture portion 22 is provided.
The syringe connector 21 has a shape and a size that can be fitted to the syringe tip so that the syringe and the mixed injection device 1 are not easily detached when the syringe tip containing the drug solution to be mixed is inserted. It has a lumen. Therefore, it is preferable that the lumen has a tapered shape whose inner diameter can be gradually reduced toward the inside of the main body. Further, when a syringe with a lock mechanism is connected and used, the syringe connection portion 21 may be provided with a means for engaging with the syringe tip, such as a locker-shaped female luer shape.
The rubber plug puncture portion 22 has a sharp cutting edge that can pierce the mixed injection device 1 into a rubber plug of a mixed injection port such as an infusion set or a blood transfusion set, and a full length that is sufficient to penetrate the rubber plug. It becomes. The shape of the blade edge is not particularly limited as long as it can puncture a rubber stopper, but it is preferably one having lower puncture resistance, and the same shape as the tip shape of the injection needle is preferably used. The rubber plug puncture portion 22 has an inner diameter that allows quick introduction of a medicinal solution to be mixed, has an outer diameter that can reduce puncture resistance to the rubber plug, and breaks or droops when puncturing the rubber plug. It must have a thickness that is not feared. Therefore, these dimensions of the rubber plug puncture portion 22 can be appropriately changed depending on the type and amount of the chemical solution and the material of the rubber plug.
[0010]
A communication passage 23 is provided inside the main body 2 so that the inner side and the outer side of the rubber plug can communicate with each other when the co-infusion device 1 of the present invention is punctured into the rubber plug. The syringe connection part 21 is provided with a liquid inlet 211, the rubber stopper puncture part 22 is provided with a liquid outlet 221, and the communication path 23 connects the liquid inlet 211 and the liquid outlet 221 at both ends. The main body 2 is provided as follows. Therefore, when the mixed injection device 1 of the present invention is used, the chemical solution in the syringe flows into the communication path 23 from the liquid inlet 211, passes through the rubber plug portion, and flows out from the liquid outlet 221. Is done.
[0011]
The liquid inflow port 211 is to introduce the chemical solution into the communication path 23 without leaking when the chemical solution in the syringe is injected from the syringe tip connected to the syringe connector 21. Therefore, it is preferable that the liquid inflow port 211 communicates with the lumen of the syringe connection portion 21 and it is more preferable that the liquid inlet 211 is provided at an end of the lumen on the inner side of the main body because there is no possibility of leakage of the chemical liquid.
The liquid outlet 221 is for introducing the chemical introduced into the communication passage 23 to the other side of the rubber plug when the co-injection device 1 is punctured by the rubber plug. That is, the liquid outlet 221 is provided in a portion of the rubber plug puncture portion 22 that protrudes beyond the rubber plug through the rubber plug. Therefore, the liquid outlet 221 is preferably provided at the tip of the rubber plug puncture portion 22. As a specific example of the liquid outlet 221, as shown in FIG. 1, a hole provided toward the tip of the rubber plug puncture portion 22 is provided. Another specific example of the liquid outlet 221 is a hole provided on the side surface of the distal end of the rubber plug puncture portion 22 as shown in FIG.
[0012]
In addition, the flange part 24 is provided in the base end side of the rubber plug puncture part 22 of the main body 2 so that the mixed injection tool 1 may be reliably arrange | positioned in the position which can mix and mix the chemical | medical solution in a syringe as mentioned above. Is preferred. According to this structure, since the co-infusion device 1 is punctured until the flange portion 24 comes into contact with the co-infusion port, the liquid outlet 221 passes through the rubber plug and is disposed on the other side of the rubber plug. There is no need to confirm an appropriate insertion position for the mixed injection operation while puncturing the mixed injection device 1.
The mixed injection device 1 is provided with a locking means for holding the mixed injection device 1 so as not to easily fall off from the rubber stopper after the chemical solution in the syringe is once securely disposed at a position where it can be mixed and injected. May be. As the locking means, for example, as shown in FIGS. 1 and 2, there is a tapered protruding portion 25 whose diameter decreases toward the sharp distal end side of the rubber plug puncture portion 22. By providing the locking means, the mixed injection device 1 not only prevents accidental dropping from the mixed injection port during the mixed injection operation with the syringe connected, but also when the syringe is removed after completion of the mixed injection operation. It is also possible to prevent the mixed injection device 1 from being accidentally dropped from the mixed injection port.
[0013]
A thermoplastic resin such as polyethylene, polypropylene, polyvinyl chloride, polycarbonate, or ABS resin is used as the material constituting the main body 2 of the mixed injection device 1. The main body 2 can be molded by a molding method using a known thermoplastic resin, but is preferably molded by injection molding. The main body 2 may be a single component, but preferably has two components as will be described later. When the main body 2 has two parts, each part is joined and integrated by ultrasonic welding or heat welding after molding.
[0014]
A sterilization filter 3 is provided in the communication passage 23 of the main body 2. The sterilization filter 3 prevents the entry of bacteria in the chemical solution when a non-sterile chemical solution is mixed, or prevents the entry of the bacteria from the mixed injection port after removing the syringe after completion of the mixed injection operation. Is. As the sterilization filter 3, a filter formed from a synthetic resin such as cellulose acetate, regenerated cellulose, cellulose ester, polyamide, polysulfone, or polyethersulfone is used. The pore diameter of the filter 3 is preferably 0.45 μm or less, more preferably 0.2 μm or less.
The sterilizing filter 3 is provided so as to block the communication path 23 between the liquid inlet 211 and the liquid outlet 221. When the main body 2 is composed of two parts as shown in FIG. 1 or FIG. 2, it is preferable that the filter is sandwiched between the two parts at the time of joining the two parts because of easy molding.
[0015]
A check valve 4 is further provided in the communication passage 23 of the main body 2. The check valve 4 is for preventing leakage of the liquid inside the mixed injection port after removing the syringe after completion of the mixed injection operation. As the check valve 4, a duckbill type, umbrella type or tube type is preferably used.
The check valve 4 is provided in the communication passage 22, but the position thereof may be on the liquid inlet 211 side or the liquid outlet 221 side of the sterilization filter 3. Further, when the rubber plug puncture portion 22 has a liquid outlet 221 on the side as shown in FIG. 2, the check valve 4 may be provided at the liquid outlet 221, In this case, the shape of the check valve 4 is preferably a tube type.
[0016]
The mixed injection device 1 of the present invention is provided with the check valve 4 so that, in addition to the usage method of puncturing the mixed injection port after connecting the syringe, only the mixed injection device 1 is previously mixed injection port such as an infusion set or a blood transfusion set. A method of using a syringe by connecting a syringe and performing a mixed injection operation after puncture is also used. Thereby, the possibility of erroneous puncturing due to puncturing in an unstable state with the syringe connected can be reduced, and the mixed injection operation can be performed more safely.
[0017]
Next, the usage method of the mixed injection device 1 of this invention is demonstrated using FIG. Here, among the above-described usage methods, only the usage method for puncturing the mixed injection port after connecting the former syringe will be described, but the usage method for puncturing only the latter mixed injection device in advance is also used for syringe connection. Only the order is different, and the actions and effects are the same.
First, the syringe connection part 21 of the mixed injection device 1 and the tip of the syringe 51 containing the mixed injection drug solution are fitted, and the mixed injection device 1 is connected to the syringe 5 (FIG. 3A). Next, the rubber plug puncture portion 22 of the mixed injection device 1 to which the syringe 5 is connected is inserted into the rubber plug 61 of the mixed injection port 6 and pushed in until the flange portion 24 of the mixed injection device 1 comes into contact with the surface of the rubber plug 61 (FIG. 3). (B)). In this state, the rubber plug puncture portion 22 of the co-injection device 1 penetrates the rubber plug 61 and protrudes beyond the rubber plug 61, and the liquid outlet 221 is also positioned beyond the rubber plug 61. Further, the protruding portion 25 serving as a locking means prevents the mixed injection device 1 from dropping from the rubber stopper 61. Here, by pushing the plunger 52 of the syringe, the drug solution in the syringe flows into the communication path 23 from the liquid inlet 211 and flows out of the liquid outlet 221 located inside the mixed injection port 6, and the inside of the infusion set or blood transfusion set (Fig. 3 (c)). When the mixed injection operation is completed, only the syringe 5 is removed while the mixed injection device 1 is punctured into the mixed injection port 6. Further, when separately injecting a chemical solution, the tip of the syringe 51 of the syringe 5 containing the chemical solution is connected to the syringe connecting portion 21 of the mixed injection device 1 and the same operation is repeated. Since the co-infusion device 1 is finally discarded together with the infusion set or the transfusion set after the end of the infusion processing or the transfusion processing, there is no possibility of erroneous puncture or infection associated with the disposal processing.
[0018]
【The invention's effect】
Since the mixed injection device of the present invention has a sharp cutting edge at the tip and includes a sterilization filter and a check valve, an operation for connecting an injection needle to a syringe is not required as in the conventional mixed injection operation. In addition, after the mixed injection operation, the mixed injection device having a sharp cutting edge is left in the mixed injection port, and only the syringe is removed, so that the mixed injection device is discarded together with the infusion set or the blood transfusion set including the mixed injection port. There is no risk of puncture and infection.
In addition, the mixed injection device can puncture the mixed injection port before connecting the syringe, thereby reducing the risk of erroneous puncturing by the medical staff. It should be noted that even if the syringe is removed from the mixed injection device after the mixed injection operation, liquid leakage or bacteria intrusion does not occur, and the mixed injection operation can be performed again by connecting the syringe to the mixed injection device. Further, unlike the conventional mixed injection operation, it is not necessary to hold the syringe in the mixed injection port even after the completion of the mixed injection, and the mixed injection operation can be performed more easily.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing an embodiment of a mixed injection device of the present invention.
FIG. 2 is a cross-sectional view showing another embodiment of the co-infusion device of the present invention.
FIG. 3 is an explanatory view of an example of use of the mixed injection device shown in FIG. 2;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Mixed injection tool 2 Main body 21 Syringe connection part 211 Liquid inflow port 22 Rubber plug puncture part 221 Liquid outflow port 23 Communication path 3 Bacteria elimination filter 4 Check valve

Claims (1)

A main body having a communication path inside, a sterilization filter and a check valve provided so as to block the communication path, the main body having a syringe connection portion at one end, and the other end The syringe plug has a liquid inlet that communicates with the communication passage, and the rubber stopper puncture portion has a liquid outlet that communicates with the communication passage. The rubber plug puncture portion has a sharp cutting edge at the tip, a liquid outlet is provided on a side surface, and the check valve is a tube type reverse valve provided at the liquid outlet. A mixed injection device characterized by being a stop valve.

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