JP4110135B2 - Plug for mixed injection - Google Patents

Description

  The present invention relates to a mixed injection plug used by being connected to a needle base or an infusion line of an indwelling needle.

  Conventionally, when infusion to a patient is interrupted for a long time, a mixed injection plug can be connected to the needle base of the indwelling needle so that the infusion can be resumed without puncturing the patient with the indwelling needle again. Has been done. This mixed injection plug has a cylindrical plug body having a male luer portion that can be fitted to the needle base of an indwelling needle on the tip side, and a plug body made of an elastic material that seals the opening on the tail end side of the plug body. And a cap that is fitted on the plug body to prevent the plug body from falling off (see, for example, Patent Document 1). When the drip or the like is resumed, the stopper is punctured with an injection needle.

  Another example of use of the mixed injection plug is one connected to an infusion line composed of a plurality of infusion tubes. This mixed injection plug is, for example, a branch formed so as to extend radially outward at the center of the peripheral wall portion of the plug body in addition to the configuration of the mixed injection plug of the type connected to the needle base of the indwelling needle. A pipe is provided, and a male luer part is formed at the open end of the branch pipe (see, for example, Patent Document 2). Then, an infusion tube is connected to the two male lures, and an injection needle is punctured into the plug so that the medicinal solution can be mixed and injected into the fluid flowing through both infusion tubes. This mixed injection plug is also configured so that a cap is fitted on the plug body to prevent the plug body from falling off.

Here, in the mixed injection plug of the type connected to the needle base of the indwelling needle, there is a possibility that the indwelling needle or the mixed injection plug may fall off when the patient hooks clothes or hands. For this reason, it is desirable to make it difficult for the patient to hook clothes or the like by miniaturizing the mixed injection plug as much as possible. However, with conventional mixed injection plugs, the plug body is inserted into the plug body, and the cap is fitted to the plug body. Becomes very difficult. In addition, since the conventional co-injection plug including the co-infusion plug of the type connected to the infusion line is provided with a cap for preventing the stopper from coming off, the number of parts increases and the cost increases.
Japanese Patent Publication No. 6-26586 (2nd page, Fig. 2) Japanese Utility Model Publication No. 3-83552 (Pages 2-3 and 7, page 1)

  SUMMARY OF THE INVENTION In view of the above, an object of the present invention is to provide a co-injection plug that can reduce the number of parts to reduce the cost and can be reduced in size.

To achieve the above object, mixed injection plug of the present invention includes a cylindrical plug body, the mixed injection plug and a plug body made of an elastic material for sealing the opening of the tail end side of the plug body, wherein A plurality of ribs project from the outer peripheral surface of the peripheral wall portion of the opening with a circumferential interval, and a plurality of radial through holes are formed so as to open at the bottom of the groove between the plurality of ribs, elastic material as Nde write enters in the through-hole to the opening protrudes to the outer peripheral surface of the peripheral wall portion of the plug body in said groove is injected, characterized in that the plug body is formed.

  According to such a configuration, since the plug body is formed by injecting an elastic material into the opening on the tail end side of the plug body, the plug body is inserted into the plug body like a conventional mixed injection plug. There is no need to assemble. Further, in the conventional product, the plug body is molded and then inserted into the plug body. However, according to the present invention, the plug body can be molded and attached to the plug body at the same time. Further, since the elastic material is injected into the opening so as to enter the through hole, the plug formed by the elastic material is engaged with the through hole. Therefore, it is possible to prevent the plug body from falling off the plug body even if the cap is not provided. Therefore, unlike the conventional product, there is no need to insert and assemble the plug body into the plug body, making it easier to manufacture the plug for co-infusion and eliminating the need for a cap, reducing the number of parts and reducing costs. In addition, it is possible to further reduce the size of the mixed injection plug.

Here, when injecting a resilient material so that even enter into the through-hole to the opening of the tail end side of the plug body, so as to protrude on the outer peripheral surface of the peripheral wall portion of the plug body is an elastic material flows out from the through hole Therefore , the portion of the elastic material that protrudes from the through hole to the outer peripheral surface of the peripheral wall functions as an anchor. For this reason, it can prevent more reliably that a plug main body and a plug body engage firmly, and a plug body falls off from a plug main body. However, since the outer peripheral surface of the peripheral wall portion is a portion that is gripped with a finger when the mixed injection plug is connected to the needle base or infusion line of the indwelling needle, if there is an elastic material, the elasticity of the elastic material The force of the finger is not directly transmitted to the plug body due to the force, and if a strong force is applied, the elastic material may be cut off, resulting in poor connection operability.

However, in the present invention, a plurality of ribs project from the outer peripheral surface of the peripheral wall portion of the opening with a circumferential interval, and the through holes are opened at the bottom of the groove portion between the ribs. since the elastic material over the respective groove portions are injected, the anchor effect can be obtained by the injected elastic member in the groove, the peripheral wall of the opening can be firmly gripped in the ribs. For this reason, the operability of the connection can be kept good, which is advantageous.

  Further, a stepped portion having a reduced diameter is formed on the inner peripheral surface of the peripheral wall portion of the opening so as to be positioned ahead of the formation position of the through hole, and the tip of the plug is engaged with the stepped portion. By doing so, when the injection needle is punctured into the plug body, it is possible to prevent the plug body from moving further toward the plug body, which is advantageous.

  Here, when the mixed injection plug is connected to the needle base of the indwelling needle placed in the patient, it is necessary to prevent blood from coagulating and forming a thrombus. For this purpose, the mixed injection plug may be placed on a work table with its tail end face down, and the mixed injection plug may be filled with a blood coagulation inhibitor such as heparin or physiological saline. At this time, if the tail end surface of the plug body comes into contact with the work table, it is not preferable for hygiene to use as it is, and it is necessary to disinfect the tail end surface of the plug body before puncturing the injection needle into the plug body, It is troublesome.

  In this case, a flange portion projecting radially inward is formed at the tail end of the peripheral wall portion of the opening, and the plug body is placed so that the tail end surface of the plug body is flush with the inner surface of the flange portion. If the outer peripheral edge portion of the tail end surface of the plug body is engaged with the flange portion, the tail end surface of the plug body is still on the work table even if the mixed injection plug is placed on the work table as described above. Do not touch. For this reason, the tail end surface of the plug can be kept clean, which is advantageous. In addition, if configured as described above, the outer peripheral edge of the tail end surface of the plug is engaged with the flange, so that when the injection needle punctured into the plug is pulled out, the plug is connected to the tail of the plug body. This is advantageous because it can be more reliably prevented.

  An embodiment of the present invention will be described with reference to FIGS. FIG. 1 is an explanatory view showing a use state of a mixed injection plug according to an embodiment of the present invention, FIG. 2 is a sectional view of the mixed injection plug of the embodiment, and FIG. 3 is an explanatory view showing a manufacturing method of the mixed injection plug of the embodiment. FIG. 4 is an explanatory diagram of a mixed injection plug according to another embodiment.

  As shown in FIG. 1, the mixed injection plug according to the embodiment of the present invention is plugged so that blood does not leak from the indwelling needle N placed on the patient's arm A when the infusion is interrupted for a long time. , Connected to the indwelling needle N. The plug for mixed injection includes a cylindrical plug body 1 and a plug body 2 made of an elastic material that seals the opening on the tail end side of the plug body 1. When the infusion is interrupted for a long time, a blood coagulation inhibitor such as heparin or physiological saline is filled in the plug main body 1 and connected to the indwelling needle N in order to prevent blood from solidifying and forming a thrombus. When instillation is resumed, an infusion needle (not shown) for instillation is punctured into the plug body 2.

  As shown in FIG. 2, the plug body 1 includes a small-diameter male luer portion 3 provided on the distal end side and a large-diameter portion 4 as a peripheral wall portion of the opening provided on the tail end side. The part 3 is fitted to the needle base of the indwelling needle N. Eight ribs 5 project from the outer peripheral surface of the large-diameter portion 4 at equal intervals in the circumferential direction. The large-diameter portion 4 is formed with a radial through-hole 7 that opens at the bottom of the groove 6 between the ribs 5.

  The plug 2 is formed by injecting an elastic material such as rubber into the large diameter portion 4. For this reason, it is not necessary to insert the plug body 2 into the plug body 1 and assemble it as in the conventional mixed plug. In the conventional product, the plug body is molded and then inserted into the plug body. However, according to the mixed injection plug of the embodiment, the plug body 2 can be molded and attached to the plug body 1 at the same time. Therefore, compared to the conventional product, the mixed injection plug of the embodiment is very easy to manufacture.

  Further, the elastic material is injected so as to enter the through hole 7 and further to the groove 6 through the through hole 7. Therefore, the plug body 2 formed of an elastic material is engaged with the through-hole 7, and the portion of the elastic material that protrudes into the groove portion 6 becomes an anchor portion 21 that exhibits a retaining function (anchor function). 1 and the plug 2 are firmly engaged. Therefore, the plug body 2 can be prevented from falling off from the plug body 1 even if the cap is not provided as in the conventional product. In addition, since no cap is required, the number of parts can be reduced, the cost can be reduced, and the size of the co-injection plug can be reduced.

  Further, since the outer peripheral surface of the large-diameter portion 4 can be firmly grasped by the rib 5, the force of the grasped finger can be directly transmitted to the plug body 1, and the anchor in the groove portion 6 can be applied even if a strong force is applied. Since the portion 21 does not receive force, the anchor portion 21 can be prevented from being broken, and the operability of connection to the indwelling needle N can be kept good.

  On the inner peripheral surface of the large-diameter portion 4, a step portion 8 is formed which is positioned ahead of the place where the through hole 7 is formed and gradually decreases in diameter from the large-diameter portion 4 to the male luer portion 3. A flange portion 9 is formed at the tail end of the large diameter portion 4 so as to project radially inward, and the tail end surface of the plug 2 is formed to be flush with the inner surface of the flange portion 9. The distal end portion of the plug body 2 is engaged with the step portion 8, and the outer peripheral edge portion of the tail end surface of the plug body 2 is engaged with the flange portion 9. Therefore, it is possible to prevent the plug body 2 from moving in the axial direction of the plug body 1 when the injection needle for infusion is punctured into the plug body 2 and when the injection needle is pulled out from the plug body 2. Further, since the tail end surface of the plug body 2 is flush with the inner surface of the flange portion 9, the co-injection plug is used to fill the co-injection plug with a blood coagulation inhibitor such as heparin or physiological saline. The tail end surface of the plug 2 does not contact the work table even when placed on a work table (not shown). Therefore, the tail end surface of the plug body 2 can be kept clean, and the trouble of washing the tail end surface of the plug body 2 before piercing the plug body 2 with the injection needle can be saved.

  Next, an example of a method for forming the plug 2 by injecting an elastic material into the plug body 1 will be described. When injecting the elastic material, as shown in FIG. 3, first, the core 100 is inserted from the distal end side of the plug main body 1 to the step portion 8 so that the elastic material does not enter beyond the step portion 8. . And the injection | pouring nozzle 101 is arrange | positioned from the tail end side of the plug main body 1 so that the front-end | tip may be located in the inner surface of the flange part 9, and an elastic material is inject | poured. The elastic material is injected into the large diameter portion 4 so as to pass through the through hole 7 and enter the groove portion 6. When the injection of the elastic material is stopped and the elastic material is solidified, the plug body 2 and the anchor portion 21 are formed.

  In this embodiment, eight ribs 5 project from the outer peripheral surface of the large-diameter portion 4, and the through-holes 7 are formed in all the bottom portions of the eight groove portions 6 between the ribs 5 in the large-diameter portion 4. However, the present invention is not limited to this, and the number of ribs may be 8 or less, or 8 or more, and the through holes may not be formed at the bottom of all the grooves.

  As mentioned above, although embodiment which applied this invention to the plug for co-injection connected to an indwelling needle was described, this invention is applicable similarly to the plug for co-infusion as shown in FIG. 4 connected to an infusion line. In this mixed injection plug, a tube portion 102 is provided at the tip end portion of the plug body 1 so as to communicate in a T-shape orthogonal to the axial direction, a male luer portion 103 is formed at one opening end portion, and the other opening portion is opened. A female luer portion 104 is formed at the end. Then, an infusion tube 105 is connected to each of the luer parts 103 and 104 to constitute an infusion line, an injection needle (not shown) is punctured into the plug body 2 at the tail end of the plug body 1, and a chemical solution is supplied to the fluid flowing through the infusion line. Mixed. The structure on the tail end side of the plug main body 1 and the structure of the plug body 2 are the same as those in the above embodiment, and the same reference numerals as those described above are attached to the same portions as those in the above embodiment.

Explanatory drawing which shows the use condition of the plug for mixed injection of embodiment of this invention. Sectional drawing of the plug for mixed injection of embodiment. Explanatory drawing which shows the manufacturing method of the plug for mixed injection of embodiment. Explanatory drawing of the plug for mixed injection of other embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Plug main body, 2 ... Plug body, 4 ... Large diameter part (periphery wall part of the opening part of a tail end side), 5 ... Rib, 6 ... Groove part, 7 ... Through-hole, 8 ... Step part, 9 ... Flange part.

Claims (3)

In a mixed injection plug comprising a tubular plug body and a plug made of an elastic material that seals the opening on the tail end side of the plug body,
A plurality of ribs project from the outer peripheral surface of the peripheral wall portion of the opening with a circumferential interval, and a plurality of radial through holes are formed so as to open at the bottom of the groove between the plurality of ribs, mixed injection, characterized in that said plug member said resilient material such Nde write enters in the through-hole projecting on the outer peripheral surface of the peripheral wall portion of the plug body in said groove is injected into the opening is formed Plug. A diameter-reduced step portion is formed on the inner peripheral surface of the peripheral wall portion of the opening portion ahead of the formation position of the through hole, and the distal end portion of the plug is engaged with the step portion. The plug for mixed injection according to claim 1, wherein: A flange portion projecting radially inward is formed at the tail end of the peripheral wall portion of the opening, and the plug body is formed so that the tail end surface of the plug body is flush with the inner surface of the flange portion, The mixed injection plug according to claim 1 or 2 , wherein an outer peripheral edge portion of a tail end surface of the plug body is engaged with the flange.

Images