JP4872269B2 - Closed tubular fitting - Google Patents

Description

  The present invention relates to a closed tubular joint having a plurality of co-injection ports.

  During therapy, it is often the case that multiple drugs are administered urgently or blood is collected urgently. Conventional infusion / transfusion circuits generally have at least one “mixed injection port” in preparation for such mixed injection operation. In such an emergency mixed injection operation, a plurality of drugs may be administered simultaneously. In preparation for such an emergency mixed injection operation, a plurality of mixed injection ports may be arranged in advance in an infusion circuit, a blood transfusion circuit, or the like. However, if multiple infusion ports are provided in an infusion solution, infusion circuit, etc., naturally the number of parts increases, and the number of infusion ports desired by the infusion solution, transfusion therapy, or emergency co-infusion operation to be adopted. Therefore, it is difficult to unify standards for infusion solutions, blood transfusion circuits, etc., which have been an obstacle to cost reduction.

In addition, the infusion and transfusion circuit systems are desired to be “closed systems” that do not come into contact with the outside air for hygiene purposes. When performing the emergency mixed injection operation as described above, it is necessary to perform the mixed injection operation in a state in which the closing is maintained. However, depending on the mixed injection operation, there may be a shortage of the desired mixed injection port in the previously used circuit. In this case, open the circuit and connect another new circuit. There was a situation where the operation had to be performed. In addition, assuming such a case, even if a circuit having a large number of mixed injection ports is used, a plurality of mixed injection parts may not be used, and the operation of the entire circuit may be complicated. It was.
Japanese Patent No. 3389983

  The present invention can easily add a desired number of mixed injection ports to a circuit in use while maintaining a closed system (closed system) even when a desired mixed injection port is insufficient in a circuit used in advance. It is an object of the present invention to provide a closed tubular joint that can be expanded.

  The present invention has solved the above problems by providing a closed tubular joint having a male luer and at least two co-injection ports. Therefore, the mixed injection port employed in the present invention refers to a mixed injection port that can maintain a closed system.

  As the mixed injection port constituting the closed tubular joint of the present invention, the slit part and / or the hole part are connected to a needleless port such as a luer type or luer lock type, hemodialysis circuit, infusion circuit, blood collection circuit. If the medical circuit such as the above or the closed tubular joint of the present invention itself is a mixed injection port that can be held and connected while maintaining the sealing system by the male connector part which is the connection part thereof, it can be used without particular limitation. it can. As such a mixed injection port, specifically, as shown in FIG. 4 previously filed by the present applicant, a disc-like shape in which a slit and / or a hole 6 in which an insert can be inserted and held in the center is formed. The elastic valve 9, the pedestal 5 that supports the lower peripheral portion while leaving the central portion of the back side surface of the valve 9, and the valve that covers at least the upper peripheral portion of the valve 9 while leaving the central portion of the front side surface of the valve 9. The thing (patent 3338983) comprised with the cover 4 and the flow path 3 is mentioned.

Hereinafter, embodiments of the closed tubular joint of the present invention will be described in more detail with reference to the drawings.
Embodiment 1
This will be described with reference to FIGS.
The closed tubular joint of FIG. 1 includes a luer lock male luer 8 and a mixed injection port 1 connected horizontally to the flow path 3 at both ends of the flow path 3, and between the luer lock male luer 8 and the mixed injection port 1. It is composed of two mixed injection ports 2 connected in the vertical direction to the flow path 3 connected by the mixed injection port connector 10. Between the mixed injection ports 1 and 2, between the mixed injection ports 2, and between the mixed injection port 2 and the luer 8, even if the mixed flow ports and the lures 8 are directly connected to each other to form the flow channel 3. Alternatively, the flow path 3 may be formed by connecting the mixed injection ports and the flow paths constituting the lure with a connecting member such as a tube. Furthermore, the flow path 3 may be connected to the mixed injection port 1, the mixed injection port 2 or the luer lock type male luer 8 to which the flow path 3 is connected in an inseparable manner or in a separable manner. For example, in the closed tubular joint of FIG. 2, the mixed injection port 1 connected to one end of the flow path 3 in the closed tubular joint of FIG. It is also possible to connect a mixed injection port having another configuration, for example, a configuration having a plurality of mixed injection ports.

The closed tubular joint shown in FIGS. 1 and 2 includes a mixed injection port 1 capable of connecting a male connector to be connected as a mixed injection port in the horizontal direction with respect to the flow path 3, a luer lock type male luer 8, and the mixed injection port 1. The two male injection ports 2 that can connect the male connector to be connected installed in the vertical direction with respect to the flow path 3, and the mixed injection port 2 is connected to the flow path 3. Although installed in the same direction, the number of mixed injection ports installed between the luer lock male luer 8 and the mixed injection port 1 is not limited to two, and may be two or more. The installation angle of the mixed injection port 2 with respect to the flow path 3 is not limited to the vertical direction with respect to the flow path 3, and can be selected at an angle other than the horizontal direction with respect to the flow path 3. A combination of the direction (the former) and the other than the horizontal and vertical directions (the latter) may be used.
Further, as the latter, for example, a plurality of co-injection ports 2 having a branched shape, for example, a shape like a bifurcated socket can be mentioned.

Embodiment 2
The closed tubular joint of FIG. 3 includes a luer lock male luer 8 at both ends of the flow path 3 and a mixed injection port 1 capable of connecting a male connector of a connecting member in the horizontal direction with respect to the flow path 3, and the luer lock male luer. 8 and the mixed injection port 1 are configured to have a mixed injection port 2 to which a male connector of a connecting member can be connected in a vertical direction with respect to one flow path 3. The basic minimum structural unit of the closed tubular joint of the present invention.
Moreover, the thing of this embodiment can also be set as the structure which can be isolate | separated in the flow-path 3 part between the said co-injection port 1 and the co-injection port 2 similarly to the closed type tubular joint shown in FIG. The same effect as the thing is produced.

Embodiment 3
In the therapy using an infusion set, a drug may be transferred using a pump such as an infusion pump or a syringe pump. At this time, there is a risk that an unexpected cause may lead to a serious medical accident. For example, in the case of an infusion pump, there is a so-called “free flow phenomenon” in which when a circuit is removed from an infusion pump without clogging the line with a clamp or the like, a medicinal solution is rapidly injected due to a drop with the patient. May occur. Further, in the case of a syringe pump, if the syringe pusher is not set in the syringe pump, a so-called “syphoning phenomenon” in which a chemical solution is rapidly injected due to a drop between the patient and the syringe pump may occur. In particular, in the case of infusion therapy originally intended for microinjection, such as a “syringe pump”, if the above phenomenon occurs, it may lead to a serious accident.

  Therefore, in order to prevent the “free flow phenomenon” and the “syphoning phenomenon” based on the unforeseen factors as described above, the closed-type tubular joint of this embodiment includes the male luer and at least two mixed injection ports. The one-valve (check valve) is configured so that the valve does not open unless a pressure higher than a specific pressure occurs in the direction of the mixed injection port from the male luer side between the mixed injection port closest to the male luer and the male luer. Things are effective. An example of the closed tubular joint having such a configuration is that shown in FIG.

The closed tubular joint shown in FIG. 6 has a male luer 7 connected to a line of a medical treatment system, for example, a female connector of an infusion line, and the drug mixedly injected from the mixed injection port 2 passes through the one-way valve (check valve) 12. And then transferred to the infusion line. The one-way valve (check valve) 12 opens at a drug transfer pressure by a pump device such as an infusion pump or a syringe pump, but even if a drop pressure occurs due to an unexpected accident as described above, The pressure does not open the valve. As a result, it is possible to achieve an effect of preventing the over-administration of the drug due to the drop pressure between the apparatus and the patient, so-called “free flow phenomenon” or “siphoning phenomenon”.
Further, the one-way valve (check valve) 12 does not open unless a pressure higher than a specific pressure is generated in the direction of the mixed injection port from the male luer side. Therefore, the fluid flowing in the apparatus is always “from the mixed injection port side to the male luer direction”. It has the characteristic of flowing into Therefore, even if an accident other than the above occurs and a negative pressure is generated as compared with the pressure on the infusion line side, there is no backflow from the infusion line side toward the closed tubular joint side. By these things, it becomes possible to perform infusion therapy with higher safety by incorporating the closed tubular joint of the present invention into a normal infusion device and using it.

  In addition, the closed tubular joint of the present invention includes various types that are configured by combining the number of mixed injection ports to be used and the attachment angle with respect to the flow path to which the ports are attached, and the mixed injection port. Since they have the same shape or at least similar shapes, it is preferable that a means for improving the visibility and the distinguishability of the mixed injection port is adopted for the cover of each mixed injection port used. For example, by giving different colors (for example, blue, green, yellow, red, etc.) to each mixed injection port to be used, the visibility of each mixed injection port is improved and an erroneous connection prevention effect is provided. Can be specified by the color tone, and can be used for specifying the type or application of the closed tubular joint based on the color tone combination.

  Since the closed tubular joint of the present invention can be prepared in various kinds with different numbers and directions of mixed injection ports 1 as described above, a desired mixed injection port for a medical circuit or the like used in advance can be prepared. Even in the case of shortage or without using a medical circuit having a large number of co-infusion ports in advance, the medical staff in the field maintains the closed system of the circuit as necessary (closed system). It is possible to easily add a desired number of mixed injection ports to the circuit used. That is, when the necessity of adding a co-injection port arises in the medical circuit being used, a preferred embodiment can be easily selected and prepared according to the content of the necessity. Furthermore, since medical device manufacturers do not need to use a large number of mixed injection ports as medical circuits, for example, blood collection circuits, the manufacturing cost of medical circuits can be reduced, and the standardization of manufacturing and circuits becomes easy.

It is a figure showing one embodiment of a closed type tubular joint of the present invention. In the closed tubular joint of FIG. 1, the mixed injection port 1 connected to one end of the flow path 3 and the flow path 3 are configured to be separable and connectable. It is a figure showing one embodiment of a closed type tubular joint of the present invention. It is sectional drawing of one embodiment of the mixed injection port which comprises the closed type tubular joint of this invention. It is sectional drawing which shows the state which inserted and hold | gripped the lure part in the mixed injection port of FIG. It is a sectional view of a closed type tubular joint which has a mixed injection port, a male luer part, and a check valve.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Mixed injection port 2 Mixed injection port 3 Flow path 4 Cover 5 Base 6 Slit part and / or hole part 7 Luer part 8 Male luer 9 Elastic stopper 10 Mixed injection port connector 12 One-way valve (check valve)

Claims (5)

It has at least two co-infusion ports and can connect the male connector to be connected to the flow path opening at the end opposite to the end of the flow path to which the male luer is connected in the horizontal direction with respect to the flow path. One of the mixed injection ports is mounted, and a mixed injection port capable of connecting a male connector to be connected to the flow path between the male luer and the mixed injection port at an angle perpendicular to the flow path is mounted. A disk-like elastic valve in which a slit and / or a hole is formed, in which a male connector to be connected is inserted and held at the center of the mixed injection port, a pedestal carrying the elastic valve, A closed-type tubular joint for adding a co-injection port, characterized by comprising a cover for holding an elastic valve and a flow path. The closed-type tubular joint according to claim 1, wherein the co-injection port attached to the opening of the flow path is separable from the flow path. Provide a one-way valve (check valve) in which the valve does not open unless a pressure higher than a specific pressure is generated from the male luer side in the direction of the mixed injection port between the male injection port closest to the male luer and the male luer. The closed tubular joint according to claim 1 or 2 , characterized in that The closed joint according to any one of claims 1 to 3 , wherein each co-injection port has means for improving its visibility and distinguishability. The closed tubular joint according to claim 4 , wherein the means for improving the visibility and the identification is a combination of different colors and / or combinations of the colors.

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