JP6286522B1 - Connector for liquid injection - Google Patents

Abstract

Provided is a liquid co-injection connector that uses a general-purpose connector and can maintain a good hygiene state of infusion. A liquid mixed injection connector to which a connector is detachably connected, the branch having a first port to which a medical pipe is connected, a second port, and a third port to which the connector is connected The third port includes an inner pipe that forms a first flow path that communicates with the first port, and an outer pipe that forms a second flow path that communicates with the second port between the inner pipe and the third port. The opening end of the inner pipe is formed to protrude outward from the opening end of the outer pipe, and when the connection tool is connected to the third port, the opening end of the inner pipe is in the inner space portion. It arrange | positions in the position which faces the valve body of a connection tool, and a 1st flow path and a 2nd flow path are communicable via an inner side space part. [Selection] Figure 3

Description

  The present invention is arranged in the middle of a medical pipe for infusion of a main drug solution such as a drug solution or blood to a patient, and is used for co-injecting a side injection solution such as another drug solution into the main drug solution. Concerning connection connector.

  When a main drug solution such as a drug solution or blood is administered to a patient, a medical pipe such as an infusion tube that connects the solution back to the patient and distributes the main drug solution is used. In addition, in order to be able to mix side injection liquids such as other chemical liquids in the main chemical liquid, a liquid mixed injection connection connector may be used in the middle of medical piping.

  For example, the co-infusion means (connecting connector for liquid co-infusion) of Patent Document 1 has a chemical liquid channel (main channel) for circulating a chemical solution and a branch channel that branches from the middle of the chemical channel, and the branched channel. The replenishment liquid (side injection liquid) can be mixedly injected into the chemical liquid flow path via the. The branch passage is provided with a valve means (valve element), and the valve means closes the branch passage in the non-operating state and opens the branch passage in the mixed injection operation. Yes. And when performing mixed injection operation, a supply means is connected to a valve means, and a side injection liquid is mixed with a main drug solution via a valve means and a branch flow path.

  Moreover, the connector (connecting connector for liquid mixture injection) of Patent Document 2 includes first to third three ports having flow paths through which an infusion agent (infusion solution) can flow in or out, a first port, and a second port. An internal flow path (main flow path) communicating between the flow paths and a space provided in the third port and connected to the internal flow path are provided in the main body, and another space is connected to the space via the third port. An infusion solution (side injection) can be supplied. Further, the third port is provided with a valve body into which a male connector can be inserted, and the third port can be closed when the male connector is not inserted, while the third port can be opened by inserting the male connector. The other infusion agent can be mixed and injected into the infusion agent flowing through the internal flow path via the third port. Furthermore, the connector can guide the infusion agent flowing into the internal flow path from the first port to the space portion on the internal flow path, and the flow path cross-sectional area closer to the space portion from the flow path cross-sectional area of the first port. This wall surface guides the first infusate flowing from the first port to the space portion side and guides the space portion near the space portion by reducing the cross-sectional area of the flow path. It is configured to increase the momentum of the first infusion solution to be discharged and to discharge the staying infusion solution.

  Further, the liquid co-infusion device (connecting connector for liquid co-infusion) of Patent Document 3 has a co-infusion port to which a rubber-like elastic body (valve body) is attached at one end of a tubular body housing, and an outlet at the other end. The cylinder has an injection port at the tip of the branch pipe branched at the middle part between the mixed injection port and the outlet, and is erected from the vicinity of the branch pipe to the vicinity of the mixed injection port in the lumen of the housing A hollow body is provided. In addition, a connector with a blunt needle can be connected to the mixed injection port side of the housing. By connecting the connector shallowly, the tip of the blunt needle is inserted into the housing via a rubber-like elastic body. And a gap can be formed between the tip of the blunt needle and the tip of the cylindrical hollow body. Then, the side liquid injection is sent into the housing through the blunt needle. Note that Patent Document 3 describes that the gap between the tip of the blunt needle and the tip of the cylindrical hollow body is sized so that no dead space occurs. Does not stay, and the mixed injection solution is sent to the lumen of the cylindrical hollow body and continuously administered from the outlet to the patient's body. In addition, this Patent Document 3 describes that during the infusion, the inside and outside are blocked by a rubber-like elastic body provided in the co-injection port of the housing, so that invasion of bacteria into the infusion is prevented. ing.

JP 2009-45165 A JP 2016-147077 A JP-A-11-33124 Japanese Patent Laid-Open No. 2015-66205 JP 2016-150063 A

  As described in Patent Documents 1 to 3, in the liquid mixture injection connector, a main channel (chemical solution channel, internal channel) through which the main drug solution flows is provided in the mixed injection port (third port, branch channel). The valve means is configured to be cut off from the outside, and bacteria are prevented from entering the infusion according to the performance of the valve body. In addition, regarding the problem that a dead space is likely to be generated between the valve body and the main flow path, the infusion of the infusion is prevented by devising the path of the flow path formed between the valve body and the main flow path. Prevents bacteria from entering. Thus, in the liquid mixed injection connector, the effect of preventing the invasion of bacteria into the infusion depends on the performance of the valve body, and the valve body is the most important component. For this reason, each manufacturer makes daily improvements to improve the function of the valve body. For example, as disclosed in Patent Document 4 or Patent Document 5, a standard lure chip defined in ISO 594 is provided. A medical connector (connector) is also used in which a valve body is provided in a connector having a portion (male luer) and can be connected to a medical instrument without using a dedicated connector.

  On the other hand, the liquid mixed injection connector having the function of preventing infusion retention is manufactured by a plurality of manufacturers, but the liquid mixed injection connector manufactured by each manufacturer needs to be combined with a dedicated valve body. It has become a thing. That is, the valve body is not versatile or compatible with each manufacturer, and when the connector and the valve body of different manufacturers are used in combination, the infusion retention prevention effect cannot be exhibited. For this reason, even if a high performance valve element was developed by another manufacturer, it was not possible to replace and use only the valve element without changing the connector. Therefore, the user has been forced to use the connector and the valve body as a unit.

  The present invention has been made in view of such circumstances, and provides a connector for mixed liquid injection that can be applied with a connector having various valve bodies and can maintain a good hygiene state of infusion. For the purpose.

  According to the present invention, it is possible to attach and detach a connecting tool including a valve body into which a medical instrument for supplying a side injection solution can be inserted and removed, and a base portion that forms an inner space portion that is blocked from the outside by the valve body. A liquid mixed injection connector to be connected, comprising: a branch pipe body having a first port and a second port to which a medical pipe is connected; and a third port to which the connector is connected; The port forms an inner pipe that forms a first flow path that communicates with the first port, and a second flow path that is formed around the inner pipe and communicates with the second port. A double structure having an outer pipe, the opening end of the inner pipe is formed to protrude outward from the opening end of the outer pipe, and when the connection tool is connected to the third port, the inner pipe The open end of the pipe faces the valve body in the inner space portion It arranged that position, the first flow path and the second flow path is allowed to communicate with each other through the inner space.

A connection tool having a standard cylindrical portion (a luer tip or a male luer) defined by ISO594 is connected to the third port of the connector for liquid mixture injection. Further, when the connection tool is connected to the third port, the opening end of the inner pipe is formed to protrude outward from the opening end of the outer pipe, and the opening end of the inner pipe is valved in the inner space portion of the connection tool. Since it is arranged facing the body, the first flow path and the inner space portion of the connector can be communicated, and further, the first flow path and the second flow path are communicated via the inner space portion. Can do.
And in the state where the connection tool is connected to the third port in this way, the main chemical liquid sprayed into the inner space portion of the connection tool through the open end (first flow path) of the inner pipe is the peripheral wall of the inner space portion. It swirls like a part, flows into the second flow path of the outer pipe as it is, and is sent to the patient from the second port through the second flow path. Further, when the side injection is injected into the inner space through the valve body of the connector, the side stored in the inner space by the main chemical liquid ejected from the open end (first flow path) of the inner pipe. The injected liquid can be efficiently washed away in the second flow path of the outer pipe. Therefore, the main drug solution and the side injection can be prevented from staying in the inner space of the connector, and the hygienic state of the infusion can be maintained well.

  In the liquid co-injection connector according to the present invention, it is preferable that a male screw portion that can be screwed with a female screw portion of the connector is formed on the outer peripheral surface of the outer pipe.

  A luer lock type connector can be connected to the third port by forming a male thread portion on the outer peripheral surface of the outer pipe. In this case, the connection between the liquid co-injection connector and the connector can be reinforced, so that the connector can be prevented from falling off from the liquid co-injector connector, and the hygienic state of the infusion can be kept good.

  According to this invention, the connection tool which has a various valve body can be applied, and the sanitary state of infusion can be kept favorable.

1 is an external perspective view of a liquid mixed injection connector according to a first embodiment of the present invention. It is A arrow directional view in FIG. FIG. 3 is a cross-sectional view of the liquid mixture injection connector along line BB in FIG. 2. It is sectional drawing of the state which connected the connection tool to the connector for liquid mixture injection. It is sectional drawing of the state which connected the connector to the connector for liquid mixture injection of 2nd Embodiment of this invention.

  Hereinafter, a liquid mixture injection connector according to an embodiment of the present invention will be described with reference to the drawings.

  As shown in FIGS. 3 and 4, the connector for mixed liquid injection 101 according to the first embodiment shown in FIGS. 1 to 4 has a connector 201 that can insert and remove a medical instrument for supplying side injection. It is a connector for mixed liquid injection that can be connected. The liquid mixed injection connector 101 includes a first port 10 and a second port 20 to which a medical pipe (not shown) such as an infusion tube is connected, and a third port 30A to which a connector 201 is connected. A branch pipe body 1 having two ports 10, 20, and 30A is provided.

The connector 201 that can be connected to the third port 30A will be briefly described.
As shown in FIGS. 3 and 4, the connection tool 201 connected to the third port 30 </ b> A is cut off from the outside by the valve body 51 to which a medical instrument such as a syringe and a catheter can be attached and detached. A so-called split septum-type connector comprising: a base portion 52 that forms the inner space portion 54A; and a cylindrical portion 53A that is connected to the base portion 52 and has an inner flow passage 55A that communicates with the inner space portion 54A. Is done. The tubular portion 53A of the connection tool 201 has a standard shape defined by ISO594. Specifically, the outer peripheral surface 53o of the cylindrical portion 53A is formed by a luer taper defined by ISO 594, and the connector 201 is a medical pipe or the like (not shown) having a female connector standardized by the same rule. ) Can be connected. 3 and 4 has an outer cylindrical portion 56 in which a female screw portion 57 is formed around the cylindrical portion 53A, and is connected to a medical pipe or the like as a connection destination and a luer lock. System connection is possible.

  Further, the valve body 51 of the connector 201 is formed of an elastic member, and the male connector 61 (a luer chip, lure chip) of the medical instrument 301 is connected to the inner space portion 54A via a slit 51s formed in the center of the valve body 51. Can be inserted and removed. Therefore, when the male connector 61 of the medical instrument 301 is not inserted into the valve body 51, the slit 51s of the valve body 51 is closed, and the inner space 54A is blocked from the outside (or the male connector 61). It becomes a state.

  On the other hand, by inserting the distal end portion of the male connector 61 of the medical instrument 301 into the valve body 51, the slit 51s can be opened, and the inside of the medical instrument 301 and the inner space portion 54A of the connector 201 can be communicated. it can. Then, by making the inner space portion 54 </ b> A communicate with the inside of the medical device 301 in this way, the side liquid injection inside the medical device 301 is injected into the inner space portion 54 </ b> A of the connector 201 through the distal end opening of the male connector 61. it can. Further, the side injection injected into the inner space portion 54A is sent out through the inner flow path 55A to a medical pipe or the like to which the cylindrical portion 53A is connected. When the male connector 61 of the medical instrument 301 is pulled out from the valve body 51 after the injection of the side injection is completed, the slit 51s is closed again by the elastic restoring force of the valve body 51, and the inner space portion 54A of the connector 201 is removed. Can be closed.

Next, each component of the liquid mixed injection connector 101 will be described.
The branch pipe main body 1 constituting the entire liquid mixed injection connector 101 is formed of a resin such as polycarbonate, transparent ABS resin, or polypropylene.
The first port 10 is a female connector having an inner peripheral surface 11i formed by a Luer taper defined by ISO 594, and can be connected to a medical pipe having a male connector defined by the same specification by fitting. . Moreover, the external thread 11 is formed in the outer peripheral surface 11o of the 1st port 10, and this external thread 13 is provided so that it can be screwed together with the internal thread which the medical piping etc. of a connection destination have. For this reason, the first port 10 can be connected in a luer lock system to a medical pipe or the like to be connected. Note that the first port 10 may employ a slip lock method in which the male screw portion 13 is not formed, and the first port 10 is connected only by fitting the male connector and the female connector.

  The second port 20 is a male connector having an outer peripheral surface 21o formed by a Luer taper defined by ISO 594, and can be connected to a medical pipe having a female connector defined by the same specification by fitting. Further, the second port 20 is provided with a lock member 22 having a female screw portion 23 formed therein. The female screw portion 23 is provided so as to be screwable with a male screw portion of a medical pipe or the like to be connected. Yes. For this reason, the second port 20 can be connected in a luer lock system to a medical pipe or the like to be connected. Note that the second port 20 can also employ a slip lock system in which the lock member 22 (female screw portion 23) is not provided, and the connection is made only by fitting the male connector and the female connector.

  The third port 30A is formed around the inner pipe 31A that forms the first flow path 41 that communicates with the first port 10 and the inner pipe 31A, and communicates with the second port 20 between the inner pipe 31A. A double structure having the outer pipe 32 forming the second flow path 42 is formed. The inner peripheral surface 32i on the open end 32e side of the outer pipe 32 is formed by a Luer taper defined by ISO 594, and can be connected to a medical pipe or the like having a male connector defined by the provision by fitting. Is done. That is, the inner peripheral surface 32 i of the outer pipe 32 can be connected to the outer peripheral surface 53 o of the cylindrical portion 53 A of the connection tool 201 by fitting. In addition, a male screw portion 33 that can be screwed with the female screw portion 57 of the connection tool 201 is formed on the outer peripheral surface 32o of the outer pipe 32, so that the connection tool 201 can be connected to the luer lock system. In the third port 30A as well, a slip lock method can be adopted in which the male connector (connector) and the female connector (outer pipe 32) are connected only without forming the male screw portion 33. .

  On the other hand, the inner pipe 31A is formed so as to be inserted into the inner flow path 55A with a gap between the inner pipe 53A and the inner peripheral surface 53i of the tubular portion 53A of the connector 201. That is, the outer peripheral surface 31o of the inner pipe 31A is smaller than the inner peripheral surface 53i of the cylindrical part 53A, in other words, the outer diameter of the inner pipe 31A is smaller than the inner diameter of the cylindrical part 53A. Further, the opening end 31e of the inner pipe 31A is formed to protrude outward from the opening end 32e of the outer pipe 32, and when the connection tool 201 is connected to the third port 30A, the inner space of the connection tool 201 is formed. The portion 54A can be disposed at a position facing the valve body 51.

  For this reason, the fitting 201 can be connected to the third port 30A by fitting the outer peripheral surface 53o of the tubular portion 53A of the connecting tool 201 to the inner peripheral surface 32i of the outer pipe 32. The inner pipe 31A can be inserted into the inner flow path 55A of the cylindrical part 53A in a state where a gap is formed between the inner peripheral surface 53i of the cylindrical part 53A and the outer peripheral surface 31o of the inner pipe 31A. The second flow path 42 of the tube body 1 and the inner flow path 55A of the cylindrical portion 53A can be communicated with each other. Further, the opening end 31e of the inner pipe 31A is formed to protrude outward from the opening end 32e of the outer pipe 32, and the opening end 31e of the inner pipe 31A is formed in the valve body 51 in the inner space portion 54A of the connector 201. The first flow path 41 and the inner space portion 54A of the connection tool 201 can be communicated with each other. Therefore, the first flow path 41 and the second flow path 42 of the branch pipe main body 1 are communicated with each other via the inner space portion 54A of the connection tool 201 by connecting the connection tool 201 to the third port 30A. It has become.

  Then, in the state where the connector 201 is connected to the third port 30A in this way, the open end 31e (first flow) of the inner pipe 31A is shown in FIG. 4 as indicated by a two-dot chain line arrow. The main drug solution is supplied into the inner space 54A of the connector 201 through the path 41). And the main chemical | medical solution injected from the opening end 31e of the inner side piping 31A swirls so that the surrounding wall part of inner side space part 54A may be traced so that the flow in a flow path may be shown by the solid line arrow in FIG. Then, it flows into the inner flow path 55A of the cylindrical portion 53A as it is, and is sent out from the second port 20 to the medical pipe or the like through the second flow path 42 of the outer pipe 32.

  Further, when the side injection is injected into the inner space 54A through the valve body 51 of the connector 201, the side injection stored in the inner space 54A is ejected from the opening end 31e of the inner pipe 31A. The main chemical solution can be efficiently washed out into the inner flow path 55A of the cylindrical portion 53A. Thus, in the liquid mixed injection connector 101, the inner space portion 54A of the connector 201 into which the side injection liquid is injected is configured as a part of the flow path of the main drug solution, and the main drug solution is always in the inner space portion. Since it is configured to pass through the interior of 54A, it is possible to prevent the main drug solution and the side injection from staying in the inner space portion 54A of the connector 201. Therefore, the hygiene state of the infusion delivered to the patient from the liquid mixed injection connector 101 can be maintained well.

  Further, in the liquid mixed injection connector 101, the male thread portion 33 is formed on the outer peripheral surface 32o of the outer pipe 32 of the third port 30A, so that the luer lock type connector 201 can be connected to the third port 30A. . In this case, the connection between the liquid mixed injection connector 101 and the connector 201 can be reinforced by using the luer lock type connector 201, so that the connector 201 can be prevented from falling off and the infusion hygiene condition is improved. Can keep.

  In the first embodiment, as an example, the case where the connector 201 having the form shown in FIGS. 3 and 4 is connected to the liquid mixed injection connector 101 has been described, but the liquid mixed injection connection according to the present invention is described. The connection tool connected to the connector is not limited to the one applied in the first embodiment. For example, a connector having a standard cylindrical portion (luer tip, male luer) defined by ISO 594, such as the connector 202 shown in FIG. 5, can be applied.

  For example, the liquid mixed injection connector 102 of the second embodiment shown in FIG. 5 is the same as the liquid mixed injection connector 101 of the first embodiment, on the inner side of the open end side of the outer pipe 32 constituting the third port 30B. The peripheral surface 32i is formed by a Luer taper defined by ISO594, and a connector having a cylindrical portion defined by the same specification can be connected. The connecting tool 202 shown in FIG. 5 has a cylindrical portion 53B that is longer in the axial direction than the connecting tool 201 used in the first embodiment, but the outer peripheral surface 53o of the cylindrical portion 53B is Since it has a Luer taper defined by ISO 594, the connection connector 102 for liquid mixture injection and the connection tool 202 are fitted to the inner peripheral surface 32i of the outer pipe 32 and the outer peripheral surface 53o of the cylindrical portion 53B. Can be connected.

In this case, the inner pipe 31B is formed so as to be inserted into the inner flow path 55B with a gap between the inner pipe 53B and the inner peripheral surface 53i of the tubular portion 53B of the connector 202, and the open end 31e of the inner pipe 31B. Is formed so as to protrude outward from the opening end 32 e of the outer pipe 32. When the connection tool 202 is connected to the third port 30B, the open end 31e of the inner pipe 31B can be disposed at a position facing the valve body 51 in the inner space portion 54B of the connection tool 202.
In addition, in the liquid mixture injection connector 102 of the second embodiment, the other configurations except for the inner pipe 31B are the same as those of the liquid mixture injection connection connector 101 of the first embodiment, and in FIG. The same reference numerals are assigned to elements common to and the description is omitted.

  Also in the liquid co-injection connector 102 of the second embodiment, the opening end 31e of the inner pipe 31B is arranged in the inner space portion 54B of the connector 202, and the inner space portion 54B of the connector 202 into which the side injection liquid is injected. It is configured as a part of the flow path of the main chemical solution, and is configured so that the main drug solution always passes through the inside of the inner space portion 54B. For this reason, the side injection liquid stored in the inner space part 54B can be efficiently washed out to the inner channel 55B of the cylindrical part 53B by the flow of the main chemical liquid ejected from the opening end 31e of the inner pipe 31B. . Therefore, the main drug solution and the side injection solution can be prevented from staying in the inner space portion 54B of the connector 202, and the sanitary state of the infusion delivered to the patient from the liquid mixed injection connector 102 can be maintained well.

  Further, in the liquid mixed injection connector 102, the male thread portion 33 is formed on the outer peripheral surface 32o of the outer pipe 32 of the third port 30A. Therefore, the luer lock type connector 202 can be connected to the third port 30A. . In this case, the connection between the liquid co-injection connector 102 and the connector 202 can be reinforced by using the luer lock type connector 201, so that the connector 202 can be prevented from falling off, and the hygiene state of the infusion can be improved. Can keep.

  In addition, this invention is not limited to the said embodiment. Various modifications can be made without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 1 Branch pipe main body 1st port 20 2nd port 30A, 30B 3rd port 31A, 31B Inner piping 32 Outer piping 33 Male thread part 41 First flow path 42 Second flow path 51 Valve body 52 Base part 53A, 53B Cylindrical shape Portions 54A and 54B Inner space portions 55A and 55B Inner flow passage 57 Female threaded portions 101 and 102 Liquid mixed injection connector 201 and 202 Connector 301 Medical instrument

Claims (2)

A liquid in which a connector comprising a valve body into which a medical instrument for supplying a side injection solution can be inserted and removed, and a base body part that forms an inner space part cut off from the outside by the valve body is detachably connected A connector for mixed injection,
A branch pipe body having a first port and a second port to which a medical pipe is connected, and a third port to which the connector is connected;
The third port includes an inner pipe that forms a first flow path that communicates with the first port, and a second flow path that is formed around the inner pipe and communicates with the second port. A double structure having an outer piping to form a
The opening end of the inner pipe is formed to protrude outward from the opening end of the outer pipe,
When connecting the connector to the third port,
The opening end of the inner pipe is arranged at a position facing the valve body in the inner space portion,
The liquid co-injection connection connector, wherein the first flow path and the second flow path can communicate with each other via the inner space portion.   2. The liquid co-injection connector according to claim 1, wherein a male screw portion that can be screwed with a female screw portion of the connector is formed on an outer peripheral surface of the outer pipe.

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