JP7261383B2 - connection connector - Google Patents

Description

TECHNICAL FIELD The present invention relates to a connector used for liquid flow paths in the medical field.

Conventionally, in liquid flow paths in the medical field, when a sub-flow path is connected to a main flow path, such as when administering a liquid such as a drug solution during or after administration of another liquid, a plurality of channels are used. A connection connector having a connection port is used. Specifically, for example, a three-way stopcock described in FIGS. 1 and 2 of Japanese Patent Application Laid-Open No. 2010-148757 (Patent Document 1) is known.

In general, a three-way stopcock has a switching valve that communicates and shuts off a sub liquid flow path formed by another connection port with respect to a main liquid flow path formed between two connection ports. there is Then, for example, when administering an anticancer agent, the premedication drug solution is administered through the main liquid flow path, and the anticancer agent is administered through the sub liquid flow path before, during, or after the premedication. is administered.

By the way, the anticancer drug is enclosed in a drug solution bag or the like, and by connecting a male connector provided at the tip of a tube extending from the drug solution bag to a female connector that constitutes a sub liquid flow path in the three-way cock , is connected to the main liquid flow path.

Here, when connecting the drug solution channel of the anticancer agent to the three-way stopcock, a priming operation is performed for the purpose of preventing contamination of residual air in the channel. The priming operation is carried out by, for example, attaching a priming cap equipped with an air vent filter to the male connector at the tip of a tube extending from the drug solution bag, and allowing the anticancer drug to flow out of the drug solution bag to exhaust the air from the priming cap. executed. Alternatively, a circulation line is formed by connecting the male connector at the tip of the tube to the co-injection tube provided on the tube, and the anticancer drug is circulated through the circulation line to discharge air into the medical bag. Proposed.

However, in any of these conventional priming methods, after priming is completed, it is necessary to remove the priming cap or disconnect the male connector from the circulation line, and then reconnect the male connector to the main liquid flow path. was there. Therefore, the priming operation is troublesome, and the anticancer drug may be exposed to the outside or leaked from the male connector removed after priming.

JP 2010-148757 A

The present invention has been made against the background of the above circumstances, and the problem to be solved is to provide a novel structure that facilitates priming operation and suppresses liquid exposure and leakage after priming. To provide a connector.

Hereinafter, aspects of the present invention that have been made to solve such problems will be described. It should be noted that the constituent elements employed in each aspect described below can be employed in any possible combination.

A first aspect of the present invention includes a plurality of connection ports to which an external flow path can be connected to form a liquid flow path, and a switch that communicates and disconnects at least one of the connection ports with respect to the other connection ports. , wherein the switching valve is a switching valve that can be repeatedly switched, and the connection port communicated and blocked by the switching valve is in a state of being blocked from the other connection port. An air passage is provided for connecting the internal liquid flow path to an external space, and a filter is provided for allowing passage of air in the air passage and blocking passage of liquid. It is a thing.

According to the connection connector constructed according to this aspect, by allowing the liquid to flow in from the liquid channel connected to the connection port, the mixed air is discharged to the external space through the filter, and priming is achieved. Therefore, in this aspect, there is no need to remove or reconnect the male connector after priming, which facilitates the priming operation and reduces exposure and leakage of liquid after priming.

A second aspect of the present invention is the connection connector according to the first aspect, wherein the third connection port is connected to the switching valve for the liquid flow path by the first and second connection ports communicating with each other. The co-injection part is configured by communicating and blocking by.

Since the connection connector constructed according to this aspect is applied to, for example, a three-way stopcock, it is possible to additionally administer liquid to the liquid channel through the mixed injection section.

A third aspect of the present invention is the connection connector according to the first or second aspect, wherein the connection port communicated and blocked by the switching valve is provided with an elastic valve for sealing an opening portion. A connecting portion is provided through which a hollow connecting needle is inserted from the outside through the elastic valve.

According to the connection connector constructed according to this aspect, the opening of the connection port is sealed by the elastic valve before the connection needle is inserted, thereby preventing foreign matter from entering the connection needle. Withdrawal also achieves resealing of the opening of the connection port by the elastic valve.

A fourth aspect of the present invention is the connection connector according to any one of the first to third aspects, wherein the connection port communicated and blocked by the switching valve is connected to another connection port. The air passage is provided at a position near the end.

According to the connection connector constructed according to this aspect, the air passage is provided at a position close to the connection side end to the other connection port, that is, at a position far from the opening or sealing portion of the connection port. It is possible to reduce the possibility of deterioration of air bubble release between the connector and the blockage of the air passage due to the liquid flowing in the connection port.

A fifth aspect of the present invention is the connector according to any one of the first to fourth aspects, wherein the air passage is detachably provided with a cap covering an opening to the outside. be.

According to the connection connector constructed according to this aspect, by attaching the cap to the opening of the air passage after priming, exposure and leakage of liquid through the air passage and re-entrainment of air into the connection port can be prevented. can be reliably prevented.

The mating connector constructed according to the present invention facilitates the priming operation, eliminates the need to remove and reconnect the male connector after priming, and reduces exposure and leakage of liquid after priming.

1 is a plan view showing a connector as one embodiment of the present invention; FIG. FIG. 2 is a bottom view of the connector shown in FIG. 1; FIG. 2 is a right side view of the connector shown in FIG. 1; IV-IV sectional view in FIG. VV sectional view in FIG. FIG. 2 is a longitudinal sectional view showing a state in which a male connector is connected to the co-injection portion of the connector shown in FIG. 1; FIG. 7 is a vertical cross-sectional view showing a state in which a cap covering an opening to the outside of the air passage is attached in the connector shown in FIG. 6 ;

Hereinafter, in order to clarify the present invention more specifically, embodiments of the present invention will be described in detail with reference to the drawings.

First, FIGS. 1 to 5 show a three-way stopcock 10 as one embodiment of the connector according to the present invention. This three-way stopcock 10 has a first connection port 14, a second connection port 16, and a third connection port 18 that form a liquid flow path 12, and these three connection ports 14, 16, 18 is provided with a switching valve 20 for connecting and disconnecting at least one of the ports 18 to other connection ports. In the following description, the vertical direction refers to the front-to-back direction of the page in FIG.

More specifically, the three-way stopcock 10 has a structure in which a cock 24 is attached to a holder 22 .

The holder 22 has a vertically extending substantially cylindrical holder body 26, and the tubular body extends radially outward from the center portion of the holder body 26 in the vertical direction at three points on the circumference. First, second and third connection ports 14, 16 and 18 are formed by these three tubular bodies. In this embodiment, the first connection port 14 projects from the holder body 26 to the right in FIG. 1, while the second connection port 16 projects from the holder body 26 to the left in FIG. there is Also, the third connection port 18 protrudes upward in FIG. 1 from the holder body 26 . That is, the first connection port 14 and the second connection port 16 extend substantially linearly through the holder body 26, and the third connection port 18 is connected from the holder body 26 to these first and second connection ports. It extends in a direction orthogonal to the two connection ports 14,16. These first, second, and third connection ports 14 , 16 , 18 are opened on the inner peripheral surface of the holder body 26 . In this embodiment, an annular locking claw 27 protruding inwardly is provided at the lower end portion of the inner peripheral surface of the holder main body 26 .

Here, in this embodiment, the first connection port 14 is a female luer, and a male luer such as a syringe or a male connector can be connected from the outside. In particular, a male threaded portion 28 is formed on the outer peripheral surface of the opening of the radially outer end of the first connection port 14 (the tip in the direction of projection from the holder body 26), and can be used for luer lock type syringes and male connectors. etc. can be connected.

The second connection port 16 is a male luer and can be connected to a female luer such as a connector. In particular, a substantially tubular lock adapter 30 is externally attached to the second connection port 16 , and a female screw portion 32 is formed on the inner peripheral surface of the lock adapter 30 . Thereby, a luer lock type female connector or the like can be connected to the second connection port 16 . In this embodiment, a protrusion is provided on the outer peripheral surface of the second connection port 16 and a protrusion is provided on the inner peripheral surface of the lock adapter 30. , the lock adapter 30 is prevented from coming off from the second connection port 16 . Further, the lock adapter 30 has an uneven outer peripheral surface so that the user can easily grip the lock adapter 30 when connecting to the female connector of the second connection port 16 .

Furthermore, the third connection port 18 can be externally connected with a male luer such as a syringe or a male connector. In particular, the medical connector 34 is attached to the opening of the radially outer end of the third connection port 18 (the tip in the direction of projection from the holder body 26). The structure of the medical connector 34 is not limited in any way, but in this embodiment, the housing 36 of the medical connector 34 is of a divided structure consisting of outer and inner housings 38 and 40. An elastic valve 42 is sandwiched and supported by housings 38 and 40 of . By fixing the outer and inner housings 38 and 40 to the opening of the third connection port 18 while sandwiching the elastic valve 42 , the opening of the medical connector 34 is sealed by the elastic valve 42 . ing. In short, the opening of the third connection port 18 is sealed by the elastic valve 42 of the medical connector 34 . In this embodiment, a male threaded portion 44 is provided on the outer peripheral surface of the outer housing 38, and a luer lock type syringe or male connector can be connected to the medical connector 34 (third connection port 18). It is said that In addition, although the mounting structure of the medical connector 34 to the third connection port 18 is not limited at all, for example, the medical connector 34 and/or the third connection port 18 may be attached to each other. A non-removable locking mechanism may be provided.

Further, inside the third connection port 18, an opening (elastic valve 42) is provided inside the third connection port 18 from the inner peripheral surface of the holder body 26 to which the switching valve 20 (cock 24) is fitted. A guide wall 45 projecting toward is formed. The guide wall 45 extends on a plane orthogonal to the liquid flow path 12 connecting the first and second connection ports 14, 16, and bisects the internal flow path of the third connection port 18. It's becoming Then, as shown in FIG. 4, when the first to third connection ports 14, 16, 18 are communicated with each other by the switching valve 20 (a communication groove 52, which will be described later), the first and second connections The liquid flowing through the liquid channel 12 connecting the ports 14 and 16 is guided along the surface of the guide wall 45 so as to go around the liquid channel 12 in the third connection port 18, thereby Liquids (including mixed injection liquids) are prevented from staying in the connection port 18 . 5 to 7, the cross-sectional line VV in FIG. 2 is positioned laterally off the central axis of the third connection port 18, thereby avoiding the guide wall 45. .

Furthermore, a slit 46 is provided in the central portion of the elastic valve 42, and a connection needle 68 of a male connector 66, which will be described later, is inserted through the slit 46, thereby connecting the male connector 66 and the third connection port 18. (three-way stopcock 10) are brought into communication with each other, and the connecting needle 68 is removed from the slit 46, thereby closing the slit 46 and opening the medical connector 34 (third connection port 18). It is designed to be sealed.

On the other hand, the cock 24 has a substantially cylindrical insertion portion 48 extending in the vertical direction, and an intermediate plate portion 50 extending in a direction perpendicular to the vertical direction is formed in the axially intermediate portion of the insertion portion 48 . ing. The outer diameter dimension of the insertion portion 48 is substantially equal to or slightly larger than the inner diameter dimension of the holder main body 26 . A communication groove 52 that opens outward and extends in the circumferential direction is formed on the outer peripheral surface of the insertion portion 48 at the position where the intermediate plate portion 50 is formed. When the cock 24 is attached to the holder 22, the communication groove 52 is substantially aligned with the opening positions of the first, second and third connection ports 14, 16 and 18 on the inner peripheral surface of the holder body 26 and in the vertical direction. The groove width dimension (vertical dimension) is equal to the first, second and third connections on the inner peripheral surface of the holder body 26. It has a size approximately equal to the opening width of the ports 14 , 16 , 18 .

In addition, levers 54, 54, 54 projecting radially outward are provided at three locations on the periphery of the upper end of the insertion portion 48. As shown in FIG. These levers 54 , 54 , 54 are formed at positions corresponding to the communication groove 52 on the circumference. One lever 54 protrudes from the central portion of the communication groove 52 in the circumferential direction. In short, of the three levers 54, 54, 54, two levers 54, 54 protrude so as to be positioned on the same straight line, and the remaining one lever 54 is positioned relative to these two levers 54, 54. It protrudes in a direction orthogonal to the

Furthermore, a tapered surface 56 whose outer diameter gradually decreases toward the bottom is provided on the outer peripheral surface of the lower end of the insertion portion 48, and above the tapered surface 56, an annular shape that opens to the outer peripheral side is provided. A locking groove 58 is provided. By providing the tapered surface 56 and the locking groove 58, the lower end portion of the insertion portion 48 is made relatively thin, and the lower end portion of the insertion portion 48 is elastically deformable in the radial direction.

The cock 24 is attached to the holder 22 by inserting the insertion portion 48 of the cock 24 having such a structure into the holder body 26 of the holder 22 in a substantially press-fit state from above. In this embodiment, the taper surface 56 of the lower end portion of the insertion portion 48 abuts against the locking claw 27 of the inner peripheral surface of the holder main body 26, thereby elastically deforming the lower end portion of the insertion portion 48 toward the inner peripheral side. As the locking claw 27 climbs over the tapered surface 56 , the lower end portion of the insertion portion 48 is elastically deformed for restoration, and the locking claw 27 is locked in the locking groove 58 , preventing the cock 24 from falling off from the holder 22 . It is designed to be prevented. When the cock 24 is attached to the holder 22 , the cock 24 is rotatable relative to the holder 22 about the center axis of the holder body 26 extending vertically.

1 to 5, the levers 54, 54, 54 projecting from the upper end of the cock 24 are connected to the first, second, and third connection ports 14, 16, 18 projecting from the holder 22. provided at corresponding positions. That is, the openings of the first and second connection ports 14 and 16 on the inner peripheral surface of the holder body 26 are connected to both ends of the communication groove 52 in the circumferential direction, and the center of the communication groove 52 in the circumferential direction is connected. The opening of the third connection port 18 on the inner peripheral surface of the holder body 26 is connected to the portion. Therefore, in the state shown in FIGS. 1 to 5, the first, second and third connection ports 14, 16, 18 are communicated by the communication groove 52. FIG.

1 to 5, the cock 24 is rotated 180 degrees about the central axis with respect to the holder 22 (that is, the lever 54 projecting upward in FIG. 1 is projected downward in FIG. 1). ), the communication state between the first connection port 14 and the second connection port 16 is maintained, while the opening of the third connection port 18 on the inner peripheral surface of the holder body 26 is opened. , the insertion portion 48 is closed by a portion where the communication groove 52 is not formed. That is, the main liquid channel 12 is configured including the first connection port 14 and the second connection port 16, and the third connection port 18 communicates and blocks the liquid channel 12. The switching valve 20 for switching between is configured to include a portion provided with a communicating groove 52 and a portion not provided on the circumference of the insertion portion 48 of the cock 24 . In short, by switching the switching valve 20 with respect to the liquid flow path 12 including the first connection port 14 and the second connection port 16 which are in communication with each other, the third flow path serving as a sub flow path is formed. The connection port 18 is adapted to be properly communicated or blocked, and the liquid is co-infused into the liquid channel 12 through the third connection port 18 as required. Therefore, in the present embodiment, the third connection port 18 constitutes a co-injection section that communicates with and is blocked from the liquid flow path 12 by switching the switching valve 20 .

Of course, the switching valve 20 can switch not only the communication and blocking of the third connection port 18 but also the communication and blocking of the first connection port 14 and the second connection port 16 . That is, since the port of the cock 24 in the direction in which the lever 54 extends is communicated (in other words, the port in the direction in which the lever 54 does not protrude is blocked), for example, the cock 24 is rotated counterclockwise from the state shown in FIG. It is possible to block only the first connection port 14 by rotating it 90 degrees, and it is possible to block only the second connection port 16 by rotating the cock 24 clockwise 90 degrees from the state shown in FIG. is possible. That is, the switching valve 20 is capable of communicating and blocking at least one of the first, second and third connection ports 14, 16 and 18 with respect to the other connection ports. .

In the three-way stopcock 10, the holder main body 26 of the present embodiment is provided with a thick portion 60 in which a portion of the circumference (upper portion in FIG. 2) is thickened. That is, the thick portion 60 is provided in the holder main body 26 in the same direction as the direction in which the third connection port 18 protrudes, and the thick portion 60 continues downward from the third connection port 18. extending out. In this embodiment, the thick portion 60 is formed in a substantially semicircular shape, and the lower end of the thick portion 60 is positioned substantially equal to the lower end of the holder main body 26 in the vertical direction.

A circular through hole 62 penetrating vertically is formed in the substantially central portion of the thick portion 60 . That is, the upper end of the through hole 62 is open to the inner surface of the third connection port 18 , and the internal space and the external space of the third connection port 18 are communicated by the through hole 62 . Thus, in this embodiment, the through hole 62 constitutes an air passage that communicates the internal space of the third connection port 18 with the external space. In particular, in this embodiment, the opening of the through-hole 62 on the inner surface of the third connection port 18 is the end of the third connection port 18 opposite to the medical connector 34, that is, the other connection port ( It is provided at a position near the end of the side connected to the first and second connection ports 14, 16). The through-hole 62 may have a straight shape with a substantially constant inner diameter, or may have a tapered shape with a gradually decreasing diameter toward the third connection port 18, for example.

Here, a substantially columnar filter 64 is provided inside the through hole 62 . This filter 64 has the property of allowing passage of gas and blocking passage of liquid. The filter 64 is not particularly limited as long as it has the above properties. A sintered porous body, a hydrophobic non-woven fabric, a porous body, or the like can be preferably employed. In particular, when a sintered body containing a superabsorbent polymer (SAP) is adopted as the filter 64, gas is allowed to pass through the filter 64 in the initial state until the moisture touches the filter 64, and moisture is allowed to pass through the filter 64. When touched, it reacts with water (absorbs moisture) and swells, preventing the passage of gas, so it can stably exhibit the effects of air venting, which will be described later, and the exposure and leakage prevention of liquids such as chemicals. . The outer diameter dimension of the filter 64 before being arranged is preferably larger than the inner diameter dimension of the through hole 62, and the filter 64 is arranged in the through hole 62 in a radially compressed state. Accordingly, the filter 64 can be positioned within the through hole 62, and the liquid impermeability can be improved. As for the filter, in addition to the three-dimensional filter 64 as in the present embodiment, for example, a planar membrane structure filter or the like can be employed. The shape of the filter may substantially correspond to the shape of the through-hole. Positioning may be fixed by taper fitting. Moreover, the filter is not limited to being fixed by the shape of the filter, and the filter may be fixed by another member.

The three-way stopcock 10 of the present embodiment having the structure as described above is used for administering a liquid medicine such as an anticancer drug. That is, in a state in which the cock 24 (switching valve 20) is operated to shut off the third connection port 18, the first connection port 14 is filled with a drug solution that alleviates or prevents the side effects of anticancer drugs. A male connector provided on the end of the tube extending from the sealed bag is connected and connected to the second connection port 16 on the end of the tube extending from the end of the catheter that is passed through the patient. A female connector is connected. As a result, the patient is administered a drug solution that alleviates or prevents side effects of the anticancer drug (premedication).

Thereafter, as shown in FIG. 6, the medical connector 34 of the third connection port 18 is connected to the male connector 66 provided at the end of the tube extending from the bag containing the anticancer drug. .

Although the structure of the male connector 66 is not particularly limited, it is preferable that the flow path in the male connector 66 is blocked before connection to the medical connector 34 . The male connector 66 of this embodiment has a hollow connection needle 68 that functions as a male luer, and the proximal end of the connection needle 68 is fixed to a substantially cylindrical housing 70 . A female threaded portion 78 that is screwed with the male threaded portion 44 of the medical connector 34 is provided on the inner peripheral surface of the cylindrical housing 70 .

To connect the male connector 66 having such a structure to the medical connector 34, first, the male threaded portion 44 of the medical connector 34 and the female threaded portion 78 of the male connector 66 are screwed together. As a result, the tip portion of the connecting needle 68 passes through the elastic valve 42 and is inserted into the medical connector 34 . That is, in the present embodiment, the connecting portion through which the hollow connecting needle 68 is inserted from the outside through the elastic valve 42 includes the medical connector 34 . When connecting the male connector 66 and the medical connector 34, it is easier to operate if the medical connector 34 is directed upward and the male connector 66 is connected from above, but the direction of the three-way stopcock 10 is limited. isn't it.

Here, a male connector provided at the end of a tube extending from a bag containing an anticancer drug (not shown) is connected to the base end side opening 80 of the male connector 66, and the inner space of the bag and the inner space of the bag are connected. The inner hole of the connecting needle 68 is communicated, and the inner hole of the connecting needle 68 is communicated with the medical connector 34 and the third connection port 18 through an opening provided at the tip of the connecting needle 68. ing. As a result, the anticancer drug enclosed in the bag is caused to flow into the medical connector 34 and the third connection port 18, and the air pushed out by the anticancer drug is discharged to the external space through the through hole 62. be done. In particular, when the user turns the three-way stopcock 10 upside down to direct the opening side of the third connection port 18 (the side on which the medical connector 34 is provided) downward, the housing of the male connector 66 Air bubbles in 70 and third connection port 18 rise toward cock 24 and are efficiently discharged to the external space through through hole 62 . As a result, priming of the medical connector 34 and the third connection port 18 before administration of the anticancer drug is achieved. On the other hand, since the filter 64 is provided in the through-hole 62, exposure and leakage of the anticancer drug through the through-hole 62 are prevented. During priming, the first connection port 14 and the second connection port 16 may be in a communicating state or in a blocked state. can be done.

After completing the priming of the third connection port 18 and the medical connector 34 as described above, the cock 24 (switching valve 20) is operated to communicate the third connection port 18 with the liquid flow path 12. In this state, the anticancer drug is administered to the patient without air bubbles entering the liquid channel 12 . At that time, the first connection port 14 may be blocked by the switching valve 20, or may be maintained in communication. After the anticancer drug is administered, the male screw portion 44 and the female screw portion 78 are unscrewed and the male connector 66 is removed from the medical connector 34, whereby the slit 46 is elastically deformed for medical use. The open portion of connector 34 is resealed. However, after the male connector 66 is connected to the medical connector 34, the male connector 66 may be non-removable from the medical connector 34, and as a single use, the male connector 66 may be removed after administration of the anticancer drug. The medical connector 34 (three-way stopcock 10) may be discarded together. By adopting such an aspect, the exposure and leakage of the chemical solution can be prevented more reliably.

After priming is completed, as shown in FIG. 7, the opening (lower opening) 81 of the through-hole 62 to the outside is preferably covered with a cap 82 . That is, as the filter 64 according to the present invention, a filter that allows passage of gas but not liquid is employed. Since there is a limit of , if the liquid contacts the filter with an excessively large pressure, the liquid (chemical solution) can pass through the filter if the limit of the liquid impermeability of the filter is exceeded. Here, by covering the opening 81 of the through hole 62 to the outside with the cap 82, exposure and leakage of the drug solution such as the anticancer agent through the through hole 62 are more reliably prevented, and the through hole 62 is Air can also be prevented from entering the third connection port 18 through the . The shape of the cap 82 is not limited as long as it can cover the opening 81 of the through hole 62 to the outside. It is shaped so as to cover the lower opening 81 at the same time. That is, the cap 82 includes a bottom wall portion 84 that covers the lower opening portion of the holder body 26 and the lower opening portion 81 of the through hole 62, and the bottom wall portion 84 has a generally annular shape that protrudes upward. A fitting protrusion 86 and a substantially circular insertion protrusion 88 are provided. The fitting projection 86 is fitted into the annular gap between the holder main body 26 and the tapered surface 56 at the lower end of the insertion portion 48 , and the insertion projection 88 is positioned against the lower opening 81 of the through hole 62 . The cap 82 is attached to the lower part of the holder main body 26 by inserting it from below, and the lower opening part of the holder main body 26 and the lower opening part 81 of the through hole 62 are covered with the bottom wall part 84 . ing. The cap 82 is configured so as to be sealed so that the inside of the holder body 26 does not pass through the outside air, and it is preferable that the medicine in the holder body 26 does not evaporate and escape to the outside. The cap 82 is detachable, and is detached from the holder main body 26 after detaching the male connector 66 from the medical connector 34, for example. Also, the cap 82 may be fixed to the holder main body 26 or may be fixed to another member that fixes the filter 64 .

Of course, the cap 82 may be attached to the lower opening of the holder body 26 and the opening 81 of the through hole 62 in a non-removable manner from the beginning. That is, in the cap 82 shaped as described above, a groove is provided on the outer peripheral surface of the insertion protrusion 88, and the air in the medical connector 34 and the third connection port 18 is discharged to the external space through the groove during priming. It may be designed to be Further, by providing the cap 82 from the beginning in this manner, it becomes possible to dispose the filter 64 so as to be pushed into the through hole 62 by the insertion protrusion 88 . Even in the mode in which the cap 82 is fitted after the completion of priming as described above, or in the mode in which the cap 82 is fixedly attached from the beginning, the provision of the cap 82 allows the anticancer agent, etc. Since it is impossible to interfere with the filter 64 in contact with the chemical solution from the outside, exposure and leakage of the chemical solution can be effectively prevented.

In the three-way stopcock 10 of the present embodiment configured as described above, after priming is completed, the switching valve 20 can be switched without removing the male connector 66 from the medical connector 34 (third connection port 18). Since drug solutions such as cancer drugs are administered, exposure and leakage of drug solutions are prevented compared to removing the male connector and reconnecting it to the liquid flow path after priming with a priming cap or circulation line. can be

Further, in this embodiment, the third connection port 18 is provided with the medical connector 34 having the elastic valve 42, and the opening of the third connection port 18 is sealed by the elastic valve 42. , foreign matter is prevented from entering the third connection port 18 before the male connector 66 is connected. In addition, since the opening of the third connection port 18 is sealed by the elastic valve 42 even after the connection needle 68 is pulled out, the chemical solution such as the anticancer drug remaining in the third connection port 18 is not exposed. and leakage can be prevented.

Furthermore, in this embodiment, the through hole 62 that communicates the third connection port 18 with the outside is connected to the other connection ports (the first and second connection ports 14 and 16) at the third connection port 18. , i.e., the end opposite to the side on which the medical connector 34 is provided, the through hole 62 is caused to flow into the third connection port 18 during priming. The air in the third connection port 18 can be discharged stably by being pushed out by the liquid such as the anticancer drug, avoiding problems such as being closed by the liquid.

Furthermore, by covering the opening of the through-hole 62 to the outside with the cap 82 after the priming is finished, exposure and leakage of the chemical liquid through the through-hole 62 and entry of air into the third connection port 18 are prevented. obtain. The cap 82 may be connected to the three-way stopcock 10 by a string or the like, or may be temporarily attached to the opening 81 of the through hole 62 and pushed into the through hole 62 after priming. may

Although the embodiments of the present invention have been described above, the present invention is not to be construed as being limited by the specific descriptions in such embodiments, and various changes, modifications, improvements, etc. based on the knowledge of those skilled in the art. It is possible to implement in a mode in which

For example, in the above-described embodiment, the communication groove 52 is formed on the outer peripheral surface of the insertion portion 48 of the cock 24, and the switching valve 20 is configured including the communication groove 52. However, it is limited to such an aspect. Instead, any conventionally known stopcock structure can be adopted. Furthermore, the switching valve may be configured to temporarily block at least one connection port, and may be realized by, for example, a disk valve that is opened by an actuator or a destructible wall.

Further, in the above embodiment, the three-way stopcock 10 was exemplified as the connector according to the present invention, but it may be a one-way stopcock, a two-way stopcock, a four-way stopcock, etc., or a multiple stopcock in which a plurality of these stopcocks are continuous. There may be. Furthermore, even in the case of a three-way stopcock, the connection port provided with the air passage and the filter is not limited to the third connection port serving as the co-injection section, instead of or in addition to the third connection port. Alternatively, it may be provided in the first connection port or the second connection port that constitute the main liquid flow path.

Furthermore, in the above embodiment, a separate medical connector 34 was provided for the third connection port 18, but such a medical connector is not essential. Also, the elastic valve is not essential, and even if it is provided, it may be provided directly at the third connection port, for example.

Furthermore, in the above-described embodiment, the holder body 26 is provided with the thick portion 60, and the through hole 62 passing through the thick portion 60 is provided, so that the internal space and the external space of the third connection port 18 are separated. Although an air passage communicating with the space is configured, the present invention is not limited to such an aspect. That is, the air passage may be provided through the housing of the medical connector attached to the third connection port or through the peripheral wall of the third connection port near the opening. By adopting such a mode, operations such as turning the three-way stopcock 10 upside down during priming can be omitted.

Furthermore, in the above embodiment, the cap 82 was provided to cover the opening to the outside of the through-hole 62 after priming, but such a cap is not essential. By providing such a cap, it becomes impossible to access the filter in contact with the drug such as an anticancer drug from the outside, so that the exposure and leakage of the drug are more reliably prevented. obtain.

Also, the structure of the male connector connected to the third connection port is not limited in any way.

In the above-described embodiment, the fluid that flows in the liquid channel 12 is exemplified by a drug solution such as an anticancer drug, but water, blood, an infusion solution, or the like may also be used.

Further, the connector according to the present invention may be provided with display means for indicating the opening direction of the switching valve during priming.

10: three-way stopcock (connector), 12: liquid flow path, 14: first connection port, 16: second connection port, 18: third connection port (mixed injection part), 20: switching valve, 34: Medical connector (connecting part), 42: elastic valve, 62: through hole (air passage), 64: filter, 81: opening, 82: cap

Claims (5)

A connection comprising a plurality of connection ports to which an external flow path can be connected to form a liquid flow path, and a switching valve for connecting and disconnecting at least one of the connection ports to and from the other connection ports. in the connector,
The switching valve is a switching valve that can be repeatedly switched, and the connection port communicated and blocked by the switching valve communicates the internal liquid flow path with the external space while being blocked from the other connection port. A connection connector, comprising: an air passage that allows air to pass through and a filter that prevents liquid from passing through the air passage. 2. The co-infusion section according to claim 1, wherein the third connection port is connected and blocked by the switching valve with respect to the liquid flow path formed by the first and second connection ports that communicate with each other. connector. The connection port, which is communicated and blocked by the switching valve, is provided with an elastic valve that seals the opening, and is provided with a connection portion through which a hollow connection needle is inserted from the outside through the elastic valve. 3. The connector according to claim 1 or 2, wherein 4. The connection according to any one of claims 1 to 3, wherein the air passage is provided at a position close to a connection side end to another connection port in the connection port communicated and blocked by the switching valve. connector. The connector according to any one of claims 1 to 4, wherein the air passage is detachably provided with a cap covering an opening to the outside.

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