JP2020058650A - Connection connector - Google Patents

Abstract

To provide a connection connector of a novel structure where operation of a priming is excellent and exposure and leakage of liquid after priming can be suppressed.SOLUTION: In a connection connector 10 which has a plurality of connection ports 14, 16, 18 forming a liquid flow path 12 and a switching valve 20 which communicates and disconnects at least one connection port 18 with and from other connection ports 14, 16, the connection port 18 communicated and disconnected by the switching valve 20 is provided with an air passage 62 causing the inside liquid flow path 12 to communicate with an outside space and a filter 64 which allows the air to pass in the air passage 62 and blocks passage of liquid.SELECTED DRAWING: Figure 5

Description

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

  BACKGROUND OF THE INVENTION Conventionally, in a liquid flow path in the medical field, when a sub flow path is connected to a main flow path, such as when another liquid is administered during or after administration of a liquid such as a drug solution, a plurality of A connection connector having a connection port is used. Specifically, for example, the three-way stopcock shown in FIGS. 1 and 2 of JP 2010-148757 A (Patent Document 1) is known.

  Generally, a three-way stopcock has a switching valve that connects and disconnects a main liquid flow path formed between two connection ports with a sub liquid flow path formed by another one connection port. There is. Then, for example, when an anticancer agent is administered, a premedication drug solution is administered through the main liquid channel, and the anticancer agent is administered through the sub liquid channel before, during, or after the premedication. Is administered.

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

  Here, when connecting the drug solution flow path of the anticancer agent to the three-way stopcock, a priming operation is performed for the purpose of preventing the residual air in the flow path from being mixed. Priming operation, for example, by attaching the priming cap equipped with an air vent filter to the male connector at the end of the tube extending from the drug solution bag, letting out the anticancer drug from the drug solution bag and discharging the air from the priming cap. To be executed. Alternatively, a method of connecting the male connector at the tip of the tube to the mixed injection tube provided on the tube to form a circulation line and circulating the anticancer agent in the circulation line to discharge air into the medical bag is also possible. Proposed.

  However, in any of the conventional priming methods, it is necessary to remove the priming cap or remove the male connector from the circulation line after the priming is finished, and then reconnect the male connector to the main liquid flow path. was there. Therefore, the priming operation is troublesome, and there is a risk that the anti-cancer agent may be exposed or leaked to the outside in the male connector removed after the priming.

JP, 2010-148757, A

  The present invention has been made in the background of the above circumstances, and the problem to be solved is that the operation of priming is good, and the exposure and leakage of liquid after priming can be suppressed, and a novel structure Providing a connection connector.

  Hereinafter, embodiments of the present invention made to solve such problems will be described. The constituent elements used in each of the following aspects can be used in any combination as much as possible.

  A first aspect of the present invention is a connection including a plurality of connection ports forming a liquid flow path, and a switching valve that connects and disconnects at least one of the connection ports with other connection ports. In the connector, the connection port, which is opened and closed by the switching valve, is provided with an air passage that connects the liquid passage inside to the external space, and allows passage of air in the air passage. It is characterized in that a filter for preventing passage of the liquid is provided.

  According to the connector having the structure according to the present aspect, the liquid is caused to flow from the liquid flow path connected to the connection port, whereby the mixed air is discharged to the external space through the filter, and priming is achieved. Therefore, in this aspect, it is not necessary to remove or reconnect the male connector after the priming is completed, the priming operation is facilitated, and the exposure and leakage of the liquid after the priming is suppressed.

  A second aspect of the present invention is the connection connector according to the first aspect, wherein the third connection port is the switching valve with respect to the liquid flow path by the first and second connection ports that are in communication with each other. The mixed injection part is configured by being communicated and blocked by.

  Since the connection connector having the structure according to the present embodiment is applied to, for example, a three-way stopcock, it is possible to additionally administer liquid to the liquid flow path through the co-infusion part.

  According to a third aspect of the present invention, in the connection connector according to the first or second aspect, an elastic valve that seals an opening portion is provided in the connection port that communicates with and is blocked by the switching valve. In addition, a connection portion is provided which penetrates the elastic valve and into which a hollow connection needle is inserted from the outside.

  According to the connector having the structure according to the present aspect, the elastic valve achieves the sealing of the opening portion of the connection port before the insertion of the connecting needle to prevent foreign matter from entering and the connecting needle after administration of the liquid. The elastic valve also achieves resealing of the opening of the connection port.

  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 with and cut off 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 having the structure according to the present aspect, the air passage is provided at a position close to the end on the side of connection to another connection port, that is, at a position far from the opening part or the sealing part of the connection port. It is possible to reduce the possibility of the air bubbles coming off from the connector being deteriorated, and the possibility that the liquid flowing in the connection port will block the air passage.

  A fifth aspect of the present invention is the connection connector according to any one of the first to fourth aspects, wherein a cap that covers an opening to the outside is detachably provided in the air passage. is there.

  According to the connector having the structure according to the present aspect, by mounting the cap on the opening of the air passage after priming, exposure and leakage of liquid through the air passage, re-mixing of air into the connection port, and the like are more likely. It can be surely prevented.

  According to the connector having the structure according to the present invention, the priming operation is facilitated, and the exposure and leakage of the liquid after the priming is suppressed without the need to remove or reconnect the male connector after the priming.

The top view which shows the connection connector as one Embodiment of this invention. The bottom view in the connection connector shown by FIG. FIG. 3 is a right side view of the connection connector shown in FIG. 1. IV-IV sectional drawing in FIG. V-V sectional drawing in FIG. FIG. 2 is a vertical cross-sectional view showing a state in which a male connector is connected to a mixed injection part in the connection connector shown in FIG. 1. FIG. 7 is a vertical cross-sectional view showing a state in which a cap covering an opening of the air passage to the outside is attached to the connection 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 a connection connector according to the present invention. The 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, A switching valve 20 is provided which connects and disconnects at least one of the connection ports 18 with other connection ports. In the following description, the up-down direction means the front-back direction on the paper surface in FIG.

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

  This holder 22 is provided with a substantially cylindrical holder body 26 extending in the vertical direction, and the tubular body is radially outward at three locations on the circumference from the central portion of the holder body 26 in the vertical direction. These three pipes are formed so as to project, and the first, second, and third connection ports 14, 16, and 18 are formed by these three pipes. In the present 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. Further, the third connection port 18 projects upward from the holder body 26 in FIG. 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 extends from the holder body 26 to the first and second connection ports. It extends in a direction orthogonal to the two connection ports 14 and 16. The first, second and third connection ports 14, 16 and 18 are open on the inner peripheral surface of the holder body 26. In the present embodiment, the lower end portion of the inner peripheral surface of the holder body 26 is provided with an annular locking claw 27 that protrudes toward the inner peripheral side.

  Here, in the present 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 screw portion 28 is formed on the outer peripheral surface of the opening at the radially outer end (tip in the protruding direction from the holder body 26) of the first connection port 14, and a luer lock type syringe or male connector is formed. 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 cylindrical lock adapter 30 is externally mounted on the second connection port 16, and a female screw portion 32 is formed on the inner peripheral surface of the lock adapter 30. As a result, a luer lock type female connector or the like can be connected to the second connection port 16. In the present 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, and the protrusions are engaged with each other. The lock adapter 30 is prevented from coming off from the second connection port 16. Further, the outer peripheral surface of the lock adapter 30 is provided with irregularities so that the user can easily grasp the lock adapter 30 when connecting the second connection port 16 to the female connector.

  Further, the third connection port 18 can be connected to a male luer such as a syringe or a male connector from the outside. In particular, the medical connector 34 is attached to the opening at the radially outer end (tip in the protruding direction from the holder body 26) of the third connection port 18. Although the structure of the medical connector 34 is not limited in any way, in the present embodiment, the housing 36 of the medical connector 34 has a split structure including outer and inner housings 38 and 40. An elastic valve 42 is sandwiched between and supported by the housings 38 and 40. Then, the housings 38 and 40 inside and outside are fixed to the opening of the third connection port 18 with the elastic valve 42 sandwiched therebetween, so that the opening of the medical connector 34 is sealed by the elastic valve 42. ing. In short, the opening portion of the third connection port 18 is sealed by the elastic valve 42 of the medical connector 34. In addition, in the present embodiment, the male screw portion 44 is provided on the outer peripheral surface of the outer housing 38, and a luer lock type syringe or a male connector can be connected to the medical connector 34 (third connection port 18). It is said that. Further, the attachment structure of the medical connector 34 to the third connection port 18 is not limited in any way, but for example, the medical connector 34 and / or the third connection port 18 are attached to each other by mutual attachment. A lock mechanism that cannot be detached may be provided.

  Further, inside the third connection port 18, from the inner peripheral surface of the holder main body 26 to which the switching valve 20 (cock 24) is fitted and attached, the inside of the third connection port 18 is opened (elastic valve 42). A guide wall 45 that projects 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 and 16, and divides the internal flow path of the third connection port 18 into two parts. Has become. Then, as shown in FIG. 4, in the state where the first to third connection ports 14, 16 and 18 are communicated with each other by the switching valve 20 (communication groove 52 described later), the first and second connection are performed. The liquid flowing in the liquid flow path 12 connecting the ports 14 and 16 is guided along the surface of the guide wall 45 so as to wrap around the liquid flow path 12 in the third connection port 18, whereby Liquid (including mixed injection liquid) is prevented from staying in the connection port 18. Note that, in FIGS. 5 to 7, the VV cross-section line in FIG. 2 is shown at a position laterally offset from the central axis of the third connection port 18 so as to avoid the guide wall 45. .

  Furthermore, a slit 46 is provided in the central portion of the elastic valve 42, and a connecting needle 68 of a male connector 66, which will be described later, is inserted into the slit 46, so that the male connector 66 and the third connecting port 18 are connected. (Three-way stopcock 10) is brought into communication with each other, and the slit 46 is closed by removing the connecting needle 68 from the slit 46, and the opening portion of the medical connector 34 (third connecting port 18) is opened. It is designed to be sealed.

  On the other hand, the cock 24 includes a substantially cylindrical insertion portion 48 that extends in the vertical direction, and an intermediate plate portion 50 that extends in a direction orthogonal to the vertical direction is formed in an axially intermediate portion of the insertion portion 48. ing. The outer diameter of the insertion portion 48 is substantially equal to or slightly larger than the inner diameter of the holder body 26. Then, in the insertion portion 48, a communication groove 52 that is open to the outer peripheral side and extends in the circumferential direction is formed on the outer peripheral surface at the formation position of the intermediate plate portion 50. The communication groove 52 is substantially vertical 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 in the state where the cock 24 is attached to the holder 22. They are formed at the same position and have a circumferential length of approximately half circumference, and the groove width dimension (vertical dimension) is such that the first, second, and third connections on the inner circumferential surface of the holder body 26. The size is substantially equal to the opening width of the ports 14, 16 and 18.

  Further, at the upper end of the insertion portion 48, levers 54, 54, 54 projecting radially outward are provided at three locations on the circumference. These levers 54, 54, 54 are formed at positions corresponding to the communication groove 52 on the circumference, that is, the pair of levers 54, 54 are opposite to each other at the positions corresponding to both circumferential ends of the communication groove 52. In addition to projecting in one direction, one lever 54 projects in the central portion of the communication groove 52 in the circumferential direction. In short, of the three levers 54, 54, 54, the two levers 54, 54 are projected so as to be located on the same straight line, and the remaining one lever 54 is provided with respect to these two levers 54, 54. And project in a direction orthogonal to each other.

  Further, the outer peripheral surface at the lower end of the insertion portion 48 is provided with a tapered surface 56 whose outer diameter size gradually decreases downward, and above the tapered surface 56, an annular shape opening to the outer peripheral side. 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 from above in a substantially press-fitted state. In the present embodiment, the tapered surface 56 of the lower end portion of the insertion portion 48 abuts on the locking claw 27 of the inner peripheral surface of the holder body 26, whereby the lower end portion of the insertion portion 48 is elastically deformed to the inner peripheral side, and As the locking claw 27 moves over the tapered surface 56, the lower end portion of the insertion portion 48 elastically restores and deforms, the locking claw 27 is locked in the locking groove 58, and the cock 24 is removed from the holder 22. It is supposed to be prevented. When the cock 24 is attached to the holder 22, the cock 24 is rotatable with respect to the holder 22 around the central axis of the holder body 26 extending in the vertical direction.

  Here, in the state shown in FIGS. 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. It is provided at the corresponding position. 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 communication groove 52 has a center in the circumferential direction. 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 and 18 are communicated by the communication groove 52.

  It should be noted that the cock 24 is rotated 180 degrees about the central axis with respect to the holder 22 from the state shown in FIGS. 1 to 5 (that is, the lever 54 protruding upward in FIG. 1 is projected downward in FIG. 1). By rotating the first connection port 14 and the second connection port 16, the communication state of 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 flow path 12 is configured to include the first connection port 14 and the second connection port 16, and the third connection port 18 is connected to and disconnected from the liquid flow path 12. The switching valve 20 for switching between is configured to include a portion where the communication groove 52 is provided and a portion where the communication groove 52 is 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 becomes a sub flow path. The connection port 18 is appropriately communicated with or blocked from the liquid flow path 12, and the liquid is co-injected into the liquid flow path 12 through the third connection port 18 as necessary. Therefore, in the present embodiment, the mixed injection part that is connected to and cut off from the liquid flow path 12 by switching the switching valve 20 is configured by the third connection port 18.

  However, the switching valve 20 can switch not only the communication and cutoff of the third connection port 18 but also the communication and cutoff of the first connection port 14 and the second connection port 16. That is, in the cock 24, the ports in the direction in which the lever 54 extends are communicated (in other words, the ports in the direction in which the lever 54 does not project are blocked), so that the cock 24 is rotated counterclockwise from the state of FIG. 1, for example. It is possible to block only the first connection port 14 by rotating it 90 degrees to the right, and to block only the second connection port 16 by rotating the cock 24 clockwise 90 degrees from the state of FIG. Is possible. That is, the switching valve 20 is capable of connecting and disconnecting at least one of the first, second, and third connection ports 14, 16, and 18 with respect to other connection ports. .

  In the three-way stopcock 10, the holder main body 26 of the present embodiment is provided with a thick wall portion 60 having a thick wall at a part (upper side in FIG. 2) of the circumference. 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 projects, and the thick portion 60 is continuously provided downward from the third connection port 18. It is extended. In the present embodiment, the thick wall portion 60 is formed in a substantially semicircular shape, and the lower end of the thick wall portion 60 is substantially at the same position as the lower end of the holder body 26 in the vertical direction.

  Then, a circular through hole 62 penetrating in the vertical direction is formed in a substantially central portion of the thick portion 60. That is, the upper end of the through hole 62 opens 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 connected by the through hole 62. As a result, in the present embodiment, the air passage that connects the internal space of the third connection port 18 to the external space is formed by the through hole 62. Particularly, in the present 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 on the opposite side of the medical connector 34, that is, another connection port ( It is provided at a position close to the end on 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, for example, a tapered shape in which the diameter gradually decreases toward the third connection port 18.

  Here, a substantially cylindrical filter 64 is provided inside the through hole 62. The filter 64 has the property of permitting the passage of gas and blocking the passage of liquid. The filter 64 is not particularly limited as long as it has the above-mentioned properties, but for example, a high molecular material such as polyethylene and a material containing a hydrophilic, water-soluble or water-swellable polymer are sintered. A sintered porous body, a hydrophobic nonwoven fabric, a porous body, or the like can be preferably used. In particular, when a sintered body containing a super absorbent polymer (SAP) is used as the filter 64, gas is allowed to pass through in the initial state until the moisture contacts the filter 64, and the moisture is absorbed by the filter 64. When touched, it reacts with water (absorbs water) and swells to prevent the passage of gas, so the air bleeding described below and the exposure and leakage prevention effects of liquids such as chemicals can be stably exhibited. . It is preferable that the outer diameter of the filter 64 before being arranged is larger than the inner diameter of the through hole 62, and the filter 64 is arranged inside the through hole 62 in a state of being compressed in the radial direction. As a result, the filter 64 can be positioned in the through hole 62, and the impermeability of liquid can be improved. In addition to the three-dimensional filter 64 as in the present embodiment, for example, a filter having a planar membrane structure can be used as the filter. Note that the shape of the filter may substantially correspond to the shape of the through hole. For example, when the through hole and the filter are tapered with different taper angles, when the filter is arranged in the through hole, The position may be fixed by taper fitting. Further, the fixing is not limited to the filter shape, and the filter may be fixed by another member.

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

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

  The structure of the male connector 66 is not limited in any way, but it is preferable that the flow path inside the male connector 66 is blocked before the connection to the medical connector 34. The male connector 66 of the present embodiment includes a hollow connecting needle 68 having the function of a male lure, and the proximal end of the connecting needle 68 is fixed to a substantially tubular housing 70. Further, on the inner peripheral surface of the tubular housing 70, a female screw portion 78 that is screwed with the male screw portion 44 of the medical connector 34 is provided.

  To connect the male connector 66 having such a structure to the medical connector 34, first, the male screw portion 44 of the medical connector 34 and the female screw portion 78 of the male connector 66 are screwed together. As a result, the tip portion of the connecting needle 68 penetrates the elastic valve 42 and is inserted into the medical connector 34. That is, in the present embodiment, the connecting portion that penetrates the elastic valve 42 and into which the hollow connecting needle 68 is inserted from the outside is configured to include the medical connector 34. When connecting the male connector 66 and the medical connector 34, if the medical connector 34 is directed upward and the male connector 66 is connected from above, the operation is easy, but the orientation of the three-way stopcock 10 is not limited. is not.

  Here, a male connector provided on an end portion of a tube extending from a bag in which an anti-cancer agent is enclosed (not shown) is connected to a base end side opening 80 of the male connector 66, and is connected to an inner space of the bag. The inner hole of the connection needle 68 is communicated, and the inner hole of the connection needle 68 is communicated with the medical connector 34 and the third connection port 18 through an opening provided at the tip portion of the connection 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. To be done. In particular, the user turns the three-way stopcock 10 upside down to turn the opening side (the side on which the medical connector 34 is provided) of the third connection port 18 downward, so that the housing of the male connector 66 is Bubbles in the 70 and the third connection port 18 rise to the cock 24 side and are efficiently discharged to the external space through the through hole 62. As a result, priming of the medical connector 34 and the third connection port 18 before the administration of the anticancer agent is achieved. On the other hand, since the filter 64 is provided in the through hole 62, the anticancer agent is prevented from being exposed or leaked through the through hole 62. In addition, at the time of priming, the first connection port 14 and the second connection port 16 may be in a communicating state or may be in a blocking state, and priming may be performed during pre-medication or before and after pre-medication. Can be done.

  Then, after the priming of the third connection port 18 and the medical connector 34 is completed as described above, the cock 24 (switching valve 20) is operated to communicate the third connection port 18 with the liquid flow path 12. By setting the state, the anticancer drug is administered to the patient without bubbles mixed in the liquid flow path 12. At that time, the first connection port 14 may be blocked by the switching valve 20 or the communication state may be maintained. After administration of the anti-cancer agent, the male screw portion 44 and the female screw portion 78 are unscrewed to remove the male connector 66 from the medical connector 34, whereby the slit 46 is elastically deformed and deformed for medical treatment. The opening of the connector 34 is resealed. However, after connecting the male connector 66 to the medical connector 34, the male connector 66 may not be removable from the medical connector 34, and as a single use, after the administration of the anticancer agent, the male connector 66 is It may be discarded together with the medical connector 34 (three-way stopcock 10). By adopting such a mode, the exposure and leakage of the drug solution can be prevented more reliably.

  After the priming is completed, as shown in FIG. 7, the opening 81 (downward opening) to the outside in the through hole 62 is preferably covered with the cap 82. That is, as the filter 64 according to the present invention, a filter that allows gas to pass but does not allow liquid to pass is adopted, but of course, it does not have perfect liquid tightness in any state, and the liquid impermeability of the filter is Therefore, when the liquid comes into contact with the filter at an excessively large pressure, the liquid (chemical solution) may pass through the filter if the liquid impermeability limit of the filter is exceeded. Here, by covering the opening 81 to the outside in the through hole 62 with the cap 82, the exposure and leakage of the drug solution such as the anticancer agent through the through hole 62 can be prevented more reliably, and the through hole 62 can be more reliably prevented. It is also possible to prevent air from entering the third connection port 18 through. The shape of the cap 82 is not particularly limited as long as it is a shape that can cover the opening 81 to the outside of the through hole 62, but in the present embodiment, the lower opening of the holder body 26 and the through hole 62. It has a shape capable of simultaneously covering the lower opening 81. 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 substantially annular shape that projects upward. A fitting protrusion 86 and a substantially circular insertion protrusion 88 are provided. Then, the fitting protrusion 86 is fitted into the annular gap between the holder body 26 and the tapered surface 56 at the lower end of the insertion portion 48, and the insertion protrusion 88 is inserted into the lower opening 81 of the through hole 62. And the lower opening 81 of the through hole 62 is covered by the bottom wall portion 84 by mounting the cap 82 below the holder body 26 by inserting the cap 82 from below. ing. The cap 82 is configured to be hermetically sealed so that the inside of the holder main body 26 and the outside air are not ventilated, and it is preferable that the medicine in the holder main body 26 is vaporized and does not come out to the outside. The cap 82 is removable. For example, the male connector 66 is removed from the medical connector 34 and then removed from the holder body 26. Further, the cap 82 may be fixed to the holder body 26 or may be fixed to another member for fixing the filter 64.

  However, the cap 82 may be permanently attached to the lower opening of the holder body 26 and the opening 81 of the through hole 62 from the beginning. That is, in the cap 82 having the above-described shape, 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 during the priming through the groove. It may be done. Further, by adopting such a mode that the cap 82 is provided from the initial stage, it becomes possible to arrange the filter 64 so as to be pushed into the through hole 62 by the insertion protrusion 88. Even if the cap 82 is fitted after the priming is completed as described above or the cap 82 is fixedly attached from the beginning, the anti-cancer agent or the like can be provided by providing the cap 82. Since it is impossible to externally interfere with the filter 64 that is in contact with the chemical liquid, the exposure and leakage of the chemical liquid can be effectively prevented.

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

  Further, in the present embodiment, the medical connector 34 having the elastic valve 42 is provided in the third connection port 18, and the opening portion of the third connection port 18 is sealed by the elastic valve 42. Before the male connector 66 is connected, foreign matter is prevented from entering the third connection port 18. Further, even after the connection needle 68 is removed, the opening portion of the third connection port 18 is sealed by the elastic valve 42, so that the chemical liquid such as the anti-cancer agent remaining in the third connection port 18 is exposed. And leakage can be prevented.

  Furthermore, in the present embodiment, the through hole 62 that communicates the third connection port 18 to the outside is connected to the other connection ports (first and second connection ports 14 and 16) at the third connection port 18. The through hole 62 is allowed to flow into the third connection port 18 during priming because it is provided at a position close to the end on the side where the medical connector 34 is provided, that is, the end on the side opposite to the side where the medical connector 34 is provided. A problem such as being closed by a liquid is avoided, and the air in the third connection port 18 can be stably discharged by being pushed out by a liquid such as an anticancer agent.

  Furthermore, by covering the opening of the through hole 62 to the outside with the cap 82 after the priming is finished, it is possible to prevent the chemical solution from being exposed or leaked through the through hole 62 and to prevent the air from being mixed into the third connection port 18. obtain. Note that the cap 82 may be connected to the three-way stopcock 10 by a string or the like, and is pushed into the through hole 62 after priming, for example, from a state of being temporarily fixed to the opening 81 of the through hole 62. May be.

  Although the embodiments of the present invention have been described above, the present invention is not limitedly interpreted by the specific description of the embodiments, and various changes, modifications, improvements, etc. are based on the knowledge of those skilled in the art. Can be implemented in a mode in which is added.

  For example, in the above 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 to include the communication groove 52, but the invention is not limited to this mode. Instead, any conventionally known stopcock structure may be employed. Further, the switching valve may have a configuration that temporarily blocks at least one connection port, and may be realized by, for example, a disc valve opened by an actuator or a destructible wall.

  Further, in the above-described embodiment, the three-way stopcock 10 is exemplified as the connection connector according to the present invention, but one-way stopcock, two-way stopcock, four-way stopcock, or the like may be used, or a plurality of continuous stopcocks in which these stopcocks are continuous. It may be. Further, even when it is a three-way stopcock, the connection port where the air passage and the filter are provided is not limited to the third connection port which is the mixed injection part, and instead of or in addition to the third connection port. And may be provided in the first connection port or the second connection port that constitutes the main liquid flow path.

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

  Further, in the above-described embodiment, the thick wall portion 60 is provided in the holder body 26, and the through hole 62 penetrating the thick wall portion 60 is provided. Although the air passage communicating with the space is formed, the present invention is not limited to this mode. That is, an air passage may be provided through the housing of the medical connector attached to the third connection port or the peripheral wall of the third connection port near the opening. By adopting such a mode, an operation such as turning the three-way stopcock 10 upside down during priming can be omitted.

  Furthermore, in the above-described embodiment, the cap 82 that covers the opening of the through hole 62 to the outside is provided after the priming is finished, but such a cap is not essential. By providing such a cap, it is impossible to externally access the filter that is in contact with a drug solution such as an anti-cancer drug, so that the exposure or leakage of the drug solution can be more reliably prevented. obtain.

  Further, the structure of the male connector connected to the third connection port is not limited at all.

  In addition, in the above-mentioned embodiment, the liquid flowing through the liquid flow path 12 is exemplified by a chemical liquid such as an anticancer drug, but it may be water, blood, infusion liquid or the like.

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

10: Three-way stopcock (connection 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 part, 82: cap

Claims (5)

In a connection connector having a plurality of connection ports that form a liquid flow path, and a switching valve that connects and disconnects at least one of the connection ports with other connection ports,
The connection port, which is opened and closed by the switching valve, is provided with an air passage for connecting the internal liquid passage to the external space, and allows passage of air in the air passage and passage of liquid. A connector that is provided with a filter that blocks   The mixed injection part is configured by connecting and blocking the third connection port to and from the liquid flow path by the first and second connection ports that are in communication with each other. Connection connector.   An elastic valve that seals the opening is provided at the connection port that is communicated and blocked by the switching valve, and a connection portion that penetrates the elastic valve and receives a hollow connection needle from the outside is provided. The connector according to claim 1 or 2, which is provided.   The connection according to any one of claims 1 to 3, wherein the air passage is provided at a position close to an end portion on a side of connection to another connection port in the connection port that is connected and disconnected by the switching valve. connector.   The connection connector according to claim 1, wherein a cap that covers an opening to the outside is detachably provided in the air passage.

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