One end of a tubular portion (16) is sealed with a stopcock (5) that is fitted in the tubular portion (16). A first flow channel (33) and a second flow channel (36) are formed in the stopcock (5). A first hole (37), a second hole (43), a third hole (38), and a fourth hole (44) are formed in a connector main body (2). Switching between a setting that brings an inner space (16a) of the tubular portion (16) into communication with the first hole (37) via the first flow channel (33) and a setting that brings the inner space (16a) of the tubular portion (16) into communication with the second hole (43) via the first flow channel (33) and brings the third hole (38) into communication with the fourth hole (44) via the second flow channel (36) can be achieved by rotating the stopcock (5).
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1. A connector comprising:
a connector main body provided with a tubular portion; and
a stopcock that is fitted in the tubular portion so as to be rotatable around an axis of the tubular portion,
wherein one end of the tubular portion is sealed with the stopcock that is fitted in the tubular portion,
a first flow channel and a second flow channel are formed in the stopcock,
a first hole, a second hole, a third hole, and a fourth hole are formed in the connector main body,
the first, the second, the third, and the fourth holes are holes that bring an inner space of the tubular portion into communication with an external space of the connector main body,
the first, the second, the third, and the fourth holes are open to an inner circumferential surface of the tubular portion and facing the stopcock, and
the connector is configured to switch between a first setting that brings the inner space of the tubular portion into communication with the first hole via the first flow channel and a second setting that brings the inner space of the tubular portion into communication with the second hole via the first flow channel and brings the third hole into communication with the fourth hole via the second flow channel by rotating the stopcock.
2. The connector according to
wherein a first connecting portion and a second connecting portion are provided in the connector main body,
connecting ports are formed in the first and the second connecting portions,
the first and the third holes are in communication with a space in the first connecting portion, and
the second and the fourth holes are in communication with a space on the connecting port side of the second connecting portion.
3. The connector according to
4. The connector according to
5. The connector according to
6. The connector according to
7. The connector according to
8. The connector according to
9. The connector according to
10. The connector according to
11. The connector according to
12. The connector according to
wherein a check valve is provided in at least one of the third hole and the fourth hole, and when the stopcock is set to the second setting that brings the third hole into communication with the fourth hole via the second flow channel, liquid transfer through the third hole and the fourth hole is stopped by the check valve.
13. The connector according to
14. The connector according to
wherein a lever extended from the stopcock is formed on the stopcock, and
the lever is disposed in such a manner that:
when the stopcock is set to the first setting that brings the inner space of the tubular portion into communication with the first hole via the first flow channel, a leading end of the extended lever points to an external space side communicating with the first hole, and
when the stopcock is set to the second setting that brings the inner space of the tubular portion into communication with the second hole via the first flow channel, the leading end of the extended lever points to an external space side communicating with the second hole.
15. The connector according to
wherein a lever extended from the stopcock is formed on the stopcock, and the lever is disposed in such a manner that:
when the stopcock is set to the first setting that brings the inner space of the tubular portion into communication with the first hole via the first flow channel, a leading end of the extended lever points to an external space side communicating with the second hole, and
when the stopcock is set to the second setting that brings the inner space of the tubular portion into communication with the second hole via the first flow channel, the leading end of the extended lever points to an external space side communicating with the first hole.
16. The connector according to
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The present invention relates to a connector that is capable of switching flow channels, and particularly relates to a medical connector for transferring a liquid between, for example, a drug solution bag and a vial.
Drugs such as anticancer agents may be stored in the form of powder for storage stability and may be dissolved before use. In this case, a solvent is injected into a vial containing a drug, and a drug solution generated by dissolving the drug in the solvent is injected into a drug solution bag. Then, the drug solution in the drug solution bag is administered into the body via a tube attached to the drug solution bag. For example, the below-listed Patent Documents 1 and 2 propose devices for injecting a drug solution in the vial into the drug solution bag.
Patent Document 1 proposes that a mouth portion of a container (a vial) containing a drug is pierced with one end of a double-ended needle and a mouth portion of a container (a drug solution bag) containing a diluent is pierced with the other end of the double-ended needle, and in this state, a drug solution generated by dissolution in the drug-containing container is injected into the diluent-containing container. At this time, air is fed into the drug-containing container by supplying air with a syringe (an air supply means and drawing means) connected to the double-ended needle so that the drug solution is transferred quickly from the drug-containing container into the diluent-containing container.
Patent Document 2 proposes that a stopper of a glass bottle (a vial) is pierced with a bottle needle formed in a transfer device and a stopper of an empty bag (a drug solution bag) is pierced with a hollow needle, and in this state, a fluid contained in the glass bottle is transferred into the empty bag. At this time, external air is fed into the glass bottle by operating a pump provided in the transfer device so that the drug solution in the glass bottle can be transferred smoothly into the empty bag.
Patent Document 1: JP 2002-238979A
Patent Document 2: JP S56-95247U
Problem to be Solved by the Invention
However, the amount of drug solution to be injected into the drug solution bag differs from patient to patient, and there have been cases where it is necessary to adjust the amount of drug solution to be injected so as to be appropriate for individual patients. According to the devices proposed in Patent Documents 1 and 2, it was difficult to adjust the amount of drug solution to be injected, even though it was possible to transfer the drug solution from the vial into the drug solution bag quickly or smoothly. The reason for this is that with the devices proposed in Patent Documents 1 and 2, it is air, rather than the drug solution, that is fed by operation of the syringe or the pump. That is to say, although it is possible to accelerate transfer of the drug solution into the drug solution bag by feeding in air, the amount of drug solution to be injected varies depending on the pressure in the drug solution bag, and it was difficult to adjust the amount of drug solution to be injected with precision even when the amount of operation of the syringe or the pump is adjusted.
The present invention has been made to solve conventional problems such as those described above, and it is an object thereof to provide a connector that is capable of injecting a required amount of drug solution into a drug solution bag with precision.
Means for Solving Problem
In order to achieve the above-described object, a connector of the present invention is a connector including a connector main body provided with a tubular portion and a stopcock that is fitted in the tubular portion so as to be rotatable around an axis of the tubular portion, wherein one end of the tubular portion is sealed with the stopcock that is fitted in the tubular portion; a first flow channel and a second flow channel are formed in the stopcock; a first hole, a second hole, a third hole, and a fourth hole are formed in the connector main body; the first, the second, the third, and the fourth holes are holes that bring an inner space of the tubular portion into communication with an external space of the connector main body; and switching between a setting that brings the inner space of the tubular portion into communication with the first hole via the first flow channel and a setting that brings the inner space of the tubular portion into communication with the second hole via the first flow channel and brings the third hole into communication with the fourth hole via the second flow channel can be achieved by rotating the stopcock.
Effects of the Invention
With the connector of the present invention, it is possible to inject a required amount of drug solution into a drug solution bag with precision.
According to the present invention, when a syringe, a drug solution bag, and a vial are connected to the connector, it is possible to transfer a liquid between the vial and the drug solution bag via the syringe by switching between the flow channel settings within the connector, and it is also possible to adjust accurately the amount of the liquid to be transferred. Thus, a required amount of drug solution can be injected into the drug solution bag with precision.
In the connector of the present invention, it is preferable that a first connecting portion and a second connecting portion are provided in the connector main body; connecting ports are formed in the first and the second connecting portions; the first and the third holes are in communication with a space in the first connecting portion; and the second and the fourth holes are in communication with a space on the connecting port side of the second connecting portion. This configuration facilitates connection of the connector to the drug solution bag and the vial.
Moreover, it is preferable that the first flow channel is a recess formed in a side face of the stopcock, the recess extending to a leading end face of the stopcock and forming a notch in the leading end face of the stopcock. With this configuration, a flow channel can be formed between the recess and an inner circumferential surface of the tubular portion.
Moreover, it is preferable that both ends of the second flow channel are located at mutually different positions in an axial direction and in a circumferential direction of the stopcock. With this configuration, the state in which the ends of the second flow channel respectively communicate with the third hole and the fourth hole can be changed to the state in which the second flow channel is not interposed between the third hole and the fourth hole by rotating the stopcock. Thus, it is possible to switch between the state in which transfer between the third hole and the fourth hole is possible and the state in which transfer between the third hole and the fourth hole is not possible by rotating the stopcock.
Moreover, it is preferable that the second flow channel is a recess formed in a side face of the stopcock so as to have a spiral shape.
Moreover, it is preferable that the first flow channel is a hole that brings an opening formed on a leading end side of the stopcock into communication with an opening formed in a side face of the stopcock.
Moreover, it is preferable that the second flow channel is a penetrating flow channel that passes through the stopcock in a radial direction of the stopcock.
Moreover, it is preferable that a check valve is provided in at least one of the third hole and the fourth hole, and when the stopcock is set to the setting that brings the third hole into communication with the fourth hole via the second flow channel, liquid transfer through the third hole and the fourth hole is stopped by the check valve. With this configuration, when the syringe, the drug solution bag, and the vial are connected to the connector, it is possible to prevent a liquid from being transferred between the drug solution bag and the vial without passing through the syringe even in the case where the syringe is erroneously operated.
Moreover, it is preferable that the first connecting portion includes a lever lock that is integral with the connecting port formed in the first connecting portion. This configuration facilitates attachment and detachment of the first connecting portion.
Moreover, it is preferable that the second connecting portion has a protrusion protruding from an inner circumferential surface of the connecting port formed in the second connecting portion. With this configuration, it is possible to prevent the second connecting portion from falling off.
Moreover, it is preferable that the first connecting portion has a portion covered with a shield that can open and close by extension and retraction. With this configuration, leakage of the drug solution from the first connecting portion can be prevented even after the first connecting portion has been detached from the drug solution bag. Therefore, if the vial is disposed of in a state in which the second connecting portion and the vial remain in the connected state, leakage of the drug in the vial will be prevented.
Moreover, it is preferable that a graduated syringe including a cylinder and a movable piston is formed integrally on the other end side of the tubular portion. This configuration facilitates assembly of the connector prior to operation. Moreover, erroneous detachment of the syringe and resulting opening of the other end of the tubular portion can be prevented.
Moreover, it is preferable that a lever extended from the stopcock is formed on the stopcock, and the lever is disposed in such a manner that when the stopcock is set to the setting that brings the inner space of the tubular portion into communication with the first hole via the first flow channel, a leading end of the extended lever points to an external space side communicating with the first hole, and when the stopcock is set to the setting that brings the inner space of the tubular portion into communication with the second hole via the first flow channel, the leading end of the extended lever points to an external space side communicating with the second hole. With this configuration, it is possible to determine the status of the flow channel setting within the connector from the orientation of the lever.
Moreover, it is preferable that a lever extended from the stopcock is formed on the stopcock, and the lever is disposed in such a manner that when the stopcock is set to the setting that brings the inner space of the tubular portion into communication with the first hole via the first flow channel, a leading end of the extended lever points to an external space side communicating with the second hole, and when the stopcock is set to the setting that brings the inner space of the tubular portion into communication with the second hole via the first flow channel, the leading end of the extended lever points to an external space side communicating with the first hole. With this configuration, it is possible to determine the status of the flow channel setting within the connector from the orientation of the lever.
Moreover, it is preferable that a hydrophobic filter is provided in at least one of the third hole, the penetrating flow channel, and the fourth hole. With this configuration, when the syringe, the drug solution bag, and the vial are connected to the connector, liquid transfer between the drug solution bag and the vial via the third hole, the penetrating flow channel, and the fourth hole reliably can be prevented. This also renders accurate adjustment of the amount of liquid to be transferred between the vial and the drug solution bag via the syringe more reliable.
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
Embodiment 1
It should be noted that in the following description, the portion denoted by reference numeral 2 in
The first connecting portion 3 is integrally provided with a hollow cylindrical connecting port 11 and lever locks 12. The first connecting portion 3 is a connector for connecting the connector 1 to the drug solution bag 10 (
At this time, while lower portions of the lever locks 12 are bent in the direction of arrow “c”, claw portions 13 of the lever locks 12 engage an end face 41a (
The connector main body 2 includes an axial tubular portion 15 and a horizontal tubular portion 16 intersecting with each other. A thread 17 is formed on the horizontal tubular portion 16 for the purpose of screwing to the syringe 30 (
The connector 1, in a connected state as shown in
As described above, in
A needle-like portion 22 is formed on the back side of the connector main body 2. The needle-like portion 22 has a sharp tip, and a rubber stopper 23 (
The first connecting portion 3 has an upright tubular portion 25 formed in a central portion of the connecting port 11. A leading end portion of the upright tubular portion 25 pushes up a septum (a partition) 42 attached to the port portion 41. The septum 42 is made of a soft material, and a slit is formed therein. In the state shown in
The outer circumferential surface of the connecting tubular portion 21 of the first connecting portion 3 is fitted to the inner circumferential surface of the axial tubular portion 15 of the connector main body 2. Thus, the first connecting portion 3 is connected to the connector main body 2.
The stopcock 5 is inserted in the horizontal tubular portion 16 of the connector main body 2. One end of the horizontal tubular portion 16 is sealed with the stopcock 5, and an open portion 4 (
It should be noted that in the present embodiment, an example in which the first flow channel 33 is a flow channel having an L shape has been described. However, all that is required is that the opening 34 and the opening 35 are in communication with each other, and the shape of the flow channel is not limited to an L shape.
A first hole 37 and a second hole 43 are formed in the connector main body 2. These two holes are both holes that bring an inner space 16a of the horizontal tubular portion 16 into communication with an external space of the connector main body 2. The first hole 37 passes through a side wall portion of the horizontal tubular portion 16, and the second hole 43 passes through a base portion 18 and the needle-like portion 22.
Furthermore, a third hole 38 and a fourth hole 44 are formed in the connector main body 2. These two holes are also holes that bring the inner space 16a of the horizontal tubular portion 16 into communication with the external space of the connector main body 2 as is the case with the first hole 37 and the second hole 43. The third hole 38 passes through the side wall portion of the horizontal tubular portion 16, and the fourth hole 44 passes through the base portion 18 and the needle-like portion 22.
When the lever 8 is rotated, the stopcock 5 rotates around the axis of the horizontal tubular portion 16. Due to this rotation, the opening 34 rotationally moves in an outer circumferential direction of the stopcock 5.
In the state shown in
That is to say, by rotating the lever 8, it is possible to switch between a setting that brings the first flow channel 33 into communication with the second hole 43 and a setting that brings the first flow channel 33 into communication with the first hole 37. This switching between the settings can be used to transfer a solvent in the drug solution bag 10 into the vial 20 to generate a drug solution by dissolving a drug in powder form contained in the vial 20 in the solvent, and afterward to inject this drug solution into the drug solution bag 10. Details of this will be described later with reference to
The opening of the vial 20 is sealed with the rubber stopper 23 and a cap 24. The rubber stopper 23 is press-fitted in the opening of the vial 20. The cap 24 is formed by, for example, processing a sheet metal, and covers the opening of the vial 20. As shown in
Hereinafter, an operating procedure during injection of the drug in the vial 20 into the drug solution bag 10 will be described with reference to
When the stopcock 5 is in the setting shown in
In this case, an amount of the solvent corresponding to the amount by which the piston 31 is pulled is drawn into the syringe 30. Thus, the amount of the solvent to be drawn into the syringe 30 can be adjusted by adjusting the amount by which the piston 31 is pulled while looking at a scale on the cylinder 32. That is to say, a required amount of the solvent can be drawn into the syringe 30 with precision.
In the state shown in
The hydrophobic filter has air permeability and allows air, but not liquid, to pass through. Therefore, even when the pressure in the vial 20 is not positive, it is possible to prevent the solvent in the drug solution bag 10 from directly flowing into the vial 20.
In the state shown in
In this case, an amount of the solvent corresponding to the amount by which the piston 31 is pushed flows out of the syringe 30. Thus, the amount of the solvent to be caused to flow out of the syringe 30 can be adjusted by adjusting the amount by which the piston 31 is pushed while looking at the scale on the cylinder 32. That is to say, a required amount of the solvent can be injected into the vial 20 with precision.
During injection of the solvent into the vial 20, air in the vial 20 passes up through the fourth hole 44 and flows into the drug solution bag 10 via the connecting port 40. This also applies to the case where a hydrophobic filter is provided in the flow channel from the fourth hole 44 to the third hole 38 as described above. That is to say, the air permeability of the hydrophobic filter allows air in the vial 20 to flow into the drug solution bag 10.
Once the solvent is injected into the vial 20, the drug in powder form contained in the vial 20 is dissolved in the solvent. It is possible to accelerate the dissolution by shaking the vial 20.
As described above, when a hydrophobic filter is provided in the flow channel from the fourth hole 44 to the third hole 38, it is possible to prevent the drug solution in the vial 20 from directly flowing to the drug solution bag 10 via the connecting port 40 because the drug solution in the vial 20 does not pass through the hydrophobic filter.
When the stopcock 5 is in the setting shown in
In this case, an amount of the drug solution corresponding to the amount by which the piston 31 is pulled is drawn into the syringe 30. Therefore, the amount of the drug solution to be drawn into the syringe 30 can be adjusted by adjusting the amount by which the piston 31 is pulled while looking at the scale on the cylinder 32. That is to say, a required amount of the drug solution can be drawn into the syringe 30 with precision.
In the state shown in
In this case, an amount of the drug solution corresponding to the amount by which the piston 31 is pushed is injected into the drug solution bag 10. Therefore, the amount of the drug solution to be injected into the drug solution bag 10 can be adjusted by adjusting the amount by which the piston 31 is pushed while looking at the scale on the cylinder 32. That is to say, a required amount of the drug solution can be injected into the drug solution bag 10 with precision.
A required amount of the drug solution can be injected into the drug solution bag 10 through the process as described above. The drug solution in the drug solution bag 10 will be administered into the body via a tube with a needle with which a port portion 60 (
In the present embodiment, an example in which the syringe 30 (
Moreover, in the present embodiment, as shown in
Specifically, in
In
That is to say, with the stopcock 5 equipped with the lever 8 according to the present embodiment, it is possible to readily determine which of the drug solution bag 10 side and the vial 20 side the connector 1 enables transfer to/from by observing the orientation of the leading end 8a of the lever 8.
Moreover, the orientation of the leading end 8a of the lever 8 may be reversed from that of the example shown in
Next, a structure for connecting the first connecting portion 3 to the drug solution bag 10 will be described with reference to
The first connecting portion 3 shown in
Here, in
In the state shown in
A leading end portion of the upright tubular portion 25 extending outside the shield 26 pushes up the septum 42 attached to the port portion 41 and thus forces the slit 45 (
Next, after a required amount of the drug solution has been injected into the drug solution bag 10, the first connecting portion 3 that is integral with the vial 20 is to be detached from the port portion 41. During detachment, in
The first connecting portion 3 returns to the state shown in
It should be noted that, in
Moreover, the first connecting portion 3 of the present embodiment is merely an example, and various types of connecting systems can be employed. Furthermore, although an example in which the first connecting portion 3 and the connector main body 2 are configured as separate components has been described, a configuration in which the first connecting portion 3 and the connector main body 2 are integrally molded is conceivable depending on the structure of the first connecting portion 3.
Next, a structure for connecting the second connecting portion 6 to the vial 20 will be described with reference to
An opening 50 is formed in a central portion of the cap 24. Thus, the rubber stopper 23 is exposed at the position of the opening 50.
A protrusion 46 protruding from an inner circumferential surface of the connecting port 49 is formed in the connecting port 49 of the second connecting portion 6. An expanded-diameter portion 47 is formed on the opening side of the vial 20. As will be described later by means of
In
Moreover, unlike the first connecting portion 3, the second connecting portion 6 is not provided with a mechanism that facilitates disconnection, such as the lever locks 12. For this reason, once the second connecting portion 6 is firmly fitted to the vial 20, the second connecting portion 6 can be prevented from readily falling off the vial 20. Thus, leakage of the drug solution due to easy detachment of the vial 20 can be prevented.
Moreover, after the first connecting portion 3 has been detached from the drug solution bag 10, as shown in
Thus, if the vial 20 is disposed of in a state in which the first connecting portion 3 has been detached from the drug solution bag 10 and the second connecting portion 6 and the vial 20 remain in the connected state, leakage of the drug in the vial 20 is prevented.
The drug leakage preventing structure as described above is particularly effective in the case where the drug in the vial 20 is a highly toxic drug such as an anticancer agent.
It should be noted that the second connecting portion 6 of the present embodiment is merely an example, and various types of connecting systems can be employed. Moreover, although the second connecting portion 6 is formed integrally with the connector main body 2, the second connecting portion 6 may be configured as a component separate from the connector main body 2 as long as a structure that prevents the second connecting portion 6 from readily falling off the connector main body 2 can be achieved.
Embodiment 2
Hereinafter, a connector according to Embodiment 2 of the present invention will be described with reference to the drawings. The portions having the same configuration as those of Embodiment 1 are denoted by the same reference numerals, and detailed descriptions thereof are omitted.
It should be noted that in the following description, the portion denoted by reference numeral 101 in
The first connecting portion 3 is a connector for connecting the connector 100 to the drug solution bag 10 (
The connector main body 101 includes an axial tubular portion 51 and a horizontal tubular portion 52 intersecting with each other. A thread 53 is formed on the horizontal tubular portion 52 for the purpose of screwing to the syringe 30 (
The connector 100, in a connected state as shown in
As described above, in
A needle-like portion 80 is formed on the back side of the connector main body 101. The needle-like portion 80 has a sharp tip, and the rubber stopper 23 (
As shown in
The ends of the second flow channel 73 are located at mutually different positions both in an axial direction and in a circumferential direction of the stopcock 70, as shown in
The outer circumferential surface of the connecting tubular portion 54 of the first connecting portion 3 is fitted to the inner circumferential surface of the axial tubular portion 51 of the connector main body 101. Thus, the first connecting portion 3 is connected to the connector main body 101.
The stopcock 70 is inserted in the horizontal tubular portion 52 of the connector main body 101. One end of the horizontal tubular portion 52 is sealed with the stopcock 70, and an open portion 57 (
A first hole 58 and a second hole 59 are formed in the connector main body 101. These two holes are both holes that bring an inner space 52a of the horizontal tubular portion 52 into communication with an external space of the connector main body 101. The first hole 58 passes through a side wall portion of the horizontal tubular portion 52, and the second hole 59 passes through a base portion 63 and the needle-like portion 80.
Furthermore, a third hole 60 and a fourth hole 61 are formed in the connector main body 101. These two holes are also holes that bring the inner space 52a of the horizontal tubular portion 52 into communication with the external space of the connector main body 101 as is the case with the first hole 58 and the second hole 59. The third hole 60 passes through the side wall portion of the horizontal tubular portion 52, and the fourth hole 61 passes through the base portion 63 and the needle-like portion 80.
A check valve 64 is provided in the third hole 60. The check valve 64 includes a ball 65, an inclined surface 66, and an inclined surface 68 that is formed in a cap 67. In the state shown in
On the other hand, when the connector is inverted from the state shown in
Therefore, with the check valve 64, liquid transfer through both of the third hole 60 and the fourth hole 61 is stopped even in the setting that brings the third hole 60 into communication with the fourth hole 61 via the second flow channel 73. Thus, in the case where the syringe 30 is erroneously operated, the liquid is prevented from directly going into the drug solution bag 10 or the vial 20 without passing through the syringe 30. Details of this will be described later with reference to
Although not illustrated in
In the state shown in
By rotating the lever 71 (
Hereinafter, an operating procedure during injection of the drug in the vial 20 into the drug solution bag 10 will be described with reference to
When the stopcock 70 is in the setting shown in
In this case, an amount of the solvent corresponding to the amount by which the piston 31 is pulled is drawn into the syringe 30. Therefore, the amount of the solvent to be drawn into the syringe 30 can be adjusted by adjusting the amount by which the piston 31 is pulled while looking at the scale on the cylinder 32. That is to say, a required amount of the solvent can be drawn into the syringe 30 with precision.
On the other hand, in the state shown in
Moreover, due to the rotation of the stopcock 70, the second flow channel 73 that is integral with the stopcock 70 also moves rotationally. In
In the state shown in
In this case, an amount of the solvent corresponding to the amount by which the piston 31 is pushed flows out of the syringe 30. Thus, the amount of the solvent to be caused to flow out of the syringe 30 can be adjusted by adjusting the amount by which the piston 31 is pushed while looking at the scale on the cylinder 32. That is to say, a required amount of the solvent can be injected into the vial 20 with precision.
During injection of the solvent into the vial 20, air in the vial 20 passes up through the fourth hole 61 and flows into the drug solution bag 10 via the second flow channel 73, the third hole 60, and the inner space 56 of the upright tubular portion 55. The air that has flowed into the third hole 60 pushes up the ball 65, so that the air can flow from the third hole 60 toward the upright tubular portion 55 side.
Here, in the state shown in
On the other hand, in the state shown in
That is to say, the check valve 64 that is provided in the third hole 60 prevents the solvent from directly flowing into the vial 20 without passing through the syringe 30 even in the case where the syringe 30 is operated erroneously.
When the stopcock 70 is in the setting shown in
In this case, an amount of the drug solution corresponding to the amount by which the piston 31 is pulled is drawn into the syringe 30. Therefore, the amount of the drug solution to be drawn into the syringe 30 can be adjusted by adjusting the amount by which the piston 31 is pulled while looking at the scale on the cylinder 32. That is to say, a required amount of the drug solution can be drawn into the syringe 30 with precision.
During drawing of the drug solution contained in the vial 20 into the syringe 30, air in the drug solution bag 10 passes up through the third hole 60 and flows into the vial 20 via the second flow channel 73 and the fourth hole 61. The air that has flowed into the third hole 60 pushes up the ball 65, so that the air can flow from the third hole 60 toward the second flow channel 73 side.
Here, in the state shown in
On the other hand, in the state shown in
That is to say, the check valve 64 that is provided in the third hole 60 prevents the drug solution from directly flowing into the drug solution bag 10 without passing through the syringe 30 even in the case where the syringe 30 is erroneously operated.
In the state shown in
In this case, an amount of the drug solution corresponding to the amount by which the piston 31 is pushed is injected into the drug solution bag 10. Therefore, the amount of the drug solution to be injected into the drug solution bag 10 can be adjusted by adjusting the amount by which the piston 31 is pushed while looking at the scale on the cylinder 32. That is to say, a required amount of the drug solution can be injected into the drug solution bag 10 with precision.
A required amount of the drug solution can be injected into the drug solution bag 10 through the process as described above. The drug solution in the drug solution bag 10 will be administered into the body via a tube with a needle with which the port portion 60 (
In the present embodiment, an example in which the syringe 30 (
Moreover, in the present embodiment, as shown in
Specifically, in
In
Therefore, it is possible to determine readily which of the drug solution bag 10 side and the vial 20 side the connector 100 stops liquid transfer to/from by observing the orientation of the leading end 71a of the lever 71.
Moreover, the orientation of the leading end 71a of the lever 71 may be reversed from that of the example shown in
Moreover, in Embodiments 1 and 2, two types of the first and second flow channels formed in the stopcock have been described. However, one of the first flow channel and the second flow channel of Embodiment 1 may be replaced with the flow channel of Embodiment 2. Also, one of the first flow channel and the second flow channel of Embodiment 2 may be replaced with the flow channel of Embodiment 1. For example, although the first flow channel 33 of Embodiment 1 is described as an L-shaped flow channel, this L-shaped flow channel may be replaced with a groove-like flow channel like the first flow channel 72 of Embodiment 2.
Moreover, in the present embodiment, an example in which the check valve 64 includes the ball 65, the inclined surface 66, and the inclined surface 68 has been described. However, other structures may be employed. Furthermore, although an example in which the check valve 64 is provided in the third hole 60 has been described, the check valve can be provided in at least one of the third hole 60 and the fourth hole 61. For example, it is possible to provide the check valve in the fourth hole 61 when the fourth hole 61 has a larger diameter and a smaller check valve is used.
Industrial Applicability
As described above, the connector according to the present invention is capable of injecting a required amount of drug solution into a drug solution bag with precision and, therefore, is useful as, in particular, a medical connector that can be interposed between a drug solution bag and a vial to inject a pharmaceutical preparation in the vial into the drug solution bag.
1, 100 connector
2, 101 connector main body
3 first connecting portion
4, 57 open portion
5, 70 stopcock
8, 71 lever
8a, 71a leading end of lever
11, 49 connecting port
12 lever lock
16, 52 horizontal tubular portion (tubular portion)
25, 55 upright tubular portion
26 shield
30 syringe
31 piston
32 cylinder
33, 72 first flow channel
34, 35 opening
36, 73 second flow channel
37, 58 first hole
38, 60 third hole
39 hydrophobic filter
43, 59 second hole
44, 61 fourth hole
46 protrusion
64 check valve
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