JP5870018B2 - Pre-filled syringe chemical recovery tool and pre-filled syringe with chemical recovery function - Google Patents

Description

  The present invention relates to a pre-filled syringe for a pre-filled syringe in which a pre-filled syringe is pre-filled with a chemical solution and a pre-filled syringe with a chemical solution collecting function. More specifically, the present invention relates to a chemical solution recovery tool for a prefilled syringe and a prefilled syringe with a chemical solution recovery function for recovering a chemical solution pushed out from a syringe before medication.

  Conventionally, a prefilled syringe in which a drug solution to be administered to a patient is enclosed is provided (see, for example, Patent Document 1).

  Such a prefilled syringe includes a syringe (syringe). The syringe is a cylindrical cylinder having a first end and a second end opposite to the first end, and constitutes a flow path for a chemical solution when administering a drug to a patient or a flow channel for a chemical solution when co-injecting a chemical solution. A cylindrical cylinder having a cylinder tip portion at a first end to which a chemical solution distribution member (for example, a syringe needle or a tube for infusion or mixed injection) is fluidly connected, and a second end of the cylinder are inserted into the cylinder. And a piston provided so as to be movable in the axial direction of the cylinder.

  In such a prefilled syringe, a predetermined amount of chemical solution is placed in the internal space of the cylinder between the piston and the cylinder tip. In connection with this, a prefilled syringe is provided with the cap which closes the distribution route of the chemical | medical solution in the chemical | drug | medicine distribution | circulation member (mainly injection needle) connected to the cylindrical tip part or this cylindrical tip part of a syringe.

  As a result, prefilled syringes are stored in a state where a predetermined amount of drug solution is pre-enclosed, and are prevailing as being able to be administered immediately when necessary without filling the syringe with the drug solution in the medical field.

JP 2012-45203 A

  By the way, although the chemical | medical solution is enclosed with the syringe in a prefilled syringe as mentioned above, normally gas (mainly air) remains in the internal space of a syringe. Along with this, a user (physician or nurse) of the prefilled syringe pushes the piston together with a minimum amount of drug solution by pushing the piston before medication.

  In addition, since a predetermined amount of drug solution is sealed in the syringe of the prefilled syringe, the dose of the drug solution to the patient may need to be adjusted when the prefilled syringe is used for medication. In this case, the user (physician or nurse) of the prefilled syringe pushes the piston before dosing and pushes out unnecessary chemical liquid to the outside from the tube tip portion or the drug solution distribution member connected to the tube tip portion.

  Therefore, chemicals pushed out from the tube tip etc. before medication may splash around, and depending on the type of chemicals, the surrounding environment cannot be kept hygienic or the health of the user may be impaired. Sometimes it becomes.

  Then, this invention makes it a subject to provide the prefilled syringe with the chemical | medical solution collection | recovery function and the chemical | medical solution collection | recovery tool for prefilled syringes which can collect | recover the chemical | medical solution discharged | emitted prior to a medication, without splashing around.

  A chemical recovery tool for a prefilled syringe according to the present invention has a second end opposite to the first end, a cylindrical cylinder having a cylinder tip at the first end, and the cylinder from the second end of the cylinder. And a syringe provided with a piston provided so as to be movable in the axial direction of the cylinder, and a syringe in which a predetermined amount of drug solution is placed in the internal space of the cylinder between the piston and the cylinder tip A chemical solution collecting device for a prefilled syringe including a chemical solution recovery unit configured to be able to contain a chemical solution, and a chemical solution flow channel when administering a drug solution to a patient or a chemical solution flow channel when mixing a chemical solution The first flow path that is fluidly connected to the constituting chemical liquid circulation member, the second flow path that is fluidly connected to the chemical liquid recovery part, and the third flow path that is fluidly connected to the tube tip part are joined together. Flow path shape formed in the state And a channel that allows the first channel and the third channel to communicate with each other while the second channel is blocked and the second channel and the third channel communicate with each other. And a switching structure.

  In the chemical solution recovery tool for prefilled syringes configured as described above, a chemical solution distribution member such as an injection needle, a drip tube or a mixed injection tube, a chemical solution recovery part, and a syringe tip are connected to the flow path forming part. As a result, the chemical liquid circulation member is fluidly connected to the first flow path, the second flow path is fluidly connected to the chemical liquid recovery section, and the third flow path is fluidly connected to the cylinder tip of the syringe.

  When the second flow path and the third flow path are communicated in a state where the flow path switching structure blocks the first flow path, the syringe and the chemical recovery unit communicate with each other via the second flow path and the third flow path. To do. Therefore, by pressing the piston in this state, an unnecessary amount of the chemical solution or the chemical solution discharged together with the gas remaining in the syringe is sent to the chemical solution recovery unit and collected.

  Thereafter, when the first flow path and the third flow path are communicated with the flow path switching structure blocking the second flow path, the syringe and the chemical solution distribution member communicate with each other via the first flow path and the third flow path. . Therefore, by pressing the piston in this state, the drug solution in the syringe is sent to the drug solution distribution member, and the patient is dosed and mixed with the drug solution.

  Thus, according to the chemical solution recovery tool for a prefilled syringe having the above-described configuration, the chemical solution is collected in the chemical solution collection unit without being scattered around before the medication. As a result, the surrounding environment can be kept hygienic in the medical field, and the health of the user (doctor or nurse) can be prevented. In addition, if the drug solution is pushed out more than necessary before medication, the drug solution in the syringe will be less than the amount required for medication, but the flow path switching structure allows the drug solution to flow from the second channel to the third channel. If the chemical liquid is allowed to flow from the third flow path to the second flow path, the chemical liquid recovered in the chemical liquid recovery unit is returned to the cylinder in a sanitary state without mixing in foreign matter. be able to. Therefore, even if a separate prefilled syringe is not prepared to make up for the shortage, the amount of the chemical solution in the cylinder can be adjusted to an amount necessary for medication.

  As one aspect of the present invention, the flow path switching structure is a first valve mechanism provided on the first flow path, the first valve mechanism capable of opening and closing the first flow path, and a first valve mechanism provided on the second flow path. And a second valve mechanism capable of opening and closing the second flow path. In this way, by combining the opening / closing operation of the first flow path by the first valve mechanism and the opening / closing operation of the second flow path by the second valve mechanism, the second flow path and the first flow path are blocked while blocking the first flow path. It is possible to switch between a state in which the three flow paths are in communication and a state in which the first flow path and the third flow path are in communication while blocking the second flow path.

  In this case, it is preferable that the first valve mechanism is configured to open with the connection of the chemical solution distribution member. In this way, since the first valve mechanism is opened simply by connecting the chemical solution distribution member, there is no need to perform an open / close operation on the first valve mechanism independently, and a quick medical operation is required. Is optimal.

  More specifically, the flow path forming portion is a connector provided on the chemical flow member, and has a connected portion connectable to a connector having a shaft-like portion inserted into the first flow path, It is preferable that the one-valve mechanism has a valve body that is pressed by the shaft-shaped portion in a state where the connector is connected to the connected portion and opens. According to such a configuration, the valve body of the first valve mechanism normally blocks the first flow path. And if the connector of a chemical | medical solution distribution member is connected to a flow-path formation part (to-be-connected part), the axial part of a connector will press a valve body. Along with this, the valve element moves from a position where the first flow path is blocked to a position where the first flow path is opened. Accordingly, the first flow path is automatically opened in conjunction with the connection of the chemical solution distribution member.

  Further, when the flow path switching structure includes the first valve mechanism and the second valve mechanism, the second valve mechanism is a cylindrical exterior body that forms part of the second flow path, and is elastically deformed in the radial direction. The outer body is provided with a spherical valve embedded in the outer body, and the inner surface of the outer body and the outer periphery of the spherical valve are in close contact with each other to block the second flow path, while the outer body is in the radial direction. When pressed, a flow path may be formed between the spherical valve and the exterior body. According to such a configuration, since the exterior body is configured to be elastically deformable in the radial direction, the exterior body deforms into a flat shape when pressed in the radial direction, and returns to its original state (cylinder when the press is released). To the state). Therefore, when the exterior body is pressed, a gap is formed between the spherical valve and the exterior body due to the deformation of the exterior body, and the gap communicates the third flow path and the chemical recovery part (second flow). Part of the road). On the other hand, when the pressure on the exterior body is released, the exterior body is restored and brought into close contact with the spherical valve, and the second flow path is blocked. Therefore, since the second valve mechanism normally shuts off the second flow path, it prevents the first flow path and the third flow path from being forgotten to block the second flow path. can do.

  As another aspect of the present invention, the first flow path, the second flow path, and the third flow path are formed so as to merge at one place, and the flow path switching structure includes the first flow path, the second flow path, and the first flow path. A three-way valve provided at the joining position of the three flow paths can be used. In this way, by operating the single three-way valve, the state where the second flow path and the third flow path are communicated while blocking the first flow path, and the first flow path while blocking the second flow path. And a state in which the third flow path is in communication with each other.

  The prefilled syringe with a chemical solution recovery function according to the present invention has a first end and a second end opposite to the first end, a cylindrical cylinder having a cylinder tip at the first end, and a second end of the cylinder to the cylinder. A syringe having a piston inserted therein and movably provided in an axial direction of the cylinder, wherein a predetermined amount of chemical solution is placed in an internal space of the cylinder between the piston and the cylinder tip; And any one of the above-described chemical liquid collecting tools.

  According to the prefilled syringe with the chemical solution recovery function having the above-described configuration, since any one of the chemical solution recovery tools is provided, the above-described functions and effects can be obtained. In addition, the pre-filled syringe with a chemical | medical solution collection | recovery tool and chemical | medical solution collection | recovery function for prefilled syringes of this invention can also be sterilized suitably by a well-known sterilization method.

  As described above, according to the present invention, it is possible to achieve an excellent effect that the drug solution discharged prior to medication can be collected without being scattered around.

FIG. 1 is an overall cross-sectional view of a prefilled syringe with a chemical solution recovery function according to the first embodiment of the present invention, in which a chemical solution distribution member is not connected and a first valve mechanism blocks a first flow path. is there. FIG. 2 is an enlarged cross-sectional view including a first valve mechanism employed in the prefilled syringe with a chemical solution recovery function according to the first embodiment and a connector for opening the first valve mechanism, where the first valve mechanism is the first flow It is an expanded sectional view of the state where the road was intercepted. FIG. 3 is an enlarged cross-sectional view including a first valve mechanism employed in the prefilled syringe with a chemical solution recovery function according to the first embodiment and a connector for opening the first valve mechanism, and the connector is used as a flow path forming unit. It is an expanded sectional view of the state where it connected and opened the 1st valve mechanism. FIG. 4 is an enlarged cross-sectional view including a second valve mechanism employed in the prefilled syringe with a chemical solution recovery function according to the first embodiment, and is an enlarged cross-sectional view in a state where the second valve mechanism blocks the second flow path. It is. 5A is an enlarged cross-sectional view of a state in which a second valve mechanism employed in the prefilled syringe with a chemical solution recovery function according to the first embodiment is opened, and FIG. 5B is a cross-sectional view taken along the line II of FIG. 5A. is there. FIG. 6 is a cross-sectional view for explaining the operation of the prefilled syringe with a chemical solution recovery function according to the first embodiment, and FIG. 6A shows that the chemical solution distribution member is not connected and the first valve mechanism blocks the first flow path. FIG. 6B is a cross-sectional view of the state in which the second valve mechanism opens the second flow path, and FIG. 6B shows a state in which the chemical valve member is connected to the flow path forming portion and the first valve mechanism opens the first flow path. FIG. 6 is a cross-sectional view of a state where the second valve mechanism blocks the second flow path. FIG. 7 is an overall cross-sectional view of the prefilled syringe with a chemical solution recovery function according to the second embodiment of the present invention, and is a cross-sectional view in a state where a three-way valve that is a flow path switching structure blocks a third flow path. FIG. 8 is a cross-sectional view for explaining the operation of the prefilled syringe with a chemical solution recovery function according to the second embodiment. FIG. 8A shows a flow path switching structure (three-way valve) while blocking the first flow path. FIG. 8B is a cross-sectional view of a state in which the second flow path and the third flow path are communicated, and FIG. 8B illustrates the first flow path and the third flow while the flow path switching structure (three-way valve) blocks the second flow path. It is sectional drawing of the state which connected the path | route. FIG. 9 is an overall cross-sectional view of the prefilled syringe with a chemical solution recovery function according to the third embodiment of the present invention, in which the first valve mechanism blocks the first flow path and the second valve mechanism blocks the second flow path. It is sectional drawing of the state which carried out. FIG. 10 is a cross-sectional view for explaining the action of the prefilled syringe with a chemical solution recovery function according to the third embodiment. FIG. 10A shows the second valve mechanism while the first valve mechanism blocks the first flow path. FIG. 10B is a cross-sectional view of a state where the first valve mechanism opens the first flow path while the second valve mechanism blocks the second flow path. .

  Hereinafter, a first embodiment of the present invention will be described with reference to the accompanying drawings.

  As shown in FIG. 1, a prefilled syringe with a chemical solution recovery function according to the present embodiment (hereinafter simply referred to as a prefilled syringe) has a first end and a second end opposite to the first end, and a tube tip portion 20a at the first end. A syringe 2 having a cylindrical cylinder 20 and a piston 21 which is inserted into the cylinder 20 from the second end of the cylinder 20 and is movable in the axial direction of the cylinder 20. A syringe 2 in which a predetermined amount of the chemical M is placed in the internal space of the cylinder 20 between the cylinder tip 20a and the chemical recovery tool 3 connected to the cylinder tip 20a of the cylinder 20.

  The chemical solution recovery tool 3 includes a chemical solution recovery unit 30 configured to store the chemical solution M, and a chemical solution distribution member that constitutes a chemical solution flow channel for administering a drug to a patient or a chemical solution flow channel for co-injecting a chemical solution. 4, a first flow path R1 fluidly connected to 4, a second flow path R2 fluidly connected to the chemical recovery unit 30, and a third flow path R3 fluidly connected to the tube tip 20 a are joined together. The second flow path R2 and the third flow path R3 are communicated with the flow path forming portion 31 formed in the closed state, while the first flow path R1 is blocked, while the second flow path R2 is blocked. And a flow path switching structure 32 that allows the one flow path R1 and the third flow path R3 to communicate with each other.

  The chemical solution recovery unit 30 may employ a container that can store the chemical solution M. In the chemical liquid recovery unit 30 according to the present embodiment, the outer peripheral ends of two superimposed sheets (not numbered) are connected (for example, heat sealed), and the chemical liquid M is accommodated between the two sheets. A bag-like container having a space is employed.

  The flow path forming unit 31 according to the present embodiment extends from a cylindrical main body part 310 that continuously forms the first flow path R1 and the third flow path R3, and an intermediate position in the axial direction of the main body part 310. The branch part 311 is a branch part 311 formed in a state where the second flow path R2 is connected to the connection position of the first flow path R1 and the third flow path R3.

  The main body 310 continuously forms the first flow path R1 and the third flow path R3 as described above. That is, in the present embodiment, a half region on one end side of the main body 310 forms the first flow path R1, and a half region on the other end side of the main body 310 forms the third flow path R3.

  Then, a connected portion (hereinafter referred to as a first connected portion) 310 a for fluidly connecting the chemical solution circulation member 4 is provided at one end portion of the main body portion 310, and the other end portion of the main body portion 310 is provided at the other end portion. A connected portion (hereinafter referred to as a third connected portion) 310b that is fluidly connected to the tube tip portion 20a of the syringe 2 (cylinder 20) is provided.

  In this embodiment, the 1st to-be-connected part 310a is the connector 40 provided in the chemical | medical solution distribution | circulation member 4, Comprising: It is comprised so that connection with the connector 40 which has the axial part 41 inserted in 1st flow path R1 is possible. ing.

  Here, the 1st to-be-connected part 310a including the chemical | medical solution distribution member 4 is demonstrated concretely. The medicinal solution distribution member 4 forms a flow path for passing medicinal solution when a patient is medicated or mixed with a medicinal solution, and means, for example, an injection needle or a drip or mixed injection tube. . The chemical solution distribution member 4 according to this embodiment includes a tube C for infusion or mixed injection and a connector 40 for connecting the tube C to the prefilled syringe 1 (syringe 2).

  As shown in FIGS. 2 and 3, the connector 40 has a first end and a second end opposite to the first end, and a first connection portion 42 for connecting a tube C for infusion or mixed injection to the first end. On the other hand, a second connection portion 43 for connecting the first connected portion 310a to the second end portion is provided. The first connection portion 42 has a cylindrical shape and is set to an outer diameter that allows the tube C to be fitted. The 2nd connection part 43 is formed in the cylinder shape, and the external thread (not numbered) is formed on the outer periphery.

  The shaft-like portion 41 of the connector 40 is disposed in the second connection portion 43 so as to be concentric with the second connection portion 43. The shaft portion 41 is formed in a hollow shaft shape, and the internal space communicates with the hole of the first connection portion 42. In addition, the front-end | tip of the shaft-shaped part 41 which concerns on this embodiment is sealed. Along with this, a hole (not numbered) penetrating in the direction perpendicular to the axial direction of the shaft-like portion 41 is provided at the tip portion of the shaft-like portion 41.

  In this embodiment, the 1st to-be-connected part 310a is formed in a cylinder shape, and the internal thread which can be screwed together with the external thread provided in the 2nd connection part 43 of the connector 40 is formed on the inner periphery. As a result, the second connecting portion 43 of the connector 40 is screwed into the first connected portion 310a, so that the shaft-like portion 41 becomes the center of the first connected portion 310a (the valve body of the first valve mechanism 33 described later). 330 (position corresponding to 330).

  Returning to FIG. 1, in the present embodiment, the second flow path R <b> 2 is formed by the entire branch portion 311. The branch part 311 according to the present embodiment includes a straight part 312 extending in a direction orthogonal to the main body part 310 and an inclined part 313 inclined to the syringe 2 side with respect to the straight part 312. In the present embodiment, the straight portion 312 is a first straight portion 312a having a first end and a second end, the first straight portion 312a having the first end connected to the body portion 310, and the first end. A second straight portion 312b having a second end and a second straight portion 312b having a first end connected to the inclined portion 313, a second end of the first straight portion 312a, and a second straight portion 312b. It is comprised by the 2nd valve mechanism 34 (exterior body 340 mentioned later) connected to the 2nd end mentioned later.

  Each of the straight part 312 and the inclination part 313 is made into the cylinder shape, and has mutually continued internal space. Thereby, the straight part 312 and the inclination part 313 of the branch part 311 have demarcated 2nd flow path R2. In the present embodiment, the distal end side of the branch part 311 (the distal end side of the inclined part 313) is sealed to the chemical solution recovery part 30.

  Specifically, a connected portion (hereinafter referred to as a second connected portion) 311a to which the chemical solution recovery unit 30 is connected is provided at the distal end portion (the distal end portion of the inclined portion 313) of the branch portion 311 according to the present embodiment. Is provided. And as above-mentioned, as the chemical | medical solution collection | recovery part 30 is formed in a bag shape by connecting two films, the 2nd to-be-connected part 311a of the inclination part 313 is two sheets which comprise the chemical | medical solution collection | recovery part 30 And is welded to the chemical recovery unit 30 (film). Accordingly, the second flow path R2 communicates with the internal space of the chemical solution recovery unit 30.

  The flow path switching structure 32 is a first valve mechanism 33 provided on the first flow path R1, and is provided on the first valve mechanism 33 capable of opening and closing the first flow path R1 and the second flow path R2. The second valve mechanism 34 includes a second valve mechanism 34 that can open and close the second flow path R2.

  In the present embodiment, the first valve mechanism 33 is configured to open with the connection of the chemical solution circulation member 4 to open the first flow path R1. As described above, the connector 40 connected to the first connected portion 310a has the shaft-like portion 41 inserted into the center of the first connected portion 310a. Accordingly, the first valve mechanism 33 according to the present embodiment includes a valve body 330 disposed at the center position of the first connected portion 310a.

  This will be described more specifically. As shown in FIGS. 2 and 3, the first valve mechanism 33 has a first end and a second end, and the first valve mechanism 33 is connected to the flow path forming portion 31 in the first connected portion 310 a. A cylindrical valve body housing portion 331 disposed concentrically with the valve body housing portion 331 having an annular valve seat portion 331a at the second end, and concentrically housed in the valve body housing portion 331. It is the valve body 330, Comprising: The valve body 330 provided so that the movement to the axial direction of the valve body accommodating part 331 was provided, and the urging member 332 which urges | biases the valve body 330 toward the valve seat part 331a.

  In the present embodiment, the first valve mechanism 33 is configured integrally with the flow path forming unit 31. Accordingly, the valve body accommodating portion 331 has the first end (valve seat portion 331a) positioned on the connector 40 side and the flow passage forming portion 31 (main body portion) in a state where the inside communicates with the third flow passage R3. 310). Thereby, the internal space of the valve body accommodating part 331 comprises a part of 1st flow path R1.

  As shown in FIG. 2, the first valve mechanism 33 normally presses the valve body 330 against the valve seat portion 331 a by the urging force of the urging member 332, and the first end (valve seat) of the valve body housing portion 331. The hole defined by the portion 331a is closed. As shown in FIG. 3, in the first valve mechanism 33, when the connector 40 (second connection portion 43) is screwed to the first connected portion 310a, the shaft-like portion 41 defines the valve seat portion 331a. The valve body 330 is pressed in a direction away from the valve seat portion 331a by the shaft-like portion 41.

  As a result, the valve body 330 that has closed the inside of the valve body housing portion 331 (the valve body 330 that has blocked the first flow path R1) is separated (opened) from the valve seat portion 331a. The distal end portion of the shaft-shaped portion 41 enters the valve body housing portion 331, and the inside of the valve body housing portion 331 communicating with the third flow path R3 and the interior of the shaft-shaped portion 41 communicate (the first flow path R1 is Open).

  On the other hand, as shown in FIGS. 4 and 5, the second valve mechanism 34 is a cylindrical exterior body 340 that forms a part of the second flow path R <b> 2 and can be elastically deformed in the radial direction. 340 and a spherical valve 341 installed in the exterior body 340. The second valve mechanism 34 is normally spherical when the outer peripheral body 340 is pressed in the radial direction while the inner peripheral surface of the outer casing 340 and the outer periphery of the spherical valve 341 are in close contact with each other to block the second flow path R2. A flow path is formed between the valve 341 and the exterior body 340.

  This will be described more specifically. The exterior body 340 is formed of an elastic material such as silicon rubber. The exterior body 340 is formed in a cylindrical shape and has a first end and a second end in the axial direction.

  As the exterior body 340 is formed in a cylindrical shape, a through hole H is formed in the exterior body 340. The through hole H of the exterior body 340 includes an enlarged hole portion Ha that accommodates the spherical valve 341, and a pair of small diameter holes Hb and Hc that are continuously formed on both sides of the enlarged hole portion Ha. Is provided.

  The inner diameter of the enlarged hole portion Ha is set to the same diameter as the spherical valve 341 or smaller than the spherical valve 341. Further, the length of the enlarged hole portion Ha in the axial direction of the exterior body 340 is set longer than the outer diameter of the spherical valve 341. Thereby, the spherical valve 341 in the enlarged hole portion Ha is normally in close contact with the inner peripheral surface (the inner peripheral surface defining the enlarged hole portion Ha) of the exterior body 340, as shown in FIG.

  The second end of the first straight portion 312a is fitted into one small-diameter hole Hb of the exterior body 340, and the second end of the second straight portion 312b is fitted into the other small-diameter hole Hc of the exterior body 340. The end is fitted. As a result, the second valve mechanism 34 is interposed in the middle of the branch portion 311. That is, the second valve mechanism 34 is interposed between the first straight portion 312 a and the second straight portion 312 b and constitutes a part of the straight portion 312 in the branch portion 311. Along with this, the enlarged hole portion Ha constitutes a part of the second flow path R2.

  And since the exterior body 340 is shape | molded with the elastic material as mentioned above, when it presses to radial direction as shown to FIG. 5A, it elastically deforms centering on the press position. Accordingly, when the position corresponding to the spherical valve 341 in the enlarged hole portion Ha in the exterior body 340 is pressed, the exterior body 340 is elastically deformed while extending in the circumferential direction.

  As a result, as shown in FIG. 5B, when the exterior body 340 is pressed, the second valve mechanism 34 partially separates the exterior body 340 from the spherical valve 341, and between the exterior body 340 and the spherical valve 341. A gap S is formed so that the first flow path R1 side and the chemical solution recovery unit 30 side communicate with each other. That is, the second valve mechanism 34 opens the second flow path R2 when the exterior body 340 is pressed. Further, as shown in FIG. 4, the second valve mechanism 34 is configured so that the entire exterior body 340 is restored by its own elasticity and is brought into close contact with the spherical valve 341 when the pressure against the exterior body 340 is released. Thereby, the 2nd valve mechanism 34 interrupts | blocks 2nd flow path R2 in the state which is not pressing with respect to the exterior body 340. FIG.

  As described above, the chemical solution recovery tool 3 of the prefilled syringe 1 according to the present embodiment has the cylindrical end 20 having the first end and the second end opposite to the first end, and the cylindrical tip 20a at the first end. The syringe 2 is provided with a piston 21 that is inserted into the cylinder 20 from the second end of the cylinder 20 and is movable in the axial direction of the cylinder 20, and between the piston 21 and the tube tip portion 20a. A chemical solution recovery unit 30 for the prefilled syringe 1 including the syringe 2 in which a predetermined amount of the chemical solution M is placed in the internal space of the cylinder 20, and a chemical solution recovery unit 30 configured to accommodate the chemical solution M; There are a first flow path R1 fluidly connected to the flow member 4, a second flow path R2 fluidly connected to the chemical recovery unit 30, and a third flow path R3 fluidly connected to the tube tip 20a. The first flow path 1, the second flow path R2 and the third flow path R3, and the second flow path R2 and the third flow path R3 in a state where the first flow path R1 is blocked. And a flow path switching structure 32 that communicates the first flow path R1 and the third flow path R3 with the second flow path R2 blocked.

  Therefore, in the prefilled syringe 1 (chemical solution recovery tool 3) having the above-described configuration, the chemical solution distribution member 4 including the injection needle and the drip tube C, the chemical solution recovery unit 30, and the cylinder tip portion of the syringe 2 with respect to the flow path forming unit 31. 20a is connected. Thereby, the chemical fluid circulation member 4 is fluidly connected to the first flow path R1, the second flow path R2 is fluidly connected to the chemical liquid recovery unit 30, and the third flow path R3 is fluidly connected to the tube tip portion 20a of the syringe 2. Connected.

  As shown in FIG. 6A, when the second flow path R2 and the third flow path R3 are communicated with each other with the flow path switching structure 32 blocking the first flow path R1, the second flow path R2 and the third flow path R3. The syringe 2 and the chemical solution recovery unit 30 communicate with each other via R3. Therefore, by pressing the piston 21 in this state, an unnecessary amount of the chemical solution M or a small amount of the chemical solution M discharged together with the gas remaining in the syringe 2 is sent to the chemical solution recovery unit 30 and collected. .

  At this time, if the drug solution M is pushed out more than necessary, the drug solution M in the syringe 2 becomes smaller than the amount necessary for the medication. However, the prefilled syringe 1 according to the present embodiment is recovered by the chemical recovery unit 30 by connecting the second flow path R2 and the third flow path R3 by the flow path switching structure 32 (second valve mechanism 34). The medicinal solution M can be returned to the syringe 2, and the medicinal solution M in the syringe 2 can be made into an amount necessary for medication. In the prefilled syringe 1 according to the present embodiment, since the chemical recovery unit 30 is a flexible container, the chemical recovery unit 30 is in a state where the second flow path R2 and the third flow path R3 are communicated. Can be returned to the syringe 2 by the external pressure, but the piston 21 of the syringe 2 is moved with the second flow path R2 and the third flow path R3 in communication with each other. The chemical liquid M in the chemical liquid recovery unit 30 can be returned to the syringe 2 only by performing a pulling operation.

  And after making the chemical | medical solution M in the syringe 2 suitable quantity, as shown to FIG. 6B, the 1st flow path R1 and the 3rd flow path R3 are connected in the state which the flow-path switching structure 32 interrupted | blocked the 2nd flow path R2. And the syringe 2 and the chemical | medical solution distribution | circulation member 4 are connected via 1st flow path R1 and 3rd flow path R3. Therefore, by pressing the piston 21 in this state, the drug solution M in the syringe 2 is sent to the drug solution distribution member 4, and the patient is dosed or mixed with the drug solution.

  Thus, according to the prefilled syringe 1 (chemical solution recovery tool 3) having the above-described configuration, the chemical solution M is collected by the chemical solution collecting unit 30 without being scattered around before the medication. As a result, the surrounding environment can be kept hygienic in the medical field, and the health of the user (doctor or nurse) can be prevented.

  In the present embodiment, the flow path switching structure 32 is a first valve mechanism 33 provided on the first flow path R1, and includes a first valve mechanism 33 capable of opening and closing the first flow path R1, and a second flow path R2. Since the second valve mechanism 34 provided on the upper side and the second valve mechanism 34 capable of opening and closing the second flow path R2 are provided, the first flow by the first valve mechanism 33 as shown in FIGS. 6A and 6B. By combining the opening / closing operation of the path R1 and the opening / closing operation of the second flow path R2 by the second valve mechanism 34, the second flow path R2 and the third flow path R3 are communicated while the first flow path R1 is shut off. And a state in which the first flow path R1 and the third flow path R3 are in communication with each other while the second flow path R2 is blocked.

  In addition, since the first valve mechanism 33 is configured to open along with the connection of the chemical solution circulation member 4, the first valve mechanism 33 is opened simply by connecting the chemical solution distribution member 4. The first valve mechanism 33 does not need to be opened and closed independently, and is optimal in the medical field where quick work is required.

  More specifically, in the present embodiment, the flow path forming portion 31 is a connector 40 provided on the chemical solution circulation member 4 and is inserted into the first flow path R1 as shown in FIGS. 2 and 6A. The first connected portion 310a is connectable to the connector 40 having the shaft-shaped portion 41, and the first valve mechanism 33 is pressed against the shaft-shaped portion 41 in a state where the connector 40 is connected to the first connected portion 310a. Since the valve body 330 is opened, the valve body 330 of the first valve mechanism 33 normally blocks the first flow path R1. 3 and 6B, when the connector 40 of the chemical solution distribution member 4 is connected to the flow path forming portion 31 (first connected portion 310a), the shaft-like portion 41 of the connector 40 presses the valve body 330. . Accordingly, the valve body 330 moves from a position where the first flow path R1 is blocked to a position where the first flow path R1 is opened. Accordingly, the first flow path R1 is automatically opened in conjunction with the connection of the chemical solution distribution member 4.

  Further, the second valve mechanism 34 is a cylindrical exterior body 340 that forms a part of the second flow path R2, and includes an exterior body 340 that is elastically deformable in the radial direction, and a spherical body that is housed in the exterior body 340. The valve 341 is provided, and the inner peripheral surface of the outer package 340 and the outer periphery of the spherical valve 341 are normally in close contact with each other to block the second flow path R2, while the spherical valve is pressed when the outer package 340 is pressed in the radial direction. Since the gap-shaped flow path is formed between the outer surface 341 and the outer body 340, the outer body 340 is configured to be elastically deformable in the radial direction. Therefore, the outer body 340 is configured as shown in FIGS. 5 and 6A. When deformed in the radial direction, it deforms into a flat shape, and the deformation of the exterior body 340 forms a gap between the spherical valve 341 and the exterior body 340, and the clearance is formed between the third flow path R <b> 3 and the chemical recovery part 30. It becomes the flow path which connects. On the other hand, as shown in FIGS. 4 and 6B, the exterior body 340 is restored to the original state (cylindrical state) when the pressure is released, and is in close contact with the spherical valve 341 so that the second flow path R2 is formed. Cut off.

  Accordingly, since the second valve mechanism 34 normally shuts off the second flow path R2, the forgetting to shut off the second flow path R2 causes the first flow path R1 and the third flow path R3 to communicate with each other. Can be prevented.

  Next, a second embodiment of the present invention will be described. In addition, the prefilled syringe which concerns on this embodiment is provided with the syringe and the chemical | medical solution collection tool similarly to 1st embodiment, and is provided with the same thing as the syringe of 1st embodiment about a syringe. Therefore, here, the description of the syringe substitutes the description of the first embodiment. Moreover, since the prefilled syringe which concerns on this embodiment has the structure similar to 1st embodiment other than a syringe, or the structure corresponding to it, suppose that the same name and the same code | symbol are attached | subjected about these structures.

  As shown in FIG. 7, the chemical recovery tool 3 includes a chemical recovery unit 30 configured to store the chemical M and a first flow path R <b> 1 fluidly connected to the chemical distribution member 4, as in the first embodiment. A flow path forming part 31 formed in a state where the second flow path R2 fluidly connected to the chemical liquid recovery part 30 and the third flow path R3 fluidly connected to the tube tip part 20a are joined together; The second flow path R2 and the third flow path R3 are communicated with the first flow path R1 blocked, while the first flow path R1 and the third flow path R3 are communicated with the second flow path R2 blocked. The flow path switching structure 32 is provided.

  The chemical solution recovery unit 30 may be any container that can store the chemical solution M. Also in this embodiment, the outer peripheral ends of the two stacked sheets are connected to each other, and the chemical solution M is stored between the two sheets. A bag-like container in which a space is formed is employed.

  In the flow path forming unit 31 according to the present embodiment, the first flow path R1, the second flow path R2, and the third flow path R3 are formed so as to merge at one place. That is, the flow path forming unit 31 includes a cylindrical main body part 310 that continuously forms the first flow path R1 and the third flow path R3, and a branch part that extends from a midway position in the axial direction of the main body part 310. 311 and a branch portion 311 formed with the second flow path R2 connected to the connection position of the first flow path R1 and the third flow path R3.

  The main body 310 continuously forms the first flow path R1 and the third flow path R3 as described above. That is, in the present embodiment, a half region on one end side of the main body 310 forms the first flow path R1, and a half region on the other end side of the main body 310 forms the third flow path R3.

  And the 1st to-be-connected part 310a for fluidly connecting the chemical | medical solution distribution member 4 is provided in the one end part of the main-body part 310, and the syringe 2 (cylinder 20) is provided in the other end part of the main-body part 310. A third connected portion 310b that is fluidly connected to the tube tip portion 20a is provided. In the present embodiment, the chemical liquid circulation member 4 is directly connected to the first connected portion 310a, and the third connected portion 310b is directly connected to the tube tip portion 20a of the syringe 2 (cylinder 20).

  The branch part 311 forms the second flow path R2 as a whole. The branch part 311 according to the present embodiment includes a straight part 312 extending in a direction orthogonal to the main body part 310 and an inclined part 313 inclined to the syringe 2 side with respect to the straight part 312.

  Each of the straight part 312 and the inclination part 313 is made into the cylinder shape, and has mutually continued internal space. Thereby, the straight part 312 and the inclination part 313 of the branch part 311 have demarcated 2nd flow path R2.

  In the present embodiment, the third connected part 310 b (the tip part of the inclined part 313) of the branch part 311 is sealed to the chemical solution recovery part 30. Specifically, a second connected portion 311a to which the chemical solution recovery unit 30 is connected is provided at the distal end portion (the distal end portion of the inclined portion 313) of the branch portion 311 according to the present embodiment. And as above-mentioned, as the chemical | medical solution collection | recovery part 30 is formed in a bag shape by connecting two films, the 2nd to-be-connected part 311a of the inclination part 313 comprises two sheets which comprise the chemical | medical solution collection | recovery part 30. After being sandwiched between the films, it is welded to the chemical recovery unit 30 (film). Accordingly, the second flow path R2 communicates with the internal space of the chemical solution recovery unit 30.

  In the present embodiment, the flow path switching structure 32 is a three-way valve provided at the joining position of the first flow path R1, the second flow path R2, and the third flow path R3. This will be described more specifically. The flow path switching structure 32 according to the present embodiment includes a valve body 320 provided to be rotatable around a rotation axis passing through a joining position of the first flow path R1, the second flow path R2, and the third flow path R3. The valve body 320 is disposed at a joining position of the first flow path R1, the second flow path R2, and the third flow path R3 in the internal space of the flow path forming portion 31. That is, in the flow channel switching structure 32 according to the present embodiment, the flow channel forming unit 31 is also used as a housing that houses the valve body 320.

  The valve body 320 includes a straight path 320a in which the first flow path R1 and the third flow path R3 can communicate with each other, the straight path 320a having both ends opened on the outer periphery of the valve body 320, and a first end. And a second end, and a first end is a branch path 320b connected to an intermediate position of the straight path 320a, and a second path is opened on the outer periphery of the valve body 320. . The straight path 320a and the branch path 320b extend in a direction perpendicular to the rotation axis. The valve mechanism according to the present embodiment is a handle (not numbered) for rotating the valve body 320 and includes a handle disposed outside the flow path forming unit 31. Thereby, the flow path switching structure 32 according to the present embodiment operates the handle to rotate the valve body 320, thereby blocking the first flow path R1 and the second flow path R2 and the third flow path R3. The communication is switched between the communication state and the communication state between the first flow path R1 and the third flow path R3 while blocking the second flow path R2.

  As described above, the chemical liquid recovery tool 3 of the prefilled syringe 1 with a chemical liquid recovery function according to the present embodiment has the first end and the second end opposite to the first end, and has the cylindrical tip portion 20a at the first end. And a piston 21 that is inserted into the cylinder 20 from the second end of the cylinder 20 and is movable in the axial direction of the cylinder 20. The chemical solution recovery unit 3 for the prefilled syringe 1 including the syringe 2 in which a predetermined amount of the chemical solution M is placed in the internal space of the cylinder 20 between the chemical solution M and the chemical solution recovery unit configured to accommodate the chemical solution M 30, a first flow path R1 fluidly connected to the chemical liquid circulation member 4, a second flow path R2 fluidly connected to the chemical liquid recovery section 30, and a third flow fluidly connected to the tube tip portion 20a. Road R3 And the first flow path R1, the second flow path R2, and the third flow path R3 formed in a state where the first flow path R1 and the third flow path R3 are joined together, and the second flow path R2 in a state where the first flow path R1 is blocked. And a third channel R3, and a channel switching structure 32 that communicates the first channel R1 and the third channel R3 with the second channel R2 shut off.

  Therefore, in the prefilled syringe 1 (chemical solution recovery tool 3) having the above-described configuration, the chemical solution circulation member 4, the chemical solution recovery unit 30, and the tube tip portion 20a of the syringe 2 are connected to the flow path forming unit 31. Thereby, the chemical fluid circulation member 4 is fluidly connected to the first flow path R1, the second flow path R2 is fluidly connected to the chemical liquid recovery unit 30, and the third flow path R3 is fluidly connected to the tube tip portion 20a of the syringe 2. Connected.

  As shown in FIG. 8A, when the second flow path R2 and the third flow path R3 are communicated with each other with the flow path switching structure 32 blocking the first flow path R1, the second flow path R2 and the third flow path R3. The syringe 2 and the chemical solution recovery unit 30 communicate with each other via R3. Therefore, by pressing the piston 21 in this state, an unnecessary amount of the chemical solution M or a small amount of the chemical solution M discharged together with the gas remaining in the syringe 2 is sent to the chemical solution recovery unit 30 and collected. .

  At this time, if the drug solution M is pushed out more than necessary, the drug solution M in the syringe 2 becomes smaller than the amount necessary for the medication. However, also in the prefilled syringe 1 according to the present embodiment, the chemical liquid M recovered in the chemical liquid recovery unit 30 is transferred to the syringe 2 by communicating the second flow path R2 and the third flow path R3 by the flow path switching structure 32. The medicinal solution M in the syringe 2 can be brought into an amount necessary for medication. In the prefilled syringe 1 according to the present embodiment, since the chemical recovery unit 30 has flexibility, the chemical recovery unit 30 is externally connected in a state where the second flow path R2 and the third flow path R3 are communicated. By compressing, the chemical solution in the chemical solution recovery unit 30 can be returned to the syringe 2, but the piston 21 of the syringe 2 is pulled and operated in a state where the second flow path R 2 and the third flow path R 3 are in communication. Alone, the chemical M in the chemical recovery unit 30 can be returned to the syringe 2.

  And after making the chemical | medical solution M in the syringe 2 suitable quantity, as shown to FIG. 8B, the 1st flow path R1 and the 3rd flow path R3 are connected in the state which the flow-path switching structure 32 interrupted | blocked the 2nd flow path R2. And the syringe 2 and the chemical | medical solution distribution | circulation member 4 are connected via 1st flow path R1 and 3rd flow path R3. Therefore, by pressing the piston 21 in this state, the drug solution M in the syringe 2 is sent to the drug solution distribution member 4, and the patient is dosed or mixed with the drug solution.

  Thus, according to the prefilled syringe 1 (chemical solution recovery tool 3) having the above-described configuration, the chemical solution M is collected by the chemical solution collecting unit 30 without being scattered around before the medication. As a result, the surrounding environment can be kept hygienic in the medical field, and the health of the user (doctor or nurse) can be prevented.

  In particular, in the present embodiment, the first flow path R1, the second flow path R2, and the third flow path R3 are formed so as to merge at one place, and the flow path switching structure 32 includes the first flow path R1, the second flow path R3, and the second flow path R3. Since the three-way valve is provided at the joining position of the flow path R2 and the third flow path R3, the second flow path R2 and the third flow path are blocked while the first flow path R1 is blocked by an operation on the single three-way valve. It is possible to switch between a state in which R3 is communicated and a state in which the first flow path R1 and the third flow path R3 are communicated while blocking the second flow path R2.

  Next, a third embodiment of the present invention will be described. In addition, the prefilled syringe which concerns on this embodiment is provided with the syringe and the chemical | medical solution collection tool similarly to 1st embodiment, and is provided with the same thing as the syringe 2 of 1st embodiment about a syringe. Therefore, here, the description of the syringe substitutes the description of the first embodiment. Moreover, since the prefilled syringe which concerns on this embodiment has the structure similar to 1st embodiment other than a syringe, or the structure corresponding to it, suppose that the same name and the same code | symbol are attached | subjected about these structures.

  As shown in FIG. 9, the chemical recovery tool 3 includes a chemical recovery unit 30 configured to store the chemical M and a first flow path R <b> 1 fluidly connected to the chemical distribution member 4, as in the first embodiment. , Having a second flow path R2 fluidly connected to the chemical liquid recovery unit 30 and a third flow path R3 fluidly connected to the tube tip 20a, the first flow path R1, the second flow path R2, and While the flow path forming portion 31 formed in a state where the third flow paths R3 are joined together, the second flow path R2 and the third flow path R3 are communicated with the first flow path R1 being blocked, A flow path switching structure 32 that connects the first flow path R1 and the third flow path R3 with the flow path R2 blocked is provided.

  The chemical solution recovery unit 30 may be any container that can store the chemical solution M. Also in this embodiment, the outer peripheral ends of the two stacked sheets are connected to each other, and the chemical solution M is stored between the two sheets. A bag-like container in which a space is formed is employed.

  In the flow path forming unit 31 according to the present embodiment, the first flow path R1, the second flow path R2, and the third flow path R3 are formed so as to merge at one place. That is, the flow path forming unit 31 includes a cylindrical main body part 310 that continuously forms the first flow path R1 and the third flow path R3, and a branch part that extends from a midway position in the axial direction of the main body part 310. 311 and a branch portion 311 formed with the second flow path R2 connected to the connection position of the first flow path R1 and the third flow path R3.

  The main body 310 continuously forms the first flow path R1 and the third flow path R3 as described above. That is, in the present embodiment, a half region on one end side of the main body 310 forms the first flow path R1, and a half region on the other end side of the main body 310 forms the third flow path R3.

  One end of the main body 310 is provided with a first connected portion 310a for fluidly connecting the chemical fluid circulation member 4, and the other end of the main body 310 is provided with the tip of the syringe 2 (cylinder 20). A third connected portion 310b that is fluidly connected to 20a is provided. In the present embodiment, the chemical liquid circulation member 4 is directly connected to the first connected portion 310a, and the third connected portion 310b is directly connected to the tube tip portion 20a of the syringe 2 (cylinder 20).

  The branch part 311 forms the second flow path R2 as a whole. The branch part 311 according to the present embodiment includes a straight part 312 extending in a direction orthogonal to the main body part 310 and an inclined part 313 inclined to the syringe 2 side with respect to the straight part 312. Each of the straight part 312 and the inclination part 313 is made into the cylinder shape, and has mutually continued internal space. Thereby, the straight part 312 and the inclination part 313 of the branch part 311 have demarcated 2nd flow path R2.

  In the present embodiment, the distal end side of the branch part 311 (the distal end side of the inclined part 313) is sealed to the chemical solution recovery part 30. Specifically, a second connected portion 311a to which the chemical solution recovery unit 30 is connected is provided at the distal end portion (the distal end portion of the inclined portion 313) of the branch portion 311 according to the present embodiment. And as above-mentioned, as the chemical | medical solution collection | recovery part 30 is formed in a bag shape by connecting two films, the 2nd to-be-connected part 311a of the inclination part 313 comprises two sheets which comprise the chemical | medical solution collection | recovery part 30. After being sandwiched between the films, it is welded to the chemical recovery unit 30 (film). Accordingly, the second flow path R2 communicates with the internal space of the chemical solution recovery unit 30.

  The flow path switching structure 32 is a first valve mechanism 33 provided on the first flow path R1, and is provided on the first valve mechanism 33 capable of opening and closing the first flow path R1 and the second flow path R2. The second valve mechanism 34 includes a second valve mechanism 34 that can open and close the second flow path R2.

  In the present embodiment, a two-way valve is employed for each of the first valve mechanism 33 and the second valve mechanism 34.

  This will be described more specifically. The first valve mechanism 33 according to the present embodiment is a valve body 330 disposed on the first flow path R1, and is provided so as to be rotatable around a rotation axis perpendicular to the center line of the first flow path R1. (Hereinafter referred to as a first valve body) 333. The first valve body 333 is disposed in an internal space that becomes the first flow path R1 in the flow path forming section 31 (main body section 310). That is, in the first valve mechanism 33 according to the present embodiment, the flow path forming portion 31 (main body portion 310) is also used as a housing that houses the first valve body 333. The first valve body 333 is a straight path 333a configured by a through-hole extending straight in a direction orthogonal to the rotation axis, and a straight path 333a that connects the first flow path R1 and the third flow path R3. Have.

  On the other hand, the second valve mechanism 34 according to the present embodiment is a valve body 330 disposed on the second flow path R2, and can rotate around a rotation axis perpendicular to the center line of the second flow path R2. Has a valve body (hereinafter referred to as a second valve body) 343. The 2nd valve body 343 is arrange | positioned in the internal space used as 2nd flow path R2 in the flow path formation part 31 (branch part 311). That is, in the second valve mechanism 34 according to the present embodiment, the flow path forming portion 31 (branching portion 311) is also used as a housing that houses the second valve body 343. And the 2nd valve body 343 is the straight path 343a comprised by the through-hole extended straight in the direction orthogonal to a rotating shaft, Comprising: The straight path 343a which the upstream and downstream in 2nd flow path R2 connect. Have

  In the present embodiment, the first valve mechanism 33 is a handle (not numbered) for rotating the first valve body 333, and includes a handle disposed outside the flow path forming unit 31, The two-valve mechanism 34 is a handle (not numbered) for rotating the second valve body 343 and includes a handle arranged outside the flow path forming unit 31.

  Thereby, the 1st valve mechanism 33 switches between the state which open | released 1st flow path R1 and the state interrupted | blocked by operating a handle | steering-wheel and rotating the 1st valve body 333. FIG. The second valve mechanism 34 is configured to switch between a state where the second flow path R2 is opened and a state where it is shut off by operating the handle and rotating the second valve body 343. That is, the prefilled syringe 1 according to the present embodiment has the second flow path R2 and the third flow path R3 while blocking the first flow path R1 by a combination of opening and closing of the first valve mechanism 33 and the second valve mechanism 34. The communication is switched between the communication state and the communication state between the first flow path R1 and the third flow path R3 while blocking the second flow path R2.

  As described above, the chemical solution recovery tool 3 of the prefilled syringe 1 according to the present embodiment has the cylindrical end 20 having the first end and the second end opposite to the first end, and the cylindrical tip 20a at the first end. The syringe 2 is provided with a piston 21 that is inserted into the cylinder 20 from the second end of the cylinder 20 and is movable in the axial direction of the cylinder 20, and between the piston 21 and the tube tip portion 20a. A chemical solution recovery tool 30 for the prefilled syringe 1 including the cylinder 20 in which a predetermined amount of the chemical solution M is placed in the internal space of the cylinder 20, and a chemical solution recovery unit 30 configured to accommodate the chemical solution M; A first flow path R1 fluidly connected to the flow member 4, a second flow path R2 fluidly connected to the chemical recovery part 30, and a third flow path R3 fluidly connected to the tube tip 20a are mutually connected. Merge The second flow path R2 and the third flow path R3 are communicated with the flow path forming portion 31 formed in the state and the first flow path R1 blocked, while the second flow path R2 is blocked and the first flow A flow path switching structure 32 for communicating the path R1 and the third flow path R3.

  Therefore, in the prefilled syringe 1 (chemical solution recovery tool 3) having the above-described configuration, the chemical solution circulation member 4, the chemical solution recovery unit 30, and the tube tip portion 20a of the syringe 2 are connected to the flow path forming unit 31. Thereby, the chemical fluid circulation member 4 is fluidly connected to the first flow path R1, the second flow path R2 is fluidly connected to the chemical liquid recovery unit 30, and the third flow path R3 is fluidly connected to the tube tip portion 20a of the syringe 2. Connected.

  Then, as shown in FIG. 10A, the second flow path R2 and the third flow path R3 are communicated with each other with the flow path switching structure 32 blocking the first flow path R1. That is, the first flow path R1 is blocked by the first valve mechanism 33, and the second flow path R2 is opened by the second valve mechanism 34. Thereby, the syringe 2 and the chemical | medical solution collection | recovery part 30 are connected via 2nd flow path R2 and 3rd flow path R3. Therefore, by pressing the piston 21 in this state, an unnecessary amount of the chemical solution M or a small amount of the chemical solution M discharged together with the gas remaining in the syringe 2 is sent to the chemical solution recovery unit 30 and collected. .

  At this time, if the drug solution M is pushed out more than necessary, the drug solution M in the syringe 2 becomes smaller than the amount necessary for the medication. However, also in the prefilled syringe 1 according to the present embodiment, the chemical liquid collecting unit 30 collects the second flow path R2 and the third flow path R3 by communicating with the flow path switching structure 32 (second valve mechanism 34). Thus, the medicinal solution M can be returned to the syringe 2, and the medicinal solution M in the syringe 2 can be made into an amount necessary for medication. In the prefilled syringe 1 according to the present embodiment, since the chemical recovery unit 30 has flexibility, the chemical recovery unit 30 is externally connected in a state where the second flow path R2 and the third flow path R3 are communicated. By compressing, the chemical solution in the chemical solution recovery unit 30 can be returned to the syringe 2, but the piston 21 of the syringe 2 is pulled and operated in a state where the second flow path R 2 and the third flow path R 3 are in communication. Alone, the chemical M in the chemical recovery unit 30 can be returned to the syringe 2.

  And after making the chemical | medical solution M in the syringe 2 suitable quantity, as shown to FIG. 10B, the 1st flow path R1 and the 3rd flow path R3 are connected in the state which the flow-path switching structure 32 interrupted | blocked the 2nd flow path R2. . That is, the first flow path R <b> 1 is opened by the first valve mechanism 33 and the second flow path R is blocked by the second valve mechanism 34. Thereby, the syringe 2 and the chemical | medical solution distribution | circulation member 4 are connected via 1st flow path R1 and 3rd flow path R3. Therefore, by pressing the piston 21 in this state, the drug solution M in the syringe 2 is sent to the drug solution distribution member 4 and is administered to the patient.

  Thus, according to the prefilled syringe 1 (chemical solution recovery tool 3) having the above-described configuration, the chemical solution M is collected by the chemical solution collecting unit 30 without being scattered around before the medication. As a result, the surrounding environment can be kept hygienic in the medical field, and the health of the user (doctor or nurse) can be prevented.

  In particular, the flow path switching structure 32 according to the present embodiment is a first valve mechanism 33 provided on the first flow path R1 as in the first embodiment, and is a first valve capable of opening and closing the first flow path R1. Since the mechanism 33 and the second valve mechanism 34 provided on the second flow path R2 and capable of opening and closing the second flow path R2 are provided, as shown in FIGS. 10A and 10B. By combining the opening and closing operation of the first flow path R1 by the first valve mechanism 33 and the opening and closing operation of the second flow path R2 by the second valve mechanism 34, the first flow path R1 and the second flow path R2 are blocked. It is possible to switch between a state in which the third flow path R3 is in communication and a state in which the first flow path R1 and the third flow path R3 are in communication while blocking the second flow path R2.

  Note that the present invention is not limited to the above-described embodiments, and it is needless to say that appropriate modifications can be made without departing from the gist of the present invention.

  In each said embodiment, although the prefilled syringe 1 with the drainage collection | recovery function provided with the syringe 2 and the chemical | medical solution collection | recovery tool 3 was demonstrated, the chemical | medical solution collection | recovery tool 3 is not limited to what was integrated with the syringe 2. FIG. For example, the chemical recovery tool 3 may be an independent part that can be attached to the syringe 2 in which the chemical M is enclosed. In each of the above embodiments, although not particularly mentioned, the prefilled syringe 1 with a chemical solution recovery function (chemical solution recovery tool 3) can be appropriately sterilized by a known sterilization method.

  In each said embodiment, although the chemical | medical solution collection | recovery part 30 was comprised with the bag-shaped container, it is not limited to this. For example, the chemical solution recovery unit 30 may be a bottle-shaped container. As described above, when a bottle-like container is employed for the chemical solution recovery unit 30, the chemical solution recovery unit 30 is prevented from being damaged, or when the chemical solution M is insufficient, the chemical solution M stored in the chemical solution recovery unit 30 is supplied to the syringe 2. In consideration of returning, it is preferable to make the chemical recovery part 30 flexible and soft.

  In each said embodiment, although the chemical | medical solution collection | recovery part 30 was connected to the flow path formation part 31 so that removal was not possible, it is not limited to this. For example, the chemical solution recovery unit 30 may be provided to be removable from the flow path forming unit 31.

  In each said embodiment, although the chemical | medical solution distribution | circulation member 4 provided with the tube C for infusion or mixed injection was demonstrated to an example, it is not limited to this. For example, the drug solution distribution member 4 connected to the first connected part 310a may be an injection needle that can be connected to the first connected part 310a.

  In each of the above embodiments, the chemical liquid M stored in the chemical liquid recovery unit 30 can flow toward the syringe 2 in a state where the flow path switching structure 32 communicates the second flow path R2 and the third flow path R3. Although configured, it is not limited to this. For example, in the channel switching structure 32 (second valve mechanism 34), the drug solution M is recovered from the syringe 2 side in a state where the channel switching structure 32 communicates the second channel R2 and the third channel R3. It may be configured to be able to circulate only toward the unit 30. However, in order to be able to return the drug solution M to the syringe 2 when the drug solution M is pushed out from the syringe 2 more than necessary (the liquid amount of the drug solution M in the syringe 2 can be adjusted), each of the above embodiments Needless to say, it is preferable to use the same method.

  In the first embodiment, the first valve mechanism 33 of the flow path switching structure 32 is based on the connection of the connector 40 having the shaft-like portion 41, but is not limited to this. The first valve mechanism 33 can be variously changed as long as it is a valve mechanism capable of opening and closing the flow path. The same applies to the second valve mechanism 34.

  In the first embodiment, the first valve mechanism 33 is configured to open with the connection of the connector 40 of the chemical solution distribution member 4, but is not limited thereto. For example, in the prefilled syringe 1 according to the first embodiment, the first valve mechanism 33 opens and closes the first flow path R1 by the user's operation without being related to the connection of the chemical liquid circulation member 4 as in the third embodiment. It may be a two-way valve.

  In the second embodiment, by adopting a three-way valve as the flow path switching structure 32, the third flow path R3 (to the first flow path R1) is used by the three-way valve (valve body 320) when not in use (during storage). For example, a cap for sealing the first connected portion 310a may be provided. In this way, even if the straight path 320a of the valve body 320 is in a state where the first flow path R1 and the third flow path R3 are communicated, the chemical solution M is prevented from leaking.

  DESCRIPTION OF SYMBOLS 1 ... Prefilled syringe (prefilled syringe with a chemical | medical solution collection | recovery function), 2 ... Syringe, 3 ... Chemical solution collection tool, 4 ... Chemical solution distribution member, 20 ... Cylinder, 20a ... Tube tip part, 21 ... Piston, 30 ... Chemical solution collection part, 31 ... Flow path forming part, 32 ... Flow path switching structure, 33 ... First valve mechanism, 34 ... Second valve mechanism, 40 ... Connector, 41 ... Shaft-shaped part, 42 ... First connection part, 43 ... Second connection part, 310 ... Main body part, 310a ... First connected part, 310b ... Third connected part, 311 ... Branching part, 311a ... Second connected part, 312 ... Straight part, 312a ... First straight part, 312b ... Second Straight part, 313 ... inclined part, 320 ... valve body, 320a ... straight path, 320b ... branch path, 330 ... valve body, 331 ... valve body housing part, 331a ... valve seat part, 332 ... biasing member, 333 ... first One valve body, 333a ... Rail, 340 ... exterior body, 340a ... seal part, 340b ... supporting convex part, 341 ... spherical valve, 343 ... second valve body, 343a ... straight path, H ... through hole, Ha ... enlarged hole part, Hb, Hc ... small-diameter hole, M ... chemical, R1 ... first flow path, R2 ... second flow path, R3 ... third flow path

Claims (7)

  A cylindrical cylinder having a first end and a second end opposite to the first end and having a cylindrical tip at the first end, and inserted into the cylinder from the second end of the cylinder and movable in the axial direction of the cylinder A pre-filled syringe liquid medicine collecting tool including a syringe in which a predetermined amount of liquid medicine is placed in the internal space of the cylinder between the piston and the cylinder tip, A chemical solution recovery unit configured to be able to store a chemical solution, and a fluid solution member that is fluidly connected to a chemical solution flow channel when a drug solution is dispensed to a patient or a chemical solution flow member that forms a chemical solution flow channel when a chemical solution is mixedly injected. A first flow path, a second flow path that is fluidly connected to the chemical solution recovery section, and a third flow path that is fluidly connected to the cylinder tip, and a first flow path The second flow path and the third flow path in the state of being cut off The while communicating, chemicals collecting device for prefilled syringes, characterized in that in a state of blocking the second passage and a first flow path and the flow path switching structure for communicating the third flow path.   The channel switching structure is a first valve mechanism provided on the first channel, a first valve mechanism capable of opening and closing the first channel, and a second valve mechanism provided on the second channel, The chemical | medical solution collection | recovery tool for prefilled syringes of Claim 1 provided with the 2nd valve mechanism which can open and close a 2nd flow path.   The chemical solution recovery tool for a prefilled syringe according to claim 2, wherein the first valve mechanism is configured to open in accordance with connection of the chemical solution distribution member.   The flow path forming part is a connector provided in the chemical solution distribution member, and has a connected part that can be connected to a connector having a shaft-like part inserted into the first flow path. The drug solution recovery tool for a prefilled syringe according to claim 3, further comprising a valve body that is pressed by the shaft-like portion and opens when the connector is connected to the connection portion.   The second valve mechanism is a cylindrical exterior body that forms a part of the second flow path, and includes an exterior body that can be elastically deformed in the radial direction, and a spherical valve that is housed in the exterior body. While the inner peripheral surface of the exterior body and the outer periphery of the spherical valve are in close contact with each other to block the second flow path, a flow path is formed between the spherical valve and the exterior body when the exterior body is pressed in the radial direction. The chemical solution recovery tool for a prefilled syringe according to any one of claims 2 to 4.   The first flow path, the second flow path, and the third flow path are formed so as to merge at one place, and the flow path switching structure is located at the merge position of the first flow path, the second flow path, and the third flow path. The chemical solution recovery tool for a prefilled syringe according to claim 1, which is a three-way valve provided.   A cylindrical cylinder having a first end and a second end opposite to the first end and having a cylindrical tip at the first end, and inserted into the cylinder from the second end of the cylinder and movable in the axial direction of the cylinder And a syringe having a predetermined amount of chemical solution in an internal space of the cylinder between the piston and the cylinder tip. A prefilled syringe with a chemical solution recovery function, comprising the chemical solution recovery tool described in the item.

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