Radiopharmaceutical injector

Abstract

The utility model relates to the technical field of injectors, and discloses a radiopharmaceutical injector which comprises an outer sleeve, a core rod, a rubber plug and an injection needle, an inner sleeve is connected in the outer sleeve in a sliding and sealing mode, the rubber plug is connected in the inner sleeve in a sliding and sealing mode, a first cavity is formed between the rubber plug and the inner sleeve, and the first cavity is used for storing normal saline. A second cavity is formed between the inner sleeve and the outer sleeve and used for storing radiopharmaceuticals, the core rod penetrates through the top of the inner sleeve to be fixedly connected with the rubber plug, a first liquid outlet is formed in the bottom of the inner sleeve, a valve assembly is arranged at the first liquid outlet, a second liquid outlet is formed in the inner bottom of the outer sleeve, and a trigger piece is arranged at the second liquid outlet. The trigger is used for opening the valve assembly. According to the utility model, the problems that part of radiopharmaceutical residues exist in the syringe in the prior art, so that on one hand, medicine waste is caused, and on the other hand, certain potential safety hazards exist can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of syringes, in particular to a radioactive drug syringe. Background Art

[0002] A syringe is a common medical device that uses a needle to draw or inject liquids. Radiopharmaceuticals are commonly used in nuclear medicine as an alternative to standard radiation therapy to treat certain cancers, or as a diagnostic tool to better image the inside of certain organs and arteries.

[0003] Currently, radioactive drugs are mostly injected into patients through intravenous injection. For patients who have an intravenous catheter, the radioactive drug can be injected by connecting the syringe to the catheter. For patients who do not have an intravenous catheter, the needle needs to be inserted into the patient's arm vein for injection.

[0004] During use, it was found that after the drug injection was completed, some radioactive drugs would remain in the connecting tube at the end of the syringe, which not only posed a certain safety hazard, but also caused drug waste. Moreover, when the needle was inserted into the patient's arm vein for injection, it was not convenient to adjust the puncture angle. Utility Model Content

[0005] In view of this, the purpose of the utility model is to provide a radioactive drug syringe to solve the problem in the prior art that some radioactive drugs may remain in the syringe, which on the one hand causes waste of drugs and on the other hand poses certain safety hazards.

[0006] The utility model solves the above technical problems through the following technical means:

[0007] A radioactive drug syringe comprises an outer sleeve, a core rod, a rubber plug and an injection needle, wherein the inner sleeve is slidably and sealingly connected to the outer sleeve, the rubber plug is slidably and sealingly connected to the inner sleeve, a first cavity is formed between the rubber plug and the inner sleeve, the first cavity is used to store physiological saline, a second cavity is formed between the inner sleeve and the outer sleeve, the second cavity is used to store radioactive drugs, the core rod passes through the top of the inner sleeve and is fixedly connected to the rubber plug, a first liquid outlet is formed at the bottom of the inner sleeve, a valve assembly is arranged at the first liquid outlet, a second liquid outlet is arranged at the bottom of the outer sleeve, a trigger is arranged at the second liquid outlet, the trigger is used to open the valve assembly.

[0008] Further, the valve assembly includes a mounting shell, a sealing plug and a spring, the mounting shell is fixedly connected to the inner bottom of the inner sleeve, the mounting shell is used to separate the first cavity and the first liquid outlet, the sealing plug is slidably arranged in the mounting shell, the spring is connected between the top of the sealing plug and the top of the mounting shell, and a plurality of first slots are opened at the bottom of the mounting shell, the first slots are used to connect the first cavity and the first liquid outlet, and the sealing plug is used to seal the first liquid outlet.

[0009] Furthermore, a limiting ring is arranged in the first liquid outlet, an annular groove is opened on the sealing plug, and the limiting ring is clamped in the annular groove.

[0010] Furthermore, the trigger member includes a trigger ring, and a plurality of second notches are formed on the trigger ring. The trigger ring is used to push the sealing plug upward, and the second notches can be communicated with the first notches.

[0011] Furthermore, the inner sleeve and the sealing plug are both covered with sealing rings.

[0012] Furthermore, a column is provided on the top of the mounting shell, a receiving groove is provided in the core rod, the receiving groove passes through the rubber plug, the column is slidably and sealedly connected in the receiving groove, a vent hole is provided on the column, the vent hole is connected to the inside of the mounting shell, and a vent groove is provided on the core rod, the vent groove is connected to the receiving groove.

[0013] Furthermore, a threaded hole is provided at the top of the inner sleeve, the core rod is threadedly connected to the threaded hole, a plurality of limit strips are provided on the outer wall of the inner sleeve, a plurality of limit grooves are provided on the inner wall of the outer sleeve, and the limit strips are inserted into the limit grooves.

[0014] Furthermore, a connecting tube is provided at the second liquid outlet, a hose is connected to the connecting tube, and the injection needle is connected to the free end of the hose.

[0015] Beneficial effects of the utility model:

[0016] 1. The utility model arranges an inner sleeve, a valve assembly and a trigger member in an outer sleeve. When the radioactive drug in the second cavity is injected, the trigger member opens the valve assembly and continues to push forward, so that the physiological saline in the first cavity can be pushed out to flush the radioactive drug in the connecting tube at the end of the syringe, thereby reducing drug residue.

[0017] 2. The utility model can prevent the inner sleeve from rotating relative to the outer sleeve by setting a limit strip and a limit groove, and then the plug can be moved only by rotating the core rod by threading the core rod in the threaded hole. When in use, the core rod is first pushed to move the inner sleeve, and the radioactive drug in the second cavity is completely pushed out, and then the core rod is rotated to push out the saline in the first cavity for flushing. It can ensure that the radioactive drug in the first cavity is completely pushed out, and then the saline is pushed out for flushing, so as to avoid the radioactive drug remaining in the second cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a radioactive drug syringe of the utility model;

[0019] Figure 2 It is a cross-sectional structural schematic diagram of a radioactive drug syringe valve assembly in an open state of the utility model;

[0020] Figure 3 yes Figure 2 A is a schematic diagram of the enlarged structure of the middle part;

[0021] Figure 4 It is a schematic cross-sectional structure diagram of a radioactive drug syringe of the utility model;

[0022] Figure 5 This is a schematic diagram of the cross-sectional structure of a radioactive drug syringe of the utility model;

[0023] Among them, 1. outer sleeve; 11. second liquid outlet; 111. connecting tube; 12. trigger ring; 121. second notch; 13. limit groove; 2. inner sleeve; 21. first liquid outlet; 211. limit ring; 22. threaded hole; 23. limit strip; 3. core rod; 31. receiving groove; 32. vent groove; 4. rubber plug; 51. hose; 52. injection needle; 61. first cavity; 62. second cavity; 71. mounting shell; 711. first notch; 712. column; 713. vent hole; 72. sealing plug; 721. annular groove; 73. spring. DETAILED DESCRIPTION

[0024] The following describes the implementation of the present invention through specific embodiments. Those skilled in the art can understand the advantages and effects of the present invention from the contents disclosed in this specification. It should be noted that the illustrations provided in the following embodiments are only for exemplary descriptions, and they are only schematic diagrams, not physical diagrams, and cannot be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts in the figures may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the figures may be omitted.

[0025] The same or similar numbers in the figures of the embodiments of the present invention correspond to the same or similar parts. In the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "back", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the figures, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the figures are only used for illustrative purposes and cannot be understood as limitations on the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0026] like Figure 1-Figure 5 As shown, a radioactive drug syringe of the utility model comprises an outer sleeve 1, an inner sleeve 2, a core rod 3, a rubber plug 4, a hose 51 and an injection needle 52. The inner sleeve 2 is slidably and sealedly connected to the outer sleeve 1, the rubber plug 4 is slidably and sealedly connected to the inner sleeve 2, a first cavity 61 is formed between the rubber plug 4 and the inner sleeve 2, and the first cavity 61 is used to store physiological saline. A second cavity 62 is formed between the inner sleeve 2 and the outer sleeve 1, and the second cavity 62 is used to store radioactive drugs.

[0027] In this embodiment, a second liquid outlet 11 is provided at the bottom of the outer sleeve 1. When the inner sleeve 2 moves downward relative to the outer sleeve 1, the radioactive drug in the second cavity 62 can be discharged from the second liquid outlet 11. A first liquid outlet 21 is provided at the bottom of the inner sleeve 2. A valve assembly is provided at the first liquid outlet 21. The valve assembly is used to block the first liquid outlet 21. A trigger is provided at the second liquid outlet 11. The trigger is used to open the valve assembly. After the trigger opens the valve assembly, when the rubber plug 4 moves downward relative to the inner sleeve 2, the physiological saline in the first cavity 61 can be discharged through the first liquid outlet 21 and the second liquid outlet 11 in sequence.

[0028] Specifically, the valve assembly includes a mounting shell 71, a sealing plug 72 and a spring 73. The mounting shell 71 is fixedly connected to the inner bottom of the inner sleeve 2. The mounting shell 71 is used to separate the first cavity 61 and the first liquid outlet 21. The sealing plug 72 is slidably arranged in the mounting shell 71. The spring 73 is connected between the top of the sealing plug 72 and the top of the mounting shell 71. A plurality of first notches 711 are provided at the bottom of the mounting shell 71. The first notches 711 are used to connect the first cavity 61 and the first liquid outlet 21. The sealing plug 72 is used to block the first liquid outlet 21. The spring 73 is a compression spring. The elastic force of the spring 73 blocks the sealing plug 72 at the first liquid outlet 21 and maintains a certain pressure. The trigger member includes a trigger ring 12, which is fixedly connected to the outer sleeve 1. The trigger ring 12 is provided with a plurality of second notches 121. When the inner sleeve 2 moves downward, the trigger ring 12 abuts against the sealing plug 72, and the trigger ring 12 blocks the sealing plug 72, preventing the sealing plug 72 from moving downward with the inner sleeve 2, so that the spring 73 is further compressed, and the sealing plug 72 moves upward relative to the mounting shell 71, so that the first cavity 61, the first notch 711, the first liquid outlet 21, the second notch 121 and the second liquid outlet 11 are all connected. At this time, the rubber plug 4 is moved downward relative to the inner sleeve 2, so that the physiological saline in the first cavity 61 can be discharged through the first notch 711, the first liquid outlet 21, the second notch 121 and the second liquid outlet 11 in sequence, and the radioactive drug in the connecting tube 111 at the end of the syringe is flushed to reduce drug residue.

[0029] In this embodiment, a limiting ring 211 is disposed in the first liquid outlet 21, and an annular groove 721 is formed on the sealing plug 72. The limiting ring 211 is clamped in the annular groove 721. Limiting the sealing plug 72 can prevent the sealing plug 72 from being separated from the mounting shell 71 at the first liquid outlet 21.

[0030] In this embodiment, both the inner sleeve 2 and the sealing plug 72 are covered with sealing rings, through which the inner sleeve 2 is slidably and sealedly connected to the outer sleeve 1, thereby improving the sealing performance of the sealing plug 72 to the first liquid outlet 21.

[0031] In this embodiment, the core rod 3 passes through the top of the inner sleeve 2 and is fixedly connected to the rubber plug 4. Specifically, a threaded hole 22 is provided at the top of the inner sleeve 2, and the core rod 3 is threadedly connected in the threaded hole 22. A plurality of limit bars 23 are provided on the outer wall of the inner sleeve 2, and a plurality of limit grooves 13 are provided on the inner wall of the outer sleeve 1. The limit bars 23 are inserted in the limit grooves 13. The limit bars 23 and the limit grooves 13 are used to prevent the inner sleeve 2 from rotating relative to the outer sleeve 1. When the core rod 3 is moved up and down, the inner sleeve 2 can be driven to move up and down, thereby realizing the operation of drawing the radioactive drug into the second cavity 62 and discharging the radioactive drug in the second cavity 62. When the core rod 3 is rotated, the rubber plug 4 can be driven to move up and down, thereby realizing the operation of drawing the physiological saline into the first cavity 61 and discharging the physiological saline in the first cavity 61.

[0032] In this embodiment, a column 712 is provided on the top of the mounting shell 71, a receiving groove 31 is opened in the core rod 3, the receiving groove 31 passes through the rubber plug 4, and the column 712 is slidably and sealedly connected in the receiving groove 31. By providing the column 712 and the receiving groove 31, the rubber plug 4 can fit with the bottom surface of the inner sleeve 2 so as to completely discharge the physiological saline in the first cavity 61.

[0033] In this embodiment, a vent hole 713 is provided on the column 712, and the vent hole 713 is communicated with the inside of the mounting shell 71. A vent groove 32 is provided on the core rod 3, and the vent groove 32 is communicated with the receiving groove 31. By providing the vent hole 713 and the vent groove 32, the air pressure in the mounting shell 71 is balanced to avoid the sealing plug 72 being unable to move up and down due to the air pressure.

[0034] In this embodiment, a connecting tube 111 is provided at the second liquid outlet 11, a hose 51 is connected to the connecting tube 111, and an injection needle 52 is connected to the free end of the hose 51. By providing the connecting hose 51, it is convenient for medical staff to adjust the puncture angle of the injection needle 52 during operation.

[0035] The method of using the utility model is as follows:

[0036] The steps for drawing up saline and radioactive drugs are as follows:

[0037] First, move the core rod 3 downward to push the inner sleeve 2 downward so that the inner sleeve 2 is at the lowest position;

[0038] Secondly, the core rod 3 is rotated to move the rubber plug 4 downward so that the rubber plug 4 is located at the lowest position;

[0039] Then, the injection needle 52 is inserted into the physiological saline solution, and the core rod 3 is rotated to move the rubber plug 4 upward, and the physiological saline solution is drawn through the injection needle 52;

[0040] Subsequently, the injection needle 52 is inserted into the radioactive drug, the core rod 3 is moved upward, the inner sleeve 2 is pulled upward, and the radioactive drug is drawn out through the injection needle 52 .

[0041] The steps for injecting a radiopharmaceutical are as follows:

[0042] First, the injection needle 52 is inserted into the patient's arm vein;

[0043] Secondly, the core rod 3 is moved downward to push the inner sleeve 2 downward, and the radioactive drug in the second cavity 62 is discharged from the second liquid outlet 11, and injected into the patient's body through the hose 51 and the injection needle 52 until the inner sleeve 2 is at the lowest position. During the downward movement of the inner sleeve 2, the trigger ring 12 abuts against the sealing plug 72, and the trigger ring 12 blocks the sealing plug 72, preventing the sealing plug 72 from moving downward with the inner sleeve 2, so that the spring 73 is further compressed, and the sealing plug 72 moves upward relative to the mounting shell 71, so that the first cavity 61, the first notch 711, the first liquid outlet 21, the second notch 121 and the second liquid outlet 11 are all connected. Then, the core rod 3 is rotated to move the rubber plug 4 downward, and the physiological saline in the first cavity 61 is discharged through the first notch 711, the first liquid outlet 21, the second notch 121 and the second liquid outlet 11 in sequence, and the radioactive drug in the connecting tube 111 at the end of the syringe is flushed to reduce drug residue.

[0044] The above embodiments are only used to illustrate the technical solution of the utility model and are not intended to limit it. Although the utility model is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model. The technology, shape, and structure that are not described in detail in the utility model are all well-known technologies.

Claims

1. A radioactive drug syringe, comprising an outer sleeve (1), a core rod (3), a rubber plug (4) and an injection needle (52), characterized in that: The outer sleeve (1) is slidably and sealingly connected to the inner sleeve (2); the rubber plug (4) is slidably and sealingly connected to the inner sleeve (2); a first cavity (61) is formed between the rubber plug (4) and the inner sleeve (2); the first cavity (61) is used to store physiological saline; a second cavity (62) is formed between the inner sleeve (2) and the outer sleeve (1); the second cavity (62) is used to store radioactive drugs; the core rod (3) passes through the top of the inner sleeve (2) and is fixedly connected to the rubber plug (4); a first liquid outlet (21) is formed at the bottom of the inner sleeve (2); a valve assembly is arranged at the first liquid outlet (21); a second liquid outlet (11) is provided at the bottom of the outer sleeve (1); a trigger is provided at the second liquid outlet (11); the trigger is used to open the valve assembly.

2. A radioactive drug syringe according to claim 1, characterized in that: The valve assembly comprises a mounting shell (71), a sealing plug (72) and a spring (73); the mounting shell (71) is fixedly connected to the inner bottom of the inner sleeve (2); the mounting shell (71) is used to separate the first cavity (61) and the first liquid outlet (21); the sealing plug (72) is slidably arranged in the mounting shell (71); the spring (73) is connected between the top of the sealing plug (72) and the top of the mounting shell (71); a plurality of first slots (711) are provided at the bottom of the mounting shell (71); the first slots (711) are used to connect the first cavity (61) and the first liquid outlet (21); the sealing plug (72) is used to seal the first liquid outlet (21).

3. A radioactive drug syringe according to claim 2, characterized in that: A limiting ring (211) is arranged in the first liquid outlet (21), an annular groove (721) is provided on the sealing plug (72), and the limiting ring (211) is clamped in the annular groove (721).

4. A radioactive drug syringe according to claim 2, characterized in that: The trigger member comprises a trigger ring (12), a plurality of second notches (121) are provided on the trigger ring (12), the trigger ring (12) is used to push the sealing plug (72) upward, and the second notches (121) can be communicated with the first notches (711).

5. A radioactive drug syringe according to claim 2, characterized in that: The inner sleeve (2) and the sealing plug (72) are both covered with sealing rings.

6. A radioactive drug syringe according to claim 2, characterized in that: A column (712) is provided on the top of the mounting shell (71); a receiving groove (31) is provided in the core rod (3); the receiving groove (31) penetrates the rubber plug (4); the column (712) is slidably sealed and connected in the receiving groove (31); a vent hole (713) is provided on the column (712); the vent hole (713) is communicated with the inside of the mounting shell (71); a vent groove (32) is provided on the core rod (3); the vent groove (32) is communicated with the receiving groove (31).

7. A radioactive drug syringe according to any one of claims 1 to 6, characterized in that: A threaded hole (22) is provided on the top of the inner sleeve (2), and the core rod (3) is threadedly connected to the threaded hole (22). A plurality of limit strips (23) are provided on the outer wall of the inner sleeve (2), and a plurality of limit grooves (13) are provided on the inner wall of the outer sleeve (1), and the limit strips (23) are inserted into the limit grooves (13).

8. A radioactive drug syringe according to claim 1, characterized in that: A connecting tube (111) is provided at the second liquid outlet (11), a hose (51) is connected to the connecting tube (111), and the injection needle (52) is connected to the free end of the hose (51).

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