Split pre-filled syringe

Abstract

The utility model provides a split pre-filled syringe, and relates to the technical field of medical syringes. One end of the cylinder body is provided with a nipple, and the other end of the cylinder body is provided with a boss; the sealing plug is arranged in the cylinder body and can slide along the cylinder body; a storage space is formed in an area between the sealing plug and the nipple; the storage space is filled with a medicament; one end of the nipple is connected with a tearable sealing cover; one end of the plug seat is connected with the sealing plug; a limiting groove is formed in the plug seat; one end of the plug shaft is detachably connected with the other end of the plug seat; the positioning piece is detachably connected to the boss, and the positioning piece can be connected with the limiting groove in a matched and clamped mode; the outer sleeve and the inner sleeve are in threaded connection and can be matched and clamped with the flange at the needle cap to form limiting; the device is a disposable medical supply, is clean and sanitary, is convenient to operate and is safe to use.

Description

Technical Field

[0001] The utility model relates to the technical field of medical syringes, in particular to a split pre-filled syringe. Background Art

[0002] As an integrated device for drug storage and use, prefilled syringes can be effectively used in many occasions, such as vaccination, first aid treatment for soldiers on the battlefield, first aid treatment for the masses by firefighters, micro plastic surgery, chemotherapy drug injection, etc.

[0003] Existing pre-filled syringes, such as a pre-filled sterile dispensing syringe disclosed in the patent with the authorization announcement number CN 218739750 U, although pre-filling is achieved, there are still some practical problems:

[0004] 1. The push rod and the piston are fixedly connected, so after pre-filling the medicine, the push rod is extended to increase the overall length, occupying a large space, and is inconvenient to carry and transport. In the event of an external impact, the push rod may move, increasing the unsafe factor. In addition, its structural design is complex and inconvenient to assemble. For example, the diameter of the piston is larger than the diameter of the top opening of the cylinder, which makes it impossible for the piston to enter the cylinder smoothly, which undoubtedly increases the difficulty.

[0005] 2. During certain operations, since the connection between the syringe and the needle cap is only a socket connection, when pressurized injection is required, this connection is not tight enough and splashing may occur. Unless the operator holds the socket connection point with one hand and pushes the injection with the other hand, this method is relatively troublesome and needs to be improved. Utility Model Content

[0006] The utility model aims to solve one of the technical problems in the related art at least to a certain extent. To this end, the utility model proposes a split pre-filled syringe.

[0007] The technical solution of the utility model to solve the technical problem is:

[0008] The utility model provides a split pre-filled syringe, comprising:

[0009] A barrel, wherein one end of the barrel has a nipple, and the other end has a boss for convenient finger gripping;

[0010] The sealing plug is arranged in the barrel and can slide along the barrel; the area between the sealing plug and the nipple forms a storage space;

[0011] The storage space is filled with medicine; one end of the nipple is connected to a detachable cover; the cover and the sealing plug seal the medicine in the cylinder; and further comprises:

[0012] A plug seat, one end of which is connected to the sealing plug; a limiting groove is provided on the plug seat;

[0013] A plug shaft, one end of which is detachably connected to the other end of the plug seat;

[0014] The positioning member is detachably connected to the boss, and the positioning member can be adapted and snap-fitted with the limiting groove.

[0015] Preferably, an internal threaded hole is provided on the plug seat, and one end of the plug shaft has an external thread, and the external thread can be threadedly connected with the internal threaded hole.

[0016] Preferably, at least two groups of elastic hooks are provided on the plug seat, one end of the plug seat is connected to an end cap, the end cap is a hollow structure, and a slot is provided on the inner wall of the end cap, and the hook can extend into the end cap and fit into the slot.

[0017] Preferably, the inner wall of the end cap has an inclined portion, and a card platform structure is formed between the inclined portion and the card slot; the inclined portion extends from one end of the end cap toward the card slot, and when in use, the inclined portion can cause the hook to retract inward.

[0018] Preferably, the positioning member is a positioning plate, one end of which is adapted to be snap-fitted to the limiting groove, and the other end of which is thermally bonded to the boss, and a breakpoint tear line is provided at the connection between the positioning plate and the boss to form a tearable structure.

[0019] Preferably, it also includes a puncture needle, which is connected to the nipple; an outer sleeve is also provided at the nipple, one end of the outer sleeve is fixedly connected to the cylinder body; an inner sleeve is provided inside the outer sleeve, one end of the inner sleeve has an edge, and the edge can be adapted to be snap-fitted with a flange at the needle cap of the puncture needle; the inner sleeve and the outer sleeve are threadedly connected.

[0020] Preferably, the length of the outer sleeve is smaller than the length of the nipple.

[0021] Preferably, scale lines are provided on the outer wall of the cylinder.

[0022] Preferably, the hook and the end cap are both made of plastic material.

[0023] Preferably, it further comprises an outer packaging bag, in which the cylinder, the sealing plug, the plug shaft, the plug seat and the positioning piece are all sealed.

[0024] The above technical solution has the following advantages or beneficial effects:

[0025] 1. The utility model pre-loads the medicine in the cylinder, eliminating the need for pipetting and other operations. When in use, the outer packaging bag can be torn open for direct use, and the sterility principle in the operation is more strictly enforced. The device is a disposable medical product, clean and hygienic, and easy to operate; by setting different specifications, it can meet different usage needs and has few limitations.

[0026] 2. In the utility model, the plug shaft is designed as a detachable structure, which can be a snap connection or a threaded connection, which reduces the overall length, occupies a small space, is convenient for assembly and carrying, and reduces the probability of the plug shaft being accidentally squeezed.

[0027] 3. In the utility model, a positioning piece is designed and a limiting groove with an adaptable connection is configured. In this way, after filling with anhydrous ethanol, the positioning piece is used to position the plug seat, that is, the sealing plug, to prevent the sealing plug from moving forward and backward, so as to prevent the sealing plug from falling out and causing the medicine to flow out, thereby improving safety in use.

[0028] 4. The positioning piece is connected by hot-melt connection, and the connection point has a breakpoint tear line to form a tearable structure. When in use, the limit can be easily released, and the operation is convenient.

[0029] 5. By setting the outer sleeve and the inner sleeve, and utilizing the cooperation of the inner sleeve and the outer sleeve, the needle cap can be locked and positioned to ensure that the connection between the needle cap and the nipple is reliable. There is no need for manual gripping, which frees up both hands and is more conducive to the injection operation of medical staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention.

[0031] Figure 1 It is a structural schematic diagram of a puncture needle in the prior art.

[0032] Figure 2 It is a structural schematic diagram of the disposable injection set device proposed by the utility model (unassembled state).

[0033] Figure 3 yes Figure 2 Structural explosion diagram of the middle cylinder, positioning piece, sealing plug and plug seat.

[0034] Figure 4 It is a three-dimensional diagram of the structure of the plug shaft and the end cap.

[0035] Figure 5 It is a structural schematic diagram of the disposable injection set device proposed by the utility model (assembly state 1).

[0036] Figure 6It is a schematic diagram of the structure of the disposable injection set device proposed by the utility model (assembly state 2).

[0037] Figure 7 yes Figure 6 A structural cross-sectional view of a disposable injection set device.

[0038] Figure 8 yes Figure 7 Schematic diagram of the enlarged structure of area A in the middle.

[0039] Fig. 9 yes Figure 7 Schematic diagram of the enlarged structure of region B in the middle.

[0040] Fig.10 It is a schematic diagram of the structure of the inner sleeve when the puncture needle is inserted.

[0041] Description of reference numerals:

[0042] 1. puncture needle; 2. needle cap; 21. flange; 3. outer packaging bag; 4. cylinder; 41. boss; 5. plug shaft; 6. end cap; 61. slot; 62. oblique part; 7. nipple; 71. cover; 8. sealing plug; 9. plug seat; 10. limit groove; 11. hook; 12. positioning plate; 13. outer sleeve; 14. inner sleeve; 141. edge. DETAILED DESCRIPTION

[0043] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0044] Embodiment 1:

[0045] like Figure 1 - Fig.10As shown in the figure, this embodiment proposes a split pre-filled syringe, which includes a barrel 4. One end of the barrel 4 has a nipple 7, and the other end has a boss 41 for convenient finger gripping. The barrel 4 has the same structure as a conventional syringe. And a sealing plug 8 is arranged in the barrel 4 and can slide along the barrel 4. A sealed sliding structure is formed between the sealing plug 8 and the barrel 4. When the sealing plug 8 slides a certain distance, a storage space is formed between the sealing plug 8 and the nipple 7, and the storage space is filled with a medicament. One end of the nipple 7 is connected with a peelable cover 71. The cover 71 adopts a peelable structure, such as an aluminum foil sealing paper, which is convenient for subsequent operations. The cover 71 and the sealing plug 8 seal the medicament in the barrel 4, which can effectively ensure cleanliness and hygiene. The medicament includes but is not limited to anhydrous ethanol, microplastic fillers, vaccines, chemotherapy drugs, etc. This device can be applied to multiple scenarios, such as vaccine injection, battlefield self-help, microplastic filling, chemotherapy injection, etc.

[0046] The whole device also includes structures such as a seat 9, a shaft 5 and a positioning member, which are elaborated in detail below:

[0047] In the first aspect, regarding the seat 9, one end of the seat 9 is connected to the sealing plug 8. The seat 9 serves as a framework support structure. One end of it is embedded inside the sealing plug 8 and fixedly connected to the sealing plug 8. The seat 9 can improve the overall strength. The cross-sectional shape of the overall structure of the seat 9 is "convex". A limiting groove is arranged on the seat 9, and the limiting groove is opened along the circumferential edge of the seat 9.

[0048] In the second aspect, regarding the shaft 5, one end of the shaft 5 is detachably connected to the other end of the seat 9. The detachable connection methods include but are not limited to threaded connection, clamping connection, etc. As a feasible embodiment, in this solution, an internal threaded hole is arranged on the seat 9, and one end of the shaft 5 has an external thread, and the external thread can be threadedly connected with the internal threaded hole to realize the connection and cooperation between the shaft 5 and the seat 9 by using threaded connection. In this solution, the shaft 5 is designed as a detachable structure, which can be a clamping connection or a threaded connection, etc. In this way, the overall length is reduced, the occupied space is small, it is convenient for assembly and carrying, and the probability of the shaft 5 being accidentally squeezed is reduced.

[0049] In the third aspect, regarding the positioning member, it is detachably connected to the boss 41. The positioning member can be clamped with the limiting groove to realize the positioning of the seat 9 and prevent the seat 9 from moving back and forth. The positioning member is a positioning plate 12. One end of the positioning plate 12 is clamped with the limiting groove 10, and the other end of the positioning plate 12 is thermally adhered to the boss 41. The overall shape of the positioning plate 12 can be "匚"-shaped. There is a break tear line at the connection between the positioning plate 12 and the boss 41, forming a tearable structure. When in use, just gently pull one end of the positioning plate 12, the positioning plate 12 is torn off from the boss 41, and then one end of the positioning plate 12 is removed from the limiting groove 10. The operation is convenient, and the limit can be released only by gently pulling and tearing.

[0050] By designing a positioning piece and configuring an adaptable limiting groove 10, after filling the medicine, the positioning piece is used to position the plug seat 9, that is, the sealing plug 8, to prevent the sealing plug 8 from moving forward and backward, so as to prevent the sealing plug 8 from falling out and causing the medicine to flow out, thereby improving safety in use.

[0051] In this embodiment, the specifications of the cylinder 4 can be made into various types. In this embodiment, the medicine can be anhydrous ethanol, which is used for PEI treatment. PEI therapy refers to anhydrous alcohol (ethanol) intratumoral injection therapy (PEI), such as for liver cancer, lung cyst treatment, etc. The filled anhydrous ethanol has various volume models, such as 1ml, 2ml, 3ml, 4ml, 5ml, 6ml, etc. When performing PEI operation, the amount of anhydrous ethanol injected depends on the size, density, location, patient tolerance and follow-up of the tumor, etc., and can also be calculated according to the formula V=4 / 3π(R+0.5) 3 Calculation, where V represents the total amount of ethanol required (ml), R is the radius of the tumor (cm), and 0.5 is a correction number to ensure that the surrounding tissue of the tumor is infiltrated with anhydrous ethanol. In order to prevent the occurrence of serious complications, the dosage range of anhydrous ethanol injected during a one-time treatment is generally 2 to 8 ml. In the utility model, a variety of specifications are designed, which can be freely matched to obtain the required total injection amount.

[0052] Embodiment 2:

[0053] Continue to refer to the attached Figure 1 - Fig.10 , the other structures are the same as those of the first embodiment, except that the connection between the plug seat 9 and the plug shaft 5 in this embodiment is not threaded connection, but a clamping connection, as follows:

[0054] At least two groups of elastic hooks 11 are provided on the plug seat 9. In this embodiment, three groups can be provided, which are evenly arranged along the circumference. The cross-sectional shape of the hooks 11 is similar to the shape of "7". One end of the plug seat 9 is connected to the end cap 6. The end cap 6 is a hollow structure. A slot 61 is provided on the inner wall of the end cap 6. The hook 11 can extend into the end cap 6 and fit in the slot 61. The hook 11 is elastic and can achieve a certain deformation. When the end cap 6 is connected to the hook 11, the end cap 6 can make the hook 11 shrink inward and move smoothly along the end cap 6. When the hook 11 reaches the slot 61, the hook 11 is engaged with the slot 61 under the action of its own elastic force.

[0055] For the convenience of operation, the inner wall of the end cap 6 has an inclined portion 62, and a card platform structure is formed between the inclined portion 62 and the card slot 61; the inclined portion 62 extends from one end of the end cap 6 toward the card slot 61, and when in use, the inclined portion 62 can cause the hook 11 to retract inward. By utilizing the retraction and guidance of the inclined portion 62, the plug shaft 5 and the plug seat 9 can be quickly connected.

[0056] In this embodiment, the hook 11 and the end cap 6 are both made of plastic material.

[0057] Embodiment three:

[0058] Continue to refer to the attached Figure 1 - Fig.10 On the basis of the first or second embodiment, an outer sleeve 13 is further provided at the nipple 7, one end of the outer sleeve 13 is fixedly connected to the barrel 4; an inner sleeve 14 is provided inside the outer sleeve 13, one end of the inner sleeve 14 has an edge 141, and the edge 141 can be adapted and snap-fitted with the flange 21 at the needle cap 2 of the puncture needle 1; the inner sleeve 14 and the outer sleeve 13 are threadedly connected. When in use, the inner sleeve 14 is pre-set on the puncture needle 1, and the inner sleeve 14 is positioned at the needle cap 2; after the nipple 7 and the needle cap 2 are assembled and plugged, the inner sleeve 14 is screwed, and the inner sleeve 14 is threadedly connected to the outer sleeve 13, and the flange 21 of the needle cap 2 can be positioned by using the edge 141, which effectively prevents the needle cap 2 from falling off the needle, and effectively prevents the occurrence of splashing when the connection is not tight enough during pressurized injection.

[0059] In order to facilitate the insertion, the length of the outer sleeve 13 is smaller than the length of the nipple 7, which is conducive to the assembly connection between the needle cap 2 and the nipple 7.

[0060] In this embodiment, scale lines are arranged on the outer wall of the cylinder 4, and the staff can conveniently check the dosage of anhydrous ethanol according to the scale lines.

[0061] Application results:

[0062] By providing the outer sleeve 13 and the inner sleeve 14 and utilizing the cooperation between the inner sleeve 14 and the outer sleeve 13, the needle cap 2 can be locked and positioned to ensure a reliable connection between the needle cap 2 and the nipple 7. Manual gripping is no longer required, thus freeing both hands and making it easier for medical staff to perform injection operations.

[0063] It should be noted that the needle cap 2 can be the needle cap of the puncture needle 1 or the needle cap of an ordinary needle.

[0064] The whole device also includes an outer packaging bag 3, and the cylinder 4, the sealing plug 8, the plug shaft 5, the plug seat 9 and the positioning piece are all sealed in the outer packaging bag 3, and the outer packaging is a sterile environment. By pre-loading anhydrous ethanol in the cylinder 4 in advance, there is no need to perform operations such as pipetting. When in use, the outer packaging bag 3 can be torn open for direct use, and the aseptic principle in the operation is more strictly implemented. This device is a disposable medical product, clean and hygienic, and easy to operate; by setting different specifications, it can meet different usage needs and has few limitations.

[0065] Application scenario 1: Taking PEI operation as an example, the application method of this device is introduced:

[0066] ① Selection of puncture position and puncture point

[0067] Choose the appropriate puncture position and puncture point. Generally, when puncturing tumors in the left lobe and part of the right anterior lobe of the liver, the patient should lie in the supine position; when puncturing tumors in the right posterior lobe and part of the right anterior lobe of the liver, the patient should lie in the right anterior oblique position or the left side lying position. For small liver cancers and large liver cancers that are receiving injection treatment for the first time, the puncture point should be selected in the central area of the tumor, or injection should be made in quadrants each time to avoid uneven drug injection affecting the efficacy.

[0068] ② Local disinfection and anesthesia

[0069] The disinfection range should include the entire liver surface projection area, so as to facilitate multi-point and multi-intercostal puncture injection of the tumor. After laying the drape, use lidocaine or procaine to infiltrate the subcutaneous tissue under the puncture point for anesthesia, and the depth should reach the liver capsule; the angle of local anesthesia should be consistent with the direction of puncture needle insertion.

[0070] ③Punch and injection of anhydrous ethanol

[0071] Tear open the outer packaging bag 3, put the inner sleeve 14 on the puncture needle 1 in advance, and position it at the needle cap 2; connect the plug shaft 5 and the plug seat 9 as a whole, and place them on the sterile table for standby use. The corresponding intercostal space where the tumor is located should be selected for needle insertion, and the intercostal space should be fully opened to facilitate needle insertion and obtain clear images. The needle tip passes through normal liver tissue to reach the tumor, and the depth of needle insertion should be strictly controlled to avoid large blood vessels as much as possible, so as to reduce or avoid the occurrence of complications.

[0072] When the needle tip reaches the predetermined puncture point, the needle core of the puncture needle 1 is pulled out, the sealing cover 71 and the positioning plate 12 are torn off, the nipple 7 of the barrel 4 is connected to the needle cap 2 of the puncture needle 1, and the injection of anhydrous ethanol is started.

[0073] Application scenario 2: The utility model is applied to chemotherapy injection or immune injection:

[0074] Take chemotherapy injection as an example: most chemotherapy drugs are injectable, such as Kanglaite injection, carboplatin injection, etc. This syringe can be used when injecting chemical drugs. When using this device, a specific dose of chemotherapy drugs is pre-filled in the cylinder to form a set, which is convenient for medical staff to quickly and accurately administer drugs during treatment.

[0075] Directions:

[0076] 1) Check the syringe: Confirm that the drug name, concentration and dosage on the syringe are correct, and check whether the syringe is damaged.

[0077] 2) Disinfect the injection site: Use alcohol cotton balls or disinfectant to thoroughly clean the patient's injection site.

[0078] 3) Assemble the syringe: If the syringe needs to be connected to an infusion tube or other equipment, connect it according to the instructions.

[0079] 4) Injection of medication: Slowly inject the medication into the patient's body according to the doctor's instructions.

[0080] 5) Waste disposal: After the injection is completed, properly dispose of the used syringe and other related items in accordance with medical waste disposal regulations.

[0081] advantage:

[0082] 1. Accurate dosage: The drug dosage has been precisely measured, reducing the possible errors when manually drawing the drug.

[0083] 2. Easy to use: Medical staff no longer need to manually draw drugs, they only need to connect the infusion tube or other equipment for injection, saving time and energy.

[0084] 3. Reduce the risk of contamination: Since the drug is pre-filled in the syringe, the chance of the drug being exposed to the external environment is reduced, thereby reducing the risk of contamination.

[0085] 4. Improve safety: Reduce the chance of medical staff being exposed to chemotherapy drugs and reduce the risk of occupational exposure.

[0086] Although the specific implementation methods of the utility model are described above in conjunction with the accompanying drawings, this does not limit the scope of protection of the utility model. On the basis of the technical solution of the utility model, various modifications or deformations that can be made by technical personnel in this field without creative work are still within the scope of protection of the utility model.

Claims

1. A split pre-filled syringe, comprising: A barrel (4), wherein one end of the barrel (4) has a nipple (7), and the other end of the barrel has a boss (41) for convenient finger gripping; A sealing plug (8) is disposed in the barrel (4) and is capable of sliding along the barrel (4); a storage space is formed in the area between the sealing plug (8) and the nipple (7); Features: The storage space is filled with medicine; one end of the nipple (7) is connected to a detachable cover (71); the cover (71) and the sealing plug (8) seal the medicine in the cylinder (4); and further comprising: A plug seat (9), one end of the plug seat (9) being connected to the sealing plug (8); a limiting groove (10) is provided on the plug seat (9); A plug shaft (5), one end of the plug shaft (5) being detachably connected to the other end of the plug seat (9); A positioning member is detachably connected to the boss (41), and the positioning member can be adapted to be snap-fitted with the limiting groove (10).

2. A split prefilled syringe according to claim 1, characterized in that: The plug seat (9) is provided with an internal threaded hole, and one end of the plug shaft (5) has an external thread, and the external thread can be threadedly connected with the internal threaded hole.

3. A split prefilled syringe according to claim 1, characterized in that: At least two groups of elastic hooks (11) are provided on the plug seat (9); one end of the plug seat (9) is connected to an end cap (6); the end cap (6) is a hollow structure; a slot (61) is provided on the inner wall of the end cap (6); the hook (11) can extend into the end cap (6) and be adapted to engage with the slot (61).

4. A split prefilled syringe according to claim 3, characterized in that: The inner wall of the end cap (6) has an oblique portion (62), and a card platform structure is formed between the oblique portion (62) and the card slot (61); the oblique portion (62) extends from one end of the end cap (6) in the direction of the card slot (61), and when in use, the oblique portion (62) can cause the card hook (11) to retract inwardly.

5. A split pre-filled syringe according to claim 1, characterized in that: The positioning member is a positioning plate (12), one end of the positioning plate (12) is adapted to be snap-fitted to the limiting groove (10), the other end of the positioning plate (12) is thermally bonded to the boss (41), and a breakpoint tear line is provided at the connection between the positioning plate (12) and the boss (41), forming a tearable structure.

6. A split prefilled syringe according to claim 1, characterized in that: It also comprises a puncture needle (1), the puncture needle (1) being connected to the nipple (7); an outer sleeve (13) being sleeved on the nipple (7), one end of the outer sleeve (13) being fixedly connected to the cylinder body (4); an inner sleeve (14) being sleeved inside the outer sleeve (13), one end of the inner sleeve (14) having an edge (141), the edge (141) being adaptable and snap-fitted with a flange (21) on the needle cap (2) of the puncture needle (1); the inner sleeve (14) and the outer sleeve (13) being threadedly connected.

7. A split pre-filled syringe according to claim 6, characterized in that: The length of the outer sleeve (13) is smaller than the length of the nipple (7).

8. A split pre-filled syringe according to claim 1, characterized in that: The outer wall of the cylinder (4) is provided with scale lines.

9. A split pre-filled syringe according to claim 4, characterized in that: The hook (11) and the end cap (6) are both made of plastic material.

10. A split pre-filled syringe according to claim 1, characterized in that: It also comprises an outer packaging bag (3), wherein the cylinder (4), the sealing plug (8), the plug shaft (5), the plug seat (9) and the positioning piece are all sealed in the outer packaging bag (3).

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