Pre-filled local sealing needle

Abstract

The utility model provides a pre-filling type local sealing needle which comprises an injector, a liquid storage structure and a needle head structure, the injector comprises a needle cylinder, a piston arranged in the needle cylinder in a sliding mode and a piston rod fixedly connected with the piston, and the end, facing the injection direction, of the piston protrudes to form a sharp needle; the liquid storage structure comprises a premixing connector and a premixing bag fixedly connected with the premixing connector, and the premixing bag is provided with a plurality of independent bag bodies in a hot pressing mode through heat sealing lines. The needle head structure comprises a needle sleeve and a needle head fixedly arranged at the end of the needle sleeve and used for injection. The injection end of the needle cylinder is selectively connected with the premixing connector or the needle sleeve in a matched mode through a detachable connecting structure. The needle cylinder is connected with the premixing connector in a matched mode, the premixing bag is punctured through the sharp needle to extract mixed liquid medicine, then the needle cylinder switches the needle sleeve to conduct liquid medicine injection, the purpose of direct injection through mixed suction of the liquid medicine is achieved, the process of mixed suction and injection of the liquid medicine is simplified, and working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a prefilled local sealing needle. Background Art

[0002] Local blockade therapy is an important and commonly used method for emergency treatment of chemotherapy extravasation. When chemotherapy drugs extravasate, the injection should be stopped immediately, and the needle should be retained to withdraw the residual drugs to minimize damage. Next, a mixed solution of 5ml of 0.9% sodium chloride, 5ml of lidocaine, and 5mg of dexamethasone should be used to perform a circular blockade on the affected area, ensuring that it is performed once every 12 hours for three days. After that, the blockade frequency is adjusted according to the local swelling until the swelling completely subsides. During this period, Jinhuangsan or 50% magnesium sulfate can be used for external application, and the affected limb can be raised to relieve symptoms.

[0003] However, existing local sealing drugs have many inconveniences during use. The drug collection, preparation and dissolution process takes a long time, resulting in a waste of precious treatment time. In addition, the preparation process is complicated and prone to operational errors, and the timeliness, accuracy and adequacy of local sealing cannot be guaranteed, which undoubtedly limits the effectiveness of treatment. Utility Model Content

[0004] Based on this, the purpose of the present invention is to provide a prefilled partial sealing needle to solve the technical problems mentioned in the above background technology.

[0005] The utility model provides a prefilled local sealing needle, comprising:

[0006] A syringe, the syringe comprising a syringe barrel, a piston slidably disposed in the syringe barrel, and a plug rod fixedly connected to the piston, wherein one end of the piston protrudes toward the injection direction to form a sharp needle;

[0007] A liquid storage structure, the liquid storage structure comprising a premixing joint and a premixing bag fixedly connected to the premixing joint, the premixing bag being formed into a plurality of capsules independently arranged by heat-sealing lines and hot-pressing;

[0008] A needle structure, the needle structure comprising a needle sleeve and a needle fixed to the end of the needle sleeve for injection;

[0009] Among them, the injection end of the syringe is selectively connected to the premix connector or the needle sleeve through a detachable connection structure. When in use, the syringe is connected to the premix connector, and the premix bag is pierced by the sharp needle to extract the mixed medicine solution, and then the syringe is switched to connect to the needle sleeve for injection of the medicine solution.

[0010] Furthermore, the prefilled partial closure needle, wherein the detachable connection structure includes an external thread provided on the outer wall of the syringe, and an internal thread provided on the inner wall of the premixing connector and the needle sleeve, the external thread cooperates with the internal thread to realize the assembly between the syringe and the premixing connector, or the assembly between the syringe and the needle sleeve.

[0011] Furthermore, in the prefilled partially sealed needle, the premix connector is provided with an opening aligned with the central axis of the syringe, and the premix bag is hot-melt fixed at the opening.

[0012] Furthermore, in the prefilled partially sealed needle, the premix bag is in the shape of an elongated strip, and a plurality of the capsules are arranged at intervals along the length direction of the premix bag.

[0013] Furthermore, in the prefilled partially sealed needle, at least one of the capsules is an air storage capsule, and the remaining capsules are liquid storage capsules.

[0014] Furthermore, in the prefilled partially sealed needle, four capsules are arranged at intervals along the length direction of the premix bag, wherein the capsule away from one end of the premix connector is an air storage capsule, and the remaining capsules are liquid storage capsules.

[0015] Furthermore, in the prefilled partially sealed needle, a sealing rubber ring is provided on the periphery of the piston, and the outer surface of the sealing rubber ring contacts the inner surface of the syringe.

[0016] Furthermore, in the prefilled partially sealed needle, a limiting convex ring is integrally formed on the inner side surface of the sealing rubber ring, a limiting groove is provided on the peripheral surface of the piston, and the limiting convex ring and the limiting groove are matched in a concave-convex manner, thereby realizing the integrated assembly of the sealing rubber ring and the piston.

[0017] Furthermore, in the prefilled partially sealed needle, annular ribs are respectively provided at two axial ends of the sealing rubber ring, and the two annular ribs abut against the end surface of the piston in the axial direction.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] 1. The premixing connector is connected by a syringe, and the premixing bag is pierced by the sharp needle to extract the mixed liquid medicine, and then the syringe switches the needle sleeve to inject the liquid medicine, thereby achieving the purpose of directly injecting the mixed liquid medicine by suction, simplifying the process of mixing the liquid medicine by suction and injection, and improving work efficiency.

[0020] 2. The premixed bag is formed into several independently arranged capsules through heat-sealing lines, which realizes the quantitative storage of different liquid medicines. When mixing liquid medicines, you only need to squeeze the premixed bag, and the heat-sealing lines will open immediately, so that the liquid medicines in each capsule can be quantitatively mixed and prepared. This is not only efficient and convenient, but also effectively avoids the errors that may occur during the manual preparation process, ensuring the accuracy and reliability of liquid medicine mixing. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the prefilled partial sealing needle in the utility model;

[0022] Figure 2 It is an assembly diagram of the syringe and the liquid storage structure in the utility model;

[0023] Figure 3 It is a cross-sectional view of the syringe and the liquid storage structure in the utility model in the assembled state;

[0024] Figure 4 for Figure 3 A partial enlarged schematic diagram of position A in the middle;

[0025] Figure 5 It is an assembly diagram of the syringe and needle structure in the utility model;

[0026] Figure 6 It is a cross-sectional view of the syringe and needle structure of the utility model in the assembled state;

[0027] Description of main component symbols:

[0028] 1. Syringe; 2. Piston; 3. Stopper rod; 4. Sealing rubber ring; 5. Limiting convex ring; 6. Limiting groove; 7. Sharp needle; 8. Premix bag; 81. Liquid storage capsule; 82. Air storage bag; 9. Premix connector; 10. Needle sleeve; 11. Needle; 12. Internal thread; 13. External thread; 51. Annular rib.

[0029] The following specific implementation manner will further illustrate the present utility model in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0030] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0031] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0033] See also Figures 1 to 6 The prefilled partially sealed needle of the utility model comprises a syringe, a liquid storage structure and a needle structure. The syringe comprises a syringe barrel 1, a piston 2 slidably arranged in the syringe barrel 1 and a plug rod 3 fixedly connected to the piston 2. One end of the piston 2 protrudes toward the injection direction to form a sharp needle 7.

[0034] The liquid storage structure includes a premixing joint 9 and a premixing bag 8 fixed to the premixing joint 9, wherein the premixing bag 8 is formed into a plurality of capsules independently arranged by heat-sealing lines and hot pressing;

[0035] The needle structure comprises a needle sleeve 10, and a needle 11 fixed to the end of the needle sleeve 10 for injection;

[0036] Among them, the injection end of the syringe 1 is selectively connected to the premix connector 9 or the needle sleeve 10 through a detachable connection structure. When in use, the syringe 1 is connected to the premix connector 9, and the premix bag 8 is pierced by the sharp needle 7 to extract the mixed medicine solution, and then the syringe 1 is switched to connect to the needle sleeve 10 for injection of the medicine solution.

[0037] The syringe 1 is connected to the premix connector 9, and the sharp needle 7 is used to pierce the premix bag 8 to extract the mixed liquid medicine. Then the syringe 1 switches the needle sleeve 10 to inject the liquid medicine, thereby achieving the purpose of directly injecting the mixed liquid medicine by suction, simplifying the process of mixed liquid medicine suction and injection, and improving work efficiency. Secondly, the premix bag 8 is formed into a number of capsules independently arranged by heat-sealing lines, thereby achieving quantitative storage of different liquid medicines. When mixing liquid medicines, it is only necessary to squeeze the premix bag 8, and the heat-sealing lines will open immediately, so that the liquid medicines in each capsule can be quantitatively mixed and prepared. This is not only efficient and convenient, but also effectively avoids the errors that may occur during the manual preparation process, ensuring the accuracy and reliability of liquid medicine mixing.

[0038] Specifically, Figure 1 , Figure 2 and Figure 5 As shown, the detachable connection structure includes an external thread 13 provided on the outer wall of the syringe 1, and an internal thread 12 provided on the inner walls of the premixing connector 9 and the needle sleeve 10, and the external thread 13 cooperates with the internal thread 12 to realize the assembly between the syringe 1 and the premixing connector 9, or the assembly between the syringe 1 and the needle sleeve 10.

[0039] Of course, in other embodiments, the internal thread 12 may also be provided on the inner wall of the syringe 1, while the external thread 13 is provided on the outer walls of the premixing connector 9 and the needle sleeve 10. This embodiment is only an example and not a limitation.

[0040] For details, see Figure 3 The premixing connector 9 is provided with an opening aligned with the central axis of the syringe 1, and the premixing bag 8 is fixed at the opening by heat melting. In practical applications, when the premixing connector 9 is threadedly connected to the syringe 1, the premixing bag 8 is squeezed to open the heat sealing line, so that the liquid medicines in each storage capsule can be mixed and prepared, and then the stopper rod 3 is pushed until the sharp needle 7 at the end of the piston 2 passes through the opening and pierces the premixing bag 8. At this time, the stopper rod 3 is pulled back to extract the mixed liquid medicine in the premixing bag 8 into the syringe 1.

[0041] It should be noted that after the mixed liquid medicine is drawn into the syringe 1 , when the premixing connector 9 is removed and the needle sleeve 10 is switched, the opening of the syringe 1 should face upward to prevent the liquid medicine from flowing out of the syringe 1 due to gravity.

[0042] Furthermore, the premix bag 8 is in a long strip shape, and a plurality of capsules are arranged at intervals along the length direction of the premix bag 8. In practical applications, medical staff can squeeze each capsule in turn along the length direction of the premix bag 8 to open the heat-sealed lines one by one, ensuring that different drug solutions can be quantitatively mixed and prepared in a predetermined order and proportion, greatly improving the standardization and accuracy of the operation.

[0043] For further information, see Figure 2 and Figure 3 At least one of the capsules is an air storage capsule 82, and the other capsules are liquid storage capsules 81. It can be understood that the air storage capsule 82 is filled with gas, and when squeezed by external force, the gas is more likely to generate a greater pressure than the liquid storage capsule, so that it is easier to break the heat seal line. Therefore, in actual application, medical staff can squeeze the air storage capsule 82 to break each heat seal line one by one by using air pressure to achieve rapid preparation of liquid medicine.

[0044] In this embodiment, four capsules are arranged at intervals along the length direction of the premix bag 8, wherein the capsule at one end away from the premix joint 9 is an air storage capsule 82, and the remaining capsules are liquid storage capsules 81. Of course, the number and arrangement positions of the air storage capsules 82 and liquid storage capsules 81 can be adjusted as needed, and this embodiment is only an example and not a limitation.

[0045] For further information, see Figure 4 The piston 2 is provided with a sealing rubber ring 4 at its periphery, and the outer surface of the sealing rubber ring 4 contacts the inner surface of the syringe 1. The sealing rubber ring 4 can fill the small gap between the piston 2 and the syringe 1 to prevent the leakage of the liquid medicine; on the other hand, since the sealing rubber ring 4 has certain elasticity and wear resistance, it can adapt to the reciprocating motion of the piston 2 in the syringe 1 and maintain a long-term sealing effect.

[0046] Specifically, the inner side of the sealing rubber ring 4 is integrally formed with a limiting convex ring 5, and the peripheral surface of the piston 2 is provided with a limiting groove 6, and the limiting convex ring 5 and the limiting groove 6 are matched with each other in a concave-convex manner, so as to realize the integrated assembly of the sealing rubber ring 4 and the piston 2. It can be understood that the design of the concave-convex matching makes it difficult for the sealing rubber ring 4 to fall off or shift, and even when the piston 2 reciprocates in the syringe 1, a stable sealing effect can be maintained.

[0047] Furthermore, annular ribs 51 are respectively provided at both axial ends of the sealing rubber ring 4 , and the two annular ribs 51 abut against the end surface of the piston 2 in the axial direction, which can further prevent the sealing rubber ring 4 from axial displacement or falling off during the movement of the piston 2 .

[0048] In summary, the prefilled partially sealed needle in the above-mentioned embodiment of the utility model is connected to the premix connector 9 through the syringe 1, and the premix bag 8 is pierced by the sharp needle 7 to extract the mixed liquid medicine, and then the syringe 1 switches the needle sleeve 10 to inject the liquid medicine, thereby achieving the purpose of directly injecting the mixed liquid medicine by suction, simplifying the process of mixing the liquid medicine by suction and injection, and improving work efficiency.

[0049] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0050] The above-mentioned embodiments only express several implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A prefilled partial sealing needle, characterized in that: include: A syringe, the syringe comprising a syringe barrel, a piston slidably disposed in the syringe barrel, and a plug rod fixedly connected to the piston, wherein one end of the piston protrudes toward the injection direction to form a sharp needle; A liquid storage structure, the liquid storage structure comprising a premixing joint and a premixing bag fixedly connected to the premixing joint, the premixing bag being formed into a plurality of capsules independently arranged by heat-sealing lines and hot-pressing; A needle structure, the needle structure comprising a needle sleeve and a needle fixed to the end of the needle sleeve for injection; Among them, the injection end of the syringe is selectively connected to the premix connector or the needle sleeve through a detachable connection structure. When in use, the syringe is connected to the premix connector, and the premix bag is pierced by the sharp needle to extract the mixed medicine solution, and then the syringe is switched to connect to the needle sleeve for injection of the medicine solution.

2. The prefilled partial sealing needle according to claim 1, characterized in that: The detachable connection structure includes an external thread provided on the outer wall of the syringe, and an internal thread provided on the inner walls of the premixing connector and the needle sleeve, and the external thread cooperates with the internal thread to realize the assembly between the syringe and the premixing connector, or the assembly between the syringe and the needle sleeve.

3. The prefilled partial sealing needle according to claim 1, characterized in that: The premixing joint is provided with an opening aligned with the central axis of the syringe, and the premixing bag is hot-melted and fixed at the opening.

4. The prefilled partial sealing needle according to claim 1, characterized in that: The premix bag is in the shape of a long strip, and a plurality of capsules are arranged at intervals along the length direction of the premix bag.

5. The prefilled partial sealing needle according to claim 4, characterized in that: At least one of the sacs is an air storage sac, and the remaining sacs are liquid storage sacs.

6. The prefilled partial sealing needle according to claim 5, characterized in that: Four bladders are arranged at intervals along the length direction of the premix bag, wherein the bladder at one end away from the premix joint is an air storage bladder, and the remaining bladders are liquid storage bladders.

7. The prefilled partial sealing needle according to claim 1, characterized in that: A sealing rubber ring is arranged on the periphery of the piston, and the outer surface of the sealing rubber ring contacts the inner surface of the syringe.

8. The prefilled partial sealing needle according to claim 7, characterized in that: A limiting convex ring is integrally formed on the inner side surface of the sealing rubber ring, a limiting groove is provided on the peripheral surface of the piston, and the limiting convex ring and the limiting groove are matched in a concave-convex manner, thereby realizing the integral assembly of the sealing rubber ring and the piston.

9. The prefilled partial sealing needle according to claim 7, characterized in that: Annular ribs are respectively arranged at two axial ends of the sealing rubber ring, and the two annular ribs abut against the end surface of the piston in the axial direction.

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