Pre-filled anticoagulant injector containing sodium citrate liquid

Abstract

The utility model discloses a pre-filled type anticoagulant injector containing sodium citrate liquid. Relates to the technical field of medical instruments and comprises a needle cylinder, an injection connector is arranged at the top of the needle cylinder, a liquid outlet hole is formed in the injection connector, and a limiting groove is formed in the inner side wall of the needle cylinder; the inner sleeve is arranged in the needle cylinder, a clamping block is arranged at the end, away from the needle cylinder, of the inner sleeve, a piston is arranged at the other end of the inner sleeve, a limiting protrusion is arranged on the side wall of the inner sleeve, and the limiting protrusion is matched with the limiting groove; the push rod is arranged in the inner sleeve, and a push handle is arranged at the end, away from the inner sleeve, of the push rod. The inner sleeve is arranged, the push rod is pushed into the inner sleeve, the push rod is prevented from being exposed out of the needle cylinder all the time, and the damage risk of the syringe is effectively reduced; the clamping block and the limiting piece are arranged to fix the push rod, the push rod is prevented from being separated from the inner sleeve before injection, and therefore the push rod is contained in the inner sleeve, and the risk that the injector is damaged can be effectively avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, and more particularly to a prefilled anticoagulant syringe containing sodium citrate liquid. Background Art

[0002] Sodium citrate is a sodium salt of an organic acid. It appears as white to colorless crystals with a cool, salty taste and is stable in air. Its chemical formula is C6H5Na3O7. It is soluble in water but poorly soluble in ethanol. Its aqueous solution is slightly alkaline and is commonly used as a buffer, chelating agent, and bacterial culture medium. It is also used in medicine as a diuretic, expectorant, and anticoagulant. It is also used in food, beverages, electroplating, and photography. Sodium citrate can prevent blood clotting. Citrate ions react with calcium ions in the blood to form a soluble complex, calcium citrate, which is difficult to dissociate. This complex is readily soluble in water but difficult to dissociate, reducing calcium ions in the blood and inhibiting the coagulation process, thereby preventing blood clotting.

[0003] Prefilled syringes are commonly used medical devices. They typically consist of a barrel, piston, cap, and push rod. The piston and push rod are attached to each other within the barrel. Pushing the push rod, in turn, pushes the piston, pushing the solution prefilled in the barrel out of the syringe. Prefilled syringes are suitable for sealing indwelling catheters or needles between medications.

[0004] After the existing prefilled syringes are filled with medicine, most of the push rod is exposed outside the sleeve, which is easy to break during use, causing damage to the syringe; during the transportation of prefilled syringes or when medical personnel are using them, the push rod may be pushed in or pulled out of the syringe body due to external force, which will cause waste of the medicine in the prefilled syringe, causing unnecessary damage and significantly increasing the breakage rate during transportation or use; existing prefilled syringes all use a smooth push method, which requires pushing and stopping to form a vortex in the catheter, which requires high manual proficiency and is difficult to operate.

[0005] Therefore, how to provide a prefilled anticoagulant syringe containing sodium citrate liquid that can protect the push rod, is not easily damaged, can fix the push rod during transportation, and reduces the difficulty of operation is a problem that technicians in this field urgently need to solve. Utility Model Content

[0006] In view of this, the utility model provides a prefilled anticoagulant syringe containing sodium citrate liquid, which can protect the push rod and is not easily damaged. The push rod can be fixed during transportation and the operation difficulty is reduced.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] A prefilled anticoagulant syringe containing sodium citrate liquid, comprising:

[0009] A syringe, wherein an injection joint is provided on the top of the syringe, a liquid outlet is provided on the injection joint, and a limiting groove is provided on the inner side wall of the syringe;

[0010] An inner sleeve, the inner sleeve is arranged in the syringe, a clamping block is provided at one end of the inner sleeve away from the syringe, a piston is provided at the other end of the inner sleeve, and a limiting protrusion is provided on the side wall of the inner sleeve, and the limiting protrusion is adapted to the limiting groove;

[0011] A push rod is arranged in the inner sleeve, and a push handle is provided at one end of the push rod away from the inner sleeve.

[0012] Furthermore, the push rod is provided with two parts, the two parts of the push rod are connected by a connecting rod, two limit members are provided between the two parts of the push rod, the two limit members are located on both sides of the connecting rod, and the two limit members are away from one end of the connecting rod and extend beyond the side walls of the two push rods.

[0013] Furthermore, the limiting member is an elastic member, and the limiting member is adapted to the clamping block.

[0014] Furthermore, it also includes a cap, which is arranged on the injection connector, and a sealing gasket is arranged inside the cap, and the sealing gasket is in contact with the liquid outlet.

[0015] Furthermore, a plurality of the limiting grooves and the limiting protrusions are provided, the plurality of limiting grooves are provided at intervals on the inner side wall of the syringe, and the plurality of limiting protrusions are provided at intervals on the side wall of the inner sleeve.

[0016] It can be seen from the above technical solution that compared with the prior art, the utility model discloses a prefilled anticoagulant syringe containing sodium citrate liquid. By setting an inner sleeve and pushing the push rod into the inner sleeve, the push rod is prevented from being exposed to the outside of the syringe all the time, thereby effectively reducing the risk of syringe damage; a limiting protrusion is provided on the side wall of the inner sleeve, and a limiting groove is provided on the inner side wall of the syringe, and the protrusion is limited in the limiting groove to seal the medicine liquid in the syringe; the limiting protrusion and the limiting groove are arranged at intervals to achieve smooth pushing and stopping, and the operator does not need to control the force by himself, and a vortex can be generated at the target position to improve the cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0018] Figure 1 This is a schematic structural diagram of a prefilled anticoagulant syringe containing sodium citrate liquid provided by the present invention;

[0019] Figure 2 A schematic diagram of the structure of the push rod movement provided by the utility model;

[0020] Figure 3 This is a structural diagram of the movement of the inner sleeve provided by the utility model.

[0021] Among them: 1 is the syringe; 2 is the injection connector; 3 is the liquid outlet; 4 is the limiting groove; 5 is the inner sleeve; 6 is the clamping block; 7 is the piston; 8 is the limiting protrusion; 9 is the push rod; 10 is the push handle; 11 is the connecting rod; 12 is the limiting part; 13 is the cap; 14 is the sealing gasket; 15 is the snap ring. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] See also Figure 1-3 The present invention discloses a prefilled anticoagulant syringe containing sodium citrate liquid, comprising:

[0024] A syringe 1, an injection connector 2 is provided on the top of the syringe 1, a liquid outlet 3 is provided on the injection connector 2, and a limiting groove 4 is provided on the inner side wall of the syringe 1;

[0025] The inner sleeve 5 is arranged in the syringe 1, and a block 6 is provided at one end of the inner sleeve 5 away from the syringe 1, and a piston 7 is provided at the other end of the inner sleeve 5. The side wall of the inner sleeve 5 is provided with a limiting protrusion 8, and the limiting protrusion 8 is adapted to the limiting groove 4; the push rod 9 is pushed into the inner sleeve 5 to prevent the push rod 9 from being exposed to the outside of the syringe 1 all the time, effectively reducing the risk of damage to the syringe; by setting the protrusion to be limited in the limiting groove 4, the liquid medicine is sealed in the syringe 1; the limiting protrusion 8 and the limiting groove 4 are arranged at intervals to achieve pushing and stopping in a smooth propulsion mode, and an eddy current can be generated at the target position without the operator having to control the force by himself, thereby improving the cleaning effect;

[0026] The push rod 9 is arranged in the inner sleeve 5. A push handle 10 is provided at one end of the push rod 9 away from the inner sleeve 5. The push handle 10 is provided to facilitate injection.

[0027] In this embodiment, the push rod 9 is provided with two parts, and the two parts of the push rod 9 are connected by a connecting rod 11. Two limit members 12 are provided between the two parts of the push rod 9. The two limit members 12 are located on both sides of the connecting rod 11, and the two limit members 12 extend beyond the side walls of the two push rods 9 at one end away from the connecting rod 11; the connection between the limit members 12 and the two parts of the push rod 9 is elastic, so that the two limit members 12 can pass between the two clamping blocks 6, and the clamping blocks 6 and the limit members 12 fix the push rod 9.

[0028] In this embodiment, the limiter 12 is an elastic member, and the limiter 12 is adapted to the clamping block 6; by clamping the clamping block 6 and the limiter 12, the push rod 9 is prevented from detaching from the inner sleeve 5 before injection, thereby storing the push rod 9 in the inner sleeve 5, thereby solving the problem of the push rod 9 being exposed outside the sleeve and causing the push rod 9 to break, thereby effectively reducing the risk of damage to the syringe.

[0029] In this embodiment, a cap 13 is further included. The cap 13 is arranged on the injection connector 2. A sealing gasket 14 is provided inside the cap 13. The sealing gasket 14 contacts the liquid outlet 3. The cap 13 protects the injection connector 2, and the sealing gasket 14 can improve the sealing effect.

[0030] In this embodiment, multiple limiting grooves 4 and limiting protrusions 8 are provided, and multiple limiting grooves 4 are arranged at intervals on the inner wall of the syringe 1, and multiple limiting protrusions 8 are arranged at intervals on the side wall of the inner sleeve 5; the multiple limiting grooves 4 and limiting protrusions 8 arranged at intervals can achieve pushing and stopping in a smooth propulsion mode, without the need for the operator to control the force by himself, and the operation difficulty is reduced.

[0031] In addition, in this embodiment, a clamping ring 15 is provided at one end of the syringe 1 away from the injection connector 2 to assist in injection.

[0032] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Reference can be made to the common and similar parts between the various embodiments. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the method description.

[0033] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A prefilled anticoagulant syringe containing sodium citrate liquid, characterized in that: include: A syringe, wherein an injection joint is provided on the top of the syringe, a liquid outlet is provided on the injection joint, and a limiting groove is provided on the inner side wall of the syringe; An inner sleeve, the inner sleeve is arranged in the syringe, a clamping block is provided at one end of the inner sleeve away from the syringe, a piston is provided at the other end of the inner sleeve, and a limiting protrusion is provided on the side wall of the inner sleeve, and the limiting protrusion is adapted to the limiting groove; A push rod is arranged in the inner sleeve, and a push handle is provided at one end of the push rod away from the inner sleeve.

2. A prefilled anticoagulant syringe containing sodium citrate liquid according to claim 1, characterized in that: The push rod is provided with two parts, the two parts of the push rod are connected by a connecting rod, two limit members are provided between the two parts of the push rod, the two limit members are located on both sides of the connecting rod, and the two limit members are away from one end of the connecting rod and extend beyond the side walls of the two push rods.

3. A prefilled anticoagulant syringe containing sodium citrate liquid according to claim 2, characterized in that: The limiting member is an elastic member, and the limiting member is adapted to the clamping block.

4. The prefilled anticoagulant syringe containing sodium citrate liquid according to claim 1, characterized in that: It also includes a cap, which is arranged on the injection connector. A sealing gasket is arranged inside the cap, and the sealing gasket is in contact with the liquid outlet.

5. The prefilled anticoagulant syringe containing sodium citrate liquid according to claim 1, characterized in that: A plurality of the limiting grooves and the limiting protrusions are provided, wherein the plurality of limiting grooves are arranged at intervals on the inner side wall of the syringe, and the plurality of limiting protrusions are arranged at intervals on the side wall of the inner sleeve.

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