Prefilled catheter pulse injector

Abstract

The utility model relates to pulse injector technical field especially pre -filled catheter pulse injector. It includes injection needle cylinder and push rod, and push rod surface has a plurality of edges along the length direction, a plurality of convex elastic teeth are arranged on the plurality of edges along the length direction, the injection needle cylinder inner chamber sets up the blocking structure, and the blocking structure is located at the tail end of injection needle cylinder, the blocking structure can form the resistance to the elastic tooth contacted, and the elastic tooth can deform downward under the blocking of the blocking ring, the front end of injection needle cylinder has the liquid outlet, and the bottom end face of liquid outlet sets up the convex spiral thread structure along the circumferential direction, and the spiral thread structure can let liquid form vortex flow. The utility model increases the spiral thread structure at the liquid outlet, can let the liquid at the liquid outlet form vortex flow, reduces the pipeline blockage probability.

Description

Technical Field

[0001] This utility model relates to the field of pulse injector technology, and in particular to a pre-filled catheter pulse injector. Background Technology

[0002] Intravenous catheterization is widely used in clinical practice, such as indwelling intravenous needles and PICC lines. Locking the catheter is a crucial step in its successful application, and the locking solution is key to maintaining catheter patency. Pre-filled catheter flushing devices, as a new type of locking solution, can replace traditional locking solutions such as normal saline and heparin diluent.

[0003] Currently, pre-filled catheter flushing devices on the market require medical staff to perform flushing and sealing manually, which demands a high level of skill from medical personnel. Improper operation can easily cause blockages, resulting in inconvenience. Summary of the Invention

[0004] This application addresses the shortcomings of the existing production technology by providing a pre-filled catheter pulse injector, which adds a spiral textured structure at the liquid outlet to create a vortex in the liquid at the outlet, thereby reducing the probability of pipeline blockage.

[0005] The technical solution adopted in this utility model is as follows: A pre-filled catheter pulse injector includes an injection syringe and a plunger. A piston is located at one end of the plunger, which is sealed within the inner cavity of the injection syringe and can slide back and forth along the inner cavity. The plunger surface has multiple edges along its length, and multiple protruding elastic teeth are provided on these edges along their length. A blocking structure is provided within the inner cavity of the injection syringe, located at the tail end of the syringe. The blocking structure provides resistance to the contacting elastic teeth, which deform downwards under the blocking ring, allowing them to pass through the protruding blocking ring and enter the inner cavity of the injection syringe. The front end of the injection syringe has a liquid outlet, and the bottom surface of the outlet has a protruding spiral pattern along its circumference, which allows the liquid to form a vortex.

[0006] Furthermore, the tips of the elastic teeth face the tail of the push rod and are set at an upward angle.

[0007] Furthermore, a flat tooth is provided between the elastic teeth, the height of which is smaller than that of the elastic teeth, and there is a gap between the flat tooth and the blocking structure.

[0008] Furthermore, each elastic tooth has grooves on both the front and back, allowing the elastic tooth to deform into the grooves when compressed.

[0009] Furthermore, multiple reinforcing plates are arranged laterally between two adjacent edges, and the multiple reinforcing plates are distributed at equal intervals along the length direction.

[0010] Furthermore, the blocking structure includes two blocking rings protruding from the inner wall surface of the syringe cavity, with the two blocking rings distributed along the same circumferential direction.

[0011] The beneficial effects of this utility model are as follows: This invention adds a spiral pattern to the outlet, which allows the liquid at the outlet to form a vortex, reducing the probability of pipeline blockage. The elastic teeth and blocking ring of this invention work together to achieve pulse injection, maintaining the stability and smoothness of the injection and avoiding the influence of human factors on the injection. Attached Figure Description

[0012] Figure 1 This is a perspective view of the present utility model.

[0013] Figure 2 This is a perspective view of the push rod of this utility model.

[0014] Figure 3 This is a three-dimensional view of the injection syringe of this utility model.

[0015] The components include: 1. Injection syringe; 2. Push rod; 3. Piston; 4. Edge; 5. Elastic tooth; 6. Flat tooth; 7. Tooth groove; 8. Reinforcing plate; 9. Blocking ring; 10. Spiral texture structure. Detailed Implementation

[0016] The specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0017] like Figure 1 and Figure 2 As shown, the pre-filled catheter pulse injector includes an injection syringe 1 and a push rod 2. A piston 3 is provided at one end of the push rod 2. The piston 3 is made of rubber material and can be sealed in the inner cavity of the injection syringe 1 and can slide back and forth along the inner cavity of the injection syringe 1.

[0018] like Figure 2 As shown, the push rod 2 has four edges 4 along its length, which are equidistantly distributed along the circumference. Multiple protruding elastic teeth 5 are provided on the four edges 4 along their length, with the tips of the elastic teeth 5 facing the tail of the push rod 2 and inclined upwards. The number of elastic teeth 5 and the spacing between them are related to the pulse frequency and the flushing volume.

[0019] like Figure 3As shown, the inner cavity of the injection syringe 1 is provided with two protruding blocking rings 9. The two blocking rings 9 are distributed along the same circumferential direction and are located at the tail end of the injection syringe 1. The two blocking rings 9 can create resistance to the contacting elastic teeth 5. When the push rod 2 is pushed, the elastic teeth 5 can deform downward under the obstruction of the blocking rings 9, so that the elastic teeth 5 can enter the inner cavity of the injection syringe 1 through the protruding blocking rings 9, thus forming a pulse injection effect.

[0020] like Figure 2 As shown, a flat tooth 6 is provided between two adjacent elastic teeth 5. The height of the flat tooth 6 is smaller than that of the elastic tooth 5. There is a gap between the flat tooth 6 and the blocking ring 9, so that the flat tooth 6 can pass through the blocking ring 9 without obstruction. The flat tooth 6 extends the stroke of each pulse.

[0021] like Figure 2 As shown, each elastic tooth 5 has a tooth groove 7 on both the front and back. When the elastic tooth 5 is compressed, it can deform into the tooth groove 7 to avoid the elastic tooth 5 getting stuck after being compressed.

[0022] like Figure 2 As shown, multiple reinforcing plates 8 are arranged laterally between two adjacent edges 4. The multiple reinforcing plates 8 are equidistantly distributed along the length direction, thereby improving the structural strength of the push rod 2.

[0023] like Figure 3 As shown, the front end of the injection syringe 1 has a liquid outlet, and a protruding spiral pattern structure 10 is provided on the bottom surface of the liquid outlet along the circumferential direction. When the liquid in the injection syringe 1 enters the liquid outlet, the spiral pattern structure 10 can make the liquid form a vortex, reducing the probability of the liquid outlet being blocked.

[0024] The working principle of this invention is as follows: During use, the syringe 1 is pre-filled with injection liquid. The operator applies an external force to the push rod 2. Under the action of the external force, the elastic teeth 5 can overcome the obstruction of the blocking ring 9 and enter the inner cavity of the syringe 1. Each advancement of the elastic teeth 5 achieves a pulse injection, thus enabling this invention to have the function of pulse injection, maintaining injection stability and avoiding the influence of human factors. The spiral textured structure 10 of the liquid outlet of this invention can create a vortex in the liquid inside the syringe 1, reducing the probability of tubing blockage.

[0025] The above description is an explanation of the present utility model and not a limitation thereof. The scope of the present utility model is defined by the claims. Within the protection scope of the present utility model, any form of modification may be made.

Claims

1. A pre-filled catheter pulse injector, comprising an injection syringe (1) and a plunger (2), characterized in that: A piston (3) is provided at one end of the push rod (2). The piston (3) can be sealed and connected in the inner cavity of the injection syringe (1) and can slide back and forth along the inner cavity of the injection syringe (1). The surface of the push rod (2) has multiple edges (4) along the length direction. Multiple protruding elastic teeth (5) are provided on the multiple edges (4) along the length direction. A blocking structure is provided in the inner cavity of the injection syringe (1). The blocking structure is located at the tail end of the injection syringe (1). The blocking structure can form resistance to the contacted elastic teeth (5). The elastic teeth (5) can deform downward under the blocking ring (9), so that the elastic teeth (5) can enter the inner cavity of the injection syringe (1) through the protruding blocking ring (9). The front end of the injection syringe (1) has a liquid outlet. A protruding spiral pattern structure (10) is provided on the bottom surface of the liquid outlet along the circumferential direction. The spiral pattern structure (10) can make the liquid form a vortex.

2. The pre-filled catheter pulse injector as described in claim 1, characterized in that: The tip of the elastic tooth (5) faces the tail of the push rod (2) and is set upward at an angle.

3. The pre-filled catheter pulse injector as described in claim 2, characterized in that: A flat tooth (6) is provided between two adjacent elastic teeth (5). The height of the flat tooth (6) is smaller than the height of the elastic tooth (5). There is a gap between the flat tooth (6) and the blocking structure.

4. The pre-filled catheter pulse injector as described in claim 3, characterized in that: Each of the elastic teeth (5) has a tooth groove (7) on the front and back, and the elastic teeth (5) can deform into the tooth groove (7) after being compressed.

5. The pre-filled catheter pulse injector as described in claim 1, characterized in that: Multiple reinforcing plates (8) are arranged laterally between two adjacent edges (4), and the multiple reinforcing plates (8) are distributed at equal intervals along the length direction.

6. The pre-filled catheter pulse injector as described in claim 1, characterized in that: The blocking structure includes two blocking rings (9) protruding from the inner wall surface of the injection syringe (1), with the two blocking rings (9) distributed along the same circumferential direction.

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