Remaining needle with anti-reflux valve

Abstract

The utility model relates to the technical field of medical treatment, in particular to a remaining needle with an anti-reflux valve, which comprises a hose, a needle head and a connector are respectively fixed at two ends of the hose, the anti-reflux valve is arranged on the hose, the anti-reflux valve comprises a sleeve, the sleeve is sleeved on the hose, a cylinder is fixedly arranged on the sleeve in a penetrating manner, and the sleeve is sleeved on the connector. A threaded rod is arranged in the cylinder in a threaded and penetrating mode, and an extrusion block is fixed to the portion, in the sleeve, of the threaded rod. When the anti-backflow indwelling needle is used, the threaded rod is screwed to drive the extrusion block to move, the extrusion block extrudes a hose penetrating through the sleeve, then the hose is clamped, in the using process, the situation that the extrusion block is separated from the hose due to touch of external force is avoided, and the anti-backflow effect of the indwelling needle can be ensured.

Description

Technical Field

[0001] This utility model relates to the field of medical technology, and in particular to an indwelling needle with an anti-backflow valve. Background Technology

[0002] Indwelling catheters are medical devices that are retained during intravenous infusion. Their use reduces the pain and fear of injections caused by repeated venipuncture in children, alleviates parental anxiety, facilitates clinical medication administration, aids in the resuscitation of critically ill patients, reduces nurses' workload, and minimizes children's pain. Therefore, indwelling catheters are widely used in clinical practice. However, for children, a special group, the duration of catheter placement and their comfort are the primary concerns for both nurses and parents, and are also indicators of successful use and prerequisites for widespread adoption.

[0003] Existing indwelling needles use a reflux clamp to prevent blood backflow after the infusion is completed. This clamp relies on its own elasticity to hold the tubing in place, preventing backflow. However, in practice, especially with children, the reflux clamp may break due to their lack of understanding and their playful nature. This can lead to blood backflow, potentially harming a child's health if not detected promptly. Therefore, an indwelling needle with an anti-reflux valve is needed to meet this requirement. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing indwelling needles, such as the tendency for the stop clamp on the needle to break open, and to propose an indwelling needle with an anti-backflow valve.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] Design an indwelling needle with an anti-backflow valve, including a flexible tube with a needle tip and a connector fixed at both ends. The flexible tube is provided with an anti-backflow valve, which includes a sleeve fitted onto the flexible tube. A cylinder is inserted through and fixed on the sleeve, and a threaded rod is threaded through and inserted into the cylinder. A compression block is fixed on the threaded rod inside the sleeve.

[0007] Preferably, the extrusion block has a hemispherical structure and the sleeve is a square tube.

[0008] Preferably, an anti-slip cap is fixed to the end of the threaded rod away from the extrusion block.

[0009] Preferably, an anti-detachment mechanism is fixed on the threaded rod inside the sleeve.

[0010] Preferably, the anti-detachment mechanism includes an anti-detachment plate, which is fitted and fixed on the threaded rod, and the compression block and the cylinder are disposed on both sides of the anti-detachment plate.

[0011] Preferably, the anti-detachment plate and the sleeve are symmetrically fixed with a limiting component.

[0012] Preferably, the limiting component includes a triangular prism-shaped first limiting plate and a triangular prism-shaped second limiting plate, the first limiting plate and the second limiting plate being fixed to the anti-detachment plate and the sleeve, respectively.

[0013] The present invention provides an indwelling needle with an anti-backflow valve, which has the following advantages: when the indwelling needle with the anti-backflow valve is in use, turning the threaded rod can drive the squeezing block to move, so that the squeezing block can squeeze the hose passing through the sleeve and clamp the hose. In addition, during use, the squeezing block will not be dislodged from the hose due to external force, thus ensuring the anti-backflow effect of the indwelling needle. Attached Figure Description

[0014] Figure 1 This is a front view of an indwelling needle with an anti-backflow valve proposed in this utility model;

[0015] Figure 2 This is a top view of an anti-backflow valve for an indwelling needle with an anti-backflow valve proposed in this utility model.

[0016] Figure 3 The right view of the anti-backflow valve of the indwelling needle with anti-backflow valve proposed in this utility model;

[0017] Figure 4 This is a diagram showing the state of the hose during use of the anti-backflow valve of the indwelling needle with an anti-backflow valve proposed in this utility model.

[0018] In the diagram: 1. Needle; 2. Tube; 3. Connector; 4. Sleeve; 5. Compression block; 6. Threaded rod; 7. Anti-slip cap; 8. Anti-detachment plate; 9. Cylinder; 10. First limiting plate; 11. Second limiting plate. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0020] Example 1: Refer to Figure 1 , 34. An indwelling needle with an anti-backflow valve includes a tubing 2, with a needle 1 and a connector 3 fixed at both ends of the tubing 2. The tubing 2 is equipped with an anti-backflow valve, which includes a sleeve 4 fitted onto the tubing 2. The sleeve 4 is a square tube, with a cylindrical tube 9 passing through and fixedly installed on the sleeve 4. A threaded rod 6 is threaded through and installed in the cylindrical tube 9. A compression block 5 is fixed on the threaded rod 6 inside the sleeve 4. The compression block 5 has a hemispherical structure. Twisting the threaded rod 6 can adjust the distance between the compression block 5 and the tubing 2. When the hemispherical compression block 5 compresses the tubing 2 to prevent backflow, it will not damage the tubing 2, thus not affecting the performance of the tubing 2. An anti-slip cap 7 is fixed on the end of the threaded rod 6 away from the compression block 5. The anti-slip cap 7 facilitates the twisting of the threaded rod 6.

[0021] When in use, after the infusion is finished, turn the anti-slip cap 7. The anti-slip cap 7 drives the threaded rod 6 to rotate in the cylinder 9. Due to the threaded arrangement between the cylinder 9 and the threaded rod 6, the squeezing block 5 can be moved towards the tubing 2 until the tubing 2 is squeezed by the squeezing block 5, thus clamping the tubing 2. During use, the squeezing block 5 will not be dislodged from the tubing 2 due to external force, which can ensure the anti-backflow effect of the indwelling needle.

[0022] Example 2: In Example 1, because the indwelling needle with anti-backflow valve needs to be used for several days, the threaded rod 6 needs to be turned multiple times. When the threaded rod 6 is turned in the reverse direction, it can cause the extrusion block 5 to dislodge from the cylinder 9. This can easily lead to the loss of the threaded rod 6, resulting in the indwelling needle with anti-backflow valve being discarded before its service life is over. (Refer to...) Figure 1 and 2 As another preferred embodiment of this utility model, the difference from embodiment 1 is that an anti-detachment mechanism is fixed on the threaded rod 6 inside the sleeve 4. The anti-detachment mechanism includes an anti-detachment plate 8, which is fitted and fixed on the threaded rod 6. The extrusion block 5 and the cylinder 9 are located on both sides of the anti-detachment plate 8. The anti-detachment plate 8 can prevent the extrusion block 5 from coming out of the cylinder 9, thereby avoiding the loss of the threaded rod 6.

[0023] A limiting component is symmetrically fixed between the anti-detachment plate 8 and the sleeve 4. The limiting component includes a triangular prism-shaped first limiting plate 10 and a triangular prism-shaped second limiting plate 11. The first limiting plate 10 and the second limiting plate 11 are respectively fixed on the anti-detachment plate 8 and the sleeve 4. During the process of the squeezing block 5 moving towards the hose 2 and squeezing the hose 2, the two second limiting plates 11 move towards the two first limiting plates 10 respectively. When the squeezing block 5 clamps the hose 2, the two first limiting plates 10 abut against the two second limiting plates 11 respectively, limiting the squeezing block 5 from continuing to squeeze the hose 2. While ensuring that the hose 2 is clamped, it can also ensure that the hose 2 will not be crushed by the squeezing block 5. It can serve as a reminder to medical staff, without requiring medical staff to control the distance of driving the squeezing block 5.

[0024] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An indwelling needle with an anti-backflow valve, comprising a hose (2), a needle (1) and a connecting head (3) fixed at both ends of the hose (2), characterized in that, The anti-backflow valve is arranged on the hose (2), comprises a sleeve (4) sleeved on the hose (2), a cylinder (9) is arranged on the sleeve (4) and fixed, a threaded rod (6) is arranged in the cylinder (9) and fixed, and a pressing block (5) is fixed on the threaded rod (6) in the sleeve (4).

2. The indwelling needle with an anti-reflux valve according to claim 1, characterized in that, The pressing block (5) is a hemispherical structure, and the sleeve (4) is a square cylinder.

3. The indwelling needle with an anti-reflux valve according to claim 1, characterized in that, An anti-skid cap (7) is fixed on one end of the threaded rod (6) away from the pressing block (5).

4. The indwelling needle with an anti-reflux valve according to claim 1, characterized in that, The threaded rod (6) in the sleeve (4) is fixed with an anti-falling mechanism.

5. The indwelling needle with an anti-reflux valve according to claim 4, characterized in that, The anti-falling mechanism comprises an anti-falling plate (8) sleeved and fixed on the threaded rod (6), and the pressing block (5) and the cylinder (9) are arranged on the two sides of the anti-falling plate (8).

6. The indwelling needle with an anti-reflux valve according to claim 5, characterized in that, A limiting assembly is symmetrically fixed between the anti-falling plate (8) and the sleeve (4).

7. The indwelling needle with an anti-reflux valve according to claim 6, characterized in that, The limiting assembly comprises a first limiting plate (10) and a second limiting plate (11) in triangular prism shapes, and the first limiting plate (10) and the second limiting plate (11) are fixed on the anti-falling plate (8) and the sleeve (4) respectively.

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