Positive pressure type venous indwelling needle

Abstract

The utility model discloses a positive pressure type venous indwelling needle which comprises a puncture needle head, a catheter and a three-way connector, the puncture needle head is connected with the three-way connector through the catheter, sterile protective films are attached to the puncture needle head and the catheter, and the three-way connector is provided with two binding type fixing assemblies. The two binding type fixing assemblies are installed at the upper end and the lower end of the three-way connector correspondingly, each binding type fixing assembly comprises a first sleeve, a winding rod, a binding belt, a second sleeve and an adhesion type winding rod, each first sleeve is fixed to one side of the three-way connector, and a leading-out opening is formed in the lower end of each first sleeve; the binding belt is wound on the winding rod, the end of the binding belt is led out of the leading-out opening and connected with the adhesion type winding rod, and the adhesion type winding rod is rotationally arranged in the second sleeve. According to the binding type fixing assembly designed by the utility model, the three-way connector of the venous indwelling needle can be quickly and efficiently fixed, and the stability of the venous indwelling needle in the using process is improved.

Description

Technical Field

[0001] This utility model relates to the field of intravenous indwelling needle technology, specifically a positive pressure intravenous indwelling needle. Background Technology

[0002] A positive pressure intravenous catheter is a medical device used to insert into a patient's blood vessel for intravenous infusion, blood collection, or drug administration. It typically consists of a thin plastic tube and a sharp needle. The design of the intravenous catheter allows healthcare professionals to easily connect it to a vein when a patient requires prolonged infusion or repeated blood collection. The catheter is usually inserted into the patient's vein, and medications or fluids are delivered into the patient's circulatory system through the tubing. This device is widely used in medical practice and is especially important for patients who require long-term infusion or frequent blood collection, greatly reducing patient discomfort.

[0003] However, existing positive pressure intravenous catheters have the following problems during use: After insertion and installation, to prevent dislodgement, medical staff usually use a sterile protective film to secure the catheter. However, the three-way connector at the end of the catheter is relatively large and difficult to secure with the sterile protective film. Therefore, adhesive tape is often used for fixation. However, in actual use, patient movement, impacts to the three-way connector, or sweat can easily cause the tape on the connector to come off, affecting the overall fixation of the intravenous catheter and requiring frequent and cumbersome replacement. Therefore, a corresponding technical solution needs to be designed to address these technical problems. Utility Model Content

[0004] The purpose of this invention is to provide a positive pressure intravenous indwelling needle, which solves the problem that after intravenous indwelling needle insertion and installation, in order to prevent it from falling off, medical staff usually use a sterile protective film to fix the indwelling needle. However, the three-way connector at the tail of the indwelling needle is relatively large and difficult to fix with a sterile protective film. Therefore, tape is often used to fix and bind it. However, in actual use, when the patient moves and bumps against the three-way connector or sweat seeps in, the tape on the three-way connector is easily detached, which affects the fixation effect of the entire intravenous indwelling needle and requires frequent and cumbersome replacement.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a positive pressure intravenous indwelling needle, comprising a puncture needle, a drainage tube, and a three-way connector. The puncture needle is connected to the three-way connector via the drainage tube. A sterile protective film is affixed to the puncture needle and the drainage tube. The three-way connector is equipped with two sets of restraint-type fixation components, which are respectively installed at the upper and lower ends of the three-way connector. Each restraint-type fixation component includes a first sleeve, a winding rod, a restraint strap, a second sleeve, and an adhesive winding rod. The first sleeve is fixed to the three-way connector. The head has an outlet on one side and at the lower end. The winding rod is rotatably installed inside the first sleeve. The binding strap is wrapped around the winding rod and its end extends out from the outlet and is connected to the adhesive winding rod. The adhesive winding rod is rotatably installed inside the second sleeve. The second sleeve is fixed to the other side of the tee connector and has an inlet at the bottom. The adhesive winding rod has a three-section structure, consisting of a floating pad, a rotating rod, and a locking head. The floating pad is rotatably installed on the inner wall of the second sleeve. The upper and lower ends of the rotating rod are connected to the floating pad and the locking head, respectively.

[0006] In a preferred embodiment of this utility model, one end of the sleeve two is provided with an insertion port, and the inner wall of the insertion port is formed with a number of limiting grooves, which are evenly distributed in a ring shape.

[0007] In a preferred embodiment of this invention, the floating pad is made of rubber material and its surface is processed into a layered structure.

[0008] In a preferred embodiment of this invention, the rotating rod includes a rod body and a transparent colloid disposed on the surface of the rod body, wherein the diameter of the rotating rod is smaller than the diameter of the floating pad.

[0009] In a preferred embodiment of this utility model, the locking head includes a disc body, a limiting protrusion, and a screw head. The disc body is fixed to the upper end of the rod body. The limiting protrusion is divided into several groups and evenly distributed around the outer periphery of the disc body. The limiting protrusion is used in conjunction with the limiting groove. The screw head is fixed on the disc body.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0011] 1. This solution improves upon the existing fixation method for positive pressure intravenous catheters by incorporating a binding fixation component at the three-way connector of the catheter. This binding fixation component has a simple structure, eliminates the need for tape fixation, and can be wrapped around the three-way connector according to its location and size. The tightness can be adjusted as needed, greatly improving the fixation effect of the three-way connector of the intravenous catheter and reducing the possibility of decreased stability of the intravenous catheter due to collision with the three-way connector or sweat seeping into the tape.

[0012] 2. The binding fixation component designed in this solution can quickly and efficiently fix the three-way connector of the indwelling venous catheter, improving the stability of the indwelling venous catheter during use. Attached Figure Description

[0013] Figure 1 This is an overall structural diagram of the present invention;

[0014] Figure 2 This is a structural diagram of the binding and fixing component described in this utility model;

[0015] Figure 3 This is a structural diagram of the sleeve in its split state according to the present invention.

[0016] In the diagram: 1. Puncture needle; 2. Fluid guide tube; 3. T-connector; 4. Sterile protective film; 5. Sleeve 1; 6. Retractor; 7. Restraint strap; 8. Sleeve 2; 9. Adhesive retractor; 10. Outlet; 11. Inlet; 12. Floating pad; 13. Rotating rod; 14. Locking head; 15. Insertion port; 16. Limiting groove; 17. Rod body; 18. Transparent colloid; 19. Disc body; 20. Limiting protrusion; 21. Tightening head. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figure 1-3This utility model provides a technical solution: a positive pressure intravenous indwelling needle, including a puncture needle 1, a drainage tube 2, and a three-way connector 3. The puncture needle 1 is connected to the three-way connector 3 through the drainage tube 2. A sterile protective film 4 is attached to the puncture needle 1 and the drainage tube 2. The three-way connector 3 is equipped with two sets of restraint-type fixation components, which are respectively installed at the upper and lower ends of the three-way connector 3. The restraint-type fixation components include a first sleeve 5, a winding rod 6, a restraint strap 7, a second sleeve 8, and an adhesive winding rod 9. The first sleeve 5 is fixed to one side of the three-way connector 3 and has an opening at its lower end. There is an outlet 10, and a winding rod 6 is rotatably installed inside the sleeve 1 5. The binding strap 7 is wrapped around the winding rod 6 and its end is led out from the outlet 10 and connected to the adhesive winding rod 9. The adhesive winding rod 9 is rotatably set inside the sleeve 2 8. The sleeve 2 8 is fixed to the other side of the three-way connector 3 and has an inlet 11 at the bottom. The adhesive winding rod 9 has a three-section structure, namely a floating pad 12, a rotating rod 13 and a locking head 14. The floating pad 12 is rotatably set on the inner wall of the sleeve 2 8. The upper and lower ends of the rotating rod 13 are connected to the floating pad 12 and the locking head 14, respectively.

[0019] Further improvements, such as Figure 3 As shown, one end of the sleeve 2 8 is provided with a socket 15. Several sets of limiting grooves 16 are machined on the inner wall of the socket 15. The several sets of limiting grooves 16 are evenly distributed in a ring shape. With the help of the limiting protrusion 20, the locking head 14 and the rotating rod 13 can be locked.

[0020] Further improvements, such as Figure 3 As shown, the floating pad 12 is made of rubber and its surface is processed into a layered structure, which facilitates the floating adjustment of the rotating rod 13.

[0021] Further improvements, such as Figure 3 As shown, the rotating rod 13 includes a rod body 17 and a transparent colloid 18 disposed on the surface of the rod body 17. The diameter of the rotating rod 13 is smaller than the diameter of the floating pad 12. The rotating rod 13 binds and wraps the binding strip 7 during the winding process.

[0022] Specifically, the locking head 14 includes a disc body 19, a limiting protrusion 20, and a screw head 21. The disc body 19 is fixed to the upper end of the rod body 17. The limiting protrusion 20 is divided into several groups and evenly distributed around the outer periphery of the disc body 19. The limiting protrusion 20 is used in conjunction with the limiting groove 16. The screw head 21 is fixed on the disc body 19. Medical staff can lock and unlock the rotating rod 13 through the locking head 14.

[0023] In use: After the intravenous catheter is inserted and needs to be fixed, the medical staff can attach the sterile protective film 4 to the puncture needle 1 and the infusion tube 2 for fixation. Then, pull the end of the restraint band 7 and extend it from the sleeve 5 and wrap it around the puncture site, such as the arm, leg, or head. The end of the restraint band 7 is then attached to the transparent adhesive 18. At this time, the medical staff pulls the locking head 14 to disengage the limiting protrusion 20 from the limiting groove 16 and rotates the locking head 14. The rotating rod 13 is used to wrap and tighten the restraint band 7. After the fixation is completed, the locking head 14 is reset and the limiting protrusion 20 is inserted into the corresponding limiting groove 16 to achieve efficient fixation of the three-way connector 3.

[0024] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "third," or "fourth" may explicitly or implicitly include at least one of those features.

[0026] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0027] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A positive pressure intravenous indwelling needle, comprising a puncture needle (1), a catheter (2), and a three-way connector (3), wherein the puncture needle (1) is connected to the three-way connector (3) via the catheter (2), a sterile protective film (4) is affixed to the puncture needle (1) and the catheter (2), and the three-way connector (3) is equipped with two sets of restraint-type fixation components, characterized in that: Two sets of the aforementioned binding and fixing components are respectively installed at the upper and lower ends of the tee connector (3). The binding and fixing components include a sleeve one (5), a winding rod (6), a binding strap (7), a sleeve two (8), and an adhesive winding rod (9). The sleeve one (5) is fixed to one side of the tee connector (3) and has an outlet (10) at its lower end. The winding rod (6) is rotatably installed inside the sleeve one (5). The binding strap (7) is wrapped around the winding rod (6) and its end is led out from the outlet (10) and connected to the adhesive winding rod (9). 9) Connected to each other, the adhesive roller (9) is rotatably disposed inside the sleeve two (8), the sleeve two (8) is fixed to the other side of the three-way connector (3) and has an inlet (11) at the bottom, wherein the adhesive roller (9) is a three-section structure and consists of a floating pad (12), a rotating rod (13) and a locking head (14), the floating pad (12) is rotatably disposed on the inner wall of the sleeve two (8), and the upper and lower ends of the rotating rod (13) are connected to the floating pad (12) and the locking head (14) respectively.

2. The positive pressure intravenous indwelling needle according to claim 1, characterized in that: One end of the sleeve (8) is provided with a socket (15), and a number of limiting grooves (16) are formed on the inner wall of the socket (15), and the number of limiting grooves (16) are evenly distributed in a ring.

3. The positive pressure indwelling intravenous catheter according to claim 1, characterized in that: The floating pad (12) is made of rubber material and its surface is processed into a layered structure.

4. A positive pressure intravenous indwelling needle according to claim 3, characterized in that: The rotating rod (13) includes a rod body (17) and a transparent colloid (18) disposed on the surface of the rod body (17). The diameter of the rotating rod (13) is smaller than the diameter of the floating pad (12).

5. A positive pressure intravenous indwelling needle according to claim 2, characterized in that: The locking head (14) includes a disc body (19), a limiting protrusion (20), and a screw head (21). The disc body (19) is fixed to the upper end of the rod body (17). The limiting protrusion (20) is divided into several groups and evenly distributed around the disc body (19). The limiting protrusion (20) is used in conjunction with the limiting groove (16). The screw head (21) is fixed on the disc body (19).

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