Venous indwelling needle with color code mark on catheter

Abstract

The utility model discloses a venous indwelling needle with a color code mark on a catheter, relates to the technical field of medical instruments, and solves the problems that in the prior art, the catheter can fall off or break, and visual feedback cannot be provided during needle withdrawal. Comprising a protective sleeve, a catheter, a funnel, a three-way catheter seat, a needle tube, a needle seat, a hose, a sliding clamping plate, a three-way connecting seat, a heparin cap and an end cap, a color code is arranged at the front end of the catheter, the color code is an annular color ring, the width of the color ring is 0.5-1.5 mm, the color code and the catheter are integrally formed, and the color of the color ring and the color of a catheter body form a contrast color. The color code integrated catheter has the advantages that the color code and the catheter are integrally formed, the color code is prevented from falling off, the color code can provide visual feedback when a needle is pulled out, catheter breakage caused by misoperation is avoided, and risks caused by visual errors are reduced.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a venous indwelling needle with a color-coded catheter. Background Technology

[0002] Intravenous catheters, as a commonly used infusion tool in clinical practice, have evolved from early open-type to closed-type. However, when medical staff remove the indwelling catheter from the human blood vessel, factors such as bending, cracking, failure to secure the catheter to the catheter seat, and improper operation may cause the catheter to fall off the catheter seat or break in the body. The catheter remaining in the blood vessel may cause serious complications such as embolism and infection as it flows with the blood, and may even endanger life.

[0003] Current clinical practice mainly relies on the experience of medical staff to judge the integrity of catheters. However, catheter dislodgement or breakage may occur in blood vessel segments outside the puncture site, which cannot be directly observed with the naked eye. Although some products use radiopaque lines, they require additional equipment for imaging examinations and cannot provide intuitive feedback when the needle is removed.

[0004] Therefore, this invention proposes a venous indwelling needle with a color-coded label to solve the above-mentioned problems. Utility Model Content

[0005] The purpose of this invention is to provide a venous indwelling needle with a color-coded label to solve the problem in the prior art where the catheter may fall off or break, and no intuitive feedback can be provided when the needle is removed.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] A type of indwelling intravenous catheter with color-coded markings includes a protective sheath, a catheter, a funnel, a three-way catheter seat, a needle tube, a needle hub, a flexible tube, a sliding clamping plate, a three-way connector, a heparin cap, and an end cap. The protective sheath is fitted over the outside of the needle tube. The tail end of the needle tube is interference-fitted to the needle hub. The tail end of the catheter is sequentially connected to the funnel and the three-way catheter seat. The funnel and the three-way catheter seat are fixedly connected. An isolation plug is provided inside the three-way catheter seat. The side wall of the three-way catheter seat is connected to the three-way connector via a flexible tube. A sliding clamping plate is fitted over the outside of the flexible tube. The three-way connector is connected to the heparin cap and the end cap. A color-coded marking is provided at the front end of the catheter. The color-coded marking is an annular color ring with a width of 0.5-1.5 mm. The color-coded marking is integrally formed with the catheter, and the color of the color ring contrasts with the color of the catheter body.

[0008] Furthermore, the catheter includes an inner layer and an outer layer, wherein the inner layer is made of polyurethane material and the outer layer is made of medical-grade polyurethane material with added color masterbatch.

[0009] Furthermore, the outer periphery of the catheter is provided with scale markings, which are made of medical-grade polyurethane material with added color masterbatch.

[0010] Furthermore, the added masterbatch is a fluorescent masterbatch.

[0011] Furthermore, the three-way connector includes a main channel and a side channel. The main channel is connected to a hose, and the side channel is connected to the heparin cap. A one-way valve is provided in the side channel.

[0012] Furthermore, the heparin cap includes a cap body and a sealing plug. The cap body is threadedly connected to a three-way connector. The sealing plug is disposed inside the cap body. The sealing plug has a puncture hole at its center and an elastic sealing ring inside the puncture hole.

[0013] Furthermore, the sliding clamping plate is provided with an adhesive part for fixing to the skin, and the adhesive part is covered with release paper.

[0014] In summary, compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] 1. The catheter of this utility model uses an inner polyurethane layer and an outer medical-grade polyurethane layer with added color masterbatch. The color mark is integrally molded with the catheter, preventing the color mark from falling off. The color mark can provide intuitive feedback when the needle is removed, avoiding catheter breakage. The fluorescent color masterbatch makes the color mark and scale clearly visible even in low light conditions, expanding the application scenarios and reducing the risks caused by visual errors.

[0016] 2. The scale markings of this utility model can help medical staff accurately judge the depth of catheter placement and avoid displacement due to being too shallow.

[0017] 3. The sliding clamping plate of this utility model is fixed to the skin by the adhesive part, which effectively restricts the seat displacement of the tubing and three-way catheter, and reduces the risk of catheter dislodgement due to patient movement.

[0018] 4. The isolation plug, elastic sealing ring and one-way valve in the three-way catheter seat of this utility model constitute a closed infusion system, which reduces the risk of blood exposure and contamination. Attached Figure Description

[0019] Figure 1 This is an exploded structural diagram of the main view of this utility model;

[0020] Figure 2 for Figure 1 A partial cross-sectional schematic diagram;

[0021] Figure 3 This is a schematic diagram showing the connection between the tee connector and the catheter;

[0022] In the diagram: 1. Protective sleeve; 2. Tube; 3. Funnel; 4. Three-way tube seat; 5. Isolation plug; 6. Needle; 7. Needle seat; 8. Sliding clamping plate; 9. Tube; 10. Three-way connector; 11. Heparin cap; 12. End cap; 13. Color mark; 18. Cap body; 19. Sealing plug; 22. Adhesive part; 23. Release paper; 24. One-way valve. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] In this application, the terms "upper," "inner," "outer," "middle," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0025] like Figure 1-3 As shown, an indwelling intravenous catheter with color-coded markings includes a protective sleeve 1, a catheter 2, a funnel 3, a three-way catheter seat 4, a needle tube 6, a needle hub 7, a flexible tube 9, a sliding clamping plate 8, a three-way connector 10, a heparin cap 11, and an end cap 12. The protective sleeve 1 is fitted over the outside of the needle tube 6. The tail end of the needle tube 6 is press-fitted to the needle hub 7. The tail end of the catheter 2 is sequentially connected to the funnel 3 and the three-way catheter seat 4. The funnel 3 and the three-way catheter seat 4 are fixedly connected. An isolation plug 5 is provided inside the three-way catheter seat 4. The side wall of the three-way catheter seat 4 is connected to the three-way connector 10 through the flexible tube 9. A sliding clamping plate 8 is fitted over the outside of the flexible tube 9. The three-way connector 10 is connected to the heparin cap 11 and the end cap 12. The three-way connector 10 includes a main channel and a side channel. The main channel is connected to the flexible tube 9, and the side channel is connected to the heparin cap 11. A one-way valve 24 is provided inside the side channel. The heparin cap 11 includes a cap body 18 and a sealing plug 19. The cap body 18 is threadedly connected to a three-way connector 10. The sealing plug 19 is disposed inside the cap body 18. The sealing plug 19 has a puncture hole at its center and an elastic sealing ring inside the puncture hole.

[0026] Furthermore, the front end of the catheter 2 is provided with a color mark 13, which is an annular color ring with a width of 0.5-1.5 mm. The color mark 13 is integrally formed with the catheter 2, and the color of the color ring contrasts with the main body color of the catheter 2. The catheter 2 includes an inner layer and an outer layer. The inner layer is made of polyurethane material, and the outer layer is made of medical-grade polyurethane material with added color masterbatch. The outer periphery of the catheter 2 is provided with graduation markings made of medical-grade polyurethane material with added color masterbatch. The added color masterbatch is fluorescent color masterbatch.

[0027] Furthermore, the sliding clamping plate 8 is provided with an adhesive part 22 for fixing to the skin, and the adhesive part 22 is covered with release paper 23.

[0028] The working process of this utility model is as follows:

[0029] First, medical staff remove the protective cap 1, exposing the needle 6. The color mark 13 at the tip of the catheter 2 contrasts sharply with the main body of the catheter 2. Observing the scale markings on the outer periphery of the catheter 2 allows for a preliminary assessment of the insertion depth. Then, holding the needle hub 7, the needle 6 is inserted into the vein. As blood flows back into the needle 6, the catheter 2 is slowly advanced, allowing it to enter the vein. During this advancement, medical staff can observe the position of the catheter 2 tip within the blood vessel in real time through the color mark 13 to ensure successful insertion. The color mark 13 is integrally formed with the catheter 2, ensuring accurate observation. Meanwhile, the scale markings can help determine the depth of catheter 2 insertion. Then, the release paper 23 on the sliding clamping plate 8 is peeled off, and the sliding clamping plate 8 is fixed to the patient's skin through the adhesive part 22, thereby fixing the tubing 9 and the three-way catheter seat 4 to prevent the catheter 2 from falling off. Then, the three-way connector 10 is connected to the heparin cap 11, and the cap body 18 is threaded to the three-way connector 10. The puncture hole in the center of the sealing plug 19 is provided with an elastic sealing ring to ensure a tight connection. The end cap 12 is used to close the side channel of the three-way connector 10 and keep the three-way connector 10 clean.

[0030] During infusion, the fluid enters the catheter 2 through the main channel and is then injected into the patient's vein. The one-way valve 24 in the side channel can prevent blood backflow.

[0031] When removing the needle, the medical staff slowly pull out the needle tube 6, and then the catheter 2 is about to be pulled out. The color mark 13 is clearly contrasted with the main body of the catheter 2 and is fluorescent. It can be clearly observed even in a dimly lit environment, providing intuitive feedback on needle removal.

Claims

1. A type of indwelling intravenous catheter with color-coded markings, comprising a protective sheath (1), a catheter (2), a funnel (3), a three-way catheter holder (4), a needle tube (6), a needle hub (7), a flexible tube (9), a sliding clamping plate (8), a three-way connector (10), a heparin cap (11), and an end cap (12), characterized in that, The protective sleeve (1) is fitted on the outside of the needle tube (6). The tail end of the needle tube (6) is connected to the needle seat (7) with an interference fit. The tail end of the catheter (2) is connected to the funnel (3) and the three-way catheter seat (4) in sequence. The funnel (3) and the three-way catheter seat (4) are fixedly connected. An isolation plug (5) is provided inside the three-way catheter seat (4). The side wall of the three-way catheter seat (4) is connected to the three-way connector (10) through a flexible tube (9). A sliding clamping plate (8) is fitted on the outside of the flexible tube (9). The three-way connector (10) is connected to the heparin cap (11) and the end cap (12). A color mark (13) is provided at the front end of the catheter (2). The color mark (13) is an annular color ring with a width of 0.5-1.5 mm. The color mark (13) is integrally formed with the catheter (2). The color of the color ring is a contrasting color with the main body color of the catheter (2).

2. A venous indwelling needle with a color-coded catheter according to claim 1, characterized in that, The catheter (2) includes an inner layer and an outer layer, wherein the inner layer is made of polyurethane material and the outer layer is made of medical-grade polyurethane material with added color masterbatch.

3. A venous indwelling needle with color-coded markings as described in claim 2, characterized in that, The outer periphery of the catheter (2) is provided with scale markings, which are medical-grade polyurethane material with added color masterbatch.

4. A venous indwelling needle with a color-coded catheter according to claim 3, characterized in that, The added masterbatch is a fluorescent masterbatch.

5. A venous indwelling needle with a color-coded catheter according to claim 1, characterized in that, The three-way connector (10) includes a main channel and a side channel. The main channel is connected to the hose (9), and the side channel is connected to the heparin cap (11). A one-way valve (24) is provided in the side channel.

6. A venous indwelling needle with a color-coded catheter according to claim 5, characterized in that, The heparin cap (11) includes a cap body (18) and a sealing plug (19). The cap body (18) is threadedly connected to a three-way connector (10). The sealing plug (19) is disposed inside the cap body (18). The sealing plug (19) has a puncture hole at its center and an elastic sealing ring inside the puncture hole.

7. A venous indwelling needle with a color-coded catheter according to claim 1, characterized in that, The sliding clamping plate (8) is provided with an adhesive part (22) for fixing to the skin, and the adhesive part (22) is covered with release paper (23).

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