A protection part for an indwelling needle and an indwelling needle assembly

Abstract

The present invention relates to the technical field of indwelling needle medical devices, and specifically to an indwelling needle assembly integrated with an indwelling needle protection part and its convenient protection method. It includes: an infusion three-way stopcock; an indwelling needle protection part adjacent to the infusion three-way stopcock; wherein, the indwelling needle protection part of the infusion three-way stopcock is provided with a hole-shaped extension structure. The hole-shaped extension structure serves to accommodate and protect the indwelling needle. Therefore, the present invention provides a convenient protection method, which saves the separate needle guard while effectively protecting the indwelling needle. The structure is simple and practical, the usage method is simple, space is saved, making production, packaging, and transportation simpler, and helping to reduce the costs of manufacturing, assembling, and material management of the indwelling needle assembly; at the same time, since the indwelling needle protection part is provided on the infusion three-way stopcock, after the user finishes using the indwelling needle, it is also very convenient to insert the indwelling needle catheter with blood drawn into the indwelling needle protection part of the infusion three-way stopcock for storage, protection, and isolation, reducing the risk of medical pollution and meeting the actual use requirements.

Description

Technical Field

[0001] The present invention relates to the technical field of indwelling needle medical devices, and more specifically to an indwelling needle assembly with an indwelling needle protection part integrated therewith and a protection method therefor. Background Art

[0002] The use of indwelling needle assemblies in the prior art can reduce the pain suffered by patients due to repeated intravenous punctures and alleviate the workload of medical staff, and has now been widely applied. Combining Figure 3 , the core components of existing indwelling needles usually include a puncture needle 2 and a catheter 3 that can be indwelled in a blood vessel. Most indwelling needles need to be installed with a needle guard 1 for protection. The indwelling needle is easy to operate. During use, the catheter is inserted into the blood vessel together with the puncture needle. After the catheter completely enters the blood vessel, the puncture needle is retracted, and only the catheter is indwelled in the blood vessel for subsequent infusion treatment.

[0003] Currently, most indwelling needle assemblies on the market need to be separately installed with a needle guard to protect the indwelling needle. For example, Figure 1 as shown, it shows a needle guard 1 that needs to be separately installed and installed on the indwelling needle assembly. The installation effect is as shown in Figure 2 . This effectively protects the puncture needle and catheter in the indwelling needle assembly during production, packaging, transportation, and use. For example, Figure 3 shown in the sectional view. Such a separately provided needle guard increases the production cost and material transportation management cost of the indwelling needle assembly. In addition, after using the indwelling needle assembly for infusion, blood collection, and hemodialysis, when the indwelling needle is removed, the indwelling needle catheter remains with the patient's blood, which is likely to cause medical pollution. At this time, a needle guard is still needed to isolate and protect the indwelling needle catheter from contamination. However, the previous separate needle guard has already been removed and discarded before use or stored elsewhere, which is extremely inconvenient for users. Therefore, there is still a need for a convenient indwelling needle assembly that can conveniently store and protect the puncture needle and catheter in different scenarios before and after the use of the indwelling needle.

[0004] The Chinese patent publication number CN 109562224 A discloses a needle tip protector for an indwelling needle with a novel structure that can achieve improved safety performance compared to the prior art. The needle tip protector for an indwelling needle has a cylindrical peripheral wall, and by being externally inserted and assembled onto the needle hub of the indwelling needle and moving towards the needle tip side, it covers the needle tip of the indwelling needle. A locking portion is formed inside the needle tip protector for an indwelling needle covered by the cylindrical peripheral wall, and this locking portion is integrally formed with the cylindrical peripheral wall. The locking portion is locked with the needle hub at the position where the needle tip protector for an indwelling needle moves towards the needle tip side of the indwelling needle, preventing the indwelling needle from retreating towards the proximal end side, thereby preventing the needle tip from being exposed again. For this improved indwelling needle assembly, although the separate needle guard is cancelled, a needle tip protector for an indwelling needle with a similar function to the needle guard is additionally provided, similar to a telescopic sleeve structure. The needle guard protects the indwelling needle in a telescopic manner, and its structure is relatively complex, involving many parts, with high costs, large volume, and relatively complex operation. Further improvement is needed. For this reason, we provide a simple and effective indwelling needle protection portion and its indwelling needle assembly. Summary of the Invention

[0005] The purpose of the present invention is to solve the deficiencies of the prior art and provide an indwelling needle assembly and a protection method with an indwelling needle protection portion integrated therein, which no longer requires a separate needle guard and can effectively accommodate and protect the indwelling needle, reducing materials, saving space, lowering costs, having a simple structure, and the convenient design enables the indwelling needle to be conveniently accommodated and protected before and after use.

[0006] To achieve the above purpose, an indwelling needle assembly with an indwelling needle protection portion integrated therein is provided, which is characterized by including: an infusion three-way valve, and an indwelling needle protection portion adjacent to the infusion three-way valve, wherein the indwelling needle protection portion of the infusion three-way valve is provided with a hole-shaped extension structure.

[0007] Preferably, for the indwelling needle protection portion, the hole-shaped extension structure is characterized in that the length of its hole-shaped feature is at least greater than the length of the indwelling needle.

[0008] Preferably, for the indwelling needle protection portion, the hole-shaped extension structure is characterized in that the diameter of its hole-shaped feature is at least greater than the diameter of the indwelling needle.

[0009] Preferably, the indwelling needle protection portion is a functional structural feature part of the entire infusion three-way valve.

[0010] Preferably, in the functional structural part of the infusion three-way valve, the hole-shaped extension structure serves to accommodate and protect the indwelling needle.

[0011] Preferably, the indwelling needle has a structure including a puncture needle and a catheter, which are arranged inside the catheter hub.

[0012] Preferably, in the hole-shaped extension structure for receiving and protecting the indwelling needle, it is characterized in that a clamping part for limiting and clamping the catheter seat is arranged inside the hole-shaped extension structure.

[0013] Preferably, for the clamping part inside the hole-shaped extension structure, it is characterized in that a corresponding integral circular protrusion can be arranged on the inner assembly surface of the hole-shaped extension structure as the clamping part, or at least two small protrusions can be arranged as the clamping part.

[0014] Preferably, for the groove of the catheter seat, it is characterized in that the groove is located at the assembly surface position of the catheter seat for limiting and clamping the part.

[0015] The present invention relates to an indwelling needle assembly, mainly including a puncture needle, a catheter, a catheter seat, a puncture needle seat, an extension tube, a stopcock, an end cap, an infusion three-way valve, and a heparin cap. The infusion three-way valve has an indwelling needle protection part, and the hole-shaped extension structure of the indwelling needle protection part plays a role in receiving and protecting the indwelling needle.

[0016] Advantages of the Invention

[0017] The indwelling needle assembly provided by the present invention with an indwelling needle protection part integrated therein has advantages including but not limited to: The present invention provides a convenient way to use and protect the indwelling needle. While saving a separate needle protection sleeve, it can effectively protect the indwelling needle. The structure is simple and practical, saving space, making the production, packaging, transportation, and usage methods simpler, and helping to reduce the manufacturing, assembly, and material management costs of the indwelling needle assembly; at the same time, since the indwelling needle protection part is arranged on the infusion three-way valve, after the user finishes using the indwelling needle, it is also very convenient to insert the indwelling needle catheter with blood back into the indwelling needle protection part of the infusion three-way valve for storage, protection, and isolation, reducing the risk of medical pollution and meeting the actual usage requirements. Brief Description of the Drawings

[0018] Figure 1 Exemplarily shows a schematic structural diagram of one of the common indwelling needle assemblies on the market currently.

[0019] Figure 2 Exemplarily shows a schematic diagram after installing a common indwelling needle protection sleeve on the market currently.

[0020] Figure 3 Exemplarily shows Figure 2 a schematic cross-sectional view of

[0021] Figure 4 Exemplarily shows a schematic diagram of an infusion three-way valve with an indwelling needle protection part integrated therein according to the present invention and its hole-shaped extension structure.

[0022] Figure 5An exemplary schematic diagram of the assembled indwelling needle assembly with the integrated protection part of the present invention is shown.

[0023] Figure 6 Exemplarily shown Figure 5 Schematic cross-sectional view of the indwelling needle protection part.

[0024] Figure 7 An exemplary enlarged schematic diagram of the assembly details of the internal clamping part and the groove of the hole-shaped extension structure of the present invention is shown.

[0025] Figure 8 Exemplarily shown is a schematic diagram of another embodiment of the present invention where the clamping part has two protrusions.

[0026] Figure 9 An exemplary enlarged schematic diagram of different assembly positions of the internal clamping part and the groove of the hole-shaped extension structure of another embodiment of the present invention and the guiding details are shown.

[0027] In the figure: 1. Needle guard 2. Puncture needle 3. Catheter 4. Catheter hub 5. Puncture needle hub 6. Extension tube 7. Stopcock 8. End cap 9. Infusion three-way 10. Heparin cap 11. Indwelling needle protection part located on the infusion three-way 11a: Hole-shaped extension structure of the indwelling needle protection part 11b: Internal clamping part of the hole-shaped extension structure 11c: Internal guiding of the hole-shaped extension structure 4a: Groove of the catheter hub 4b: Guiding of the catheter hub Detailed implementation manners

[0028] First, this embodiment provides an indwelling needle assembly with an integrated indwelling needle protection part, including an infusion three-way 9; an indwelling needle protection part 11 adjacent to the infusion three-way 9; wherein, the indwelling needle protection part 11 of the infusion three-way 9 is provided with a hole-shaped extension structure 11a for receiving and protecting the indwelling needle. Combining Figure 5 , an exemplary schematic diagram of the entire assembly after receiving the indwelling needle is shown, saving a separate needle guard. For example, combining Figure 6 , in order to achieve the purpose of receiving and protecting the indwelling needle, in the hole-shaped extension structure feature 11a of the indwelling needle protection part 11, the length is at least greater than the length of the indwelling needle, and the diameter of its hole-shaped extension structure feature 11a is at least greater than the diameter of the indwelling needle. The indwelling needle to be received and protected includes a puncture needle 2 and a catheter 3, and the indwelling needle is arranged in a catheter hub 4.

[0029] In one embodiment, the hole-shaped extension structure 11a can be set as a through hole for convenient manufacturing; it can also be set as a blind hole, which has a unique insertion direction to prevent reverse insertion; since it is set as a blind hole, it is more secure and airtight, and can better receive and protect the catheter with residual blood after use, and can further reduce the risk of medical pollution. The following further exemplarily illustrates the indwelling needle protection part 11 of the infusion three-way 9 with reference to the accompanying drawings.

[0030] In another embodiment, as shown in Figure 4 shown, the indwelling needle protection part 11 belongs to a functional structural feature part of the whole infusion three-way valve 9. It can be integrally injection-molded into a whole part, or two parts can be injection-molded twice into one part. Of course, it can also be ultrasonically welded into one body, or the separate indwelling needle protection part 11 can be fixed on the infusion three-way valve 9 by using known common snap, slot, interference, and tight fit connection methods to integrate into a functional body part for convenient use.

[0031] Among them, the indwelling needle protection part 11 can be made of plastic, TPE, silicone, or metal materials. For example, it can be integrally injection-molded with the same plastic material as the infusion three-way valve 9, or injection-molded twice with TPE material. It can also be made of other plastic or metal materials into separate parts and then connected and fixed to the infusion three-way valve 9 by using common snap, slot, interference, and tight fit connection methods. The indwelling needle protection part 11 can be arranged at any suitable position on the infusion three-way valve 9.

[0032] In one embodiment, in combination with Figure 6 , the outer side of the assembly surface of the catheter seat 4 can be set as several small ribs for interference fit assembly and inserted into the indwelling needle protection part 11. In addition, several small ribs can also be arranged in the hole-shaped extension structure 11a of the indwelling needle protection part 11 to cooperate with the insertion of the catheter seat 4. Specifically, the functional structural feature of the indwelling needle protection part 11 is that the hole-shaped extension structure 11a plays a role in receiving and protecting the indwelling needle. Among them, in combination with Figure 7 the partial enlarged view of the assembly, the above-mentioned assembly surface of the catheter seat 4 refers to the characteristic part where the catheter seat 4 is inserted into the infusion three-way valve 9. In addition, the small ribs are not necessary.

[0033] In one of the preferred embodiments, in combination with Figure 7As shown, in the feature indwelling needle protection part 11, a locking part 11b for locking the groove 4a of the catheter seat 4 is arranged inside the hole-shaped extension structure 11a. The locking part 11b is used to be inserted into the corresponding groove 4a to play a role in limiting and preventing the catheter seat 4 from loosening. Corresponding to the locking part 11b, it is characterized in that at a suitable position corresponding to the assembly surface feature part of the catheter seat 4 inside the hole-shaped extension 11a, a corresponding whole-circle annular protrusion is arranged as the locking part 11b. For the groove 4a of the catheter seat, it is characterized in that the groove 4a is located at a suitable position on the assembly surface of the catheter seat 4 to limit the locking part 11b. The relative suitable positions of the above-mentioned locking part 11b and groove 4a can be the front end, middle, and rear end of the assembly surface. After the locking part 11b is inserted into the groove 4a in this way, the hole-shaped extension structure 11a can effectively accommodate and protect the catheter 3 and the puncture needle 2 in the catheter seat 4 and is not easy to loosen. In another implementation mode, a catheter seat guide 4b is arranged at the front end of the catheter seat 4 to facilitate the sliding-in guiding function during assembly and insertion. The catheter seat guide 4b presents a chamfer feature.

[0034] In another preferred implementation mode, in combination with Figure 8 As shown, the locking part 11b can also be set as at least two small protrusions as the locking part, which is convenient for manufacturing, assembling, and using. Further, according to the design, production, manufacturing requirements, and the actual use tightness effect, it can also be set as three or several small protrusions as the locking part.

[0035] In another preferred implementation mode, in combination with Figure 9 As shown, the relative suitable positions of the above-mentioned locking part 11b and groove 4a can be the front end, middle, and rear end of the assembly surface. For example Figure 9 As shown, the suitable position is set in the middle of the assembly surface. In addition, the above-mentioned chamfer guide can also be set at the position of the internal guide 11c of the hole-shaped extension structure of the indwelling needle protection part 11 to play a role in facilitating insertion and guiding.

[0036] In the above implementation mode, the convex locking part and the groove can be interchanged and set on different components to achieve the same limiting and anti-loosening effect. For example, the convex locking part can also be set on the assembly surface of the catheter seat 4; the groove can also be set inside the hole-shaped extension structure 11a of the indwelling needle protection part.

[0037] In the above implementation mode, the hole-shaped extension structure 11a of the indwelling needle protection part, the locking part 11b inside the hole-shaped extension structure, and the internal guide 11c of the hole-shaped extension structure belong to part of the features of the indwelling needle protection part 11. The groove 4a of the catheter seat and the catheter seat guide 4b belong to part of the features of the catheter seat 4.

[0038] In addition, in the above-described embodiments, the protruding locking portion 11b and the groove 4a serve as a limiting and locking function, but the protruding locking portion 11b and the groove 4a are not necessary; the catheter seat guide 4b and the internal guide 11c of the hole-shaped extension structure serve as a guiding function, but the catheter seat guide 4b and the internal guide 11c of the hole-shaped extension structure are not necessary.

[0039] In addition, as shown in Figure 5 and Figure 6 This embodiment further provides an indwelling needle assembly, which mainly includes a puncture needle, a catheter, a catheter seat, a puncture needle seat, an extension tube, a stopcock, an end cap, an infusion three-way valve 9, and a heparin cap. It is characterized by further including an indwelling needle protection portion 11 integrated with the infusion three-way valve as described in any one of claims 1-9. The hole-shaped extension structure 11a of the indwelling needle protection portion 11 serves to accommodate and protect the indwelling needle. There is no need for a separate needle guard, and the puncture needle 2 and the catheter 3 can also be accommodated and protected; moreover, after using the indwelling needle assembly, the user can also conveniently insert the catheter seat 4 into the indwelling needle protection portion 11 to accommodate and protect the indwelling needle catheter 3 that has been contaminated by blood, which helps to reduce the risk of medical pollution.

[0040] As described above, this is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope and usage mode disclosed by the present invention, according to the technical solution and innovative concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A indwelling needle assembly, characterized in that Including: An infusion three-way stopcock; A protection part for an indwelling needle adjacent to the infusion three-way stopcock; Wherein, the protection part for the indwelling needle of the infusion three-way stopcock is provided with a hole-shaped extension structure; A locking part for locking the catheter seat groove is arranged inside the hole-shaped extension structure; A corresponding integral ring-shaped protrusion or at least two small protrusions are arranged as the locking part on the assembly surface of the hole-shaped extension structure corresponding to the catheter seat inside; It further includes a puncture needle and a catheter, and the puncture needle and the catheter are arranged in the catheter seat.

2. The indwelling needle assembly according to claim 1, characterized in that The length of the hole-shaped extension structure provided in the protection part for the indwelling needle is at least greater than the length of the indwelling needle.

3. The indwelling needle assembly according to claim 1, characterized in that The diameter of the hole-shaped extension structure provided in the protection part for the indwelling needle is at least greater than the diameter of the indwelling needle.

4. The indwelling needle assembly according to claim 1, wherein The protection part for the indwelling needle belongs to a functional structural feature part of the whole infusion three-way stopcock.

5. A venous indwelling needle assembly mainly includes a puncture needle, a catheter, a catheter hub, a puncture needle hub, an extension tube, a stopcock, an end cap, an infusion three-way stopcock, and a heparin cap, characterized in that It further includes an indwelling needle assembly as described in any one of claims 1-4. The indwelling needle assembly has a protection part for the indwelling needle, and the hole-shaped extension structure of the protection part for the indwelling needle serves to accommodate and protect the indwelling needle.

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