Site-specific intervention injection needle

Abstract

The utility model provides a kind of fixed-point intervention injection needle, including the handle of needle connected with syringe, and the needle head connected with handle of needle, handle of needle and needle head are connected by sliding assembly, to make needle head limitedly slide in handle of needle along axial direction, needle head includes the needle stem connected with sliding assembly, and the needle tip integrally made with needle stem, needle tip is the rotating body structure being set along axial direction, needle stem and needle tip are provided with the flow channel for drug liquid inflow, needle tip is provided with the injection hole being communicated with flow channel and outside, the edge of injection hole near flow channel side is set as bevel angle, bevel angle is set as bevel angle from the edge of injection hole to the center of injection hole, from inside to outside, injection hole edge near outside side is set as round angle, the utility model can reduce the damage of conventional needle head to blood vessel tissue, and more portable adjustment needle head length, to cope with different projects.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a targeted interventional injection needle. Background Technology

[0002] Targeted interventional therapy refers to the precise delivery of highly effective drugs for controlling soft tissue inflammation to the affected area to treat bone, joint, and soft tissue injuries and inflammation, thereby relieving pain. The main drugs are Zhengqing Fengtongning injection or other anti-inflammatory medications. The pharmacological mechanism of Zhengqing Fengtongning injection is primarily due to the extract of *Sinomenium acutum*, sinomenine hydrochloride. The resulting injection is the only domestically produced single-component herbal medicine preparation for rheumatic pain that has won the second prize of the National Science and Technology Progress Award. It possesses anti-inflammatory, analgesic, immunomodulatory, anticoagulant, microcirculation-improving, histamine-releasing, anti-fibrotic, muscle-tension-relieving, and sedative effects. "Targeted intervention" is the core technology of the "Rheumatism and Pain Triad Sequential Therapy." After drug formulation, the medication is administered via injection. Traditional injection needles cause significant vascular damage. Due to the histamine-releasing effect of sinomenine hydrochloride, if the drug accidentally enters the bloodstream, patients may experience transient rashes, itching, rapid heartbeat, and decreased blood pressure.

[0003] In existing technologies, the beveled edge of ordinary needles is too sharp and has a large contact area with the soft tissue at the injection site, which can easily damage blood vessels and increase the risk of sinomenine hydrochloride entering the bloodstream. In addition, the needle length is generally available in two specifications: one is 0.5mm*40mm for superficial tissues and the other is 0.5mm*65mm for deep tissues. Different needles need to be changed each time depending on the situation, which can easily lead to mistakes for novice doctors. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a slope protection structure to deal with the hazards of debris flow, and to solve the technical problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0006] A targeted interventional injection needle includes a needle handle connected to a syringe and a needle tip connected to the needle handle. The needle handle and the needle tip are connected by a sliding assembly to allow the needle tip to slide axially within the needle handle in a limited manner. The needle tip includes a needle shaft connected to the sliding assembly and a needle tip integrally formed with the needle shaft. The needle tip is a rotating structure arranged axially. The needle shaft and the needle tip are provided with a flow channel for the inflow of liquid medication. The needle tip is provided with an injection hole that connects the flow channel and the outside. The edge of the injection hole near the flow channel is angled, and the angle is inclined from the edge of the injection hole towards the center of the injection hole from the inside to the outside. The edge of the injection hole near the outside is rounded.

[0007] According to one aspect of the above technical solution, any point on the outermost side of the rounded corner is flush with the surface it is located on.

[0008] According to one aspect of the above technical solution, the needle tip is arranged in a conical shape.

[0009] According to one aspect of the above technical solution, the sliding assembly includes a bushing fixed to the outer cylindrical surface of the needle bar, a nut threadedly connected to the bushing, and a housing rotatably connected to the nut.

[0010] According to one aspect of the above technical solution, the nut includes a contact portion and a rotating portion. The end of the outer shell near the needle bar is recessed to form a slot for the rotating portion to be inserted. The rotating portion is rotatably connected to the inner wall of the slot. The contact portion is located at the end of the rotating portion near the needle bar and is exposed to the outside. The rotating portion is provided with an internal thread, and the bushing is provided with an external thread that mates with the internal thread.

[0011] According to one aspect of the above technical solution, the housing is provided with a fixing block inside, and a constraint channel is provided through the fixing block for the bushing to pass through. The bushing is provided with a slider, and the side wall of the constraint channel is provided with a sliding groove for the slider to slide.

[0012] According to one aspect of the above technical solution, the end of the bushing near the outer shell and the end of the needle bar near the outer shell are flush.

[0013] According to one aspect of the above technical solution, the outer casing is provided with a positioning mark for determining the extension length of the needle.

[0014] According to one aspect of the above technical solution, the needle handle is orange.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] By replacing the needle tip with a non-beveled structure, in this embodiment the needle tip is set in a conical shape. Because this structure is a rotating body, its contact area with the tissue is small, thus reducing damage to blood vessels. An injection port is provided on the needle tip, with the edge of the injection port near the flow channel set at an angle. This structure allows the medication in the flow channel to flow more easily to the injection port, while the size on the side near the outside is not too large, thereby controlling the amount of medication flowing out and reducing discomfort to the patient during injection. By making the edge of the injection port near the outside rounded, the sharp edge of the injection port is prevented from cutting the tissue when the needle tip pierces it, thus reducing damage to blood vessels. The length of the needle shaft extending from the needle handle can be adjusted via a sliding component, allowing for adjustment of the needle shaft length during clinical use and preventing incorrect handling. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the fixed-point interventional injection needle in the first embodiment of this utility model;

[0018] Figure 2 for Figure 1 Internal structure diagram of the needle tip of the medium-sized needle;

[0019] Figure 3 for Figure 1 A schematic diagram of the structure at the tip of the needle;

[0020] Figure 4 for Figure 1 Exploded view of the structure;

[0021] Figure 5 for Figure 4 A schematic diagram of the combined structure of the needle rod, bushing, and nut;

[0022] Figure 6 for Figure 1 Schematic diagram of the top structure of the inner shell;

[0023] Explanation of key component symbols:

[0024] needle tip 21 Injection port 22 bevel 23 flow channel 24 Rounded corners 28 shell 11 Fixed block 12 Constrained Channel 13 bushing 26 external thread 27 Location marker 30 Contact Department 14 Rotating part 15 needle bar 25 slider 51 chute 52 sealing gasket 53

[0025] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this utility model. Detailed Implementation

[0026] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. Several embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this utility model will be more thorough and complete.

[0027] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0029] Please see Figures 1 to 6 The image shows a targeted interventional injection needle according to the first embodiment of this utility model, including a needle handle 10 connected to a syringe and a needle tip 20 connected to the needle handle 10. The needle handle 10 and the needle tip 20 are connected by a sliding assembly so that the needle tip 20 can slide axially within the needle handle 10 in a limited manner. The needle tip 20 includes a needle shaft 25 connected to the sliding assembly and a needle tip 21 integrally formed with the needle shaft 25. The needle tip 21 is a rotating body structure arranged axially. The needle shaft 25 and the needle tip 21 are provided with a flow channel 24 for the inflow of drug solution. The needle tip 21 is provided with an injection hole 22 that connects the flow channel 24 and the outside. The edge of the injection hole 22 near the flow channel 24 is set at an angle 23. The angle 23 is inclined from the edge of the injection hole 22 towards the center of the injection hole 22 from the inside to the outside. The edge of the injection hole 22 near the outside is set with a rounded corner 28.

[0030] Understandably, this utility model replaces the needle tip 20 with a structure without an oblique surface. In this embodiment, the needle tip 21 is set in a conical shape. Since this structure is a rotating body structure, the contact area between the needle tip 21 and the tissue is small, thus reducing the damage to blood vessels caused by the needle tip 21. By setting an injection hole 22 on the needle tip 21, wherein the edge of the injection hole 22 near the flow channel 24 is set at an oblique angle 23, this structure makes it easier for the liquid medicine in the flow channel 24 to flow to the injection hole 22, while the size on the side near the outside is not too large, thereby controlling the amount of liquid medicine flowing out and reducing the discomfort caused to the patient during injection. By setting the edge of the injection hole 22 near the outside to a rounded corner 28, when the needle tip 21 pierces the tissue, the sharp edge of the injection hole 22 is prevented from cutting the tissue, thereby reducing the damage to blood vessel tissue. The length of the needle bar 25 extending out of the needle handle 10 can be adjusted by the sliding component, which can adjust the length of the needle bar 25 in clinical practice and avoid incorrect handling.

[0031] Preferably, any point on the outermost side of the fillet 28 is flush with the surface it is located on.

[0032] Understandably, by making any point on the outermost side of the rounded corner 28 flush with its surface, the needle tip 21 will always be inserted stably along the smooth slope of the cone during the insertion process, and will not cause greater damage to the blood vessel tissue due to the protrusion on the outer side of the rounded corner 28 during the insertion process.

[0033] Specifically, the sliding assembly includes a bushing 26 fixed to the outer cylindrical surface of the needle bar 25, a nut threadedly connected to the bushing 26, and a housing 11 rotatably connected to the nut. The nut includes a contact portion 14 and a rotating portion 15. The end of the housing 11 near the needle bar 25 is recessed to form a slot for the rotating portion 15 to be inserted. The rotating portion 15 is rotatably connected to the inner wall of the slot. The contact portion 14 is located at the end of the rotating portion 15 near the needle bar 25 and is exposed to the outside. The rotating portion 15 has an internal thread, and the bushing 26 has an external thread 27 that mates with the internal thread. The housing 11 has a fixing block 12 inside, and a constraint channel 13 is provided through the fixing block 12 for the bushing 26 to pass through. The bushing 26 has a slider 51, and the side wall of the constraint channel 13 has a groove 52 for the slider 51 to slide. The end of the bushing 26 near the housing 11 is flush with the end of the needle bar 25 near the housing 11.

[0034] Understandably, the bushing 26 is fixed to the needle bar 25, and the nut is rotatably connected to the outer casing 11. When the length of the needle bar 25 needs to be adjusted, medical gloves are worn and the contact part 14 is rotated. The contact part 14 drives the rotating part 15 to rotate, which in turn drives the bushing 26 and the needle bar 25 to rise or fall through the threaded structure. Since the inner casing 11 has a constraint channel 13, and the bushing 26 is slidably connected to the sliding groove 52 on the side wall of the constraint channel 13 through the slider 51, the bushing 26 will only slide along the axial direction of the constraint channel 13 to drive the needle bar 25 and the needle tip 21 to move, thereby realizing the length adjustment of the needle 20. Preferably, a sealing gasket 50 is provided on the edge of the bushing 26 near the outer casing 11. This sealing gasket 50 also needs to cover the edge of the slider 51 to prevent the medicine from flowing out from the gap between the bushing 26 and the constraint channel 13 when the syringe is connected to the outer casing 11. After the injection, the needle 20 and the needle handle 10 can be discarded.

[0035] It should be noted that, during the design process, when the needle 20 exposed on the outside of the housing 11 is at its longest through the threaded structure, the bushing 26 and the needle bar 25 will not protrude from the constraint channel 13. The purpose is to leave space for the piston nozzle of the syringe to be embedded. When the needle 20 exposed on the outside of the housing 11 is at its shortest through the threaded structure, the bushing 26 and the needle bar 25 will not detach from the constraint channel 13, thus preventing the liquid from flowing directly out of the constraint channel 13.

[0036] Furthermore, the outer casing 11 is provided with a positioning mark 30 for determining the extension length of the needle 20; the needle handle 10 is orange.

[0037] Understandably, the device can be designed at the factory such that when the exposed needle 20 is at its shortest length due to the threaded structure, the exposed length is exactly 40mm; when the exposed needle 20 is at its longest length due to the threaded structure, the exposed length is exactly 65mm. This can be achieved by setting a limiting structure (not shown in the figure) at the bushing 26 and the rotating part 15. When the medical staff rotates the nut until the bushing 26 touches the limiting structure and cannot rotate, the needle 20 is at its longest or shortest length. The positioning mark 30 is used to align with the position of the injection hole, making it easier for the medical staff to grasp the injection direction, improving injection accuracy while meeting the injection needs of different sites. The reason why the needle handle 10 is orange is to make it easy to observe whether there is blood upon aspiration.

[0038] In summary, the targeted interventional injection needle in the above embodiments of this utility model can reduce the damage to vascular tissue caused by conventional needles, and the length of the needle can be adjusted more conveniently to cope with different projects.

[0039] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0040] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A targeted interventional injection needle, characterized in that, The syringe includes a needle handle connected to the syringe and a needle tip connected to the needle handle. The needle handle and the needle tip are connected by a sliding assembly to allow the needle tip to slide axially within the needle handle in a limited manner. The needle tip includes a needle shaft connected to the sliding assembly and a needle tip integrally formed with the needle shaft. The needle tip is a rotating structure arranged axially. The needle shaft and the needle tip are connected by a flow channel for the inflow of liquid medicine. The needle tip is provided with an injection hole that connects the flow channel and the outside. The edge of the injection hole near the flow channel is set at an angle. The angle is inclined from the edge of the injection hole to the center of the injection hole from the inside to the outside. The edge of the injection hole near the outside is rounded.

2. The targeted interventional injection needle according to claim 1, characterized in that, Any point on the outermost side of the rounded corner is flush with the surface it lies on.

3. The targeted interventional injection needle according to claim 1, characterized in that, The needle tip is cone-shaped.

4. The targeted interventional injection needle according to claim 1, characterized in that, The sliding assembly includes a bushing fixed to the outer cylindrical surface of the needle bar, a nut threadedly connected to the bushing, and a housing rotatably connected to the nut.

5. The targeted interventional injection needle according to claim 4, characterized in that, The nut includes a contact portion and a rotating portion. The end of the outer shell near the needle bar is recessed to form a slot for the rotating portion to be inserted. The rotating portion is rotatably connected to the inner wall of the slot. The contact portion is located at the end of the rotating portion near the needle bar and is exposed to the outside. The rotating portion is provided with an internal thread, and the bushing is provided with an external thread that mates with the internal thread.

6. The targeted interventional injection needle according to claim 4, characterized in that, The housing has a fixing block inside, and a constraint channel is provided through the fixing block for the bushing to pass through. The bushing is provided with a slider, and the side wall of the constraint channel is provided with a groove for the slider to slide.

7. The targeted interventional injection needle according to claim 5, characterized in that, The end of the bushing near the outer shell and the end of the needle bar near the outer shell are flush.

8. The targeted interventional injection needle according to claim 4, characterized in that, The outer casing is provided with a positioning mark for determining the extension length of the needle.

9. The targeted interventional injection needle according to claim 1, characterized in that, The needle handle is orange.

Images