A nested needle device for injectable medical fluid
By using a nested design for the release needle, the functions of injection and release are combined, which solves the problem of the single function of traditional needles and improves operational efficiency and safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUNAN UNIV OF CHINESE MEDICINE
- Filing Date
- 2025-03-11
- Publication Date
- 2026-07-24
AI Technical Summary
Traditional release needles have a single function and are difficult to switch flexibly during treatment, resulting in prolonged operation time and increased patient suffering.
A nested release needle was designed, combining injection and release functions. The release needle body is sleeved around the injection needle body to achieve switching between the two states, and has the ability to both inject drugs and release tissue.
It significantly reduces the number of procedures, alleviates patient suffering, and improves treatment efficiency and safety, especially for complex diseases.
Smart Images
Figure CN224540608U_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of medical device technology, specifically relating to a nested release needle that can inject liquid drugs. Background Technology
[0002] In clinical medicine, needles are widely used for procedures such as drug injection, soft tissue release, and lesion treatment. Traditional release needles often employ a single-tube design with limited functionality, such as only being able to perform release or cutting operations, making it difficult to flexibly switch functions during treatment. When encountering deep knots, cords, or abscesses, doctors need to frequently change instruments or perform multiple injections, which not only prolongs the operation time but also increases patient suffering and the risk of infection. Summary of the Invention
[0003] The technical problem to be solved by this application is to provide a nested loosening needle that can inject medication, so that the needle has both loosening and medication injection functions, significantly reducing the number of operations and reducing patient pain.
[0004] This application provides a nested release needle for injectable medication, comprising: Injection structure; An injection needle is disposed at the port of the injection structure for inserting into the skin and injecting medication; The release needle body has an inner through hole for being fitted around the outer periphery of the injection needle body to achieve switching between two states: the injection needle body being exposed and retracted into the release needle body. One end of the release needle body smoothly transitions into the injection needle body for piercing the skin.
[0005] Optionally, the injection needle body is provided with an external thread at one end for connection to the injection structure, and the release needle body is provided with an internal thread. The release needle body and the injection needle body are screwed together by the external thread and the internal thread.
[0006] Optionally, the injection needle body includes an insertion end, which is wedge-shaped and used to cut nodules and / or fascial adhesions.
[0007] Optionally, the width of the insertion end is 1mm-5mm.
[0008] Optionally, the injection needle body has a liquid outlet hole on its side wall, and the liquid outlet hole is close to the insertion end.
[0009] Optionally, the liquid outlet hole extends bidirectionally through the sidewall of the injection needle body.
[0010] Optionally, the liquid outlet is a circular hole with a diameter of 0.1 mm to 1 mm.
[0011] Optionally, one end of the injection needle body is inserted into the end of the injection structure.
[0012] Optionally, the end of the loosening needle body away from the injection structure has a conical surface, and the end wall of the inner through hole is clearance-fitted or interference-fitted with the outer wall of the injection needle body.
[0013] Optionally, the conical surface smoothly transitions to the end face of the loosening needle.
[0014] Optionally, the length of the injection needle body is 5cm-20cm, the length of the release needle body is 4cm-18cm, and the length of the injection needle body is greater than the length of the release needle body.
[0015] Optionally, the outer diameter of the loosening needle body is 0.2mm-3mm.
[0016] Optionally, the inner through hole is a circular hole with a diameter of 0.1mm-2.5mm.
[0017] Optionally, the injection structure includes a syringe and a piston rod inserted inside the syringe, the front end of the syringe including a port for introducing and discharging liquid medication.
[0018] The beneficial effects of this application are that, by fitting a release needle around the periphery of the injection needle, the release needle can be adjusted to move along the injection needle towards the injection structure, exposing the tip of the injection needle for easy skin insertion. As the needle penetrates deeper, the release needle also penetrates the skin until it reaches lesions such as nodules and fascial adhesions. The medication in the injection structure is then injected into these lesions through the injection needle. Alternatively, the release needle can be adjusted to move away from the injection structure, causing the tip of the injection needle to retract into the release needle body, allowing for manipulation techniques such as rocking to loosen muscles and tendons. This composite cannula design significantly reduces the number of procedures required for needle release and medication injection, minimizing patient discomfort, while simultaneously improving the treatment efficiency and safety for complex conditions such as connective tissue diseases, osteoarthritis, and soft tissue lesions. This design fills a gap in existing multifunctional needles and has significant clinical application value. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the structure of the release needle provided in the embodiments of this application; Figure 2 for Figure 1 Enlarged view of area A in the image; Figure 3 This is a schematic diagram of the exploded structure of the release needle provided in the embodiments of this application; Figure 4 for Figure 3 Enlarged view of area B in the image; Figure 5 for Figure 3 Enlarged view of area C in the image.
[0020] In the diagram: 100, injection structure; 110, syringe; 111, port; 120, piston rod; 200, injection needle body; 210, external thread; 220, insertion end; 230, liquid outlet; 300, release needle body; 310, internal through hole; 320, conical surface. Detailed Implementation
[0021] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.
[0022] like Figure 1-5 As shown, this application provides a nested release needle for injectable medication, comprising: an injection structure 100, an injection needle body 200, and a release needle body 300; wherein, the injection needle body 200 is disposed on the port 111 of the injection structure 100 for inserting into the skin and injecting medication; the release needle body 300 has an inner through hole 310 for fitting around the outer periphery of the injection needle body 200 to achieve switching between two states: the injection needle body 200 exposed and retracted into the release needle body 300; one end of the release needle body 300 smoothly transitions with the injection needle body 200 for inserting into the skin.
[0023] Compared with the prior art, the nested release needle with injectable drug solution provided in this application, by fitting the release needle body 300 around the outer periphery of the injection needle body 200, can be adjusted to move the release needle body 300 along the injection needle body 200 toward the injection structure 100, so that the front end of the injection needle body 200 is exposed, making it easier to pierce the skin. As the needle penetrates deeper, the release needle body 300 also penetrates the skin until it reaches the lesion such as nodules and fascial adhesions. The drug solution in the injection structure 100 is injected into the lesion such as nodules and fascial adhesions through the injection needle body 200. The release needle body 300 can also be adjusted to move along the injection needle body 200 away from the injection structure 100, so that the front end of the injection needle body 200 is retracted into the release needle body 300, so that the release needle body 300 can be used for muscle release techniques such as shaking. Thus, the composite cannula design enables the needle to perform both release and injection functions, significantly reducing the number of procedures and patient discomfort, while simultaneously improving the treatment efficiency and safety for complex conditions such as connective tissue diseases, osteoarthritis, and soft tissue lesions. This design fills a gap in existing multifunctional needle technology and has significant clinical application value.
[0024] In one possible implementation, the injection needle body 200, connected to the injection structure 100, has an external thread 210 at one end, while the release needle body 300 has an internal thread. The release needle body 300 and the injection needle body 200 are screwed together via the external thread 210 and the internal thread, preventing accidental axial movement between them and reducing operational risks. This threaded connection structure allows for quick switching between the hollow release needle body 300 and the injection needle body 200. During the release process, the injection needle body 200 can be unscrewed at any time to cut the nodules, and then the cannula can be screwed back in to continue the release operation.
[0025] In one possible implementation, the injection needle body 200 includes an insertion end 220, which is wedge-shaped and used for cutting nodules and / or fascial adhesions. Specifically, the wedge-shaped insertion end 220 is blade-shaped or axe-shaped, and its flattened design facilitates cutting. The injection needle body 200 can be used to cut nodules and cords without the release needle body 300, and can also be used as a release needle after attaching cords. Both uses allow for the attachment of a syringe to inject medication at the site of pain. Medication can be injected while cutting cords and nodules or performing release techniques, reducing the pain of secondary injections compared to traditional needles. Clinically, when encountering nodules during release, they often cannot be resolved by release alone. This release needle, through a bolt-type design, allows the wedge-shaped insertion end 220 to be unscrewed for cutting. After cutting, the insertion end 220 can be screwed back into the cannula for continued release.
[0026] It should be noted that even when the insertion end 220 is a typical pointed shape, it is still possible to perform a wedge-shaped operation, although the convenience and accuracy will be reduced.
[0027] In one possible implementation, the width of the insertion end 220 is 1mm-5mm. For example, the width of the insertion end 220 can be any typical but non-limiting point value or a range between any two point values, such as 1mm, 2mm, 2.5mm, 3mm, 4mm, 5mm.
[0028] In one possible implementation, such as Figure 2 and Figure 4 As shown, the injection needle body 200 has a liquid outlet hole 230 on its side wall, and the liquid outlet hole 230 is close to the insertion end 220 to facilitate the injection of medicine.
[0029] In one possible implementation, the dispensing orifice 230 bidirectionally penetrates the sidewall of the injection needle body 200. This increases the contact area between the medication and the lesion, and accelerates the injection speed, which is beneficial for improving treatment efficacy and reducing patient discomfort.
[0030] In one possible implementation, the liquid outlet 230 is a circular hole with a diameter of 0.1 mm to 1 mm. For example, the diameter of the liquid outlet 230 can be any typical but non-limiting point value or an interval between any two point values, such as 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.8 mm, 1 mm.
[0031] In one possible implementation, one end of the injection needle 200 is inserted into the end of the injection structure 100. This facilitates the assembly and disassembly of the injection needle 200, improving ease of use.
[0032] In one possible implementation, such as Figure 2 and Figure 5 The end of the release needle 300 furthest from the injection structure 100 has a conical surface 320, and the end wall of the inner through hole 310 is either clearance-fitted or interference-fitted with the outer wall of the injection needle 200. Thus, the conical surface 320 facilitates the release needle 300's insertion into the skin and body tissues, and also helps reduce patient pain. The clearance-fitted or interference-fitted inner through hole 310 with the outer wall of the injection needle 200 forms a seal-like structure, which reduces blood flow into the inner through hole 310.
[0033] In one possible implementation, the conical surface 320 smoothly transitions to the end face of the release needle body 300. This further improves the ease with which the release needle body 300 penetrates the skin and body tissues, and also further reduces patient pain.
[0034] In one possible implementation, the length of the injection needle 200 is 5cm-20cm, and the length of the release needle 300 is 4cm-18cm, with the length of the injection needle 200 being greater than the length of the release needle 300. For example, the length of the injection needle 200 can be any typical but non-limiting point value or a range between any two points, such as 5cm, 6cm, 7cm, 10cm, 15cm, or 20cm; the length of the release needle 300 can be any typical but non-limiting point value or a range between any two points, such as 4cm, 5cm, 6cm, 7cm, 10cm, 15cm, or 18cm.
[0035] In one possible implementation, the outer diameter of the release needle 300 is 0.2mm-3mm. For example, the outer diameter of the release needle 300 can be any typical but non-limiting point value or an interval between any two point values, such as 0.2mm, 0.5mm, 1mm, 2mm, 3mm.
[0036] In one possible implementation, the inner through hole 310 is a circular hole with a diameter of 0.1mm-2.5mm. For example, the diameter of the inner through hole 310 can be any typical but non-limiting point value or a range between any two point values, such as 0.1mm, 0.2mm, 0.5mm, 1mm, 2mm, 2.5mm.
[0037] In one possible implementation, the injection structure 100 includes a syringe 110 and a piston rod 120 inserted within the syringe 110. The front end of the syringe 110 includes a port 111 for introducing or discharging medication. Thus, medication is drawn in or injected from the injection needle body 200 connected to the port 111 by pushing or pulling the piston rod 120.
[0038] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of protection of this application is limited to these examples; within the framework of this application, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of one or more embodiments of this application as described above, which are not provided in detail for the sake of brevity.
[0039] One or more embodiments in this application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of this application. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of one or more embodiments in this application should be included within the protection scope of this application.
Claims
1. A nested release needle for injectable medication, characterized in that, include: Injection structure (100); The injection needle body (200) is disposed on the port (111) of the injection structure (100) for inserting into the skin and injecting medication; The release needle body (300) has an inner through hole (310) for being fitted around the outer periphery of the injection needle body (200) to achieve switching between two states: the injection needle body (200) being exposed and retracted into the release needle body (300). One end of the release needle body (300) is smoothly transitioned to the injection needle body (200) for piercing the skin.
2. The loosening needle according to claim 1, characterized in that, The injection needle body (200) is provided with an external thread (210) for connecting to one end of the injection structure (100), and the release needle body (300) is provided with an internal thread. The release needle body (300) and the injection needle body (200) are screwed together by the external thread (210) and the internal thread.
3. The loosening needle according to claim 2, characterized in that, The injection needle body (200) includes an insertion end (220) which is wedge-shaped and used to cut nodules and / or fascial adhesions.
4. The loosening needle according to claim 3, characterized in that, The width of the insertion end (220) is 1mm-5mm.
5. The loosening needle according to claim 3 or 4, characterized in that, The injection needle body (200) has a liquid outlet hole (230) on its side wall, and the liquid outlet hole (230) is close to the insertion end (220).
6. The loosening needle according to claim 5, characterized in that, The liquid outlet (230) penetrates the side wall of the injection needle body (200) in both directions; And / or, the liquid outlet (230) is a circular hole with a diameter of 0.1mm-1mm.
7. The loosening needle according to any one of claims 1-4, 6, characterized in that, One end of the injection needle body (200) is inserted into the end of the injection structure (100); And / or, the end of the release needle body (300) away from the injection structure (100) has a conical surface (320), and the end wall of the inner through hole (310) is clearance-fitted or interference-fitted with the outer wall of the injection needle body (200).
8. The loosening needle according to claim 7, characterized in that, The conical surface (320) and the end face of the loosening needle body (300) transition smoothly.
9. The loosening needle according to any one of claims 1-4, 6, and 8, characterized in that, The length of the injection needle body (200) is 5cm-20cm, the length of the release needle body (300) is 4cm-18cm, and the length of the injection needle body (200) is greater than the length of the release needle body (300); And / or, the outer diameter of the loosening needle body (300) is 0.2mm-3mm; And / or, the inner through hole (310) is a round hole with a diameter of 0.1mm-2.5mm.
10. The loosening needle according to any one of claims 1-4, 6, and 8, characterized in that, The injection structure (100) includes a syringe (110) and a piston rod (120) inserted inside the syringe (110). The front end of the syringe (110) includes a port (111) for injecting or withdrawing liquid medication.