Medical puncture needle without internal wound
By designing the needle tip of the non-invasive medical puncture needle to have an arc-shaped structure with alternating conical segments and pyramidal segments, the problem of cutting damage to tissue by the puncture needle is solved, and a safe and non-invasive puncture effect is achieved.
Patent Information
- Application Number
- CN202422680560.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-04
- Publication Date
- 2025-09-09
- Estimated Expiration
- 2034-11-04
AI Technical Summary
The tip of the existing puncture needle is prismatic with sharp edges, which can easily damage surrounding tissues during the puncture process, leading to complications such as bleeding and infection.
A non-invasive medical puncture needle is designed, the needle tip of which has alternately arranged conical sections and pyramidal sections, and the circumference is angularly arc-shaped, forming a semi-convex structure, which maintains the sharpness of the puncture and reduces cutting damage to tissues.
During the puncture process, the damage to the blood vessels and nerve-rich areas is minimized, the operation safety is improved, cutting is avoided, and the puncture is ensured to be smooth and non-invasive.
Smart Images
Figure CN223311226U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of medical instruments, in particular to a non-invasive medical puncture needle. Background Art
[0002] Biopsy needles are precision medical devices used primarily in medical diagnostic and treatment procedures, such as biopsy, cell extraction, drug injection, and local anesthesia. They are widely used during surgery and examinations, particularly in pain management and interventional medicine. They are typically made of stainless steel or other biocompatible materials to ensure safety and effectiveness during use.
[0003] Existing puncture needles have a prismatic tip and a sharp, linear edge. This design provides good penetration during puncture. However, it also presents potential problems: during puncture, the sharp edge may damage surrounding blood vessels, nerves, or other sensitive tissues when penetrating tissue, potentially leading to bleeding, infection, or other complications. Utility Model Content
[0004] The technical problem to be solved by the utility model is to provide a non-endoinvasive medical puncture needle to overcome the problem that the puncture needle in the prior art has a prismatic tip and sharp edges, which may damage other tissue defects during the puncture process.
[0005] The utility model solves the above technical problems through the following technical solutions:
[0006] A non-invasive medical puncture needle comprises a needle tube portion and a needle tip portion. The needle tip portion gradually converges from bottom to top to form a pointed end, and the circumference of the needle tip portion is formed with alternately arranged conical sections and pyramidal sections.
[0007] In this solution, the aforementioned structure is employed. The needle tip features alternating conical and pyramidal segments, forming an arc-shaped circumference. Each arc-shaped surface connects to a flat prism, creating a semi-convex structure with one straight surface and one curved surface. Compared to conventional conical and pyramidal structures, this structure offers the sharpness and ease of puncture, while its convex ridges prevent cutting surrounding tissue during insertion. This minimizes damage to areas rich in blood vessels and nerves, making the procedure safer.
[0008] Preferably, the needle tube portion includes a needle core and a tube wall wrapping the needle core, and the needle tip portion is located at the end of the needle core and exposed at the tube wall.
[0009] In this solution, the aforementioned structure is employed, with the needle tube portion serving as the main body of the puncture needle, which is cylindrical in shape. The needle tube portion extends the length of the puncture needle, allowing it to be inserted into various locations. The tube wall also protects the needle core.
[0010] Preferably, the outer periphery of the bottom of the conical section is flush with the outer periphery of the end of the needle core;
[0011] The bottom periphery of the pyramid segment is located within the end periphery of the needle core.
[0012] In this solution, the above structure is adopted, and the arc of the conical section can push the tissue to both sides during insertion without damaging the tissue, while the pyramidal section converges on the inner side, which increases the sharpness without forming a convex edge that is easy to cut.
[0013] Preferably, the end of the tube wall gradually converges from the outer circumference to the needle tip to form an arcuate portion.
[0014] In this solution, the above structure is adopted, and the end of the tube wall is a curved surface, which is conducive to smooth injection of the medicine during the injection, and will not cause injection failure even if the patient's internal pressure is high.
[0015] Preferably, the needle tip portion includes three non-adjacent cone segments and three non-adjacent pyramid segments.
[0016] In this solution, the above-mentioned structure is adopted, which can achieve a balance between sharpness and no cutting.
[0017] Preferably, the projection angles of the conical segment and the pyramid segment on the bottom surface of the needle tip portion are comparable.
[0018] In this solution, the above structure is adopted, and the needle tip part is divided into six equal parts, each part is of equal size, and is more balanced.
[0019] Preferably, the tip of the needle tip portion is a blunt puncture needle tip.
[0020] This solution utilizes the aforementioned structure and a blunt needle tip. During puncture, the tip is rounded, not prismatic. This allows for uniform tissue dispersal and sharp incision, achieving a non-invasive approach. Even if a blunt needle tip strikes a nerve head-on, the rounded bevel pushes the nerve sideways, minimizing the cutting force.
[0021] Preferably, the angle of the tip is between 92 and 115 degrees, and at least 92 degrees.
[0022] In this solution, the above structure is adopted, based on the clinical experience and big data analysis of the inventors, and the angle of the tip of the puncture needle is about 100 degrees, which does not reduce the sharpness of the tip during the puncture process, making the puncture process less obstructed and smoother.
[0023] Preferably, the needle tip and the needle core are integrally formed.
[0024] In this solution, the above structure is adopted, and the needle tip and the needle core are integrally formed and protected by the tube wall. The needle tip protrudes from the tube wall to facilitate puncture.
[0025] Preferably, the angle of the edge where the conical segment and the pyramid segment meet is between 110 degrees and 170 degrees.
[0026] In this solution, the above structure is adopted, and this angle further makes the contact edges of the cone segment and the pyramid segment not sharply protruding, further avoiding cutting.
[0027] Preferably, the height of the needle tip portion protruding relative to the needle tube portion is between 0.21 and 0.32 mm.
[0028] In this solution, the above structure is adopted. This height range is derived based on the big data of medical practice and has the best puncture effect.
[0029] Preferably, the non-invasive medical puncture needle further comprises a needle tail portion, the needle tail portion is provided with a medicine assembly hole, and the medicine assembly hole is provided with an internal thread.
[0030] In this solution, the above structure is adopted, and when injecting medicine, the syringe needs to be screwed into the medicine assembly hole at the tail end to seal the injection environment, thereby avoiding the risk of external infection and drug leakage.
[0031] Preferably, the needle tube portion is further provided with a depth limiter.
[0032] In this solution, the above structure is adopted, and during puncture, the puncture route enters the target area and is fixed by the depth limiter on the puncture needle body after reaching the target.
[0033] The positive progress of this utility model lies in the following: the needle tip of the non-invasive medical puncture needle of this utility model has alternating conical and pyramidal sections, and its peripheral surface is angularly arcuate. That is, each arcuate surface is connected to an angular plane, forming a semi-convex structure with one side being a straight plane and the other side being a curved surface. Compared with traditional conical and pyramidal structures, this structure has the sharpness of traditional puncture needles for easy puncture, while the convex ridges do not cut surrounding tissue during needle insertion, which can minimize damage to areas rich in blood vessels and nerves, making the operation safer. BRIEF DESCRIPTION OF THE DRAWINGS
[0034] Figure 1 This is a schematic structural diagram of a non-invasive medical puncture needle according to an embodiment of the present invention.
[0035] Figure 2This is a schematic cross-sectional view of the non-invasive medical puncture needle according to an embodiment of the present invention.
[0036] Figure 3 for Figure 1 A partial enlarged view of .
[0037] Figure 4 This is a schematic diagram of the top-down structure of the non-invasive medical puncture needle according to an embodiment of the present utility model.
[0038] Description of reference numerals:
[0039] Needle tip 1
[0040] Conical segment 11
[0041] Pyramid segment 12
[0042] Tip 13
[0043] Needle tube 2
[0044] Needle core 21
[0045] Pipe wall 22
[0046] Arc surface 221
[0047] Medicine assembly hole 222 DETAILED DESCRIPTION
[0048] A preferred embodiment is given below, and the present invention is described more clearly and completely in conjunction with the accompanying drawings.
[0049] like Figure 1 As shown, this embodiment provides a non-invasive medical puncture needle, which includes a needle tube portion 2 and a needle tip portion 1. The needle tip portion 1 gradually converges from bottom to top to form a tip 13, and the circumferential surface of the needle tip portion 1 is formed with alternating conical segments 11 and pyramidal segments 12. The needle tip portion 1 of the puncture needle has alternating conical segments 11 and pyramidal segments 12, and its circumferential surface is in an angular arc shape, that is, each arc surface is connected to an angular plane, so that a semi-convex structure with a straight plane on one side and a curved surface on the other side is formed between the two. Compared with the traditional conical structure and pyramidal structure, this structure has the sharpness of the traditional puncture needle for easy puncture, and its convex ridges will not cut the surrounding tissues at all during the needle insertion process, which can minimize the occurrence of damage to areas rich in blood vessels and nerves, making the operation safer. In this embodiment, as Figure 2 As shown, the needle tip 1 is a cone that protrudes relative to the needle tube 2, and the height d1 is 0.3 mm. In other embodiments, any length between 0.21 mm and 0.32 mm can also be selected. Figure 4As shown, the diameter of the bottom cross section of the needle tip 1 is 0.42 mm, and the length of the bottom arc edge of the arc segment is 0.21 mm. These values are derived from big data in medical practice and have the best puncture effect.
[0050] like Figure 2 As shown, the needle tube portion 2 includes a needle core 21 and a tube wall 22 that wraps the needle core 21. The needle tip portion 1 is located at the end of the needle core 21 and is exposed on the tube wall 22. The needle tube portion 2 is the main body of the puncture needle and is cylindrical in shape. The needle tube portion 2 can extend the length of the puncture needle so that the puncture needle can be inserted into different positions. At the same time, the tube wall 22 is provided to protect the needle core 21. In this embodiment, the thickness ratio of the needle core 21 to the tube wall 22 is 2:1. That is, the thickness of the tube wall 22 is half of the needle core 21. Specifically, the needle core 21 is cylindrical, and its thickness is the diameter of the cylindrical cross section, which is 0.42 mm, which is consistent with the diameter of the bottom surface of the needle tip portion 1 to form a whole. The thickness of the tube wall 22 is half of the diameter of the needle core 21, that is, 0.42 mm, so that the thickness of the entire puncture needle is about 0.85 mm. In this embodiment, the needle tip 1 and the needle core 21 are integrally formed and protected by the tube wall 22 , and the needle tip 1 protrudes from the tube wall 22 to facilitate puncture.
[0051] like Figure 3 As shown, the bottom periphery of the conical segment 11 is flush with the end periphery of the needle core 21. The bottom periphery of the pyramidal segment 12 lies within the end periphery of the needle core 21. The arc of the conical segment 11 pushes tissue apart during insertion without damaging it, while the pyramidal segment 12 converges inward, increasing sharpness without forming a convex edge that could easily cut.
[0052] like Figures 2 to 4 As shown, the end of the tube wall 22 gradually converges from the outer circumference to the needle tip 1 to form a curved surface 221. The tube wall 22 is located at one end of the needle tip 1 to form a curved surface, wherein the side close to the needle tip 1 has a smaller diameter, while the side away from the needle tip 1 has a larger diameter. The overall height of the curved surface 221 is 0.63mm, and its top has a flat surface with a diameter of 0.44mm. The diameter of the bottom surface of the needle tip 1 is 0.42mm, so a small step is formed on the table. The end of the tube wall 22 is a curved surface, which is conducive to the smooth injection of the drug during the injection. Even if the patient's internal pressure is high, it will not cause injection failure.
[0053] like Figure 4As shown, the needle tip 1 includes three non-adjacent conical segments 11 and three non-adjacent pyramidal segments 12. The projection angles of the conical segments 11 and the pyramidal segments 12 on the bottom surface of the needle tip 1 are comparable. The needle tip 1 is divided into six equal parts, and each part is of comparable size. This structure can strike a balance between sharpness and no cutting. The cone at the base of the needle tip is divided into six equal parts, and three non-adjacent 1 / 6 arcs are taken to form a triangular slope. The remaining three 1 / 6 arcs are not processed. The structure of the needle tip 1 in this embodiment is similar to selecting three non-adjacent 1 / 6 arc segments on a cone for cutting to form three triangular section planes. Among them, the section of each triangle forms a pyramidal segment 12. In this embodiment, the top view of the cutting surface around the puncture is an equilateral triangle with a side length of 0.42 mm.
[0054] In the embodiment, the number and size of the cone segments 11 and the pyramid segments 12 may also be adjusted.
[0055] For example, in one embodiment, two cone segments 11 and two pyramid segments 12 may be provided, or four cone segments 11 and four pyramid segments 12 may be provided, as long as each cone segment 11 is adjacent to a pyramid segment 12.
[0056] In another embodiment, while the number remains unchanged, the sizes of the conical segment 11 and the pyramidal segment 12 can be adjusted, such as by making the conical segment 11 larger or making the pyramidal segment 12 larger.
[0057] In this embodiment, the tip 13 of the needle tip 1 is a blunt puncture needle tip. Specifically, it is about 100 degrees. With a blunt needle tip, during the puncture process, the needle tip head is arc-shaped, not prismatic. During the puncture process, the tissue can be pushed apart evenly and cut sharply, thereby achieving the purpose of non-invasiveness. During the puncture process of the blunt needle tip, even if the blood vessel nerve is pierced from the front, the blood vessel nerve can be pushed to the side due to the rounded bevel, and the cutting force is almost zero. Figure 2 As shown, the angle a of the tip 13 of the puncture needle is 100 degrees, which does not reduce the sharpness of the tip 13 during the puncture process, making the puncture process less obstructed and smoother. In other embodiments, the angle a can also be selected between 92 and 115 degrees.
[0058] In this embodiment, the angle of the edge where the conical segment 11 and the pyramidal segment 12 meet is 150 degrees. This angle further reduces the sharp protrusion of the contact edge between the conical segment 11 and the pyramidal segment 12, further preventing cutting. In other embodiments, any angle between 110 and 170 degrees may be selected.
[0059] like Figure 2As shown, the non-invasive medical puncture needle also includes a tail portion, which is provided with a medication assembly hole 222. This hole 222 is internally threaded. When injecting medication, the syringe is screwed into the tail portion of the needle to seal the injection environment, thus avoiding the risk of external infection and drug leakage.
[0060] In this embodiment, the needle tube portion 2 is further provided with a depth stopper (not shown). During puncture, the puncture path enters the target area. After reaching the target, it is fixed by the depth stopper on the puncture needle body. The depth stopper adopts the current scale-type depth stopper, but other conventional depth stoppers can also be used.
[0061] Specifically, the needle tail is made of medical PVC material and is about 2 cm long, so as to make the tube wall 22 as stable as possible. The cross-sectional diameter of the tail end is about 8 mm, and a medicine assembly hole 222 is formed. The medicine assembly hole 222 contains a spiral dog tooth design for sealing.
[0062] When using the non-invasive medical puncture needle of this embodiment, the puncture path is first designed and the patient's skin is disinfected. After the patient is anesthetized, the skin is punctured with a sharp needle. The puncture needle then enters along the opening in the puncture. The needle then proceeds to the target area according to the puncture path. Once at the target site, the depth stop on the puncture needle body secures the needle to the skin. The needle can then be used for injection at the target site. The needle gently separates the tissue during insertion, providing deep protection in the critical area.
[0063] Although specific embodiments of the present invention have been described above, those skilled in the art will appreciate that these are merely illustrative and that the scope of protection of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, and such changes and modifications are intended to fall within the scope of protection of the present invention.
Claims
1. A non-invasive medical puncture needle, characterized in that: The needle tip comprises a needle tube portion and a needle tip portion. The needle tip portion gradually converges from bottom to top to form a tip. Cone segments and pyramid segments are alternately formed on the circumference of the needle tip portion.
2. The non-invasive medical puncture needle according to claim 1, characterized in that: The needle tube portion includes a needle core and a tube wall wrapping the needle core, and the needle tip portion is located at the end of the needle core and exposed on the tube wall.
3. The non-invasive medical puncture needle according to claim 2, characterized in that: The outer periphery of the bottom of the conical section is flush with the circumference of the end of the needle core; The bottom periphery of the pyramid segment is located within the end periphery of the needle core.
4. The non-invasive medical puncture needle according to claim 2, characterized in that: The end of the tube wall gradually converges from the outer circumference to the needle tip to form an arcuate portion.
5. The non-invasive medical puncture needle according to claim 1, characterized in that: The needle tip portion includes three non-adjacent cone segments and three non-adjacent pyramid segments.
6. The non-invasive medical puncture needle according to claim 5, characterized in that: The projection angles of the conical segment and the pyramid segment on the bottom surface of the needle tip portion are comparable.
7. The non-invasive medical puncture needle according to claim 1, characterized in that: The tip of the needle tip portion is a blunt puncture needle tip.
8. The non-invasive medical puncture needle according to claim 7, characterized in that: The angle of the tip is between 92 and 115 degrees.
9. The non-invasive medical puncture needle according to claim 2, characterized in that: The needle tip and the needle core are integrally formed.
10. The non-invasive medical puncture needle according to claim 1, wherein: The angle of the edge where the cone segment and the pyramid segment meet is between 110 degrees and 170 degrees.
11. The non-invasive medical puncture needle according to claim 1, characterized in that: The height of the needle tip portion protruding relative to the needle tube portion is between 0.21 and 0.32 mm.
12. The non-invasive medical puncture needle according to claim 1, wherein: The non-invasive medical puncture needle further comprises a needle tail portion, the needle tail portion is provided with a medicine assembly hole, and the medicine assembly hole is provided with an internal thread.
13. The non-invasive medical puncture needle according to claim 1, wherein: The needle tube portion is also provided with a depth limiter.