A low trauma puncture needle

Abstract

The application relates to the technical field of medical equipment, in particular to a low-damage puncture needle, which comprises a needle seat assembly connected and fixed with a needle tube, a lining core seat assembly, and the lining core seat assembly is detachably connected with the needle seat assembly, so that one end of the needle seat assembly can slide in the needle seat assembly and the needle tube; the needle seat assembly comprises a needle seat; the needle seat is coaxially connected and fixed with the needle tube; a limiting cylinder is coaxially fixedly connected with the needle seat, and one end of the limiting cylinder is connected with the needle tube; a first driving ring and a second driving ring are rotationally connected with the upper and lower ends of the side wall of the needle seat respectively. The position of the magnet arranged on the second magnetic attraction ring is controlled by twisting the second driving ring to magnetically attract and fix or release the blunt head cover, two groups of blunt head covers wrap the sharp corners, the needle tube is convenient to use when contacting with human tissues, the lining core head is converted from a sharp head to a blunt head or from a sharp head to a blunt head in the needle seat, and two groups of lining cores are used to drive the sharp head or the blunt head to be pulled out or inserted on the needle seat.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a low-damage puncture needle. Background Technology

[0002] The puncture needle, when used in conjunction with other medical devices, can directly reach the pain point and eliminate patient pain. It is an indispensable medical device in hospitals and can be used to treat intervertebral disc puncture, joint puncture, muscle pain point puncture, drug injection, radiofrequency ablation, etc.

[0003] In the existing technology, when replacing the pointed or blunt tip of the liner, two sets of liners are needed to drive the pointed or blunt tip back and forth on the needle hub to replace the pointed or blunt tip of the liner. The repeated pulling and inserting action requires precise alignment with the needle hub interface, which can easily cause a slight displacement between the original needle tube and the human tissue insertion area.

[0004] Therefore, a low-damage puncture needle is proposed to solve the problems mentioned above. Summary of the Invention

[0005] To achieve the above objectives, the present invention provides the following technical solution: a low-damage puncture needle, characterized in that it comprises;

[0006] The needle hub assembly is connected and fixed to the needle tube.

[0007] The liner seat assembly is detachably connected to the needle seat assembly, allowing one end of the liner seat assembly to slide within the needle seat assembly and the needle tube.

[0008] The needle hub assembly includes a needle hub; the needle hub is coaxially connected and fixed to the needle tube;

[0009] The limiting cylinder is coaxially and fixedly connected to the needle hub, and the limiting cylinder is connected to one end of the needle tube;

[0010] The first drive ring and the second drive ring are rotatably connected to the upper and lower ends of the needle seat sidewall, respectively.

[0011] The second drive ring is fixedly connected to the second magnetic ring, and the second magnetic ring is arranged around the outer peripheral wall of the embedded cavity.

[0012] The position of the magnet on the second magnetic ring is controlled by twisting the second drive ring to magnetically fix or release the blunt tip sleeve. The two sets of blunt tip sleeves wrap around the sharp corner, which makes it convenient for the needle core head to change from a sharp tip to a blunt tip or vice versa in the needle hub when the needle comes into contact with human tissue. This avoids the need to use two sets of needle cores to drive the sharp or blunt tip back and forth on the needle hub when changing the sharp or blunt tip of the needle core.

[0013] In one possible implementation, the embedding cavity is connected to the limiting cylinder, and the limiting cylinder has embedding cavities at both ends. The outer edges of the two sets of embedding cavities are hollowed out near the surface of the second magnetic ring. A blunt-headed sleeve is slidably provided in both sets of embedding cavities. The blunt-headed sleeve has a magnetic attraction area. The upper end of the blunt-headed sleeve protrudes outward to form a protruding area. A magnet is provided on the surface of the protruding area.

[0014] In one possible implementation, the first drive ring is fixedly connected to the first magnetic ring, the first magnetic ring is wrapped around the outer end of the limiting cylinder, magnets are embedded at the four corners of the surface of the first magnetic ring, and an insertion component is embedded in the side wall of the limiting cylinder at the same height as the first magnetic ring.

[0015] By twisting the first drive ring, the position of the magnet on the first magnetic ring is controlled to magnetically attract or release the inner cylinder, which facilitates the insertion of multiple sets of inner cylinders into multiple sets of insertion cavities and completes the fixing or disassembly of the liner core.

[0016] In one possible implementation, the insertion component includes an outer cylinder, and the outer cylinder is embedded in the side wall of the limiting cylinder at the same height as the first magnetic ring.

[0017] In one possible implementation, an inner cylinder is slidably connected inside the outer cylinder. The inner cylinder is fixedly connected to one end of a return spring, and the other end of the return spring is fixedly connected to the side wall of the outer cylinder. A magnet for magnetic attraction with the magnet on the first magnetic ring is connected to the side wall of the inner cylinder near the end of the return spring.

[0018] In one possible implementation, the core support assembly includes a core support, which is fixedly connected to the core.

[0019] The liner is slidably inserted into the needle hub assembly and the needle tube, and a limiting strip is fixedly connected to the liner.

[0020] In one possible implementation, an insertion cavity is embedded around the outer peripheral wall of the liner, and a sharp corner is provided at the end of the liner away from the liner seat.

[0021] In one possible implementation, the sharp corner consists of three sets of inclined planes, each with a 120-degree inclination angle, which reduces damage to the tissue when the sharp corner is inserted into human tissue.

[0022] In one possible implementation, the connection between the sharp corner and the core is recessed inward to form a magnetic cavity, and the side wall of the magnetic cavity is provided with a magnet that is magnetically attracted to the magnet on the protruding area.

[0023] In one possible implementation, an insulating layer is provided on the outer surface of the liner core, and a conductive wire is provided between the insulating layer and the outer peripheral wall of the liner core;

[0024] The liner is hollow inside, and the liner, magnetic cavity and sharp corner are connected by welding. A wire is installed inside the liner.

[0025] Compared with the prior art, the present invention provides a low-damage puncture needle, which has the following beneficial effects:

[0026] 1. The present invention uses a core with a pointed corner composed of three sets of inclined surfaces, each set of inclined surfaces having an inclination angle of 120 degrees, so that the pointed corner can reduce damage to human tissue when inserted into human tissue.

[0027] 2. The present invention controls the position of the magnet on the first magnetic ring by twisting the first drive ring to magnetically attract or release the inner cylinder, which facilitates the insertion of multiple sets of inner cylinders into multiple sets of insertion cavities and completes the fixing or disassembly of the lining core.

[0028] 3. This invention controls the position of the magnet on the second magnetic ring by twisting the second drive ring to magnetically fix or release the blunt tip sleeve. The two sets of blunt tip sleeves wrap around the sharp corner, which makes it convenient for the needle core head to change from a sharp tip to a blunt tip or vice versa in the needle holder when the needle comes into contact with human tissue. This avoids the need to use two sets of needle cores to drive the sharp or blunt tip back and forth on the needle holder when changing the sharp or blunt tip of the needle core.

[0029] 4. The present invention uses a blunt-head sleeve to wrap the sharp corner inside, and can reduce the number of liner seats and liner cores used, reducing the original two sets to one set. Attached Figure Description

[0030] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0031] Figure 1 This is a schematic diagram of the planar structure of the present invention;

[0032] Figure 2 This is a schematic diagram of the sharp-corner structure of the present invention;

[0033] Figure 3 This is a schematic diagram of the needle seat assembly structure of the present invention;

[0034] Figure 4 This is a schematic diagram of the internal structure of the needle hub of the present invention;

[0035] Figure 5 This is a schematic diagram of the first and second driving ring structures of the present invention. Figure 1 ;

[0036] Figure 6 This is a schematic diagram of the first and second driving ring structures of the present invention. Figure 2 ;

[0037] Figure 7 This is a schematic diagram of the insertion component structure of the present invention.

[0038] In the diagram: 1. Needle hub assembly; 2. Needle tube; 3. Liner seat assembly;

[0039] 11. Needle holder; 12. Limiting cylinder; 13. First drive ring; 14. Second drive ring;

[0040] 131. First magnetic ring; 132. Magnet; 133. Insertion assembly;

[0041] 1331. Outer cylinder; 1332. Inner cylinder; 1333. Return spring;

[0042] 141. Second magnetic ring; 142. Embedded cavity; 143. Blunt head sleeve; 144. Magnetic attraction area; 145. Protruding area;

[0043] 31. Liner seat; 32. Liner; 33. Restriction strip; 34. Insertion cavity; 35. Magnetic suction cavity; 36. Sharp corner. Detailed Implementation

[0044] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0045] Please see Figure 1 - Figure 7 This embodiment of a low-damage puncture needle includes a needle hub assembly 1, which is fixedly connected to a needle tube 2, and a liner assembly 3, which is detachably connected to the needle hub assembly 1, allowing one end of the liner assembly 3 to slide within the needle hub assembly 1 and the needle tube 2. The outer surface of the needle tube 2 is coated with an insulating layer, which ensures that electrical signals are collected only through the contact point between the tip and the tissue, shielding interference signals that may be generated when other parts of the needle tube come into contact with tissue or body fluid, thereby improving the specificity and accuracy of signal detection.

[0046] The front part of needle 2 directly contacts the tissue. The front area of ​​needle 2 is a "direct bioelectric signal acquisition electrode" which can be used for nerve monitoring. Since the nerve will discharge after being punctured, the discharge of the nerve can be detected through the front part of needle 2. After the acquisition electrode collects the signal, it is transmitted to the external nerve monitoring device. After the nerve monitoring device analyzes the signal, it can determine whether the nerve has been punctured. Since the nerve in the tissue is in a fixed position, the puncture position can be determined through the nerve.

[0047] Furthermore, such as Figures 1-7 As shown, the surface of the needle tube 2 is processed with an ultrasonic reflection enhancement surface structure for use as an ultrasonic imaging element;

[0048] The needle hub assembly 1 includes a needle hub 11; the needle hub 11 is coaxially connected and fixed to the needle tube 2; the limiting cylinder 12 is coaxially fixed to the needle hub 11, and the limiting cylinder 12 is connected to one end of the needle tube 2; the upper and lower ends of the side wall of the needle hub 11 are respectively rotatably connected to a first driving ring 13 and a second driving ring 14.

[0049] In use, the user inserts the liner 32 into the limiting cylinder 12 and controls the position of the magnet 132 on the first magnetic ring 131 by twisting the first drive ring 13 to magnetically attract or release the inner cylinder 1332. This facilitates the insertion of multiple inner cylinders 1332 into multiple insertion cavities 34 and completes the fixing or disassembly of the liner 32. It also facilitates the quick switching of the tip 36 moving to the same height as the embedding cavity 142 and moving the tip 36 to the working area. Then, the user holds the needle holder 11 to perform puncture on the patient.

[0050] At the same time, such as Figures 1-7 As shown, the first drive ring 13 is fixedly connected to the first magnetic ring 131. The first magnetic ring 131 wraps around the outer end of the limiting cylinder 12. Magnets 132 are embedded in the four corners of the surface of the first magnetic ring 131. An insertion component 133 is embedded in the side wall of the limiting cylinder 12 at the same height as the first magnetic ring 131.

[0051] The insertion component 133 includes an outer cylinder 1331. The outer cylinder 1331 is embedded in the side wall of the limiting cylinder 12, which is at the same height as the first magnetic ring 131. The end of the outer cylinder 1331 near the first magnetic ring 131 is exposed at the outer end of the limiting cylinder 12, so as to facilitate magnetic attraction with the magnet 132.

[0052] The inner cylinder 1332 is slidably connected inside the outer cylinder 1331. The inner cylinder 1332 is fixedly connected to one end of the return spring 1333, and the other end of the return spring 1333 is fixedly connected to the side wall of the outer cylinder 1331. A magnet 132 is connected to the side wall of the inner cylinder 1332 near the return spring 1333 for magnetic attraction with the magnet 132 on the first magnetic ring 131.

[0053] Furthermore, such as Figures 1-7 As shown, the second drive ring 14 is fixedly connected to the second magnetic ring 141, and the second magnetic ring 141 is arranged around the outer peripheral wall of the embedded cavity 142.

[0054] The embedding cavity 142 is connected to the inner part of the limiting cylinder 12. The limiting cylinder 12 has embedding cavities 142 at both the front and rear ends. The outer edges of the two sets of embedding cavities 142 are hollow near the surface of the second magnetic ring 141. The blunt head sleeve 143 is slidably provided in the two sets of embedding cavities 142. The blunt head sleeve 143 is provided with a magnetic attraction area 144. The magnetic attraction area 144 is used to magnetically attract the magnet on the second magnetic ring 141. The upper end of the blunt head sleeve 143 protrudes outward to form a protruding area 145. The surface of the protruding area 145 is provided with a magnet for magnetically attracting the magnetic attraction cavity 35.

[0055] Specifically, by twisting the second drive ring 14, the position of the magnet 132 on the second magnetic ring 141 is controlled to magnetically fix or release the blunt head sleeve 143, and the sharp corner 36 on the liner 32 is moved upward to the same height as the blunt head sleeve 143, so that the protruding area 145 on the blunt head sleeve 143 can be connected and fixed to the magnetic cavity 35. The two sets of blunt head sleeves 143 wrap the sharp corner 36 inside, so that the sharp corner 36 changes from a sharp point to a blunt point, which makes it convenient for the head of the liner 32 to change from a sharp point to a blunt point or vice versa in the needle holder 11. This avoids the need to use two sets of liner 32 to drive the sharp point or blunt point back and forth on the needle holder 11 when changing the sharp point or blunt point of the liner 32.

[0056] Finally, as Figures 1-7 As shown, the core support assembly 3 includes a core support 31, which is fixedly connected to the core support 32; the core support 31 facilitates the grip of external users and drives the core support 32 to move.

[0057] The liner 32 is slidably inserted into the needle seat assembly 1 and the needle tube 2. A limiting strip 33 is fixedly connected to the liner 32. After the liner 32 is inserted into the limiting cylinder 12, the limiting strip 33 on the liner 32 is slidably inserted into the protruding insertion space at the upper end of the limiting cylinder 12, so that the insertion cavity 34 on the liner 32 is aligned with the inner cylinder 1332.

[0058] Insertion cavities 34 are embedded around the outer periphery of the liner 32, and a sharp corner 36 is provided at the end of the liner 32 away from the liner seat 31. When the magnetic suction cavity 35 contacts the two sets of blunt head sleeves 143, the diameter of the two sets of blunt head sleeves 143 matches the diameter of the liner 32. A marking point is provided on the surface of the liner 32. When the marking point on the liner 32 moves to the top area of ​​the needle seat 11, the sharp corner 36 on the liner 32 is at the same height as the magnetic suction cavity 35 and the blunt head sleeves 143, which facilitates the connection between the blunt head sleeves 143 and the sharp corner 36.

[0059] The pointed angle 36 consists of three sets of inclined surfaces, each with a 120-degree inclination angle, which reduces tissue damage when the pointed angle 36 is inserted into human tissue.

[0060] The outer surface of the core 32 is entirely covered with an insulating layer, and a conductive wire is provided between the insulating layer and the outer peripheral wall of the core 32. The contact end of the conductive wire is in contact with the core 32. The conductive wire passes through the core 32 and extends outward through the core seat 31 to connect with the external monitoring instrument. When the sharp corner 36 punctures human tissue, the punctured human tissue will discharge electricity. The electrical signal is transmitted through the sharp corner 36 to the conductive wire through the core 32, and the conductive wire transmits the electrical signal to the external monitoring instrument.

[0061] The connection between the pointed corner 36 and the core 32 is recessed inward to form a magnetic cavity 35. The side wall of the magnetic cavity 35 is provided with a magnet that is magnetically attracted to the magnet on the protruding area 145.

[0062] The core 32 is hollow inside. The core 32, magnetic cavity 35 and sharp corner 36 are connected by welding. A wire is installed inside the core 32. The wire is connected to an external monitoring instrument and transmits the electrical signal to the external monitoring instrument to realize the monitoring of discharge.

[0063] The installation method, connection method, or setting method disclosed in this embodiment are all common mechanical connections.

[0064] Any connection method that can achieve its beneficial effect can be implemented, so the specific structural composition and working principle will not be described in detail in this embodiment.

[0065] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0066] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A low-damage puncture needle, characterized in that, include: Needle hub assembly (1), which is connected and fixed to the needle tube (2), The core seat assembly (3) is detachably connected to the needle seat assembly (1), which allows one end of the core seat assembly (3) to slide within the needle seat assembly (1) and the needle tube (2). The needle hub assembly (1) includes a needle hub (11); the needle hub (11) is coaxially connected and fixed to the needle tube (2); The limiting cylinder (12) is coaxially fixedly connected to the needle seat (11), and the limiting cylinder (12) is connected to one end of the needle tube (2); The first drive ring (13) and the second drive ring (14) are rotatably connected to the upper and lower ends of the side wall of the needle seat (11). The second drive ring (14) is fixedly connected to the second magnetic ring (141), and the second magnetic ring (141) is arranged around the outer peripheral wall of the embedded cavity (142); By twisting the second drive ring (14), the position of the magnet (132) provided on the second magnetic ring (141) is controlled to magnetically fix or release the blunt tip sleeve (143). The two sets of blunt tip sleeves (143) wrap the sharp corner (36) inside, so that when the needle tube (2) comes into contact with human tissue, the head of the liner (32) can be changed from a sharp tip to a blunt tip or from a sharp tip to a blunt tip in the needle seat (11). This avoids the need to use two sets of liner (32) to drive the sharp tip or blunt tip back and forth on the needle seat (11) when changing the sharp tip or blunt tip of the liner (32). The embedded cavity (142) is connected to the inner cavity of the limiting cylinder (12). The front and rear ends of the limiting cylinder (12) are provided with embedded cavities (142). The outer edges of the two sets of embedded cavities (142) are hollowed out near the surface of the second magnetic ring (141). The two sets of embedded cavities (142) are slidably provided with blunt head sleeves (143). The blunt head sleeves (143) are provided with magnetic attraction areas (144). The upper end of the blunt head sleeves (143) protrudes outward to form a protruding area (145). The surface of the protruding area (145) is provided with magnets. The first drive ring (13) is fixedly connected to the first magnetic ring (131). The first magnetic ring (131) is wrapped around the outer end of the limiting cylinder (12). Magnets (132) are embedded in the four corners of the surface of the first magnetic ring (131). An insertion component (133) is embedded in the side wall of the limiting cylinder (12) at the same height as the first magnetic ring (131). By twisting the first drive ring (13), the position of the magnet (132) provided on the first magnetic ring (131) is controlled to magnetically attract or release the inner cylinder (1332), so that multiple sets of inner cylinders (1332) can be inserted into multiple sets of insertion cavities (34), and the lining core (32) can be fixed or disassembled.

2. The low-damage puncture needle according to claim 1, characterized in that: The insertion assembly (133) includes an outer cylinder (1331), and the outer cylinder (1331) is embedded in the side wall of the limiting cylinder (12) which is at the same height as the first magnetic ring (131).

3. The low-damage puncture needle according to claim 2, characterized in that: An inner cylinder (1332) is slidably connected inside the outer cylinder (1331). The inner cylinder (1332) is fixedly connected to one end of the return spring (1333), and the other end of the return spring (1333) is fixedly connected to the side wall of the outer cylinder (1331). A magnet (132) is connected to the side wall of the inner cylinder (1332) near the return spring (1333) for magnetic attraction with the magnet (132) on the first magnetic ring (131).

4. The low-damage puncture needle according to claim 1, characterized in that: The core support assembly (3) includes a core support (31), which is fixedly connected to the core support (32); The liner (32) is slidably inserted into the needle hub assembly (1) and the needle tube (2), and a limiting strip (33) is fixedly connected to the liner (32).

5. The low-damage puncture needle according to claim 4, characterized in that: The outer periphery of the liner (32) is provided with an insertion cavity (34), and the end of the liner (32) away from the liner seat (31) is provided with a sharp corner (36).

6. The low-damage puncture needle according to claim 5, characterized in that: The sharp corner (36) consists of three sets of inclined planes, each with a 120-degree inclination angle, which reduces the damage to the tissue when the sharp corner (36) is inserted into human tissue.

7. The low-damage puncture needle according to claim 6, characterized in that: The connection between the sharp corner (36) and the core (32) is recessed inward to form a magnetic cavity (35). The side wall of the magnetic cavity (35) is provided with a magnet that is magnetically attracted to the magnet on the protruding area (145).

8. The low-damage puncture needle according to claim 4, characterized in that: An insulating layer is provided on the outer surface of the liner (32), and a conductive wire is provided between the insulating layer and the outer peripheral wall of the liner (32); The core (32) is hollow inside. The core (32), magnetic cavity (35) and sharp corner (36) are connected by welding. A wire is installed inside the core (32).

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