Anti-migration intervertebral disc puncture needle

Abstract

The application discloses a shift-preventing intervertebral disc puncture needle, which comprises a hand-held part, an outer needle cylinder installed at the upper end of the hand-held part, an inner needle core nestedly installed in the inner part of the outer needle cylinder, and a mounting head fixedly installed at the bottom end of the inner needle core. Equidistant positioning rings are arranged on the outer surface of the outer needle cylinder, and the spacing between the positioning rings is 5 mm. A connecting sleeve coaxially arranged with the hand-held part is installed in the inner part of the hand-held part, and the connecting sleeve is fixedly connected with the outer needle cylinder. The reciprocating rotation of the connecting sleeve and the outer needle cylinder realizes the rotation of the needle. The shift-preventing intervertebral disc puncture needle is pressed, and the movable button drives the driving rack on the inner side to move. The meshing connection between the driving rack and the driven gear enables the movable button to drive the connecting sleeve to rotate through the driven gear when the movable button moves, and the connecting sleeve drives the outer needle cylinder to rotate, so that the needle is rotated, and the damage to the tissues in the body of a patient is reduced.

Description

Technical Field

[0001] This invention relates to the field of pain management technology, specifically to an anti-displacement intervertebral disc puncture needle. Background Technology

[0002] A disc puncture is a medical procedure in which a doctor uses a thin needle to puncture the intervertebral disc. For patients whose disc herniation causes nerve compression and secondary pain, a disc puncture and ablation surgery is performed. First, the needle is used to puncture the herniated area of ​​the disc, and then a plasma electrode is used to ablate the herniated tissue, reducing the pressure inside the disc, reducing the size of the herniation, decreasing the compression on the nerve, and relieving the patient's pain.

[0003] As in the prior art, Chinese patent application number CN202122759701.1 discloses an intervertebral disc puncture needle, including an outer needle assembly and an inner needle assembly. The outer needle assembly includes a control valve and an outer needle tube connected to the outlet of the control valve. The inner needle assembly includes an inner needle tube and a needle cap connected to the inner needle tube. The outer diameter of the inner needle tube is smaller than the inner diameter of the outer needle tube. The inner needle tube is inserted into the outer needle tube and is threadedly connected to the inlet of the control valve through the needle cap. A limiting clip is provided on the outer wall of the end of the outer needle tube away from the control valve to prevent the outer needle tube from falling off the puncture site.

[0004] For example, in the prior art, Chinese patent application number CN201911205515.4 discloses a disc puncture needle, including a needle tube assembly, an expansion liner assembly, a blunt-tipped liner assembly, and a puncture liner assembly. The needle tube assembly includes a needle tube and a first female connector fixedly connected to the rear end of the needle tube. The first female connector has a through hole communicating with the needle tube hole. The surgical puncture process is improved from the conventional one needle tube and liner to four steps to complete the surgical puncture process.

[0005] For example, in the prior art, Chinese patent application number CN201020192496.4 discloses a puncture needle for treating lumbar disc herniation, including a straight needle tube and a curved needle tube. Both the straight and curved needle tubes have needle hubs at their tail ends. The straight needle tube has a curved needle tip with an opening on one side. The curved needle tube has a curved needle tip section, which is fitted inside the straight needle tube, with the curved portion of the curved needle tip section extending from the opening at the needle tip of the straight needle tube. Using the puncture needle for treating lumbar disc herniation described in this invention, the outer straight needle tube, through the safest and easiest-to-operate posterolateral approach puncture method, only requires one puncture to reach the edge of the herniated disc annulus fibrosus. Then, the inner curved needle tube allows for injection into the intervertebral disc through multiple channels and in multiple directions.

[0006] Based on the above information, it can be seen that when the existing puncture needle is inserted into the body tissue, the oblique structure of the needle tip will cut and tear the tissue, causing additional harm to the patient. Summary of the Invention

[0007] The purpose of this invention is to provide a disc puncture needle that prevents displacement, in order to solve the problem mentioned in the background art that direct needle insertion increases harm to patients.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a transverse disc puncture needle with anti-displacement function, comprising a handheld component and an outer syringe barrel mounted on the upper end of the handheld component. An inner needle core is nested inside the outer syringe barrel, and an installation head is fixedly mounted on the bottom end of the inner needle core. Positioning rings are evenly spaced on the outer surface of the outer syringe barrel, with a spacing of 5mm between the positioning rings. The positioning rings on the outside of the outer syringe barrel increase the friction between it and the internal tissue, reducing overall movement after puncture. A connecting sleeve is installed inside the handheld component and is concentrically arranged therewith. The connecting sleeve is fixedly connected to the outer syringe barrel. The connecting sleeve drives the outer syringe barrel to reciprocate to achieve rotary needle insertion. A reciprocating mechanism for driving the connecting sleeve to rotate is provided inside the handheld component. A connecting platform is mounted on the lower end of the connecting sleeve. A locking mechanism is provided between the connecting platform and the inside of the handheld component. After the inner needle core is pulled out, the locking mechanism locks the connecting platform to restrict the rotation of the connecting sleeve.

[0009] Preferably, the reciprocating mechanism includes a movable button that is slidably installed inside the handheld component, and an anti-slip pad with strip-shaped protrusions is fixedly installed on the outer side of the movable button.

[0010] Preferably, there are two symmetrically arranged active buttons on the left and right sides, and a first spring is fixedly installed between the two active buttons. The elastic action of the first spring squeezes the two active buttons to reset, and pushes the two active buttons to the outside to reset under the elastic action of the first spring. At this time, the meshing between the active rack and the driven gear drives the connecting sleeve to rotate in the opposite direction.

[0011] Preferably, an active rack is fixedly installed on the inner surface of the active button, and the active rack is meshed with a driven gear fixedly installed on the outer surface of the connecting sleeve. The active button drives the active rack inside to move, and the meshing connection between the active rack and the driven gear enables the connecting sleeve to rotate through the driven gear when the active button moves.

[0012] Preferably, a limiting boss is fixedly installed on the outer surface of the upper end of the connecting sleeve, and the limiting boss slides in cooperation with a limiting groove opened on the inner wall of the handheld component. The outer surface of the limiting boss is rotatably installed with equally spaced balls. The upper and lower movement of the connecting sleeve is restricted by the cooperation between the limiting boss and the limiting groove. During the rotation of the connecting sleeve, the limiting boss fixedly installed on the upper outer end rotates accordingly inside the limiting groove. At the same time, the balls reduce the friction between the two, and the upper and lower movement of the connecting sleeve is restricted by the cooperation between the limiting boss and the limiting groove.

[0013] Preferably, the locking mechanism includes a locking block fixedly installed on the inner wall of the lower end of the handheld component and locking grooves opened on the upper ends of the left and right sides of the connecting platform. The positions of the locking block and the locking grooves correspond to each other vertically, and the locking action between the locking block and the locking grooves restricts the rotation of the connecting platform.

[0014] Preferably, the outer surface of the connecting platform is provided with an annular groove, which is connected to the engaging groove. The engaging block enters the annular groove from the engaging groove to release the engagement.

[0015] Preferably, a docking block is fixedly installed on the outer surface of the lower end of the connecting sleeve, and the docking block and the docking groove opened inside the connecting platform form an up-and-down sliding structure.

[0016] Preferably, a second spring is fixedly installed between the docking block and the inner wall of the docking groove, and the mounting head uses a threaded structure to press the connecting platform upward when installed with the handheld component.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: the anti-displacement intervertebral disc puncture needle adopts a novel structural design, the specific details of which are as follows: 1. When the doctor performs needle insertion, he presses the active button. At this time, the active button moves the active rack inside. The meshing connection between the active rack and the driven gear makes the active button move so that the connected sleeve rotates through the driven gear. The connected sleeve then rotates the outer needle barrel, realizing the rotational needle insertion and reducing tearing damage to the patient's internal tissues. Furthermore, after releasing the active button, the two active buttons on the left and right are pushed outward to reset under the elastic action of the first spring. At this time, the meshing between the active rack and the driven gear drives the connecting sleeve to rotate in the opposite direction, ultimately realizing the reciprocating rotation of the outer syringe for needle insertion. Furthermore, during the rotation of the connecting sleeve, the limiting boss fixedly installed on the upper external part rotates accordingly inside the limiting groove. At the same time, the ball bearings reduce the friction between the two, and the cooperation between the limiting boss and the limiting groove restricts the vertical movement of the connecting sleeve.

[0018] 2. After the inner needle core is pulled out by the installation head, the connecting platform is pulled downward under the elastic action of the second spring. At this time, the locking groove on the outer surface of the connecting platform moves to the position corresponding to the locking block. The locking action between the locking block and the locking groove restricts the rotation of the connecting platform. In addition, there is a flat section at the connection between the connecting platform and the connecting sleeve. Therefore, the connecting platform restricts the rotation of the connecting sleeve, so that the connecting sleeve cannot drive the outer needle to rotate after the puncture is completed. Furthermore, when the mounting head is installed with the handheld component in a threaded fit, the mounting head presses against the connecting platform. At this time, the connecting platform moves upward relative to the connecting sleeve. The locking groove and the locking block disengage, and finally the locking block enters the annular interior and no longer forms a locking structure. At this time, the connecting platform and the connecting sleeve can rotate normally. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the outer syringe and inner needle core structure of the present invention; Figure 3 For the present invention Figure 2 Enlarged structural diagram at point A in the middle; Figure 4 This is a schematic diagram of the internal structure of the handheld component of the present invention; Figure 5 For the present invention Figure 4 Enlarged structural diagram at point B; Figure 6 This is a schematic diagram of the driven gear structure of the present invention; Figure 7 For the present invention Figure 6 Enlarged structural diagram at point C; Figure 8 This is a schematic diagram showing the positional relationship between the mounting head and the connecting platform of the present invention; Figure 9 This is a schematic diagram of the connecting platform structure of the present invention; Figure 10 This is a schematic diagram of the connecting platform in the downward reset state of the present invention; Figure 11 This is a schematic diagram of the internal structure of the connecting platform of the present invention.

[0020] In the diagram: 1. Handheld component; 2. Outer syringe; 201. Connecting sleeve; 3. Inner needle core; 4. Mounting head; 5. Positioning ring; 6. Movable button; 7. Anti-slip pad; 8. First spring; 9. Driving rack; 10. Driven gear; 11. Limiting boss; 12. Limiting groove; 13. Ball bearing; 14. Connecting platform; 15. Annular groove; 16. Engaging groove; 17. Engaging block; 18. Connecting block; 19. Connecting groove; 20. Second spring. Detailed Implementation

[0021] 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.

[0022] Example 1: Please refer to Figures 1-7 To achieve reciprocating rotational needle insertion, this embodiment provides the following technical solution, specifically disclosing: a handheld component 1 and an outer syringe 2 mounted on the upper end of the handheld component 1. An inner needle core 3 is nested inside the outer syringe 2, and an mounting head 4 is fixedly mounted at the bottom end of the inner needle core 3. Positioning rings 5 ​​are evenly spaced on the outer surface of the outer syringe 2, with a spacing of 5mm between the positioning rings 5. A connecting sleeve 201, concentrically mounted with the outer syringe 2, is installed inside the handheld component 1. The connecting sleeve 201 is fixedly connected to the outer syringe 2, and the connecting sleeve 201 drives the outer syringe 2 to reciprocate, achieving rotational needle insertion. Furthermore, a reciprocating mechanism is provided inside the handheld component 1 to drive the connecting sleeve 201 to rotate. The reciprocating mechanism includes a movable button 6 slidably mounted inside the handheld component 1. A non-slip pad 7 with a strip-shaped protrusion is fixedly installed on the side exterior. Two movable buttons 6 are symmetrically arranged on the left and right sides. A first spring 8 is fixedly installed between the two movable buttons 6. The elasticity of the first spring 8 will squeeze the two movable buttons 6 to reset. An active rack 9 is fixedly installed on the inner surface of the movable button 6. The active rack 9 is meshed with the driven gear 10 fixedly installed on the outer surface of the connecting sleeve 201. A limiting boss 11 is fixedly installed on the upper outer surface of the connecting sleeve 201. The limiting boss 11 slides in cooperation with the limiting groove 12 opened in the inner wall of the handheld part 1. Rollers 13 with equal spacing are rotatably installed on the outer surface of the limiting boss 11. The upper and lower movement of the connecting sleeve 201 is restricted by the cooperation between the limiting boss 11 and the limiting groove 12.

[0023] When performing disc puncture on a patient, the doctor first selects a puncture needle of appropriate size, holds the handheld component 1, and performs the puncture operation with the aid of imaging technology. The outer needle cylinder 2 is inserted into the designated location in the patient's body. At this time, the positioning ring 5 on the outside of the outer needle cylinder 2 increases the friction between it and the internal tissue, reducing overall movement after puncture. During the puncture, the doctor intermittently presses the movable buttons 6 on both sides of the handheld component 1. When the movable buttons 6 are squeezed, they move inward. At this time, the driving rack 9 and the driven gear 10 move relative to each other. The meshing connection between the two causes the driven gear 10 to drive the connecting sleeve 201 to rotate. The connecting sleeve 201 drives the outer needle cylinder 2 to rotate. Releasing the movable buttons... When button 6 is pressed, the elastic push of the first spring 8 causes the movable buttons 6 on both sides to move outward. At this time, the driven gear 10 drives the connecting sleeve 201 to rotate in the opposite direction, and the outer needle 2 rotates in the opposite direction synchronously. In this way, the outer needle 2 reciprocates during puncture to reduce tearing of the patient's internal tissues. When the connecting sleeve 201 rotates, the limiting boss 11 on its upper outer side slides in the limiting groove 12 opened inside the handheld part 1. At the same time, the ball bearing 13 on the outer side of the limiting boss 11 changes the sliding friction into rolling friction, reducing the friction force during rotation. The movement of the connecting sleeve 201 is restricted by the cooperation between the limiting boss 11 and the limiting groove 12, maintaining the stability of the device during puncture.

[0024] Example 2: Please refer to Figures 8-11 To achieve the purpose of restricting rotation, this embodiment provides the following technical solution, specifically: A connecting platform 14 is installed on the lower outer side of the connecting sleeve 201. A locking mechanism is provided between the connecting platform 14 and the inside of the handheld component 1. After the inner needle core 3 is pulled out, the locking mechanism locks the connecting platform 14 to restrict the rotation of the connecting sleeve 201. The locking mechanism includes a locking block 17 fixedly installed on the inner wall of the lower end of the handheld component 1 and locking grooves 16 opened on the upper ends of the left and right sides of the connecting platform 14. The positions of the locking block 17 and the locking grooves 16 correspond vertically to each other. The outer surface of the connecting platform 14 is provided with an annular groove 15, which is connected to the engaging groove 16. The engaging block 17 enters the annular groove 15 from the engaging groove 16 to release the engagement. The lower outer surface of the connecting sleeve 201 is fixedly installed with a docking block 18. The docking block 18 and the docking groove 19 opened inside the connecting platform 14 form an up-and-down sliding structure. A second spring 20 is fixedly installed between the docking block 18 and the inner wall of the docking groove 19. When the mounting head 4 is installed with the handheld part 1 using the threaded structure, it presses the connecting platform 14 upward.

[0025] After the puncture is completed, the mounting head 4 is screwed off, and the inner needle core 3 is pulled out by utilizing the threaded engagement between the mounting head 4 and the handheld component 1. At this time, the mounting head 4 is released from the pressure on the connecting platform 14. Under the elastic pull of the second spring 20, the connecting platform 14 is pulled downward relative to the connecting sleeve 201. At the same time, the mating block 18 slides in the mating groove 19. After the connecting platform 14 moves downward, the locking block 17 inside the handheld component 1 enters the locking groove 16 on the left and right sides of the connecting platform 14 accordingly. The locking action between the locking block 17 and the locking groove 16 is utilized. The connecting platform 14 is restricted from rotating (during puncture, the mounting head 4 is threadedly installed between the mounting head 4 and the handheld component 1, at which time the upper end of the mounting head 4 presses against the connecting platform 14, pressing the connecting platform 14 upward. At this time, the locking block 17 fixedly installed inside the handheld component 1 slides into the annular groove 15. The annular groove 15 has no locking effect on the locking block 17, so the connecting platform 14 can rotate normally). Thus, the connecting platform 14 is used to restrict the rotation of the connecting sleeve 201, and finally restrict the rotation of the outer syringe 2, so that the outer syringe 2 cannot rotate after puncture, ensuring that subsequent operations can proceed normally.

[0026] In the description of this invention, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] 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 transverse disc puncture needle for preventing displacement, comprising a handheld component (1) and an outer needle barrel (2) mounted on the upper end of the handheld component (1), wherein an inner needle core (3) is nested inside the outer needle barrel (2), and an mounting head (4) is fixedly mounted on the bottom end of the inner needle core (3), characterized in that, Also includes: The outer surface of the outer syringe (2) is provided with positioning rings (5) at equal intervals, and the spacing between the positioning rings (5) is 5mm; The handheld component (1) is equipped with a connecting sleeve (201) that is concentrically arranged with it. The connecting sleeve (201) is fixedly connected to the outer syringe (2). The connecting sleeve (201) drives the outer syringe (2) to reciprocate to achieve rotational needle insertion. The handheld component (1) is equipped with a reciprocating mechanism for driving the connecting sleeve (201) to rotate. A connecting platform (14) is installed on the lower exterior of the connecting sleeve (201). The connecting platform (14) and the handheld component (1) are provided with a locking mechanism. After the inner needle core (3) is pulled out, the locking mechanism locks the connecting platform (14) to restrict the rotation of the connecting sleeve (201).

2. The intervertebral disc puncture needle for preventing displacement according to claim 1, characterized in that: The reciprocating mechanism includes an active button (6) that is slidably installed inside the handheld component (1), and an anti-slip pad (7) with strip-shaped protrusions is fixedly installed on the outside of the active button (6).

3. The intervertebral disc puncture needle for preventing displacement according to claim 2, characterized in that: Two active buttons (6) are symmetrically arranged on the left and right sides. A first spring (8) is fixedly installed between the two active buttons (6). The elastic action of the first spring (8) will squeeze the two active buttons (6) to reset.

4. The intervertebral disc puncture needle for preventing displacement according to claim 3, characterized in that: The active button (6) has an active rack (9) fixedly installed on its inner surface, and the active rack (9) meshes with the driven gear (10) fixedly installed on the outer surface of the connecting sleeve (201).

5. The intervertebral disc puncture needle for preventing displacement according to claim 4, characterized in that: The upper outer surface of the connecting sleeve (201) is fixedly installed with a limiting boss (11), and the limiting boss (11) slides in cooperation with the limiting groove (12) opened on the inner wall of the handheld component (1).

6. The intervertebral disc puncture needle for preventing displacement according to claim 5, characterized in that: The outer surface of the limiting boss (11) is rotatably equipped with equally spaced ball bearings (13), which restrict the up and down movement of the connecting sleeve (201) by the cooperation between the limiting boss (11) and the limiting groove (12).

7. The intervertebral disc puncture needle for preventing displacement according to claim 1, characterized in that: The locking mechanism includes a locking block (17) fixedly installed on the inner wall of the lower end of the handheld component (1) and locking grooves (16) opened on the upper ends of the left and right sides of the connecting platform (14). The positions of the locking block (17) and the locking grooves (16) correspond to each other vertically.

8. The intervertebral disc puncture needle for preventing displacement according to claim 7, characterized in that: The outer surface of the connecting platform (14) is provided with an annular groove (15), which is connected to the locking groove (16). The locking block (17) enters the annular groove (15) from the locking groove (16) to release the locking.

9. The intervertebral disc puncture needle for preventing displacement according to claim 8, characterized in that: A docking block (18) is fixedly installed on the lower outer surface of the connecting sleeve (201). The docking block (18) and the docking groove (19) opened inside the connecting platform (14) form an up-and-down sliding structure.

10. The intervertebral disc puncture needle for preventing displacement according to claim 9, characterized in that: A second spring (20) is fixedly installed between the inner wall of the docking block (18) and the docking groove (19). When the mounting head (4) is installed with the hand-held part (1) using the threaded structure, it presses the connecting table (14) upward.

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