Novel variable angle interventional puncture trocar for treating lumbar disc herniation

Abstract

The utility model discloses a new variable angle intervention puncture trocar for treating lumbar disc herniation, which comprises an inner needle, an outer needle and an angle adjusting device, the needle tip of the inner needle is a round blunt head to reduce the frictional resistance when passing through the through hole of the outer needle needle sheath; the inner needle is made of a metal material with weak hardness, the front end of the inner needle can be shaped at an angle of 0-30 degrees according to the actual needs of surgery, so that after the outer needle reaches a certain puncture position, the inner needle can be moved to a position that cannot be reached by the outer needle according to the puncture direction to perform relevant injection operations such as injection of medicine; in addition, the inner needle can also achieve physical loosening of blunt dissection of adhesion around the nerve root; the utility model has the advantages of simple structure, reasonable design, small size, light weight, convenient transportation and storage, long service life and high suitability for non-vascular intervention operation of the spine in the treatment of lumbar disc herniation.

Description

Technical Field

[0001] This utility model relates to a novel variable-angle interventional puncture needle for treating lumbar disc herniation, belonging to the field of medical devices. Background Technology

[0002] Lumbar disc herniation is a relatively common and frequently occurring disease. It mainly occurs because the lumbar intervertebral disc and its surrounding structures, especially the nucleus pulposus, undergo varying degrees of degenerative changes. Under the influence of external forces, the annulus fibrosus of the disc ruptures, and the nucleus pulposus protrudes (or prolapses) posteriorly or into the spinal canal, causing irritation or compression of adjacent spinal nerve roots. This results in a series of clinical symptoms such as lower back pain, numbness, and pain in one or both lower limbs. During non-vascular interventional treatment of lumbar disc herniation, the presence of blood vessels and abundant nerves within the intervertebral foramen necessitates careful avoidance to minimize damage to these vessels and nerves. This significantly increases the difficulty of interventional puncture, leading to a high failure rate even among experienced operators. The inability to master the technique results in the puncture needle failing to accurately reach the target point (medial or lateral to the nerve root), ultimately leading to puncture failure.

[0003] To address the problems of the existing technology, Chinese Patent CN201675990U discloses a posterior lumbar disc puncture needle, comprising an outer needle and a matching needle core (forming an outer needle), and an inner needle and a needle core (forming an inner needle). The inner needle, with a 4-6 degree lateral deflection angle, passes through the outer needle for intradiscal puncture and treatment, resulting in minimal puncture damage and easy puncture of the herniated disc in patients with central and far lateral disc herniations. It is also simple in structure and convenient to operate. However, the puncture needle proposed in this invention achieves the angle deflection of the inner needle through a 4-6 degree lateral deflection angle at the tip of the outer needle, and this deflection angle cannot be adjusted according to actual usage, thus preventing the puncture needle from accurately reaching the target point. Utility Model Content

[0004] The purpose of this invention is to provide a novel variable-angle interventional puncture needle for treating lumbar disc herniation, in order to solve the problems mentioned in the background art.

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

[0006] A novel variable-angle interventional puncture needle for treating lumbar disc herniation includes an outer needle, an inner needle, and an angle adjustment device; wherein the outer needle includes an outer needle core, an outer needle sheath, and an outer needle plug; the angle adjustment device includes a base, a fixed base, a fixed anchor point, an operating rod, a rotating fulcrum, and an angle adjustment rod;

[0007] The outer needle sheath is set on the outer needle plug, and the outer needle plug has a through hole. The outer needle core is solid and is inserted into the outer needle sheath through the through hole on the outer needle plug.

[0008] The inner needle has a hollow structure and a blunt tip to reduce frictional resistance when it passes through the through hole inside the outer needle sheath. When the outer needle core is pulled out from the through hole on the outer needle plug, the inner needle is inserted into the outer needle sheath through the through hole to perform operations such as drug injection.

[0009] In addition, the deflection angle of the inner needle tip is adjusted by an angle adjustment device according to actual usage. The angle adjustment device includes a base, a fixed base, a fixed anchor point, an operating lever, and an angle adjustment lever. One end of the operating lever is rotatably fixed at the center of the base, denoted as the rotation fulcrum. The other end of the angle adjustment lever is also rotatably fixed at the center of the base, and the angle adjustment lever always forms a fixed angle with the operating lever with the rotation fulcrum as the vertex. The other end of the operating lever extends to the edge of the base for manual operation to control the rotation of the operating lever. The edge area of ​​the base corresponding to the rotation range of the operating lever is marked with a scale of 0°~30°. The fixed anchor point is set at the starting position of the scale. In the reset state, the operating lever is fixed at the starting position of the scale through the fixed anchor point. The fixed base is arranged adjacent to the rotation fulcrum and includes two semi-circular bases, denoted as the upper base and the lower base, respectively. The arc of the upper base is located above the diameter, and the diameter of the upper base is on the same horizontal line as the angle adjustment lever in the reset state. A gap is maintained between the diameter of the lower base and the diameter of the upper base, and the upper and lower bases are symmetrically arranged about the gap.

[0010] Furthermore, the gap between the two fixed bases allows the inner needle to pass through, thereby adjusting the angle of the front end;

[0011] Furthermore, in the reset state, the operating lever is fixed at the starting position of the scale by the fixed anchor point, and the angle adjustment lever points to the 30° scale mark;

[0012] Furthermore, the angle adjustment lever is always kept at a fixed angle of 30° with the operating lever;

[0013] Furthermore, the angle adjustment device is made of stainless steel, aluminum alloy, or a composite material of metal and polymer.

[0014] Furthermore, the inner needle is made of a soft, malleable metal, a shape memory metal, bioceramic, or a surgical steel or platinum shell, so that the deflection angle of the front end can be adjusted according to the actual use.

[0015] Furthermore, the outer needle is made of one of the high-strength metal materials such as stainless steel, titanium alloy, or cobalt-chromium alloy to ensure that the outer needle can reach the target position smoothly during puncture.

[0016] Furthermore, the deflection angle range of the inner needle tip is 0°~30°;

[0017] Furthermore, a direction indicator is set at the tail end of the inner needle, and the direction of the indicator is consistent with the deflection direction of the front end of the inner needle, so as to ensure that the inner needle accurately reaches the target position.

[0018] Furthermore, the internal needle can be used to perform blunt dissection and physical release of adhesions around the nerve root to relieve symptoms;

[0019] Furthermore, the outer diameter of the inner needle is smaller than the inner diameter of the outer needle core, the length of the outer needle is 100mm, and the length of the inner needle is 130mm.

[0020] Furthermore, the inner diameter of the outer needle core is 0.9mm, 1mm, 1.1mm or 1.2mm, and the outer diameter of the inner needle is 0.7mm, 0.8mm, 0.9mm or 1mm.

[0021] Advantages of this utility model:

[0022] Compared with existing technologies, the advantages of this invention are: the product has a simple structure, reasonable design, small size, light weight, and is easy to transport and store; the product has a long service life and is very suitable for non-vascular interventional procedures for lumbar disc herniation; the inner needle is made of a soft, malleable metal material, and the angle adjustment device can adjust the deflection angle of the inner needle tip within the range of 0° to 30° according to actual use. On the one hand, it can perform blunt dissection and physical release of adhesions around the nerve root to relieve symptoms; on the other hand, it can also perform operations such as drug injection through the through hole of the inner needle, thereby achieving precise medication; during the operation, the deflection direction of the inner needle tip can be adjusted in real time according to the direction mark at the tail end of the inner needle, so as to achieve precise control of the puncture direction and accurate capture of the target. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of a novel variable-angle interventional puncture needle for treating lumbar disc herniation proposed in this utility model;

[0024] Figure 2 This is a schematic diagram of a novel variable-angle interventional puncture needle angle adjustment device for treating lumbar disc herniation proposed in this utility model.

[0025] The components are: 1. Outer needle core; 2. Outer needle sheath; 3. Outer needle plug; 4. Inner needle; 5. Base; 6. Fixed base; 7. Fixed anchor point; 8. Operating lever; 10. Angle adjustment lever. Detailed Implementation

[0026] The technical solution of this utility model will be further described in detail below with reference to specific embodiments.

[0027] Example 1

[0028] This embodiment provides a novel variable-angle interventional puncture needle for treating lumbar disc herniation, including an outer needle, an inner needle 4, and an angle adjustment device; wherein the outer needle and the inner needle 4 are as follows: Figure 1 As shown, the outer needle sheath 2 is mounted on the outer needle plug 3, and the outer needle plug 3 has a through hole. The outer needle core 1 is solid and is inserted into the outer needle sheath 2 through the through hole on the outer needle plug 3. When the outer needle core 1 is pulled out from the through hole, the inner needle 4 is inserted into the outer needle sheath 2 through the through hole.

[0029] The inner needle 4 is made of a soft, malleable metal material, and the deflection angle of the front end of the inner needle 4 can be adjusted according to actual usage needs via an angle adjustment device. For example... Figure 2 As shown, the angle adjustment device includes a base 5, a fixed base 6, a fixed anchor point 7, an operating rod 8, and an angle adjustment rod 10. The base 5 can be circular, and one end of the operating rod 8 is rotatably fixed at the center of the circle, which is denoted as the rotation fulcrum 9. One end of the angle adjustment rod 10 is also rotatably fixed at the center of the circle, and the angle adjustment rod 10 always forms a fixed angle with the operating rod 8. The other end of the operating lever 8 extends to the edge of the base 5 for manual operation to control the rotation of the operating lever 8; the rotation range of the operating lever 8 is marked with a scale of 0° to 30° on the edge area of ​​the base 5, and the fixed anchor point 7 is set at the starting position of the scale; in the reset state, the operating lever 8 is fixed at the starting position of the scale by the fixed anchor point 7; the fixed base 6 is arranged adjacent to the rotation fulcrum 9, including two semi-circular bases, referred to as the upper base and the lower base respectively, wherein the arc of the upper base is located above the diameter, the diameter of the upper base is on the same horizontal line as the angle adjustment lever 10 in the reset state, and a gap is maintained between the diameter of the lower base and the diameter of the upper base, and the upper and lower bases are symmetrically arranged about the gap, and the gap allows the front end of the inner needle 4 to pass through.

[0030] Furthermore, the inner needle 4 has a hollow structure and a blunt tip to reduce frictional resistance when passing through the through-hole inside the outer needle sheath. After the outer needle core 1 is pulled out from the through-hole on the outer needle plug 3, the inner needle 4 is inserted into the outer needle sheath 2 through this through-hole. Because the inner needle 4 is made of a soft, malleable metal, its tip does not deflect inside the outer needle sheath 2. When the tip of the inner needle 4 exits the through-hole, it returns to the pre-adjusted deflection angle to accurately reach the target position, enabling drug injection and other operations. A direction indicator is also provided at the tail end of the inner needle 4, with the direction of the indicator consistent with the deflection direction of the tip of the inner needle 4. The outer needle is made of titanium alloy to ensure that it can smoothly reach the target position during puncture.

[0031] The inner needle 4 is longer than the outer needle, with the outer needle being 100mm long and the inner needle 4 being 130mm long; the inner diameter of the outer needle is larger than the outer diameter of the inner needle 4, with the outer needle having an inner diameter of 0.9mm, 1mm, 1.1mm or 1.2mm; the corresponding outer diameter of the inner needle 4 is 0.7mm, 0.8mm, 0.9mm or 1mm.

[0032] The angle adjustment device can adjust the deflection angle of the front end of the inner needle 4. When it is necessary to adjust the deflection angle of the front end of the inner needle 4, the front end of the inner needle 4 is passed through the gap of the fixed base 6, the control lever 8 is rotated along the direction of the scale through the rotation fulcrum 9, and the angle adjustment lever 10 is rotated downward with the rotation fulcrum 9 as the center. The front end of the inner needle 4 can be adjusted in the range of 0° to 30° according to the actual use.

[0033] The working principle of this utility model:

[0034] The working principle of this utility model is as follows: According to the actual surgical needs, the surgeon adjusts the deflection angle of the front end of the inner 4 needles; the front end of the inner 4 needles is passed through the gap in the fixed base 6, ensuring that the direction of the marking at the tail end of the inner 4 needles is consistent with the direction of the deflection angle at the front end; the operating rod 8 is moved along the scale direction, and the angle adjustment rod 10, under the force of the operating rod 8, rotates downwards around the rotation fulcrum 9; the deflection angle of the front end of the inner 4 needles is adjusted within the range of 0° to 30° according to the actual surgical needs; the outer needle core 1 is inserted into the outer needle sheath 2 through the through hole on the outer needle plug 3, for non-vascular interventional procedures of the spine in lumbar disc herniation. During the procedure, the outer needle is inserted as a whole. When it reaches the outer edge of the facet joint (outer side of the intervertebral foramen), the insertion is stopped, the outer needle core 1 is removed, and the inner needle 4, which has been angled, is inserted through the through hole of the outer needle plug 3. The direction of the deflection of the front end of the inner needle 4 is adjusted according to the direction mark at the tail end, and the inner needle is pushed to enter the spinal canal through the intervertebral foramen while closely following the edge of the facet joint. Since the inner needle 4 is made of a soft and malleable metal material, there is no angle deflection phenomenon inside the outer needle sheath 2. When the front end of the inner needle 4 extends out of the outer needle sheath 2, it deflects, thereby accurately reaching the target (inner or outer side of the nerve root). Drug injection and other operations are performed through the through hole of the inner needle 4.

[0035] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the claims.

Claims

1. A novel variable-angle interventional puncture needle for treating lumbar disc herniation, characterized in that, The puncture needle includes an outer needle, an inner needle (4), and an angle adjustment device; The outer needle includes an outer needle core (1), an outer needle sheath (2), and an outer needle plug (3). The angle adjustment device includes a base (5), a fixed base (6), a fixed anchor point (7), an operating rod (8), and an angle adjustment rod (10).

2. The puncture needle according to claim 1, characterized in that, In the angle adjustment device: one end of the operating rod (8) is rotatably fixed at the center of the base (5), which is called the rotation fulcrum (9); one end of the angle adjustment rod (10) is also rotatably fixed at the center of the base (5) through the rotation fulcrum (9), and the angle adjustment rod (10) always forms a fixed angle with the operating rod (8); the other end of the operating rod (8) extends to the edge of the base (5), and the rotation range of the operating rod (8) is marked with a scale of 0°~30° on the edge area of ​​the base (5); the fixed anchor point (7) is set at the starting position of the scale, and in the reset state, the operating rod (8) is fixed at the starting position of the scale through the fixed anchor point (7); the fixed base (6) is arranged adjacent to the rotation fulcrum (9), including two semi-circular bases, which are called the upper base and the lower base respectively, wherein the arc of the upper base is located above the diameter, the diameter of the upper base is on the same horizontal line as the angle adjustment rod (10) in the reset state, a gap is provided between the lower base and the upper base, and the upper and lower bases are symmetrically arranged about the gap.

3. The puncture needle according to claim 2, characterized in that, The inner needle (4) is made of malleable metal or shape memory metal to adjust the deflection angle of the front end of the inner needle (4); the deflection angle of the front end of the inner needle (4) is in the range of 0°~30°.

4. The puncture needle according to claim 3, characterized in that, The outer needle includes an outer needle core (1), an outer needle sheath (2), and an outer needle plug (3); the tail end of the outer needle sheath (2) is fixed to the outer needle plug (3), and a through hole is provided on the outer needle plug (3), through which the outer needle core (1) is inserted into the outer needle sheath (2).

5. The puncture needle according to claim 4, characterized in that, The inner needle (4) is provided with a direction mark at the tail end to control the deflection direction of the front end of the inner needle (4).

6. The puncture needle according to claim 5, characterized in that, The inner diameter of the outer needle core is 0.9mm, 1mm, 1.1mm or 1.2mm, and the corresponding outer diameter of the inner needle (4) is 0.7mm, 0.8mm, 0.9mm or 1mm.

7. The puncture needle according to claim 6, characterized in that, The outer needle is 100mm long and the inner needle (4) is 130mm long.

8. The puncture needle according to claim 7, characterized in that, The outer needle is made of one of the following high-strength metal materials: stainless steel, titanium alloy, or cobalt-chromium alloy, to ensure that the outer needle punctures and reaches the target location.

9. The puncture needle according to claim 8, characterized in that, The tip of the inner needle (4) is blunt to reduce frictional resistance in the through hole of the outer needle sheath (2).

10. A novel variable-angle interventional puncture needle, characterized in that, The puncture needle is based on the puncture needle described in any one of claims 1-9, and the puncture needle is used in non-vascular interventional procedures of the spine in the treatment of lumbar disc herniation.

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