Intervertebral disc puncture trocar

Abstract

The utility model discloses an intervertebral disc puncture trocar which comprises a thick needle tube, the top end of the thick needle tube is fixedly connected with a thick needle cap, an installation ring body is movably arranged in the thick needle cap, the inner wall of the installation ring body is connected with a guide assembly, and a thin needle tube is arranged on the guide assembly. In the utility model, the thick needle tube with a larger aperture and high hardness is used for puncturing from the skin to the outside of the annulus fibrosus, the thin needle tube with a smaller aperture and low hardness is used for puncturing from the annulus fibrosus to the nucleus pulposus, the two puncture needles are matched for use, the puncture needle with the small aperture is 3cm longer than the puncture needle with the large aperture, and scales are arranged at the head end of the puncture needle. And the small-aperture thin needle tube can pass through the large-aperture thick needle tube, so that the puncture difficulty is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical supplies technical field especially relates to intervertebral disc puncture trocar needle. BACKGROUND

[0002] Intervertebral disc puncture injection technology is often used for diagnosing and treating lumbar degenerative diseases. It includes the diagnosis of discogenic low back pain, the judgment of multi-segmental intervertebral disc herniation responsible segment, etc. At present, there is still a lack of special puncture needle. Using puncture needle with larger aperture will cause greater damage to the intervertebral disc annulus fibrosus and accelerate the risk of intervertebral disc degeneration. If a puncture needle with smaller aperture is used, the puncture difficulty will be significantly increased due to the too great flexibility of the small-aperture puncture needle, which is not convenient for adjusting the puncture direction during operation. SUMMARY

[0003] The utility model discloses a intervertebral disc puncture trocar needle which solves the problems in the prior art.

[0004] In order to achieve the above-mentioned purpose, the utility model discloses a intervertebral disc puncture trocar needle, which comprises a thick needle needle tube, a thick needle needle cap is fixedly connected to the top end of the thick needle needle tube, an installation ring body is movably arranged in the thick needle needle cap, a guide assembly is connected to the inner wall of the installation ring body, and a thin needle needle tube is arranged on the guide assembly.

[0005] Further description of the above technical solution:

[0006] Two limiting blocks are fixedly connected to the outer surface of the installation ring body, two vertically arranged entering grooves and two horizontally arranged limiting grooves are formed in the inner wall of the thick needle needle cap, the entering grooves are communicated with the corresponding limiting grooves, the limiting blocks are located in the corresponding limiting grooves, and a magnetic attraction assembly is arranged between the limiting blocks and the limiting grooves.

[0007] Further description of the above technical solution:

[0008] The magnetic attraction assembly comprises a first adsorption magnet and a second adsorption magnet, the first adsorption magnet is fixedly connected to the inside of the limiting groove, the second adsorption magnet is fixedly connected to the side wall of the limiting block, and the first adsorption magnet and the second adsorption magnet are magnetically connected.

[0009] Further description of the above technical solution:

[0010] The guide assembly comprises two connecting blocks fixedly connected to the inner wall of the installation ring body, the two connecting blocks are symmetrically arranged, and a limiting guide ring is fixedly connected to the opposite ends of the two connecting blocks. The thin needle needle tube penetrates through the limiting guide ring.

[0011] Further description of the above technical solution:

[0012] The top end of the thin needle needle tube is fixedly connected with a thin needle needle cap, and the outer surface of the thin needle needle tube is provided with a scale line.

[0013] As a further description of the above technical solution:

[0014] The diameter of the thin needle needle tube is smaller than that of the thick needle needle tube.

[0015] The utility model has the advantages that:

[0016] 1. Compared with the prior art, the intervertebral disc puncture trocar needle has a thick needle needle tube with a slightly larger aperture and high hardness for puncturing from the skin to the outside of the annulus fibrosus, and a thin needle needle tube with a smaller aperture and low hardness for puncturing from the annulus fibrosus to the nucleus pulposus, the two puncture needles are used in cooperation, the small-aperture puncture needle is 3 cm longer than the large-aperture puncture needle, the puncture needle head is provided with a scale, and the small-aperture thin needle needle tube can pass through the large-aperture thick needle needle tube, so that the puncture difficulty is reduced.

[0017] 2. Compared with the prior art, the intervertebral disc puncture trocar needle takes the installation ring body, embeds the two limiting blocks on the installation ring body into the interiors of the two entering grooves, then rotates the installation ring body, so that the limiting blocks are embedded into the interiors of the limiting grooves, the first adsorption magnet and the second adsorption magnet are magnetically connected, at this time, the installation ring body is not easy to loosen, the stability of the installation ring body is ensured, then the thin needle needle tube is inserted through the limiting guide ring, so that the thin needle needle tube is more stable during puncture. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 The utility model provides an overall structure perspective drawing of the intervertebral disc puncture trocar needle.

[0019] Fig. 2 The utility model provides a thick needle needle cap schematic view of the intervertebral disc puncture trocar needle.

[0020] Fig. 3 The utility model provides an installation ring body schematic view of the intervertebral disc puncture trocar needle.

[0021] LEGEND:

[0022] 1. thick needle needle tube;2, thick needle needle cap;3, entering groove;4, limiting groove;5, first adsorption magnet;6, installation ring body;7, limiting block;8, second adsorption magnet;9, connecting block;10, limiting guide ring;11, thin needle needle tube;12, thin needle needle cap. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0024] With reference to Figs. 1 to 3 The intervertebral disc puncture trocar provided by the utility model comprises a thick needle needle tube 1, a thick needle needle cap 2 is fixedly connected to the top end of the thick needle needle tube 1, an installation ring body 6 is movably arranged in the thick needle needle cap 2, two limiting blocks 7 are fixedly connected to the outer surface of the installation ring body 6, two vertically arranged entering grooves 3 and two horizontally arranged limiting grooves 4 are formed in the inner wall of the thick needle needle cap 2, the entering grooves 3 are communicated with the corresponding limiting grooves 4, and the limiting blocks 7 are located in the corresponding limiting grooves 4.

[0025] With reference to Fig. 2 And Fig. 3 In order to prevent the installation ring body 6 from loosening, a magnetic attraction assembly is arranged between the limiting block 7 and the limiting groove 4, the magnetic attraction assembly comprises a first adsorption magnet 5 and a second adsorption magnet 8, the first adsorption magnet 5 is fixedly connected to the inside of the limiting groove 4, the second adsorption magnet 8 is fixedly connected to the side wall of the limiting block 7, and the first adsorption magnet 5 and the second adsorption magnet 8 are magnetically connected.

[0026] With reference to Fig. 1 And Fig. 3 In order to guide the thin needle needle tube 11, a guide assembly is connected to the inner wall of the installation ring body 6, the guide assembly is provided with the thin needle needle tube 11, the guide assembly comprises two connecting blocks 9 fixedly connected to the inner wall of the installation ring body 6, the two connecting blocks 9 are symmetrically arranged, the opposite ends of the two connecting blocks 9 are fixedly connected to a limiting guide ring 10, the thin needle needle tube 11 penetrates through the limiting guide ring 10, a thin needle needle cap 12 is fixedly connected to the top end of the thin needle needle tube 11, a scale line is arranged on the outer surface of the thin needle needle tube 11, the scale line can control the depth of entering the annulus fibrosus, and the diameter of the thin needle needle tube 11 is smaller than the diameter of the thick needle needle tube 1.

[0027] Working principle:

[0028] When in use, a thick needle needle tube 1 with a slightly larger aperture and high hardness is used for puncture from the skin to the outside of the annulus fibrosus, and a thin needle needle tube 11 with a smaller aperture and low hardness is used for puncture from the annulus fibrosus to the nucleus pulposus, the two puncture needles are used in cooperation, the small aperture puncture needle is 3 cm longer than the large aperture puncture needle, the puncture needle head is provided with a scale, and the small aperture thin needle needle tube 11 can pass through the large aperture thick needle needle tube 1.

[0029] In need of using the fine needle needle tube 11 between, first take the installation ring body 6, the two limiting blocks 7 on the installation ring body 6 are embedded to the inside of two access slot 3, then rotate the installation ring body 6, make the limiting block 7 embed to the inside of the limiting slot 4, and let the first adsorption magnet 5 and the second adsorption magnet 8 magnetism and connect, at this moment, the installation ring body 6 is not easy to loosen, guarantee the stability of the installation ring body 6, then again make the fine needle needle tube 11 pass through the limiting guide ring 10, make the fine needle needle tube 11 more stable when puncture.

[0030] Finally, it should be noted that: the above only for the preferred embodiments of the present application have, and is not used to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, for the person skilled in the art, it still can be modified to the technical scheme recorded in the foregoing each embodiment, or to equivalent replacement for part of the technical features, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application, should be included in the scope of protection of the present application.

Claims

1. Intervertebral disc puncture trocar comprising a thick needle cannula (1), characterised in that: The top end of the thick needle needle tube (1) is fixedly connected with a thick needle needle cap (2), the inside of the thick needle needle cap (2) is movably provided with a mounting ring body (6), the inner wall of the mounting ring body (6) is connected with a guide assembly, and the guide assembly is provided with a thin needle needle tube (11); The outer surface of the mounting ring body (6) is fixedly connected with two limiting blocks (7), the inner wall of the thick needle needle cap (2) is provided with two vertically arranged entering grooves (3) and two horizontally arranged limiting grooves (4), the entering groove (3) is communicated with the corresponding limiting groove (4), the limiting block (7) is located in the corresponding limiting groove (4), and the magnetic attraction assembly is arranged between the limiting block (7) and the limiting groove (4).

2. The disc puncture trocar according to claim 1, characterized in that: The magnetic attraction assembly comprises a first adsorption magnet (5) and a second adsorption magnet (8), the first adsorption magnet (5) is fixedly connected in the limiting groove (4), the second adsorption magnet (8) is fixedly connected on the side wall of the limiting block (7), and the first adsorption magnet (5) and the second adsorption magnet (8) are magnetically attracted and connected.

3. The disc puncture trocar according to claim 1, characterized in that: The guide assembly comprises two connecting blocks (9) fixedly connected on the inner wall of the mounting ring body (6), the two connecting blocks (9) are symmetrically arranged, and the opposite ends of the two connecting blocks (9) are fixedly connected with a limiting guide ring (10) in common.

4. The disc puncture trocar of claim 1 wherein: The top end of the thin needle needle tube (11) is fixedly connected with a thin needle needle cap (12), and the outer surface of the thin needle needle tube (11) is provided with a scale line.

5. The disc puncture trocar according to claim 1, characterized in that: The diameter of the thin needle needle tube (11) is smaller than that of the thick needle needle tube (1).

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