An intra-needle puncture device for ultrasound visualization enhanced minimally invasive lumbar puncture

Abstract

The utility model discloses a kind of needle-in-needle puncture devices for ultrasound imaging enhanced minimally invasive lumbar puncture, the needle-in-needle puncture device includes guide needle, lumbar puncture needle and lumbar puncture auxiliary needle;The guide needle tube is hollow structure;The outer surface of one end of the guide needle tube is equipped with the first coating area of enhanced ultrasound imaging;The lumbar puncture needle includes lumbar puncture needle tube, and the lumbar puncture needle tube is located in the guide needle tube;The inside of the lumbar puncture needle tube is hollow structure;The outer surface of one end of the lumbar puncture needle tube is equipped with the second coating area of enhanced ultrasound imaging;The lumbar puncture auxiliary needle includes needle core, and the needle core is located in the lumbar puncture needle tube, and the needle core structure is compatible with the lumbar puncture needle tube structure.Compared with prior art, the needle-in-needle puncture device for ultrasound imaging enhanced minimally invasive lumbar puncture of the utility model improves the visual effect and operation accuracy under ultrasound guidance in puncture process.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, and in particular to an intraneedle puncture device for ultrasound-enhanced minimally invasive lumbar puncture. Background Technology

[0002] With advancements in anesthesiology and imaging techniques, ultrasound-guided lumbar puncture has become widely used. Current lumbar puncture techniques typically rely on manual manipulation by clinicians, and their accuracy is limited by various factors, including patient anatomical variations, physician clinical experience, and puncture skills. In elderly patients, obese patients, and patients with spinal anatomical abnormalities, the success rate of traditional puncture techniques is often low, potentially leading to puncture failure and damage to important neural structures.

[0003] Currently, most minimally invasive lumbar puncture devices on the market adopt a single design concept and lack an effective ultrasound visualization mechanism, which leads to the risk of drug leakage or improper puncture during the injection process.

[0004] Therefore, how to provide a needle-in-needle puncture device for ultrasound-enhanced minimally invasive lumbar puncture, so as to improve the puncture accuracy and the safety and effectiveness of drug injection under enhanced ultrasound guidance, is a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] In view of the problems existing in the prior art, the technical problem to be solved by this utility model is to provide a needle-in-needle puncture device for ultrasound-enhanced minimally invasive lumbar puncture, so as to improve the puncture accuracy, safety and drug injection effectiveness of traditional lumbar puncture techniques.

[0006] To achieve the above objectives, this utility model provides an intra-needle puncture device for ultrasound-enhanced minimally invasive lumbar puncture, the intra-needle puncture device comprising:

[0007] The guide needle includes a guide needle tube, which has a hollow structure and one end of the guide needle tube is beveled and pointed; the outer surface of one end of the guide needle tube is provided with a first coating area for enhanced ultrasound imaging.

[0008] A lumbar puncture needle, comprising a lumbar puncture needle tube located inside a guide needle tube, the lumbar puncture needle tube being detachably connected to the guide needle tube; the lumbar puncture needle tube having a hollow internal structure, one end of the lumbar puncture needle tube being a tapered, pointed, closed shape; and a second coating area for enhanced ultrasound imaging being provided on the outer surface of one end of the lumbar puncture needle tube.

[0009] A lumbar puncture auxiliary needle includes a needle core, which is a solid structure. The needle core is located inside the lumbar puncture needle tube, and the structure of the needle core is adapted to the structure of the lumbar puncture needle tube. The needle core and the lumbar puncture needle tube are detachably connected in contact.

[0010] In the first aspect, the guide needle further includes a guide needle seat, the interior of which is hollow, one end of which is fixedly connected to the other end of the guide needle tube, and the guide needle seat communicates with the interior of the guide needle tube.

[0011] In the first aspect, the lumbar puncture needle further includes a lumbar puncture needle seat, the lumbar puncture needle seat has a hollow internal structure, one end of the lumbar puncture needle seat is fixedly connected to the other end of the lumbar puncture needle tube, and the lumbar puncture needle seat communicates with the interior of the lumbar puncture needle tube; a spiral structure is provided on the inner side of the other end of the lumbar puncture needle seat.

[0012] In the first aspect, one end of the lumbar puncture needle tube is provided with a side hole, and the other end of the lumbar puncture needle seat is provided with a direction mark, and the side hole and the direction mark are located on the same axial straight line.

[0013] In the first aspect, the lumbar puncture auxiliary needle further includes a lumbar puncture needle cap, one end of which is fixedly connected to one end of the needle core, and the other end of the lumbar puncture needle cap is detachably and sealed to the lumbar puncture needle seat.

[0014] In the first aspect, a spiral structure is provided on the inner side of the other end of the waist needle holder.

[0015] In the first aspect, the guide needle tube, excluding the first coating area, is provided with a first annular coating for enhanced ultrasound imaging. The first annular coating includes several groups of first narrow annular coatings for enhanced ultrasound imaging and several first wide annular coatings for enhanced ultrasound imaging. The several groups of first narrow annular coatings and the several first wide annular coatings are evenly spaced apart. Any group of first narrow annular coatings is spaced 1 mm apart from any adjacent first wide annular coating. A group of first narrow annular coatings is spaced 1 mm apart from the first coating area. Each group of first narrow annular coatings includes five first narrow annular coatings. The five first narrow annular coatings are evenly spaced apart. Any two adjacent first narrow annular coatings are spaced 1 mm apart.

[0016] In the first aspect, the area of ​​the lumbar puncture needle tube other than the second coating area is provided with a second annular coating for enhanced ultrasound imaging. The second annular coating includes several groups of second narrow annular coatings for enhanced ultrasound imaging and several second wide annular coatings for enhanced ultrasound imaging. The several groups of second narrow annular coatings and the several second wide annular coatings are evenly spaced apart. Any group of second narrow annular coatings is spaced 1 mm apart from any adjacent second wide annular coating. A group of second narrow annular coatings is spaced 1 mm apart from the second coating area. Each group of second narrow annular coatings includes five second narrow annular coatings. The five second narrow annular coatings are evenly spaced apart. Any two adjacent second narrow annular coatings are spaced 1 mm apart.

[0017] In the first aspect, both the outer surface of one end of the guide needle tube and the outer surface of one end of the lumbar puncture needle tube are provided with annular grooves.

[0018] In the first aspect, the guide needle tube has a length of 30-60 mm, a diameter of 20G, and a length of 15-20 mm; the lumbar puncture needle tube has a length of 80-150 mm, a length of 15-20 mm, and a diameter of 25G.

[0019] In the first aspect, the guide needle tube, the guide needle seat, the lumbar puncture needle tube, the lumbar puncture needle seat, and the needle core are all made of medical high-strength alloy materials.

[0020] Beneficial effects:

[0021] This invention relates to a needle-in-needle puncture device for ultrasound-enhanced minimally invasive lumbar puncture, primarily comprising a guide needle, a lumbar puncture needle, and an auxiliary lumbar puncture needle. The guide needle has a hollow guide tube with a sharp puncture end, facilitating skin dilation and providing path guidance for subsequent lumbar puncture. One end of the guide needle tube has a first coating area for enhanced ultrasound imaging, improving the visibility of ultrasound imaging and providing visual guidance for the puncture path. The guide needle also includes a guide needle cap, which seals the outer opening of the guide needle seat when the guide needle is not in use, preventing obstructions from entering the guide needle tube through the guide needle seat opening. The lumbar puncture needle has a tapered tip, improving puncture efficiency and reducing tissue damage. The hollow interior of the needle tube facilitates the insertion of the auxiliary lumbar puncture needle core into the lumbar puncture needle tube. The insertion of the core provides rigidity and toughness support to the lumbar puncture needle tube, improving puncture sharpness and reducing overall discomfort for the patient. Simultaneously, it ensures that the lumbar puncture needle tube and core do not rupture during the puncture process. The device features a curved design, enhancing the stability and safety of the lumbar puncture needle during puncture. A second coating area on the outer surface of one end of the needle enhances ultrasound imaging visibility, providing ultrasound guidance during the puncture process. A side hole at one end of the needle allows for drug injection. A directional marker for the side hole is located on the needle holder, aligned with the side hole for easy identification of the injection direction. Furthermore, a first annular coating on the guide needle and a second annular coating on the lumbar puncture needle indicate the depth of the guide needle insertion and the depth reached by the lumbar puncture needle, making the depth of the guide needle insertion clear during ultrasound-guided puncture and simplifying the procedure. In summary, this invention provides an intra-needle puncture device for ultrasound-enhanced minimally invasive lumbar puncture, improving the visualization under ultrasound guidance during the puncture process, further enhancing operational accuracy, and reducing pain and discomfort for the patient during the puncture. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this specification or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of the combination of the lumbar puncture needle and the lumbar puncture auxiliary needle of this utility model;

[0024] Figure 2 This is a schematic diagram of the structure of the lumbar puncture auxiliary needle of this utility model;

[0025] Figure 3This is a schematic diagram of the guide pin structure of this utility model.

[0026] Figure label:

[0027] 1. Guide pin; 11. Guide pin tube; 12. Guide pin seat; 13. Guide pin cap;

[0028] 2. Lumbar puncture needle; 21. Lumbar puncture needle tube; 22. Lumbar puncture needle holder; 23. Side hole; 24. Direction marking;

[0029] 3. Auxiliary needle for waist threading; 31. Needle core; 32. Cap of waist threading needle;

[0030] 101. First coating area; 102. First annular coating;

[0031] 201, Second coating area; 202, Second annular coating. Detailed Implementation

[0032] The technical solutions in the embodiments of this specification will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this specification, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments in this specification are within the protection scope of this utility model.

[0033] Example 1

[0034] like Figures 1-3 As shown, this embodiment provides a needle-in-needle puncture device for ultrasound-enhanced minimally invasive lumbar puncture. The needle-in-needle puncture device for ultrasound-enhanced minimally invasive lumbar puncture includes: a guide needle 1, which includes a guide needle tube 11. The guide needle tube 11 has a hollow structure, and one end of the guide needle tube 11 is obliquely pointed. The outer surface of one end of the guide needle tube 11 is provided with a first coating area 101 for enhanced ultrasound imaging; and a lumbar puncture needle 2, which includes a lumbar puncture needle tube (21). The lumbar puncture needle tube 21 is located at the guide needle tube 11. Inside, the lumbar puncture needle tube 21 is detachably connected to the guide needle tube 11; the lumbar puncture needle tube 21 has a hollow internal structure, and one end of the lumbar puncture needle tube 21 is tapered and closed; the outer surface of one end of the lumbar puncture needle tube 21 is provided with a second coating area 201 for enhanced ultrasound imaging; the lumbar puncture auxiliary needle 3 includes a needle core 31, which has a solid structure; the needle core 31 is located inside the lumbar puncture needle tube 21, and the structure of the needle core 31 is adapted to the structure of the lumbar puncture needle tube 21, and the needle core 31 is detachably connected to the lumbar puncture needle tube 21.

[0035] This utility model discloses an intra-needle puncture device for ultrasound-enhanced minimally invasive lumbar puncture, mainly comprising a guide needle 1, a lumbar puncture needle 2, and a lumbar puncture auxiliary needle 3. The guide needle 1 has a hollow guide needle tube 11, and its puncture end is a sharp end, which facilitates skin dilation and provides path guidance for subsequent puncture of the lumbar puncture needle tube 21 of the lumbar puncture needle 2. One end of the guide needle tube 11 has a first coating area 101 for enhanced ultrasound imaging on its outer surface, improving the visibility of ultrasound imaging and providing visual operation for puncture path guidance. The guide needle 1 also includes a guide needle cap 13, which is used for... When the guide needle 1 is not in use, the outer opening of the guide needle seat 12 is closed to prevent obstructions from entering the guide needle tube 11 through the opening of the guide needle seat 12. The lumbar puncture needle tube 21 has a tapered tip, which improves the puncture effect and reduces tissue damage. The interior of the lumbar puncture needle tube 21 is hollow, which facilitates the insertion of the needle core 31 of the lumbar puncture auxiliary needle 3 into the interior of the lumbar puncture needle tube 21. The insertion of the needle core 31 into the lumbar puncture needle tube 21 provides the lumbar puncture needle tube 21 with rigidity and toughness support, improves the sharpness of puncture, and thus reduces the overall discomfort of the patient. At the same time, it ensures that the lumbar puncture needle tube 21 and the needle core 31 do not collide during the puncture process. The bending design improves the stability and safety of the lumbar puncture needle 21 during puncture. A second coating area 201 enhancing ultrasound imaging is provided on the outer surface of one end of the lumbar puncture needle 21, improving the visibility of ultrasound imaging and providing ultrasound guidance during puncture. A side hole 23 is provided at one end of the lumbar puncture needle 21 for drug injection. A direction marker 24 for the side hole 23 is provided on the lumbar puncture needle seat 22, and the direction marker 24 is located on the same side as the side hole 23, facilitating the identification of the injection direction. In addition, a first annular coating 102 is provided on the guide needle tube 11. A second annular coating 202 is also provided on the lumbar puncture needle tube 21 to indicate to the operator the depth reached by the guide needle tube 11 and the lumbar puncture needle tube 21, so that the depth of the guide needle 1 and the lumbar puncture needle 2 can be clearly identified during the ultrasound-guided puncture process, making the operation steps simpler and more intuitive. In summary, the needle-in-needle puncture device for ultrasound-enhanced minimally invasive lumbar puncture of this utility model improves the visualization effect under ultrasound guidance during the puncture process, further improves the accuracy of the operation, and reduces the pain and discomfort of the patient during the puncture process.

[0036] In some possible implementations, the guide needle 1 further includes a guide needle seat 12, the interior of which is hollow, one end of which is fixedly connected to the other end of the guide needle tube 11, and the guide needle seat 12 communicates with the interior of the guide needle tube 11.

[0037] Specifically, the guide needle tube and the guide needle seat are connected internally, and the channels inside the guide needle tube and the guide needle seat have the same central axis, which facilitates the subsequent guidance of the lumbar puncture needle puncture path.

[0038] In some possible implementations, the lumbar puncture needle 2 further includes a lumbar puncture needle seat 22, which has a hollow internal structure. One end of the lumbar puncture needle seat 22 is fixedly connected to the other end of the lumbar puncture needle tube 21, and the lumbar puncture needle seat 22 communicates with the interior of the lumbar puncture needle tube 21. A spiral structure is provided on the inner side of the other end of the lumbar puncture needle seat 22.

[0039] Specifically, the lumbar puncture needle cannula and the lumbar puncture needle hub are internally connected, and the channels inside the lumbar puncture needle cannula and the lumbar puncture needle hub share the same central axis, facilitating the insertion of the needle core. During the process of the lumbar puncture needle being guided by the guide needle, the lumbar puncture needle cannula passes through the guide needle cannula. To prevent the lumbar puncture needle hub from being unable to enter the guide needle hub when the final puncture site is relatively deep, thus affecting the puncture, the external structure of the lumbar puncture needle hub is adapted to the internal structure of the guide needle hub, and the lumbar puncture needle hub and the guide needle hub are detachably connected. After the puncture is completed, the needle core is removed for drug injection. The inner side of the other end of the lumbar puncture needle hub is provided with a spiral structure to ensure a sealed connection between the lumbar puncture needle hub and the drug injector, effectively preventing drug leakage during the injection process.

[0040] In some possible implementations, one end of the lumbar puncture needle tube 21 is provided with a side hole 23, and the other end of the lumbar puncture needle seat 22 is provided with a direction mark 24, and the side hole 23 and the direction mark 24 are located on the same axial straight line.

[0041] Specifically, the side hole facilitates drug injection and diffusion. Placing the side hole on the side also allows for the placement of directional markings on the same side, which indicate the direction of the side hole in the lumbar puncture needle, thus ensuring the accuracy of the drug flow direction during injection.

[0042] In some possible implementations, the lumbar puncture auxiliary needle 3 further includes a lumbar puncture needle cap 32, one end of which is fixedly connected to one end of the needle core 31, and the other end of the lumbar puncture needle cap 32 is detachably and sealed to the other end of the lumbar puncture needle seat 22.

[0043] Specifically, the needle core is fixedly connected to the lumbar puncture needle cap, making it easy to remove the needle core and inject medication after the puncture is completed.

[0044] In some possible implementations, the guide needle tube 11, excluding the first coating area 101, is provided with a first annular coating 102 for enhanced ultrasound imaging. The first annular coating 102 includes several groups of first narrow annular coatings and several first wide annular coatings for enhanced ultrasound imaging. The several groups of first narrow annular coatings and the several first wide annular coatings are evenly spaced apart. Any group of first narrow annular coatings is spaced 1 mm apart from any adjacent first wide annular coating. A group of first narrow annular coatings is spaced 1 mm apart from the first coating area (101). Each group of first narrow annular coatings includes five first narrow annular coatings. The five first narrow annular coatings are evenly spaced apart. Any two adjacent first narrow annular coatings are spaced 1 mm apart.

[0045] Specifically, the first annular coating in the first coating area is a development-enhancing coating, used to enhance ultrasonic development and ensure excellent development effect under ultrasonic guidance. The development-enhancing coating is a polymer coating containing a large number of microbubbles, prepared by physically blending high acoustic impedance inorganic powder into a polyethylene matrix or polypropylene matrix. The inorganic powder includes barium sulfate, and the amount of inorganic powder added is 3 times or more than that of the polyethylene matrix or polypropylene matrix. Several groups of first narrow annular coatings and several groups of first wide annular coatings for enhanced ultrasonic development are set, with each group of first narrow annular coatings and each group of first wide annular coatings spaced 1 mm apart. In addition, a group of first... The narrow annular coating is spaced 1 mm apart from the first coating area. Each group of first narrow annular coatings includes five first narrow annular coatings, and any two adjacent first narrow annular coatings are spaced 1 mm apart, so that the first coating area is spaced 1 mm apart from the nearest first narrow annular coating. Starting from the first coating area, every five first narrow annular coatings form a first wide annular coating. The length of the first coating area is 20 mm, the width of each first narrow annular coating can be 1 mm, and the thickness of each first wide annular coating can be 2 mm. This is used to indicate that the puncture depth has reached 5 cm or 10 cm, etc. During ultrasound-guided puncture, the depth of the guide needle insertion can be clearly identified, making the operation steps simpler and more intuitive.

[0046] In some possible implementations, the area of ​​the lumbar puncture needle 21 other than the second coating area 201 is provided with a second annular coating 202 for enhanced ultrasound imaging. The second annular coating 202 includes several groups of second narrow annular coatings for enhanced ultrasound imaging and several second wide annular coatings for enhanced ultrasound imaging. The several groups of second narrow annular coatings and the several second wide annular coatings are evenly spaced apart. Any group of second narrow annular coatings is 1 mm apart from any adjacent second wide annular coating. A group of second narrow annular coatings is 1 mm apart from the second coating area 201. Each group of second narrow annular coatings includes five second narrow annular coatings. The five second narrow annular coatings are evenly spaced apart. Any two adjacent second narrow annular coatings are 1 mm apart.

[0047] Specifically, both the second coating area and the second annular coating are development-enhancing coatings used to enhance ultrasonic development and ensure excellent development results under ultrasonic guidance. The development-enhancing coating is a polymer coating containing numerous microbubbles, prepared by physically blending high-acoustic-impedance inorganic powders into a polyethylene matrix or polypropylene matrix. The inorganic powders include barium sulfate, and the amount of inorganic powder added is three times or more than that of the polyethylene matrix or polypropylene matrix. Several sets of second narrow annular coatings and several sets of second wide annular coatings for enhanced ultrasonic development are arranged, with each set of second narrow annular coatings spaced 1 mm apart from each second wide annular coating. In addition, each set of second narrow annular coatings... The annular coating and the second coating area are spaced 1 mm apart. Each group of second narrow annular coatings includes five second narrow annular coatings, and any two adjacent second narrow annular coatings are spaced 1 mm apart, so that the second coating area is spaced 1 mm apart from the nearest second narrow annular coating. Starting from the second coating area, every five second narrow annular coatings form a second wide annular coating. The length of the second coating area is 20 mm, the width of each second narrow annular coating can be 1 mm, and the thickness of each second wide annular coating can be 2 mm. This is used to indicate that the puncture depth has reached 5 cm or 10 cm, so that the depth of the lumbar puncture needle can be clearly identified during ultrasound-guided puncture, making the operation simpler and more intuitive.

[0048] In some possible implementations, annular grooves are provided on the outer surface of one end of the guide needle tube 11 and the outer surface of one end of the lumbar puncture needle tube 21.

[0049] Specifically, the annular grooves on the outer surface of one end of the guide needle tube and the outer surface of one end of the lumbar puncture needle tube are microgrooves, which are used to increase the texture of the metal surface, form a high echo reflective surface for ultrasound, increase the difference in brightness between the puncture imaging and the surrounding tissue, so as to enhance the visualization effect under ultrasound guidance, thereby improving the accuracy and safety of the puncture treatment process.

[0050] In some possible implementations, the guide needle tube 11 has a length of 30-60 mm and a thickness of 20G, the guide needle seat 12 has a length of 15-20 mm; the lumbar puncture needle tube 21 has a length of 80-150 mm, the lumbar puncture needle seat 22 has a length of 15-20 mm, and the lumbar puncture needle tube 21 has a thickness of 25G.

[0051] Specifically, the length of the guide needle seat is set to 15-20 mm, and the length of the waist needle seat is set to 15-20 mm, which further improves the stability of operation.

[0052] In some possible implementations, the guide needle tube 11, the guide needle seat 12, the lumbar puncture needle tube 21, the lumbar puncture needle seat 22, and the needle core 31 are all made of medical high-strength alloy materials.

[0053] Specifically, medical high-strength alloy materials such as alloy steel, titanium alloys, or nano-ceramic composites have good strength, ensuring sufficient resistance to bending and deformation during the puncture process to improve the stability and precision of the operation.

[0054] The method of using the needle-in-needle puncture device for ultrasound-enhanced minimally invasive lumbar puncture according to this utility model is as follows: under the guidance of ultrasound equipment, the target intervertebral space is accurately located and real-time ultrasound guidance is provided; then, under real-time ultrasound guidance, the skin is expanded by a guide needle, and then the lumbar puncture needle is inserted through the guide needle to complete the puncture; once the puncture position is confirmed, the needle core is removed, the lumbar puncture needle is retained, and the medication is effectively injected.

[0055] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A needle-in-needle puncture device for ultrasound-enhanced minimally invasive lumbar puncture, characterized in that, The intra-needle puncture device for ultrasound-enhanced minimally invasive lumbar puncture includes: Guide needle (1), the guide needle (1) includes guide needle tube (11), the guide needle tube (11) has a hollow structure, and one end of the guide needle tube (11) is obliquely pointed; the outer surface of one end of the guide needle tube (11) is provided with a first coating area (101) for enhanced ultrasound imaging. A lumbar puncture needle (2) includes a lumbar puncture needle tube (21), which is located inside the guide needle tube (11). The lumbar puncture needle tube (21) is detachably connected to the guide needle tube (11). The lumbar puncture needle tube (21) has a hollow internal structure, and one end of the lumbar puncture needle tube (21) is closed with a tapered tip. The outer surface of one end of the lumbar puncture needle tube (21) is provided with a second coating area (201) for enhanced ultrasound imaging. A lumbar puncture auxiliary needle (3) includes a needle core (31), which is solid; the needle core (31) is located inside the lumbar puncture needle tube (21), and the structure of the needle core (31) is adapted to the structure of the lumbar puncture needle tube (21). The needle core (31) is detachably connected to the lumbar puncture needle tube (21).

2. The needle-in-needle puncture device for ultrasound-enhanced minimally invasive lumbar puncture as described in claim 1, characterized in that: The guide needle (1) also includes a guide needle seat (12), the interior of which is hollow. One end of the guide needle seat (12) is fixedly connected to the other end of the guide needle tube (11), and the guide needle seat (12) communicates with the interior of the guide needle tube (11).

3. The needle-in-needle puncture device for ultrasound-enhanced minimally invasive lumbar puncture as described in claim 2, characterized in that: The lumbar puncture needle (2) also includes a lumbar puncture needle seat (22), which has a hollow structure inside. One end of the lumbar puncture needle seat (22) is fixedly connected to the other end of the lumbar puncture needle tube (21), and the lumbar puncture needle seat (22) communicates with the interior of the lumbar puncture needle tube (21). The other end of the lumbar puncture needle seat (22) is provided with a spiral structure on its inner side.

4. The needle-in-needle puncture device for ultrasound-enhanced minimally invasive lumbar puncture as described in claim 3, characterized in that: One end of the lumbar puncture needle tube (21) is provided with a side hole (23), and the other end of the lumbar puncture needle seat (22) is provided with a direction mark (24). The side hole (23) and the direction mark (24) are located on the same axial straight line.

5. The needle-in-needle puncture device for ultrasound-enhanced minimally invasive lumbar puncture as described in claim 4, characterized in that: The lumbar puncture auxiliary needle (3) also includes a lumbar puncture needle cap (32), one end of which is fixedly connected to one end of the needle core (31), and the other end of which is detachably and sealed to the lumbar puncture needle seat (22).

6. The needle-in-needle puncture device for ultrasound-enhanced minimally invasive lumbar puncture as described in claim 5, characterized in that: The guide needle tube (11) is provided with a first annular coating (102) for enhanced ultrasound imaging in the area other than the first coating area (101). The first annular coating (102) includes several groups of first narrow annular coatings for enhanced ultrasound imaging and several first wide annular coatings for enhanced ultrasound imaging. The several groups of first narrow annular coatings and the several first wide annular coatings are evenly spaced apart. Any group of first narrow annular coatings is 1 mm away from any adjacent first wide annular coating. A group of first narrow annular coatings is 1 mm away from the first coating area (101). Each group of first narrow annular coatings includes five first narrow annular coatings. The five first narrow annular coatings are evenly spaced apart. Any two adjacent first narrow annular coatings are 1 mm apart.

7. The needle-in-needle puncture device for ultrasound-enhanced minimally invasive lumbar puncture as described in claim 6, characterized in that: The lumbar puncture needle tube (21) is provided with a second annular coating (202) for enhanced ultrasound imaging in the area other than the second coating area (201). The second annular coating (202) includes several groups of second narrow annular coatings for enhanced ultrasound imaging and several second wide annular coatings for enhanced ultrasound imaging. The several groups of second narrow annular coatings and the several second wide annular coatings are evenly spaced apart. Any group of second narrow annular coatings is 1 mm apart from any adjacent second wide annular coating. A group of second narrow annular coatings is 1 mm apart from the second coating area (201). Each group of second narrow annular coatings includes five second narrow annular coatings. The five second narrow annular coatings are evenly spaced apart. Any two adjacent second narrow annular coatings are 1 mm apart.

8. The needle-in-needle puncture device for ultrasound-enhanced minimally invasive lumbar puncture as described in claim 7, characterized in that: Both the outer surface of one end of the guide needle tube (11) and the outer surface of one end of the lumbar puncture needle tube (21) are provided with annular grooves.

9. The needle-in-needle puncture device for ultrasound-enhanced minimally invasive lumbar puncture as described in claim 8, characterized in that: The length of the guide needle tube (11) is 30-60 mm, the thickness of the guide needle tube (11) is 20G, the length of the guide needle seat (12) is 15-20 mm; the length of the lumbar puncture needle tube (21) is 80-150 mm, the length of the lumbar puncture needle seat (22) is 15-20 mm, and the thickness of the lumbar puncture needle tube (21) is 25G.

10. The needle-in-needle puncture device for ultrasound-enhanced minimally invasive lumbar puncture as described in claim 9, characterized in that: The guide needle tube (11), the guide needle seat (12), the lumbar puncture needle tube (21), the lumbar puncture needle seat (22), and the needle core (31) are all made of medical high-strength alloy material.

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