Thyroid nodule needle biopsy auxiliary device

Abstract

The invention provides a thyroid nodule needle biopsy auxiliary device, and belongs to the field of medical instruments. A thyroid nodule needle biopsy auxiliary device comprises a supporting structure, a positioning structure and a fixing structure. Each supporting structure comprises a supporting foot, a supporting leg and a fixing block, and the supporting structures are symmetrically arranged; the positioning structure comprises a rotating shaft, a positioning ring and a rotating ring, and a fixing structure is mounted on the rotating ring; the fixing structure comprises a hinge, a hand fixing device and a puncture fixing device. Compared with the prior art, the puncture fixing device has the beneficial effects that the puncture precision is improved, the stability is enhanced, the operation convenience is improved, the dependence on the technical level of a doctor is reduced, the patient experience is improved, the hand fixing device is reasonable in design, the constraint discomfort is reduced, and the puncture pain and discomfort are reduced through the puncture fixing device.

Description

Technical Field

[0001] This invention belongs to the field of medical devices, specifically relating to an auxiliary device for thyroid nodule puncture biopsy. Background Technology

[0002] Thyroid nodules are a common clinical condition caused by various factors, and their diagnosis is crucial for the treatment of thyroid diseases. Thyroid fine-needle aspiration biopsy, as an effective diagnostic method, is routinely used as the first step in the diagnosis of nodular thyroid diseases. Ultrasound-guided fine-needle aspiration biopsy (FNAB) has become the preferred pathological diagnostic method for thyroid nodules before surgery due to its advantages such as high efficiency, minimal invasiveness, safety, and good cost-effectiveness, achieving an accuracy rate of 85%–94% in differentiating between benign and malignant nodules. Currently, this technology is widely used in clinical practice and continues to evolve. For example, the 2025 edition of the "Chinese Expert Consensus and Operational Guidelines for Ultrasound-Guided Fine-Needle Aspiration Biopsy of Thyroid Nodules and Cervical Lymph Nodes" has constructed a precise system for the entire diagnosis and treatment of thyroid nodules through multidisciplinary integration, technical standardization, and hierarchical management strategies.

[0003] However, existing thyroid fine-needle aspiration biopsy techniques and related devices still have some shortcomings. On the one hand, the biopsy procedure is relatively cumbersome, usually requiring the cooperation of multiple people. The attending physician needs to hold the ultrasound probe in one hand to aim at the thyroid gland, and hold the anesthetic needle or puncture needle in the other hand, while the nurse passes the anesthetic needle and puncture needle. This requires a high level of skill from the physician and greatly affects the efficiency of the thyroid biopsy. On the other hand, existing puncture devices also have room for improvement in terms of stability, positioning accuracy, and patient comfort. For example, during the puncture, the physician needs to hold the ultrasound probe, and hand tremors may affect the accuracy of the puncture; some devices are not stable enough when fixing the patient's position, especially the neck position, which may cause the puncture needle to deviate; moreover, the position of the ultrasound probe needs to be constantly adjusted during the puncture, and the lack of effective fixation and guidance devices affects the efficiency and accuracy of the puncture. In addition, existing devices are also inadequate in terms of hand fixation and puncture needle fixation, making it difficult to meet the needs of precise puncture.

[0004] Existing thyroid fine-needle aspiration biopsy techniques and related devices mainly suffer from problems such as cumbersome operation, high requirements for doctors' skills, insufficient stability, and limited positioning accuracy. Summary of the Invention

[0005] The purpose of this invention is to provide an auxiliary device for thyroid nodule fine-needle biopsy, addressing the shortcomings of existing technologies.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is: an auxiliary device for thyroid nodule puncture biopsy, comprising a support structure, a positioning structure, and a fixing structure; The support structure includes support feet, support legs are mounted on the support feet, and a fixing block is provided on the top of the support legs. The support structure is symmetrically arranged. The positioning structure includes a rotating shaft, a positioning ring mounted on the rotating shaft, a rotating ring inside the positioning ring, and a fixing structure mounted on the rotating ring; The fixing structure includes a hinge, on which a hand fixing device is installed, and a screw is inserted inside the hinge, with a piercing fixing device at the end of the screw.

[0007] Furthermore, the support foot is equipped with a support leg, which is fixedly connected to the support foot. The support leg is a telescopic and adjustable support leg.

[0008] Furthermore, the support legs are height-adjustable using a pneumatic system and are connected to an external air pump.

[0009] Furthermore, the rotating shaft is fixedly installed inside the fixed block, with the two rotating shafts facing each other. The positioning ring is annular and is a split positioning ring. The split part of the positioning ring has a groove that is rotatably connected to the rotating shaft. The inner side of the split positioning ring has a groove, and the rotating ring and the groove are connected in a fitting manner. A rubber pad is installed on the inner ring of the rotating ring.

[0010] Furthermore, the hinges are symmetrically distributed and fixedly connected to the rotating ring. Hand fixing clips are installed on the hinges. The hand fixing clips are arc-shaped and have a return spring on the outside. One end of the return spring is fixed to the hand fixing clip, and the other end is fixed to the return plate.

[0011] Furthermore, the hand fixing clips are symmetrically distributed in a semi-circular shape, with the ends of the hand fixing clips on both sides that are away from the rotating ring contacting each other and aligned.

[0012] Furthermore, the reset plate is fixed on the rotating ring, and the reset plates are symmetrically distributed within the same semicircle. The reset plate is provided with a spring mounting groove.

[0013] Furthermore, the hinge is a three-section hinge, with a through hole at the center of each of the three sections. The through holes at both ends of the hinge are threaded holes, while the through hole in the middle section is a smooth hole with a diameter larger than that of the threaded hole.

[0014] Furthermore, the puncture fixation device includes a fixing plate, which is fitted onto the screws on both sides through holes at both ends. The fixing plate has a puncture needle limiting hole at its center, a puncture needle limiting cylinder at the outer edge of the puncture needle limiting hole, and a needle limiting hole at the end of the puncture needle limiting cylinder.

[0015] Furthermore, an adjusting nut is provided on the side of the fixing plate away from the hand fixing device. The adjusting nuts are symmetrically installed at the end of the screw, and an adjusting nut is also provided at the other end of the screw.

[0016] Compared with existing technologies, the beneficial effects of this invention are: improved puncture accuracy, as the unique positioning structure can accurately locate thyroid nodules and ensure accurate needle insertion into the target nodule; enhanced stability, with symmetrically arranged support feet and adjustable support legs adaptable to different operating scenarios, reducing needle deviation; improved ease of operation, with a reasonable fixation structure design allowing a single doctor to complete the puncture biopsy, simplifying the process and saving time and medical resources; reduced reliance on the doctor's skill level, enabling even inexperienced doctors to easily perform the procedure, improving the diagnostic level of primary healthcare institutions; and improved patient experience, with a reasonable hand fixation device design reducing discomfort and minimizing puncture pain and discomfort. Attached Figure Description

[0017] Figure 1 This is a front view of an embodiment of the present invention; Figure 2 This is a perspective view of an embodiment of the present invention; Figure 3 This is a three-dimensional embodiment of the present invention. Figure 2 ; Figure 4 This is a rear view of an embodiment of the present invention; Figure 5 This is a side view of an embodiment of the present invention; Figure 6 This is a three-dimensional embodiment of the present invention. Figure 3 ; Figure 7 This is a top view of an embodiment of the present invention.

[0018] Among them, 1. Support structure, 101. Support foot, 102. Support leg, 103. Fixing block, 104. Support foot; 2. Positioning structure, 201. Rotating shaft, 202. Positioning ring, 203. Rotating ring, 204. Groove, 205. Rubber pad; 3. Fixing structure, 301. Hinge, 302. Hand fixing device, 303. Screw, 304. Puncture fixing device, 305. Hand fixing clip, 306. Return spring, 307. Return plate, 308. Spring mounting groove, 309. Fixing plate, 310. Puncture needle limiting hole, 311. Puncture needle limiting cylinder, 312. Needle limiting hole, 313. Adjusting nut. Detailed Implementation

[0019] The following description, in conjunction with the accompanying drawings, further illustrates this embodiment. These embodiments are merely for illustrating the technical solution of the present invention more clearly and should not be construed as limiting the scope of protection of the present invention.

[0020] Example like Figure 1 As shown, a thyroid nodule fine-needle biopsy auxiliary device includes a support structure 1, a positioning structure 2, and a fixing structure 3. like Figure 2 As shown, the support structure 1 includes a support foot 101, a support leg 102 is installed on the support foot 101, and a fixing block 103 is provided on the top of the support leg 102. The support structure 1 is symmetrically arranged. The positioning structure 2 includes a rotating shaft 201, a positioning ring 202 mounted on the rotating shaft 201, a rotating ring 203 inside the positioning ring 202, and a fixing structure 3 mounted on the rotating ring 203; The fixing structure 3 includes a hinge 301, a hand fixing device 302 is installed on the hinge 301, a screw 303 is inserted inside the hinge, and a piercing fixing device 304 is provided at the end of the screw 303.

[0021] Furthermore, a support leg 104 is installed on the support foot 101, and a support leg 102 is fixedly connected to the support foot 101. The support leg 102 is a telescopic and adjustable support leg, and the support foot is hinged to the support foot to increase the support area of ​​the support foot.

[0022] Furthermore, the support leg 102 is height-adjustable pneumatically and is connected to an external air pump.

[0023] The support structure consists of support feet 101, support legs 102, and fixing blocks 103, and the support structure is symmetrically arranged. This symmetrical arrangement ensures the stability of the device during use and guarantees the smooth execution of puncture biopsy procedures. The support feet 104 installed on the support feet 101 increase the contact area between the device and the ground, improving the stability of the device and preventing it from tipping over due to patient movement or improper doctor operation during puncture. The support legs 102 are pneumatically adjustable with an external air pump. This design makes the height adjustment of the support legs more convenient and precise, quickly adapting to the positioning needs of different patients and improving operational efficiency.

[0024] Furthermore, the rotating shaft 201 is fixedly installed inside the fixed block 103, with the two rotating shafts 201 facing each other. The positioning ring 202 is annular and is a split positioning ring 202. The split part of the positioning ring 202 is provided with a groove that is rotatably connected to the rotating shaft 201. The inner side of the split positioning ring 202 is provided with a groove 204. The rotating ring 203 and the groove 204 are connected in cooperation. A rubber pad 205 is installed on the inner ring of the rotating ring 203.

[0025] The positioning structure includes a rotating shaft 201, a positioning ring 202, and a rotating ring 203. The rotating shaft 201 is fixedly installed inside the fixing block 103, with the two rotating shafts 201 facing each other. This facing arrangement provides stable support and a center of rotation, ensuring the smooth rotation of the positioning ring 202. The positioning ring 202 is annular and has a split design. A groove at the split point allows for rotatable connection with the rotating shaft 201. This split design allows the positioning ring 202 to flexibly adjust its angle to adapt to different puncture sites. The rotating ring 203 engages with the groove 204 on the inner side of the positioning ring 202. A rubber pad 205 is installed on the inner ring. The rubber pad 205 increases friction, preventing the puncture needle from shifting due to slippage during puncture and improving puncture accuracy.

[0026] Furthermore, the hinges 301 are symmetrically distributed and fixedly connected to the rotating ring 203. A hand fixing clip 305 is installed on the hinge 301. The hand fixing clip 305 is arc-shaped. A return spring 306 is provided on the outside of the hand fixing clip 305. One end of the return spring 306 is fixed to the hand fixing clip 305, and the other end is fixed to the return plate 307.

[0027] Furthermore, the hand fixing clips 305 are symmetrically distributed in a semi-circular shape, with the ends of the hand fixing clips 305 on both sides that are away from the one connected to the rotating ring 203 contacting each other and aligned.

[0028] Furthermore, the reset plate 307 is fixed on the rotating ring 203. The reset plates 307 are symmetrically distributed within the same semicircle, and the reset plate 307 is provided with a spring mounting groove 308.

[0029] Furthermore, hinge 301 is a three-section hinge, with a through hole at the center of each of the three sections of hinge 301. The through holes at both ends of hinge 301 are threaded holes, while the through hole in the middle section is a smooth hole with a diameter larger than that of the threaded hole.

[0030] like Figure 3-4 As shown, the puncture fixation device 304 further includes a fixing plate 309. The fixing plate 309 is sleeved on the screws 303 on both sides through holes at both ends. The fixing plate 309 has a puncture needle limiting hole 310 at its center, a puncture needle limiting cylinder 311 on the outer edge of the puncture needle limiting hole 310, and a needle limiting hole 312 at the end of the puncture needle limiting cylinder 311.

[0031] like Figure 5 As shown, further, an adjusting nut 313 is provided on the side of the fixing plate 309 away from the hand fixing device 302. The adjusting nut 313 is symmetrically installed at the end of the screw 303, and the other end of the screw 303 is also provided with an adjusting nut 313.

[0032] like Figure 6-7As shown, the fixing structure includes a hinge 301, a hand fixation device 302, a screw 303, and a puncture fixation device 304. The hinges 301 are symmetrically distributed on the rotating ring 203. This symmetrical distribution ensures the stability and balance of the hand fixation device 302, preventing unnecessary pressure on the hand during fixation. The hand fixation clip 305 is arc-shaped, with a return spring 306 on its outer side. One end of the return spring 306 is fixed to the hand fixation clip 305, and the other end is fixed to the return plate 307. This design enables automatic reset of the hand fixation clip 305, facilitating the fixation and release of the patient's hand and improving operational convenience. The puncture fixation device 304 includes a fixation plate 309, a puncture needle limiting hole 310, a puncture needle limiting cylinder 311, and a needle tip limiting hole 312. This multi-level limiting design precisely controls the puncture depth and direction of the puncture needle, ensuring accurate insertion of the puncture needle into the target nodule and improving the accuracy and safety of the puncture. An adjusting nut 313 is provided on the side of the fixing plate 309 away from the hand fixing device 302. The adjusting nut 313 is symmetrically installed at the end of the screw 303. This design can easily adjust the position of the puncture fixing device 304 to adapt to the differences in the anatomical structure of different patients and improve the versatility and applicability of the device.

[0033] From the perspective of inventive concept, this invention provides a stable, accurate, and convenient auxiliary device for thyroid nodule fine-needle aspiration biopsy by organically combining a support structure, a positioning structure, and a fixing structure, solving the problems of insufficient stability, limited positioning accuracy, and cumbersome operation in existing technologies. In terms of solving technical problems, this invention adapts to the different patient positions by pneumatically adjusting the height of the support leg 102; it achieves flexible adjustment of the puncture angle through the cooperation of the split positioning ring 202 and the rotating ring 203; and it improves the accuracy and safety of the puncture through the synergistic effect of the hand fixing device 302 and the puncture fixing device 304. These innovative designs give this invention significant advantages and application prospects in the field of thyroid nodule fine-needle aspiration biopsy.

[0034] Example 2: I. Experimental Preparation and Implementation Process This experiment aimed to verify the performance of an auxiliary device for thyroid nodule fine-needle aspiration biopsy. One hundred patients who underwent thyroid nodule fine-needle aspiration biopsy at a hospital from January to June 2024 were selected as the study subjects and randomly divided into an experimental group and a control group, with 50 patients in each group. The experimental group used the device of this invention for fine-needle aspiration biopsy, while the control group used the traditional method. All patients signed informed consent forms, and this study was approved by the hospital's ethics committee.

[0035] Before the experiment, the device of this invention was debugged and calibrated to ensure that all components were operating normally. The support feet 101 of the support structure were firmly installed, and the support feet 104 were in stable contact with the ground. The support legs 102 were pneumatically adjustable in height. According to the patient's position and operational needs, the height was adjusted to a suitable level by an external air pump. The adjustment range was 10cm to 50cm to ensure the stability of the device. The rotating shaft 201 of the positioning structure was fixedly installed inside the fixing block 103. The two rotating shafts 201 were arranged opposite each other. The positioning ring 202 was annular and designed as a split unit. The split part had a groove that rotatably connected to the rotating shaft 201. The rotating ring 203 was connected to the groove 204 on the inner side of the positioning ring 202. A rubber pad 205 was installed on the inner ring of the rotating ring 203 to ensure that the positioning ring 202 and the rotating ring 203 rotated flexibly and stably, and the rubber pad 205 increased friction to prevent slippage.

[0036] During the experiment, the patient lies supine with their neck slightly elevated to fully expose the thyroid gland. Medical personnel place the device of this invention on the patient's thyroid gland and, using the stabilizing support structure, adjust the positioning structure to align the positioning ring 202 and the rotating ring 203 with the thyroid nodule. The hinges 301 of the fixing structure are symmetrically distributed on the rotating ring 203. A hand fixation clip 305 is mounted on the hinge 301. The hand fixation clip 305 is arc-shaped and has a return spring 306 on its outer side. One end of the return spring 306 is fixed to the hand fixation clip 305, and the other end is fixed to the return plate 307. Medical personnel place the patient's hand inside the hand fixation clip 305, using the elasticity of the return spring 306 to fix the patient's hand and prevent hand movement from affecting the puncture. The puncture fixation device 304 includes a fixation plate 309, which is fitted onto the screws 303 on both sides through holes at both ends. The fixation plate 309 has a puncture needle limiting hole 310 at its center, and a puncture needle limiting sleeve 311 at the outer edge of the puncture needle limiting hole 310. The end of the puncture needle limiting sleeve 311 has a needle tip limiting hole 312. Medical personnel pass the puncture needle through the puncture needle limiting hole 310 and the puncture needle limiting sleeve 311, and control the puncture depth through the needle tip limiting hole 312 to perform a puncture biopsy. An adjusting nut 313 is located on the side of the fixation plate 309 away from the hand fixation device 302. The adjusting nuts 313 are symmetrically installed at the ends of the screws 303, and their position can be adjusted to accommodate differences in the anatomical structures of different patients.

[0037] During the puncture, medical staff observed the stability, positioning accuracy, and ease of operation of the device, and recorded data such as puncture time and sample quality. In the experimental group, the puncture time was 5 to 15 minutes, with an average puncture time of 8.5 minutes; the excellent sample quality rate was 96% (48 / 50). In the control group, the puncture time was 10 to 20 minutes, with an average puncture time of 14.5 minutes; the excellent sample quality rate was 82% (41 / 50).

[0038] II. Experimental Data Table Table 1. Experimental Data Recording Sheet for Thyroid Nodule Fine-needle Biopsy Auxiliary Device

[0039] III. Tabular Data Analysis Analysis of the experimental data in Table 1 clearly demonstrates the significant advantages and innovations of the thyroid nodule biopsy auxiliary device of this invention in clinical applications. Regarding puncture time, the average puncture time in the experimental group was 8.46 minutes, significantly shorter than the 14.44 minutes in the control group. This indicates that the device of this invention can effectively improve puncture efficiency, reduce patient waiting time, and increase the utilization rate of medical resources. The reason for this is that the device of this invention has a stable support structure, a flexible positioning structure, and a convenient fixing structure, eliminating the need for medical personnel to frequently adjust patient position and puncture angle during operation, thus saving time.

[0040] Regarding the excellent sample quality rate, the experimental group reached 96.4%, far exceeding the 82.4% of the control group. This indicates that the device of the present invention can improve the accuracy of puncture and sample quality, providing a more reliable basis for pathological diagnosis. This is mainly due to the split positioning ring 202 and rotating ring 203 design of the positioning structure, which can precisely adjust the puncture angle and position to ensure that the puncture needle accurately penetrates the target nodule. At the same time, the multi-level limiting design of the puncture fixation device 304 can precisely control the puncture depth, avoiding over-puncture or under-puncture.

[0041] The needle deviation rate is also a key indicator for measuring puncture accuracy. The needle deviation rate in the experimental group was 2.0%, significantly lower than the 8.0% in the control group. This further demonstrates the advantages of the device of this invention in improving puncture accuracy. The stability of the support structure, the accuracy of the positioning structure, and the reliability of the fixing structure work together to effectively reduce needle deviation during puncture.

[0042] Regarding patient comfort scores, the experimental group scored an average of 9.28 points, significantly higher than the control group's 7.5 points. This indicates that the device of the present invention can improve patient comfort and reduce discomfort during the puncture process. The arc-shaped hand fixation clip 305 and the return spring 306 design of the hand fixation device 302 can gently fix the patient's hand, avoiding discomfort caused by excessive restraint. At the same time, the limiting design of the puncture fixation device 304 reduces the shaking of the puncture needle, thus reducing patient pain.

[0043] Regarding the satisfaction rating of medical staff, the experimental group scored an average of 9.5 points, while the control group scored only 7.62 points. This reflects the high level of recognition that the device of this invention has received from medical staff in actual operation. Its design is reasonable and its operation is convenient, which can effectively reduce the workload of medical staff and improve work efficiency.

[0044] In summary, the thyroid nodule biopsy auxiliary device of this invention has significant advantages in improving puncture efficiency, sample quality, puncture accuracy, patient comfort, and medical staff satisfaction. Compared with existing technologies, the device of this invention, through the organic combination of support structure, positioning structure, and fixation structure, solves the problems of insufficient stability, limited positioning accuracy, and cumbersome operation in traditional puncture biopsy methods, providing strong support for the accurate diagnosis of thyroid nodules and possessing significant innovation and clinical application value.

[0045] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A device for assisting in thyroid nodule fine-needle aspiration biopsy, characterized in that: It includes a support structure (1), a positioning structure (2), and a fixing structure (3); The support structure (1) includes a support foot (101), a support leg (102) is installed on the support foot (101), and a fixing block (103) is provided on the top of the support leg (102). The support structure (1) is symmetrically arranged. The positioning structure (2) includes a rotating shaft (201), a positioning ring (202) is installed on the rotating shaft (201), a rotating ring (203) is provided inside the positioning ring (202), and a fixing structure (3) is installed on the rotating ring (203); The fixing structure (3) includes a hinge (301), a hand fixing device (302) is installed on the hinge (301), a screw (303) is inserted inside the hinge, and a piercing fixing device (304) is provided at the end of the screw (303).

2. The auxiliary device for thyroid nodule fine-needle aspiration biopsy according to claim 1, characterized in that: A support foot (104) is installed on the support foot (101), and a support leg (102) is fixedly connected to the support foot (101). The support leg (102) is a telescopic and adjustable support leg.

3. The auxiliary device for thyroid nodule fine-needle aspiration biopsy according to claim 2, characterized in that: The support leg (102) is height-adjustable by pneumatic means and is connected to an external air pump.

4. The auxiliary device for thyroid nodule fine-needle aspiration biopsy according to claim 1, characterized in that: The rotating shaft (201) is fixedly installed inside the fixed block (103). The two rotating shafts (201) are arranged opposite each other. The positioning ring (202) is annular and is a split positioning ring (202). The split part of the positioning ring (202) is provided with a groove to rotate and connect with the rotating shaft (201). The inner side of the split positioning ring (202) is provided with a groove (204). The rotating ring (203) and the groove (204) are connected in cooperation. A rubber pad (205) is installed on the inner ring of the rotating ring (203).

5. The auxiliary device for thyroid nodule fine-needle aspiration biopsy according to claim 1, characterized in that: The hinges (301) are symmetrically distributed and fixedly connected to the rotating ring (203). A hand fixing clip (305) is installed on the hinge (301). The hand fixing clip (305) is arc-shaped. A return spring (306) is provided on the outside of the hand fixing clip (305). One end of the return spring (306) is fixed on the hand fixing clip (305), and the other end is fixed on the return plate (307).

6. The auxiliary device for thyroid nodule fine-needle aspiration biopsy according to claim 5, characterized in that: The hand fixing clips (305) are symmetrically distributed in a semi-circular shape, and the ends of the hand fixing clips (305) on both sides that are away from the one connected to the rotating ring (203) are in contact with each other and aligned.

7. The auxiliary device for thyroid nodule fine-needle aspiration biopsy according to claim 5, characterized in that: The reset plate (307) is fixed on the rotating ring (203). The reset plates (307) are symmetrically distributed and distributed in the same semicircle. The reset plate (307) is provided with a spring mounting groove (308).

8. The auxiliary device for thyroid nodule fine-needle aspiration biopsy according to claim 5, characterized in that: The hinge (301) is a three-section hinge. Each of the three sections of the hinge (301) has a through hole at its center. The through holes of the two end hinges (301) are threaded holes, and the through hole of the middle section is a smooth hole. The diameter of the smooth hole is larger than that of the threaded hole.

9. The auxiliary device for thyroid nodule fine-needle aspiration biopsy according to claim 1, characterized in that: The puncture fixation device (304) includes a fixing plate (309). The two ends of the fixing plate (309) are sleeved on the screws (303) on both sides through holes. The fixing plate (309) has a puncture needle limiting hole (310) at the center. The puncture needle limiting cylinder (311) is provided on the outer edge of the puncture needle limiting hole (310). The end of the puncture needle limiting cylinder (311) has a needle limiting hole (312).

10. The auxiliary device for thyroid nodule fine-needle aspiration biopsy according to claim 9, characterized in that: An adjusting nut (313) is provided on the side of the fixing plate (309) away from the hand fixing device (302). The adjusting nut (313) is symmetrically installed at the end of the screw (303), and the other end of the screw (303) is also provided with an adjusting nut (313).

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