A tumor biopsy needle positioning device

Abstract

This invention belongs to the field of medical device technology and discloses a tumor puncture biopsy positioning device, including a base, a suction cup connected to the base, two mutually perpendicular connecting arms, a lead screw connected to each connecting arm, a groove formed in the connecting arm, a slider connected to the lead screw via a thread, a telescopic component connected to the slider, and a puncture control component connected to the telescopic component. The puncture control component includes an outer housing, a guide cylinder connected to the outer housing, and a pair of speed control components. The speed control component includes a rotating shaft and an inner housing, the rotating shaft connected to a conical cylinder and a rotating wheel, the rotating wheel being located inside the inner housing, and the inner housing containing a shear-thickening fluid. This invention utilizes the suction cup to fix the entire positioning device, resulting in good fixation and precise positioning; the puncture control component controls the puncture of the puncture device, reducing the risk of damage to normal tissue surrounding the lesion and reducing the sharp pain experienced by the patient during the puncture.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a tumor biopsy localization device. Background Technology

[0002] Cancer, especially gastrointestinal cancers such as gastric cancer, colorectal cancer, and esophageal cancer, is one of the most prevalent malignant diseases worldwide, with consistently high morbidity and mortality rates. Early and accurate pathological diagnosis of suspicious lesions is crucial for developing effective treatment plans. Against this backdrop, biopsy has become the "gold standard" for obtaining lesion tissue and clarifying its pathological nature. This technique obtains a small tissue sample through a needle for subsequent pathological analysis, which is of great significance for tumor characterization, subtyping, and genetic testing.

[0003] However, existing tumor biopsy techniques still have some problems in localization and puncture procedures, affecting the success rate, accuracy, and patient comfort of the surgery. These mainly include:

[0004] 1) Existing positioning devices have poor fixation effect and poor positioning accuracy.

[0005] Existing positioning devices are mostly puncture frames, which are often fixed to the endoscope tip using simple clips or friction. This simple fixation method is prone to displacement or loosening, causing deviations from the preset puncture path. Poor positioning accuracy is a direct consequence of inadequate fixation: when the puncture needle enters the tissue, if its actual trajectory deviates from the preset trajectory, the needle may fail to hit the target lesion, resulting in sampling failure and requiring repeated punctures. This not only prolongs the operation time but also increases the risk of tissue damage and complications (such as bleeding and perforation). Furthermore, if the needle tip only brushes past the edge of the lesion, the amount of tissue obtained is insufficient or unrepresentative, leading to false negative diagnoses and potentially delaying the optimal treatment time.

[0006] 2) Lack of effective control over puncture speed and uniformity exacerbates patient suffering.

[0007] Currently, during puncture, doctors mostly rely on their personal feel and experience to control the speed of needle insertion. This mode, which depends entirely on manual operation, has inherent limitations. Uneven puncture speed can affect the stress on the tissue. When the needle is inserted too quickly, it can tear tissue fibers instantly with high impact force, causing unnecessary damage to normal tissue around the lesion and potentially stimulating pain nerve endings, triggering sharp pain.

[0008] Shear-thickening fluid (STF) is a novel material. Under normal or low shear rates, STF exhibits low viscosity and low flow resistance. However, upon encountering high-speed impact or shear, its viscosity rapidly increases by several orders of magnitude, resulting in a sharp increase in damping force, transforming it into a near-solid state that significantly restricts or even blocks flow. When the external force disappears, it reversibly returns to its initial low viscosity state. This unique "strength increases with strength" rheological property can be used to control the insertion speed of puncture needles, effectively preventing excessively fast needle insertion during puncture. Summary of the Invention

[0009] This invention aims to provide a tumor biopsy positioning device that utilizes a suction cup to fix the entire device, ensuring precise positioning and good fixation. A puncture control component controls the puncture of the device, reducing the risk of damage to surrounding normal tissue and minimizing sharp pain for the patient during the procedure. This addresses the problems in the prior art.

[0010] To achieve the above objectives, the present invention provides the following technical solution:

[0011] A tumor biopsy positioning device includes a base with several suction cups for fixing the positioning device connected to the lower side of the base. A puncture control assembly is connected to the base to control the puncture of a puncture device. The puncture control assembly includes an outer housing connected to the base, and a pair of speed control components connected to the inner side of the outer housing. Each speed control component includes a rotating shaft and an inner housing. The rotating shaft is rotatably connected to the outer housing and the inner housing. A conical cylinder and a rotating wheel are drivenly connected to the rotating shaft. The rotating wheel is located inside the inner housing, and the inner housing contains a shear-thickening fluid. During puncture, the outer wall of the puncture device simultaneously abuts against the outer wall of the conical cylinder of the pair of speed control components, and the puncture device drives the pair of conical cylinders to rotate during insertion.

[0012] Furthermore, the rotating shaft slides through the side walls of the outer and inner housings, the conical cylinder is fixedly connected to the rotating shaft, and the rotating wheel is connected to the rotating shaft via a spline drive; the conical inclined surfaces of the two conical cylinders of the speed control assembly are arranged opposite each other, and a spring is connected to the end face of the conical cylinder, with the end of the spring away from the conical cylinder connected to the inner side wall of the outer housing.

[0013] Furthermore, the spring is sleeved on the outside of the rotating shaft, and the spring is connected to the end face of the large end of the conical cylinder, while the inner box and the rotating wheel are located on the outside of the small end of the conical cylinder.

[0014] Furthermore, the shear thickening fluid contained inside the inner box is a suspension-type shear thickening fluid, and the particles of the suspension-type shear thickening fluid are SiO2 and the carrier fluid is PEG.

[0015] Furthermore, a guide cylinder is connected to the upper side of the outer casing, and the guide cylinder is a cone shape that is larger at the top and smaller at the bottom.

[0016] Furthermore, the base includes two mutually perpendicular connecting arms, each of which is rotatably connected to a lead screw, and each of the two connecting arms is also provided with a sliding groove. The lead screw is threadedly connected to a slider, which slides through the sliding groove. When the lead screw is rotated, the slider moves linearly along the axis of the lead screw. The ends of the two sliders away from the sliding grooves are connected to telescopic components, and the telescopic ends of the two telescopic components are respectively connected to two mutually perpendicular sides of the outer casing.

[0017] Furthermore, the telescopic component is a telescopic cylinder.

[0018] Furthermore, there are three suction cups arranged in a triangle, and each of the three suction cups is connected to the end face of one of the two connecting arms and the intersecting surface of the two connecting arms.

[0019] Furthermore, the outer casing is also connected to a depth control assembly, which includes a control housing connected to the outer side wall of the outer casing. The control housing is connected to a control shaft and a spring assembly, and the spring body of the spring assembly is wound on the control shaft. The control shaft is rotatably connected to the control housing, and a drive gear is fixedly connected to the control shaft. The rotating shaft of any of the speed control components is fixedly connected to a driven gear that meshes with the drive gear.

[0020] Furthermore, the lead screw is fixedly connected to a first knob located on the outside of the connecting arm, and the control shaft is fixedly connected to a second knob located on the outside of the control box.

[0021] The principles and beneficial effects of the technical solution are as follows:

[0022] 1. This invention provides a tumor biopsy positioning device. A suction cup is connected to the lower side of a base, adhering to a reference surface (the patient's body surface or various tabletops, etc.), fixing the entire positioning device around the puncture point. This provides precise puncture positioning and good fixation. The base is connected to a puncture control assembly, the outer casing of which is connected to a pair of speed control components. Each speed control component includes a rotating shaft and an inner casing. The rotating shaft connects to a conical cylinder and a rotating wheel, which is located inside the inner casing, which contains a shear-thickening fluid. During puncture, the outer wall of the puncture device abuts against the outer wall of the conical cylinder, causing the conical cylinder to rotate as the puncture device penetrates deeper into the patient's body. The rotating wheel, under the action of the rotating shaft... As the device rotates, the rotating wheel shears the shear-thickening fluid inside the inner chamber. When the puncture device penetrates too quickly, the shearing speed of the rotating wheel on the shear-thickening fluid increases rapidly, causing the viscosity of the fluid to rise quickly. This leads to a sharp increase in the rotational damping force of the rotating wheel, which greatly restricts or even prevents the rotation of the rotating wheel / conical cylinder. Consequently, it limits or prevents the puncture device from penetrating further, thus controlling the puncture speed and reducing the risk of damage to surrounding normal tissues, as well as reducing the sharp pain experienced by the patient during the puncture. Conversely, as the puncture speed decreases, the viscosity of the shear-thickening fluid gradually decreases, reducing the damping force of the rotating wheel / conical cylinder and ensuring that the puncture device can penetrate the patient's body normally.

[0023] 2. The present invention provides a tumor puncture biopsy positioning device, wherein a rotating shaft is slidably inserted through the side walls of the outer and inner housings, a conical cylinder is fixedly connected to the rotating shaft, and a rotating wheel is connected to the rotating shaft via a spline drive; the two conical cylinders of a pair of speed control components are arranged with their conical inclined surfaces facing each other, and a spring is connected to the end face of the conical cylinder, with the end of the spring away from the conical cylinder connected to the inner side wall of the outer housing; the conical cylinder is compressed along the axial direction of the rotating shaft, causing the spring to be compressed, and the effective space between the two conical cylinders is changed, so that it can accommodate puncture needles of different types (diameters and shapes), ensuring that puncture needles of different types (diameters and shapes) can form an effective interaction relationship with the conical cylinder, thereby ensuring its functionality; and when rapid puncture is required in specific situations, the contact between the side wall of the puncture device and the side wall of the conical cylinder is allowed to "slip", thereby ensuring the continuation of the puncture, further expanding the applicability of the entire device. The spring is sleeved on the outside of the rotating shaft, which can effectively ensure the straightness of the spring when it is compressed and deformed; the spring is connected to the end face of the large end of the conical cylinder, and the inner box and the rotating wheel are located on the outside of the small end of the conical cylinder, so that the distribution of each component of the whole device is uniform and its mechanical balance is improved; effectively ensuring the stability and functionality of the whole device during use.

[0024] 3. This invention provides a tumor biopsy localization device. The inner chamber contains a shear-thickening fluid of the suspension type. The particles of the suspension type shear-thickening fluid are SiO2, and the carrier fluid is PEG. The silica (SiO2) / polyethylene glycol (PEG) system is the most classic and well-studied suspension type shear-thickening fluid. By controlling the molecular weight of PEG (e.g., PEG200, PEG400) and the concentration, shape (spherical, gas phase method), and particle size (typically 100-500 nanometers) of SiO2 particles, the thickening performance can be controlled. For example, by changing the concentration of SiO2, the critical shear rate at which shear thickening occurs can be precisely set, thereby matching the required safe puncture speed.

[0025] 4. The present invention provides a tumor puncture biopsy positioning device, the base of which includes two mutually perpendicular connecting arms, both of which are rotatably connected to lead screws, and each of the two connecting arms has a sliding groove, the lead screws connecting to sliders; after the suction cup fixes the base, the two mutually perpendicular connecting arms are equivalent to the X-axis and Y-axis in a horizontal plane, and by rotating the lead screws of the two connecting arms, the corresponding sliders move along the axial direction; each of the two sliders has a telescopic component connected to the end away from the sliding groove, and the telescopic ends of the two telescopic components are respectively connected to two mutually perpendicular sides of the outer casing; during the movement of the two sliders along the axial direction of the lead screws, the outer casing is driven to move, so that its coordinate (x,y) position in the XY plane formed by the two connecting arms is accurate, which can further improve the accuracy of puncture positioning. The telescopic component is a telescopic cylinder, which has a simple structure and reliable function. It is equipped with three suction cups, and the three suction cups are connected to the end faces of the two connecting arms and the intersection surfaces of the two connecting arms to form a triangle, which further improves the fixing effect of the entire positioning device. The upper side of the outer box is connected to a cone-shaped guide cylinder that is larger at the top and smaller at the bottom, which guides and limits the insertion of the puncture device, improving the convenience of operation.

[0026] 5. The tumor biopsy positioning device provided by this invention, in conjunction with the above analysis, indicates that during the puncture process, the puncture device drives the rotating shaft to rotate. Conversely, when the rotating shaft cannot rotate, the puncture device is also restricted and cannot continue to penetrate, that is, the puncture depth is related to the number of rotations of the rotating shaft. Based on this, a depth control component is connected to the outer casing. The depth control component includes a control housing connected to the outer wall of the outer casing. The control housing is connected to a control shaft and a spring assembly. The spring body of the spring assembly is wound on the control shaft. The control shaft is fixedly connected to a drive gear. The rotating shaft of any speed control component is fixedly connected to a driven gear that meshes with the drive gear. Rotating the control shaft winds the spring. When the mainspring is in operation, it stores potential energy. When the force on the control shaft is released, the mainspring releases this potential energy. During the actual puncture depth, the control shaft is rotated to store potential energy in the mainspring. The number of turns of the mainspring is controlled to set the number of turns of the control shaft / rotating shaft (the rotation of the rotating shaft is consistent with the rotation of the control shaft under the action of the driven gear and the driving gear), thus setting the puncture depth to avoid over-puncture. Furthermore, during the release of potential energy, the mainspring actively drives the control shaft / rotating shaft to rotate, thereby pushing the puncture device deeper, providing assistance for the puncture operation and effectively reducing the workload of medical personnel. A first knob is connected to the lead screw, and a second knob is connected to the control shaft. These knobs effectively improve the operation of the lead screw / control shaft, further enhancing the convenience of operation. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of a tumor biopsy localization device in Embodiment 1 of the present invention;

[0028] Figure 2 This is a front view of a tumor biopsy localization device according to Embodiment 1 of the present invention;

[0029] Figure 3 for Figure 2 Sectional view of AA;

[0030] Figure 4 for Figure 3 A magnified view of a portion of point B in the middle;

[0031] Figure 5 This is a schematic diagram of a tumor puncture biopsy localization device in Embodiment 2 of the present invention;

[0032] Figure 6 This is a front view of a tumor biopsy localization device according to Embodiment 2 of the present invention;

[0033] Figure 7 for Figure 6 Sectional view of CC;

[0034] Figure 8 for Figure 7 A magnified view of a portion of point D.

[0035] The names of the corresponding labels in the attached diagram are:

[0036] 1. Base, 2. Suction cup, 3. Telescopic component, 4. Puncture control assembly, 5. Puncture device, 6. Slide groove, 7. Lead screw, 8. Slider, 9. First knob, 10. Outer housing, 11. Rotating shaft, 12. Conical cylinder, 13. Spring, 14. Inner housing, 15. Rotating wheel, 16. Guide cylinder, 17. Control housing, 18. Control shaft, 19. Spring assembly, 20. Driven gear, 21. Driven gear. Detailed Implementation

[0037] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments:

[0038] Example 1: As Figures 1 to 4 As shown, a tumor biopsy positioning device includes a base 1, which includes two mutually perpendicular connecting arms. The base 1 is also connected to three suction cups 2, which are respectively connected to the end faces of the two connecting arms and the intersection surfaces of the two connecting arms, forming a triangle. Each connecting arm is rotatably connected to a lead screw 7, and the lead screw 7 is fixedly connected to a first knob 9 located on the outside of the connecting arm. Each connecting arm is also provided with a sliding groove 6. The lead screw 7 is threadedly connected to a slider 8, which slides through the sliding groove 6. When the lead screw 7 is rotated, the slider 8 moves linearly along the axial direction of the lead screw 7. The ends of the two sliders 8 away from the sliding groove 6 are connected to telescopic components 3, and the telescopic ends of the two telescopic components 3 are connected to a puncture control component 4 for controlling the puncture of the puncture device 5.

[0039] The puncture control assembly 4 includes an outer housing 10. The telescopic ends of two telescopic components 3 are connected to the rear and left sides of the outer housing 10, respectively. A guide cylinder 16 for guiding the puncture device 5 is connected to the upper side of the outer housing 10. The guide cylinder 16 is a cone shape with a larger upper part and a smaller lower part. A pair of speed control assemblies are connected to the inner side of the outer housing 10. The speed control assembly includes a rotating shaft 11 and an inner housing 14. The rotating shaft 11 is rotatably connected to the outer housing 10 and the inner housing 14. The rotating shaft 11 is driven to connect a conical cylinder 12 and a rotating wheel 15. The rotating wheel 15 is located inside the inner housing 14, and the inner housing 14 contains a shear-thickening fluid. When the puncture device 5 punctures, the outer wall of the puncture device 5 simultaneously abuts against the outer wall of the conical cylinder 12 of the pair of speed control assemblies. During the penetration process, the puncture device 5 drives the pair of conical cylinders 12 to rotate.

[0040] The rotating shaft 11 slides through the side walls of the outer housing 10 and the inner housing 14. The conical cylinder 12 is fixedly connected to the rotating shaft 11, and the rotating wheel 15 is connected to the rotating shaft 11 via a spline drive. The two conical cylinders 12 of the speed control assembly have their conical inclined surfaces facing each other, and the end face of the conical cylinder 12 is connected to a spring 13. The end of the spring 13 away from the conical cylinder 12 is connected to the inner side wall of the outer housing 10. The spring 13 is sleeved on the outside of the rotating shaft 11, and the spring 13 is connected to the end face of the large end of the conical cylinder 12. The inner housing 14 and the rotating wheel 15 are located on the outside of the small end of the conical cylinder 12.

[0041] In addition, in this embodiment, the telescopic component 3 is a telescopic cylinder, the fixed end of the telescopic cylinder is connected to the slider 8, and the telescopic end of the telescopic cylinder 3 is connected to the outer casing 10; the shear thickening fluid contained inside the inner casing 14 is a suspension-type shear thickening fluid, and the particles of the suspension-type shear thickening fluid are SiO2 and the carrier liquid is PEG.

[0042] The specific implementation process is as follows:

[0043] When using this positioning device, according to the needs of clinical puncture biopsy, first use the suction cup 2 to fix the entire positioning device on the reference plane (patient's body surface or various tabletops, etc.) around the puncture point; then turn the first knob 9 connected to the two connecting arms to adjust the position of the puncture control component 4 until the central axis of the guide cylinder 16 coincides with the puncture point in the vertical direction, which can ensure that the puncture point of the puncture device 5 coincides with the preset puncture point; finally, pass the puncture end of the puncture device 5 through the guide cylinder 16 between a pair of speed control components, and continue to advance the puncture device 5 evenly and slowly until the puncture biopsy requirement is completed.

[0044] The three suction cups 2 are connected to the end faces of the two connecting arms and the intersecting surfaces of the two connecting arms to form a triangle, improving the fixation effect of the entire positioning device. The base 1 includes two mutually perpendicular connecting arms, which correspond to the X and Y axes in a horizontal plane. By rotating the first knob 9 of the two connecting arms, the outer box 10 is positioned precisely in the XY plane formed by the two connecting arms, improving the accuracy of puncture positioning. The telescopic component 3 is a telescopic cylinder, which has a simple structure and reliable function.

[0045] The tapered guide cylinder 16, wider at the top and narrower at the bottom, guides and limits the insertion of the puncture device 5, improving operational convenience. During puncture, the outer wall of the puncture device 5 abuts against the outer wall of the tapered cylinder 12, causing the tapered cylinder 12 to rotate as the puncture device 5 penetrates deeper into the patient's body. The rotating wheel 15 rotates accordingly under the action of the rotating shaft 11. The rotation of the rotating wheel 15 shears the shear-thickening fluid inside the inner box 14. When the puncture device 5 penetrates too quickly, the shearing speed of the rotating wheel 15 on the shear-thickening fluid increases, thus shearing the thickened fluid... The viscosity of the fluid increases rapidly, and the rotational damping force of the rotating wheel 15 increases sharply, thereby greatly limiting or even preventing the rotation of the rotating wheel 15 / conical cylinder 12. This, in turn, limits or prevents the puncture device 5 from continuing to penetrate deeper, thus controlling the puncture speed, reducing the risk of damage to the normal tissue around the lesion caused by the puncture device 5, and reducing the sharp pain experienced by the patient during the puncture. As the puncture speed decreases, the viscosity of the shear-thickened fluid gradually decreases, reducing the damping force of the rotating wheel 15 / conical cylinder 12 during rotation, ensuring that the puncture device 5 can penetrate the patient's body normally. In this device, the two conical cylinders 12 of the speed control assembly are arranged opposite each other with their conical inclined surfaces facing each other, and the end face of the conical cylinder 12 is connected to a spring 13. The end of the spring 13 away from the conical cylinder 12 is connected to the inner side wall of the outer casing 10. The conical cylinder 12 is compressed along the axial direction of the rotating shaft 11, which compresses the spring 13 and changes the effective space between the two conical cylinders 12, so that it can accommodate puncture needles of different types (diameters and shapes). This ensures that puncture needles of different types (diameters and shapes) can form an effective interaction relationship with the conical cylinder 12, thereby ensuring its functionality. In addition, when rapid puncture is required in a specific situation, the contact between the side wall of the puncture device 5 and the side wall of the conical cylinder 12 is allowed to "slip", thereby ensuring the continuation of puncture and expanding the applicability of the entire device.

[0046] Example 2: Figures 5 to 8As shown, the difference between this embodiment and Embodiment 1 is that a depth control assembly is also connected to the outer right side of the outer housing 10. The depth control assembly includes a control housing 17 connected to the outer wall of the outer housing 10. The control housing 17 is connected to a control shaft 18 and a spring assembly 19. The spring body of the spring assembly 19 is wound on the control shaft 18. The control shaft 18 is rotatably connected to the control housing 17. The control shaft 18 is fixedly connected to a drive gear 20. The rotating shaft 11 of the speed control assembly on the front side is fixedly connected to a driven gear 21 that meshes with the drive gear 20. The control shaft 18 is fixedly connected to a second knob located on the outside of the control housing 17. In the specific use of the positioning device of this embodiment, the second knob is first rotated to store potential energy in the mainspring body. The number of turns of the mainspring body is controlled to set the number of rotations of the control shaft 18 / rotating shaft 11 (the rotation of the rotating shaft 11 is consistent with the rotation of the control shaft 18 under the action of the driven gear 21 and the driving gear 20), thereby setting the puncture depth to avoid over-puncture. During the release of potential energy, the mainspring body actively drives the control shaft 18 / rotating shaft 11 to rotate, thereby pushing the puncture device 5 deeper and "assisting" the puncture operation of the puncture device 5, which can effectively reduce the labor intensity of medical staff. The remaining structure, shape, connection method, usage method and the resulting technical effects are the same as in Embodiment 1, and will not be repeated in this embodiment.

[0047] The above descriptions are merely embodiments of the present invention, and common knowledge regarding specific technical solutions or characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solutions of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A tumor biopsy positioning device, comprising a base, wherein a plurality of suction cups for fixing the positioning device are connected to the lower side of the base, and a puncture control assembly is connected to the base, the puncture control assembly being used to control the puncture of the puncture device; characterized in that, The puncture control assembly includes an outer housing connected to the base. A pair of speed control assemblies are connected to the inner side of the outer housing. Each speed control assembly includes a rotating shaft and an inner housing. The rotating shaft is rotatably connected to the outer housing and the inner housing. A conical cylinder and a rotating wheel are drivenly connected to the rotating shaft. The rotating wheel is located inside the inner housing, and the inner housing contains a shear-thickening fluid. When the puncture device punctures, the outer wall of the puncture device simultaneously abuts against the outer wall of the conical cylinder of the pair of speed control assemblies. During the penetration process, the puncture device drives the pair of conical cylinders to rotate.

2. The tumor biopsy localization device according to claim 1, characterized in that, The rotating shaft slides through the side walls of the outer and inner housings. The conical cylinder is fixedly connected to the rotating shaft, and the rotating wheel is connected to the rotating shaft via a spline drive. The conical inclined surfaces of the two conical cylinders of the speed control assembly are arranged opposite each other, and a spring is connected to the end face of the conical cylinder. The end of the spring away from the conical cylinder is connected to the inner side wall of the outer housing.

3. The tumor biopsy localization device according to claim 2, characterized in that, The spring is sleeved on the outside of the rotating shaft, and the spring is connected to the end face of the large end of the conical cylinder. The inner box and the rotating wheel are located on the outside of the small end of the conical cylinder.

4. The tumor biopsy localization device according to claim 1, characterized in that, The shear-thickening fluid contained inside the inner box is a suspension-type shear-thickening fluid, and the particles of the suspension-type shear-thickening fluid are SiO2 and the carrier fluid is PEG.

5. The tumor biopsy localization device according to claim 1, characterized in that, The upper side of the outer casing is connected to a guide cylinder, which is a cone shape that is larger at the top and smaller at the bottom.

6. The tumor biopsy localization device according to claim 1, characterized in that, The base includes two mutually perpendicular connecting arms, each of which is rotatably connected to a lead screw, and each of the two connecting arms is also provided with a sliding groove. The lead screw is threadedly connected to a slider, which slides through the sliding groove. When the lead screw is rotated, the slider moves linearly along the axis of the lead screw. The ends of the two sliders away from the sliding grooves are connected to telescopic components, and the telescopic ends of the two telescopic components are respectively connected to two mutually perpendicular sides of the outer casing.

7. The tumor biopsy localization device according to claim 6, characterized in that, The telescopic component is a telescopic cylinder.

8. A tumor biopsy localization device according to claim 6, characterized in that, There are three suction cups arranged in a triangle, and each suction cup is connected to the end face of one of the two connecting arms and the intersecting surface of the two connecting arms.

9. A tumor biopsy localization device according to claim 6, characterized in that, The outer housing is also connected to a depth control assembly. The depth control assembly includes a control housing connected to the outer side wall of the outer housing. The control housing is connected to a control shaft and a spring assembly. The spring body of the spring assembly is wound on the control shaft. The control shaft is rotatably connected to the control housing. The control shaft is fixedly connected to a drive gear. The rotating shaft of any of the speed control components is fixedly connected to a driven gear that meshes with the drive gear.

10. A tumor biopsy localization device according to claim 9, characterized in that, The lead screw is fixedly connected to a first knob located on the outside of the connecting arm, and the control shaft is fixedly connected to a second knob located on the outside of the control box.

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