Tumor needle biopsy positioning device and positioning method

Abstract

The invention relates to the technical field of needle biopsy, and discloses a tumor needle biopsy positioning device which comprises a shell, a negative pressure assembly is arranged at the bottom of the shell, a plurality of supporting rods are fixedly connected to the upper surface of the shell, an annular sliding rail is fixedly connected between the top ends of the supporting rods, two sliding blocks are movably connected to the outer side of the annular sliding rail, and the two sliding blocks are fixedly connected to the outer side of the shell. The invention further provides a tumor needle biopsy positioning method which comprises the following steps that a patient lies flat, the whole device is placed on the skin on the outer side of the position needing to be examined, and then the device is placed on the outer side of the position needing to be examined; according to the device, the position of the puncture needle stretching into the skin detection part of a patient with the required depth can be limited, the position of the puncture needle can be more accurately adjusted, and the position of the puncture needle located at the bottom of the positioning cylinder can be subjected to auxiliary positioning through the positioning clamping assembly.

Description

Technical Field

[0001] The present invention relates to the technical field of puncture biopsy, and in particular to a tumor puncture biopsy positioning device and positioning method. Background Art

[0002] A puncture biopsy of a tumor is an invasive examination used to determine the nature of a tumor. A puncture biopsy positioning is a commonly used method for examining or treating it, and its main purpose is to facilitate finding the exact location.

[0003] After searching, the Chinese patent with publication number CN221577980U discloses a lung puncture biopsy positioning device, which includes a circular base with a semicircular seat fixedly installed on the top surface of the circular base, which facilitates the puncture needle to perform puncture biopsy operations at different angles. The device is convenient for fixing puncture needles of different models and sizes, saving time and effort while improving efficiency.

[0004] However, there are still the following defects:

[0005] 1. It lacks a depth-limiting mechanism, which may not only cause the puncture depth to exceed the predetermined range, but may also affect the accuracy of the diagnostic results due to improper puncture depth.

[0006] 2. The positioning cylinder in this device can only locate a large area of ​​the lesion and cannot accurately locate the needle insertion site. Summary of the Invention

[0007] (1) Technical problems solved

[0008] In response to the shortcomings of the existing technology, the present invention provides a tumor puncture biopsy positioning device and positioning method, which mainly solves the problem of lack of a depth limiting mechanism, which may not only cause the puncture depth to exceed the predetermined range, but also affect the accuracy of the diagnostic results due to improper puncture depth. The positioning cylinder in the device can only locate a large area of ​​the lesion and cannot accurately locate the needle insertion point.

[0009] (2) Technical solution

[0010] To achieve the above object, the present invention provides the following technical solutions:

[0011] A tumor puncture biopsy positioning device includes a shell, a negative pressure component is provided at the bottom of the shell, a plurality of support rods are fixedly connected to the upper surface of the shell, an annular slide rail is fixedly connected between the top ends of the plurality of support rods, two sliders are movably connected to the outer side of the annular slide rail, the upper surfaces of the two sliders are fixedly connected to a protrusion, the top of the protrusion is installed with a slide rod through a connecting assembly, the connecting assembly includes a corrugated groove, the corrugated groove is opened at the top of the protrusion, the outer side of the slide rod is opened with a plurality of limiting grooves, and the convex portion on the corrugated groove is clamped in the groove portion at the corresponding position on the limiting groove and is slidably connected to the groove portion on the limiting groove, the upper surface of the slider is provided with a locking assembly for limiting the position of the slide rod, a positioning cylinder is installed on the slide rod, the top of the positioning cylinder is fixedly connected to the limiting assembly, the limiting assembly includes two first positioning columns, the two first positioning columns are both fixed to the top end of the positioning cylinder by bolts, a baffle is provided on the outer side between the two first positioning columns, a through hole is opened on the baffle, the baffle and the two first positioning columns are fixed by a clamping assembly, and a positioning clamping assembly is provided at the bottom of the positioning cylinder.

[0012] Furthermore, the negative pressure assembly includes an annular piston block, which is slidably connected to the inside of the shell. The top of the shell is movably connected to a second threaded rod, and the second threaded rod passes through the top of the shell and is rotatably connected to the annular piston block.

[0013] Based on the above scheme, the locking assembly includes a first threaded rod, which is rotatably connected to the top of the slider, and the outer side of the first threaded rod is movably connected with a first pressure frame and a second pressure frame, and the first pressure frame is in contact with the top of the slide rod, and the second pressure frame is in contact with the upper surface of the annular slide rail, and the upper surface of the slider is fixedly connected to two first guide rods, and the first pressure frame and the second pressure frame slide along the two first guide rods.

[0014] As a further solution of the present invention, the locking assembly includes multiple card slots, and the multiple card slots are opened on one side of the first positioning column. Two telescopic rods are fixedly connected to one side of the baffle, and a card block is fixedly connected between the extended ends of the two telescopic rods, and the two sides of the card block are respectively engaged with the card slots at corresponding positions. A first spring is sleeved on the outer side of the telescopic rod, and the two ends of the first spring are respectively fixed to the baffle and the card block.

[0015] Furthermore, the positioning clamping assembly includes a fixing plate, which is fixed to the outer side of the positioning cylinder by bolts, and a screw rod is movably connected to one side of the fixing plate, and a slide is movably connected to the outer side of the positioning cylinder, and the screw rod is threadedly connected to the slide, and a second positioning column is movably connected to the other side of the fixing plate, and the bottom end of the second positioning column is fixed to the slide, and the bottom of the slide is provided with an inclined surface, and a plurality of push rods are movably connected to the outer side of the positioning cylinder, and the top of the push rod is in contact with the inclined surface, and a ball bearing is rotatably installed on one end of the push rod extending into the positioning cylinder, and a second spring is fixedly connected to one side of the push rod, and the second spring is fixed to the positioning cylinder.

[0016] Based on the above solution, an anti-slip pad is fixedly connected to the bottom of the second pressing frame.

[0017] As a further solution of the present invention, a second guide rod is fixedly connected to the upper surface of the annular piston block, and the housing is slidably connected to the second guide rod.

[0018] Furthermore, an annular rubber pad is fixedly connected to the bottom of the shell.

[0019] The present invention also proposes a positioning method for tumor puncture biopsy, comprising the following steps: the patient lies flat, places the entire device on the skin outside the position to be examined, and makes the annular rubber pad contact the patient's skin, rotates the second threaded rod to drive the annular piston block to move upward along the shell, thereby generating negative pressure in the bottom space of the shell, so that the device is sucked onto the patient's skin; rotates the first threaded rod to drive the first pressing frame and the second pressing frame to move toward the middle along the first guide rod respectively, so that the first pressing frame is separated from the slide rod, and the second pressing frame is separated from the annular slide rail, and then pushes the slider to move to the required position along the annular slide rail along the sliding rod that drives the bottom, moves the slide rod horizontally, so that it drives the position of the positioning cylinder to change to the required position, and then reverses the first threaded rod to reset the first pressing frame and the second pressing frame to re-press and contact the slide rod and the annular slide rail, thereby fixing the position of the slider and the position of the slide rod; then When the lancet is pushed out of the locking groove, the first spring is extended, and the baffle is freed from restriction. The staff member moves the baffle downward, and the relative position of the first positioning post and the baffle is changed until the baffle drives the lancet to move out of the positioning cylinder to the required length. The staff member can judge the distance the lancet has descended according to the interval of the slot, and then reinsert the baffle into the slot at the corresponding position to fix it, and then rotate the screw rod to drive the slide downward along the second positioning post, thereby causing the push rod to move inward along the positioning cylinder on the inclined surface until the ball contacts the lancet in the positioning cylinder, so that the lancet is further positioned.

[0020] (3) Beneficial effects

[0021] Compared with the prior art, the present invention provides a tumor puncture biopsy positioning device and positioning method, which has the following beneficial effects:

[0022] 1. The present invention adjusts and fixes the length of the pointed portion of the positioning cylinder from which the puncture needle extends by setting a limit assembly, thereby limiting the position of the puncture needle inserted into the patient's skin to a required depth for testing, thereby preventing the puncture depth from exceeding a predetermined range or being inappropriate, thereby affecting the accuracy of the diagnostic results and improving the use effect of the device.

[0023] 2. The present invention can not only use the slider and the annular slide rail in conjunction to enable the slide bar to drive the puncture needle to move around the annular slide rail, thereby adjusting the position of the puncture needle, but also can adjust the position of the slide bar on the protrusion through the setting of the locking assembly, thereby further adjusting the position of the puncture needle on the slide bar. It is more flexible to use and has a wider range of adjustment, thereby enabling the device to locate a smaller area of ​​the lesion and more accurately locate the needle insertion site.

[0024] 3. The present invention not only enables the device to absorb the patient's skin through negative pressure through the setting of the negative pressure component, thereby achieving positioning of the device with simple operation, but also can assist in positioning the position of the puncture needle at the bottom of the positioning cylinder through the positioning clamping component, thereby preventing it from moving over a large range during use.

[0025] 4. The present invention not only enables the slide bar to stably move horizontally along the protrusion through the setting of the connecting assembly, but also limits the position of the slide bar to prevent it from rotating, thereby improving the stability of the slide bar movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of the three-dimensional structure of a tumor puncture biopsy positioning device and positioning method proposed by the present invention;

[0027] Figure 2 This is a schematic structural diagram of a locking assembly of a tumor puncture biopsy positioning device and positioning method proposed by the present invention;

[0028] Figure 3 A partial cross-sectional structural diagram of a tumor puncture biopsy positioning device and positioning method proposed by the present invention;

[0029] Figure 4 This is a schematic diagram of the structure of the engaging components of a tumor puncture biopsy positioning device and positioning method proposed by the present invention;

[0030] Figure 5 This is a schematic diagram of the cross-sectional structure of a positioning cylinder of a tumor puncture biopsy positioning device and positioning method proposed by the present invention;

[0031] Figure 6 This is a schematic diagram of the shell cross-sectional structure of a tumor puncture biopsy positioning device and positioning method proposed by the present invention.

[0032] In the figure: 1. Locking assembly; 2. Negative pressure assembly; 3. Limiting assembly; 4. Clamping assembly; 5. Positioning and clamping assembly; 6. Annular slide rail; 7. Support rod; 8. Housing; 9. Slider; 10. Sliding rod; 11. Bump; 12. Limiting groove; 13. Positioning cylinder; 101. First pressing frame; 102. First guide rod; 103. Second pressing frame; 104. Anti-slip pad; 105. First threaded rod; 201. Second guide rod; 202, second threaded rod; 203, annular piston block; 204, annular rubber pad; 301, first positioning column; 302, baffle; 303, through hole; 401, slot; 402, block; 403, telescopic rod; 404, first spring; 501, fixing plate; 502, slide; 503, inclined plane; 504, screw rod; 505, push rod; 506, ball bearing; 507, second spring; 508, second positioning column. DETAILED DESCRIPTION

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] Reference Figures 1-6, a tumor puncture biopsy positioning device and positioning method, including a shell 8, an annular rubber pad 204 is bonded to the bottom of the shell 8, a negative pressure component 2 is provided at the bottom of the shell 8, the negative pressure component 2 includes an annular piston block 203, the annular piston block 203 is slidably connected to the inside of the shell 8, the top of the shell 8 is threadedly connected to a second threaded rod 202, and the second threaded rod 202 passes through the top of the shell 8 and is rotatably connected to the annular piston block 203, the upper surface of the annular piston block 203 is fixed with a second guide rod 201 by bolts, and the shell 8 is slidably connected to the second guide rod 201, the device is placed on the skin outside the position to be inspected, and the annular rubber pad 204 is in contact with the patient's skin, the second threaded rod 202 is rotated to drive the annular piston block 203 to move upward along the shell 8, so that the bottom of the shell 8 is empty. Negative pressure is generated between the two surfaces, so that the device is sucked onto the patient's skin. A plurality of support rods 7 are fixed to the upper surface of the shell 8 by bolts, and an annular slide rail 6 is fixed between the top ends of the plurality of support rods 7 by bolts. The outer side of the annular slide rail 6 is slidably connected to two sliders 9. The upper surfaces of the two sliders 9 are fixed with protrusions 11 by bolts, and the top of the protrusion 11 is installed with a slide rod 10 through a connecting assembly. The connecting assembly includes a corrugated groove, which is opened at the top of the protrusion 11. A plurality of limiting grooves 12 are opened on the outer side of the slide rod 10, and the convex parts on the corrugated groove are stuck in the groove parts of the corresponding positions on the limiting groove 12 and are slidably connected to the groove parts on the limiting groove 12. Through the setting of the connecting assembly, not only can the slide rod 10 be stably moved horizontally along the protrusion 11, but also the position of the slide rod 10 can be limited to prevent it from rotating.

[0035] The first and second press frames 103 are connected to each other through the first threaded rod 105 and the second press frame 103, and the first press frame 101 is in contact with the top of the slide bar 10, and the second press frame 103 is in contact with the upper surface of the annular slide rail 6. The bottom of the second press frame 103 is bonded with an anti-skid pad 104, and the anti-skid pad 104 can increase the friction between the second press frame 103 and the annular slide rail 6. The upper surface of the slide bar 9 is fixed with two first guide rods 102 by bolts, and the first press frame 101 and the second press frame 103 slide along the two first guide rods 102. The first threaded rod 105 is rotated. It drives the first pressure frame 101 and the second pressure frame 103 to move toward the middle along the first guide rod 102 respectively, so that the first pressure frame 101 is separated from the slide rod 10, and the second pressure frame 103 is separated from the annular slide rail 6, and then pushes the slider 9 to move it along the annular slide rail 6 to the required position along the slide rod 10 at the bottom, and then reverses the first threaded rod 105 to reset the first pressure frame 101 and the second pressure frame 103 to re-examine the slide rod 10 and the annular slide rail 6, thereby fixing the position of the slider 9 and the slide rod 10. A positioning cylinder 13 is installed on the slide rod 10, and the top of the positioning cylinder 13 is fixed to the limiting assembly 3 by bolts. The limiting assembly 3 includes two first positioning columns 301, and the two first positioning columns 301 are fixed to the top of the positioning cylinder 13 by bolts.

[0036] It should be noted that a baffle 302 is provided on the outer side between the two first positioning posts 301, and a through hole 303 is opened on the baffle 302. The baffle 302 and the two first positioning posts 301 are fixed by a snap assembly 4. The puncture needle passes through the through hole 303 and enters the interior of the positioning cylinder 13, so that the sharp part of the puncture needle passes through the positioning cylinder 13. Since the diameter of the large head part of the puncture needle is larger than the diameter of the through hole 303, the puncture needle will not continue to move downward. The snap assembly 4 includes a plurality of card slots 401, the bottom of the card slot 401 is flat, and the plurality of card slots 401 are opened on one side of the first positioning post 301. One side of the baffle 302 is fixed with two extension bolts. The retractable rod 403 is fixed with a block 402 between the extended ends of the two telescopic rods 403 by bolts, and the two sides of the block 402 are respectively engaged with the slots 401 at the corresponding positions, the outer side of the telescopic rod 403 is sleeved with a first spring 404, and the two ends of the first spring 404 are respectively fixed to the baffle 302 and the block 402, and the bottom of the positioning cylinder 13 is provided with a positioning clamping assembly 5, pulling the block 402 to move it out of the slot 401, and the telescopic rod 403 is extended, the first spring 404 is extended, and the baffle 302 loses its restriction. The staff moves the baffle 302 downward to change the relative position of the first positioning column 301 and the baffle 302 until the baffle 30 2 drives the spike portion of the puncture needle out of the positioning cylinder 13 to the required length. The staff can judge the distance the puncture needle descends according to the interval of the card slot 401, and then reinsert the card block 402 into the card slot 401 at the corresponding position to achieve fixation. The positioning clamping assembly 5 includes a fixing plate 501, which is fixed to the outside of the positioning cylinder 13 by bolts. One side of the fixing plate 501 is rotatably connected to a screw rod 504, and the outside of the positioning cylinder 13 is slidably connected to a slide 502, and the screw rod 504 is threadedly connected to the slide 502. The other side of the fixing plate 501 is slidably connected to a second positioning column 508, and the bottom end of the second positioning column 508 is connected to the slide 502. The bottom of the slide 502 is fixed, and a slope 503 is provided. A plurality of push rods 505 are slidably connected to the outside of the positioning cylinder 13, and the top of the push rod 505 contacts the slope 503. The push rod 505 extends into one end of the positioning cylinder 13 and is rotatably installed with a ball 506. A second spring 507 is welded to one side of the push rod 505, and the second spring 507 is fixed to the positioning cylinder 13. The screw rod 504 is rotated to drive the slide 502 to move downward along the second positioning column 508, so that the push rod 505 moves inward along the positioning cylinder 13 on the slope 503 until the ball 506 contacts the puncture needle in the positioning cylinder 13, so that the puncture needle is further positioned.

[0037] Working principle of this embodiment: When in use, the patient lies flat on his back and places the device on the skin outside the area to be examined, and the annular rubber pad 204 contacts the patient's skin. The second threaded rod 202 is rotated to drive the annular piston block 203 to move upward along the housing 8, thereby generating negative pressure in the bottom space of the housing 8, so that the device is sucked onto the patient's skin. Then, the first threaded rod 105 is rotated to drive the first pressing frame 101 and the second pressing frame 103 to move toward the middle along the first guide rod 102 respectively, so that the first pressing frame 101 is separated from the slide rod 10. , the second pressing frame 103 is separated from the annular slide rail 6, and then the slider 9 is pushed to move it along the annular slide rail 6 to the desired position along the sliding rod 10 at the bottom, and the sliding rod 10 is moved horizontally to drive the position of the positioning cylinder 13 to change to the desired position, and then the first threaded rod 105 is reversed to reset the first pressing frame 101 and the second pressing frame 103 to re-press the sliding rod 10 and the annular slide rail 6, thereby fixing the position of the slider 9 and the sliding rod 10, and then the puncture needle passes through the through hole 303 and enters the interior of the positioning cylinder 13, so that the puncture needle is inserted into the inner wall of the positioning cylinder 13. The spike portion of the puncture needle passes through the positioning cylinder 13. Since the diameter of the large head portion of the puncture needle is larger than the diameter of the through hole 303, the puncture needle will not continue to move downward. When it is necessary to adjust the length of the spike portion extending out of the positioning cylinder 13, the clamping block 402 is pulled to move it out of the clamping slot 401, and the telescopic rod 403 is extended, and the first spring 404 is extended. At this time, the baffle 302 loses its restriction, and the staff moves the baffle 302 downward to change the relative position of the first positioning column 301 and the baffle 302 until the baffle 302 drives the spike portion of the puncture needle to move out of the positioning cylinder 13. When the required length is reached, the staff can assist in judging the distance the puncture needle has been lowered based on the interval of the card slot 401, and then reinsert the card block 402 into the card slot 401 at the corresponding position to fix it, and then rotate the screw rod 504 to drive the slide 502 to move downward along the second positioning column 508, so that the push rod 505 moves inward along the positioning cylinder 13 on the inclined surface 503 until the ball 506 contacts the puncture needle in the positioning cylinder 13, so that the puncture needle is further positioned. There is no fixed order for the above steps, and they can be operated according to actual use.

[0038] The electrical components mentioned in this article are all connected to an external main controller and 220V AC power, and the main controller can be a conventional known device that performs control such as a computer.

[0039] In the description herein, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood broadly. For example, they may refer to fixed connection, mechanical connection, electrical connection, or direct connection. Those skilled in the art will understand the specific meanings of these terms in the present invention.

[0040] In the description herein, it is to be noted that the terms "comprises," "includes," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements, but also other elements not explicitly listed, or elements that are inherent to such process, method, article, or apparatus.

[0041] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A tumor puncture biopsy positioning device, comprising a housing (8), characterized in that: The bottom of the shell (8) is provided with a negative pressure assembly (2), the upper surface of the shell (8) is fixedly connected with a plurality of support rods (7), the top ends of the plurality of support rods (7) are fixedly connected with an annular slide rail (6), the outer side of the annular slide rail (6) is movably connected with two sliders (9), the upper surfaces of the two sliders (9) are fixedly connected with a protrusion (11), the top of the protrusion (11) is installed with a slide rod (10) through a connecting assembly, the connecting assembly includes a corrugated groove, the corrugated groove is opened on the top of the protrusion (11), the outer side of the slide rod (10) is provided with a plurality of limiting grooves (12), and the convex part on the corrugated groove is stuck in the groove part of the corresponding position on the limiting groove (12) and slides with the groove part on the limiting groove (12). The upper surface of the slider (9) is provided with a locking assembly (1) for limiting the position of the slide bar (10), a positioning cylinder (13) is installed on the slide bar (10), the top of the positioning cylinder (13) is fixedly connected to the limiting assembly (3), the limiting assembly (3) includes two first positioning columns (301), the two first positioning columns (301) are fixed to the top of the positioning cylinder (13) by bolts, a baffle (302) is provided on the outer side between the two first positioning columns (301), a through hole (303) is opened on the baffle (302), the baffle (302) and the two first positioning columns (301) are fixed by a snap-fit ​​assembly (4), and a positioning clamping assembly (5) is provided at the bottom of the positioning cylinder (13).

2. A tumor puncture biopsy positioning device according to claim 1, characterized in that: The negative pressure assembly (2) includes an annular piston block (203), which is slidably connected to the interior of the housing (8); the top of the housing (8) is movably connected to a second threaded rod (202), and the second threaded rod (202) passes through the top of the housing (8) and is rotatably connected to the annular piston block (203).

3. The tumor puncture biopsy positioning device according to claim 1, characterized in that: The locking assembly (1) includes a first threaded rod (105), the first threaded rod (105) is rotatably connected to the top of the slider (9), the outer side of the first threaded rod (105) is movably connected to a first pressure frame (101) and a second pressure frame (103), and the first pressure frame (101) is in contact with the top of the slider (10), and the second pressure frame (103) is in contact with the upper surface of the annular slide rail (6), the upper surface of the slider (9) is fixedly connected to two first guide rods (102), and the first pressure frame (101) and the second pressure frame (103) slide along the two first guide rods (102).

4. The tumor puncture biopsy positioning device according to claim 1, characterized in that: The locking assembly (4) includes a plurality of slots (401), the plurality of slots (401) being opened on one side of the first positioning column (301), two telescopic rods (403) being fixedly connected to one side of the baffle (302), a clamping block (402) being fixedly connected between the extended ends of the two telescopic rods (403), and two sides of the clamping block (402) being respectively clamped with the slots (401) at corresponding positions, a first spring (404) being sleeved on the outer side of the telescopic rod (403), and two ends of the first spring (404) being respectively fixed to the baffle (302) and the clamping block (402).

5. The tumor puncture biopsy positioning device according to claim 1, characterized in that: The positioning clamping assembly (5) includes a fixed plate (501), which is fixed to the outside of the positioning cylinder (13) by bolts, and one side of the fixed plate (501) is movably connected to a screw rod (504), and the outside of the positioning cylinder (13) is movably connected to a slide (502), and the screw rod (504) is threadedly connected to the slide (502), and the other side of the fixed plate (501) is movably connected to a second positioning column (508), and the bottom end of the second positioning column (508) is connected to the slide. The slide (502) is fixed with a plurality of push rods (505) on the outside of the positioning cylinder (13), and the top of the push rod (505) contacts the inclined surface (503). One end of the push rod (505) extending into the positioning cylinder (13) is rotatably mounted with a ball (506). One side of the push rod (505) is fixedly connected with a second spring (507), and the second spring (507) is fixed to the positioning cylinder (13).

6. The tumor puncture biopsy positioning device according to claim 3, characterized in that: The bottom of the second pressing frame (103) is fixedly connected with an anti-slip pad (104).

7. The tumor puncture biopsy positioning device according to claim 2, characterized in that: The upper surface of the annular piston block (203) is fixedly connected to a second guide rod (201), and the housing (8) is slidably connected to the second guide rod (201).

8. The tumor puncture biopsy positioning device according to claim 1, characterized in that: An annular rubber pad (204) is fixedly connected to the bottom of the housing (8).

9. The method for positioning tumor puncture biopsy according to claim 1, characterized in that: The following steps are involved: The patient lies flat on his back and places the entire device on the skin outside the location to be examined, with the annular rubber pad (204) in contact with the patient's skin. The second threaded rod (202) is rotated to drive the annular piston block (203) to move upward along the housing (8), thereby generating negative pressure in the bottom space of the housing (8) and causing the device to be sucked onto the patient's skin. The first threaded rod (105) is rotated to drive the first pressing frame (101) and the second pressing frame (103) to move toward the middle along the first guide rod (102), so that the first pressing frame (101) is separated from the slide rod (10), and the second pressing frame (103) is separated from the annular slide rail (6). Then, the slider (9) is pushed to move along the annular slide rail (6) to the required position along the slide rod (10) at the bottom, and the slide rod (10) is moved horizontally to drive the position of the positioning cylinder (13) to change to the required position. Then, the first threaded rod (105) is reversed to reset the first pressing frame (101) and the second pressing frame (103) to re-press the slide rod (10) and the annular slide rail (6), thereby fixing the position of the slider (9) and the position of the slide rod (10). Then, the puncture needle is passed through the through hole (303) and enters the interior of the positioning cylinder (13), so that the sharp part of the puncture needle passes through the positioning cylinder (13). Since the diameter of the large head part of the puncture needle is larger than the diameter of the through hole (303), the puncture needle will not continue to move downward; When adjusting the length of the spike portion extending out of the positioning cylinder (13), pull the card block (402) to move it out of the card slot (401), and the telescopic rod (403) is extended, and the first spring (404) is extended. At this time, the baffle (302) loses its restriction, and the staff moves the baffle (302) downward to change the relative position of the first positioning column (301) and the baffle (302) until the baffle (302) drives the spike portion of the puncture needle to move out of the positioning cylinder (13) to the required length. The staff can adjust the length of the baffle according to the card block. The interval of the groove (401) assists in determining the distance the puncture needle has descended, and then the card block (402) is reinserted into the corresponding position of the card slot (401) to achieve fixation, and then the screw rod (504) is rotated to drive the slide (502) to move downward along the second positioning column (508), thereby causing the push rod (505) to move inward along the positioning cylinder (13) on the inclined surface (503) until the ball (506) contacts the puncture needle in the positioning cylinder (13), so that the puncture needle is further positioned.

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