Animal liver biopsy device

Abstract

This invention discloses a liver biopsy device for animal experiments. Experimental animals with liver disease are placed on an experimental table for liver biopsy. A front control block and a rear control block are fixed to the front and rear sides of the experimental table, respectively. A support crossbeam is connected to the front control block, and a support stand is fixedly installed below the support crossbeam. An animal liver biopsy angle adjustment mechanism is provided between the support stand and the experimental table, allowing adjustment of the corresponding angle of the experimental table according to the needs of the animal experiment, facilitating liver biopsy operations for medical personnel. An intelligent liver biopsy control mechanism is located above the support stand. Based on the size of different animals, the corresponding position of the animal's liver is first determined, and the movement of the liver biopsy instrument is precisely adjusted mechanically to quickly complete the liver biopsy. This liver biopsy device for animal experiments can precisely and flexibly adjust the liver biopsy angle of experimental animals and can mechanically and automatically complete the liver biopsy operation, improving the accuracy of the liver biopsy procedure.

Description

Technical Field

[0001] This invention relates to the field of animal liver biopsy technology, specifically to liver biopsy apparatus for animal experiments. Background Technology

[0002] In animal experiments, in order to establish experimental models of liver diseases and evaluate drug efficacy, animals need to be sacrificed at regular intervals and their livers need to be taken for pathological staining analysis. This requires the processing of a large number of animals and is costly. The liver biopsy device can simulate the process of human liver biopsy and study the pathological evolution of drug intervention after model establishment and induction in a limited number of animals.

[0003] The liver puncture needle disclosed in CN200951099Y includes an injection nipple at the front end of an injection syringe and an injection needle with a needle sheath mounted thereon, a syringe seat with an everted rear end, a rubber piston installed at one end inserted into the syringe, and a 3-4 leaflet push rod forming a wrench at the other end. Due to a movable limiting baffle, the inner edge of the cross-shaped valve is embedded in a notch groove on the edge of the pulled-out push rod, achieving continuous negative pressure and eliminating concerns for the operator about insufficient negative pressure caused by unstable hand grip. This invention is applicable not only to liver punctures but also to the puncture of other solid organs or tissues. The needle sheath supports and limits the needle insertion depth, facilitating control of the insertion depth and preventing unnecessary vascular and nerve damage. However, this puncture needle requires manual puncture during medical experiments, which can be difficult to perform on smaller animals.

[0004] The liver biopsy bed disclosed in CN202620106U includes a bed board and bed legs. Its distinguishing feature is a hanging ring on the inner side of the middle section of the bed board, an inclined arm on the outer side of the upper right section of the bed board, a support groove at the front end of the inclined arm, an elastic band in the middle section of the inclined arm, and a pressure bag on the elastic band. This invention has a simple structure, preventing numbness and discomfort in the patient's arm during liver biopsy. It is easy to operate, saves time and effort, and reduces the workload of medical staff. However, this biopsy bed is not convenient for adjusting the angle according to the specific experimental needs. Adjusting the angle of the animal placed on the bed requires the use of a mat, making the operation somewhat inconvenient.

[0005] A liver puncture locator, disclosed in CN214595960U, includes a C-shaped plate, a tightening mechanism, a support rod, a top rod, a lateral adjustment mechanism, a longitudinal adjustment mechanism, a second servo motor, a rotating rod, a clamping mechanism, and a control panel. The top of the C-shaped plate has a tightening mechanism, and the top end of the C-shaped plate away from the tightening mechanism is fixedly connected to the support rod. The advantages of this invention are: it has a compact structure and strong practicality; the tightening mechanism at the C-shaped plate facilitates better fixation of the device to the edge of the operating table; the lateral adjustment mechanism facilitates adjustment of the lateral angle of the top rod; the longitudinal adjustment mechanism facilitates adjustment of the longitudinal height of the mounting plate; the second servo motor facilitates adjustment of the tilt angle of the mounting plate; the clamping mechanism facilitates better clamping of the ultrasonic locator; and the needle tube groove and needle tip hole facilitate more time-saving and labor-saving needle insertion by medical personnel, eliminating the need for manual alignment and reducing surgical errors. However, this puncture locator has limited adjustment range for the puncture needle angle and is not suitable for fully automated control of the puncture needle puncturing the animal liver.

[0006] Existing animal experiments simulate human liver biopsy procedures, requiring experimenters to manually control the puncture needle to quickly puncture the animal's liver. However, some small animals are too small to accurately locate and puncture the liver, making the operation quite difficult. Furthermore, during liver biopsy, if it is necessary to control the animal's slight tilt to assist the experiment, it is necessary to elevate one side of the animal's body using objects such as cushions. This makes it difficult to control the angle of the animal's body tilt, and the operation is also very inconvenient.

[0007] Therefore, it is necessary to design a liver biopsy device for animal experiments to address the above problems. Summary of the Invention

[0008] The purpose of this invention is to provide a liver biopsy device for animal experiments, in order to solve the problems mentioned in the background art. In some existing animal experiments that simulate human liver biopsy, the experimenter needs to manually control the puncture needle to quickly puncture the animal's liver. However, some small animals are small in size, making it difficult to accurately locate and puncture the liver, which makes the operation quite difficult. Furthermore, if it is necessary to control the slight tilt of the animal during the liver biopsy to assist the experiment, it is necessary to raise one side of the animal's body using objects such as pads. This makes it difficult to control the angle of the animal's body tilt, and the operation is also very inconvenient.

[0009] To achieve the above objectives, the present invention provides the following technical solution: a liver biopsy device for animal experiments, in which experimental animals with liver diseases are placed on an experimental table to perform liver puncture medical procedures;

[0010] Liver biopsy apparatus for animal experiments includes:

[0011] The experimental table has through slots on both the front and rear sides, and sterile surgical cloths are connected through the interior of the front and rear through slots.

[0012] The experimental platform is fixed with a front control block and a rear control block on the front and rear sides below, respectively. The front control block is connected to a support crossbeam, and a support stand is fixedly installed below the support crossbeam. The experimental platform is supported on the ground by two sets of support stands on the left and right sides.

[0013] An animal liver biopsy angle adjustment mechanism is provided between the support frame and the experimental table, which can adjust the corresponding angle of the experimental table according to the needs of animal experiments, making it convenient for medical personnel to perform liver biopsy.

[0014] The support frame is equipped with an intelligent liver biopsy control mechanism. Based on the size of different animals, the corresponding position of the animal's liver is first determined, and the movement of the liver biopsy instrument is precisely adjusted mechanically to quickly complete the liver biopsy.

[0015] Preferably, the sterile surgical drape has a locking and unlocking structure with the experimental table through a through groove, and the surface of the sterile surgical drape has a diagonal anti-slip structure.

[0016] Preferably, the animal liver biopsy angle adjustment mechanism includes a mounting angle plate fixed to the front side of the support frame, and a cylinder is fixed on the upper surface of the mounting angle plate. A driving angle plate is fixed at the upper lifting end of the cylinder. A hollow ring is fixedly installed on the upper surface of the driving angle plate, and the side of the hollow ring is connected to the side of the front control block through a frame ring.

[0017] Preferably, the experimental platform is fixedly and synchronously driven with the front control block and the rear control block, and the experimental platform forms a rotating structure with the rear of the support crossbeam through the front control block.

[0018] Preferably, the lower part of the frame ring penetrates the interior of the hollow ring to form a rotating structure, and the upper part of the frame ring penetrates the interior of the front control block to form a rotating structure.

[0019] Preferably, the liver puncture intelligent control mechanism includes a damping slide frame that engages with the outside of the supporting crossbeam, and a displacement frame is fixedly connected to the outside of the damping slide frames on both sides. An electric slide rail is fixedly installed on the inner top surface of the displacement frame. An electric slider is slidably mounted below the electric slide rail, and a driver is fixed below the electric slider. A steering wheel is connected to the upper output end of the driver. A fixing frame is fixed to the side of the steering wheel, and the inner side of the fixing frame is connected to the lower outer side of the C-shaped frame through an electric drive telescopic rod. A convex plate is fixed to the upper outer side of the C-shaped frame. An electric drive lifting rod is fitted and fixed inside the C-shaped frame, and a lower protective cover is fixed to the lower lifting end of the electric drive lifting rod. A puncture needle is installed through the lower protective cover.

[0020] Preferably, the two ends of the electric telescopic rod form a rotating structure with the inner side of the fixed frame and the outer side of the C-shaped frame, respectively, and the side of the fixed frame forms a rotating structure with the electric slider through the steering wheel.

[0021] Preferably, the upper side of the C-shaped frame forms a rotating structure with the fixed frame via a convex plate, and the convex plate is fitted into the middle position inside the fixed frame.

[0022] Preferably, the puncture needle is provided with a clamping and limiting mechanism on the outside. The puncture needle is installed inside the lower protective cover and is clamped and squeezed by the structure to limit its assembly position and maintain the stability of the puncture operation.

[0023] The clamping and limiting mechanism includes a vertical plate fixed to the upper surface of the lower protective cover, and an upper protective cover fixed to the upper side of the vertical plate. Clamping rods are connected through the sides of the upper and lower protective covers, and positioning side plates are fixedly sleeved on the outside of the clamping rods. A back plate is fixed to the middle of the back of the vertical plate, and a rotating cylinder is rotatably installed on the inner side of the back plate. Threaded rods are connected to the left and right sides of the rotating cylinder, and internally threaded cylinders are sleeved on the outside of the threaded rods.

[0024] Preferably, the puncture needle is provided with a clamping and limiting mechanism on the outside. The puncture needle is installed inside the lower protective cover and is clamped and squeezed by the structure to limit its assembly position and maintain the stability of the puncture operation.

[0025] The clamping and limiting mechanism includes a vertical plate fixed to the upper surface of the lower protective cover, and an upper protective cover fixed to the upper side of the vertical plate. Clamping rods are connected through the sides of the upper and lower protective covers, and positioning side plates are fixedly sleeved on the outside of the clamping rods. A back plate is fixed to the middle of the back of the vertical plate, and a rotating cylinder is rotatably installed on the inner side of the back plate. Threaded rods are connected to the left and right sides of the rotating cylinder, and internally threaded cylinders are sleeved on the outside of the threaded rods.

[0026] Compared with the prior art, the beneficial effects of the present invention are: the liver puncture device for animal experiments is equipped with an animal liver puncture experiment angle adjustment mechanism and a liver puncture intelligent control mechanism, which completes the puncture operation through mechanical and intelligent control of the puncture needle, ensuring precise puncture operation, and can flexibly control the tilt of the animal's body to assist in the completion of the experiment. The specific details are as follows:

[0027] 1. The rear of the experimental platform is connected to the supporting cross frame via a rear control block to form a rotating structure. The front control block and the front of the experimental platform are raised by the mechanical transmission structure on the front side, which adjusts the connection angle between the experimental platform and the supporting cross frame, so as to adjust the experimental tilt angle of the animal more precisely and flexibly.

[0028] The cylinder pushes the drive angle plate to move up and down, and the drive angle plate drives the hollow ring to move up and down synchronously. At this time, the two ends of the frame ring connected to the side of the hollow ring rotate accordingly. The frame ring can control the front control block and the front side of the experimental platform to move up and down, so as to drive the rear end of the experimental platform to rotate and adjust the angle through the rear control block.

[0029] 2. The sterile surgical drape is connected to the front and rear sides of the experimental table through a through slot. The locking structure keeps the sterile surgical drape relatively stable above the experimental table, preventing it from sliding down when the experimental table is tilted.

[0030] 3. The movement of the transfer frame can be controlled in the front and back directions by the damping slide frame, and the lateral movement of the fixed frame and puncture needle can be controlled in the left and right directions by the electric slide rail and electric slider. This part of the structure can adjust the position of the puncture needle above the experimental table in the front, back, left and right directions, so as to adjust the corresponding puncture position of the puncture needle according to the size of the animal.

[0031] The actuator can control the circumferential rotation of the fixed frame, and the electric drive telescopic rod can control the tilt rotation of the C-shaped frame. Through this angle adjustment structure, the tilt direction and tilt angle of the puncture needle relative to the animal's body surface can be adjusted to complete the puncture operation more accurately.

[0032] The puncture needle is assembled through the upper and lower protective covers, and the rotating drum drives the threaded rod to rotate. Under the action of the threaded transmission structure, the clamping rods on the left and right sides can be controlled to move inward, so that the clamping rods hold the outside of the puncture needle, limiting the assembly position of the puncture needle and stably assembling the puncture needle in the experimental instrument. This allows the puncture operation to be completed automatically through the mechanical structure, improving the accuracy of the puncture and facilitating the control of the puncture depth and speed. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the overall elevation structure of the present invention;

[0034] Figure 2 This is a schematic diagram of the elevation structure of the experimental platform of the present invention;

[0035] Figure 3 This is a schematic diagram of the support frame elevation structure of the present invention;

[0036] Figure 4 This is a schematic diagram of the frame ring elevation structure of the present invention;

[0037] Figure 5 This is a schematic diagram of the elevation structure of the displacement frame of the present invention;

[0038] Figure 6 This is a schematic diagram of the fixed frame elevation structure of the present invention;

[0039] Figure 7 This is a schematic diagram of the elevation structure of the electric-driven telescopic rod of the present invention;

[0040] Figure 8 This is a schematic diagram of the vertical structure of the lower protective cover of the present invention;

[0041] Figure 9This is a schematic diagram of the elevation structure of the protective cover of the present invention;

[0042] Figure 10 This is a schematic diagram of the elevation structure of the threaded rod of the present invention.

[0043] In the diagram: 1. Experimental table; 2. Through slot; 3. Sterile surgical drape; 4. Front control block; 5. Rear control block; 6. Support crossbar; 7. Support upright; 8. Mounting corner piece; 9. Cylinder; 10. Drive corner piece; 11. Hollow ring; 12. Frame ring; 13. Damping slide frame; 14. Transfer frame; 15. Electric slide rail; 16. Electric slider; 17. Driver; 18. Steering wheel; 19. Fixed frame; 20. Electricly driven telescopic rod; 21. C-shaped frame; 22. Protruding plate; 23. Electricly driven lifting rod; 24. Lower protective cover; 25. Puncture needle; 26. Upright plate; 27. Upper protective cover; 28. Clamping rod; 29. ​​Positioning side plate; 30. Back plate; 31. Rotary cylinder; 32. Threaded rod; 33. Internally threaded cylinder. Detailed Implementation

[0044] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0045] Example 1

[0046] like Figures 1-2 As shown, the animal is placed on experimental table 1 so that the experimenter can perform a liver biopsy. The specific structure is as follows:

[0047] Experimental animals for liver disease are placed on experimental table 1 to perform liver puncture medical procedures; the front and rear sides of experimental table 1 are provided with through grooves 2, and sterile surgical cloths 3 are connected through the inside of the front and rear through grooves 2; front control block 4 and rear control block 5 are fixed on the front and rear sides of the bottom of experimental table 1, and a support crossbeam 6 is connected to the outside of the front control block 4, and a support frame 7 is fixedly installed below the support crossbeam 6. The experimental table 1 is supported on the ground by two sets of support frames 7 on the left and right.

[0048] The sterile surgical drape 3 is connected to the experimental table 1 through the through groove 2 to form a snap-fit ​​and detachable structure, and the surface of the sterile surgical drape 3 is a diagonal anti-slip structure.

[0049] The sterile surgical drape 3 is connected to the front and rear sides of the experimental table 1 through the through groove 2. The sterile surgical drape 3 is laid in the middle of the upper surface of the experimental table 1. When the experimental animal is placed on the sterile surgical drape 3 on the experimental table 1, the sterile surgical drape 3 will not fall off the experimental table 1 due to the locking structure when the experimental table 1 is rotated and tilted. In addition, the surface of the sterile surgical drape 3 has a diagonal anti-slip structure, which can also relatively limit the experimental position of the animal above.

[0050] Example 2

[0051] like Figures 1-4 As shown, the rotation angle of the experimental platform 1 can be adjusted through a mechanical structure according to the animal's size and experimental needs. The specific structure is as follows:

[0052] An animal liver biopsy angle adjustment mechanism is provided between the support frame 7 and the experimental table 1, which can adjust the corresponding angle of the experimental table 1 according to the needs of animal experiments, making it convenient for medical personnel to perform liver biopsy.

[0053] The angle adjustment mechanism for animal liver puncture experiment includes a mounting plate 8 fixed to the front side of the support frame 7, and a cylinder 9 fixed on the upper surface of the mounting plate 8. A driving plate 10 is fixed at the upper lifting end of the cylinder 9. A hollow ring 11 is fixedly mounted on the upper surface of the driving plate 10, and the side of the hollow ring 11 is connected to the side of the front control block 4 through a frame ring 12.

[0054] The experimental platform 1 is fixed and synchronously driven with the front control block 4 and the rear control block 5, and the experimental platform 1 forms a rotating structure with the support crossbeam 6 behind the front control block 4; the lower part of the frame ring 12 and the interior of the hollow ring 11 form a rotating structure, and the upper part of the frame ring 12 and the interior of the front control block 4 form a rotating structure.

[0055] According to the size of the experimental animal and the needs of the experiment, the operating cylinder 9 pushes the drive horn plate 10 to move up and down. The drive horn plate 10 drives the hollow ring 11 to move up and down synchronously. The upper and lower ends of the frame ring 12 connected between the hollow ring 11 and the front control block 4 rotate accordingly. The frame ring 12 pushes the front side of the experimental table 1 to move up and down. The rear side of the experimental table 1 rotates in correspondence with the support crossbar 6 through the rear control block 5. The angle of the experimental table 1 can be adjusted more precisely and flexibly through the mechanical structure to assist the animal in completing the liver biopsy.

[0056] Example 3

[0057] like Figure 1 and Figures 5-10 As shown, the experimental setup includes an autonomous liver biopsy operation mechanism, eliminating the need for manual control and making the liver biopsy more precise. The specific structure is as follows:

[0058] The support frame 7 is equipped with a liver biopsy intelligent control mechanism. According to the size of different animals, the corresponding position of the animal's liver is first determined, and the movement of the liver biopsy instrument is precisely adjusted mechanically to quickly complete the liver biopsy operation.

[0059] The liver puncture intelligent control mechanism includes a damping slide frame 13 that engages with the outside of the support crossbeam 6, and a shift frame 14 is fixedly connected to the outside of the damping slide frames 13 on both sides. An electric slide rail 15 is fixedly installed on the inner top surface of the shift frame 14. An electric slider 16 is slidably mounted below the electric slide rail 15. A driver 17 is fixed below the electric slider 16. A steering wheel 18 is connected to the upper output end of the driver 17. A fixing frame 19 is fixed to the side of the steering wheel 18. The inner side of the fixing frame 19 is connected to the lower outer side of the C-shaped frame 21 through an electric drive telescopic rod 20. A convex plate 22 is fixed to the upper outer side of the C-shaped frame 21. An electric drive lifting rod 23 is fitted and fixed inside the C-shaped frame 21. A lower protective cover 24 is fixed to the lower lifting end of the electric drive lifting rod 23. A puncture needle 25 is installed through the lower protective cover 24.

[0060] The two ends of the electrically driven telescopic rod 20 form a rotating structure with the inner side of the fixed frame 19 and the outer side of the C-shaped frame 21, respectively. The side of the fixed frame 19 forms a rotating structure with the electric slider 16 through the steering wheel 18. The upper side of the C-shaped frame 21 forms a rotating structure with the fixed frame 19 through the convex plate 22, which is fitted into the middle position of the inner side of the fixed frame 19. A clamping and limiting mechanism is provided on the outside of the puncture needle 25. The puncture needle 25 is installed inside the lower protective cover 24. The clamping and squeezing structure can limit its assembly position and maintain the stability of the puncture operation of the puncture needle 25. The clamping and limiting mechanism includes a vertical plate 26 fixed to the upper surface of the lower protective cover 24, and an upper protective cover 27 is fixed to the upper side of the vertical plate 26. The sides of the upper protective cover 27 and the lower protective cover 24 are connected through the vertical plate 26. A clamping rod 28 is attached, and a positioning side plate 29 is fixedly sleeved on the outside of the clamping rod 28. A back plate 30 is fixed at the middle position of the back of the upright plate 26, and a rotating cylinder 31 is rotatably installed on the inner side of the back plate 30. Threaded rods 32 are connected to the left and right sides of the rotating cylinder 31, and an internally threaded column 33 is sleeved on the outside of the threaded rod 32. The upper protective cover 27 is positioned directly above the circular groove of the lower protective cover 24, and both the upper and lower protective covers 27 and 24 are sleeved on the outside of the puncture needle 25. The clamping rod 28, the positioning side plate 29, and the internally threaded column 33 are fixed as an integrated drive structure, and the upper and lower ends of the clamping rod 28 penetrate the sides of the upper and lower protective covers 27 and 24 respectively to form a sliding structure. The internally threaded column 33 and the threaded rod 32 form a threaded transmission structure.

[0061] The damping slide frame 13 controls the shift frame 14 to slide back and forth above the experimental table 1. The shift frame 14 drives the inner puncture needle 25 to move synchronously in the back and forth direction. The electric slide rail 15 controls the electric slider 16 to slide laterally. The electric slider 16 controls the puncture needle 25 to move in the left and right direction. According to the size of the experimental animal and the experimental needs, the position of the puncture needle 25 in the back, front, left and right directions is adjusted so that the puncture needle 25 corresponds to the position above the liver of the experimental animal.

[0062] The drive driver 17 controls the steering wheel 18 to rotate, and the steering wheel 18 controls the fixed frame 19 to rotate circumferentially. Then, the electric drive telescopic rod 20 is operated. The two ends of the electric drive telescopic rod 20 are connected between the fixed frame 19 and the C-shaped frame 21 and rotate accordingly. Through this structure, the C-shaped frame 21 can be controlled to tilt and rotate on the side of the fixed frame 19. Through this part of the structure, the puncture direction and puncture angle of the puncture needle 25 above the experimental animal can be adjusted.

[0063] The puncture needle 25 is inserted into the interior of the upper protective cover 27 and the lower protective cover 24. The rotating drum 31 is controlled to rotate, and the rotating drum 31 drives the threaded rods 32 on both sides to rotate. The threaded rods 32 are threadedly assembled with the internal threaded column 33. Under the action of the threaded transmission structure, the internal threaded column 33 and the positioning side plate 29 can be controlled to move laterally. The positioning side plate 29 controls the clamping rod 28 to slide through the sides of the upper protective cover 27 and the lower protective cover 24. The two sets of clamping rods 28 move inward to clamp the outer side of the puncture needle 25. Through the clamping structure, the puncture needle 25 can be quickly clamped and limited to the inside of the upper protective cover 27 and the lower protective cover 24. Through this part of the structure, it can be quickly limited in the experimental device.

[0064] The electric lifting rod 23 pushes the lower protective cover 24 downward, and the lower protective cover 24 controls the puncture needle 25 to move downward. The puncture needle 25 quickly and accurately punctures into the body of the experimental animal. The mechanical transmission structure can control the puncture position, puncture depth and puncture speed more accurately, resulting in higher experimental accuracy and more convenient operation.

[0065] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. Liver biopsy device for animal experiments: liver disease experimental animals are placed on the experimental table (1) to complete the liver biopsy medical operation; Its features are, include: The experimental table (1) has through slots (2) on both the front and back sides, and sterile surgical cloth (3) is connected through the inside of the front and back through slots (2). The experimental platform (1) has a front control block (4) and a rear control block (5) fixed on its lower front and rear sides respectively. The front control block (4) is connected to a support crossbeam (6), and a support frame (7) is fixedly installed below the support crossbeam (6). The experimental platform (1) is supported on the ground by two sets of support frames (7) on the left and right sides. An animal liver biopsy angle adjustment mechanism is provided between the support frame (7) and the experimental table (1), which can adjust the corresponding angle of the experimental table (1) according to the needs of animal experiments, making it convenient for medical personnel to perform liver biopsy. The support frame (7) is equipped with a liver biopsy intelligent control mechanism. According to the size of different animals, the corresponding position of the animal's liver is first determined, and the movement of the liver biopsy instrument is precisely adjusted mechanically to quickly complete the liver biopsy operation.

2. The liver biopsy device for animal experiments according to claim 1, characterized in that: The sterile surgical drape (3) is connected to the experimental table (1) through the through groove (2) to form a snap-fit ​​and detachable structure, and the surface of the sterile surgical drape (3) is a diagonal anti-slip structure.

3. The liver biopsy device for animal experiments according to claim 1, characterized in that: The animal liver biopsy angle control mechanism includes an installation angle piece (8) fixed on the front side of the support frame (7), and a cylinder (9) is fixed on the upper surface of the installation angle piece (8). A driving angle piece (10) is fixed at the upper lifting end of the cylinder (9). A hollow ring (11) is fixedly installed on the upper surface of the driving angle piece (10), and the side of the hollow ring (11) is connected to the side of the front control block (4) through a frame ring (12).

4. The liver biopsy device for animal experiments according to claim 3, characterized in that: The experimental platform (1) is fixedly and synchronously driven with the front control block (4) and the rear control block (5), and the experimental platform (1) forms a rotating structure with the support crossbeam (6) behind the front control block (4).

5. The liver biopsy device for animal experiments according to claim 3, characterized in that: The lower part of the frame ring (12) penetrates the interior of the hollow ring (11) to form a rotating structure, and the upper part of the frame ring (12) penetrates the interior of the front control block (4) to form a rotating structure.

6. The liver biopsy device for animal experiments according to claim 1, characterized in that: The liver puncture intelligent control mechanism includes a damping slide frame (13) engaged with the outside of the supporting crossbeam (6), and a displacement frame (14) is fixedly connected to the outside of the damping slide frames (13) on both sides. An electric slide rail (15) is fixedly installed on the inner top surface of the displacement frame (14). An electric slider (16) is slidably mounted below the electric slide rail (15), and a driver (17) is fixedly mounted below the electric slider (16). A steering wheel (18) is connected to the upper output end of the driver (17). The steering wheel (18) is fixed with a fixed frame (19) on its side, and the inner side of the fixed frame (19) is connected to the lower outer side of the C-shaped frame (21) through an electric drive telescopic rod (20). A convex plate (22) is fixed on the upper outer side of the C-shaped frame (21). An electric drive lifting rod (23) is fitted and fixed inside the C-shaped frame (21). A lower protective cover (24) is fixed at the lower lifting end of the electric drive lifting rod (23), and a puncture needle (25) is installed through the interior of the lower protective cover (24).

7. The liver biopsy device for animal experiments according to claim 6, characterized in that: The two ends of the electric telescopic rod (20) form a rotating structure with the inner side of the fixed frame (19) and the outer side of the C-shaped frame (21), respectively, and the side of the fixed frame (19) forms a rotating structure with the electric slider (16) through the steering wheel (18).

8. The liver biopsy device for animal experiments according to claim 6, characterized in that: The upper side of the C-shaped frame (21) forms a rotating structure with the fixed frame (19) through the convex plate (22), and the convex plate (22) is fitted into the middle position of the inner side of the fixed frame (19).

9. The liver biopsy device for animal experiments according to claim 6, characterized in that: The puncture needle (25) is provided with a clamping and limiting mechanism on the outside. The puncture needle (25) is installed inside the lower protective cover (24) through the clamping and squeezing structure, which can limit its assembly position and maintain the stability of the puncture operation of the puncture needle (25). The clamping and limiting mechanism includes a vertical plate (26) fixed on the upper surface of the lower protective cover (24), and an upper protective cover (27) fixed on the upper side of the vertical plate (26). A clamping rod (28) is connected through the sides of the upper protective cover (27) and the lower protective cover (24). A positioning side plate (29) is fixed on the outside of the clamping rod (28). A back plate (30) is fixed in the middle of the back of the vertical plate (26). A rotating cylinder (31) is rotatably installed on the inside of the back plate (30). Threaded rods (32) are connected to the left and right sides of the rotating cylinder (31). An internally threaded column (33) is installed on the outside of the threaded rod (32).

10. The liver biopsy device for animal experiments according to claim 9, characterized in that: The upper protective cover (27) is positioned directly above the circular groove of the lower protective cover (24), and both the upper protective cover (27) and the lower protective cover (24) are fitted over the outside of the puncture needle (25). The clamping rod (28) is fixed to the positioning side plate (29) and the internal threaded column (33) as an integrated drive structure, and the upper and lower ends of the clamping rod (28) are respectively connected to the sides of the upper protective cover (27) and the lower protective cover (24) to form a sliding structure. The internal threaded column (33) and the threaded rod (32) form a threaded transmission structure.

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