Biopsy taking instrument for spinal focus and operation method of biopsy taking instrument

Abstract

The invention provides a biopsy instrument for spinal focuses and an operation method of the biopsy instrument. The biopsy instrument comprises a biopsy device body; the reamer is rotationally arranged in the lower end of the biopsy device body and used for cutting and twisting off tissue in the biopsy device body; the first groove is formed in the lower end of the biopsy device body and used for hiding and storing the reamer; the control rod is arranged in the first groove, connected with the reamer and used for driving the reamer to swing to adjust the cutting depth; and the adjusting transmission mechanism is in transmission connection with the control rod and is used for driving the control rod to rotate and adjust. The biopsy device body directly goes deep into a vertebral body to obtain tissues, and can reach a focus part more accurately, so that the sampling accuracy is greatly improved, and a reliable basis is provided for doctors to accurately diagnose illness conditions.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a biopsy instrument for spinal lesions and its operation method. Background Technology

[0002] In the diagnosis of spinal diseases, obtaining accurate tissue samples from the lesions is crucial for determining the type of disease and developing a reasonable treatment plan.

[0003] Currently, the standard clinical procedure for biopsy forceps involves first establishing a channel to the vertebral body, then inserting the forceps with the nozzle closed into the vertebral body. Once the target location is reached, the nozzles of the forceps are opened to grasp the tissue. However, during this opening process, the nozzles of the forceps can exert a pushing effect on surrounding tissues, potentially displacing them further away. This often results in the inability to accurately grasp the target lesion, affecting the accuracy and effectiveness of the sampling, and potentially delaying the diagnosis and treatment of the disease.

[0004] Although there are some improved biopsy device concepts in the existing technology, such as constructing a cylindrical hollow biopsy unit, the tissue inside the vertebral body gradually fills the hollow column of the biopsy unit as it is slowly screwed into the vertebral body. However, because the tissue inside the hollow column is still connected to the human tissue, when the biopsy forceps are simply pulled out, the pathological tissue inside the biopsy forceps can easily detach due to this connection, making it impossible to completely remove the sample. This still cannot meet the clinical need for precise sampling of spinal lesions.

[0005] Therefore, developing a biopsy instrument and its operation method that can effectively solve the above problems and improve the accuracy and success rate of spinal lesion sampling is of great practical significance. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to overcome the defects of the existing technology. The present invention proposes a biopsy instrument for spinal lesions and its operation method.

[0007] To address the aforementioned issues, some existing biopsy device designs, such as constructing a cylindrical hollow biopsy unit, exist. While this biopsy unit is slowly screwed into the vertebral body, the tissue within the vertebral body gradually fills the hollow cylinder of the biopsy unit. However, because the tissue within the hollow cylinder remains connected to the human tissue, when the biopsy forceps are simply pulled out, the pathological tissue inside the forceps can easily detach due to this connection, making it impossible to completely remove the sample. This still fails to meet the technical problem of accurately sampling spinal lesions in clinical practice. The technical solution adopted in this invention is: A biopsy device for spinal lesions, comprising: a biopsy device body; A reamer, rotatably disposed inside the lower end of the biopsy unit, is used to cut and sever the tissue inside the biopsy unit. The first groove is formed at the lower end of the biopsy unit body for hiding and storing the reamer; A control lever, located inside the first groove and connected to the reamer, is used to drive the reamer to swing and adjust the cutting depth. An adjustment transmission mechanism is connected to the control lever and is used to drive the control lever to rotate and adjust.

[0008] Preferably, the adjusting transmission mechanism includes: a sleeve disposed at the upper end of the control rod; The control shaft is rotatably mounted on the outer side of the upper end of the biopsy unit body; A first transmission gear and a second transmission gear are provided. The first transmission gear is located on the upper end of the control shaft, and the second transmission gear is located on the outer curved surface of the sleeve. The first transmission gear and the second transmission gear are meshed with each other and used to drive the control rod to rotate. A fastening ring, threadedly connected to the lower end of the control shaft, is used to lock and fasten the control shaft.

[0009] Preferably, a first control channel is provided at the top of the first groove, the control rod is movably connected to the inner wall of the first control channel, and the bottom of the control rod is rotatably connected to the bottom of the first groove.

[0010] Preferably, the top end of the control rod is integrally formed with an observation rod for observing the swing angle of the reamer, and the observation rod is distributed at an angle on the top end of the control rod.

[0011] Preferably, the biopsy device body has an opening groove on the outer side of its upper end, and the control shaft rotates in the middle of the opening groove.

[0012] Preferred, including: A baffle is pivotally disposed inside the lower end of the biopsy unit to block the opening at the lower end of the biopsy unit. The biopsy device body has a second groove on the lower inner wall. The baffle is rotatably connected to the upper outer side of the second groove. A second control channel is provided at the top of the second groove. A control rope is movably connected inside the second control channel. A pin is provided at the bottom of the control rope.

[0013] Preferably, a first pin ring is provided on the inner side of the baffle, and a second pin ring is provided at the bottom of the second groove. The pin rod is inserted vertically into the inner wall of the first pin ring and the second pin ring in sequence to limit and position the baffle.

[0014] Preferably, the upper end of the pin is slidably connected to a slide tube, and the slide tube is vertically disposed at the top of the second groove. The lower end of the pin is provided with a limit ring, the upper end of the limit ring is provided with a first spring, and the top of the first spring is disposed at the bottom of the slide tube. The second spring is provided inside the second groove, and the outer side of the second spring is disposed inside the lower end of the baffle, and the second spring is in a compressed state.

[0015] Preferably, a limiting platform is provided at the bottom edge of the second groove, and the inner side of the bottom of the baffle abuts against the outer side of the limiting platform. A pull ring for pulling the control rope is provided at the top of the control rope. A support rod is adhered to the inner wall of the upper end of the biopsy unit, and the control rope passes through and moves on the side end of the support rod.

[0016] A method for operating a biopsy instrument for spinal lesions: The following steps are included: S1: Use the puncture needle assembly to perform the puncture operation. Precisely puncture the puncture needle with the movable needle core to the predetermined position. After reaching the designated position, slowly pull out the movable needle core, then insert the Kirschner wire into the puncture needle, and then pull out the puncture needle. At this time, the Kirschner wire remains in the original position, which plays a precise guiding role for the subsequent entry of the biopsy extractor. S2: Select a biopsy body of appropriate size and insert it into the cone along the Kirschner wire. When the biopsy body reaches the predetermined position, start to rotate the first transmission gear. Through meshing, the first transmission gear will rotate. The rotation of the second transmission gear will then drive the sleeve to rotate. The rotation of the sleeve will then drive the control rod to rotate. Finally, the control rod will drive the reamer to swing out of the inner wall of the first groove. S3: After the reamer swings out of the inner wall of the first groove, it drives the reamer to swing and adjust different cutting depths through the meshing of the first transmission gear and the second transmission gear. The fastening ring is rotated to lock and fasten the control shaft. After the control shaft is locked and fastened, it will drive the reamer to maintain the required cutting depth. S4: Once the reamer has reached the required cutting depth, rotate the biopsy unit, which in turn rotates the reamer, thereby severing the part of the biopsy unit that is connected to the human tissue. After the severing operation is completed, slowly pull out the biopsy unit. At this point, the tissue sample inside the biopsy unit is successfully removed.

[0017] Compared with the prior art, the beneficial effects of the present invention are: The biopsy instrument of this invention avoids the problem of traditional biopsy forceps pushing against surrounding tissue during opening, which makes it difficult to accurately grasp the target lesion tissue. The biopsy instrument body directly penetrates into the vertebral body to obtain tissue, enabling more precise access to the lesion site and greatly improving the accuracy of sampling, providing doctors with a reliable basis for accurate diagnosis.

[0018] The reamer in this invention's biopsy unit can precisely sever the tissue inside the tube from the human tissue after the biopsy unit reaches a predetermined position, effectively solving the problem of tissue detachment during withdrawal of existing cylindrical hollow biopsy units. Simultaneously, the baffle design blocks the sample before the biopsy unit is withdrawn, further preventing the sample from loosening and slipping due to friction or vibration, ensuring the integrity and accuracy of the obtained tissue sample, and improving the reliability of pathological diagnosis.

[0019] The operating method of this invention, through the design of the transmission and control structures, enables precise control of the reamer's cutting depth and path. The surgeon can easily adjust and fix the reamer by rotating the transmission gear and the fastening ring, making operation simple and convenient. Simultaneously, the baffle is controlled via a pull ring and control rope, facilitating operation by the surgeon during surgery and improving surgical efficiency and stability. Attached Figure Description

[0020] The disclosure of this invention is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention. In the drawings, the same reference numerals are used to refer to the same parts. Wherein: Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a cross-sectional view of the overall structure of the present invention. Figure 1 ; Figure 3 This is a cross-sectional view of the overall structure of the present invention. Figure 2 ; Figure 4 This is a partial structural diagram at point A of the present invention; Figure 5 This is a partial cross-sectional view of the structure at point B of the present invention; Figure 6 This is a partial cross-sectional view of the structure at point C of the present invention; Figure 7 This is a schematic cross-sectional view of a partial structure at point D of the present invention.

[0021] Reference numerals: 1. Biopsy unit body; 101. First groove; 102. First control channel; 103. Control rod; 104. Sleeve; 105. Observation rod; 2. Reamer; 201. Opening groove; 202. Control shaft; 203. First transmission gear; 204. Second transmission gear; 205. Fastening ring; 3. Baffle; 301. Second groove; 302. Limiting platform; 303. Second control channel; 304. Control rope; 305. Pull ring; 306. Support rod; 307. Pin; 308. First pin ring; 309. Second pin ring; 310. Slide tube; 311. Limiting ring; 312. First spring; 313. Second spring. Detailed Implementation

[0022] It is readily understood that, based on the technical solution of this invention, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of the invention. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative examples of the technical solution of this invention and should not be considered as the entirety of the invention or as limitations or restrictions on the technical solution of this invention.

[0023] Specific embodiments of the present invention are described below with reference to the accompanying drawings.

[0024] Please see Figure 1 - Figure 4 This embodiment presents a biopsy instrument for spinal lesions, comprising a biopsy unit 1, a reamer 2, and a baffle 3. The biopsy unit 1 is generally cylindrical with a hollow internal structure. The inner diameter of the biopsy unit 1 is designed according to actual sampling needs, capable of accommodating a sufficient amount of spinal lesion tissue to provide ample samples for subsequent pathological analysis. The bottom of the biopsy unit 1 features an opening design, allowing tissue to smoothly enter the hollow cylinder, facilitating the sampling operation.

[0025] A first groove 101 is formed on the lower inner wall of the biopsy unit 1. A first control channel 102 is further formed at the top of the first groove 101, extending upwards to the upper end of the biopsy unit 1. A control rod 103 is movably connected to the inner wall of the first control channel 102. The bottom of the control rod 103 is rotatably connected to the bottom of the first groove 101 via a pivot. A reamer 2 is fixed to the lower outer curved surface of the control rod 103 by a key connection, and is housed in the first groove 101 in an arc shape. Its size matches the inner diameter of the hollow column of the biopsy unit 1. This design ensures that the sample inside the biopsy unit 1 will not be damaged during tissue cutting, thus guaranteeing the integrity and accuracy of the sample. A sleeve 104 is vertically rotatably connected to the upper inner wall of the biopsy unit 1 via a pivot, and the upper end of the control rod 103 is fixed to the inner wall of the sleeve 104 by a key connection. An observation rod 105 is integrally formed on the top of the control rod 103. The observation rod 105 is distributed at an angle on the top of the control rod 103. This design allows the operator to intuitively guide the swing angle of the reamer 2 through the observation rod 105, which improves the accuracy and convenience of operation.

[0026] Please continue reading. Figure 5 - Figure 7 An open slot 201 is provided on the outer side of the upper end of the biopsy unit 1. A control shaft 202 is rotatably connected to the middle of the open slot 201 via a rotating shaft. A first transmission gear 203 is keyed to the upper end of the control shaft 202. An external thread is provided on the outer curved surface of the lower end of the control shaft 202, and a fastening ring 205 for locking and securing the control shaft 202 is threaded to it. A second transmission gear 204 is meshed with the inner side of the first transmission gear 203. The second transmission gear 204 is bonded to the outer curved surface of the sleeve 104 and adopts a half-gear structure.

[0027] Two second grooves 301 are also formed on the lower inner wall of the biopsy unit 1, and these two second grooves 301 are symmetrically distributed on both sides of the lower inner wall of the biopsy unit 1. The baffle 3 is rotatably connected to the upper outer side of the second groove 301 by a pin, and the position of the reamer 2 is closer to the bottom opening of the biopsy unit 1 than the baffle 3. A limiting stage 302 is formed on the bottom edge of the second groove 301, and the bottom inner side of the baffle 3 abuts against the outer side of the limiting stage 302, thereby blocking and limiting the inner side of the baffle 3.

[0028] A second control channel 303 is formed at the top of the second groove 301, extending upwards to the upper end of the biopsy unit 1. A control rope 304 is movably connected inside the second control channel 303, and a pull ring 305 for pulling the control rope 304 is attached to its top. A support rod 306 is attached to the inner wall of the upper end of the biopsy unit 1, through which the control rope 304 passes and moves. The support rod 306 limits the pull ring 305, preventing it from shaking and affecting operation. A pin 307 is attached to the bottom of the control rope 304, a first pin ring 308 is attached to the inner side of the baffle 3, and a second pin ring 309 is attached to the bottom of the second groove 301. The pin 307 is vertically inserted into the inner walls of the first pin ring 308 and the second pin ring 309, respectively, to precisely limit and position the baffle 3 through the interaction of the pin 307 with the first pin ring 308 and the second pin ring 309. A slide tube 310 is slidably connected to the upper outer curved surface of the pin 307. The slide tube 310 is vertically bonded to the top of the second groove 301. The slide tube 310 provides vertical sliding limit for the pin 307, ensuring the stability of its movement. A limit ring 311 is bonded to the lower outer curved surface of the pin 307. A first spring 312 is connected to the upper end of the limit ring 311. The top of the first spring 312 is bonded to the bottom of the slide tube 310. The first spring 312, in conjunction with the limit ring 311, provides elastic support for the pin 307, allowing it to quickly return to its original position after being subjected to external force. A second spring 313 is bonded to the inner side of the second groove 301. The outer side of the second spring 313 is bonded to the inner side of the lower end of the baffle 3, and the second spring 313 is compressed. The second spring 313 provides elastic support for the baffle 3, providing power for its swing.

[0029] Please see Figure 1 -Figure 7 The operation method of this invention is as follows: First, perform the puncture procedure using the puncture needle assembly. Precisely insert the puncture needle, equipped with a movable stylet, to the designated location, typically at the medial border of the pedicle. Exercise extreme caution during this procedure to avoid entering the vertebral body. Once the designated location is reached, slowly withdraw the movable stylet. Then, insert a Kirschner wire into the puncture needle and withdraw it again. The Kirschner wire remains in its original position, providing precise guidance for the subsequent insertion of the biopsy extractor.

[0030] Next, a biopsy unit 1 of suitable thickness is selected and slowly and steadily inserted into the vertebral body along the Kirschner wire. Once the biopsy unit 1 reaches the predetermined position, the first drive gear 203 begins to rotate. As the first drive gear 203 rotates, it drives the second drive gear 204 to rotate through meshing. The rotation of the second drive gear 204 in turn drives the sleeve 104 to rotate, which in turn drives the control rod 103 to rotate. Finally, the control rod 103 drives the reamer 2 to swing out of the inner wall of the first groove 101.

[0031] After the reamer 2 swings out of the inner wall of the first groove 101, the meshing of the first transmission gear 203 and the second transmission gear 204 drives the reamer 2 to swing and adjust different cutting depths. When the reamer 2 is adjusted to the desired cutting depth, the fastening ring 205 is rotated. When the fastening ring 205 rotates, the force generated by the threaded connection moves upward along the outer curved surface of the control shaft 202. When the fastening ring 205 moves upward and abuts against the inner wall of the opening groove 201, it locks and tightens the control shaft 202. After the control shaft 202 is locked and tightened, it drives the reamer 2 to maintain the desired cutting depth, thereby achieving a stable cutting path and cutting depth for the reamer 2, ensuring the accuracy and reliability of the cutting operation.

[0032] Once the reamer 2 has reached the desired cutting depth, rotate the biopsy unit 1. As the biopsy unit 1 rotates, it simultaneously drives the reamer 2 to rotate, thereby severing the portion of the biopsy unit 1 that connects to the human tissue. After the severing operation is complete, slowly pull out the biopsy unit 1; at this point, the tissue sample inside the biopsy unit 1 has been successfully removed.

[0033] Simultaneously, before the biopsy unit 1 is pulled out of the vertebral body, the control rope 304 is pulled upwards via the pull ring 305. When the control rope 304 is pulled upwards, it causes the pin 307 to move linearly upwards along the inner wall of the slide tube 310. As the pin 307 moves linearly upwards, it pushes and compresses the first spring 312 through the limiting ring 311. At the same time, the lower end of the pin 307 is pulled out of the inner walls of the second pin ring 309 and the first pin ring 308 in sequence. After the lower end of the pin 307 is pulled out of the inner walls of the second pin ring 309 and the first pin ring 308, the limiting and positioning of the baffle 3 is released. After the limiting and positioning is released, the lower end of the baffle 3 will automatically swing towards the lower interior space of the biopsy unit 1 under the push of the elastic potential energy generated by the compression deformation of the second spring 313. This design ensures that the lower end of the baffle 3 blocks the sample inside the lower end of the biopsy unit 1, effectively preventing the sample from becoming loose and slipping out due to friction or vibration with surrounding tissues during the removal of the biopsy unit 1, thus preventing sample contamination and ensuring the quality and safety of the sample.

[0034] Secondly, after the biopsy unit 1 is successfully removed from the vertebral body, the baffle 3 is pushed inward to swing back to its original position, and the control rope 304 is pulled and then released. At this time, the pin 307, under the action of the first spring 312, will re-insert into the inner wall of the first pin ring 308 and the second pin ring 309 to limit and position the baffle 3, completing the repositioning operation of the baffle 3. This design avoids the baffle 3 obstructing the sample inside the biopsy unit 1, ensuring that the sample can be successfully removed, which facilitates subsequent pathological analysis.

[0035] The operation process of this invention is as follows: 1. Puncture guidance The patient should assume a suitable position, generally prone, to fully expose the spine and facilitate the doctor's procedure. The puncture site is routinely disinfected using a disinfectant such as povidone-iodine, working from the center outwards. After disinfection, a sterile drape is placed to ensure a sterile environment in the surgical area.

[0036] The doctor puts on sterile gloves, holds a puncture needle with a movable core, and slowly and steadily inserts the puncture needle to the predetermined position according to the pre-planned puncture path. This position is generally accurate to the medial edge of the pedicle. During this process, special care should be taken to avoid the puncture needle entering the vertebral body to avoid causing unnecessary damage.

[0037] Once the puncture needle reaches the designated position, the doctor must stabilize it and then slowly withdraw the movable stylet. At this point, a small amount of tissue fluid or blood may be observed flowing out; this is normal. Next, carefully insert the Kirschner wire into the puncture needle, ensuring it enters smoothly along the needle's pathway and is accurately positioned. Then, slowly withdraw the puncture needle, leaving the Kirschner wire in place to guide the subsequent biopsy extraction device.

[0038] 2. Biopsy device insertion and cutting After confirming that the selected biopsy unit 1 was of the appropriate size, the doctor wrapped it with sterile gauze and slowly inserted it into the vertebral body following the guidance of the Kirschner wire. During insertion, the patient's reaction and the condition of the puncture site should be closely observed, noting any bleeding, increased pain, or other abnormalities. Simultaneously, the speed and force of insertion should be controlled to ensure that the biopsy unit 1 reaches the intended position smoothly and accurately.

[0039] Once the biopsy unit 1 reaches the designated position, the doctor holds the biopsy unit 1 in place with one hand and begins to rotate the first transmission gear 203 with the other. As the first transmission gear 203 rotates, it clearly meshes with and drives the second transmission gear 204 to rotate. The rotation of the second transmission gear 204 then drives the sleeve 104 to rotate. The rotation of the sleeve 104 further drives the control rod 103 to rotate. Finally, the control rod 103 drives the reamer 2 to swing out of the inner wall of the first groove 101.

[0040] During the swing of the reamer 2, the doctor can visually guide the swing direction of the reamer 2 through the observation rod 105. According to the actual situation, the reamer 2 is precisely driven to swing and adjust different cutting depths through the meshing transmission of the first transmission gear 203 and the second transmission gear 204.

[0041] When the reamer 2 is adjusted to the required cutting depth, the doctor uses a special wrench or other tools to turn the fastening ring 205.

[0042] The force generated by the rotation of the fastening ring 205 causes it to move upward along the outer curved surface of the control shaft 202. When the fastening ring 205 moves upward and abuts against the inner wall of the opening groove 201, it locks and tightens the control shaft 202, thereby driving the reamer 2 to maintain the required cutting depth, achieving a stable cutting path and cutting depth, and ensuring that the target tissue can be accurately cut off.

[0043] After adjusting and fixing the cutting depth, the doctor holds the biopsy unit 1 with both hands and slowly and evenly rotates it. During rotation, the biopsy unit 1 synchronously drives the reamer 2 to rotate, and the cutting edge of the reamer 2 gradually severs the part of the biopsy unit 1 that is connected to the human tissue. At this time, the doctor should closely feel the change in rotational resistance; if the resistance suddenly decreases, it may indicate that the tissue has been successfully severed.

[0044] 3. Baffle 3 Operation and Sample Removal After the severing operation is completed, before removing the biopsy unit 1, the doctor stabilizes the biopsy unit 1 with one hand and pulls the control rope 304 upward through the pull ring 305 with the other hand. The control rope 304 drives the pin 307 to move upward linearly along the inner wall of the slide tube 310. When the pin 307 moves upward, it pushes and compresses the first spring 312. At the same time, the lower end of the pin 307 is pulled out of the inner wall of the second pin ring 309 and the first pin ring 308 in sequence, thereby releasing the limiting and positioning of the baffle 3.

[0045] At this time, the lower end of the baffle 3 automatically swings inward under the elastic potential energy generated by the compression deformation of the second spring 313, thus blocking the sample in the lower internal space of the biopsy unit 1. The doctor can observe the swing of the baffle 3 to ensure that the baffle 3 can effectively block the sample.

[0046] After confirming that the baffle 3 is effectively blocking the flow, the doctor slowly and steadily pulls out the biopsy unit 1. During the removal process, special care should be taken to avoid any violent friction or collision between the biopsy unit 1 and the surrounding tissue. With the removal of the biopsy unit 1, the internal tissue sample is successfully extracted.

[0047] After the biopsy unit 1 is successfully removed from the vertebral body, the doctor uses tweezers and other tools to push the baffle 3 inward to swing and reset it. At the same time, the control rope 304 is pulled and released, so that the pin 307 is reinserted into the inner wall of the first pin ring 308 and the second pin ring 309 to limit and position the baffle 3, so as to prevent the baffle 3 from obstructing the sample inside the biopsy unit 1 and making it difficult to remove the sample.

[0048] The technical scope of this invention is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this invention, and all such modifications and variations should fall within the protection scope of this invention.

Claims

1. A biopsy instrument for spinal lesions, characterized in that, include: Biopsy device body; A reamer, rotatably disposed inside the lower end of the biopsy unit, is used to cut and shred the tissue inside the biopsy unit. The first groove is formed at the lower end of the biopsy unit body for hiding and storing the reamer; A control lever, located inside the first groove and connected to the reamer, is used to drive the reamer to swing and adjust the cutting depth. An adjustment transmission mechanism is connected to the control lever and is used to drive the control lever to rotate and adjust.

2. The biopsy instrument for spinal lesions according to claim 1, characterized in that, The adjusting transmission mechanism includes: a sleeve disposed at the upper end of the control rod; The control shaft is rotatably mounted on the outer side of the upper end of the biopsy unit body; A first transmission gear and a second transmission gear are provided. The first transmission gear is located on the upper end of the control shaft, and the second transmission gear is located on the outer curved surface of the sleeve. The first transmission gear and the second transmission gear are meshed with each other and used to drive the control rod to rotate. A fastening ring, threadedly connected to the lower end of the control shaft, is used to lock and fasten the control shaft.

3. The biopsy instrument for spinal lesions according to claim 2, characterized in that, A first control channel is provided at the top of the first groove, and the control rod is movably connected to the inner wall of the first control channel, with the bottom of the control rod rotatably connected to the bottom of the first groove.

4. The biopsy instrument for spinal lesions according to claim 3, characterized in that, The top of the control lever is integrally formed with an observation rod for observing the swing angle of the reamer, and the observation rod is distributed at an angle on the top of the control lever.

5. The biopsy instrument for spinal lesions according to claim 4, characterized in that, An opening groove is provided on the outer side of the upper end of the biopsy device body, and the control shaft rotates in the middle of the opening groove.

6. The biopsy instrument for spinal lesions according to claim 1, characterized in that, include: A baffle is pivotally disposed inside the lower end of the biopsy unit to block the opening at the lower end of the biopsy unit. The biopsy device body has a second groove on the lower inner wall. The baffle is rotatably connected to the upper outer side of the second groove. A second control channel is provided at the top of the second groove. A control rope is movably connected inside the second control channel. A pin is provided at the bottom of the control rope.

7. The biopsy instrument for spinal lesions according to claim 6, characterized in that, A first pin ring is provided on the inner side of the baffle, and a second pin ring is provided at the bottom of the second groove. The pin rods are inserted vertically into the inner walls of the first and second pin rings in sequence to limit and position the baffle.

8. The biopsy instrument for spinal lesions according to claim 7, characterized in that, The upper end of the pin is slidably connected to a slide tube, and the slide tube is vertically arranged at the top of the second groove. The lower end of the pin is provided with a limit ring, and the upper end of the limit ring is provided with a first spring, and the top of the first spring is located at the bottom of the slide tube. The second spring is provided inside the second groove, and the outer side of the second spring is located inside the lower end of the baffle, and the second spring is in a compressed state.

9. The biopsy instrument for spinal lesions according to claim 8, characterized in that, A limiting platform is provided at the bottom edge of the second groove, and the inner side of the bottom of the baffle abuts against the outer side of the limiting platform. A pull ring for pulling the control rope is provided at the top of the control rope. A support rod is adhered to the inner wall of the upper end of the biopsy unit, and the control rope passes through and moves on the side end of the support rod.

10. The method for operating a biopsy instrument according to any one of claims 1-9, characterized in that, The following steps are included: S1: Use the puncture needle assembly to perform the puncture operation. Precisely puncture the puncture needle with the movable needle core to the predetermined position. After reaching the designated position, slowly pull out the movable needle core, then insert the Kirschner wire into the puncture needle, and then pull out the puncture needle. At this time, the Kirschner wire remains in the original position, which plays a precise guiding role for the subsequent entry of the biopsy extractor. S2: Select a biopsy body of appropriate size and insert it into the cone along the Kirschner wire. When the biopsy body reaches the predetermined position, start to rotate the first transmission gear. Through meshing, the first transmission gear will rotate. The rotation of the second transmission gear will then drive the sleeve to rotate. The rotation of the sleeve will then drive the control rod to rotate. Finally, the control rod will drive the reamer to swing out of the inner wall of the first groove. S3: After the reamer swings out of the inner wall of the first groove, it drives the reamer to swing and adjust different cutting depths through the meshing of the first transmission gear and the second transmission gear. The fastening ring is rotated to lock and fasten the control shaft. After the control shaft is locked and fastened, it will drive the reamer to maintain the required cutting depth. S4: Once the reamer has reached the required cutting depth, rotate the biopsy unit, which in turn rotates the reamer, thereby severing the part of the biopsy unit that is connected to the human tissue. After the severing operation is completed, slowly pull out the biopsy unit. At this point, the tissue sample inside the biopsy unit is successfully removed.

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