Minimally invasive device for bone tissue biopsy

Abstract

The invention discloses a bone tissue biopsy minimally invasive device which comprises a sampling assembly, a cutting assembly and a sleeve assembly, the sampling assembly comprises a sampling piece and a sampling handle installed on the sampling piece, the sleeve assembly comprises a sleeve arranged in the vertical direction and a handle arranged in the horizontal direction, the handle is installed at the top of the sleeve, and the cutting assembly is connected with the sleeve. The sampling piece extends into the sleeve, and the cutting assembly is installed at the bottom of the sleeve and connected with the sampling piece. The bone taking time can be remarkably shortened, trauma of the bone taking part is reduced, and meanwhile the efficiency and the curative effect of the autogenous bone grafting operation are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of orthopedic medical instruments, and in particular to a minimally invasive device for taking bone tissue biopsy. Background Art

[0002] Pathological diagnosis is intuitive and objective, and is the "gold standard" in clinical medical diagnosis. Biopsy, referred to as "biopsy", refers to the removal of diseased tissue from the patient's body by cutting, clamping, suction or puncture, and pathological examination for the need of diagnosis and / or treatment, providing important basis for disease diagnosis and subsequent treatment, prognosis assessment and efficacy evaluation. Among them, biopsy includes autologous iliac bone tissue biopsy, vertebral bone tissue biopsy, tumor bone metastasis biopsy, etc.

[0003] Autologous bone grafting is a commonly used auxiliary surgery in orthopedic surgery. In spinal surgery, autologous bone grafting can be used as a filler for intervertebral fusion devices, or it can be transplanted alone around the vertebral body to promote fusion of adjacent segments. In trauma surgery, autologous bone grafting can fill the bone defects at the transplant site, treat bone nonunion and delayed fracture healing, such as common tibia and fibula nonunion, clavicle nonunion, etc., and can also treat fractures with cancellous bone compression and articular surface collapse, such as calcaneal fractures, tibial plateau fractures, distal radius fractures, etc. Although there are many autologous bone replacement materials available for bone grafting in clinical applications, such as allogeneic bone, xenogeneic bone, artificial bone, etc., autologous bone comes from the recipient itself and contains osteoblasts, so it has unparalleled biocompatibility and osteogenic activity, is not prone to rejection, and can help restore the normal morphology and function of the bone in the transplant area in a short period of time. It is recognized as the best bone graft material and is also the most widely used in clinical applications. However, although autologous bone transplantation is widely used in orthopedic surgery, there is no surgical tool specifically used for autologous bone harvesting in clinical practice. Taking the most commonly used bone harvesting site, iliac bone harvesting, as an example, bone knives and scrapers are often used to harvest bones during surgery. The surgeon usually uses a hammer to hammer the bone knife to chisel through the cortical bone, mark the bone harvesting range, remove or open the cortical bone, and then use a scraper to scrape the required amount of cancellous bone near the anterior superior iliac spine. This bone harvesting method has many disadvantages. First, its window area, bone harvesting volume, and bone harvesting shape are often difficult to accurately control. Secondly, there is a risk of slippage, damage or compression of the peritoneum when the bone knife is chiseled, and there is a possibility of hanging through the contralateral cortical bone and damaging the organs when the scraper is scraped, and the incidence of bone harvesting-related complications is high. Accordingly, in order to obtain autologous bones of appropriate size, quantity and shape and reduce complications, bone harvesting needs to be performed carefully, in small quantities, and multiple times, which takes a lot of time. In addition, in order to expose a sufficient field of view, traditional bone harvesting methods usually require an incision of more than 3 cm, and the incidence of wound-related complications at the bone harvesting site after surgery is relatively high.

[0004] Intravertebral biopsy is based on removing a small tissue sample from the vertebral body for intraoperative and postoperative pathological identification. With the development and progress of minimally invasive spinal surgery and intraoperative fluoroscopy, intravertebral biopsy can now be performed percutaneously through the pedicles. It is widely used in percutaneous vertebroplasty and percutaneous kyphoplasty for the treatment of spinal fractures and has become the gold standard for the diagnosis of pathological spinal fractures. However, although intravertebral biopsy is very common in spinal surgery and some surgical tools specifically used for intravertebral biopsy have appeared in clinical practice, most of them are not ideal in actual application. Taking the biopsy tool for percutaneous vertebroplasty as an example, the most commonly used one is a hollow cylindrical metal straight tube with a serrated front end. First, the surgeon uses a puncture tool to establish a working channel through the pedicle to reach the vertebral body. Then, the surgeon slowly advances the biopsy tube through the pedicle. During the advancement, the tissue in the vertebral body enters the tube. When the front end of the tube reaches the appropriate depth or target lesion, the surgeon rotates the tube, and the front serrations shear the tissue inside the tube and the tissue outside the tube. Finally, the tube is withdrawn and the tissue taken from the tube is taken out for inspection. Although this type of biopsy tool is simple to operate, it can often only obtain a small amount of pathological tissue in clinical use. It is easy for tissue to remain in the vertebral body when the tube is pulled out, and ultimately the pathological tissue is not removed.

[0005] Tumor bone metastasis refers to the metastasis of certain malignant tumors originating outside bone tissue to bone tissue through the bloodstream. After colonization, new tumor lesions are gradually formed, destroying normal bone tissue, causing diseases with pain, hypercalcemia, pathological fractures, and nerve compression as the main manifestations. After statistical analysis, among common malignant tumors, breast cancer, prostate cancer, and thyroid cancer have the highest incidence of bone metastasis, about 60-75%, which is considered the first echelon. Lung cancer, kidney cancer, liver cancer, and malignant melanoma are second, about 20-45%. Digestive tract tumors such as gastric cancer, colorectal cancer, and gynecological tumors may also metastasize to the bone, and the incidence is generally less than 10%. In tumor bone metastasis, the spine is the most easily invaded part of the tumor. In clinical work, for pathological spinal compression fractures, it is often necessary to use percutaneous puncture instruments to obtain the diseased bone in the vertebral body for pathological section analysis to determine which primary tumor has metastasized from. However, the tool currently used in clinical practice is just an ordinary cannula. After the cannula is knocked into the vertebral body, it often cannot bring out the pathological tissue when it is pulled out, and it is impossible to effectively clamp the bone tissue, resulting in low diagnostic accuracy and high missed diagnosis rate.

[0006] Therefore, how to solve the above-mentioned deficiencies in the prior art has become a subject to be studied and solved by the present invention. Summary of the invention

[0007] In view of this, an object of the present invention is to provide a minimally invasive device for bone tissue biopsy.

[0008] In order to achieve the above object, the technical solution adopted by the present invention is:

[0009] A minimally invasive device for bone tissue biopsy comprises a sampling assembly, a cutting assembly and a sleeve assembly, wherein the sampling assembly comprises a sampling piece and a sampling handle mounted on the sampling piece, the sleeve assembly comprises a sleeve arranged in a vertical direction and a handle arranged in a horizontal direction, and the handle is mounted on the top of the sleeve; the sampling piece extends into the sleeve, the cutting assembly is mounted on the bottom of the sleeve, and the cutting assembly is connected to the sampling piece.

[0010] Furthermore, a threaded part is arranged on the inner wall of the sleeve.

[0011] Furthermore, the cutting assembly includes a cylindrical bone extractor, the wall thickness of which becomes thinner from top to bottom, and a plurality of bone extractor knives are sequentially installed on the inner wall of the bone extractor along the circumferential direction, and the bone extractor is arranged perpendicular to the inner wall of the bone extractor; the bone extractor is connected to the bottom of the sleeve, and the bone extractor is communicated with the sleeve.

[0012] Furthermore, a baffle is installed on one end of the sampling piece away from the sampling handle, and the sampling piece and the baffle both extend into the sleeve. The sampling piece is threadedly connected to the inner wall of the sleeve through the threaded piece, and moves up and down when the sampling piece rotates; the baffle is driven by the sampling piece to change its position. When the sampling piece is rotated to the top of the threaded piece, the baffle is located at the top of the bone extractor, and when the sampling piece is rotated to the bottom of the threaded piece, the baffle is located at the bottom of the bone extractor.

[0013] Furthermore, when the sampling member rotates clockwise, the baffle plate descends; when the sampling member rotates counterclockwise, the baffle plate ascends.

[0014] Furthermore, the cross-section of the handle is in the shape of an inverted triangle.

[0015] Furthermore, a pipe is provided inside the sleeve along the vertical direction, and a C-shaped pipe is provided at the bottom of the sleeve, and the pipe is connected to the C-shaped pipe; the cutting assembly includes a mosquito-repellent coil-like steel wire inner core, and the sampling piece is a steel wire inner core, and the steel wire inner core extends into the pipe and is rotated into the mosquito-repellent coil-like steel wire inner core at the C-shaped pipe.

[0016] Furthermore, the cross section of the sleeve along the horizontal direction is elliptical.

[0017] Furthermore, the cutting assembly includes a serrated septum, which is installed at the bottom of the sleeve, and the serrated septum divides the bottom of the sleeve into two.

[0018] Furthermore, the bottom edge of the sleeve is serrated.

[0019] Compared with the prior art, the advantages of the present invention are: the present invention is designed according to the commonly used size and shape of autologous bone harvesting, the depth and volume of bone harvesting are adjustable, the operation is simple, the design is compact, and it is suitable for various surgeries requiring autologous bone grafting such as spine and trauma. Compared with traditional bone harvesting with bone knives and scrapers, the bone harvesting is complete and beautiful, the bone harvesting depth is visible and quantifiable, the amount of bone harvested and the shape of bone harvested are easy to control, the bone harvesting process is safe, the required incision is smaller, the bone harvesting time can be significantly shortened, the trauma to the bone harvesting site is reduced, and the efficiency and efficacy of autologous bone grafting surgery are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Attached Figure 1 This is a schematic diagram of the structure of an embodiment of the present application;

[0022] Attached Figure 2 This is a schematic diagram of the cross-sectional structure of the bone extractor according to an embodiment of the present application;

[0023] Attached Figure 3 A schematic cross-sectional view of an embodiment of the present application;

[0024] Attached Figure 4 A schematic top view of an embodiment of the present application;

[0025] Attached Figure 5 This is a schematic diagram of the structure of the steel wire inner core of an embodiment of the present application;

[0026] Attached Figure 6 This is a schematic structural diagram of a mosquito coil-shaped steel wire inner core according to an embodiment of the present application;

[0027] Attached Figure 7 A schematic longitudinal cross-sectional view of an embodiment of the present application;

[0028] Attached Figure 8 It is a schematic cross-sectional view of an embodiment of the present application.

[0029] Description of reference numerals and components in the drawings:

[0030] 1. Sampling assembly; 11. Sampling piece; 12. Sampling handle; 13. Baffle; 14. Steel wire core; 15. Ring-shaped hand handle; 2. Cutting assembly; 21. Bone extractor; 22. Bone extractor; 23. Mosquito-repellent-coil-shaped steel wire core; 3. Sleeve assembly; 31. Sleeve; 32. Handle; 33. Thread; 34. T-shaped working sleeve; 35. Pipe; 36. C-shaped pipe; 4. T-shaped rotary handle; 5. Oval straight cylinder; 6. Septum; 7. Distal edge. DETAILED DESCRIPTION

[0031] The technical solution of the present invention will be clearly and completely described below through specific implementation methods. 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 creative work are within the scope of protection of the present invention.

[0032] See attached Figures 1 to 8 As shown, the present application proposes a minimally invasive device for bone tissue biopsy, including a sampling component 1, a cutting component 2 and a sleeve component 3. The sampling component 1 includes a sampling piece 11 and a sampling handle 12 installed on the sampling piece 11. The sleeve component 3 includes a sleeve 31 arranged in a vertical direction and a handle 32 arranged in a horizontal direction. The handle 32 is installed on the top of the sleeve 31, and the sampling piece 11 extends into the sleeve 31. The cutting component 2 is installed at the bottom of the sleeve 31, and the cutting component 2 is connected to the sampling piece 11.

[0033] Embodiment 1:

[0034] See attached Figure 1 and attached Figure 2As shown, the present application is designed according to the commonly used shape of autologous bone extraction, a thread 33 is provided on the inner wall of the sleeve 31, the sampling piece 11 is a push rod, and the push rod is threadedly connected to the sleeve 31 through the thread 33, the inner wall diameter of the sleeve 31 is 1 cm, and the thread 33 on the inner wall is 4 cm long. The sleeve 31 is connected below the cutting assembly 2, and the cutting assembly 2 includes a cylindrical bone extractor 21. The inner wall diameter of the bone extractor 21 at the lower end of the sleeve 31 is 1.6 cm and the height is 3 cm. A plurality of bone extractors 22 are sequentially installed along the circumferential direction on the inner wall of the bone extractor 21. There are 6 groups of bone extractors 22 in this embodiment. At the same time, the wall thickness of the bone extractor 21 gradually decreases from 1 mm to 0.3 mm from top to bottom. The blade width of the bone extractor 22 is 0.3 cm, the height is 3 cm, and the thickness is 0.3 mm. The bone cutter 22 is arranged perpendicular to the inner wall of the bone extractor 21, the cylindrical bone extractor 21 is connected to the bottom of the sleeve 31, and the bone extractor 21 is connected to the sleeve 31. In addition, in this embodiment, the upper end of the sleeve 31 is a handle 32 perpendicular to the sleeve 31, and the sleeve 31 is provided with a handle 32 on each side. The cross section of the handle 32 is an inverted triangle, the length is 5 cm, and the width of the upper plane is 1 cm. The handle 32 can be held by hand or hammered with a hammer.

[0035] A baffle 13 is installed on the end of the sampling member 11 away from the sampling handle 12. The baffle 13 has a diameter of 1 cm. The sampling member 11 and the baffle 13 are both inserted into the sleeve 31. The sampling member 11 is threadedly connected to the inner wall of the sleeve 31 through the thread 33. When the sampling member 11 rotates, it moves up and down. The baffle 13 is driven by the sampling member 31 to change its position. The push rod, that is, the central axis of the sampling member 31, also has a thread of 1 cm in length, which fits tightly with the thread 33 on the inner wall of the sleeve 31. When the push rod is rotated to the uppermost end, the baffle 13 is located at the top of the bone extractor 21. When it is rotated to the lowermost end, the baffle 13 is located at the bottom of the bone extractor 21, and its stroke is 3 cm. The sampling handle 12 has a diameter of 1 cm and a height of 3 cm. When the sampling handle 12 is rotated clockwise, the lower baffle 13 descends, and when the sampling handle 12 is rotated counterclockwise, the lower baffle 13 rises. The present application can slowly advance the bone extractor 21 by hammering the handle. The 6 sets of blades on the inner wall of the bone extractor 21 can cut the bone, making the advancement process smooth. When the baffle 13 blocks the advancement and prevents the bone from advancing, it means that the bone extraction depth has been reached. At this time, the rotating handle 32 can easily separate the transplanted bone before exiting, which is easy to operate. The bone extraction depth can be controlled by adjusting the height of the lower baffle 13 to avoid excessive bone extraction and penetration of the contralateral bone cortex and damage to the internal organs, which is safe to operate. The baffle 13 can also be advanced by rotating the sampling handle 12 clockwise, and then the transplanted bone can be pushed out, which is easy to operate. The opening surface of the bone extractor 21 is a circle with a diameter of 1.6 cm and an adjustable height of 3 cm, so that the removed transplanted bone is cylindrical with a bottom surface of a circle with a diameter of 1.6 cm and a height of 3 cm, which conforms to the shape and size of bone grafts commonly used in clinical practice. In some common bone defect sites, such as clavicle bone defects, it can be directly implanted without splicing. If the bone grafting site requires multiple matchstick-shaped grafts, the entire cylindrical bone can be divided into multiple matchstick-shaped small bones along the tangent line cut by the blade on the cylindrical bone. During the operation, the size and shape of the grafted bone can be selected according to the actual situation, and it can be flexible. The bone extractor 21 can be inserted into the surface of the bone cortex through a small incision, and the incision size can be controlled within 1.5 cm. The traditional bone extraction method usually requires an incision of more than 3 cm. Compared with the traditional method, the incision is significantly reduced, achieving a minimally invasive effect and reducing the incidence of wound-related complications at the bone extraction site after surgery.

[0036] The use process of this embodiment: Taking the most commonly used iliac bone extraction as an example, adjust the sampling handle 12 so that the baffle 13 is at an appropriate height to determine the depth of bone extraction, make an incision of about 1.5 cm at the anterior superior iliac spine, cut the skin, subcutaneous tissue, fascia, and periosteum in turn, insert the bone extractor vertically, and push the front against the cortical bone. Use a hammer to hammer the handle 32 to slowly advance until the baffle 13 reaches the cortical bone, rotate the handle 32 to separate the transplanted bone in the bone extractor, and withdraw the tool. Rinse the incision, and close the incision after sufficient hemostasis. Rotate the handle 32 clockwise to push the transplanted bone in the bone extractor. Scrape off the soft tissue on the cortical bone, adjust the shape of the transplanted bone according to the needs of the bone grafting site, and implant it into the site where bone grafting is required.

[0037] Embodiment 2:

[0038] See attached Figures 3 to 6 As shown, in view of the lack of dedicated tools for taking bone tissue from the vertebral body in clinical practice, combined with clinical experience, this embodiment proposes a method that can reach the vertebral body through percutaneous puncture, and by adjusting the depth of the inner core steel wire, a mosquito coil-like spiral structure is formed in front of the working sleeve to prevent the bone tissue in the sleeve from retreating, thereby ensuring the success rate of biopsy. The tool is simple and easy to operate, and is suitable for taking pathological tissue biopsies of vertebral bodies and other cancellous bone lesions. In this embodiment, the sleeve assembly 3 includes a T-shaped working sleeve 34, a pipe 35 is provided in the vertical direction inside the T-shaped working sleeve 34, a C-shaped pipe 36 is provided at the bottom of the T-shaped working sleeve 34, and the pipe 35 and the C-shaped pipe 36 are interconnected. The cutting assembly 2 includes a mosquito coil-like steel wire inner core 23, and the sampling piece is a steel wire inner core 14. The steel wire inner core 14 extends into the pipe 35 and is rotated into a mosquito coil-like steel wire inner core 23 at the C-shaped pipe 36. The operator inserts the steel wire core 14 from the top of the working sleeve 34 to the bottom of the sleeve 35. At this time, the steel wire core 14 is continued to be inserted. Since the steel wire core 14 has been pre-shaped, it will pass through the bottom of the T-shaped working sleeve 34 in the shape of a "mosquito-repellent coil" disc, and shuttle through the bone to form a spiral disc-shaped structure, cutting the bone tissue. Finally, after the T-shaped working sleeve 34 is pulled out, the bone tissue remaining in the T-shaped working sleeve 34 is received in the sleeve by the disc-shaped structure of the steel wire core 14, which is not easy to lose. After the device is moved outside the body, the steel wire core 14 is pulled out, the biopsy bone tissue is removed, and the surgical operation is completed. This embodiment can achieve percutaneous minimally invasive operation through the inner diameter of the working channel of the vertebral body strengthening instrument, or directly use the T-shaped working sleeve 34 for direct puncture, and the working sleeve is designed to be T-shaped, which is convenient for hammering to enter or exit, and is also convenient for manual rotation operation. In this embodiment, the internal design of the pipe 35 and the C-shaped pipe 36 at the bottom facilitates the insertion and extraction of the pre-shaped special steel wire inner core 14. The C-shaped pipe 36 and the pre-shaped steel wire inner core 14 have the same curvature, which facilitates the formation of the mosquito coil-shaped steel wire inner core 23. At the same time, the steel wire inner core 14 is designed with an annular hand-held handle 15 to facilitate the insertion and extraction of the steel wire inner core 14, and the steel wire inner core 14 is designed with a scale to facilitate the observation of the insertion depth of the steel wire inner core 14 in front of the working sleeve.

[0039] The use process of this embodiment is as follows: establish a working sleeve for vertebral augmentation surgery, i.e., vertebroplasty or kyphoplasty, or directly hammer in a T-shaped working sleeve 34, observe through perspective to see if the bottom of the sleeve reaches the vertebral pathological tissue, insert the pre-shaped steel wire inner core 14, observe the depth scale of the steel wire inner core 14 at all times, and observe through perspective to see if the leading edge of the steel wire forms a disc-shaped structure as planned. When the disc-shaped structure is formed, knock out the working sleeve, pull out the steel wire inner core 14, remove the pathological tissue, and send it for pathological testing.

[0040] Embodiment 3:

[0041] See attached Figure 7 and attached Figure 8 As shown, in this embodiment, the design is based on the most commonly used clinical method of taking vertebral bone tissue biopsy through the pedicle, and is divided from top to bottom into a T-shaped rotating handle 4 and an elliptical straight cylinder 5. The design of the elliptical straight cylinder 5 is better than the current circular straight cylinder design, and can better cut off the tissue inside the cylinder when the handle is rotated. Among them, there is a 1 cm high septum 6 at the distal end of the elliptical straight cylinder 5, which divides the distal elliptical straight cylinder 5 into two. The septum 6 can better cut the bone tissue inside the vertebral body when going deep, and can better cut off the tissue inside the cylinder when the handle is rotated. The distal edge 7 of the elliptical straight cylinder 5 is also serrated, which can help the device better cut the bone tissue inside the vertebral body when going deep.

[0042] The use process of this embodiment is as follows: after percutaneous pedicle puncture to establish the working channel, the working sleeve is inserted, and the device is placed in the working sleeve. The T-shaped handle is hit with a hammer to slowly advance the device. When the front end of the device reaches the appropriate position in the vertebral body, or when obvious resistance to advancement is felt, the T-shaped rotary handle 4 is rotated 270° to separate the tissue inside the tube from the tissue outside the tube. At this time, the anterior septum is perpendicular to the initial puncture, and the T-shaped rotary handle 4 is lifted to retract the device to obtain a pathological sample.

[0043] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A minimally invasive device for bone biopsy, characterized in that: The invention comprises a sampling component, a cutting component and a sleeve component. The sampling component comprises a sampling piece and a sampling handle installed on the sampling piece. The sleeve component comprises a sleeve arranged in a vertical direction and a handle arranged in a horizontal direction. The handle is installed on the top of the sleeve. The sampling piece extends into the sleeve. The cutting component is installed on the bottom of the sleeve. The cutting component is connected to the sampling piece.

2. A minimally invasive device for bone tissue biopsy according to claim 1, characterized in that: A threaded part is arranged on the inner wall of the sleeve.

3. A minimally invasive device for bone tissue biopsy according to claim 2, characterized in that: The cutting assembly includes a cylindrical bone extractor, the wall thickness of which becomes thinner from top to bottom, and a plurality of bone extractors are sequentially installed on the inner wall of the bone extractor along the circumferential direction, and the bone extractors are arranged perpendicular to the inner wall of the bone extractor; the bone extractor is connected to the bottom of the sleeve, and the bone extractor is communicated with the sleeve.

4. A minimally invasive device for bone tissue biopsy according to claim 3, characterized in that: A baffle is installed on one end of the sampling piece away from the sampling handle, and the sampling piece and the baffle both extend into the sleeve. The sampling piece is threadedly connected to the inner wall of the sleeve through the threaded piece, and moves up and down when the sampling piece rotates; the baffle is driven by the sampling piece to change its position. When the sampling piece is rotated to the top of the threaded piece, the baffle is located at the top of the bone extractor, and when the sampling piece is rotated to the bottom of the threaded piece, the baffle is located at the bottom of the bone extractor.

5. A minimally invasive device for bone tissue biopsy according to claim 4, characterized in that: When the sampling member rotates clockwise, the baffle plate descends; when the sampling member rotates counterclockwise, the baffle plate ascends.

6. The minimally invasive device for bone biopsy according to claim 1, characterized in that: The cross section of the handle is in an inverted triangle shape.

7. The minimally invasive device for bone biopsy according to claim 1, characterized in that: A pipe is provided inside the sleeve along the vertical direction, and a C-shaped pipe is provided at the bottom of the sleeve, and the pipe is connected to the C-shaped pipe; the cutting assembly includes a mosquito-repellent coil-shaped steel wire inner core, and the sampling piece is a steel wire inner core, and the steel wire inner core extends into the pipe and is rotated into the mosquito-repellent coil-shaped steel wire inner core at the C-shaped pipe.

8. The minimally invasive device for bone tissue biopsy according to claim 1, characterized in that: The cross section of the sleeve along the horizontal direction is elliptical.

9. The minimally invasive device for bone tissue biopsy according to claim 8, characterized in that: The cutting assembly includes a serrated septum, which is mounted on the bottom of the sleeve and divides the bottom of the sleeve into two parts.

10. The minimally invasive device for bone tissue biopsy according to claim 8, characterized in that: The bottom edge of the sleeve is serrated.

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