Orthopedic biopsy sampling device

Abstract

The invention discloses an orthopedic biopsy sampling device which comprises a sheath tube, a sampling head, an inner core, an operating handle, a telescopic sampling assembly and a telescopic adjusting assembly, the sampling head is arranged at one end of the sheath tube, the other end of the sheath tube is connected with the operating handle, and the inner core penetrates through the operating handle to be movably inserted into the sheath tube. The sampling assembly comprises a sampling head, a sampling opening sealing assembly is arranged in the sampling head, the sampling opening sealing assembly can controllably seal the open end of the sampling head, and bone tissue is reserved in the sampling head. The bone tissue sampling device has the advantages that the telescopic sampling head in the sheath tube is used for bone tissue sampling, and the spiral sampling blade in the sampling tube is used for fixing the bone tissue entering the sampling tube, so that the bone tissue is prevented from falling off from the sampling tube; the sampling opening sealing assembly at the end of the sampling tube is used for sealing the opening of the sampling tube after sampling, fixation of bone tissue in the sampling tube is enhanced, it is guaranteed that sampling is successful at a time, meanwhile, blood and flushing fluid are prevented from making contact with a sample, and the detection accuracy is guaranteed.

Description

Technical Field

[0001] The present invention specifically relates to an orthopedic biopsy sampling device. Background Art

[0002] A biopsy needle is a medical device, and its main function is to sample and aspirate the living tissue of tumors and unknown tumors in the body. The sample obtained through the biopsy needle can be used for cytological or pathological examinations to determine whether there is a tumor lesion, providing an important basis for the further treatment of the disease.

[0003] According to different users, biopsy needles can be divided into bone biopsy needles and tissue biopsy needles. The tissue biopsy needle is mainly used for puncturing and sampling soft tissues, and the bone biopsy needle is mainly used for extracting bone tissue from bones. Since bone is harder than other tissues in the human body, it is difficult for ordinary biopsy needles to obtain bone tissue from bones.

[0004] When the existing bone biopsy needle is used, first use the inner core to drill a hole in the bone, then pull out the inner core, and then insert the sampling end of the sheath tube into the drilled hole. During this process, some bone tissues will enter the hollow sampling end, and then pull out the sheath tube to complete the bone tissue sampling. The existing bone biopsy needle has the following problems when in use: 1. The operation is complex, the sampling time is long, and the sampling success rate is greatly affected by the operator's technical level. It is difficult to ensure a 100% success rate for each sampling. 2. During the sampling process, even if some bone tissues enter the sampling end, when the sheath tube is pulled out, the bone tissues will still fall off from the smooth sampling end, resulting in no bone tissue sample in the sampling end finally. 3. During the sampling process of the existing bone biopsy needle, the sample is easily in contact with blood and flushing fluid, affecting the detection accuracy. 4. The existing bone biopsy needle can only perform straight punctures and does not have an angle adjustment function, causing greater access damage to complex structures (such as the spine, joint space, and pelvis).

[0005] Therefore, there is a need for a sampling device that is easy to operate, has a high sampling success rate, can ensure the sampling success rate, and is suitable for puncturing and sampling complex bone tissues.

[0006] In Chinese Patent: CN201610337496.0, titled: Orthopedic Sampler for Medical Examination, it is recorded that it includes a drill rod with a drill bit at one end and a handle connected to the drill rod. The drill bit is a tubular structure, and a toothed protrusion is provided at the end of the drill bit. It is characterized in that: the other end of the drill rod is provided with a bone extraction tube. The bone extraction tube is a tubular structure matching the drill bit and is coaxially arranged with the drill bit. A plurality of barbs are annularly distributed on the inner wall of the bone extraction tube. The bottom of the barb is connected in a through hole opened on the wall of the bone extraction tube, and the top of the barb inclines towards the inner cavity of the bone extraction tube.

[0007] As shown in Patent CN201610337496.0, this patent mainly uses multiple barbs annularly distributed on the inner wall of the bone extraction tube to contact and limit the bone tissue, preventing the bone tissue from falling off from the bone extraction tube. The technical solution of this patent can improve the success rate of bone tissue sampling to a certain extent, but it has poor applicability to complex bone structures (cancellous bone / cortical bone). At the same time, this technical solution can only perform linear puncture and does not have an angle adjustment function, so its applicability to sampling of complex structures is poor. Summary of the Invention

[0008] The technical problem to be solved by the present invention is the problems of long sampling time, low sampling success rate, easy sample contamination and poor applicability to sampling of complex positions mentioned in the background art for the existing orthopedic biopsy sampling needles.

[0009] In view of the above technical problems, an orthopedic biopsy sampling device is proposed; it is realized through the following technical solutions: an orthopedic biopsy sampling device, including a sheath tube, a sampling head, an inner core and an operating handle. The sampling head is arranged at one end of the sheath tube, the other end of the sheath tube is connected to the operating handle, the inner core passes through the operating handle and is movably inserted into the sheath tube, and the end of the inner core cuts the bone to form a sampling opening for the sheath tube. Its characteristics are: it also includes a retractable sampling component and a telescopic adjustment component for controlling the telescopic movement of the sampling component. The sampling component is arranged at the sampling head at the end of the sheath tube, and the telescopic adjustment component is arranged in the operating handle and connected to the sampling component; The sampling component includes a sampling tube and spiral sampling blades arranged in the sampling tube for fixing bone tissue. The end of the sampling tube is provided with a sampling head, and a sampling opening sealing component is arranged in the sampling head. A sealing adjustment component is arranged in the operating handle, and the sealing adjustment component controls the sampling opening sealing component to close the opening end of the sampling head and retain the bone tissue in the sampling head.

[0010] Preferably for the technical solution of the present invention, a sealing sheet receiving groove is arranged on the sampling head, and the sampling opening sealing component can be retractably arranged in the sealing sheet receiving groove. Such a setting facilitates the telescopic movement of the sampling opening sealing component to control the closing of the sampling opening, preventing the bone tissue from falling off and also preventing blood and flushing fluid from contacting the sample, ensuring the accuracy of the detection.

[0011] Preferably for the technical solution of the present invention, the sampling opening sealing component includes a plurality of arc-shaped sealing sheets. The arc-shaped sealing sheets are arranged in the sealing sheet receiving groove, and the plurality of arc-shaped sealing sheets contact each other after extending out to close the opening end of the sampling head. A connecting pull tab is arranged on the arc-shaped sealing sheet, and the retraction of the arc-shaped sealing sheet in the sealing sheet receiving groove can be controllably adjusted by moving the connecting pull tab. Such a setting facilitates the control of the closing of the sampling opening, preventing the bone tissue from falling off and also preventing blood and flushing fluid from contacting the sample, ensuring the accuracy of the detection.

[0012] For the optimization of the technical solution of the present invention, a guiding block is provided on the outer wall of the sampling tube. The sampling tube cooperates with the telescopic adjustment assembly and the spiral guiding groove formed on the inner wall of the sheath tube through the guiding block. The telescopic adjustment assembly controls the spiral movement of the sampling tube at the end of the sheath tube. Such a setting facilitates controlling the rotation of the sampling tube while extending out of the sheath tube. The spiral sampling blade inside the sampling tube is used to fix the bone tissue, which is convenient for taking out the bone tissue for sampling, prevents the bone tissue from falling off from the sampling tube, and ensures the success rate of sampling.

[0013] For the optimization of the technical solution of the present invention, the telescopic adjustment assembly includes an adjustment tube and a flexible driving sleeve. The adjustment tube is arranged inside the sheath tube. One end of the flexible driving sleeve is connected to the adjustment tube. Rotating the flexible driving sleeve can drive the adjustment tube to rotate. The setting of the telescopic adjustment assembly facilitates controlling the spiral extension of the sampling tube, is convenient for sampling bone tissue, and is easy to use.

[0014] For the optimization of the technical solution of the present invention, a vertical guiding groove is provided on the adjustment tube to cooperate with the guiding block on the sampling tube. Rotating the adjustment tube can drive the sampling tube to move linearly along the vertical guiding groove. Such a setting facilitates controlling the spiral extension of the sampling tube out of the sheath tube, is convenient for the spiral sampling blade inside the sampling tube to fix the bone tissue, and is convenient for taking out the bone tissue for sampling.

[0015] For the optimization of the technical solution of the present invention, the sealing adjustment assembly includes an adjustment pull ring and a first worm and gear mechanism. The first worm and gear mechanism is arranged inside the operating handle. The adjustment pull ring is sleeved on the sampling tube. The first worm and gear mechanism is connected to the adjustment pull ring through a pull rope. The arc-shaped sealing piece in the sampling port sealing assembly is connected to the adjustment pull ring. The first worm and gear mechanism controls the movement of the adjustment pull ring through the pull rope to realize the control of the opening and closing of the opening end of the sampling head by the arc-shaped sealing piece. The setting of the sealing adjustment assembly facilitates controlling the opening and closing of the sampling port, prevents the bone tissue from falling off, and also prevents the blood and flushing liquid from contacting the sample, ensuring the accuracy of the detection.

[0016] For the optimization of the technical solution of the present invention, a bending assembly for adjusting the bending angle of the sampling head is further provided on the sheath tube. An angle adjustment assembly is arranged inside the operating handle. The bending assembly is connected to the angle adjustment assembly. The angle between the sampling head and the sheath tube can be controllably adjusted through the angle adjustment assembly and the bending assembly. The setting of the bending assembly facilitates adjusting the angle between the sampling head and the sheath tube, realizing the controllable bending of the sheath tube, being suitable for sampling at complex structures, and causing less damage to the patient.

[0017] For the optimization of the technical solution of the present invention, the bending assembly includes a plurality of bending bone rings hinged to each other. The angle adjustment assembly includes a second worm and worm gear mechanism. The second worm and worm gear mechanism is connected to the bending bone ring through a pull rope. Rotating the second worm and worm gear mechanism can drive the pull rope to move, realizing the control of the rotation of the bending bone ring along the hinge. The setting of the bending assembly facilitates the adjustment of the angle between the sampling head and the sheath tube, realizes the controllable bending of the sheath tube, is suitable for sampling at complex structures, and causes little damage to the patient.

[0018] For the optimization of the technical solution of the present invention, a cross universal joint is provided on the inner core. The inner core can be bent along the cross universal joint. The setting of the cross universal joint enables the inner core to be bent accordingly at the cross universal joint after the sheath tube is bent, and uses the cross universal joint to transmit the torque of the rotation of the inner core, ensuring that the inner core can drill holes in the bone normally and ensuring the normal use of the device.

[0019] The beneficial effects of the present invention compared with the prior art are as follows: In the technical solution of the present invention, a retractable sampling head provided in the sheath tube is used for sampling bone tissue. A spiral sampling blade is provided in the sampling tube. Through the spiral sampling blade, the bone tissue entering the sampling tube can be fixed, effectively preventing the bone tissue from falling off from the sampling tube. The sampling port sealing assembly provided at the end of the sampling tube is used to seal the opening of the sampling tube after sampling, further strengthening the fixation of the bone tissue in the sampling tube, effectively preventing the bone tissue from falling off from the sampling tube, ensuring the success of sampling at one time, and also preventing blood, flushing liquid from contacting the sample, ensuring the accuracy of detection. The bending assembly provided on the sheath tube is used to adjust the angle between the sampling head and the sheath tube, realizing the controllable bending of the sheath tube, being suitable for sampling at complex structures, causing little damage to the patient, and being convenient to use with strong versatility. Brief Description of the Drawings

[0020] Figure 1 Is a three-dimensional schematic of the present invention Figure 1 (excluding the bending assembly); Figure 2 Is a three-dimensional schematic of the present invention Figure 2 (including the bending assembly); Figure 3 Is a three-dimensional schematic of the present invention Figure 3 (Schematic diagram after the sheath tube is bent) Figure 4 Is a partial cross-sectional view of the sampling assembly; Figure 5 Is a schematic diagram at the sampling port sealing assembly; Figure 6 Is a schematic diagram after the sampling port sealing assembly seals the sampling port; Figure 7 Is a three-dimensional schematic of the sealing adjustment assembly; Figure 8 Schematic diagram of the telescopic adjustment component Figure 9 Front cross-sectional view before the sampling tube extends Figure 10 Rear cross-sectional view after the sampling tube extends Figure 11 Exploded view of the telescopic adjustment component after partial sectioning Figure 12 Schematic diagram of the bending component Figure 13 Exploded view of the handle (including the angle adjustment component and the seal adjustment component) Figure 14 Exploded view of the present invention (including the bending component) Explanation of reference numerals: 1 - sheath tube, 11 - sampling port seal assembly, 12 - arc-shaped seal piece, 13 - connecting pull tab, 2 - sampling assembly, 21 - sampling tube, 22 - sampling head, 23 - spiral sampling blade, 24 - seal piece storage groove, 25 - sampling port, 26 - guide block, 27 - spiral guide groove, 3 - inner core, 31 - triangular drill bit, 32 - drill rod, 33 - handheld end, 34 - spiral cutting rod, 35 - cross universal joint, 4 - operating handle, 41 - outer shell, 42 - inner core socket, 5 - telescopic adjustment component, 51 - adjustment tube, 52 - flexible drive sleeve, 53 - vertical guide groove, 54 - telescopic adjustment knob, 6 - seal adjustment component, 61 - adjustment pull ring, 62 - return spring, 63 - first worm and worm gear mechanism, 64 - outer sleeve ring, 65 - pull rope fixing ring, 66 - first pull rope, 67 - seal adjustment knob, 7 - bending component, 71 - bending bone ring, 72 - hinge piece, 73 - pull rope fixing port, 8 - angle adjustment component, 81 - second worm and worm gear mechanism, 82 - angle adjustment knob, 83 - second pull rope, 9 - flexible outer sleeve. Detailed implementation manners

[0021] Next, the technical solutions in the embodiments of the present invention will be described in detail in conjunction with the attached Figures 1 - 14 drawings of the embodiments of the present invention. Embodiment

[0022] As Figure 2 shown in 14 and

[0023] The sheath tube 1 includes a sampling head and a sampling assembly 2. The sampling head is located at one end of the sheath tube 1, and the sampling assembly 2 is arranged inside the sheath tube 1. The other end of the sheath tube 1 is fixedly connected to an operating handle 4. The inner core 3 passes through the operating handle 4 and is inserted into the sheath tube 1. A telescopic adjustment assembly 5 is arranged inside the operating handle 4 and is connected to the sampling assembly 2 inside the sheath tube 1. A sealing adjustment assembly 6 is arranged inside the operating handle 4 to control the opening of the sampling assembly 2.

[0024] The main function of the sheath tube 1 is to form a stable puncture channel and also serve as a carrier for the installation or movement of the sampling assembly 2 and the inner core 3.

[0025] The main function of the inner core 3 is to drill a hole in the bone, cut an opening for sampling for the sheath tube 1 on the bone, and facilitate the entry of the sampling assembly 2 in the sampling head of the sheath tube 1 for sampling.

[0026] The main function of the operating handle 4 is to be used for the installation of the sealing adjustment assembly 6 and the telescopic adjustment assembly 5, and also facilitate the fixation of the sheath tube 1 for convenient puncture sampling.

[0027] The main function of the sampling assembly 2 is to extend out from inside the sheath tube 1 and sample the bone tissue at the opening drilled by the inner core 3.

[0028] The main function of the telescopic adjustment assembly 5 is to control the telescoping of the sampling assembly 2 to facilitate the sampling of the sampling assembly 2.

[0029] The main function of the sealing adjustment assembly 6 is to control the opening and closing of the end opening of the sampling tube 21 in the sampling assembly 2, prevent the bone tissue entering the sampling tube 21 from falling off, and ensure the success rate of sampling.

[0030] As Figure 13 and 14 shown, the operating handle 4 is a rectangular block made of plastic. The whole operating handle 4 is composed of two hollow outer shells 41 symmetrically closed. There is a cavity in the middle after the two outer shells 41 are closed for installing the telescopic adjustment assembly 5 and the sealing adjustment assembly 6.

[0031] Regarding the connection between the sheath tube 1 and the operating handle 4, the end of the sheath tube 1 is inserted into the operating handle 4 and fixedly connected to the operating handle 4 with glue.

[0032] To facilitate the insertion of the inner core 3 through the operating handle 4 into the sheath tube 1, a circular socket is provided on the side of the operating handle 4. This socket is named the inner core socket 42. The inner core 3 passes through the operating handle 4 through this inner core socket 42 and is inserted into the sheath tube 1.

[0033] As Figure 2 、 4 、5、6、7 and 11 shown, the sheath tube 1 is a hollow tube made of stainless steel, and one end of the sheath tube 1 is connected to the operating handle 4.

[0034] The sheath tube 1 includes a sampling head, which is located at one end of the sheath tube 1 away from the operating handle 4, and a sampling assembly 2 is installed inside the sampling head of the sheath tube 1.

[0035] In order to facilitate understanding of the puncture depth of the sheath tube 1, scales representing the puncture depth are printed on the outer surface of the sheath tube 1, and users can understand the puncture depth in real time through the scales.

[0036] The sampling assembly 2 includes a sampling tube 21 and a sampling head 22. The sampling tube 21 is a circular hollow tube made of stainless steel. The outer diameter of the sampling tube 21 is the same as the inner diameter of the sheath tube 1. The sampling head 22 is located at the end of the sampling tube 21. In order to facilitate the sampling tube 21 to rotate into the bone through the sampling opening cut by the inner core 3 for sampling, the overall shape of the sampling head 22 is conical, and the outer diameter of the larger end of the sampling head 22 is slightly larger than the outer diameter of the body of the sampling tube. After the inner core 3 drills a hole in the bone and is pulled out from the sheath tube 1, the sampling head 22 on the sampling tube 21 first enters the sampling opening cut by the inner core 3, and the bone tissue enters the sampling tube 21 through the sampling port 25 at the end of the sampling head 22.

[0037] In order to improve the stability of the bone tissue entering the sampling tube 21 inside the sampling tube 21, a spiral sampling blade 23 is integrally fixed to the inner wall of the sampling tube 21. The end of the spiral sampling blade 23 is flush with the sampling port 25. When the sampling tube 21 rotates into the sampling opening, the spiral sampling blade 23 is spirally engaged with the bone tissue, further improving the stability of the bone tissue inside the sampling tube 21 and effectively preventing the bone tissue from falling off the sampling tube 21 when the sheath tube 1 is removed.

[0038] The setting of the spiral sampling blade 23 makes the whole device suitable for sampling of different bone structures, with strong applicability.

[0039] In order to further improve the stability of the bone tissue inside the sampling tube 21 after sampling, and at the same time prevent the sampled bone tissue from contacting with blood and flushing fluid, which may affect the detection effect, a sampling port sealing assembly 11 is also provided inside the sampling head 22 at the end of the sampling tube 21. Through the sampling port sealing assembly 11, the sampling port 25 can be closed, preventing the bone tissue from falling off the sampling tube 21 and also preventing the blood flushing fluid from contacting the sample, ensuring the detection effect.

[0040] The sampling port sealing assembly 11 includes 4 arc-shaped sealing pieces 12. The arc-shaped sealing pieces 12 are made of stainless steel with a certain elasticity. The sides of the 4 arc-shaped sealing pieces 12 are in contact with each other, and can form a conical sealing platform to realize the sealing of the sampling port 25.

[0041] For the convenience of installing the arc-shaped sealing piece 12, an arc-shaped sealing piece receiving groove 24 is provided in the sampling head 22. When not in use, the arc-shaped sealing piece 12 can be retracted into the sealing piece receiving groove 24 to ensure that the sampling port 25 is in an open state.

[0042] To facilitate the control of the opening and closing of the sampling port 25 by the sampling port sealing assembly 11, a rectangular connecting tab 13 is fixed on each arc-shaped sealing piece 12. The connecting tab 13 has a certain elasticity and is connected to the sealing adjustment assembly 6. Pulling the connecting tab 13 can pull the arc-shaped sealing pieces 12 that form the conical sealing platform back into the sealing piece receiving groove 24 respectively.

[0043] Regarding the process of the arc-shaped sealing pieces 12 forming the conical sealing platform: The arc-shaped sealing pieces 12 have a certain angle at the connection with the connecting tab 13. When the arc-shaped sealing pieces 12 extend from the sealing piece receiving groove 24, the sides of the 4 arc-shaped sealing pieces 12 are in contact with each other to form a conical sealing platform. When pulling the connecting tab 13, due to the certain elasticity of both the connecting tab 13 and the arc-shaped sealing pieces 12, the arc-shaped sealing pieces 12 are straightened and retracted into the sealing piece receiving groove 24. When the arc-shaped sealing pieces 12 extend from the sealing piece receiving groove 24, the four arc-shaped sealing pieces 12 return to their original states and are in contact with each other to form the sealing platform.

[0044] As Figure 6 、 7 As shown in 13, the sealing adjustment assembly 6 includes an adjustment pull ring 61, a return spring 62, and a first worm and worm gear mechanism 63. The adjustment pull ring 61 is sleeved on the sampling tube 21, and the end face of the adjustment pull ring 61 is connected to the connecting tab 13 in the sampling port closing assembly 11. The return spring 62 is sleeved on the sampling tube 21, with one end abutted against the end face of the sampling head 22 and the other end abutted against the adjustment pull ring 61.

[0045] The first worm and worm gear mechanism 63 is installed inside the operating handle 4. The first worm and worm gear mechanism 63 is connected to the adjustment pull ring 61 through a pull rope, named this pull rope the first pull rope 66. Pulling the first pull rope 66 can drive the adjustment pull ring 61 to slide on the sampling tube 21 towards the sampling port 25 end, thereby pushing the arc-shaped sealing piece 12 out of the sealing piece receiving groove 24 to complete the closing of the sampling port 25.

[0046] The overall shape of the adjustment pull ring 61 is the same as that of a bearing, including an inner ring and an outer sleeve ring 64. The inner diameter of the inner ring is slightly larger than the outer diameter of the sampling tube 21 body. The adjustment pull ring 61 can be sleeved on the sampling tube 21 and slide along the sampling tube 21. To guide the sliding of the adjustment pull ring 61 and prevent the inner ring of the adjustment pull ring 61 from rotating, a rectangular sliding groove is provided on the surface of the sampling tube 21. At the same time, a sliding block is welded correspondingly on the inner side wall of the inner ring of the adjustment pull ring 61, so that the adjustment pull ring 61 can slide linearly along the sliding groove on the sampling tube 21.

[0047] To facilitate the installation of the first drawstring 66, a drawstring fixing ring 65 is also fixed between the adjusting pull ring 61 and the rear end of the sampling head 22. The drawstring fixing ring 65 is a bearing. The inner ring of the drawstring fixing ring 65 is fixed on the outer surface of the sampling tube 21 and is in contact with the rear end face of the sampling head 22.

[0048] Definition: In this embodiment, the direction where the sampling port 25 is located is defined as the front, and the direction from the sampling port 25 to the operating handle 4 is defined as the rear.

[0049] To facilitate pulling the adjusting pull ring 61 to move through the first drawstring 66, and then driving the arc-shaped sealing piece 12 to move to complete the closing of the sampling port 25, a drawstring fixing point protrudes outward from the outer sleeve ring 64 on the adjusting pull ring 61. At the same time, a pulley for the first drawstring 66 to bypass is also fixed on the outer ring of the drawstring fixing ring 65. The first drawstring 66 passes through the pulley and is connected to the outer sleeve ring 64 on the adjusting pull ring 61. In this way, pulling the first drawstring 66 can drive the adjusting pull ring 61 to move upward, and then extend the arc-shaped sealing piece 12 out of the sealing piece receiving groove 24, thereby closing the sampling port 25.

[0050] The role of the pulley on the drawstring fixing ring 65 is to deflect the first drawstring 66. The pulley is not drawn in the figure and can be replaced by other structures that can achieve this effect.

[0051] Since the first drawstring 66 is located on the outer rings of the adjusting pull ring 61 and the drawstring fixing ring 65, when the sampling tube 21 rotates, the first drawstring 66 will not rotate with it, ensuring the stability of the first drawstring 66.

[0052] The first worm and worm gear mechanism 63 includes a worm gear, a worm, and a sealing adjustment knob 67. The worm gear and the worm are installed in the operating handle 4. One end of the first drawstring 66 is wound around the worm, and the other end is connected to the adjusting pull ring 61. One end of the worm passes through the operating handle 4 and is exposed outside. The sealing adjustment knob 67 is fixed on the worm at this end. Rotating the sealing adjustment knob 67 can drive the worm to rotate, thereby realizing the adjustment of the length of the first drawstring 66 and controlling the movement of the adjusting pull ring 61.

[0053] Regarding the process of controlling the sampling port sealing assembly 11 through the first worm and worm gear mechanism 63: In the normal state, the arc-shaped sealing piece 12 is received in the sealing piece receiving groove 24. When the sealing adjustment knob 67 is rotated, the first drawstring 66 is wound around the worm. At this time, the first drawstring 66 drives the adjusting pull ring 61 to move in the direction close to the sampling port 25 end, and then pushes the arc-shaped sealing piece 12 to extend out of the sealing piece receiving groove 24 to close the sampling port 25. At this time, the return spring 62 is compressed under force; When it is necessary to open the sampling port 25, rotate the sealing adjustment knob 67 in the reverse direction to loosen the first drawstring 66. At this time, the adjustment pull ring 61 moves and resets under the action of the return spring 62, and then pulls the arc-shaped sealing piece 12 back into the sealing piece storage groove 24, completing the opening of the sampling port 25.

[0054] As Figure 8 , 9 , 10 and 11 show that for the convenience of use in narrow positions, the sampling tube 21 can be controllably telescoped through the telescopic adjustment assembly 5 inside the sheath tube 1, and the sampling tube 21 can extend out of the sheath tube 1 to complete sampling.

[0055] The telescopic adjustment assembly 5 includes an adjustment tube 51 and a flexible drive sleeve 52. The adjustment tube 51 is a circular plastic tube, and the adjustment tube 51 is sleeved outside the sampling tube 21. One end of the flexible drive sleeve 52 is fixed inside the operating handle 4, and the other end is connected to the adjustment tube 51. A circular knob is fixed at one end of the flexible drive sleeve 52 inside the operating handle 4, and this knob is named the telescopic adjustment knob 54. Rotating the telescopic adjustment knob 54 can drive the adjustment tube 51 to rotate through the flexible drive sleeve 52.

[0056] The main function of the flexible drive sleeve 52 is to transmit torque. The flexible drive sleeve 52 is a woven flexible tube, and metal wires for transmitting torque are embedded inside it. The flexible drive sleeve 52 can be directly used as an existing device.

[0057] The adjustment tube 51 is a circular plastic tube, and the inner diameter of the adjustment tube 51 is the same as the outer diameter of the sampling tube 21. The adjustment tube 51 is sleeved outside the sampling tube 21. In order to facilitate driving the sampling tube 21 to extend out of the sheath tube 1 through the adjustment tube 51, two rectangular holes are opened on the outer wall of the adjustment tube 51 along the extension direction, and these holes are named vertical guide grooves 53. The vertical guide grooves 53 cooperate with the guide blocks 26 on the sampling tube 21, and the guide blocks 26 can directly pass through the vertical guide grooves 53.

[0058] In order to facilitate controlling the telescoping of the sampling tube 21 through the flexible drive sleeve 52 and at the same time enabling the sampling tube 21 to rotate (to facilitate the positioning of the spiral sampling blade and the sampled bone tissue), a spiral guide groove 27 that can cooperate with the guide block 26 is opened on the inner wall of the sheath tube 1 at the installation position of the adjustment tube. The guide block 26 on the sampling tube 21 cooperates with the spiral guide groove 27. When the telescopic adjustment knob 54 is rotated, the flexible drive sleeve 52 drives the adjustment tube 51 to rotate. Through the cooperation of the spiral guide groove 27, the guide block 26 and the vertical guide groove 53, the process of the sampling tube 21 extending out of the sheath tube 1 is a spiral extension.

[0059] As Figure 14As shown, the inner core 3 is a metal rod made of stainless steel. The inner core 3 includes a triangular drill bit 31, a drill rod 32, a spiral cutting rod 34, and a handheld end 33. The triangular drill bit 31 is located at one end of the drill rod 32, the spiral cutting rod 34 is located on the drill rod 32 near the triangular drill bit 31, and the handheld end 33 is located at the other end of the drill rod 32.

[0060] The drill rod 32 is made entirely of stainless steel metal. Its main function is to facilitate drilling holes in bones for bone tissue sampling. The triangular drill bit 31 is welded to the front end of the drill rod 32, and its main function is to cut through bone to facilitate drilling. The main function of the spiral cutting rod 34 is to cooperate with the triangular drill bit 31 to cut off bone chips on the bone for sampling the cut bone chips. The main function of the handheld end 33 is to facilitate holding.

[0061] To facilitate the triangular drill bit 31 to extend out of the sheath tube 1, the spiral cutting rod 34 needs to make way for the spiral sampling blade 23 in terms of size and specifications to ensure that the triangular drill bit 31 can smoothly penetrate and retract.

[0062] As Figure 1 、 3 As shown in 12 and 14, to facilitate sampling in complex structures (such as the spine, joint space, pelvic cavity) and reduce the approach injury, the present embodiment can also install a bending assembly 7 on the sheath tube 1. The bending assembly 7 is installed at the end of the sheath tube 1, near the sampling head. The angle of the sampling head can be adjusted through the bending assembly 7 to facilitate sampling at complex positions.

[0063] The bending assembly 7 includes a bending framework and an angle adjustment assembly 8 disposed in the operating handle 4 to drive the bending of the bending framework. The bending framework is disposed at the front end of the sheath tube 1 to connect the sampling head.

[0064] The bending framework is formed by sequentially connecting a plurality of coaxial bending bone rings 71 up and down. The bending bone ring 71 is a circular ring with a certain height. The inner diameter and outer diameter of the bending bone ring 71 are the same as those of the sheath tube 1. Both ends of the bending framework are fixedly connected to the sheath tube 1 and the sampling head.

[0065] On both the upper and lower circular end faces of the bending bone ring 71, two hinge platforms are convexly provided. These hinge platforms are named hinge pieces 72. Two adjacent bending bone rings 71 are connected together through the hinge pieces 72. The plurality of connected bending bone rings 71 can rotate along the hinge to achieve two-way bending, thereby driving the sampling head to bend two-way and realizing sampling at complex positions.

[0066] To control the bending of the bending framework, a second pull rope 83 is inserted into the pull rope fixing ports 73 provided on both the upper and lower end faces of each bending bone ring 71. Pulling the second pull rope 83 can drive the plurality of bending bone rings 71 to rotate along the hinge and approach each other in pairs, thereby realizing the control of the bending of the bending framework through the second pull rope 83.

[0067] Two lanyard fixing ports 73 are provided on both the upper end face and the lower end face of the bent bone ring 71. The two lanyard fixing ports 73 on the upper end face and the lower end face are distributed oppositely, and the positions of the upper end face and the lower end face correspond to each other in the vertical direction.

[0068] In order to control the bidirectional bending of the bent framework, the lanyard fixing ports 73 on the same side of multiple bent bone rings 71 are connected by a second lanyard 83. The lanyard fixing ports 73 on the other side distributed oppositely are connected pairwise by another second lanyard 83. The two second lanyards 83 are respectively connected to the second worm and gear mechanism 81 in the angle adjustment assembly 8. The control of the bidirectional bending of the bent framework is realized through the second worm and gear mechanism 81 and the second lanyard 83.

[0069] The angle adjustment assembly 8 is arranged in the operating handle 4 and includes a second worm and gear mechanism 81 and an angle adjustment knob 82. The second worm and gear mechanism 81 includes a worm and a worm gear. The worm and the worm gear are installed in the operating handle 4. The ends of the two second lanyards 83 are respectively wound around the worm, and the winding directions of the two second lanyards 83 are opposite. One end of the worm passes through the operating handle 4 and is exposed outside. The angle adjustment knob 82 is fixed on the worm at this end. Rotating the angle adjustment knob 82 can drive the worm to rotate, thereby realizing the adjustment of the length of the second lanyard 83 and the control of the bending of the bending assembly 7. And because the rotation directions of the two second lanyards 83 are opposite, rotating the angle adjustment knob 82 in different directions can realize the left and right different bendings of the bending assembly 7 in the horizontal direction.

[0070] In order to ensure the smoothness of the surface of the sheath tube 1 and facilitate puncture, a flexible sleeve made of plastic is sleeved outside the sheath tube 1. This sleeve is named the flexible outer sleeve 9. The surface of the flexible outer sleeve 9 is smooth, and the normal bending of the bending assembly 7 is not affected after the flexible outer sleeve 9 is sleeved on the sheath tube 1.

[0071] As Figure 14 shown, when the sheath tube 1 is bent, in order to facilitate the use of the inner core 3, a cross universal joint 35 is also correspondingly arranged on the drill rod 32 of the inner core 3. The cross universal joint 35 is an existing device and can be directly used. The bending adaptation of the drill rod 32 is realized through the cross universal joint 35, and at the same time, the force transmission can be realized to ensure normal drilling.

[0072] The usage process of this embodiment: When in use, first place the inner core 3 in the sheath tube 1, and then perform puncture under the action of CT. When reaching the designated position, rotate the inner core 3 to drill holes in the bone. After the drilling is completed, take out the inner core 3. The sampling tube 21 is controlled to extend through the telescopic adjustment assembly 5 (the length of the first lanyard 66 is manually adjusted to be longer during this process). After the sampling tube 21 extends out, bone sampling is performed, and then the sampling port is sealed through the sealing adjustment assembly 6. Then the sheath tube 1 can be pulled out to complete the sampling; When sampling at a complex location and the sheath 1 needs to be bent, first place the inner core 3 inside the sheath 1, then perform puncture under the action of CT. When reaching the position where bending is required, adjust the bending of the sheath 1 through the angle adjustment component 8, and then continue with the puncture or sampling.

[0073] The above embodiments are only for illustrating the technical idea of the present invention, and the protection scope of the present invention cannot be limited thereby. Any modification made on the basis of the technical solution according to the technical idea proposed by the present invention falls within the protection scope of the present invention.

Claims

1. An orthopedic biopsy sampling device, comprising a sheath tube (1), a sampling head, an inner core (3) and an operating handle (4), wherein the sampling head is arranged at one end of the sheath tube (1), the other end of the sheath tube (1) is connected to the operating handle (4), the inner core (3) passes through the operating handle (4) and is movably inserted into the sheath tube (1), the end of the inner core (3) cuts through bone to open a sampling opening for the sheath tube (1), and the device is characterized in that: It also includes a retractable sampling component (2) and a retractable adjustment component (5) for controlling the retractability of the sampling component (2); the sampling component (2) is arranged at the sampling head at the end of the sheath tube (1); and the retractable adjustment component (5) is arranged in the operating handle (4) and connected to the sampling component (2); The sampling assembly (2) comprises a sampling tube (21) and a spiral sampling blade (23) arranged in the sampling tube (21) for fixing bone tissue. A sampling head (22) is arranged at the end of the sampling tube (21). A sampling port sealing assembly (11) is arranged in the sampling head (22). A sealing adjustment assembly (6) is arranged in the operating handle (4). The sealing adjustment assembly (6) controls the sampling port sealing assembly (11) to close the open end of the sampling head (22) so as to retain the bone tissue in the sampling head (22).

2. The orthopedic biopsy sampling device according to claim 1, characterized in that: A sealing sheet receiving groove (24) is provided on the sampling head (22), and the sampling port sealing assembly (11) is retractably arranged in the sealing sheet receiving groove (24).

3. The orthopedic biopsy sampling device according to claim 2, characterized in that: The sampling port sealing assembly (11) comprises a plurality of arc-shaped sealing sheets (12), the arc-shaped sealing sheets (12) being arranged in a sealing sheet receiving groove (24), the plurality of arc-shaped sealing sheets (12) being extended to contact each other and seal the open end of the sampling head (22), a connecting pull tab (13) being arranged on the arc-shaped sealing sheet (12), and the convergence of the arc-shaped sealing sheet (12) in the sealing sheet receiving groove (24) being controllably adjustable by moving the connecting pull tab (13).

4. The orthopedic biopsy sampling device according to claim 1, characterized in that: A guide block (26) is provided on the outer wall of the sampling tube (21), and the sampling tube (21) cooperates with the telescopic adjustment component (5) and a spiral guide groove (27) starting from the inner wall of the sheath tube (1) through the guide block (26), and the telescopic adjustment component (5) controls the spiral movement of the sampling tube (21) at the end of the sheath tube (1).

5. The orthopedic biopsy sampling device according to claim 1, characterized in that: The telescopic adjustment assembly (5) comprises an adjustment tube (51) and a flexible drive sleeve (52); the adjustment tube (51) is arranged in the sheath tube (1); one end of the flexible drive sleeve (52) is connected to the adjustment tube (51); and rotating the flexible drive sleeve (52) can drive the adjustment tube (51) to rotate.

6. The orthopedic biopsy sampling device according to claim 5, characterized in that: A vertical guide groove (53) is provided on the adjustment tube (51) and cooperates with a guide block (26) on the sampling tube (21). Rotating the adjustment tube (51) can drive the sampling tube (21) to move linearly along the vertical guide groove (53).

7. The orthopedic biopsy sampling device according to claim 1, characterized in that: The sealing adjustment assembly (6) comprises an adjustment pull ring (61) and a first worm gear mechanism (63), wherein the first worm gear mechanism (63) is arranged in the operating handle (4), the adjustment pull ring (61) is sleeved on the sampling tube (21), the first worm gear mechanism (63) is connected to the adjustment pull ring (61) via a pull rope, the arc-shaped sealing sheet (12) in the sampling port sealing assembly (11) is connected to the adjustment pull ring (61), and the first worm gear mechanism (63) controls the movement of the adjustment pull ring (61) via the pull rope, thereby realizing the control of the arc-shaped sealing sheet (12) on the opening end of the sampling head (22) to open and close.

8. The orthopedic biopsy sampling device according to claim 1, characterized in that: A bending assembly (7) for adjusting the bending angle of the sampling head is also provided on the sheath tube (1), an angle adjustment assembly (8) is provided in the operating handle (4), the bending assembly (7) is connected to the angle adjustment assembly (8), and the angle between the sampling head and the sheath tube (1) is controllably adjustable via the angle adjustment assembly (8) and the bending assembly (7).

9. The orthopedic biopsy sampling device according to claim 8, characterized in that: The bending assembly (7) comprises a plurality of bending bone rings (71) hinged to each other, and the angle adjustment assembly (8) comprises a second worm gear mechanism (81). The second worm gear mechanism (81) is connected to the bending bone ring (71) via a pull rope, and rotation of the second worm gear mechanism (81) can drive the pull rope to move, thereby realizing control of the rotation of the bending bone ring (71) along the hinge.

10. The orthopedic biopsy sampling device according to claim 1, characterized in that: A cross universal joint (35) is arranged on the inner core (3), and the inner core (3) can be bent along the cross universal joint (35).

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