Biopsy taking device

Abstract

The utility model provides a biopsy taking device. The biopsy taking device comprises an outer tube and an inner tube capable of being arranged in the outer tube in a penetrating mode. The outer tube is provided with an embedded end, a first bent section and a first linear section, the embedded end is located at the far end of the outer tube, the first bent section is located between the embedded end and the first linear section, the first bent section is of a bent tubular structure, and the embedded end is used for being embedded into bone tissue; the first linear section is positioned at the near end of the outer tube; the far end of the inner tube is provided with a grabbing end, and the grabbing end can penetrate through the outer tube, extend out of the embedded end and is used for grabbing bone tissue. According to the biopsy taking device provided by the utility model, the first bending section is arranged on the outer tube, so that the detection range of bone tissue biopsy is enlarged, the grabbing end can conveniently grab bone tissues at special positions, the operation time is shortened, and the intake of rays to a human body is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a biopsy device. Background Art

[0002] For patients with spinal tumors or patients at risk of suspected spinal tumors, clinicians need to perform intraoperative biopsy to make a final pathological diagnosis, because intraoperative biopsy is the most accurate source of diagnostic information, so it is particularly important to be able to remove tumor tissue for biopsy during surgery. Since the cell structure of spinal tumors exists in three states: osteolytic, mixed, and osteoblastic, the hardness varies greatly, which leads to higher requirements for the use of tools. The most directly related factor to the biopsy retrieval rate is the location of the tumor. Sometimes when the tumor is close to the midline of the vertebral body or the posterior wall of the vertebral body, conventional biopsy tools cannot reach these locations. In addition, the usual treatment for spinal tumors is to fill them with bone cement, and the bone cement releases heat to kill tumor cells. Tumors in these locations are also difficult to deliver bone cement to.

[0003] At present, there are usually two types of biopsy tools used in vertebroplasty surgery. One is a forceps-like structure, such as a biopsy forceps with a clamp on the head, and the other is a tubular biopsy tool with teeth. However, both have certain disadvantages and limitations:

[0004] 1. For tumor tissue with slightly harder bone, such as osteoblastic and mixed spinal tumors, or younger spinal tumor patients, the use of biopsy forceps cannot extract the tumor tissue, and may even cause the head end of the forceps structure to collapse directly.

[0005] 2. The straight-in and straight-out toothed tubular biopsy tool can only perform biopsy in front of the channel, and the biopsy detection range is limited.

[0006] Therefore, how to improve the technical defects existing in the prior art is an urgent problem to be solved by those skilled in the art. Utility Model Content

[0007] The utility model aims to provide a biopsy device, which is convenient for grasping bone tissues at different positions, improves the success rate of biopsy and increases the applicability of the device.

[0008] To achieve the above-mentioned object, in a first aspect, the utility model provides a biopsy device, comprising an outer tube and an inner tube that can be inserted into the outer tube;

[0009] The outer tube has an embedding end, a first curved section and a first straight section, the embedding end is located at the distal end of the outer tube, the first curved section is located between the embedding end and the first straight section, the first curved section is a curved tubular structure, the embedding end is used to embed into bone tissue; the first straight section is located at the proximal end of the outer tube;

[0010] The distal end of the inner tube has a grasping end, which can pass through the outer tube and extend from the embedding end to grasp bone tissue.

[0011] In some embodiments, the gripping end includes at least two gripping claws, and the at least two gripping claws are arranged in a ring-shaped manner along the axis of the gripping end.

[0012] In some embodiments, the grasping end is in a restrained state when inside the outer tube, and the inner wall of the outer tube abuts against the grasping claws, so that the grasping claws are brought closer to each other;

[0013] When the grabbing end extends from the embedding end, the grabbing end is in an extended state.

[0014] In some embodiments, when the grabbing end is in the extended state, the angle between the grabbing claw and the axis of the grabbing end is 1-45°.

[0015] In some embodiments, a first cutting edge is formed on the inner side surface of the distal end of the grabbing claw.

[0016] In some embodiments, a second cutting edge is formed on the outer side surface of the distal end of the grabbing claw, so that the grabbing end is formed into a pointed structure.

[0017] In some embodiments, an inner groove is formed on the inner side of the grabbing claw, and each of the inner grooves is mutually surrounded to form an annular accommodation space for accommodating the excised bone tissue.

[0018] In some embodiments, one side wall of the grabbing claw is inclined toward the axis direction of the grabbing end, and the other side wall of the grabbing claw is inclined away from the axis direction of the grabbing end, so that the grabbing end forms a torsion structure.

[0019] In some embodiments, a distal end of one side wall of the grabbing claw intersects with a distal end of another side wall of the grabbing claw to form a tip structure.

[0020] In some embodiments, the distal end of the grabbing claw has a hook portion, and the hook portion is inclined toward the axial direction of the grabbing end.

[0021] In some embodiments, the angle between the hook portion and the axis of the grabbing end is d1, and 10°<d1<90°.

[0022] In some embodiments, the angle between the hook portion and the axis of the grabbing end is d2, and d2>90°.

[0023] In some embodiments, a third cutting edge is provided at the connection between the grabbing claw and the hook portion.

[0024] In some embodiments, both side walls of the grabbing claw are provided with a fourth cutting edge.

[0025] In some embodiments, the inner tube further comprises a second curved segment and a second straight segment, wherein the second curved segment is located between the grasping end and the second straight segment, and the second straight segment is located at the proximal end of the inner tube.

[0026] The beneficial effects of the biopsy device provided by the utility model are as follows:

[0027] 1. The outer tube has a first curved section, which can provide a curved grasping channel for the inner tube, making it convenient for the inner tube to take biopsies of bone tissues at different positions, such as the opposite side of bone tissues, thereby improving the biopsy rate, shortening the operation time, and reducing the radiation intake to the human body.

[0028] 2. A curved grasping channel is established through the outer tube. When the biopsy is completed, bone cement can also be filled through the outer tube, thus realizing the multi-purpose function of one device and improving the convenience of the operation.

[0029] 3. Since the outer tube has a first curved section, it can better adapt to the individual differences of patients, making the operation more precise and safer.

[0030] 4. The two side walls of the grabbing claw are respectively provided with fourth cutting edges. When the inner tube is rotated, the fourth cutting edges improve the reliability of the grabbing claw in cutting bone tissue.

[0031] 5. A tip structure is provided at the distal end of the grasping end to facilitate the grasping end to pierce into the bone tissue. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A schematic diagram of the structure of a biopsy device provided in an embodiment of the utility model;

[0033] Figure 2 A schematic diagram of the structure of the embodiment provided by the utility model using an outer tube to establish a curved grasping channel;

[0034] Figure 3 A schematic diagram of the structure of the biopsy device of the embodiment provided by the utility model when taking a biopsy;

[0035] Figure 4 A schematic diagram of the inner tube structure with two grabbing claws provided in the embodiment of the utility model;

[0036] Figure 5 A schematic diagram of the inner tube structure with three grab claws provided in the embodiment of the utility model;

[0037] Figure 6 for Figure 5 The enlarged view of point A in the middle;

[0038] Figure 7 A schematic diagram of the inner tube structure with six grab claws provided in the embodiment of the utility model;

[0039] Figure 8 for Figure 7 The enlarged view of point B in the middle;

[0040] Fig. 9 A schematic diagram of the structure of the grabbing claw of the embodiment provided by the utility model in an extended state;

[0041] Fig.10 A schematic diagram of a twisted structure of the gripping end of the inner tube in an embodiment provided by the utility model;

[0042] Fig.11 for Fig.10 Enlarged view of point C in the middle;

[0043] Fig.12 A schematic diagram of an embodiment of the utility model in which the gripping end of the inner tube is a twisted structure with a pointed tip;

[0044] Fig.13 for Fig.12 The enlarged view of point D in the middle;

[0045] Fig.14 A schematic diagram of the structure of a piercing hook portion provided on a grab claw of an embodiment provided by the utility model;

[0046] Fig.15 for Fig.14 Enlarged view of point E in the middle;

[0047] Fig.16 A schematic diagram of the angle formed between the hook portion and the axis of the grabbing end of the embodiment provided by the utility model;

[0048] Fig.17 The present invention provides a schematic structural diagram of an embodiment in which the hook portion is a barb type.

[0049] Reference numerals:

[0050] Outer tube 1, embedded end 11, first curved segment 12, first straight segment 13, inner tube 2, grasping end 21, grasping claw 211, first cutting edge 212, second cutting edge 213, inner groove 214, hook 215, third cutting edge 216, fourth cutting edge 217, second curved segment 22, second straight segment 23, bone tissue 3. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model. Unless otherwise defined, the technical terms or scientific terms used herein should be understood by people with general skills in the field to which the utility model belongs. "Including" and similar words used in this article mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects.

[0052] As used herein, the term "distal end" refers to the end that is away from the operator and closer to the patient; the term "proximal end" refers to the end that is closer to the operator and away from the patient.

[0053] refer to Figure 1 As shown, an embodiment of the utility model provides a biopsy device, comprising an outer tube 1 and an inner tube 2 that can be inserted into the outer tube 1. The outer tube 1 and the inner tube 2 are both hollow pipes, the outer tube 1 has an embedding end 11, a first curved section 12 and a first straight section 13, the embedding end 11 is located at the distal end of the outer tube 1, the first curved section 12 is located between the embedding end 11 and the first straight section 13, the first curved section 12 is a curved tubular structure, the embedding end 11 is used to embed into bone tissue, the first straight section 13 is located at the proximal end of the outer tube 1, and the proximal end of the first straight section 13 is used to hold or connect with an external holding structure. The inner tube 2 has a grasping end 21, the grasping end 21 is located at the distal end of the inner tube 2, the grasping end 21 can pass through the outer tube 1 and extend from the embedding end 11, and is used to grasp bone tissue.

[0054] refer to Figure 2 and Figure 3 As shown, in this embodiment, when the biopsy device is used to grab the bone tissue 3, a curved channel is established in advance through the outer tube 1, specifically, the embedding end 11 of the outer tube 1 is inserted into the bone tissue 3, and then the grasping end 21 of the inner tube 2 extends from the embedding end 11 of the outer tube 1 through the curved channel to grab the bone tissue 3. After the grasping end 21 grabs the bone tissue 3, the inner tube 2 is withdrawn from the outer tube 1 to bring back the grabbed part of the bone tissue 3.

[0055] It should be noted that the biopsy detection range of the tubular biopsy tool in the prior art is limited. When medical staff use the tubular biopsy tool in the prior art to take biopsy, in order to reach the target position, if they blindly increase the puncture abduction angle, there will be a risk of puncture. In this embodiment, by providing the first curved section 12 on the outer tube 1, the detection range of the biopsy of the bone tissue 3 is increased, and it is convenient for the grasping end 21 to grasp the bone tissue 3 in more positions, shortening the operation time and reducing the radiation intake to the human body. For example, after the embedded end 11 of the outer tube 1 is inserted into the human tissue, the embedded end 11 can be moved to the other side of the bone tissue 3 by continuing to push the outer tube 1, so as to achieve the biopsy of the opposite side of the bone tissue 3. In order to increase the biopsy volume, the present embodiment can also explore bone tissue multiple times and at multiple angles, that is, after taking a biopsy tissue at one angle, the biopsy tool is retracted, and the outer tube 1 is rotated to change the bending direction of entering the body to select a new direction to take biopsy tissue again. Multiple explorations realize the storage of biopsy tissues at different positions in the grasping end 21 of the inner tube 2.

[0056] In addition, in this embodiment, the bone tissue 3 is a vertebral body, and in other embodiments, the bone tissue 3 may be other bone tissue 3 in the human body that needs to be biopsied, such as a femur, a tibia, and the like.

[0057] In some embodiments, the grabbing end 21 has at least two grabbing claws 211 , and the at least two grabbing claws 211 are arranged in a ring-shaped manner along the axis of the grabbing end 21 .

[0058] like Figure 4 As shown, when the grasping end 21 is provided with two grasping claws 211 , the two grasping claws 211 are arranged at intervals in a ring shape along the axis of the grasping end 21 to form two grasping claws 211 that are symmetrically distributed.

[0059] like Figures 5 to 8 As shown, in some embodiments, the number of the grabbing claws 211 is set to 3 or 6, and each of the grabbing claws 211 is arranged in a ring shape and evenly spaced along the axis of the grabbing end 21 .

[0060] Of course, in some embodiments, the number of the grabbing claws 211 may be 4, 5 or more, which is not specifically limited here.

[0061] Furthermore, when there is no external force acting on the grasping end 21, each of the grasping claws 211 is in an expanded state, so that the specific structural feature of the grasping end 21 is a petal-shaped or trumpet-shaped structure.

[0062] Specifically, combined Fig. 9 As shown, when there is no external force acting on the grab claw 211, the angle between the grab claw 211 and the axis of the grab end 21 is a, and the value range of a is 1-45°.

[0063] In this embodiment, the grasping end 21 is in a restrained state when inside the outer tube 1, and the inner wall of the outer tube 1 abuts against the grasping claws 211, so that the grasping claws 211 are brought close to each other. When the grasping end 21 extends from the embedding end 11, the grasping end 21 is in an expanded state so that the grasping end 21 can grasp more bone tissue 3, and then the grasping claws 211 cut the bone tissue 3 by rotating the inner tube 2 to obtain a biopsy tissue, and then the inner tube 2 can be withdrawn, or the outer tube 1 can be moved forward to cover the inner tube 2, and then the inner tube 2 and the outer tube 1 are withdrawn together to complete the biopsy.

[0064] It should be noted that, after the grasping claw 211 grasps the bone tissue 3 and draws back the inner tube 2, the medical staff can also deliver bone cement to the target area through the outer tube 1 to kill the relevant tumor cells. It can be seen that the outer tube 1 realizes the function of multiple uses and improves the convenience of the operation.

[0065] Furthermore, in this embodiment, by rotating the inner tube 2, the grasping claw 211 is rotated to cut the bone tissue 3, so as to be suitable for cutting and grasping tumor tissue with slightly harder bone, thereby improving the applicability of the biopsy device.

[0066] refer to Figure 4 , Figure 6 and Figure 8 As shown, in some embodiments, the inner side surface of the distal end of the grab claw 211 is chamfered to form a first cutting edge 212 for cutting the bone tissue 3. The first cutting edge 212 is provided to improve the reliability of cutting the bone tissue 3.

[0067] refer to Figure 6 and Figure 8 As shown, in some embodiments, based on the first cutting edge 212 being provided on the inner side surface of the distal end of the grabbing claw 211, a second cutting edge 213 is provided on the outer side surface of the distal end of the grabbing claw 211, so that the grabbing end 21 is formed into a pointed structure.

[0068] In this embodiment, the first cutting edge 212 and the second cutting edge 213 are provided at the distal end of the grasping end 21 to form a tip structure, so that the grasping end 21 can easily penetrate into the bone tissue 3 .

[0069] In some embodiments, an inner groove 214 is formed on the inner side of the grabbing claw 211, and the inner groove 214 is close to the first cutting edge 212. The inner grooves 214 are mutually surrounded to form an annular accommodating space for accommodating biopsy tissue cut from bone tissue for biopsy.

[0070] In this embodiment, the inner groove 214 is provided to accommodate and seal the excised biopsy tissue, thereby preventing the biopsy tissue from slipping out of the grasping end 21 .

[0071] refer to Fig.10 and Fig.11 As shown, in some embodiments, the number of the grasping claws 211 is set to three, and one side wall of each grasping claw 211 is inclined toward the axis direction of the grasping end 21, and the other side wall of the grasping claw 211 is inclined away from the axis direction of the grasping end 21, so that the grasping end 21 is formed into a torsion structure. In this embodiment, by setting the grasping end 21 into a torsion structure, it is convenient to cut bone tissue.

[0072] In addition, in this embodiment, the first cutting edge 212 and the second cutting edge 213 may also be respectively provided on the inner and outer side surfaces of the front end of the grabbing claw 211 .

[0073] refer to Fig.12 and Fig.13 As shown, in other embodiments, the number of the grabbing claws 211 is also set to three, and the distal end of the grabbing end 21 is formed into a pointed structure. Specifically, one side wall of the grabbing claw 211 is defined as the first side wall, and the other side wall is defined as the second side wall, and the first side wall and the second side wall are two side walls arranged opposite to each other. Fig.11 On the basis of the gripping end 21 being a twisted structure, the first side wall of the gripping claw 211 is tilted toward the second side wall of the gripping claw 211, and the second side wall of the gripping claw 211 is tilted toward the first side wall of the gripping claw 211, until the distal end of the first side wall of the gripping claw 211 intersects with the distal end of the second side wall to form a pointed structure, so that the gripping end 21 is formed into a twisted structure with a pointed tip. In this embodiment, by setting the gripping end 21 into a twisted structure with a pointed tip, it is convenient for the gripping end 21 to pierce into bone tissue.

[0074] It should be noted that when the grabbing end 21 is set to a torsion structure or a torsion structure with a pointed end, the number of the grabbing claws 211 is preferably set to three or more, that is, the grabbing claws 211 can be 3, 4, 5, 6 or more.

[0075] refer to Fig.14 and Fig.15 As shown, in some embodiments, the distal end of the grabbing claw 211 has a hook portion 215 , and the hook portion 215 is inclined toward the axial direction of the grabbing end 21 .

[0076] Specifically, combined Fig.16As shown, there is an angle d between the hook portion 215 and the axis of the grabbing end 21. When the angle d between the hook portion 215 and the axis of the grabbing end 21 is equal to d1, and 10°<d1<90°, the hook portion 215 is a piercing structure. Fig.15 When the angle d between the hook portion 215 and the axis of the grab end 21 is equal to d2, and d2>90°, the hook portion 215 is a barbed hook structure, such as Fig.17 .

[0077] It should be noted that, whether the hook portion 215 is set to be a puncture type or a barb type, it is to increase the convenience of the grasping end 21 to explore forward, and to facilitate puncturing into the bone tissue 3. At the same time, because the hook portion 215 is inclined toward the axial direction of the grasping end 21, a certain gripping ability can be achieved, forming a receiving cavity that can store biopsy tissue, and preventing the biopsy tissue from falling off when the inner tube 2 is withdrawn.

[0078] Further, refer to Fig.15 As shown, the distal end of the hook portion 215 is set as a tip structure. Furthermore, a third cutting edge 216 is set at the connection between the grabbing claw 211 and the hook portion 215. By setting the third cutting edge 216, the grabbing end 21 has a better bone breaking effect when moving forward.

[0079] In some embodiments, reference Figure 6 As shown, fourth cutting edges 217 are further provided on both side walls of the grabbing claw 211 . The fourth cutting edges 217 are provided to facilitate the grabbing claw 211 to cut the bone tissue 3 when the inner tube 2 rotates.

[0080] In this embodiment, in order to ensure that the outer tube 1 and the inner tube 2 maintain the same shape after multiple uses, the outer tube 1 and the inner tube 2 are both made of a memory alloy material. For example, a nickel-titanium memory alloy can be selected.

[0081] In addition, in order to fit the outer tube 1, the inner tube 2 is also configured as a curved structure. Figure 5 As shown, the inner tube 2 further includes a second curved segment 22 and a second straight segment 23 . The second straight segment 23 is located at the proximal end of the inner tube 2 , and the second curved segment 22 is located between the grabbing end 21 and the second straight segment 23 .

[0082] In addition, the biopsy device provided by the utility model has universal applicability, and the utility model can also be used for other tissue locations in the body that require biopsy, and is not limited to bone tissue.

[0083] Although the embodiments of the present invention are described in detail above, it is obvious to those skilled in the art that various modifications and variations can be made to these embodiments. However, it should be understood that such modifications and variations are within the scope and spirit of the present invention. Moreover, the present invention described herein may have other embodiments and may be implemented or realized in a variety of ways.

Claims

1. A biopsy device, characterized in that: It comprises an outer tube and an inner tube which can be inserted into the outer tube; The outer tube has an embedding end, a first curved section and a first straight section, the embedding end is located at the distal end of the outer tube, the first curved section is located between the embedding end and the first straight section, the first curved section is a curved tubular structure, the embedding end is used to embed into bone tissue; the first straight section is located at the proximal end of the outer tube; The distal end of the inner tube has a grasping end, which can pass through the outer tube and extend from the embedding end to grasp bone tissue.

2. The biopsy device according to claim 1, characterized in that: The gripping end comprises at least two gripping claws, and the at least two gripping claws are arranged in a ring-shaped manner along the axis of the gripping end.

3. The biopsy device according to claim 2, characterized in that: When the grabbing end is in the outer tube, it is in a restrained state, and the inner wall of the outer tube abuts against the grabbing claws, so that the grabbing claws are brought closer to each other; When the grabbing end extends from the embedding end, the grabbing end is in an extended state.

4. The biopsy device according to claim 3, characterized in that: When the grabbing end is in the extended state, the angle between the grabbing claw and the axis of the grabbing end is 1-45°.

5. The biopsy device according to claim 2, characterized in that: The inner side surface of the distal end of the grabbing claw is provided with a first cutting edge.

6. The biopsy device according to claim 5, characterized in that: A second cutting edge is formed on the outer side surface of the distal end of the grabbing claw, so that the grabbing end is formed into a pointed end structure.

7. The biopsy device according to claim 2, characterized in that: An inner groove is formed on the inner side surface of the grabbing claw, and each inner groove is mutually surrounded to form an annular accommodation space for accommodating the excised bone tissue.

8. The biopsy device according to claim 2, characterized in that: One side wall of the grab claw is inclined toward the axis direction of the grab end, and the other side wall of the grab claw is inclined toward the axis direction away from the grab end, so that the grab end forms a torsion structure.

9. The biopsy device according to claim 8, characterized in that: A distal end of one side wall of the grab claw intersects with a distal end of another side wall of the grab claw to form a tip structure.

10. The biopsy device according to claim 2, characterized in that: The distal end of the grabbing claw has a hook portion, and the hook portion is arranged obliquely toward the axial direction of the grabbing end.

11. The biopsy device according to claim 10, characterized in that: The included angle between the hook portion and the axis of the grabbing end is d1, and 10°<d1<90°.

12. The biopsy device according to claim 10, characterized in that: The angle between the hook portion and the axis of the grabbing end is d2, and d2>90°.

13. The biopsy device according to claim 10, characterized in that: A third cutting edge is provided at the connection between the grabbing claw and the hook portion.

14. The biopsy device according to claim 2, characterized in that: Both side walls of the grabbing claw are provided with fourth cutting edges.

15. The biopsy device according to claim 1, characterized in that: The inner tube further includes a second curved segment and a second straight segment, wherein the second curved segment is located between the grasping end and the second straight segment, and the second straight segment is located at the proximal end of the inner tube.

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