Biopsy needle

Abstract

The invention relates to the technical field of medical apparatuses and instruments, and discloses a biopsy needle which comprises a shell. The near end of the inner needle tube is connected with an inner tube seat, and the inner tube seat is movably arranged in the shell; the inner needle tube is sleeved with the outer needle tube, the near end of the outer needle tube is connected with an outer tube seat, and the outer tube seat is movably arranged in the shell; the rotating mechanism is arranged in the shell and comprises a driving assembly and a transmission assembly in transmission connection with the driving assembly; wherein after the inner tube seat and the outer tube seat are triggered to complete sampling, the inner tube seat and the outer tube seat are both connected with the transmission assembly; by operably driving the rotating mechanism for multiple times, multiple times of synchronous rotation of the inner tube base and the outer tube base can be achieved. According to the biopsy needle provided by the invention, the biopsy needle can be relatively conveniently rotated so as to obtain a target tissue sample thoroughly separated from human tissues, and meanwhile, the range of influence on the human tissues around the target tissue when the biopsy needle is rotated is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a biopsy needle. Background Art

[0002] In the current process of biopsy diagnosis, a puncture needle is needed to cut and separate human tissue for sampling and analysis. For biopsy needle sampling, the process is to first temporarily store the target tissue in the chamber formed by the inner needle tube and the needle core of the biopsy needle, then insert the cutting blade on the outer needle tube into the inner needle tube and cut off the temporarily stored target tissue, thereby obtaining a target tissue sample that is completely separated from the human tissue, and then pull out the needle body to complete the sampling.

[0003] During the sampling process, the cutting blade cannot completely cut off the target tissue when inserted into the inner needle tube for supplementary cutting. Due to tissue entanglement, the target tissue sample is pulled and damaged during the process of being removed. The target tissue sample may even fall out of the needle tube due to the pulling, resulting in sampling failure. Summary of the invention

[0004] The present application provides a biopsy needle that can improve the problem of pulling damage to the tissue during the sampling process caused by tissue involvement, and even the problem that the target tissue sample may fall out of the needle tube due to pulling, resulting in sampling failure.

[0005] The present application embodiment provides a biopsy needle, comprising:

[0006] case;

[0007] An inner needle tube, the proximal end of which is connected to an inner tube seat, and the inner tube seat is movably arranged in the shell;

[0008] An outer needle tube is sleeved outside the inner needle tube, the proximal end of the outer needle tube is connected to an outer tube seat, and the outer tube seat is movably arranged in the shell;

[0009] The rotating mechanism is arranged in the housing and includes a driving assembly and a transmission assembly connected to the driving assembly; wherein,

[0010] After the inner tube seat and the outer tube seat are fired to complete sampling, the inner tube seat and the outer tube seat are both connected to the transmission assembly; by operably driving the rotating mechanism multiple times, multiple synchronous rotations of the inner tube seat and the outer tube seat can be achieved.

[0011] In some embodiments, the transmission assembly includes:

[0012] a first transmission member, the first transmission member being transmission-connected to the driving assembly;

[0013] A transition piece, which can rotate around the axis direction of the inner needle tube, and both the inner tube seat and the outer tube seat are slidably connected to the transition piece along the axial direction of the inner needle tube;

[0014] A second transmission member, which is arranged between the first transmission member and the transition piece, and opposite ends of the second transmission member are respectively in transmission connection with the first transmission member and the transition piece; wherein,

[0015] The driving assembly can drive the transition piece to rotate sequentially through the first transmission member and the second transmission member, so as to realize the synchronous rotation of the inner tube seat and the outer tube seat around the axis direction of the inner needle tube.

[0016] In some embodiments, the driving assembly includes a pressing assembly and a sector gear, the pressing assembly is connected to the sector gear, and pressing the pressing assembly can drive the sector gear to rotate;

[0017] The first transmission member is provided with a first transmission gear and a second transmission gear, the first transmission gear is in transmission connection with the sector gear, one end of the second transmission member is provided with a third transmission gear, and the second transmission gear is in transmission connection with the third transmission gear.

[0018] In some embodiments, the driving assembly includes a rotating shaft connected to the housing, and the sector gear is rotatably connected to the rotating shaft.

[0019] In some embodiments, the pressing assembly includes a pressing member and an elastic member connected to each other, the pressing member is connected to the sector gear, and the elastic member is used for storing elastic potential energy when the pressing member is pressed, so as to drive the pressing member to reset when the pressing member is released.

[0020] In some embodiments, the rotating mechanism is arranged at the distal end of the housing, the housing is provided with an opening, and at least part of the pressing assembly extends to the outside of the housing through the opening.

[0021] In some embodiments, the biopsy needle includes an adjusting member, the adjusting member is movably connected to the housing, the adjusting member has a button located outside the housing, and the adjusting member is rotatably connected to the transition piece for adjusting the position of the transition piece in the axial direction of the inner needle tube.

[0022] In some embodiments, the housing is provided with a limiting hole, a plurality of limiting parts are arranged in the limiting hole, the plurality of limiting parts are arranged at intervals along the axial direction of the inner needle tube, the adjusting member includes a matching part, and the matching part can be respectively engaged with different limiting parts to adjust the position of the transition piece in the axial direction of the inner needle tube.

[0023] In some embodiments, the transition piece is provided with a slide groove, one end of the second transmission piece extends into the slide groove, and the second transmission piece can reciprocate in the slide groove along the axial direction of the inner needle tube, and at least one inner wall surface of the slide groove is in slidable contact with the second transmission piece to limit the second transmission piece from rotating around the axis of the inner needle tube relative to the transition piece.

[0024] In some embodiments, the rotating mechanism has a preset transmission ratio, and a single operation of the rotating mechanism can make the rotation angle of the inner tube seat and the outer tube seat in any rotation direction not less than 360°.

[0025] The biopsy needle provided in the embodiment of the present application has the beneficial effect that: since the rotating mechanism includes a driving assembly and a transmission assembly drivingly connected to the driving assembly, and after the inner tube seat and the outer tube seat are fired to complete sampling, the inner tube seat and the outer tube seat are both connected to the transmission assembly, and the rotating mechanism can be driven multiple times to achieve multiple synchronous rotations of the inner tube seat and the outer tube seat. Therefore, the biopsy needle can be rotated more conveniently by driving the rotating mechanism to perform a more thorough cutting of the target tissue to obtain a target tissue sample that is completely separated from the human tissue, which can improve the problem of pulling damage to the tissue caused by tissue involvement during the sampling process, and even the target tissue sample may fall out of the needle tube under pulling, resulting in sampling failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, 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 application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0027] Figure 1 is a schematic diagram of the structure of a biopsy needle in one of the embodiments of the present application;

[0028] Figure 2 yes Figure 1 A schematic diagram of the structure of the inner needle tube, the outer needle tube and the needle core in the biopsy needle shown;

[0029] Figure 3 yes Figure 1 A partial structural diagram of a biopsy needle is shown;

[0030] Figure 4 yes Figure 1 Schematic diagram of the internal structure of the biopsy needle (without sampling firing completed);

[0031] Figure 5 yesFigure 1 Schematic diagram of the internal structure of the biopsy needle shown (after the sampling firing is completed).

[0032] The meanings of the markings in the figure are as follows:

[0033] 100. Biopsy needle;

[0034] 00. Housing; 01. Opening; 02. Limit hole; 03. Limiting part;

[0035] 10. Inner needle tube; 11. Cutting hole;

[0036] 20. Inner tube seat;

[0037] 30. Outer needle tube; 31. Cutting blade;

[0038] 40. Outer tube seat;

[0039] 50. Rotating mechanism;

[0040] 51. Driving component; 511. Pressing component; 5111. Pressing piece; 5112. Elastic piece; 512. Sector gear; 513. Rotating shaft;

[0041] 52. First transmission part; 521. First transmission gear; 522. Second transmission gear;

[0042] 53. Transition part; 531. Boss; 532. Chute; 533. Stopping surface;

[0043] 54. Second transmission part; 541. Third transmission gear;

[0044] 60. Adjusting part; 61. Button; 62. Fitting part;

[0045] 70. Needle core;

[0046] 80. Lever;

[0047] 90. Firing spring. Detailed implementation manners

[0048] In order to make the objectives, technical solutions and advantages of the present application clearer and more understandable, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0049] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0050] In addition, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, the meaning of "a plurality" is two or more unless otherwise specifically defined.

[0051] Reference to "one embodiment", "some embodiments" or "embodiments" in the description of the present application means that a specific feature, structure or characteristic described in connection with that embodiment is included in one or more embodiments of the present application. Thus, statements such as "in one embodiment", "in some embodiments", "in other some embodiments", "in still other embodiments", etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. In addition, in one or more embodiments, specific features, structures or characteristics may be combined in any suitable manner.

[0052] To illustrate the technical solutions of the present application, the following will be described in conjunction with specific drawings and embodiments.

[0053] For biopsy needle sampling, the process is to first temporarily store the target tissue in the chamber formed by the inner needle tube and the needle core of the biopsy needle, and then insert the cutting blade on the outer needle tube into the inner needle tube and supplementarily cut the temporarily stored target tissue, so as to obtain a target tissue sample that is completely separated from the human tissue, and then pull out the needle body.

[0054] During the sampling process, when the cutting blade is inserted into the inner needle tube for supplementary cutting, the target tissue cannot be completely cut off. Due to tissue entanglement, the target tissue sample is pulled and damaged during the process of being taken out, and even the target tissue sample may come out of the needle tube under the pull, resulting in the problem of sampling failure.

[0055] To solve the above problems, an embodiment of the present application provides a biopsy needle.

[0056] Please refer to Figure 1 、 Figure 2 and Figure 3 , Figure 1 which is a schematic structural diagram of the biopsy needle 100 in one embodiment of the present application, Figure 2 is Figure 1 a schematic structural diagram of the inner needle tube 10, the outer needle tube 30 and the needle core 70 in the biopsy needle 100 shown in Figure 3 is Figure 1 a partial structural diagram of the biopsy needle 100 shown in

[0057] An embodiment of the present application provides a biopsy needle 100, which includes a housing 00, an inner needle tube 10, an outer needle tube 30, and a rotation mechanism 50.

[0058] A proximal end of the inner needle tube 10 is connected to an inner tube seat 20. The inner tube seat 20 is movably disposed within the housing 00, and the inner needle tube 10 can rotate synchronously with the inner tube seat 20. The inner needle tube 10 can be provided with cutting holes 11.

[0059] The outer needle tube 30 is sleeved outside the inner needle tube 10. A proximal end of the outer needle tube 30 is connected to an outer tube seat 40. The outer tube seat 40 is movably disposed within the housing 00, and the outer needle tube 30 can rotate synchronously with the outer tube seat 40. The outer needle tube 30 can be provided with cutting blades 31, and the cutting blades 31 are used to insert into the cutting holes 11 to cut the tissue within the inner needle tube 10.

[0060] The rotation mechanism 50 is disposed within the housing 00 and includes a driving component 51 and a transmission component that is in transmission connection with the driving component 51.

[0061] Please refer to Figure 4 and Figure 5 , Figure 4 which Figure 1 is a schematic internal structure diagram of the biopsy needle 100 (not completed sampling and firing) shown in Figure 5 and Figure 1 is a schematic internal structure diagram of the biopsy needle 100 (after completing sampling and firing) shown in

[0062] After the inner tube seat 20 and the outer tube seat 40 respectively move a preset stroke along the axial direction of the inner needle tube 10 to complete sampling and firing, by operably driving the rotation mechanism 50 multiple times, multiple synchronous rotations of the inner tube seat 20 and the outer tube seat 40 can be achieved.

[0063] Among them, after the inner tube seat 20 and the outer tube seat 40 are fired to complete sampling, both the inner tube seat 20 and the outer tube seat 40 are connected to the transmission component. The cutting blades 31 of the outer needle tube 30 are inserted into the cutting holes 11 of the inner needle tube 10. By operably driving the rotation mechanism 50 multiple times, multiple synchronous rotations of the inner tube seat 20 and the outer tube seat 40 can be achieved, so that the cutting blades 31 rotate around the axis of the inner needle tube 10 to perform secondary cutting on the sampled tissue, thereby being able to cut the target tissue more thoroughly to obtain a target tissue sample that is completely separated from the human tissue.

[0064] Understandably, considering that if the inner tube base 20 and the outer tube base 40 are both connected to the transmission assembly during the firing process, it is necessary to align and connect the moving inner tube base 20 and the outer tube base 40 to the transmission assembly, which is relatively difficult to operate and has high design requirements. Therefore, in order to reduce the design accuracy, before the inner tube base 20 and the outer tube base 40 are fired and the sampling is completed, the inner tube base 20 and the outer tube base 40 can also be both connected to the transmission assembly, that is, before and after the inner tube base 20 and the outer tube base 40 are fired and the sampling is completed, the inner tube base 20 and the outer tube base 40 are always connected to the transmission assembly.

[0065] Among them, during the firing and sampling process of the biopsy needle 100, first, the inner tube base 20 and the outer tube base 40 synchronously move a first preset stroke along the axis direction of the inner needle tube 10. During this process, the inner needle tube 10 realizes the first step of cutting the target tissue, so that the target tissue enters the inner needle tube 10. Then, the inner needle tube 10 stops moving, and the outer needle tube 30 continues to move a second preset stroke along the axis direction of the inner needle tube 10. During this process, the cutting blade 31 extends into the cutting hole 11 to realize the cutting of the target tissue in the inner needle tube 10. At this point, the sampling firing is completed.

[0066] Exemplarily, after the first driving of the rotating mechanism 50 to realize the first synchronous rotation of the inner tube base 20 and the outer tube base 40, the rotating mechanism 50 can be driven for the second time to realize the second synchronous rotation of the inner tube base 20 and the outer tube base 40. After the Kth driving of the rotating mechanism 50 to realize the Kth synchronous rotation of the inner tube base 20 and the outer tube base 40, the rotating mechanism 50 can be driven for the (K + 1)th time to realize the (K + 1)th synchronous rotation of the inner tube base 20 and the outer tube base 40, where K is a positive integer greater than or equal to 1.

[0067] For the biopsy needle 100 provided in the embodiment of the present application, since the rotating mechanism 50 includes a driving component 51 and a transmission component that is in transmission connection with the driving component 51, and after the inner tube base 20 and the outer tube base 40 are fired and the sampling is completed, the inner tube base 20 and the outer tube base 40 are both connected to the transmission component. By operably driving the rotating mechanism 50 multiple times, the multiple synchronous rotations of the inner tube base 20 and the outer tube base 40 can be realized. Therefore, the biopsy needle 100 can be rotated relatively conveniently by driving the rotating mechanism 50, and the target tissue can be cut more thoroughly to obtain a target tissue sample that is completely separated from the human tissue, which can improve the problem that the target tissue sample is pulled and damaged during the sampling process due to tissue entanglement, and even the target tissue sample may come out of the needle tube under the pull, resulting in sampling failure.

[0068] The biopsy needle 100 provided by the embodiment of the present application solves the problem that the traditional tube needle body cannot cut the sample thoroughly by integrating a flexible and convenient rotating mechanism 50 at the end, realizes more reliable sampling, strengthens the cutting effect between the cutting blade 31 of the outer needle tube 30 and the tissue to be cut, is conducive to the success of sampling, and can be rotated repeatedly as needed.

[0069] Optionally, the transmission assembly includes a first transmission member 52, a transition member 53, and a second transmission member 54. The first transmission member 52 is in transmission connection with the driving assembly 51; the transition member 53 can rotate around the axis direction of the inner needle tube 10, and both the inner tube seat 20 and the outer tube seat 40 are slidably connected to the transition member 53 along the axial direction of the inner needle tube 10; the second transmission member 54 is disposed between the first transmission member 52 and the transition member 53, and the opposite ends of the second transmission member 54 are respectively in transmission connection with the first transmission member 52 and the transition member 53.

[0070] Wherein, the driving assembly 51 can drive the transition member 53 to rotate through the first transmission member 52 and the second transmission member 54 in sequence, so as to realize the synchronous rotation of the inner tube seat 20 and the outer tube seat 40 around the axis direction of the inner needle tube 10.

[0071] By adopting the above scheme, the structure of the transmission assembly can be made relatively compact, thereby reducing the volume of the biopsy needle 100.

[0072] It should be noted that the transition member 53 is provided with a convex platform 531 and a stop surface 533. After the firing spring 90 pushes the outer tube seat 40 and the inner tube seat 20 to impact on the transition member 53, the outer tube seat 40 and the inner tube seat 20 will reach the transition member 53 at the same speed simultaneously until the inner tube seat 20 collides with the convex platform 531 of the transition member 53 and the movement stops. The inner tube seat 20 and the outer tube seat 40 move synchronously along the axis direction of the inner needle tube 10 for a first preset stroke to complete the preliminary cutting of the target tissue by the inner tube seat 20 driving the inner needle tube 10. The outer tube seat 40 continues to move forward for a certain distance under the action of inertia, and the outer needle tube 30 continues to move along the axis direction of the inner needle tube 10 for a second preset stroke until it touches the stop surface 533 of the transition member 53 and stops. The outer tube seat 40 drives the cutting blade 31 of the outer needle tube 30 into the cutting hole 11 of the inner needle tube 10 to complete the cutting of the target tissue.

[0073] Specifically, a small spring can be arranged between the outer tube seat 40 and the inner tube seat 20 to maintain the misalignment distance between the outer tube seat 40 and the inner tube seat 20. During the movement of the outer tube seat 40 and the inner tube seat 20 together, since the elastic force of the firing spring 90 is much higher than that of the small spring between the outer tube seat 40 and the inner tube seat 20, when the outer tube seat 40 and the inner tube seat 20 move, the outer tube seat 40, under the action of the small spring and the side buckle, maintains a staggered state of the relative position with the inner needle tube 10, that is, the cutting blade 31 of the outer needle tube 30 is inserted into the cutting hole 11 of the inner needle tube 10, reaching the state of cutting the target tissue, ensuring the reliability of sampling.

[0074] In this embodiment, the driving assembly 51 includes a pressing assembly 511 and a sector gear 512. The pressing assembly 511 is connected to the sector gear 512, and operating the pressing assembly 511 can drive the sector gear 512 to rotate; the first transmission member 52 is provided with a first transmission gear 521 and a second transmission gear 522. The first transmission gear 521 is in transmission connection with the sector gear 512, and one end of the second transmission member 54 is provided with a third transmission gear 541. The second transmission gear 522 is in transmission connection with the third transmission gear 541. With such a setting, the pressing is labor-saving and reliable, the operation is easy, and by driving the sector gear 512 to rotate through the pressing assembly 511, the transition member 53 can be driven to rotate through the first transmission member 52 and the second transmission member 54 in sequence, so as to realize the synchronous rotation of the inner tube seat 20 and the outer tube seat 40 around the axis direction of the inner needle tube 10. The structure is simple and convenient for processing.

[0075] Exemplarily, the first transmission gear 521 can be a cylindrical gear, and the second transmission gear 522 can be a bevel gear coaxially arranged with the cylindrical gear. The third transmission gear 541 can be a bevel gear.

[0076] Optionally, the driving assembly 51 includes a rotating shaft 513 connected to the housing 00, and the sector gear 512 is rotatably connected to the rotating shaft 513. With such a setting, it is convenient to rotatably arrange the sector gear 512 outside the housing 00.

[0077] In order to automatically reset the pressing assembly 511 and the sector gear 512 after operating the pressing assembly 511 to drive the sector gear 512 to rotate, optionally, the pressing assembly 511 includes a pressing member 5111 and an elastic member 5112 connected to each other. One end of the elastic member 5112 is connected to the sector gear 512, and one end is connected to the housing 00. The elastic member 5112 is used to store elastic potential energy when the pressing member 5111 is pressed, so as to drive the pressing member 5111 to reset when the pressing member 5111 is released. With such a setting, it can automatically reset the pressing assembly 511 and the sector gear 512 after operating the pressing assembly 511 to drive the sector gear 512 to rotate.

[0078] Exemplarily, please refer to Figure 4, when the pressing member 5111 is pressed, the pressing member 5111 drives the sector gear 512 to rotate around the rotation axis 513 in the direction indicated by the arrow N. At this time, the elastic member 5112 stores elastic potential energy, and both the inner needle tube 10 and the outer needle tube 30 rotate synchronously in the first direction; when the pressing member 5111 is released, the elastic member 5112 drives the pressing member 5111 to reset, and the pressing member 5111 drives the sector gear 512 to rotate around the rotation axis 513 in the direction indicated by the arrow M, and both the inner needle tube 10 and the outer needle tube 30 rotate synchronously in the second direction. The direction indicated by the arrow N and the direction indicated by the arrow M are opposite directions, and the second direction is opposite to the first direction. When the pressing member 5111 is released, the elastic member 5112 drives the pressing member 5111 to reset, and the pressing member 5111 can be pressed again to drive the sector gear 512 to rotate around the rotation axis 513 in the direction indicated by the arrow N. By repeating the above process, multiple synchronous rotations of the inner tube seat 20 and the outer tube seat 40 can be achieved, that is, the live inner needle tube 10 and the outer needle tube 30 can both rotate cyclically between the first direction and the second direction.

[0079] It should be noted that when the pressing member 5111 is released, the elastic member 5112 drives the pressing member 5111 to reset, and the pressing member 5111 drives the sector gear 512 to rotate around the rotation axis 513 in the direction indicated by the arrow M. The sector gear 512 is not engaged with the first transmission gear 521, which is an idle stroke. When the pressing member 5111 is pressed, the pressing member 5111 drives the sector gear 512 to rotate around the rotation axis 513 in the direction indicated by the arrow N, and the sector gear 512 is engaged with the first transmission gear 521 to achieve multiple synchronous rotations of both the inner needle tube 10 and the outer needle tube 30 in the first direction.

[0080] Among them, the elastic member 5112 can be a spring, a torsion spring, or elastic rubber, etc. The two ends of the elastic member 5112 are respectively connected to the housing 00 and the pressing member 5111.

[0081] Optionally, in order to facilitate the operator to operate the pressing assembly 511, the rotating mechanism 50 is arranged at the distal end of the housing 00. The housing 00 is provided with an opening 01, and at least part of the pressing assembly 511 extends to the outside of the housing 00 through the opening 01. With such a setting, the operator can drive the sector gear 512 to rotate by pressing at least part of the pressing assembly 511 that extends to the outside of the housing 00 through the opening 01.

[0082] Please refer to Figures 1 to 5 , in some of the embodiments, the biopsy needle 100 includes an adjusting member 60. The adjusting member 60 is movably connected to the housing 00. The adjusting member 60 has a button 61 located outside the housing 00. The adjusting member 60 is rotatably connected to the transition member 53 for adjusting the position of the transition member 53 in the axial direction of the inner needle tube 10.

[0083] By adopting the above solution, the position of the transition member 53 in the axial direction of the inner needle tube 10 can be adjusted, and further, the lengths of the inner needle tube 10 and the outer needle tube 30 inserted into the tissue to be cut can be adjusted, that is, the sampling length can be adjusted.

[0084] Optionally, the housing 00 is provided with a limiting hole 02, and a plurality of limiting portions 03 are arranged in the limiting hole 02. The plurality of limiting portions 03 are arranged at intervals in the axial direction of the inner needle tube 10. The adjusting member 60 includes a matching portion 62, and the matching portion 62 can be respectively engaged with different limiting portions 03 to adjust the position of the transition member 53 in the axial direction of the inner needle tube 10. With such a setting, the position of the transition member 53 in the axial direction of the inner needle tube 10 can be adjusted more conveniently.

[0085] Wherein, the limiting portion 03 can be a groove or a hole, and the matching portion 62 can be a block or a column. Or, the matching portion 62 can be a groove or a hole, and the limiting portion 03 can be a block or a column.

[0086] Optionally, the transition member 53 is provided with a sliding groove 532. One end of the second transmission member 54 extends into the sliding groove 532, and the second transmission member 54 can reciprocate in the sliding groove 532 in the axial direction of the inner needle tube 10. At least one inner wall surface of the sliding groove 532 is in slidable contact with the second transmission member 54 to limit the second transmission member 54 from rotating around the axis of the inner needle tube 10 relative to the transition member 53. With such a setting, the position of the transition member 53 in the axial direction of the inner needle tube 10 can be adjusted, and the second transmission member 54 can be prevented from rotating around the axis of the inner needle tube 10 relative to the transition member 53.

[0087] Exemplarily, the main body of the second transmission member 54 is a rod-shaped structure, and the third transmission gear 541 is connected to one end of the rod-shaped structure. The rod-shaped mechanism has a prismatic rod body, and the prismatic rod body is inserted into the sliding groove 532 of the transition member 53, so that the transition member 53 can move relatively on the prismatic rod body of the second transmission member 54, and the transition member 53 cannot rotate relative to the prismatic rod body.

[0088] The transition member 53 is provided with two guide rods, and the two guide rods are respectively inserted and matched with the holes on the inner tube seat 20 and the outer tube seat 40. The inner tube seat 20 and the outer tube seat 40 can both move relatively on the guide rods of the transition member 53. In this way, after firing, when the pressing assembly 511 is operated, its sector gear 512 will drive the first transmission gear 521 and the second transmission gear 522 to rotate. The second transmission gear 522 then drives the third transmission gear 541 to rotate. The second transmission member 54 drives the transition member 53 to rotate, and the transition member 53 drives the inner tube seat 20 and the outer tube seat 40 to rotate through its own guide rods, so as to realize the function of synchronous rotation of the inner needle tube 10 and the outer needle tube 30.

[0089] It should be noted that when the guide rod is relatively long along the length direction of the inner needle tube 10, before the inner tube base 20 and the outer tube base 40 are fired to complete sampling, both the inner tube base 20 and the outer tube base 40 can move relative to each other on the guide rod of the transition piece 53, that is, both the inner tube base 20 and the outer tube base 40 are connected to the transmission assembly.

[0090] Please refer to Figure 3 , in some of the embodiments, the rotating mechanism 50 has a preset transmission ratio. By operating the rotating mechanism 50 once, the rotation angle of the inner tube base 20 and the outer tube base 40 in any rotation direction is not less than 360°.

[0091] By adopting the above solution, the rotation angle of the inner needle tube 10 and the outer needle tube 30 in any rotation direction can be not less than 360°, so that the cutting blade 31 of the outer needle tube 30 can cut the tissue to be cut more thoroughly.

[0092] Optionally, the cutting blade 31 of the outer needle tube 30 is provided with a side cutting edge, and the root of the cutting blade 31 is strengthened to relieve the impact on the cutting blade 31 during rotation and reduce the risk of deformation.

[0093] Exemplarily, the preset transmission ratio of the rotating mechanism 50 can be specifically:

[0094] The transmission ratio between the sector gear 512 and the first transmission gear 521 is 1:8, and the transmission ratio between the second transmission gear 522 and the third transmission gear 541 is 1:2. That is, when the sector gear 512 is rotated 1 / 8 of a turn by operating it once, the second transmission gear 522 rotates 1 / 2 of a turn, and the third transmission gear 541 just drives the inner tube base 20 and the outer tube base 40 to rotate one full turn, that is, the rotation angle is 360°.

[0095] It can be understood that when the sector gear 512 is rotated more than 1 / 8 of a turn by operating it once, the rotation angle of the inner tube base 20 and the outer tube base 40 in any rotation direction is greater than 360°.

[0096] According to the space situation, the specific number of teeth is exemplified here as follows: the sector gear 512 has 40 teeth, the effective number of teeth cooperating with the first transmission gear 521 here is 5 teeth, the first transmission gear 521 has 10 teeth, the second transmission gear 522 has 24 teeth, and the third transmission gear 541 has 12 teeth.

[0097] It can be understood that the rotating mechanism 50 adopts gear transmission, which is labor-saving, reliable, easy to operate, and has good precision control for a 360° rotation with a small angle deviation.

[0098] Before the biopsy needle 100 provided in the above embodiment is loaded, the cutting blade 31 of the outer needle tube 30 is kept inserted into the cutting hole 11 of the inner needle tube 10, and the firing spring 90 is in a relaxed state. Before the biopsy needle 100 is inserted into the human body, it needs to be loaded. Specifically, by pulling the lever 80, the firing spring 90 can be compressed. When the buckle on the outer needle seat hooks the buckle position on the housing 00, the firing spring 90 is compressed in place, completing the loading operation.

[0099] After loading, the needle core 70 is in a protruding state, and the cutting blade 31 of the outer needle tube 30 disengages from the arc groove of the inner needle tube 10. Next, the gear operation can be performed. The adjusting member 60 can be toggled to adjust the gear required for the sampling length. The gear operation can also be performed before loading. Then, guided by the imaging device, the biopsy needle 100 provided in the embodiment of the present application is inserted into the human body and moved near the target tissue. After unlocking by toggling the self-locking key, the firing and sampling operation is performed.

[0100] The biopsy needle 100 provided in the embodiment of the present application supports two firing methods, and the principles are as follows:

[0101] First, in some CT (Computed Tomography) surgeries, the operator can puncture the biopsy needle 100 to the sampling position of the target tissue under the guidance of the CT image, and then press the firing button at the tail of the biopsy needle 100. The boss structure in this firing button will push open the buckle on the outer tube seat 40, causing it to disengage from the buckle position in the housing 00. At this time, the compressed firing spring 90 will release energy, converting the potential energy accumulated during the previous compression into kinetic energy, and pushing the outer tube seat 40 and the inner tube seat 20 to impact on the transition piece 53. There are a boss 531 and a stop surface 533 on the transition piece 53. A small spring is arranged between the outer tube seat 40 and the inner tube seat 20 to maintain the misalignment distance between the outer tube seat 40 and the inner tube seat 20. During the movement of the outer tube seat 40 and the inner tube seat 20 together, since the elastic force of the firing spring 90 is much higher than that of the small spring, when the outer tube seat 40 and the inner tube seat 20 move, the outer tube seat 40 and the inner tube seat 20 will reach the transition piece 53 at the same speed simultaneously until the movement stops when the inner tube seat 20 collides with the boss 531 of the transition piece 53. The inner tube seat 20 and the outer tube seat 40 move synchronously along the axial direction of the inner needle tube 10 by a first preset stroke, completing the preliminary cutting of the target tissue by the inner tube seat 20 driving the inner needle tube 10; the outer tube seat 40 continues to move forward a certain distance under the action of inertia, and the outer needle tube 30 continues to move along the axial direction of the inner needle tube 10 by a second preset stroke until it touches the stop surface 533 of the transition piece 53 and then stops. The cutting blade 31 of the outer tube seat 40 driving the outer needle tube 30 enters the cutting hole 11 of the inner needle tube 10, completing the cutting of the target tissue. At this time, under the action of the small spring and its side buckle, the outer tube seat 40 maintains a staggered state with respect to the relative position of the inner needle tube 10, that is, maintains the state where the cutting blade 31 of the outer needle tube 30 is inserted into the cutting hole 11 of the inner needle tube 10, ensuring the reliability of sampling.

[0102] Then, the Kth operation presses the pressing component 511 to drive the sector gear 512 to rotate, and then the transition piece 53 can be driven to rotate in sequence through the first transmission member 52 and the second transmission member 54, realizing the Kth synchronous rotation of the inner tube seat 20 and the outer tube seat 40, where K is a positive integer greater than or equal to 1;

[0103] Next, the (K + 1)th operation presses the pressing component 511 to drive the sector gear 512 to rotate, and then the transition piece 53 can be driven to rotate in sequence through the first transmission member 52 and the second transmission member 54, realizing the (K + 1)th synchronous rotation of the inner tube seat 20 and the outer tube seat 40.

[0104] Repeat the operation of pressing the pressing component 511 to drive the sector gear 512 to rotate until the target tissue is cut more thoroughly to obtain a target tissue sample that is completely separated from the human tissue.

[0105] In the second method, such as in some ultrasonic surgeries, the operator can also press the front firing button, which will link the tail firing button to repeat the movement process described in the first procedure to achieve firing sampling of the target tissue.

[0106] Then, the pressing assembly 511 is operated for the Kth time to drive the sector gear 512 to rotate, and the transition member 53 can be driven to rotate through the first transmission member 52 and the second transmission member 54 in sequence, so as to realize the Kth synchronous rotation of the inner tube seat 20 and the outer tube seat 40, where K is a positive integer greater than or equal to 1;

[0107] Next, the pressing assembly 511 is operated for the (K+1)th time to drive the sector gear 512 to rotate, which in turn drives the transition member 53 to rotate through the first transmission member 52 and the second transmission member 54, thereby achieving the (K+1)th synchronous rotation of the inner tube seat 20 and the outer tube seat 40.

[0108] The pressing assembly 511 is repeatedly operated to drive the sector gear 512 to rotate until the target tissue is cut more thoroughly, so as to obtain a target tissue sample that is completely separated from the human tissue.

[0109] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A biopsy needle, characterized in that, Comprising: A housing (00); An inner needle tube (10), a proximal end of the inner needle tube (10) is connected with an inner tube seat (20), and the inner tube seat (20) is movably arranged in the housing (00); An outer needle tube (30), sleeved outside the inner needle tube (10), a proximal end of the outer needle tube (30) is connected with an outer tube seat (40), and the outer tube seat (40) is movably arranged in the housing (00); A rotating mechanism (50), arranged in the housing (00), includes a driving component (51) and a transmission component in transmission connection with the driving component (51), wherein, After the inner tube seat (20) and the outer tube seat (40) are fired to complete sampling, both the inner tube seat (20) and the outer tube seat (40) are connected with the transmission component; by operably driving the rotating mechanism (50) multiple times, multiple synchronous rotations of the inner tube seat (20) and the outer tube seat (40) can be realized.

2. The biopsy needle according to claim 1, characterized in that, The transmission component includes: A first transmission member (52), the first transmission member (52) is in transmission connection with the driving component (51); A transition member (53), the transition member can rotate around the axis direction of the inner needle tube (10), and both the inner tube seat (20) and the outer tube seat (40) are slidably connected with the transition member (53) along the axial direction of the inner needle tube (10); A second transmission member (54), arranged between the first transmission member (52) and the transition member (53), and opposite ends of the second transmission member (54) are respectively in transmission connection with the first transmission member (52) and the transition member (53); wherein, The driving component can drive the transition member (53) to rotate sequentially through the first transmission member (52) and the second transmission member (54), so as to realize the synchronous rotation of the inner tube seat (20) and the outer tube seat (40) around the axis direction of the inner needle tube (10).

3. The biopsy needle according to claim 2, wherein The driving component (51) includes a pressing component (511) and a sector gear (512), the pressing component (511) is connected with the sector gear (512), and pressing the pressing component (511) can drive the sector gear (512) to rotate; The first transmission member (52) is provided with a first transmission gear (521) and a second transmission gear (522), the first transmission gear (521) is in transmission connection with the sector gear (512), and one end of the second transmission member (54) is provided with a third transmission gear (541), and the second transmission gear (524) is in transmission connection with the third transmission gear (541).

4. The biopsy needle according to claim 3, characterized in that, The driving component (51) includes a rotating shaft (513) connected with the housing (00), and the sector gear (512) is rotationally connected with the rotating shaft (55).

5. The biopsy needle according to claim 4, wherein, The pressing assembly (511) includes a pressing member (5111) and an elastic member (5112) connected to each other. The pressing member (5111) is connected to the sector gear (512). The elastic member (5112) is configured to store elastic potential energy when the pressing member (5111) is pressed, so as to drive the pressing member (5111) to reset when the pressing member (5111) is released.

6. The biopsy needle according to claim 3, wherein, The rotating mechanism (50) is disposed at the distal end of the housing (00). The housing (00) is provided with an opening (01), and at least a part of the pressing assembly (511) extends to the outside of the housing (00) through the opening (01).

7. The biopsy needle according to claim 2, characterized in that, The biopsy needle includes an adjusting member (60). The adjusting member (60) is movably connected to the housing (00). The adjusting member (60) has a button (61) located outside the housing (00). The adjusting member (60) is rotatably connected to the transition member, and is configured to adjust the position of the transition member (53) in the axial direction of the inner needle tube (10).

8. The biopsy needle according to claim 7, wherein, The housing (00) is provided with a limiting hole (02). A plurality of limiting portions (03) are arranged in the limiting hole (02). The plurality of limiting portions (03) are spaced apart along the axial direction of the inner needle tube (10). The adjusting member (60) includes a mating portion (62). The mating portion (62) can be respectively engaged with different limiting portions (03) to adjust the position of the transition member (53) in the axial direction of the inner needle tube (10).

9. The biopsy needle according to claim 7, characterized in that, The transition member (53) is provided with a sliding groove (532). One end of the second transmission member (54) extends into the sliding groove (532), and the second transmission member (54) can reciprocate in the sliding groove (532) along the axial direction of the inner needle tube (10). At least one inner wall surface of the sliding groove (532) is in slidable contact with the second transmission member (54) to limit the second transmission member (54) from rotating around the axis of the inner needle tube (10) relative to the transition member (53).

10. The biopsy needle according to any one of claims 1 to 9, characterized in that, The rotating mechanism (50) has a preset transmission ratio. By operating the rotating mechanism (50) once, the rotation angle of the inner tube seat (20) and the outer tube seat (40) in any rotation direction can be not less than 360°.

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