A kidney biopsy device for live examination

Abstract

This invention belongs to the field of renal puncture technology, specifically referring to a renal puncture device for biopsy, comprising a crank assembly, a connecting rod assembly, a variable precision drive assembly, a lifting puncture assembly, a sampling pump, a biaxial platform, and a slide plate. The slide plate is mounted on the biaxial platform, the crank assembly and the variable precision drive assembly are mounted on the slide plate, the connecting rod assembly is located between the crank assembly and the variable precision drive assembly, the lifting puncture assembly is located in the middle of the slide plate, and the sampling pump is mounted on the lifting puncture assembly. This invention, while maintaining constant drive motor precision and speed, achieves a relatively fast puncture speed in the initial stage of hollow tube descent by sacrificing precision, and in the final stage of hollow tube descent, achieves relatively high position control precision by sacrificing speed.

Description

Technical Field

[0001] This invention belongs to the field of renal biopsy technology, specifically referring to a renal biopsy device for live examination. Background Technology

[0002] Percutaneous renal biopsy is a crucial method for diagnosing kidney disease. Most existing renal biopsy equipment uses a spring-driven biopsy gun, which compresses a spring and releases it instantly, driving the needle to quickly penetrate the kidney for sample collection. However, this type of equipment has the following inherent drawbacks:

[0003] A: If the initial puncture velocity is too high, when encountering the renal capsule which has high toughness, it is easy for the tissue to deform and slip rather than be cut, resulting in the actual puncture depth being less than the preset value, or sampling failure.

[0004] B: The accuracy of the puncture depth is not high.

[0005] In traditional puncture-driven methods, the faster the puncture speed, the easier it is to puncture the skin, reducing the patient's pain and psychological stress, but the control precision will inevitably be lower; speed and precision are a pair of contradictory technical parameters. Summary of the Invention

[0006] In view of the above situation and to overcome the defects of the prior art, the present invention provides a kidney puncture device for live examination. The variable precision drive component and the lifting puncture component are driven by a crank-slider structure. With the precision and speed of the drive motor remaining unchanged, a relatively fast puncture speed is obtained by sacrificing precision in the initial stage of the hollow tube descent, and a relatively high position control precision is obtained by sacrificing speed in the final stage of the hollow tube descent.

[0007] In addition, the return spring can not only solve the problem of unavoidable mechanical play when gears are engaged, but also work with the sliding resistance between the guide sleeve and the hollow tube to enable the hollow tube to rise slowly and automatically in the event of an accidental power failure, thereby reducing the harm to the human body caused by such failures.

[0008] The technical solution adopted by the present invention is as follows: The present invention proposes a renal puncture device for live examination, including a crank assembly, a connecting rod assembly, a variable precision drive assembly, a lifting puncture assembly, a sampling pump, a biaxial platform and a slide plate. The slide plate is disposed on the biaxial platform, the crank assembly and the variable precision drive assembly are disposed on the slide plate, the connecting rod assembly is disposed between the crank assembly and the variable precision drive assembly, the lifting puncture assembly is disposed in the middle position of the slide plate, and the sampling pump is disposed on the lifting puncture assembly.

[0009] The variable precision drive assembly and the lifting puncture assembly are driven by a crank-slider structure. By utilizing the characteristic of varying speed and precision in this transmission method, the technical objective of rapid puncture in the initial stage and slow, high-precision adjustment in the final stage can be achieved.

[0010] Furthermore, the crank assembly includes a rotating bracket and a sector gear. The rotating bracket is mounted on a slide plate, and the sector gear has a central ring. The sector gear is rotatably mounted on the rotating bracket via the central ring, and the sector gear has an eccentric pin.

[0011] Since sector gears can rotate only within a certain angular range, they can be designed in a sector shape to reduce their size, weight, and inertia.

[0012] Furthermore, the lifting puncture assembly includes a guide sleeve, a hollow tube, a puncture tube, and a return spring. The guide sleeve is fixedly connected to the center hole of the slide plate, the hollow tube is slidably disposed in the guide sleeve, the puncture tube is disposed at the bottom of the hollow tube, and the sampling pump is disposed at the top of the hollow tube.

[0013] The sampling pump can create negative pressure in the hollow tube and puncture tube, thereby enabling sampling at the target location after puncture.

[0014] Furthermore, the linkage assembly includes a reciprocating ring, which is fixed to the outside of the hollow tube, and the return spring is disposed between the reciprocating ring and the slide plate.

[0015] The return spring not only solves the problem of unavoidable mechanical play when gears are engaged, but also works with the sliding resistance between the guide sleeve and the hollow tube to enable the hollow tube to rise slowly and automatically in the event of an unexpected power failure, thereby reducing the harm to the human body caused by such failures.

[0016] Furthermore, the connecting rod assembly also includes a connecting rod body, and the reciprocating ring is provided with a hinge pin. The two ends of the connecting rod body are respectively hinged to the hinge pin and the eccentric pin.

[0017] Furthermore, the variable precision drive assembly includes a drive motor and a drive gear. The drive motor is mounted on the slide plate, and the drive gear is mounted on the output shaft of the drive motor. The drive gear and the sector gear mesh and transmit power.

[0018] The drive motor rotates the sector gear. With the accuracy and speed of the drive motor remaining constant, a relatively fast piercing speed is achieved by sacrificing accuracy in the initial stage of the hollow tube's descent, and a relatively high position control accuracy is achieved by sacrificing speed in the final stage of the hollow tube's descent.

[0019] Furthermore, the dual-axis platform includes a frame support, a Y-axis assembly, and an X-axis assembly. The Y-axis assembly is mounted on the frame support, the X-axis assembly is mounted on the Y-axis assembly, and the frame support is provided with an array of support legs.

[0020] Preferably, the Y-axis assembly includes a Y-axis guide rail, a Y-axis slider, and a sliding beam. The Y-axis guide rail is mounted on a frame support, the Y-axis slider is engaged and slidably mounted on the Y-axis guide rail, and the sliding beam is mounted on the Y-axis slider. The sliding beam has a strip groove, and the hollow tube and the puncture tube are located in the strip groove.

[0021] Preferably, the X-axis assembly includes an X-axis guide rail and an X-axis slider. The X-axis guide rail is mounted on a sliding beam, the X-axis slider is engaged and slidably mounted on the X-axis guide rail, and the slide plate is mounted on the X-axis slider.

[0022] The beneficial effects achieved by the present invention using the above structure are as follows:

[0023] (1) The variable precision drive assembly and the lifting puncture assembly are driven by a crank-slider structure. By utilizing the characteristic that the speed and precision of this transmission form vary, the technical objective of rapid puncture in the initial stage and slow, high-precision adjustment in the final stage can be achieved.

[0024] (2) Since sector gears can only rotate within a certain angle range, sector gears can be designed in a sector shape to reduce their volume, weight and inertia.

[0025] (3) The sampling pump can generate negative pressure in the hollow tube and the puncture tube, so that sampling can be performed on the target location after puncture.

[0026] (4) The return spring can not only solve the mechanical play problem that is difficult to avoid when gears are engaged, but also cooperate with the sliding resistance between the guide sleeve and the hollow tube to realize the slow and automatic rise of the hollow tube when an accidental power failure occurs, thereby reducing the harm to the human body caused by such failure.

[0027] (5) The drive motor drives the sector gear to rotate. Under the condition that the accuracy and speed of the drive motor remain unchanged, in the initial stage of the hollow tube descent, the accuracy is sacrificed to obtain a relatively fast piercing speed, and in the final stage of the hollow tube descent, the speed is sacrificed to obtain a relatively high position control accuracy. Attached Figure Description

[0028] Figure 1 This is a perspective view of a renal biopsy device for live examination proposed in this invention;

[0029] Figure 2 This is a front view of a renal biopsy device for live examination proposed in this invention;

[0030] Figure 3 This is a top view of a renal biopsy device for live examination proposed in this invention;

[0031] Figure 4 for Figure 2 A cross-sectional view along the cutting line AA;

[0032] Figure 5 for Figure 4 A magnified view of a section at point I;

[0033] Figure 6 for Figure 1 A magnified view of section II in the middle.

[0034] The components include: 1. Crank assembly; 2. Connecting rod assembly; 3. Variable precision drive assembly; 4. Lifting and puncture assembly; 5. Sampling pump; 6. Dual-axis platform; 7. Slide plate; 11. Rotating bracket; 12. Sector gear; 21. Connecting rod body; 22. Reciprocating ring; 31. Drive motor; 32. Drive gear; 41. Guide sleeve; 42. Hollow tube; 43. Puncture tube; 44. Return spring; 61. Frame bracket; 62. Y-axis assembly; 63. X-axis assembly; 121. Center ring; 122. Eccentric pin; 221. Hinge pin; 611. Support leg; 621. Y-axis guide rail; 622. Y-axis slider; 623. Sliding beam; 631. X-axis guide rail; 632. X-axis slider; 6231. Strip groove.

[0035] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. Detailed Implementation

[0036] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0037] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0038] like Figures 1-6As shown, the present invention proposes a renal biopsy device for live examination, including a crank assembly 1, a connecting rod assembly 2, a variable precision drive assembly 3, a lifting puncture assembly 4, a sampling pump 5, a biaxial platform 6, and a slide plate 7. The slide plate 7 is disposed on the biaxial platform 6, the crank assembly 1 and the variable precision drive assembly 3 are disposed on the slide plate 7, the connecting rod assembly 2 is disposed between the crank assembly 1 and the variable precision drive assembly 3, the lifting puncture assembly 4 is disposed in the middle position of the slide plate 7, and the sampling pump 5 is disposed on the lifting puncture assembly 4.

[0039] The variable precision drive assembly 3 and the lifting puncture assembly 4 are driven by a crank-slider structure. By utilizing the characteristic of varying speed and precision in this transmission method, the technical objective of rapid puncture in the initial stage and slow, high-precision adjustment in the final stage can be achieved.

[0040] The crank assembly 1 includes a rotating bracket 11 and a sector gear 12. The rotating bracket 11 is mounted on the slide plate 7. The sector gear 12 is provided with a central ring 121. The sector gear 12 is rotatably mounted on the rotating bracket 11 through the central ring 121. The sector gear 12 is provided with an eccentric pin 122.

[0041] Since the sector gear 12 can rotate only within a certain angular range, it can be designed in a sector shape to reduce its size, weight and inertia.

[0042] The lifting puncture assembly 4 includes a guide sleeve 41, a hollow tube 42, a puncture tube 43, and a return spring 44. The guide sleeve 41 is fixed in the center hole of the slide plate 7. The hollow tube 42 is slidably disposed in the guide sleeve 41. The puncture tube 43 is disposed at the bottom of the hollow tube 42. The sampling pump 5 is disposed at the top of the hollow tube 42.

[0043] The sampling pump 5 can generate negative pressure in the hollow tube 42 and the puncture tube 43, thereby enabling sampling at the target location after puncture.

[0044] The connecting rod assembly 2 includes a reciprocating ring 22, which is fixed to the outside of the hollow tube 42, and a return spring 44 is disposed between the reciprocating ring 22 and the slide plate 7.

[0045] The return spring 44 not only solves the problem of unavoidable mechanical play when gears are engaged, but also works with the sliding resistance between the guide sleeve 41 and the hollow tube 42 to enable the hollow tube 42 to rise slowly and automatically when an unexpected power failure occurs, thereby reducing the harm to the human body caused by such failures.

[0046] The connecting rod assembly 2 also includes a connecting rod body 21, and a hinge pin 221 is provided on the reciprocating ring 22. The two ends of the connecting rod body 21 are respectively hinged to the hinge pin 221 and the eccentric pin 122.

[0047] The variable precision drive assembly 3 includes a drive motor 31 and a drive gear 32. The drive motor 31 is mounted on the slide plate 7, and the drive gear 32 is mounted on the output shaft of the drive motor 31. The drive gear 32 and the sector gear 12 mesh and transmit power.

[0048] The drive motor 31 drives the sector gear 12 to rotate. With the accuracy and speed of the drive motor 31 remaining constant, in the initial stage of the descent of the hollow tube 42, a relatively fast piercing speed is obtained by sacrificing accuracy. In the final stage of the descent of the hollow tube 42, a relatively high position control accuracy is obtained by sacrificing speed.

[0049] The dual-axis platform 6 includes a frame bracket 61, a Y-axis assembly 62 and an X-axis assembly 63. The Y-axis assembly 62 is mounted on the frame bracket 61, and the X-axis assembly 63 is mounted on the Y-axis assembly 62. The frame bracket 61 is provided with an array of legs 611.

[0050] The Y-axis assembly 62 includes a Y-axis guide rail 621, a Y-axis slider 622, and a sliding beam 623. The Y-axis guide rail 621 is mounted on a frame bracket 61. The Y-axis slider 622 is engaged and slidably mounted on the Y-axis guide rail 621. The sliding beam 623 is mounted on the Y-axis slider 622. The sliding beam 623 has a strip groove 6231, in which the hollow tube 42 and the puncture tube 43 are located.

[0051] The X-axis assembly 63 includes an X-axis guide rail 631 and an X-axis slider 632. The X-axis guide rail 631 is mounted on a sliding beam 623, and the X-axis slider 632 is engaged and slidably mounted on the X-axis guide rail 631. The slide plate 7 is mounted on the X-axis slider 632.

[0052] In practical use, the user first needs to place the frame-type support 61 above the patient's puncture site, and then adjust the position of the slide plate 7 manually or electrically. After the adjustment is completed, the position of the slide plate 7 is locked, and then the puncture can be performed.

[0053] During puncture, the drive motor 31 drives the sector gear 12 to rotate through the meshing transmission between the drive gear 32 and the sector gear 12. When the hollow tube 42 is at the top, the eccentric pin 122 is at the same height as the central ring 121. At this time, as the sector gear 12 rotates, the connecting rod body 21 can push the hollow tube 42 down through the reciprocating ring 22, thereby pushing the puncture tube 43 down to achieve puncture at the target position.

[0054] The puncture tube 43 is a disposable instrument that is easy to disassemble.

[0055] With the accuracy and speed of the drive motor 31 remaining constant, a relatively fast piercing speed is achieved by sacrificing accuracy in the initial stage of the hollow tube 42's descent, and a relatively high position control accuracy is achieved by sacrificing speed in the final stage of the hollow tube 42's descent.

[0056] Once the puncture tube 43 descends to the target position, the sampling pump 5 creates a negative pressure in the hollow tube 42, thereby drawing the tissue or fluid at the target position into the puncture tube 43 to complete the sampling.

[0057] After sampling is completed, the puncture tube 43 can be raised and reset by reversing the guide sleeve 41.

[0058] During mechanical engagement, gaps of varying sizes inevitably appear between the teeth of the sector gear 12 and the drive gear 32. The elastic force of the return spring 44 ensures that the hollow tube 42 always tends to move upward, preventing the hollow tube 42 from freely rising and falling independently of the drive motor 31 due to this play.

[0059] Furthermore, in the event of an unexpected power outage, the sliding resistance between the guide sleeve 41 and the hollow tube 42 enables the hollow tube 42 to rise slowly and automatically, thereby reducing the harm to the human body caused by such malfunctions.

[0060] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0061] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A renal puncture apparatus for use in vivo examination, characterized by: The device comprises a crank assembly (1), a connecting rod assembly (2), a variable-precision driving assembly (3), a lifting and puncturing assembly (4), a sampling pump (5), a double-shaft platform (6) and a sliding plate (7), the sliding plate (7) is arranged on the double-shaft platform (6), the crank assembly (1) and the variable-precision driving assembly (3) are arranged on the sliding plate (7), the connecting rod assembly (2) is arranged between the crank assembly (1) and the variable-precision driving assembly (3), the lifting and puncturing assembly (4) is arranged at the middle position of the sliding plate (7), and the sampling pump (5) is arranged on the lifting and puncturing assembly (4). The crank assembly (1) comprises a rotating support (11) and a sector gear (12), the rotating support (11) is arranged on the sliding plate (7), the sector gear (12) is provided with a center ring (121), the sector gear (12) is rotatably arranged on the rotating support (11) through the center ring (121), and the sector gear (12) is provided with an eccentric pin shaft (122). The lifting and puncturing assembly (4) comprises a guide sleeve (41), a hollow tube (42), a puncturing tube (43) and a reset spring (44), the guide sleeve (41) is fixedly connected to the center hole of the sliding plate (7), the hollow tube (42) is slidably arranged in the guide sleeve (41), the puncturing tube (43) is arranged at the bottom of the hollow tube (42), and the sampling pump (5) is arranged at the top of the hollow tube (42). The connecting rod assembly (2) comprises a reciprocating ring (22), the reciprocating ring (22) is fixedly connected to the outside of the hollow tube (42), and the reset spring (44) is arranged between the reciprocating ring (22) and the sliding plate (7). The connecting rod assembly (2) further comprises a connecting rod body (21), the reciprocating ring (22) is provided with a hinged pin shaft (221), and the two ends of the connecting rod body (21) are hinged with the hinged pin shaft (221) and the eccentric pin shaft (122) respectively. When puncturing, the driving motor (31) drives the sector gear (12) to rotate, when the hollow tube (42) is located at the top, the eccentric pin shaft (122) is located at the same height as the center ring (121), at this time, with the rotation of the sector gear (12), the connecting rod body (21) can push the hollow tube (42) to descend through the reciprocating ring (22), in the initial stage of the descent of the hollow tube (42), the relatively fast puncturing speed is obtained by sacrificing the precision, and in the final stage of the descent of the hollow tube (42), the relatively high position control precision is obtained by sacrificing the speed.

2. The renal puncture apparatus for in-vivo examination according to claim 1, wherein: The variable-precision driving assembly (3) comprises a driving motor (31) and a driving gear (32), the driving motor (31) is arranged on the sliding plate (7), the driving gear (32) is arranged on the output shaft of the driving motor (31), and the driving gear (32) and the sector gear (12) are in mesh transmission.

3. The renal biopsy device for in vivo examination according to claim 2, wherein: The double-shaft platform (6) comprises a frame support (61), a Y-axis assembly (62) and an X-axis assembly (63), the Y-axis assembly (62) is arranged on the frame support (61), the X-axis assembly (63) is arranged on the Y-axis assembly (62), and the frame support (61) is provided with an array of supporting legs (611).

4. The renal biopsy device for in vivo examination according to claim 3, wherein: The Y-axis assembly (62) comprises a Y-axis guide rail (621), a Y-axis sliding block (622) and a sliding crossbeam (623), the Y-axis guide rail (621) is arranged on the frame support (61), the Y-axis sliding block (622) is clamped and arranged on the Y-axis guide rail (621) in a sliding mode, and the sliding crossbeam (623) is arranged on the Y-axis sliding block (622); the sliding crossbeam (623) is provided with a strip-shaped groove (6231), and the hollow tube (42) and the puncture tube (43) are located in the strip-shaped groove (6231).

5. The renal biopsy device for in vivo examination according to claim 4, wherein: The X-axis assembly (63) comprises an X-axis guide rail (631) and an X-axis sliding block (632), the X-axis guide rail (631) is arranged on the sliding crossbeam (623), and the X-axis sliding block (632) is clamped and arranged on the X-axis guide rail (631) in a sliding mode; and the sliding plate (7) is arranged on the X-axis sliding block (632).

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