Intelligent end plate grinding tissue fragment separation and collection device

Abstract

The present invention relates to the field of medical device technology, and discloses an intelligent endplate grinding tissue fragment separation and collection device, comprising a grinding head and a handle; the grinding head comprises an outer sleeve, and a central control shaft is coaxially rotated in the outer sleeve; multiple sets of rotating arms are arranged along the radial direction of the central control shaft, and the other end of the rotating arm is hinged to a telescopic rod, the end of the telescopic rod passes through the outer sleeve and is connected to a double-edged blade, the double-edged blade is arranged tangentially along the outer sleeve, and the double-edged blade includes a hard bone blade and a cartilage blade arranged back to back. The central control shaft rotates so that one of the hard bone blade and the cartilage blade is tilted and the other is attached to the outer sleeve; a drive module, a power supply, and a controller are arranged in the handle, a first drive unit of the drive module is connected to the central control shaft, and a second drive unit is connected to a rotating drum at the bottom of the outer sleeve. In the present invention, the double-edged blade of the grinding head can achieve seamless connection between grinding cartilage tissue and grinding bony endplates, eliminating the need to change instruments and equipment back and forth during surgery, thereby improving surgical efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to an intelligent device for separating and collecting end plate grinding tissue fragments. Background Art

[0002] Degenerative spinal disease is a major cause of spinal cord injury in adults. Patients with degenerative spinal disease experience degeneration of the intervertebral discs, which can protrude posteriorly and compress the spinal nerves. Discectomy is the primary surgical procedure for treating degenerative spinal disease.

[0003] After discectomy, an intervertebral prosthesis is often implanted to maintain intervertebral height. During prosthesis implantation, the endplates must be polished to the desired shape. This procedure involves two steps: cartilage removal and subchondral bony endplate polishing. Cartilage removal requires the use of a spatula, while polishing (shaving) the subchondral bony endplate requires a drill. These two steps are often time-consuming, and switching back and forth between the spatula and drill increases unnecessary manipulation and inefficiency, prolonging the operation and increasing intraoperative risks. Manually scraping cartilage with a spatula is difficult, and the scraped cartilage remains scattered within the intervertebral space, requiring tweezers to remove and discard. This is both time-consuming and laborious. Furthermore, currently customized intervertebral prostheses are designed to fit the bony endplates. Using a spatula to scrape cartilage can easily damage the bony endplates, leading to a mismatch between the customized prostheses. The bone tissue removed from the subchondral endplate is typically collected and re-implanted into the prosthesis to promote intervertebral fusion. However, current methods of grinding, using diamond or watermelon-shaped burrs, break the bone tissue into a slurry that disperses within the intervertebral space, making it difficult to collect. Furthermore, the ground bone mixes with blood and cartilage, making it difficult to quickly separate the pure bone tissue in the operating room. Furthermore, the bone-forming capacity of slurry is far lower than that of bulk bone, hindering intervertebral fusion and leading to a shortage of bone graft material. This necessitates the use of bone graft substitutes, increasing medical costs and complications. Summary of the Invention

[0004] In order to solve the above-mentioned deficiencies in the prior art, the present invention provides an intelligent endplate grinding tissue fragment separation and collection device, which combines the functions of removing cartilage and grinding bony endplates, eliminating the need to replace instruments and equipment back and forth during surgery, thereby improving surgical efficiency.

[0005] In order to achieve the above technical objectives, the technical solution adopted by the present invention is:

[0006] An intelligent end plate grinding tissue fragment separation and collection device, comprising a grinding head and a handle;

[0007] The grinding head includes an outer sleeve, an upper end cover is fixed on the top of the outer sleeve, and the lower end cover is detachably connected to the bottom, and a rotating drum is coaxially fixed to the lower end cover; a central control shaft is coaxially provided in the outer sleeve, the upper end of the central control shaft is rotatably connected to the upper end cover, and the lower end passes through the rotating drum; a plurality of sets of rotating arms are fixed on the central control shaft inside the outer sleeve along its radial direction, and the plurality of sets of rotating arms are evenly arranged circumferentially along the central control shaft, and the other end of the rotating arm is hinged with a telescopic rod through a pin shaft, and the end of the telescopic rod passes through the outer sleeve, and the end of the telescopic rod is connected to a double-edged blade, which is arranged tangentially along the outer sleeve, and the double-edged blade includes a hard bone blade and a cartilage blade arranged back to back, and the central control shaft drives the rotating arm to rotate, and the rotating arm drives the telescopic rod to rotate and telescope through the pin shaft, so that one of the hard bone blade and the cartilage blade is tilted and the other fits the outer sleeve;

[0008] The handle is provided with a driving module, a power supply, and a controller. The driving module is electrically connected to the controller and the power supply. The driving module includes a first driving unit and a second driving unit. The first driving unit is connected to the central control shaft for driving the central control shaft to rotate a specified angle. The second driving unit is connected to the rotating drum for driving the grinding head to rotate as a whole to cut bones.

[0009] As a preferred technical solution, the cartilage blade is made of polymer material, and the elastic modulus of the cartilage blade is between that of bone tissue and cartilage tissue.

[0010] As a preferred technical solution, the hard bone blade is made of metal material.

[0011] As a preferred technical solution, when the cartilage blade is tilted, it is in a cartilage cutting mode. In the cartilage cutting mode, the controller identifies whether the cartilage tissue has been cut through the current and resistance change signals when the grinding head rotates and grinds.

[0012] As a preferred technical solution, the first driving unit includes a first rotary motor, the lower end of the central control shaft is inserted into the handle part and is transmission-connected to the output shaft of the first rotary motor. The first rotary motor rotates a specified angle under the control of the controller, so that one of the hard bone blade and the cartilage blade is tilted and the other fits into the outer sleeve.

[0013] As a preferred technical solution, the rotation angle of the first rotating motor is set to ±8~15°.

[0014] As a preferred technical solution, the second drive unit includes a second rotating motor, a driving wheel, and an annular gear sleeve. The driving wheel and the annular gear sleeve are rotatably arranged in the handle part. The output shaft of the second rotating motor is connected to the driving wheel, and the driving wheel is meshed and connected to the annular gear sleeve. The rotating drum is inserted into the handle part and is keyed to the annular gear sleeve.

[0015] As a preferred technical solution, the rotating arms are provided in 4 to 8 groups, and the rotating arms of adjacent groups are staggered along the axis of the central control shaft.

[0016] As a preferred technical solution, a plurality of partition walls are provided inside the outer sleeve, and the partition walls are fan-shaped. The partition walls and the inner wall of the outer sleeve enclose a fan-shaped collection area, and the area between adjacent collection areas is connected with the central area to form a working area. The central control axis, rotating arm, and telescopic rod are arranged in the working area. A partition membrane is provided inside the collection area, and the partition membrane divides the collection area into a hard bone collection area and a cartilage collection area; a feed port that passes through the collection area is opened on the outer sleeve in the lower area of ​​the blade of the double-edged blade.

[0017] As a preferred technical solution, the inner bottom of the outer sleeve is detachably provided with multiple filter windows, which correspond one-to-one to the hard bone collection area and the cartilage collection area. A drainage pipe is provided on the lower end cover of the outer sleeve, and the drainage pipe is used to connect the negative pressure suction tube.

[0018] The beneficial effects of the present invention are:

[0019] The intelligent endplate grinding tissue fragment separation and collection device of the present invention has a double-edged blade on the grinding head that can achieve seamless connection between grinding cartilage tissue and grinding bony endplates, eliminating the need to replace instruments and equipment back and forth during surgery, thereby improving surgical efficiency.

[0020] The intelligent endplate grinding tissue fragment separation and collection device of the present invention has a double-edged blade whose cartilage blade can only remove cartilage without damaging the bony endplate. In surgeries requiring the use of personalized matching prostheses, i.e., surgeries requiring the retention of bony endplates, the bony endplates can be safely retained without causing damage to the bony endplates.

[0021] The intelligent endplate grinding and tissue fragment separation and collection device of the present invention can grind the bony endplate with a hard bone blade without breaking the bone tissue into pieces, thereby preserving the basic microstructure of the bone and improving the fusion rate of the bone graft. During grinding, the cartilage / bone endplate can be quickly and efficiently removed and the cartilage / bone fragments can be collected at the same time, thus reducing the step of clamping them out bit by bit from the intervertebral space, saving surgical time, simplifying the process, and improving surgical safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 1 is a schematic diagram of the overall structure of an embodiment of the present invention;

[0024] Figure 2 yes Figure 1 A cross-sectional schematic diagram;

[0025] Figure 3 is a schematic cross-sectional view of the grinding head;

[0026] Figure 4 This is a schematic diagram of the bone cutting mode;

[0027] Figure 5 This is a schematic diagram of the cartilage cutting mode;

[0028] Figure 6 Filter window diagram.

[0029] Figure markings: 1-grinding head, 2-handle part, 11-outer sleeve, 12-central control axis, 13-rotating arm, 14-telescopic rod, 15-double-edged blade, 151-hard bone blade, 152-cartilage blade, 16-rotating cylinder, 17-partition wall, 18-partition membrane, 19-filter window, 111-working area, 112-collecting area, 1121-hard bone collecting area, 1122-cartilage collecting area, 21-first driving unit, 211-first rotating motor, 22-second driving unit, 221-second rotating motor, 222-driving wheel, 223-annular gear sleeve, 23-power supply, 24-controller, 3-negative pressure suction tube. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application for protection, but merely represents the selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0031] An intelligent end plate grinding tissue fragment separation and collection device, such as Figures 1-6As shown, it includes a grinding head 1 and a handle part 2; the grinding head 1 includes an outer sleeve 11, the top of the outer sleeve 11 is fixed with an upper end cover, the bottom is detachably connected to the lower end cover, and the lower part of the lower end cover is coaxially fixed with a rotating drum 16; a central control shaft 12 is coaxially provided inside the outer sleeve 11, the upper end of the central control shaft 12 is rotatably connected to the upper end cover, and the lower end passes through the rotating drum 16; a plurality of groups of rotating arms 13 are fixed along the radial direction of the central control shaft 12 inside the outer sleeve 11, and the plurality of groups of rotating arms 13 are evenly distributed circumferentially along the central control shaft 12, and the other end of the rotating arm 13 is hinged with a telescopic rod 14 through a pin shaft, and the end of the telescopic rod 14 passes through the outer sleeve 11, and the end of the telescopic rod 14 is connected to a double-edged blade 15, and the double-edged blade 15 is connected along the outer sleeve 11. The outer sleeve 11 is arranged tangentially, and the double-edged blade 15 includes a hard bone blade 151 and a cartilage blade 152 arranged back to back. The central control shaft 12 drives the rotating arm 13 to rotate, and the rotating arm 13 drives the telescopic rod 14 to rotate and telescope through the pin shaft, so that one of the hard bone blade 151 and the cartilage blade 152 is tilted and the other is fitted into the outer sleeve 11; the cartilage blade 152 is used to remove cartilage tissue, and the hard bone blade 151 is used to remove end plate bone tissue; preferably, the cartilage blade 152 is made of a polymer material, and its elastic modulus is between bone tissue and cartilage tissue. The cartilage blade can only remove cartilage tissue and cannot damage bone tissue; the hard bone blade 151 is made of a metal material.

[0032] The handle part 2 is provided with a driving module, a power supply 23, and a controller 24. The driving module is electrically connected to the controller 24 and the power supply 23. The driving module includes a first driving unit 21 and a second driving unit 22. The first driving unit 21 is connected to the central control shaft 12 for driving the central control shaft 12 to rotate a specified angle; the second driving unit 22 is connected to the rotating drum 16 for driving the grinding head 1 to rotate as a whole through the rotating drum 16 to perform bone cutting. Preferably, the first driving unit 21 includes a first rotary motor 211, and the lower end of the central control shaft 12 is inserted into the handle portion 2 and is transmission-connected to the output shaft of the first rotary motor 211. The first rotary motor 211 rotates a specified angle under the control of the controller 24, so that one of the hard bone blade 151 and the cartilage blade 152 is tilted and the other is fitted into the outer sleeve 11; the rotation angle of the first rotary motor 211 varies depending on the number of rotating arms and the shape of the double-edged blade. Preferably, the rotating arms 13 are provided with 4 to 8 groups, and the rotation angle of the first rotary motor 211 is set to ±8 to 15°. The rotating arms 13 of adjacent groups are staggered along the axial direction of the central control shaft 12. The second driving unit 22 includes a second rotating motor 221, a driving wheel 222, and an annular gear sleeve 223. The driving wheel 222 and the annular gear sleeve 223 are rotatably arranged in the handle part 2. The output shaft of the second rotating motor 221 is connected to the driving wheel 222, and the driving wheel 222 is meshed with the annular gear sleeve 223. The rotating drum 16 is inserted into the handle part 2 and is keyed to the annular gear sleeve 223; the second rotating motor 221 rotates, driving the driving wheel 222 and the annular gear sleeve 223 to rotate synchronously, the annular gear sleeve 223 drives the rotating drum 16 to rotate, and the rotating drum 16 drives the grinding head to rotate as a whole, and the cartilage blade 152 is used to cut cartilage, or after switching the rotation direction through the central control shaft 12, the end plate bone tissue is cut through the hard bone blade 151.

[0033] Specifically, when the central control shaft 12 rotates counterclockwise by a predetermined angle, causing the hard bone blade 151 to tilt (referred to as bone cutting mode), the controller controls the second drive unit 22 to rotate the grinding head counterclockwise, thereby grinding the bony endplate. When the central control shaft 12 rotates clockwise by a predetermined angle, causing the cartilage blade 152 to tilt (referred to as cartilage cutting mode), the controller controls the second drive unit 22 to rotate the grinding head clockwise, thereby grinding the cartilage.

[0034] When grinding starts, the cartilage cutting mode is entered first. The cartilage blade 152 is tilted through the central control shaft 12 to grind off the surface cartilage. When the cartilage blade 152 touches the bone tissue, the cartilage blade 152 cannot cut the bone tissue because its elastic modulus is lower than that of the bone tissue. The current and resistance will change when the grinding head 1 rotates. The controller 24 can receive this information and intelligently identify that it has entered the bone endplate, and then stop grinding or switch to the bone cutting mode; control the central control shaft 12 to rotate in the opposite direction by a predetermined angle, so that the hard bone blade 151 is tilted and the cartilage blade 152 falls, and at the same time control the rotating drum 16 to rotate in the opposite direction for grinding.

[0035] The controller is provided with a mode adjustment switch, which is divided into a general prosthesis implantation surgery mode and a customized prosthesis implantation surgery mode; in the general prosthesis implantation surgery mode, if a bone tissue signal is detected, it automatically switches to a bone cutting mode; in the customized prosthesis implantation surgery mode, if a bone tissue signal is detected, there is no need to switch to a bone cutting mode, but the device is directly stopped.

[0036] Furthermore, a plurality of partition walls 17 are provided in the outer sleeve 11. The partition walls 17 are fan-shaped. The partition walls 17 and the inner wall of the outer sleeve 11 enclose a fan-shaped collection area 112. The area between adjacent collection areas 112 is connected to the central area to form a working area 111. The central control shaft 12, the rotating arm 13, and the telescopic rod 14 are provided in the working area 111. A partition membrane 18 is provided inside the collection area 112. The partition membrane 18 divides the collection area 112 into a hard bone collection area 1121 and a soft bone collection area 1122. Bone collection area 1122; a feed port communicating with the collection area 112 is provided on the outer sleeve 11 at the lower area of ​​the blade of the double-edged blade 15; the cartilage tissue cut by the cartilage blade 152 enters the cartilage collection area 1122 from the feed port, and the bone tissue cut by the hard bone blade 151 enters the hard bone collection area 1121 from the feed port, thereby realizing the collection of broken bones and broken cartilage at the same time during grinding, reducing the step of clamping them out bit by bit from the intervertebral space, saving surgical time and simplifying the process.

[0037] Furthermore, the inner bottom of the outer sleeve 11 is detachably provided with a plurality of filter windows 19, which correspond one to one with the hard bone collection area 1121 and the cartilage collection area 1122. A drainage pipe is provided on the lower end cover of the outer sleeve 11, which is used to connect the negative pressure suction tube 3. During the entire grinding process, physiological saline is continuously dripped into the intervertebral space and negative pressure suction is performed. Liquid and blood are introduced into the waste liquid bucket of the operating room through the negative pressure suction tube 3, while the broken bones and broken cartilage are intercepted by the filter windows 19 and stored in the hard bone collection area 1121 and the cartilage collection area 1122 respectively. 21 and cartilage collection area 1122; the filter window 19 corresponds to the hard bone collection area 1121 and the cartilage collection area 1122 one by one and is detachable. After the grinding is completed, the grinding head 1 is separated from the handle part 2, and then the lower end cover of the outer sleeve 11 is removed, and the filter window 19 corresponding to the hard bone collection area 1121 is opened. After all the broken bones are poured out, the filter window 19 corresponding to the cartilage collection area 1122 is opened to pour out the broken cartilage together, thereby realizing the separation and collection of broken bones and broken cartilage, which is convenient for quickly separating pure bone tissue for bone grafting.

[0038] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art may make various corresponding changes and modifications based on the present invention, but these corresponding changes and modifications should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. An intelligent endplate grinding tissue fragment separation and collection device, comprising a grinding head (1) and a handle (2); characterized in that: The grinding head (1) comprises an outer sleeve (11), the top of the outer sleeve (11) is fixed with an upper end cover, the bottom is detachably connected to the lower end cover, and the lower part of the lower end cover is coaxially fixed with a rotating drum (16); a central control shaft (12) is coaxially provided in the outer sleeve (11), the upper end of the central control shaft (12) is rotatably connected to the upper end cover, and the lower end passes through the rotating drum (16); a plurality of groups of rotating arms (13) are fixed along the radial direction of the central control shaft (12) inside the outer sleeve (11), and the plurality of groups of rotating arms (13) are evenly distributed along the circumference of the central control shaft (12), and the other end of the rotating arm (13) is hinged with a pin. A telescopic rod (14), the end of the telescopic rod (14) passes through the outer sleeve (11), the end of the telescopic rod (14) is connected to a double-edged blade (15), the double-edged blade (15) is arranged tangentially along the outer sleeve (11), and the double-edged blade (15) includes a hard bone blade (151) and a cartilage blade (152) arranged back to back, the central control shaft (12) drives the rotating arm (13) to rotate, and the rotating arm (13) drives the telescopic rod (14) to rotate and extend through the pin shaft, so that one of the hard bone blade (151) and the cartilage blade (152) is tilted and the other is attached to the outer sleeve (11); The handle portion (2) is provided with a driving module, a power supply (23), and a controller (24). The driving module is electrically connected to the controller (24) and the power supply (23). The driving module includes a first driving unit (21) and a second driving unit (22). The first driving unit (21) is connected to the central control shaft (12) in a transmission manner and is used to drive the central control shaft (12) to rotate a specified angle. The second driving unit (22) is connected to the rotating drum (16) and drives the grinding head (1) to rotate as a whole through the rotating drum (16) to cut bones.

2. The intelligent endplate grinding tissue fragment separation and collection device according to claim 1 is characterized by: The cartilage blade (152) is made of a polymer material, and the elastic modulus of the cartilage blade (152) is between that of bone tissue and cartilage tissue.

3. The intelligent endplate grinding tissue fragment separation and collection device according to claim 1, characterized in that: The hard bone blade (151) is made of metal material.

4. The intelligent endplate grinding tissue fragment separation and collection device according to claim 1, characterized in that: When the cartilage blade (152) is tilted, it is in a cartilage cutting mode. In the cartilage cutting mode, the controller (24) identifies whether the cartilage tissue has been cut through the current and resistance change signals when the grinding head (1) rotates and grinds.

5. The intelligent endplate grinding tissue fragment separation and collection device according to claim 1 is characterized by: The first drive unit (21) includes a first rotary motor (211), the lower end of the central control shaft (12) is inserted into the handle portion (2) and is in transmission connection with the output shaft of the first rotary motor (211), and the first rotary motor (211) rotates at a specified angle under the control of the controller, so that one of the hard bone blade (151) and the cartilage blade (152) is tilted and the other is fitted into the outer sleeve (11).

6. The intelligent endplate grinding tissue fragment separation and collection device according to claim 5, characterized in that: The rotation angle of the first rotating motor (211) is set to ±8-15°.

7. The intelligent endplate grinding tissue fragment separation and collection device according to claim 1, characterized in that: The second driving unit (22) comprises a second rotary motor (221), a driving wheel (222), and an annular gear sleeve (223); the driving wheel (222) and the annular gear sleeve (223) are rotatably arranged in the handle portion (2); the output shaft of the second rotary motor (221) is connected to the driving wheel (222), and the driving wheel (222) is meshedly connected to the annular gear sleeve (223); and the rotating drum (16) is inserted into the handle portion (2) and is keyed to the annular gear sleeve (223).

8. The intelligent endplate grinding tissue fragment separation and collection device according to claim 1 is characterized by: The rotating arms (13) are provided in 4 to 8 groups, and the rotating arms (13) of adjacent groups are staggered along the axial direction of the central control shaft (12).

9. The intelligent endplate grinding tissue fragment separation and collection device according to any one of claims 1 to 8, characterized in that: A plurality of partition walls (17) are provided in the outer sleeve (11), and the partition walls (17) are fan-shaped. The partition walls (17) and the inner wall of the outer sleeve (11) enclose a fan-shaped collecting area (112). The area between adjacent collecting areas (112) is connected to the central area to form a working area (111). The central control shaft (12), the rotating arm (13), and the telescopic rod (14) are arranged in the working area (111). A partition membrane (18) is provided inside the collecting area (112), and the partition membrane (18) divides the inside of the collecting area (112) into a hard bone collecting area (1121) and a cartilage collecting area (1122). A feed port that is connected to the collecting area (112) is opened in the lower area of ​​the blade of the double-edged blade (15) on the outer sleeve (11).

10. The intelligent endplate grinding tissue fragment separation and collection device according to claim 9, characterized in that: The inner bottom of the outer sleeve (11) is detachably provided with a plurality of filter windows (19), and the filter windows (19) correspond one-to-one with the hard bone collection area (1121) and the cartilage collection area (1122). A drainage pipe is provided on the lower end cover of the outer sleeve (11), and the drainage pipe is used to connect to the negative pressure suction tube (3).

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