Intelligent end plate grinding tissue fragment separating and collecting device

Abstract

The invention relates to the technical field of medical instruments, and discloses an intelligent end plate grinding tissue fragment separation and collection device which comprises a grinding head part and a handle part. The grinding head part comprises an outer sleeve, and a central control shaft is coaxially and rotatably arranged in the outer sleeve; a plurality of rotating arms are arranged on the central control shaft in the radial direction of the central control shaft, the other ends of the rotating arms are hinged to telescopic rods, the tail ends of the telescopic rods penetrate out of the outer sleeve and are connected with double-edge blades, and the double-edge blades are arranged in the tangential direction of the outer sleeve and comprise hard bone blades and cartilage blades which are arranged back to back. The central control shaft rotates to enable one of the hard bone blade and the cartilage blade to tilt and the other to be attached to the outer sleeve; a driving module, a power supply and a controller are arranged in the handle part, a first driving unit of the driving module is in transmission connection with the central control shaft, and a second driving unit is in transmission connection with the drum at the bottom of the outer sleeve. The double-edged blade of the grinding head part can achieve seamless connection between cartilage tissue grinding and bony end plate grinding, instruments and equipment do not need to be replaced back and forth in an operation, and the operation efficiency is improved.

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: An intelligent end plate grinding tissue fragment separation and collection device, comprising a grinding head and a handle; The grinding head includes an outer sleeve. An upper end cover is fixedly provided at the top of the outer sleeve, and a lower end cover is detachably connected to the bottom. A rotating cylinder is coaxially fixedly provided below the lower end cover. A central control shaft is coaxially arranged inside 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 cylinder. Along the radial direction of the central control shaft inside the outer sleeve, multiple groups of rotating arms are fixedly provided. The multiple groups of rotating arms are evenly arranged along the circumferential direction of the central control shaft. The other end of the rotating arm is hinged with a telescopic rod through a pin shaft. The end of the telescopic rod passes through the outer sleeve, and the end of the telescopic rod is connected to a double-edge blade. The double-edge blade is arranged tangentially to the outer sleeve. The double-edge blade includes a hard bone blade and a soft bone blade arranged back to back. The central control shaft drives the rotating arm to rotate, and the rotating arm drives the telescopic rod to rotate and extend through the pin shaft, so that one of the hard bone blade and the soft bone blade tilts up and the other fits the outer sleeve. A driving module, a power supply, and a controller are arranged inside the handle part. 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 drivingly connected to the central control shaft and is used to drive the central control shaft to rotate a specified angle. The second driving unit is drivingly connected to the rotating cylinder and drives the whole grinding head to rotate for bone shaving through the rotating cylinder.

[0006] As a preferred technical solution, the soft bone blade is made of a polymer material, and the elastic modulus of the soft bone blade is between that of bone tissue and cartilage tissue.

[0007] As a preferred technical solution, the hard bone blade is made of a metal material.

[0008] As a preferred technical solution, when the soft bone blade tilts up, it is in the soft bone shaving mode. In the soft bone shaving mode, the controller identifies whether the cartilage tissue has been completely shaved through the current and resistance change signals during the rotation and grinding of the grinding head.

[0009] As a preferred technical solution, the first driving unit includes a first rotating motor. The lower end of the central control shaft is inserted into the handle part and is drivingly connected to the output shaft of the first rotating motor. The first rotating motor rotates a specified angle under the control of the controller, so that one of the hard bone blade and the soft bone blade tilts up and the other fits the outer sleeve.

[0010] As a preferred technical solution, the rotation angle of the first rotating motor is set to ±8 - 15°.

[0011] As a preferred technical solution, the second driving 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 inside the handle part. The output shaft of the second rotating motor is connected to the driving wheel, the driving wheel meshes with the annular gear sleeve, and the rotating cylinder is inserted into the handle part and is keyed to the annular gear sleeve.

[0012] As a preferred technical solution, there are 4 to 8 groups of the rotating arms, and the adjacent groups of rotating arms are staggeredly arranged along the axial direction of the central control shaft.

[0013] As a preferred technical solution, a plurality of partition walls are arranged inside the outer sleeve. The partition walls are fan-shaped. The partition walls and the inner wall of the outer sleeve enclose a fan-shaped collection area. The area between adjacent collection areas communicates with the central area to form a working area. The central control shaft, the rotating arms, and the telescopic rods are arranged in the working area. A partition membrane is arranged inside the collection area, and the partition membrane divides the inside of the collection area into a hard bone collection area and a cartilage collection area; a feed port communicating with the collection area is opened in the lower area of the outer sleeve where the cutting edges of the double-edged blades are located.

[0014] As a preferred technical solution, a plurality of filter windows are detachably arranged at the inner bottom of the outer sleeve, and the filter windows correspond to the hard bone collection area and the cartilage collection area one by one. A drain pipe is arranged on the lower end cover of the outer sleeve, and the drain pipe is used to connect to a negative pressure suction pipe.

[0015] The beneficial effects of the present invention are as follows: For the intelligent endplate grinding tissue fragment separation and collection device of the present invention, the double-edged blades of the grinding head can realize seamless connection between grinding cartilage tissue and grinding the bony endplate, without the need to replace surgical instruments back and forth during the operation, improving the surgical efficiency.

[0016] For the intelligent endplate grinding tissue fragment separation and collection device of the present invention, the cartilage blades of the double-edged blades can only remove cartilage and will not damage the bony endplate. In surgeries that require the use of personalized matching prostheses, that is, surgeries that require the retention of the bony endplate, it can be safely retained without damaging the bony endplate.

[0017] For the intelligent endplate grinding tissue fragment separation and collection device of the present invention, when grinding the bony endplate with the hard bone blades, the bone tissue will not be ground into mud, and the basic microscopic structure of the bone is retained, improving the fusion rate of bone grafting; during grinding, it can quickly and efficiently remove the cartilage / bony endplate and at the same time collect the cartilage fragments / bony fragments, reducing the operation of picking them out bit by bit from the intervertebral space, saving surgical time and simplifying the process, and also improving surgical safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present application, so they should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0019] Figure 1 It is the overall structural schematic diagram of the embodiment of the present invention; Figure 2 is Figure 1 a schematic cross-sectional view; Figure 3 is a schematic cross-sectional view of the grinding head portion; Figure 4 is a schematic view of the bone shaving mode; Figure 5 is a schematic view of the cartilage shaving mode; Figure 6 is a schematic view of the filter window.

[0020] Reference numerals: 1 - grinding head portion, 2 - handle portion, 11 - outer sleeve, 12 - central control shaft, 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 - collection area, 1121 - hard bone collection area, 1122 - cartilage collection 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 implementation manners

[0021] To make the objectives, 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 with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some, but not all, of the embodiments of the present application. The components of the embodiments of the present application usually described and illustrated in the accompanying 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 accompanying drawings is not intended to limit the scope of the present application to be protected, but merely represents the selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present application.

[0022] An intelligent endplate grinding tissue fragment separation and collection device, as Figures 1-6As shown in the figure, it includes a grinding head 1 and a handle 2; the grinding head 1 includes an outer sleeve 11, with an upper end cover fixedly installed at the top of the outer sleeve 11, a lower end cover detachably connected at the bottom, and a rotating cylinder 16 coaxially fixed at the lower part of the lower end cover; a central control shaft 12 is coaxially arranged 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 cylinder 16; a plurality of rotating arms 13 are radially fixed on the central control shaft 12 inside the outer sleeve 11, the plurality of rotating arms 13 are evenly arranged along the circumferential direction of the central control shaft 12, the other end of the rotating arm 13 is hinged with a telescopic rod 14 through a pin shaft, 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-edge blade 15, the double-edge blade 15 is arranged tangentially to the outer sleeve 11, the double-edge 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 expand and contract through the pin shaft, so that one of the hard bone blade 151 and the cartilage blade 152 tilts and the other fits against the outer sleeve 11; the cartilage blade 152 is used to remove cartilage tissue, and the hard bone blade 151 is used to remove endplate bone tissue; preferably, the cartilage blade 152 is made of a polymer material, and its elastic modulus is between that of bone tissue and cartilage tissue, and the cartilage blade can only remove cartilage tissue and cannot damage bone tissue; the hard bone blade 151 is made of a metal material.

[0023] 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.

[0024] 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.

[0025] When starting the grinding, first enter the cartilage shaving mode. The cartilage blade 152 is lifted by the central control shaft 12 to shave off the surface cartilage. When the cartilage blade 152 touches the bone tissue, since the elastic modulus of the cartilage blade 152 is lower than that of the bone tissue, it cannot shave the bone tissue. When the grinding head 1 rotates, the current and resistance will change. 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 shaving mode; control the central control shaft 12 to rotate a predetermined angle in the opposite direction to lift the hard bone blade 151 and lower the cartilage blade 152, and at the same time control the rotating cylinder 16 to rotate in the opposite direction for grinding.

[0026] The controller is provided with a mode adjustment switch, which is divided into the mode of implanting a general prosthesis and the mode of implanting a customized prosthesis; in the mode of implanting a general prosthesis, if a bone tissue signal is detected, it will automatically switch to the bone shaving mode; in the mode of implanting a customized prosthesis, if a bone tissue signal is detected, there is no need to switch to the bone shaving mode, but directly stop the device.

[0027] Furthermore, a plurality of partition walls 17 are arranged 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 communicated with 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 arranged inside the collection area 112. The partition membrane 18 divides the inside of the collection area 112 into a hard bone collection area 1121 and a cartilage collection area 1122; a feed port communicating with the collection area 112 is opened in the outer sleeve 11 at the lower area of the cutting edge of the double-edge 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, realizing the simultaneous collection of bone fragments and cartilage fragments during grinding, reducing the operation of picking them out bit by bit from the intervertebral space, saving the operation time and simplifying the process.

[0028] Further, a plurality of filter windows 19 are detachably provided at the inner bottom of the outer sleeve 11. The filter windows 19 correspond one-to-one to the hard bone collection area 1121 and the cartilage collection area 1122. A drain pipe is provided on the lower end cover of the outer sleeve 11, and the drain pipe is used to connect to the negative pressure suction pipe 3. During the whole grinding process, physiological saline is continuously dropped into the intervertebral space and negative pressure suction is performed. The liquid and blood are introduced into the waste liquid bucket in the operating room through the negative pressure suction pipe 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. The filter windows 19 correspond one-to-one to the hard bone collection area 1121 and the cartilage collection area 1122 and are 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. The filter window 19 corresponding to the hard bone collection area 1121 is opened, and 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, so as to realize the separated collection of broken bones and broken cartilage, which is convenient for quickly separating out pure bone tissue for bone grafting.

[0029] Certainly, the present invention may also have many other embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and deformations according to the present invention, but these corresponding changes and deformations should all fall within the protection scope of the appended claims of 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, characterized in that: 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, wherein: 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) 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 portion (2). The output shaft of the second rotating motor (221) is connected to the driving wheel (222), and the driving wheel (222) is meshed and connected to the annular gear sleeve (223). The rotating cylinder (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, characterized in that: There are 4 to 8 groups of the rotating arms (13), and adjacent groups of the rotating arms (13) 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 arranged 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 communicated with the central area to form a working area (111). The central control shaft (12), the rotating arms (13), and the telescopic rod (14) are arranged in the working area (111). A partition membrane (18) is arranged inside the collection area (112). The partition membrane (18) divides the inside of the collection area (112) into a hard bone collection area (1121) and a cartilage collection area (1122); a feed port communicating with the collection area (112) is opened in the lower region of the cutting edge 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: A plurality of filter windows (19) are detachably arranged at the inner bottom of the outer sleeve (11). The filter windows (19) correspond to the hard bone collection area (1121) and the cartilage collection area (1122) one by one. A drain pipe is arranged on the lower end cover of the outer sleeve (11), and the drain pipe is used to connect to a negative pressure suction pipe (3).

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