End plate processor

Abstract

The invention discloses an end plate processor, and relates to the technical field of medical instruments. In order to solve the problem that the scraping range of an end plate of an existing intervertebral disc reamer is limited, according to the technical scheme, the intervertebral disc reamer comprises a reamer head, a blade adjusting part, a steering part, a transmission part, a motor and a handle, and a blade capable of stretching out or retracting in the radial direction of the reamer head is arranged in the reamer head; the blade adjusting part comprises a blade clamping part, one end of the blade clamping part is connected with the blade, the other end of the blade clamping part is connected with a steel pipe, and the steel pipe extends to the handle and is connected with an adjusting buckle arranged in the handle; the steering part is used for adjusting the angle of the tool bit, and the transmission part is used for transmitting rotation of the motor to the tool bit. Operation wounds can be reduced, operation flexibility is improved, cutting is stable and uniform, the structure is compact, operation is easy, operation efficiency is further improved, and maintenance and cleaning are easy.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to an end plate processor. Background Art

[0002] Due to long-term trauma, disease, degenerative lesions, or wear and tear, people often suffer from damage or displacement of intervertebral discs and / or vertebral bodies. Displacement or damage of intervertebral discs or vertebral bodies may lead to chronic back pain and affect the quality of life. Currently, wear and tear or lesions related to intervertebral discs or vertebral bodies can be treated by minimally invasive spinal surgery (e.g., intervertebral disc fusion, etc.), which specifically requires partial or complete removal of the intervertebral disc and placement of an implant in the cavity formed at the site of the removal of the intervertebral disc to help maintain spinal height and / or restore spinal stability, wherein, in the process of forming the cavity, a reamer is usually required to clean the upper and lower end plates.

[0003] At present, there are many types of intervertebral disc reamers, and the common ones include circular hollow scrapers and hollow intervertebral disc reamers. The circular hollow scraper includes two blades with a "T" shape at the head end. Since a stable fulcrum can be formed, the force is stable and the scraping effect is good. However, due to the small blade, a large range of rapid scraping cannot be achieved. In addition, due to the "T" shape of the head, its diameter is larger than that of the hollow intervertebral disc reamer, and the opening during surgery is larger, which affects the patient's later recovery. The head of the hollow intervertebral disc reamer is a hollow rectangle, and the four long sides of the rectangle are all set as cutting edges, which can achieve a large range of rapid scraping. However, the instrument operation channel of minimally invasive spinal surgery is narrow (only 7 mm in diameter), and the hollow disc reamer is a hard instrument with a limited reach to the end plate. Although the cutting angle of the reamer can be adjusted manually, it is limited by the instrument operation channel and the adjustable angle range is narrow, resulting in a limited range of end plate scraping. The surgical instrument needs to be replaced to deal with the unreachable area, which prolongs the operation time. To save operation time, the surgical opening needs to be enlarged, but this will affect the patient's later recovery. It can be seen that a tool is needed to quickly and comprehensively scrape the upper and lower end plates. Summary of the invention

[0004] The object of the present invention is to provide an end plate processor to solve the problem that the scraping range of the end plate of the existing intervertebral disc reamer is limited without expanding the surgical opening.

[0005] The technical solution of the present invention to solve the above technical problems is as follows: An end plate processor comprises: a cutter head, a blade adjustment part, a steering part, a transmission part, a motor and a handle, wherein a blade which can be extended or retracted in its radial direction is arranged in the cutter head; The blade adjustment part includes a blade clamping part, one end of which is connected to the blade, and the other end of the blade clamping part is connected to a steel pipe, which extends to the handle and is connected to an adjustment buckle arranged in the handle; the steering part is used to adjust the angle of the cutter head, and the transmission part is used to transmit the rotation of the motor to the cutter head.

[0006] Furthermore, the number of blades is at least one, and each blade is provided with a slot along the axial direction, and the depth of the slot gradually changes along the axial direction; the blade clamping portion has at least one end portion consistent with the number of blades, and each end portion is respectively correspondingly inserted into the slot of each blade; the blade clamping portion is a cross-shaped structure, and each blade is provided with a depth gradient groove arranged along the axial direction on the side opposite to its cutting edge, and each end portion of the blade clamping portion is respectively inserted into the depth gradient groove corresponding to each blade.

[0007] Furthermore, the end plate processor also includes a steering portion, which is used to adjust the angle of the cutter head.

[0008] Furthermore, the steering part includes a dial arranged on the handle, the dial is connected to the steering ring through a steel wire rope, the front end of the steering ring is sleeved on the cutter head, and the rear end of the steering ring is fixedly connected to the deformable shell.

[0009] Furthermore, a spherical seat is provided between the steering ring and the deformable shell, the front end of the spherical seat passes through the steering shaft arranged inside the steering ring, and the rear end of the steering ring is movably sleeved outside the spherical surface of the spherical seat.

[0010] Furthermore, bearings are arranged between the steel pipe and the blade adjusting part, between the steering part and the transmission part, and between the steering part and the cutter head.

[0011] Furthermore, the transmission part includes a transmission shaft, a first gear set and a second gear set, the transmission shaft is sleeved on the outside of the steel pipe and does not contact the steel pipe; the output end of the motor is connected to the first gear set, the first gear set is connected to the second gear set through the transmission shaft, and the second gear set is connected to the cutter head.

[0012] Furthermore, the first gear set includes a first gear connected to the output end of the motor, a second gear meshing with the first gear, and the second gear is connected to the transmission shaft.

[0013] Furthermore, the second gear set includes a fifth gear arranged perpendicular to the axial direction, and a third gear and a fourth gear arranged along the axial direction and respectively meshing with the fifth gear, the third gear is connected to the transmission shaft, and the fourth gear is fixedly connected to the cutter head.

[0014] Furthermore, the handle is provided with a strip-shaped opening along the axial direction, and the adjustment buckle is arranged in the strip-shaped opening.

[0015] The present invention has the following beneficial effects: Reduce surgical trauma: The blade of the endplate processor can be extended or retracted along its radial direction. This design allows the blade to be retracted into the blade head when passing through the surgical instrument channel, thereby reducing the need for opening holes during surgery. This not only reduces the difficulty of surgery, but also significantly reduces the trauma of surgery to patient tissues, which helps postoperative recovery.

[0016] Improve surgical flexibility: By setting up a steering part, including components such as a dial, a wire rope and a steering ring, the doctor can easily adjust the angle of the blade. This design provides greater operational flexibility, allowing the doctor to adjust the cutting angle as needed during the operation, thereby scraping the end plate more comprehensively and accurately.

[0017] Stable and uniform cutting effect: The blade is driven by a motor, and the power provided by the motor is more stable and uniform compared to traditional manual operation. This helps doctors maintain consistent cutting force during surgery, improve surgical accuracy, and reduce tissue damage caused by uneven force.

[0018] Compact structure and easy to operate: The structure design of the entire end plate processor is compact, and the various components are closely matched, making the operation easier. In particular, the design of the blade adjustment part, through the blade clamping part and the steel pipe connected with the adjustment buckle in the handle, realizes the precise control of the blade extension length, and simplifies the operation process.

[0019] Improve surgical efficiency: Since the endplate processor combines the above-mentioned innovative designs, doctors can scrape the endplate more quickly and accurately during surgery. This not only shortens the operation time, but also reduces the surgical risk and improves the overall surgical efficiency.

[0020] Easy to maintain and clean: The structure of the endplate processor is well designed, and the various components are easy to disassemble and assemble, which is convenient for post-operative cleaning and maintenance. This helps to extend the service life of the equipment and reduce maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the end plate processor of the present invention; Figure 2 , Figure 3 and Figure 4 It is a structural diagram of the connection between the blade adjustment part and the steering part of the end plate processor of the present invention; Figure 5 It is a connection structure diagram of the steering part and the transmission part of the end plate processor of the present invention; Figure 6 It is a schematic diagram of the blade structure of the end plate processor of the present invention; Figure 7 It is a structural diagram of the connection between the spring and the card block of the end plate processor of the present invention; Figures 1 to 7 The reference numerals shown in the figure represent: a cutter head 1, a blade 11, a depth gradient groove card slot 12; Blade adjustment part 2, blade clamping part 21, steel pipe 22, adjustment buckle 23, spring 24, clamping block 25, pointer 26; Steering part 3, dial 31, wire rope 32, steering ring 33, spherical seat 34, steering shaft 35, boss 36, deformable shell 37; Transmission unit 4, transmission shaft 41, coupling 42, first gear 43, second gear 44, third gear 45, fourth gear 46, fifth gear 47; Motor 5, a first bearing 51, a second bearing 52, a third bearing 53, a fourth bearing 54, a fifth bearing 55, a sixth bearing 56, and a seventh bearing 57; Handle 6 , strip-shaped opening 61 , indicator mark 62 , button 7 . DETAILED DESCRIPTION

[0022] The technical solution of the present invention is described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0023] Please refer to Figure 1 The present invention relates to an end plate processor, in particular to a processor for scraping end plates in spinal surgery. The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0024] The end plate processor of the present invention mainly comprises a cutter head 1, a blade adjustment part 2, a steering part 3, a transmission part 4, a motor 5, a handle 6 and other parts.

[0025] Reference Figure 6 The cutter head 1 is arranged at the front end of the processor, and is used to directly contact and scrape the end plate. The cutter head 1 is cylindrical as a whole, and four axial slits are evenly arranged on the circumference. The four blades 11 can extend from or retract into the cutter head 1 in the radial direction from the four slits. The blade portion of each blade 11 is used to scrape the end plate, and a depth gradient groove 12 is axially arranged on the side opposite to the blade. The design of the depth gradient groove 12 enables the blade 11 to move along a specific trajectory during the extension or retraction process, thereby ensuring that the blade 11 can be stably extended or retracted, and avoiding jamming or deviation during the extension or retraction process.

[0026] Reference Figure 2-5The blade adjustment part 2 is used to adjust the extension or retraction degree of the blade 11. The blade adjustment part 2 includes a blade clamping part 21, a steel pipe 22 and an adjustment buckle 23 connected in sequence. The blade clamping part 21 is a cross-shaped structure with four ends, and each end is respectively clamped into the depth gradient groove 12 of each blade 11. In this way, when the blade clamping part 21 moves back and forth driven by the steel pipe 22, it can drive the blade 11 to extend or retract along the trajectory of the depth gradient groove 12. The steel pipe 22 is uniformly provided with notches along the circumference as a whole to provide a certain flexibility, so that the steel pipe 22 can have a certain bending and deformation ability while transmitting force, so as to better adapt to various angle changes during the operation. The steel pipe 22 extends backward all the way into the handle 6 and is connected to the adjustment buckle 23 arranged in the handle 6.

[0027] The adjustment buckle 23 is disposed in the handle 6, and a strip-shaped opening 61 is opened along the axial direction of the handle 6. A spring 24 and a block 25 are disposed in the adjustment buckle 23 (see Figure 7 ). When it is necessary to adjust the extension and retraction of the blade 11, pull the block 25 downward to compress the spring 24, so that the adjustment buckle 23 is unlocked from the current position and can slide back and forth in the strip opening 61. After adjusting to the target position, release the block 25, and the spring 24 pushes the block 25 upward against the outer shell of the handle 6, thereby fixing the adjustment buckle 23 in the current position. A pointer 26 is also provided on the adjustment buckle 23, and an indicator mark 62 indicating the extension and retraction degree of the blade 11 is provided on the outer shell of the handle 6 to prompt the user to correctly adjust the extension and retraction of the blade 11. The outer surface of the handle 6 around the strip opening 61 is a rough surface to increase the friction between the adjustment buckle 23 and prevent the adjustment buckle 23 from sliding by itself without operation.

[0028] The motor 5 is arranged in the handle 6, and is used to provide power to drive the cutter head 1 to rotate. The output end of the motor 5 is connected to the cutter head 1 through the transmission part 4. The transmission part 4 includes a transmission shaft 41 and two gear sets. The output shaft of the motor 5 is connected to the first gear 43 of the first gear set through a coupling 42. A second gear 44 meshing with the first gear 43 is arranged below the first gear 43, and the second gear 44 is connected to the transmission shaft 41 through another coupling 42. The transmission shaft 41 is sleeved outside the steel pipe 22 and does not contact the steel pipe 22 to ensure that the transmission shaft 41 can rotate smoothly without being hindered by the steel pipe 22.

[0029] The second gear set includes a third gear 45 and a fourth gear 46 arranged in the axial direction and a fifth gear 47 arranged in a direction perpendicular to the axial direction. The third gear 45 and the fourth gear 46 are respectively meshed with the fifth gear 47. The third gear 45 is connected to the transmission shaft 41 through a coupling 42, so as to transmit the rotation of the motor 5 to the transmission shaft 41. The fourth gear 46 is fixedly connected to the cutter head 1, so when the third gear 45 rotates, it can drive the fourth gear 46 and the cutter head 1 fixed thereto to rotate together.

[0030] A first bearing 51 is provided between the first gear 43 and the coupling 42, a second bearing 52 is provided between the second gear 44 and the coupling 42, and a third bearing 53 is provided between the third gear 45 and the coupling 42. The provision of these bearings can reduce the friction between the gears and the coupling 42, and improve the efficiency and stability of the transmission. In addition, a sixth bearing 56 is provided outside the transmission shaft 41 to support the transmission shaft 41 and reduce the friction between it and the surrounding components. A seventh bearing 57 is provided at the front end of the steel pipe 22 to support the steel pipe 22 and reduce the friction between it and the cutter head 1.

[0031] The steering part 3 is used to adjust the angle of the cutter head 1 to meet different needs during the operation. The steering part 3 includes a dial 31, a wire rope 32, a steering ring 33, a spherical seat 34 and a steering shaft 35. The dial 31 is arranged on the handle 6 to facilitate the operator to operate. The end of the wire rope 32 is arranged on the dial 31, and the front end passes through the spherical seat 34 and is fixed on the steering ring 33. The inner wall of the rear end of the steering ring 33 is spherical, so it can be movably sleeved outside the spherical surface of the spherical seat 34. The front end of the steering ring 33 is sleeved outside the cutter head 1, and a fourth bearing 54 is arranged between the steering ring 33 and the cutter head 1 to reduce the friction between the two and improve the flexibility of rotation. The rear end of the steering ring 33 is fixedly connected to a deformable shell 37, so as to ensure that the steering ring 33 can drive the deformable shell 37 and other components connected thereto to rotate together when rotating.

[0032] Meanwhile, the steering ring 33 is fixedly connected to the steering shaft 35. A through hole is provided on the steering shaft 35, and the steel pipe 22 passes through the through hole to ensure that the steel pipe 22 does not interfere with the rotation of the steering shaft 35 while transmitting force. A boss 36 is also provided below the through hole on the steering shaft 35, and the fifth gear 47 is provided on the boss 36. A fifth bearing 55 is provided between the fifth gear 47 and the steering shaft 35 to support the fifth gear 47 and reduce the friction between the fifth gear 47 and the steering shaft 35.

[0033] When the operator needs to adjust the angle of the cutter head 1, he only needs to turn the dial 31, and the turning ring 33 and the cutter head 1 connected thereto can be driven to rotate together through the wire rope 32. Since the inner wall of the rear end of the turning ring 33 is spherical and can be movably mounted outside the spherical surface of the spherical seat 34, the cutter head 1 can rotate freely within a certain range to meet the different angle requirements during the operation.

[0034] The handle 6 is used as the support and gripping part of the entire processor, and its design needs to conform to the ergonomic principles so that the operator can hold and operate it comfortably during the operation. The handle 6 is provided with components such as the motor 5, some components of the transmission part 4, and the adjustment buckle 23 of the blade adjustment part 2. The outer shell of the handle 6 is made of insulating material to ensure the safety of the operator during the operation.

[0035] In addition, a button 7 for controlling the start and stop of the motor 5 is also provided on the handle 6. The operator can start or stop the operation of the motor 5 by pressing or releasing the button 7, thereby controlling the rotation and cutting action of the cutter head 1.

[0036] The working process of the end-plate processor is as follows: First, before the operation begins, the operator needs to extend the processor to the target position through the instrument channel. At this time, the adjustment buckle 23 is kept at the rear end position so that the blade 11 is retracted in the cutter head 1 to avoid the blade 11 from damaging the surrounding tissue during the insertion process.

[0037] When the processor reaches the target position, the operator needs to adjust the extension length of the blade 11 to adapt to the thickness of the end plate. At this time, pull down the block 25 of the adjustment buckle 23 to compress the spring 24, so that the adjustment buckle 23 is unlocked from the current position and can slide back and forth in the strip opening 61. The operator slides the adjustment buckle 23 to the target position according to the surgical requirements and releases the block 25. The spring 24 pushes the block 25 upward against the outer shell of the handle 6, thereby fixing the adjustment buckle 23 in the current position. At this time, the blade clamping portion 21 moves in the depth gradient groove 12 of the blade 11. Since the depth of the depth gradient groove 12 gradually becomes shallower from back to front, the blade 11 can be pushed radially outward to extend the blade 11 to the target length.

[0038] After determining the extension length of the blade 11, the operator can press the button 7 on the handle 6 to start the motor 5. The output end of the motor 5 transmits power to the cutter head 1 through the transmission part 4, so that the cutter head 1 starts to rotate and cut the end plate. Since the rotation of the motor 5 is stable and uniform, it can ensure that the cutter head 1 maintains a stable cutting speed and cutting force during the cutting process, thereby achieving rapid, stable, uniform and large-area scraping of the end plate.

[0039] After scraping away the end plates that the processor can reach at the current angle, the operator can adjust the placement angle of the processor to continue scraping the end plates in other areas. However, due to the small diameter of the surgical channel and the complexity of the spinal structure, there are always end plate areas that cannot be reached no matter how the placement angle is adjusted. At this time, the operator can turn the dial 31 to operate the steering part 3. The dial 31 rotates together with the steering ring 33 and the cutter head 1 connected thereto through the wire rope 32, thereby adjusting the cutting angle of the cutter head 1. Continue to efficiently scrape the remaining end plate areas at the new angle, so that there is no need to replace surgical instruments during the entire end plate scraping process, saving operation time and improving operation efficiency.

[0040] It is worth noting that since the extension and retraction of the blade 11, the angle adjustment of the cutter head 1, and the rotational cutting of the cutter head 1 are independent of each other and do not affect each other, the processor can be used in a variety of ways to meet different needs in actual surgery: The first use method is to extend and retract the blade 11 while the cutter head 1 is rotating and cutting. The operator can adjust the extension length of the blade 11 at any time as needed during the cutting process to adapt to the end plate area of ​​different thicknesses. This use method can achieve a more precise scraping operation on the end plate.

[0041] The second use mode is to adjust the angle of the cutter head 1 while the cutter head 1 is rotating and cutting. The operator can adjust the angle of the cutter head 1 at any time as needed during the cutting process.

[0042] The third usage is that while the cutter head 1 is rotating and cutting, the cutter head 1 can be freely extended and retracted and the cutting angle of the cutter head 1 can also be freely adjusted. However, since this usage requires turning the dial 31 and sliding the adjustment buckle 23 at the same time, an assistant is required to cooperate with the operator to operate.

[0043] The above-mentioned various implementation methods can meet various needs in actual surgery to the greatest extent. Doctors can choose a variety of implementation methods to perform surgery according to the actual situation of each patient's affected area.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A terminal board processor, characterized in that: include: A cutter head (1), a blade adjustment portion (2), a transmission portion (4), a motor (5), and a handle (6); the cutter head (1) is provided with a blade (11) which can be extended or retracted in its radial direction; The blade adjustment portion (2) comprises a blade clamping portion (21), one end of the blade clamping portion (21) being connected to the blade (11), and the other end of the blade clamping portion (21) being connected to a steel pipe (22), the steel pipe (22) extending to the handle (6) and being connected to an adjustment buckle (23) disposed in the handle (6); the transmission portion (4) is used to transmit the rotation of the motor (5) to the blade head (1).

2. The end plate processor according to claim 1, characterized in that: The number of the blades (11) is at least one, and each blade (11) is provided with a slot (12) along the axial direction, and the depth of the slot (12) gradually changes along the axial direction; the blade clamping portion (21) has at least one end portion that is consistent with the number of the blades (11), and each of the ends is correspondingly clamped into the slot (12) of each blade (11).

3. The end plate processor according to claim 1, characterized in that: The end plate processor further comprises a steering portion (3), wherein the steering portion (3) is used to adjust the angle of the cutter head (1).

4. The end plate processor according to claim 3, characterized in that: The steering portion (3) comprises a dial (31) arranged on the handle (6); the dial (31) is connected to a steering ring (33) via a steel wire rope (32); the front end of the steering ring (33) is sleeved on the cutter head (1); and the rear end of the steering ring (33) is fixedly connected to a deformable shell (37).

5. The end plate processor according to claim 4, characterized in that: A spherical seat (34) is provided between the steering ring (33) and the deformable housing (37); the front end of the spherical seat (34) passes through a steering shaft (35) arranged inside the steering ring (33); and the rear end of the steering ring (33) is movably sleeved outside the spherical surface of the spherical seat (34).

6. The end plate processor according to claim 3, characterized in that: Bearings are provided between the steel pipe (22) and the blade adjustment part (2), between the steering part (3) and the transmission part (4), and between the steering part (3) and the cutter head (1).

7. The end plate processor according to claim 1, characterized in that: The transmission part (4) comprises a transmission shaft (41), a first gear set and a second gear set, wherein the transmission shaft (41) is sleeved outside the steel pipe (22) and does not contact the steel pipe (22); the output end of the motor (5) is connected to the first gear set, the first gear set is connected to the second gear set via the transmission shaft (41), and the second gear set is connected to the cutter head (1).

8. The end plate processor according to claim 76, characterized in that The first gear set comprises a first gear (43) connected to the output end of the motor (5), a second gear (44) meshing with the first gear (43), and the second gear (44) is connected to the transmission shaft (41).

9. The end plate processor according to claim 76, characterized in that: The second gear set comprises a fifth gear (47) arranged perpendicular to the axial direction, and a third gear (45) and a fourth gear (46) arranged along the axial direction and respectively meshing with the fifth gear (47); the third gear (45) is connected to the transmission shaft (41), and the fourth gear (46) is fixedly connected to the cutter head (1).

10. The end plate processor according to claim 1, characterized in that: The handle (6) is provided with a strip-shaped opening (61) along the axial direction, and the adjustment buckle (23) is arranged in the strip-shaped opening (61).

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