Vertebral endplate processor

Abstract

The present invention discloses an endplate processor, which relates to the field of medical device technology. In order to solve the problem of the limited endplate scraping range of existing intervertebral disc reamers, the following technical solution is proposed: comprising: a cutting head, a blade adjustment portion, a steering portion, a transmission portion, a motor, and a handle. The cutting head is provided with a blade that can be extended or retracted in its radial direction. The blade adjustment portion includes a blade clamping portion, one end of which is connected to the blade, and the other end of which is connected to a steel pipe. The steel pipe extends to the handle and is connected to an adjustment buckle provided in the handle. The steering portion is used to adjust the angle of the cutting head, and the transmission portion is used to transmit the rotation of the motor to the cutting head. The present invention can reduce surgical trauma, improve surgical flexibility, and achieve stable and uniform cutting. It has a compact structure and is easy to operate, further improving surgical efficiency and being easy to maintain and clean.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a vertebral endplate processor. Background Art

[0002] Due to long-term trauma, disease, degenerative changes, or wear and tear, people often suffer from damage or displacement of the intervertebral discs and / or vertebral bodies. Displacement or damage to the intervertebral discs or vertebral bodies can lead to chronic back pain and affect quality of life. Currently, minimally invasive spinal surgery (e.g., disc fusion) can be used to treat wear and tear or lesions of the intervertebral discs or vertebral bodies. Specifically, the intervertebral disc is partially or completely removed, and an implant is placed in the cavity formed at the site of the removed disc to help maintain spinal height and / or restore spinal stability. During 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, the most common of which 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 it can form a stable fulcrum, its force is stable and the scraping effect is good. However, due to its small blade, it cannot achieve large-scale rapid scraping. Moreover, due to its "T"-shaped 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 with the four long sides of the rectangle set as cutting edges, which can achieve large-scale rapid scraping. However, the instrument operation channel of minimally invasive spinal surgery is narrow (only 7 mm in diameter), and the hollow intervertebral 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. If the operation time is to be saved, 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 a vertebral endplate processor to solve the problem that the existing intervertebral disc reamer has a limited endplate scraping range without expanding the surgical opening.

[0005] The technical solution of the present invention to solve the above technical problems is as follows:

[0006] A vertebral endplate processor comprises: a cutting head, a blade adjusting portion, a transmission portion, a motor and a handle, wherein the cutting head is provided with a blade which can be extended or retracted in its radial direction;

[0007] The blade adjustment part includes a blade clamping part, one end of the blade clamping part is connected to the blade, and the other end of the blade clamping part is connected to the steel pipe. The steel pipe extends to the handle and is connected to the adjustment buckle set in the handle; the transmission part is used to transmit the rotation of the motor to the cutter head.

[0008] 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 that is consistent with the number of blades, and each end portion is correspondingly clamped into the slot of each blade.

[0009] Furthermore, the vertebral endplate processor further includes a steering portion, which is used to adjust the angle of the cutting head.

[0010] 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.

[0011] 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 provided inside the steering ring, and the rear end of the steering ring is movably sleeved on the outside of the spherical surface of the spherical seat.

[0012] Furthermore, bearings are provided between the steel pipe and the blade adjusting portion, between the steering portion and the transmission portion, and between the steering portion and the cutter head.

[0013] Furthermore, the transmission part includes a transmission shaft, a first gear set and a second gear set, and 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.

[0014] 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.

[0015] 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.

[0016] 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.

[0017] The present invention has the following beneficial effects:

[0018] Reduced surgical trauma: The blade of this vertebral endplate processor can be extended or retracted radially. This design allows the blade to be retracted into the blade head when passing through the surgical instrument channel, thereby reducing the need for incision during surgery. This not only reduces surgical difficulty, but also significantly reduces surgical trauma to the patient's tissue, facilitating postoperative recovery.

[0019] Improved surgical flexibility: By setting up a steering unit, including components such as a dial, a wire rope, and a steering ring, the surgeon can easily adjust the angle of the blade. This design provides greater operational flexibility, allowing the surgeon to adjust the cutting angle as needed during surgery, thereby scraping the end plate more comprehensively and accurately.

[0020] Stable and uniform cutting effect: The motor-driven blades provide more stable and uniform power compared to traditional manual operation. This helps the surgeon maintain consistent cutting force during surgery, improving surgical precision and reducing tissue damage caused by uneven force.

[0021] Compact and easy to operate: The entire vertebral endplate processor features a compact design with tightly integrated components, making operation easier. The blade adjustment unit, in particular, connects via the blade clip and steel tube to the adjustment buckle in the handle, enabling precise control of blade extension and simplifying operation.

[0022] Improved surgical efficiency: Because the vertebral endplate processor incorporates multiple innovative designs, it enables surgeons to perform endplate scraping more quickly and accurately during surgery. This not only shortens surgical time, but also reduces surgical risks and improves overall surgical efficiency.

[0023] Easy to maintain and clean: The vertebral endplate processor has a rational structural design, and its components are easy to disassemble and assemble, facilitating post-operative cleaning and maintenance. This helps extend the life of the device while reducing maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the overall structure of the vertebral endplate processor of the present invention;

[0025] Figure 2 、 Figure 3 and Figure 4 This is a structural diagram of the connection between the blade adjustment portion and the steering portion of the vertebral endplate processor of the present invention;

[0026] Figure 5 This is a diagram showing the connection structure between the steering portion and the transmission portion of the vertebral endplate processor of the present invention;

[0027] Figure 6 This is a schematic diagram of the blade structure of the vertebral endplate processor of the present invention;

[0028] Figure 7 This is a diagram showing the connection structure of the spring and the clamping block of the vertebral endplate processor of the present invention;

[0029] Figures 1 to 7 The reference numerals shown in the figure are respectively: cutter head 1, blade 11, and slot 12;

[0030] Blade adjustment part 2, blade clamping part 21, steel pipe 22, adjustment buckle 23, spring 24, clamping block 25, pointer 26;

[0031] Steering part 3, dial 31, wire rope 32, steering ring 33, spherical seat 34, steering shaft 35, boss 36, deformable shell 37;

[0032] Transmission unit 4, transmission shaft 41, coupling 42, first gear 43, second gear 44, third gear 45, fourth gear 46, fifth gear 47;

[0033] Motor 5, first bearing 51, second bearing 52, third bearing 53, fourth bearing 54, fifth bearing 55, sixth bearing 56, seventh bearing 57;

[0034] Handle 6, strip-shaped opening 61, indicator mark 62, button 7. DETAILED DESCRIPTION

[0035] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all 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.

[0036] Please refer to Figure 1 The present invention relates to a vertebral endplate processor, in particular to a processor for scraping endplates during spinal surgery. The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0037] The vertebral endplate processor of the present invention mainly includes a cutting head 1, a blade adjustment part 2, a steering part 3, a transmission part 4, a motor 5 and a handle 6.

[0038] Reference Figure 6The 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 slot 12 is provided axially on the side opposite to the blade. The design of the slot 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 extended or retracted stably, and avoiding jamming or offset during the extension or retraction process.

[0039] Reference Figure 2-5 The blade adjustment portion 2 is used to adjust the extension or retraction degree of the blade 11. The blade adjustment portion 2 includes a blade clamping portion 21, a steel pipe 22 and an adjustment buckle 23 connected in sequence. The blade clamping portion 21 is a cross-shaped structure with four ends, and each end is respectively clamped into the slot 12 of each blade 11. In this way, when the blade clamping portion 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 slot 12. The steel pipe 22 is uniformly provided with notches along the circumference as a whole to provide a certain degree of 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 all the way back to the inside of the handle 6 and is connected to the adjustment buckle 23 provided in the handle 6.

[0040] The adjustment buckle 23 is set in the handle 6, and a strip-shaped opening 61 is opened along the axial direction of the handle 6. The adjustment buckle 23 is provided with a spring 24 and a block 25 (refer to 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 the adjustment buckle 23 to prevent the adjustment buckle 23 from sliding on its own without operation.

[0041] 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 is provided below the first gear 43 and is meshed with the first gear 43. 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 obstructed by the steel pipe 22.

[0042] The second gear set includes a third gear 45 and a fourth gear 46 arranged axially, and a fifth gear 47 arranged perpendicular to the axial direction. The third gear 45 and the fourth gear 46 respectively mesh with the fifth gear 47. The third gear 45 is connected to the transmission shaft 41 via a coupling 42, thereby transmitting the rotation of the motor 5 to the transmission shaft 41. The fourth gear 46 is fixedly connected to the cutter head 1. Therefore, when the third gear 45 rotates, it can drive the fourth gear 46 and the cutter head 1 fixed to it to rotate together.

[0043] 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 arrangement of these bearings reduces friction between the gears and the coupling 42, improving transmission efficiency and stability. Furthermore, a sixth bearing 56 is provided outside the transmission shaft 41 to support the transmission shaft 41 and reduce friction between it and surrounding components. A seventh bearing 57 is provided at the front end of the steel pipe 22 to support it and reduce friction between it and the cutter head 1.

[0044] The steering portion 3 is used to adjust the angle of the cutting head 1 to accommodate different needs during surgery. The steering portion 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 mounted on the handle 6 to facilitate operation by the operator. The end of the wire rope 32 is mounted on the dial 31, and the front end passes through the spherical seat 34 and is fixed to the steering ring 33. The inner wall of the rear end of the steering ring 33 is spherical, so it can be movably mounted outside the spherical surface of the spherical seat 34. The front end of the steering ring 33 is mounted outside the cutting head 1, and a fourth bearing 54 is provided between the steering ring 33 and the cutting head 1 to reduce friction between the two and increase rotational flexibility. The rear end of the steering ring 33 is fixedly connected to a deformable shell 37, thereby ensuring that the steering ring 33 can drive the deformable shell 37 and other components connected thereto to rotate together when it rotates.

[0045] The steering ring 33 is fixedly connected to the steering shaft 35. A through-hole is provided in the steering shaft 35, through which the steel tube 22 passes. This ensures that the steel tube 22 transmits force without interfering with the rotation of the steering shaft 35. A boss 36 is provided below the through-hole on the steering shaft 35, and the fifth gear 47 is mounted 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 friction between the fifth gear 47 and the steering shaft 35.

[0046] When the operator needs to adjust the angle of the cutting head 1, they simply turn the dial 31, which drives the steering ring 33 and the connected cutting head 1 to rotate together via the wire rope 32. Because the inner wall of the rear end of the steering ring 33 is spherical and is movably mounted outside the spherical surface of the spherical seat 34, the cutting head 1 can rotate freely within a certain range to adapt to different angles required during surgery.

[0047] The handle 6, which supports and holds the entire surgical procedure, must be ergonomically designed to ensure comfortable grip and operation by the operator during surgery. The handle 6 houses the motor 5, some components of the transmission unit 4, and the adjustment buckle 23 of the blade adjustment unit 2. The outer shell of the handle 6 is made of insulating material to ensure operator safety during operation.

[0048] 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.

[0049] The working process of the vertebral endplate processor is as follows:

[0050] First, before the operation begins, the operator needs to insert the processor into 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.

[0051] 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. After the operator slides the adjustment buckle 23 to the target position according to the surgical requirements, the block 25 is released. 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 part 21 moves in the card slot 12 of the blade 11. Since the depth of the card slot 12 gradually becomes shallower from back to front, the blade 11 can be pushed radially outward so that the blade 11 is extended to the target length.

[0052] After determining the extension length of blade 11, the operator presses button 7 on handle 6 to activate motor 5. The output of motor 5 transmits power to cutter head 1 via transmission unit 4, causing it to rotate and cut the endplate. The stable and uniform rotation of motor 5 ensures that cutter head 1 maintains a consistent cutting speed and force during the cutting process, achieving rapid, stable, uniform, and extensive scraping of the endplate.

[0053] 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. The remaining end plate areas continue to be scraped efficiently 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.

[0054] 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:

[0055] The first method of use is to simultaneously extend and retract the blade 11 while the cutter head 1 rotates and cuts. The operator can adjust the extension length of the blade 11 as needed during the cutting process to accommodate endplate areas of varying thickness. This method of use allows for more precise scraping of the endplate.

[0056] 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.

[0057] The third way of using is that while the cutter head 1 rotates and cuts, 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 way of using 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.

[0058] The above multiple implementation methods can meet various needs in actual surgery to the greatest extent. Doctors can choose multiple implementation methods to perform surgery according to the actual situation of each patient's affected area.

[0059] 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 principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A vertebral endplate 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) that 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) is connected to the blade (11), and the other end of the blade clamping portion (21) is connected to a steel pipe (22), and the steel pipe (22) extends to the handle (6) and is connected to an adjustment buckle (23) provided in the handle (6); the transmission portion (4) is used to transmit the rotation of the motor (5) to the cutter head (1); 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 the same as the number of the blades (11), and each end portion is correspondingly clamped into the slot (12) of each blade (11); The end plate processor further comprises a steering portion (3), and the steering portion (3) is used to adjust the angle of the cutter head (1); The steering portion (3) comprises a dial (31) provided on the handle (6), the dial (31) being connected to a steering ring (33) via a steel wire rope (32), the front end of the steering ring (33) being sleeved on the cutter head (1), and the rear end of the steering ring (33) being fixedly connected to a deformable shell (37); A spherical seat (34) is provided between the steering ring (33) and the deformable shell (37); the front end of the spherical seat (34) passes through a steering shaft (35) provided inside the steering ring (33); and the rear end of the steering ring (33) is movably sleeved on the outside of the spherical surface of the spherical seat (34); 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).

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

3. The vertebral endplate 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 on the outside of 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).

4. The vertebral endplate processor according to claim 3, 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).

5. The vertebral endplate processor according to claim 3, 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).

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