Angle and length adjustable percutaneous minimally invasive bone fracture plate fixing channel for traumatic orthopedics department

Abstract

The invention discloses an angle and length adjustable percutaneous minimally invasive bone fracture plate fixing channel for traumatic orthopedics, and relates to the field of traumatic orthopedics, the angle and length adjustable percutaneous minimally invasive bone fracture plate fixing channel for traumatic orthopedics comprises a handheld mechanism held by an operator, a plurality of adjusting mechanisms used for establishing a bone fracture channel and a bone fracture plate clamping mechanism, the adjusting mechanisms are the same in structural shape, and the bone fracture plate clamping mechanism is used for clamping the bone fracture plate. The bone fracture plate clamping mechanism is used for clamping a bone fracture plate, the adjusting mechanism is used for adjusting the length of the bone fracture channel, and the handheld mechanism is used for controlling the angle of the bone fracture channel and adjusting the length of the bone fracture channel. According to the angle and length adjustable percutaneous minimally invasive bone fracture plate fixing channel for the traumatic orthopedics department, multi-angle and length adjustment can be conducted on the channel through the handheld mechanism, an operator can accurately judge whether a bone fracture plate reaches a preset position or not by observing a display screen, position deviation caused by judgment depending on experience in a traditional operation is avoided, and the operation efficiency is improved. And the soft tissue injury caused by repeated adjustment is greatly reduced.

Description

Technical Field

[0001] This invention belongs to the field of trauma orthopedics, specifically a percutaneous minimally invasive bone plate fixation channel with adjustable angle and length for trauma orthopedics. Background Technology

[0002] Minimally invasive plate fixation is a technique developed based on the concept of "biomechanical fixation." It does not require extensive exposure of the fracture ends. Instead, it involves inserting a plate into the intermuscular space on the bone surface through only 2-3 small incisions using special tools, and then fixing the fracture with screws to achieve fracture reduction and stability.

[0003] Currently, the length and angle of existing minimally invasive bone plate fixation channels in trauma orthopedics are predetermined. However, since the length and orientation of each person's bones are different, the surgeon's experience is mainly relied upon for subcutaneous blunt dissection, making it difficult to accurately establish an extraperiosteal channel under the muscle in one operation. Repeated operations exacerbate soft tissue damage.

[0004] To address these issues, those skilled in the art have proposed using adjustable-angle and adjustable-length percutaneous minimally invasive bone plate fixation channels in trauma orthopedics to resolve the problems raised in the background section. Summary of the Invention

[0005] The purpose of this invention is to provide a percutaneous minimally invasive bone plate fixation channel with adjustable angle and length for trauma orthopedics, in order to solve the problem that the length and angle of the existing fixation channel are determined by preset, but the length and direction of each person's bones are different. The main reliance is on the surgeon's experience to perform subcutaneous blunt dissection, which makes it difficult to accurately establish an extraperiosteal channel under the muscle in one operation. Repeated operations aggravate the problem of soft tissue damage.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a percutaneous minimally invasive bone plate fixation channel for trauma orthopedics with adjustable angle and length, comprising a hand-held mechanism for the surgeon, an adjustment mechanism for establishing the bone channel, and a bone plate clamping mechanism. Several adjustment mechanisms are provided, each with the same structural shape. The bone plate clamping mechanism is used to clamp the bone plate. The adjustment mechanism is used to adjust the length of the bone channel. The hand-held mechanism is used to control the angle and length adjustment of the bone channel. The bone plate clamping mechanism is located at the front end of the bone channel, and the hand-held mechanism is located at the rear end of the bone channel.

[0007] The handheld mechanism includes a handheld compartment, a winding wheel, a rotating component, and a rotating wheel. The handheld compartment has traction holes at the four corners on the side near the bone access channel. Each traction hole contains a traction rope. The traction rope passes through each adjustment mechanism and is fixedly connected to the bone plate clamping mechanism. There are four winding wheels, all located inside the handheld compartment. The four traction ropes are wound around the surface of the four winding wheels. Each winding wheel has a rotating component on the side near the outside of the handheld compartment. Each rotating component passes through the handheld compartment and extends to the outside of the handheld compartment (101). Each rotating component located outside the handheld compartment (101) has a rotating wheel at its top.

[0008] Preferably, the handheld mechanism further includes a first docking plate, which is located on the side of the handheld compartment near the adjustment mechanism. The surface of the first docking plate has a first threaded hole, and a fixing bolt is provided inside the first threaded hole.

[0009] Preferably, the handheld mechanism further includes a display screen, operation buttons, a power supply, a processor, and a heat sink. The display screen is located on the top of the handheld compartment, the operation buttons are located on the side of the display screen, the power supply and the processor are both located inside the handheld compartment, and the power supply, processor, display screen, and operation buttons are all electrically connected to each other. The heat sink is located on the side of the handheld compartment away from the adjustment mechanism.

[0010] Preferably, the multiple adjustment mechanisms are interconnected. Each adjustment mechanism includes a first mounting block, a second mounting block, a second mating plate, a first mating groove, a second threaded hole, a first adjustment block, and a second adjustment block. The first mounting block and the second mounting block are arranged in a mirror-symmetrical manner. The top side of the first mounting block is provided with a second mating plate, and the top of the second mounting block is provided with a first mating groove. The first mating groove and the second mating plate are matched with each other, and the surfaces of the first mating groove and the second mating plate are provided with second threaded holes. Each second threaded hole is provided with a fixing bolt. The first adjustment block and the second adjustment block are located between the first mounting block and the second mounting block. A first roller is provided between the first adjustment block and the first mounting block, and another first roller is provided between the second adjustment block and the second mounting block. A sliding block is provided on the side of the first adjustment block, and a sliding groove is provided on the side of the first mounting block near the first adjustment block. The sliding groove is slidably engaged with the sliding block. Another sliding block is provided on the side of the second adjustment block, and another sliding groove is provided on the side of the second mounting block near the second adjustment block. The other sliding block and the other sliding groove are slidably engaged.

[0011] Preferably, each of the first adjusting block, the second adjusting block, the first mounting block, and the second mounting block has a traction hole at one of its four corners, and the traction hole passes through the first adjusting block, the second adjusting block, the first mounting block, and the second mounting block. Each of the first adjusting block, the second adjusting block, the first mounting block, and the second mounting block has a wire through hole on its side, and the wire through hole passes through the first adjusting block, the second adjusting block, the first mounting block, and the second mounting block. A spring is provided between the first adjusting block and the second adjusting block, and the two ends of the spring are fixedly connected to the first adjusting block and the second adjusting block, respectively.

[0012] Preferably, the bone plate clamping mechanism includes an installation chamber, an installation plate, a second mating groove, a second roller, a side mounting block, a first clamping plate, a second clamping plate, a sleeve, and an alignment rod. The installation plate is located at the end of the adjustment mechanism away from the hand-held mechanism, and the installation chamber is located on the side of the installation plate away from the adjustment mechanism. A second roller is provided between the installation plate and the installation chamber, and the installation chamber is rotatably connected to the installation plate via the second roller. The second mating groove is opened at the top of the installation plate and is matched and connected to the second mating plate and fixed by fixing bolts. The side mounting block is located on the side of the installation chamber away from the installation plate and is symmetrically arranged along the vertical central axis of the installation chamber. The first clamping plate is rotatably connected to the upper side mounting block of the installation chamber, and the second clamping plate is rotatably connected to the lower side mounting block of the installation chamber. The sleeve is located at the bottom of the first clamping plate, and the alignment rod is located at the top of the second clamping plate. The sleeve is matched and connected to the alignment rod.

[0013] Preferably, the bone plate clamping mechanism further includes a sliding groove, a slider, a threaded rod, a threaded sleeve, a first rotating plate, a second rotating plate, a drive motor, and a partition. The sliding groove is located on the side of the mounting plate near the mounting chamber, and the slider is located on the side of the mounting chamber near the mounting plate. The sliding groove and the slider are slidably engaged. The threaded rod is located between the first clamping plate and the second clamping plate. The drive motor is located inside the mounting chamber, with one end of the threaded rod passing through the mounting chamber and extending into its interior. The output shaft of the drive motor is fixedly connected to the end of the threaded rod located inside the mounting chamber. The partition is located inside the mounting chamber, and the base of the drive motor is fixedly connected to the partition. The threaded rod has a threaded sleeve threaded onto its surface at the end outside the mounting chamber. The first rotating plate and the second rotating plate are rotatably connected to the top and bottom of the threaded sleeve, respectively. The ends of the first rotating plate and the second rotating plate away from the threaded sleeve are rotatably connected to the first clamping plate and the second clamping plate, respectively.

[0014] Preferably, the bone plate clamping mechanism further includes a camera, a connecting wire, and an image processing module. The camera is located on the side of the mounting compartment away from the mounting plate, the image processing module is located inside the mounting compartment, the connecting wire connects the camera and the image processing module, and the image processing module is electrically connected to the processor and the power supply through the wire passing through the wire hole.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. This invention connects various adjustment mechanisms and connects the first docking plate of the handheld mechanism with the first docking groove of the adjustment mechanism. Simultaneously, a fixing bolt is used to match the first threaded hole, connecting the handheld mechanism and the adjustment mechanism. Then, a traction rope is passed through the traction hole, sequentially passing through multiple adjustment mechanisms, and finally fixedly connected to the side wall of the installation compartment. Four traction ropes are provided, located at the four corners of the side wall of the installation compartment. The second docking groove of the side wall of the installation compartment is then matched and connected to the second docking plate, and fixed with fixing bolts. A wire extending from the side of the installation compartment passes through a wire hole and sequentially through several adjustment mechanisms, finally extending into the handheld mechanism and electrically connecting to the power supply and processor. This completes the overall assembly of the device, making installation and disassembly more convenient and easier to use.

[0017] 2. This invention plans the position of the bone plate and the ideal angle of each screw on a computer based on CT data. Then, a drive motor drives the threaded rod to rotate, causing the threaded sleeve to move on the surface of the threaded rod, thereby moving the first and second rotating plates. This drives the first and second clamping plates to move away from each other, aligning the connecting hole of the bone plate with the sleeve and the alignment rod, so that the bone plate is limited by the sleeve and the alignment rod. Then, the drive motor reverses, fixing the bone plate with the first and second clamping plates to prevent displacement. Then, the surgeon holds the handheld magazine and inserts the bone channel, which consists of the bone plate clamping mechanism and the adjustment mechanism, into the surgical incision, directly reaching the bone surface of the fracture area. During this process, by rotating the two rotating wheels on the upper and lower left side of the handheld magazine, the two rotating wheels simultaneously drive the traction rope to wind up. At this time, the winding wheel causes the installation magazine to shift to the left. Because multiple adjustment mechanisms are interconnected, and the installation magazine is rotatably connected to the installation plate through the second roller. The first and second adjustment blocks are rotatably connected to the first and second mounting blocks via the first roller, respectively. Simultaneously, the side of the mounting chamber is engaged with the slide groove via a slider, and the sides of the first and second mounting blocks are also engaged with the slide groove via sliders. Therefore, when the left traction rope is wound up, the bone channel will shift to the left at an angle. Similarly, rotating the two rotating wheels on the upper and lower right side of the handheld chamber will cause the bone channel to shift to the right at an angle. Rotating the two rotating wheels at the top of the handheld chamber will cause the bone channel to shift upwards at an angle, and rotating the two rotating wheels at the bottom of the handheld chamber will cause the bone channel to shift downwards at an angle. Simultaneously rotating all four rotating wheels can tighten or loosen the spring between the first and second adjustment blocks, thereby allowing for fine-tuning of the length of the bone channel at the patient's fracture site. This avoids surgical risks caused by an excessively long or short bone channel, improves the overall flexibility of the device, and allows for flexible replacement of different adjustment mechanisms to adapt to various bones and different types of bone plates.

[0018] 3. This invention, through its camera, allows for precise observation of the deep bone plate position, bone surface condition, and screw holes during surgery, significantly reducing reliance on X-ray fluoroscopy and making the surgery more intuitive and safer. The captured images are transmitted via connecting wires to the image processing module and then via wires to the processor in the handheld compartment. After processing, the images are displayed on the screen. Once the bone plate reaches the preset position, locking screws or cortical bone screws are precisely inserted sequentially. Then, the drive motor can be reversed via the operation button, thereby releasing the first and second clamping plates from fixing the bone plate. After fixation is complete, the device can be removed from the incision, reducing surgical time. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the handheld mechanism in this invention;

[0022] Figure 3 This is a cross-sectional view of the handheld mechanism in this invention;

[0023] Figure 4 This is a schematic diagram of the adjustment mechanism in this invention;

[0024] Figure 5 This is a schematic diagram of the clamping mechanism in this invention;

[0025] Figure 6 This is a cross-sectional view of the clamping mechanism in this invention.

[0026] In the picture:

[0027] 1. Handheld Mechanism; 101. Handheld Compartment; 102. Display Screen; 103. Operation Button; 104. First Connecting Plate; 105. Fixing Bolt; 106. First Threaded Hole; 107. Power Supply; 108. Processor; 109. Heat Dissipation Slot; 110. Rewinding Roller; 111. Rotating Component; 112. Rotating Wheel; 2. Adjustment Mechanism; 201. First Mounting Block; 202. Second Mounting Block; 203. Second Connecting Plate; 204. First Connecting Groove; 205. Second Threaded Hole; 206. First Adjusting Block; 207. Second Adjusting Block; 208. First Roller; 209. 3. Spring; 4. Bone plate clamping mechanism; 5. Mounting chamber; 6. Mounting plate; 7. Second docking groove; 8. Second roller; 9. Side mounting block; 10. First clamping plate; 11. Second clamping plate; 12. Second clamping plate; 13. Sleeve; 14. Alignment rod; 15. Slide groove; 16. Threaded rod; 17. Threaded sleeve; 18. First rotating plate; 19. Second rotating plate; 20. Drive motor; 20. Camera; 21. Connecting wire; 32. Partition; 33. Image processing module; 4. Traction rope; 5. Wire through hole; 6. Traction hole. Detailed Implementation

[0028] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0029] As attached Figure 1 To be continued Figure 6 As shown:

[0030] This invention provides a percutaneous minimally invasive bone plate fixation channel with adjustable angle and length for trauma orthopedics, including a hand-held mechanism 1 for the surgeon, an adjustment mechanism 2 for establishing the bone channel, and a bone plate clamping mechanism 3. Several adjustment mechanisms 2 are provided, and each adjustment mechanism 2 has the same structural shape. The bone plate clamping mechanism 3 is used to clamp the bone plate. The adjustment mechanism 2 is used to adjust the length of the bone channel. The hand-held mechanism 1 is used to control the angle and length adjustment of the bone channel. The bone plate clamping mechanism 3 is located at the front end of the bone channel, and the hand-held mechanism 1 is located at the rear end of the bone channel.

[0031] The handheld mechanism 1 includes a handheld compartment 101, a winding wheel 110, a rotating component 111, and a rotating wheel 112. The handheld compartment 101 has traction holes 6 at the four corners of the side near the bone channel. Each traction hole 6 is equipped with a traction rope 4. The traction rope 4 passes through each adjustment mechanism 2 and is fixedly connected to the bone plate clamping mechanism 3. There are four winding wheels 110. The four winding wheels 110 are all located inside the handheld compartment 101. The four traction ropes 4 are respectively wound around the surface of the four winding wheels 110. Each winding wheel 110 is equipped with a rotating component 111 on the side near the outside of the handheld compartment 101. Each rotating component 111 passes through the handheld compartment 101 and extends to the outside of the handheld compartment (101). Each rotating component 111 located outside the handheld compartment 101 is equipped with a rotating wheel 112 at its top.

[0032] The handheld compartment 101 of the handheld mechanism 1 is made of medical-grade ABS resin. This material is lightweight and resistant to repeated high-temperature and high-pressure sterilization, which can meet the needs of frequent sterilization of surgical instruments. The surface of the handheld compartment 101 is treated with anti-slip texture to prevent the operator from slipping due to sweaty hands. The handheld mechanism 1 also includes a first docking plate 104, which is located on the side of the handheld compartment 101 near the adjustment mechanism 2. The surface of the first docking plate 104 is provided with a first threaded hole 106, and a fixing bolt 105 is provided inside the first threaded hole 106. The handheld mechanism 1 also includes a display screen 102, an operation button 103, a power supply 107, a processor 108, and a heat sink 109. The display screen 102 is located on the top of the handheld compartment 101, the operation button 103 is located on the side of the display screen 102, the power supply 107 and the processor 108 are both located inside the handheld compartment 101, and the power supply 107, the processor 108, the display screen 102 and the operation button 103 are electrically connected to each other. The heat sink 109 is located on the side of the handheld compartment 101 away from the adjustment mechanism 2.

[0033] The four winding wheels 110 inside the handheld compartment 101 are made of titanium alloy with an anti-slip surface. Each traction rope 4 is wound around one winding wheel 110. The winding wheel 110 and the rotating part 111 are integrated into one unit. A medical silicone sealing ring is installed at the part of the rotating part 111 that passes through the handheld compartment 101 to prevent disinfectant from seeping into the interior.

[0034] When the surgeon needs to adjust the angle of the bone setting channel, this is achieved by rotating the rotating wheels 112 on the outside of the handheld compartment 101: rotating the two upper and lower rotating wheels 112 on the left side will drive the corresponding winding wheel 110 to simultaneously wind up the two traction ropes 4 on the left side. When the left traction rope 4 is shortened, it will pull the bone plate clamping mechanism 3 to shift to the left. Since the mounting compartment 301 of the bone plate clamping mechanism 3 is rotatably connected to the mounting plate 302 through the second roller 304, and the first adjusting block 206 and the second adjusting block 207 in the adjusting mechanism 2 are respectively rotated through the first roller 208 to the first mounting block 201 and the second mounting block 202, and the sliding blocks and sliding grooves between each component cooperate, the entire channel body can be smoothly bent in the left direction to achieve fine-tuning of the angle. Similarly, rotating the two upper and lower rotating wheels 112 on the right side can control the channel to shift to the right, rotating the two rotating wheels 112 at the top can control the channel to shift upward, and rotating the two rotating wheels 112 at the bottom can control the channel to shift downward. The adjustment accuracy in the four directions can reach 0.5°, meeting the angle requirements of different fracture sites.

[0035] The display screen 102 on the top of the handheld compartment 101 is a high-definition LCD screen with a resolution of 1280×720. The brightness can be adjusted via the operation button 103, which can clearly display the deep tissue images transmitted by the camera 316. The operation button 103 is a waterproof touch button, which corresponds to functions such as "image magnification", "light adjustment" and "motor control", which is convenient for the surgeon to operate with one hand. The power supply 107 inside the handheld compartment 101 is a rechargeable medical lithium battery with a capacity of 2000mAh, which can meet the needs of 4 surgeries on a single charge. The processor 108 uses a low-power ARM chip, which can quickly process the image signals transmitted by the image processing module 319 and mark key information such as the position of the bone plate and the alignment of the screw holes on the display screen 102 to assist the surgeon in judgment. The heat dissipation slot 109 on the side of the handheld compartment 101 away from the adjustment mechanism 2 is a grid design with a spacing of 2mm. It can not only ensure the heat dissipation of the processor 108 and the power supply 107 during operation, but also prevent foreign objects from entering the interior. The heat dissipation efficiency can keep the temperature inside the compartment below 38℃, avoiding discomfort to the surgeon's hand.

[0036] In one embodiment of the present invention, multiple adjustment mechanisms 2 are interconnected. Each adjustment mechanism 2 includes a first mounting block 201, a second mounting block 202, a second mating plate 203, a first mating groove 204, a second threaded hole 205, a first adjustment block 206, and a second adjustment block 207. The first mounting block 201 and the second mounting block 202 are arranged in a mirror-symmetrical manner. The second mating plate 203 is provided on the top side of the first mounting block 201. The top of the second mounting block 202 has a first mating groove 204. The first mating groove 204 and the second mating plate 203 are matched with each other. A second threaded hole 205 is provided on the surface of both the first mating groove 204 and the second mating plate 203. Each second threaded hole 205 contains... Each part is equipped with a fixing bolt 105. The first adjusting block 206 and the second adjusting block 207 are located between the first mounting block 201 and the second mounting block 202. A first roller 208 is provided between the first adjusting block 206 and the first mounting block 201. Another first roller 208 is provided between the second adjusting block 207 and the second mounting block 202. A sliding block is provided on the side of the first adjusting block 206. A sliding groove is opened on the side of the first mounting block 201 near the first adjusting block 206. The sliding groove is slidably engaged with the sliding block. Another sliding block is provided on the side of the second adjusting block 207. Another sliding groove is opened on the side of the second mounting block 202 near the second adjusting block 207. The other sliding block and the other sliding groove are slidably engaged.

[0037] The first mounting block 201 and the second mounting block 202 of the adjustment mechanism 2 are made of medical-grade 316L stainless steel, which has excellent corrosion resistance and mechanical strength and can withstand the lateral and longitudinal forces during the adjustment process. Traction holes 6 are opened at the four corners of the first adjustment block 206, the second adjustment block 207, the first mounting block 201 and the second mounting block 202. The traction holes 6 pass through the first adjustment block 206, the second adjustment block 207, the first mounting block 201 and the second mounting block 202. Wire through holes 5 are opened on the sides of the first adjustment block 206, the second adjustment block 207, the first mounting block 201 and the second mounting block 202. A spring 209 is provided between the first adjustment block 206 and the second adjustment block 207. The two ends of the spring 209 are fixedly connected to the first adjustment block 206 and the second adjustment block 207 respectively.

[0038] The first adjustment block 206 and the second adjustment block 207 are made of medical titanium alloy, which is lightweight and biocompatible, and can reduce the foreign body sensation and tissue irritation when the device is implanted near the human body.

[0039] The spring 209 between the first adjusting block 206 and the second adjusting block 207 is made of medical-grade stainless steel with a wire diameter of 0.8mm, a free length of 20mm, and a stable elastic coefficient. It can provide uniform rebound force during compression and tension. When the channel length needs to be extended, the four rotating wheels 112 are rotated in opposite directions simultaneously, causing the four traction ropes 4 to relax at the same time. At this time, the rebound force of the spring 209 pushes the first adjusting block 206 and the second adjusting block 207 to move to both sides along the sliding groove. The first adjusting block 206 rotates around the first mounting block 201 via the first roller 208, and the second adjusting block 207... The segment 207 rotates around the second mounting block 202 via the first roller 208, and the axial length of the entire adjustment mechanism 2 increases accordingly. When it is necessary to shorten the channel length, the four rotating wheels 112 rotate synchronously in the forward direction. The tension generated by the winding of the traction rope 4 overcomes the elastic force of the spring 209, pulling the first adjustment block 206 and the second adjustment block 207 closer to the middle, thus shortening the channel length. The length adjustment range is 50-150mm, which can be adapted to the bone length of different parts of the adult limbs. During the adjustment process, the main body of the channel always maintains a straight line to avoid the bone plate shifting due to the change in length.

[0040] In addition, the wire through hole 5 of the adjustment mechanism 2 has an inner diameter of 3mm and the inner wall is smoothed to reduce friction loss when the wire passes through; when adjacent adjustment mechanisms 2 are connected, the fit gap between the second docking plate 203 and the first docking groove 204 is ≤0.1mm to ensure the coaxiality of the channel body and avoid jamming or offset during adjustment.

[0041] In one embodiment of the present invention, the bone plate clamping mechanism 3 includes an installation chamber 301, an installation plate 302, a second docking groove 303, a second roller 304, a side mounting block 305, a first clamping plate 306, a second clamping plate 307, a sleeve 308, and an alignment rod 309. The installation plate 302 is located at the end of the adjustment mechanism 2 away from the hand-held mechanism 1, and the installation chamber 301 is located on the side of the installation plate 302 away from the adjustment mechanism 2. A second roller 304 is provided between the installation plate 302 and the installation chamber 301, and the installation chamber 301 is rotatably connected to the installation plate 302 through the second roller 304. The second docking groove 303 is formed in the installation chamber 301. At the top of plate 302, the second mating groove 303 is matched and connected to the second mating plate 203 and fixed by fixing bolts 105. The side mounting block 305 is located on the side of the mounting chamber 301 away from the mounting plate 302. The side mounting blocks 305 are symmetrically arranged along the vertical central axis of the mounting chamber 301. The first clamping plate 306 is rotatably connected to the upper side mounting block 305 of the mounting chamber 301. The second clamping plate 307 is rotatably connected to the lower side mounting block 305 of the mounting chamber 301. The sleeve 308 is located at the bottom of the first clamping plate 306. The alignment rod 309 is located at the top of the second clamping plate 307. The sleeve 308 is matched and connected to the alignment rod 309.

[0042] The mounting chamber 301 of the bone plate clamping mechanism 3 is also made of medical ABS resin, and the internal partition 318 is made of titanium alloy, which can fix the drive motor 315 and prevent the vibration of the motor from being transmitted to the clamping end during operation.

[0043] The bone plate clamping mechanism 3 also includes a sliding groove 310, a slider, a threaded rod 311, a threaded sleeve 312, a first rotating plate 313, a second rotating plate 314, a drive motor 315, and a partition 318. The sliding groove 310 is located on the side of the mounting plate 302 near the mounting chamber 301, and the slider is located on the side of the mounting chamber 301 near the mounting plate 302. The sliding groove 310 and the slider are slidably engaged. The threaded rod 311 is located between the first clamping plate 306 and the second clamping plate 307. The drive motor 315 is located inside the mounting chamber 301, and one end of the threaded rod 311 passes through the mounting chamber 301 and extends to the mounting chamber 307. Inside the 1, the output shaft of the drive motor 315 is fixedly connected to one end of the threaded rod 311 located inside the mounting chamber 301. The partition 318 is located inside the mounting chamber 301. The base of the drive motor 315 is fixedly connected to the partition 318. The threaded rod 311 is threaded with a threaded sleeve 312 on one end outside the mounting chamber 301. The first rotating plate 313 and the second rotating plate 314 are rotatably connected to the top and bottom of the threaded sleeve 312, respectively. The ends of the first rotating plate 313 and the second rotating plate 314 away from the threaded sleeve 312 are rotatably connected to the first clamping plate 306 and the second clamping plate 307, respectively.

[0044] The bone plate clamping mechanism 3 also includes a camera 316, a connecting wire 317, and an image processing module 319. The camera 316 is located on the side of the mounting chamber 301 away from the mounting plate 302. The image processing module 319 is located inside the mounting chamber 301. The connecting wire 317 connects the camera 316 and the image processing module 319. The image processing module 319 is electrically connected to the processor 108 and the power supply 107 through the wire passing through the wire hole 5.

[0045] The bone plate clamping mechanism 3 is responsible for fixing the bone plate and acquiring deep images. Its clamping action is driven by a micro stepper motor, which has high precision and strong stability. The drive motor 315 is a medical-grade micro stepper motor with a torque of 0.5 N·m and adjustable speed. It is fixed to the partition 318 inside the installation chamber 301 by a titanium alloy bracket. The motor output shaft and the threaded rod 311 are connected by a key to ensure stable power transmission. The threaded rod 311 is made of titanium alloy and has a precision trapezoidal thread with a pitch of 1 mm. The threaded sleeve 312 is made of polyetheretherketone (PEEK) and has a clearance of ≤0.05 mm with the threaded rod 311, which can avoid changes in clamping force caused by loosening of the thread.

[0046] When holding the bone plate, first start the drive motor 315 to rotate forward using the operation button 103. The motor drives the threaded rod 311 to rotate, and the threaded sleeve 312 moves along the threaded rod 311 away from the mounting chamber 301. At this time, the first rotating plate 313 at the top of the threaded sleeve 312 and the second rotating plate 314 at the bottom expand outward synchronously, pushing the first clamping plate 306 and the second clamping plate 307 to rotate around the side mounting block 305, increasing the distance between them. Align the screw holes of the bone plate with the titanium alloy sleeve at the bottom of the first clamping plate 306. The titanium alloy alignment rod 309 on the top of the sleeve 308 and the second clamping plate 307 are adapted to the screw holes of the bone plate, enabling precise positioning of the bone plate. Then, the drive motor 315 is started in reverse, and the threaded sleeve 312 moves towards the installation chamber 301. The first rotating plate 313 and the second rotating plate 314 pull the first clamping plate 306 and the second clamping plate 307 to close until the bone plate is clamped. The clamping force can be adjusted through motor current feedback to ensure the bone plate is firmly fixed and not damaged. Medical silicone pads, 1mm thick, with anti-slip textures are attached to the clamping surfaces of the first clamping plate 306 and the second clamping plate 307. This protects the bone plate surface from scratches and increases clamping friction, preventing displacement of the bone plate during channel movement.

[0047] The camera 316 of the bone plate clamping mechanism 3 is a miniature high-definition medical camera with 2 million pixels and 6 miniature LED supplementary lights. The supplementary light brightness can be adjusted by the operation button 103. It can clearly capture the bone surface condition, bone plate position and screw hole alignment in low light environments such as deep muscle gaps. The camera 316 is connected to the image processing module 319 inside the installation compartment 301 through a medical silicone cable. The image processing module 319 can perform noise reduction and sharpening processing on the image captured by the camera 316, and then transmit the processed image signal to the processor 108 in the handheld compartment 101 through the wire, and finally display it in real time on the display screen 102. By observing the display screen 102, the surgeon can accurately judge whether the bone plate has reached the preset position, avoiding the positional deviation caused by relying on experience judgment in traditional surgery, and greatly reducing soft tissue damage caused by repeated adjustments.

[0048] Working principle: During assembly, first connect the handheld mechanism 1 with the first adjustment mechanism 2. The first docking plate 104 on the side of the handheld compartment 101 closest to the adjustment mechanism 2 is aligned with the first docking groove 204 on the top of the second mounting block 202 in the adjustment mechanism 2. After the first threaded hole 106 on the surface of the first docking plate 104 and the second threaded hole 205 on the surface of the first docking groove 204 are coaxial, insert and tighten the medical titanium alloy fixing bolt 105 to achieve a rigid connection between the two. Then, according to the length of the patient's bones, increase or decrease the number of adjustment mechanisms 2. Adjacent adjustment mechanisms 2 are locked with titanium alloy fixing bolts 105 through the nesting cooperation of the second docking plate 203 and the first docking groove 204, forming a continuous channel body. Then, the traction rope 4 and guide are threaded through. The traction rope 4 is made of medical high-strength nylon rope with a diameter of 1.2mm. It is wear-resistant and has a certain degree of elasticity to prevent breakage during adjustment. The four traction ropes 4 are inserted into the traction holes 6 at the four corners of the handheld compartment 101, and pass through the traction holes 6 at the four corners of each adjustment mechanism 2 in sequence. Finally, they are fixedly connected to the side wall of the installation compartment 301 of the bone plate clamping mechanism 3. The connection point between the traction rope 4 and the installation compartment 301 is reinforced with titanium alloy buckles to prevent loosening. The wire is made of medical insulated silicone wire. One end is connected to the image processing module 319 of the bone plate clamping mechanism 3, and the other end passes through the wire through hole 5 on the side of the adjustment mechanism 2 and extends into the handheld compartment 101 to form an electrical connection with the processor 108 and the power supply 107 to ensure stable transmission of image signals and control signals.

[0049] Preoperative preparation: Based on the patient's CT data, plan the bone plate implantation position, screw angle and channel length on the computer, select an appropriate number of adjustment mechanisms 2, complete the device assembly and debugging, and ensure that the camera 316 image is clear and all adjustment functions are normal.

[0050] Channel establishment: The surgeon makes 2-3 small incisions at the fracture site, holds the holding chamber 101 with one hand, inserts the bone plate clamping mechanism 3 (with the bone plate already clamped) through the incision, and pushes it along the intermuscular space toward the fracture area; during the advancement, the surgeon observes the deep image through the display screen 102, rotates the corresponding rotating wheel 112 to adjust the channel angle, and simultaneously fine-tunes the channel length to ensure that the bone plate moves along the planned path;

[0051] Bone plate fixation: When the display screen 102 shows that the bone plate has reached the preset position, the surgeon inserts locking screws or cortical bone screws through the incision to complete the fracture fixation; then the operation button 103 controls the drive motor 315 to reverse, the first clamping plate 306 and the second clamping plate 307 release the bone plate, and the device is slowly withdrawn from the incision.

[0052] Postoperative care: The device was disassembled into a handheld mechanism 1, an adjustment mechanism 2, and a bone plate clamping mechanism 3, and each part was sterilized under high temperature and high pressure for future use.

[0053] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A percutaneous minimally invasive bone plate fixation channel with adjustable angle and length for trauma orthopedics, characterized in that: The device includes a hand-held mechanism (1) for the surgeon to hold, an adjustment mechanism (2) for establishing a bone-setting channel, and a bone-setting plate clamping mechanism (3). Several adjustment mechanisms (2) are provided, and each adjustment mechanism (2) has the same structural shape. The bone-setting plate clamping mechanism (3) is used to clamp the bone plate. The adjustment mechanism (2) is used to adjust the length of the bone-setting channel. The hand-held mechanism (1) is used to control the angle and length adjustment of the bone-setting channel. The bone-setting plate clamping mechanism (3) is located at the front end of the bone-setting channel, and the hand-held mechanism (1) is located at the rear end of the bone-setting channel. The handheld mechanism (1) includes a handheld compartment (101), a winding wheel (110), a rotating component (111), and a rotating wheel (112). The handheld compartment (101) has traction holes (6) at each of its four corners near the bone-setting channel. Each traction hole (6) contains a traction rope (4), which passes through each adjusting mechanism (2) and is fixedly connected to the bone-setting plate clamping mechanism (3). Four winding wheels (110) are provided. All four traction ropes (4) are located inside the handheld compartment (101). The four traction ropes (4) are respectively wound around the surface of the four winding wheels (110). Each winding wheel (110) has a rotating part (111) on the side near the outside of the handheld compartment (101). Each rotating part (111) passes through the handheld compartment (101) and extends to the outside of the handheld compartment (101). Each rotating part (111) located outside the handheld compartment (101) has a rotating wheel (112) at its top.

2. The adjustable angle and length percutaneous minimally invasive bone plate fixation channel for trauma orthopedics according to claim 1, characterized in that: The handheld mechanism (1) further includes a first docking plate (104), which is located on the side of the handheld compartment (101) near the adjustment mechanism (2). A first threaded hole (106) is provided on the surface of the first docking plate (104), and a fixing bolt (105) is provided inside the first threaded hole (106).

3. The adjustable angle and length percutaneous minimally invasive bone plate fixation channel for trauma orthopedics according to claim 1, characterized in that: The handheld mechanism (1) also includes a display screen (102), an operation button (103), a power supply (107), a processor (108), and a heat sink (109). The display screen (102) is located on the top of the handheld compartment (101), the operation button (103) is located on the side of the display screen (102), the power supply (107) and the processor (108) are both located inside the handheld compartment (101), and the power supply (107), the processor (108), the display screen (102) and the operation button (103) are electrically connected to each other. The heat sink (109) is opened on the side of the handheld compartment (101) away from the adjustment mechanism (2).

4. The adjustable angle and length percutaneous minimally invasive bone plate fixation channel for trauma orthopedics according to claim 1, characterized in that: Multiple adjustment mechanisms (2) are interconnected. Each adjustment mechanism (2) includes a first mounting block (201), a second mounting block (202), a second mating plate (203), a first mating groove (204), a second threaded hole (205), a first adjustment block (206), and a second adjustment block (207). The first mounting block (201) and the second mounting block (202) are arranged in a mirror symmetrical manner. The top side of the first mounting block (201) is provided with a second mating plate (203), and the top of the second mounting block (202) is provided with a first mating groove (204). The first mating groove (204) and the second mating plate (203) are matched with each other, and the surfaces of the first mating groove (204) and the second mating plate (203) are provided with second threaded holes (205). Each second threaded hole (205) is provided with a fixing device inside. Bolt (105), the first adjusting block (206) and the second adjusting block (207) are located between the first mounting block (201) and the second mounting block (202), a first roller (208) is provided between the first adjusting block (206) and the first mounting block (201), another first roller (208) is provided between the second adjusting block (207) and the second mounting block (202), a sliding block is provided on the side of the first adjusting block (206), a sliding groove is provided on the side of the first mounting block (201) near the first adjusting block (206), the sliding groove is slidably engaged with the sliding block, another sliding block is provided on the side of the second adjusting block (207), another sliding groove is provided on the side of the second mounting block (202) near the second adjusting block (207), the other sliding block and the other sliding groove are slidably engaged.

5. The adjustable angle and length percutaneous minimally invasive bone plate fixation channel for trauma orthopedics according to claim 4, characterized in that: The first adjusting block (206), the second adjusting block (207), the first mounting block (201), and the second mounting block (202) are provided with traction holes (6) at their four corners. The traction holes (6) pass through the first adjusting block (206), the second adjusting block (207), the first mounting block (201), and the second mounting block (202). The first adjusting block (206), the second adjusting block (207), the first mounting block (201), and the second mounting block (202) are provided with wire through holes (5) on their sides. The wire through holes (5) pass through the first adjusting block (206), the second adjusting block (207), the first mounting block (201), and the second mounting block (202). A spring (209) is provided between the first adjusting block (206) and the second adjusting block (207). The two ends of the spring (209) are fixedly connected to the first adjusting block (206) and the second adjusting block (207), respectively.

6. The adjustable angle and length percutaneous minimally invasive bone plate fixation channel for trauma orthopedics according to claim 4, characterized in that: The bone plate clamping mechanism (3) includes an installation chamber (301), an installation plate (302), a second docking groove (303), a second roller (304), a side mounting block (305), a first clamping plate (306), a second clamping plate (307), a sleeve (308), and an alignment rod (309). The installation plate (302) is located at the end of the adjustment mechanism (2) away from the hand-held mechanism (1). The installation chamber (301) is located on the side of the installation plate (302) away from the adjustment mechanism (2). A second roller (304) is provided between the installation plate (302) and the installation chamber (301). The installation chamber (301) is rotatably connected to the installation plate (302) through the second roller (304). The second docking groove (303) is formed in the installation plate (302). At the top, the second docking groove (303) is matched and connected to the second docking plate (203) and fixed by fixing bolts (105). The side mounting block (305) is located on the side of the mounting chamber (301) away from the mounting plate (302). The side mounting block (305) is symmetrically arranged along the vertical central axis of the mounting chamber (301). The first clamping plate (306) is rotatably connected to the upper side mounting block (305) of the mounting chamber (301). The second clamping plate (307) is rotatably connected to the lower side mounting block (305) of the mounting chamber (301). The sleeve (308) is located at the bottom of the first clamping plate (306). The alignment rod (309) is located at the top of the second clamping plate (307). The sleeve (308) is matched and connected to the alignment rod (309).

7. The percutaneous minimally invasive bone plate fixation channel with adjustable angle and length for trauma orthopedics according to claim 6, characterized in that: The bone plate clamping mechanism (3) further includes a sliding groove (310), a slider, a threaded rod (311), a threaded sleeve (312), a first rotating plate (313), a second rotating plate (314), a drive motor (315), and a partition (318). The sliding groove (310) is located on the side of the mounting plate (302) near the mounting chamber (301), and the slider is located on the side of the mounting chamber (301) near the mounting plate (302). The sliding groove (310) is slidably engaged with the slider. The threaded rod (311) is located between the first clamping plate (306) and the second clamping plate (307). The drive motor (315) is located inside the mounting chamber (301), and one end of the threaded rod (311) passes through the mounting chamber (301) and extends to the mounting plate. Inside the chamber (301), the output shaft of the drive motor (315) is fixedly connected to one end of the threaded rod (311) located inside the installation chamber (301). The partition (318) is located inside the installation chamber (301). The base of the drive motor (315) is fixedly connected to the partition (318). The threaded rod (311) is threaded with a threaded sleeve (312) on one end outside the installation chamber (301). The first rotating plate (313) and the second rotating plate (314) are rotatably connected to the top and bottom of the threaded sleeve (312) respectively. The ends of the first rotating plate (313) and the second rotating plate (314) away from the threaded sleeve (312) are rotatably connected to the first clamping plate (306) and the second clamping plate (307) respectively.

8. The adjustable angle and length percutaneous minimally invasive bone plate fixation channel for trauma orthopedics according to claim 2, characterized in that: The bone plate clamping mechanism (3) also includes a camera (316), a connecting wire (317), and an image processing module (319). The camera (316) is located on the side of the mounting chamber (301) away from the mounting plate (302). The image processing module (319) is located inside the mounting chamber (301). The connecting wire (317) connects the camera (316) and the image processing module (319). The image processing module (319) is electrically connected to the processor (108) and the power supply (107) through a wire passing through a wire hole (5).

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