Minimally invasive distraction instrument for spinal fracture reduction

Abstract

The invention provides a minimally invasive distraction instrument for spinal fracture reduction, and relates to the technical field of medical instruments.The minimally invasive distraction instrument comprises a base, a supporting structure and a moving structure are arranged on the base, a fixing structure and a mounting structure are arranged on the supporting structure, an auxiliary distraction structure is arranged on the mounting structure, and a distraction structure is arranged in the mounting structure; a clamping structure is arranged at the bottom of the opening structure, a connecting structure is arranged between the opening structure and the clamping structure, the clamping structure comprises a connecting block, a fine adjustment structure is rotationally matched with the lower side of the connecting block, and a clamping plate is arranged on one side of the fine adjustment structure. According to the bone nail distraction device, the supporting structure and the moving structure are mounted on the base, the fixing structure and the mounting structure are mounted on the supporting structure, the auxiliary distraction structure and the distraction structure are arranged on the mounting structure, and the bone nails can be driven to move through the distraction structure, so that the bone nails can be driven to perform distraction action and can also be subjected to traction work; therefore, the application range of the device is expanded.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a minimally invasive distraction device for spinal fracture reduction. BACKGROUND

[0002] There are two main ways to correct spinal vertebral fractures in spinal surgery: one is to use a pedicle screw rod system to distract, reduce, correct and fix the spine through open or minimally invasive surgery, which is traumatic, expensive and has a long postoperative recovery period, and is not suitable for elderly patients. The other is to use an external fixator to fix the spine through minimally invasive surgery, which is less traumatic, less expensive and can resume normal life after the external fixator is removed, which is a good way to treat elderly compression fractures. However, this surgery mainly uses prying to restore the shape of the vertebral body, and the longitudinal distraction and compression functions are limited. In addition, due to the complexity of the patient's actual situation and the limitations of the vertebral body, the two pedicle screws may be in different planes. When the two pedicle screws are not in the same plane, the existing distraction device is usually difficult to fix the pedicle screws, thereby making it difficult to achieve good distraction effect.

[0003] Therefore, the present application provides a minimally invasive distraction device for spinal fracture reduction. SUMMARY

[0004] In view of the deficiencies of the prior art, the present application aims to provide a minimally invasive distraction device for spinal fracture reduction to solve the problems raised in the background art. The present application can pull the bone screws, thereby expanding the application range of the device, and the distance of distraction by the two bone screws can be adjusted in real time. Compared with the existing distraction method in which the two bone screws move the same distance, the device is more flexible to use, can ensure the stability of the device during distraction, thereby ensuring the safety of the surgery, facilitates distraction, allows the device to be adjusted more flexibly according to the actual situation of the patient, thereby ensuring the distraction effect of the device, expanding the application range of the device, ensuring the fixation of the position of the bone screws after distraction, facilitating subsequent work and ensuring the success of the surgery. The fine adjustment structure can ensure the stability of the device during distraction, ensure the precise control of the distraction distance, ensure the effect of the surgery and prevent secondary injury to the patient.

[0005] In order to achieve the above object, the present application is realized by the following technical scheme: A minimally invasive distraction instrument for spinal fracture reduction, comprising a base, the base is provided with a support structure and a moving structure, the support structure is provided with a fixing structure and a mounting structure, the mounting structure is provided with an auxiliary distraction structure, the mounting structure is provided with a distraction structure, the bottom of the distraction structure is provided with a clamping structure, the distraction structure and the clamping structure are provided with a connecting structure, the clamping structure comprises a connecting block, the lower side of the connecting block is rotatably connected with a fine adjustment structure, one side of the fine adjustment structure is provided with a clamping plate, the clamping plate and the fine adjustment structure are provided with a positioning structure, the clamping structure is provided with a bone screw, the bone screw corresponds to the positioning structure and the fine adjustment structure.

[0006] Further, the moving structure comprises a plurality of universal wheels fixed to the lower side of the base, the support structure comprises a support rod fixed to the base, the fixing structure comprises a clamping block fixed to the support rod, the clamping block is made of elastic material, the clamping block is C-shaped structure, the support rod is L-shaped structure, the support rod is slidably connected with a connecting frame, the support rod is threadedly connected with a fixing bolt, the connecting frame is provided with a bolt groove corresponding to the fixing bolt, the mounting structure comprises a fixing frame, the fixing frame is fixedly connected with the connecting frame.

[0007] Further, the auxiliary distraction structure comprises a display screen fixed to the side of the fixing frame and a first camera fixed to the lower side of the fixing frame, a plurality of fill light lamps are fixed to the lower side of the fixing frame, the first camera is connected with the display screen through a data line, the distraction structure comprises a first sliding block slidably connected in the fixing frame, the first sliding block is fixed with a first sliding rod, the first sliding rod is slidably connected with a second sliding rod, the end of the second sliding rod is fixed with a mounting frame.

[0008] Further, the fixing frame is provided with a first sliding groove, the first sliding groove corresponds to the first sliding block, the first sliding groove is rotatably connected with a first screw rod, the first screw rod is threadedly connected with the first sliding block, the end of the fixing frame is fixed with a first motor, the output end of the first motor is connected with the first screw rod, the fixing frame is provided with a limiting structure, the limiting structure corresponds to the first sliding block, the limiting structure comprises a plurality of limiting blocks, the fixing frame is provided with a plurality of first recesses, the first recesses correspond to the limiting blocks, the first spring is fixed between the groove wall of the first recess and the limiting block, a plurality of first electromagnets are fixed in the fixing frame, the first electromagnets correspond to the limiting blocks.

[0009] Further, the first sliding rod is provided with a second sliding groove, the second sliding groove corresponds to the second sliding rod, the first sliding rod is fixed with a second motor, the output end of the second motor is fixed with a second screw rod, the second screw rod is threadedly connected with the second sliding rod.

[0010] Further, the mounting frame is slidably connected with a second sliding block, the mounting frame is rotatably connected with a third screw rod, the third screw rod is threadedly connected with the second sliding block, a third motor is fixed on one side of the mounting frame, the output end of the third motor is fixedly connected with the third screw rod, and the second sliding block corresponds to the connecting structure.

[0011] Further, the connecting structure comprises a first clamping block fixed on the connecting block, a first clamping groove is formed in the second sliding block and corresponds to the first clamping block, a second electromagnet is fixed in the second sliding block and corresponds to the first clamping block, and the fine adjustment structure comprises a clamping frame rotatably connected with the connecting block.

[0012] Further, a ball head is fixed on the clamping frame, a ball groove is formed in the connecting block and corresponds to the ball head, a third sliding groove is formed in the clamping frame and corresponds to the clamping plate, a first through groove is formed in the ball head, a fixed rod is slidably connected in the first through groove, and a frictional pattern is arranged on the end of the fixed rod close to the groove wall of the ball groove.

[0013] Further, the positioning structure comprises a push rod slidably connected in the third sliding groove, the push rod is fixedly connected with the clamping plate, a second recess is formed in the clamping frame, a third electromagnet is fixed in the second recess, a second clamping block is slidably connected in the second recess, a plurality of second springs are arranged between the second clamping block and the groove wall of the second recess, a second clamping groove is formed in the fixed rod, a third clamping groove is formed in the push rod, and the second clamping groove and the third clamping groove are both fixedly connected with the second clamping block.

[0014] Further, a third spring is arranged between the third sliding groove and the clamping plate, a plurality of auxiliary blocks are fixed on the clamping plate and the clamping frame, a plurality of auxiliary grooves are formed in the circumferential side of the bone pin and correspond to the auxiliary blocks, a second through groove is formed in the bone pin, a positioning rod is clamped and fixed on one side of the clamping frame and corresponds to the second through groove, a third clamping block is fixed on the positioning rod, a fourth clamping groove is formed in the clamping frame and corresponds to the third clamping block, a second camera is fixed on the clamping frame, and the second camera is connected with the display screen through a data line.

[0015] The beneficial effects of the present application are as follows: 1. The support structure and moving structure are installed on the base, the fixed structure and mounting structure are installed on the support structure, the auxiliary distraction structure and distraction structure are arranged on the mounting structure, the bone nail can be moved by the distraction structure, so that not only the distraction action of the bone nail can be driven, but also the bone nail can be pulled, thereby expanding the application range of the device, and the distance of the two bone nails pulled and distracted can be adjusted in real time, compared with the existing distraction method of the same moving distance of the two bone nails, the device is more flexible to use, and the device can be moved by the moving structure, and the placement position of the device is fixed by the fixed structure, so that the stability of the device during distraction can be ensured, thereby ensuring the safety of the operation.

[0016] 2. The fine adjustment structure is rotatably installed on the lower side of the connecting block, so that the device can adapt to the angle of the bone nail, the device can better fix the bone nail, thereby facilitating distraction, the device can be more flexibly adjusted according to the actual situation of the patient, thereby ensuring the distraction effect of the device, expanding the application range of the device, and the connecting block can be separately detached, so that the fixation of the bone nail position after distraction can be ensured, and subsequent work is facilitated, thereby ensuring the success of the operation.

[0017] 3. The positioning structure is installed between the clamping plate and the fine adjustment structure, the fine adjustment structure can be fixed by the positioning structure, so that the stability of the fine adjustment structure during distraction can be ensured, the precision control of the distraction distance can be ensured, the effect of the operation can be ensured, and secondary harm to the patient can be prevented. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a whole assembly perspective structure schematic view of the minimally invasive distraction instrument for spinal fracture reduction of the application; Figure 2 It is a whole assembly cross-sectional structure schematic view of the minimally invasive distraction instrument for spinal fracture reduction of the application; Figure 3 It is Figure 2 It is a schematic view of A in the middle; Figure 4 It is a whole assembly perspective structure schematic view of the fixed frame in the minimally invasive distraction instrument for spinal fracture reduction of the application; Figure 5 It is a whole assembly perspective structure schematic view of the support rod and the base in the minimally invasive distraction instrument for spinal fracture reduction of the application; Figure 6 It is a whole assembly cross-sectional structure schematic view of the fixed frame in the minimally invasive distraction instrument for spinal fracture reduction of the application; Figure 7 It is an assembly structure schematic view of the fixed frame and the first sliding block in the minimally invasive distraction instrument for spinal fracture reduction of the application; Figure 8 It is a three-dimensional structure diagram of the assembly of the mounting frame of the minimally invasive distraction instrument for the reduction of spinal fractures of the application; Figure 9 It is a sectional structure diagram of the assembly of the mounting frame of the minimally invasive distraction instrument for the reduction of spinal fractures of the application; Figure 10 It is Figure 9 the schematic diagram at B; Figure 11 It is Figure 9 the schematic diagram at C; In the figure: 1, base; 2, universal wheel; 3, clamping block; 4, connecting frame; 5, fixed frame; 6, display screen; 7, light supplement lamp; 8, first camera; 9+, first motor; 10, first screw rod; 11, first sliding block; 12, second motor; 13, second screw rod; 14, first sliding rod; 15, first sliding groove; 16, second sliding groove; 17, second sliding rod; 18, limiting block; 19, first recess; 20, first spring; 21, first electromagnet; 22, mounting frame; 23, third motor; 24, third screw rod; 25, second sliding block; 26, second electromagnet; 27, first clamping groove; 28, first clamping block; 29, connecting block; 30, ball groove; 31, ball head; 32, first through groove; 33, fixed rod; 34, clamping frame; 35, second recess; 36, third electromagnet; 37, second clamping groove; 38, second clamping block; 39, second spring; 40, third clamping groove; 41, push rod; 42, third sliding groove; 43, clamping plate; 44, third spring; 45, bone nail; 46, second through groove; 47, positioning rod; 48, fourth clamping groove; 49, third clamping block; 50, auxiliary groove; 51, auxiliary block; 52, second camera; 53, support rod. DETAILED DESCRIPTION

[0019] In order to make the technical means, creative features, purposes and effects realized by the application easy to understand, the application is further described below in combination with specific embodiments.

[0020] Please refer to Figures 1 to 11 The application provides a technical solution: a minimally invasive distraction instrument for the reduction of spinal fractures, comprising a base 1, wherein the base 1 is provided with a support structure and a moving structure, the support structure is provided with a fixed structure and a mounting structure, the mounting structure is provided with an auxiliary distraction structure, the mounting structure is provided with a distraction structure, the bottom of the distraction structure is provided with a clamping structure, the distraction structure and the clamping structure are provided with a connecting structure, the clamping structure comprises a connecting block 29, the lower side of the connecting block 29 is rotationally connected with a fine adjustment structure, one side of the fine adjustment structure is provided with a clamping plate 43, the clamping plate 43 and the fine adjustment structure are provided with a positioning structure, the clamping structure is provided with a bone nail 45, and the bone nail 45 corresponds to the positioning structure and the fine adjustment structure.

[0021] In the embodiment, the moving structure comprises a plurality of universal wheels 2 fixed to the lower side of the base 1, the supporting structure comprises a supporting rod 53 fixed to the base 1, and the fixing structure comprises a clamping block 3 fixed to the supporting rod 53. The clamping block 3 is made of elastic material and has a C-shaped structure. The supporting rod 53 has an L-shaped structure, and a connecting frame 4 is slidingly fitted on the supporting rod 53. A fixing bolt is threadedly fitted on the supporting rod 53, and a bolt groove corresponding to the fixing bolt is formed in the connecting frame 4. The mounting structure comprises a fixed frame 5 fixedly connected with the connecting frame 4.

[0022] Specifically, the base 1 can be moved by the universal wheels 2, so as to facilitate the movement of the device. When the distraction work is needed, the device is moved to the side of the hospital bed, so that the clamping block 3 clamps the bed frame of the hospital bed, thereby fixing the device, preventing the device from moving during the distraction work, ensuring the stability of the device, and ensuring the safety of the operation. When the distraction work is not performed, the device can be moved at will, thereby preventing the device from affecting the normal action of the doctor, ensuring the success rate of the operation, and the connecting frame 4 can be slid, so as to preliminarily adjust the position of the device according to the position of the patient, so that the position of the device can better perform the distraction work, and the flexibility of the device adjustment is ensured.

[0023] The auxiliary distraction structure comprises a display screen 6 fixed to the side surface of the fixed frame 5 and a first camera 8 fixed to the lower side of the fixed frame 5. A plurality of light supplement lamps 7 are fixed to the lower side of the fixed frame 5. The first camera 8 is connected with the display screen 6 through a data line. The distraction structure comprises a first sliding block 11 slidingly fitted in the fixed frame 5. The first sliding block 11 has a first sliding rod 14 fixed to the lower side. The first sliding rod 14 has a second sliding rod 17 slidingly fitted therein. The second sliding rod 17 has a mounting frame 22 fixed to the end portion.

[0024] Specifically, the distraction position can be monitored by the first camera 8, and then displayed on the display screen 6, so as to monitor the distraction position, prevent the limitation of the device from causing poor vision during distraction, ensure that the distraction position can be observed and judged, prevent the distraction distance from being too large or too small due to limited vision, ensure the effect of distraction, and ensure the success rate of the operation. The distraction can be performed by sliding the first sliding block 11, and the traction work can be performed by sliding the second sliding rod 17, so as to expand the range of the operation. The two first sliding blocks 11 and the two second sliding rods 17 can work separately, so as to adjust the moving position of the bone nail 45 according to the need, so that the device is more flexible to use, and the device is suitable for people with different conditions.

[0025] The first sliding slot 15 is arranged in the fixing frame 5 and corresponds to the first sliding block 11, the first screw rod 10 is rotationally arranged in the first sliding slot 15, the first screw rod 10 is threadedly connected with the first sliding block 11, the first motor 9 is fixed to the end of the fixing frame 5, the output end of the first motor 9 is connected with the first screw rod 10, the limiting structure is arranged in the fixing frame 5 and corresponds to the first sliding block 11, the limiting structure comprises a plurality of limiting blocks 18, a plurality of first grooves 19 are arranged in the fixing frame 5 and correspond to the limiting blocks 18, the first spring 20 is fixed between the groove wall of the first groove 19 and the limiting block 18, and the first electromagnet 21 is fixed in the fixing frame 5 and corresponds to the limiting block 18.

[0026] Specifically, when the distraction needs to be performed, the bone nail 45 is fixed through the clamping frame 34 and the clamping plate 43, then the first motor 9 is started, the first motor 9 drives the first screw rod 10 to rotate, the first sliding block 11 is pushed to move, and the distraction action is performed, when the maximum range of distraction needs to be limited, the first electromagnet 21 is electrified, the first electromagnet 21 adsorbs the limiting block 18, the limiting block 18 slides downward in the opposite direction, the first spring 20 is stretched, the sliding of the first sliding block 11 is limited through the limiting block 18, the sliding distance of the first sliding block 11 is limited, and the secondary injury to the patient caused by the excessive sliding distance of the first sliding block 11 is prevented, so that the safety of the operation is ensured.

[0027] The second sliding slot 16 is arranged in the first sliding rod 14 and corresponds to the second sliding rod 17, the second motor 12 is fixed in the first sliding rod 14, the output end of the second motor 12 is fixed with the second screw rod 13, and the second screw rod 13 is threadedly connected with the second sliding rod 17.

[0028] When the second sliding rod 17 needs to slide up and down, the second motor 12 is started, the second motor 12 drives the second sliding rod 17 to slide up and down, the traction work is performed, and when the bone nail 45 needs to be clamped and fixed, the clamping frame 34 and the clamping plate 43 are close to the bone nail 45 by sliding the second sliding rod 17 up and down, so that the bone nail 45 is clamped, the position of the bone nail 45 is adapted, the flexibility of the device is improved, and the application range of the device is widened.

[0029] The second sliding block 25 is slidably arranged in the mounting frame 22, the third screw rod 24 is rotationally arranged in the mounting frame 22 and is threadedly connected with the second sliding block 25, the third motor 23 is fixed to one side of the mounting frame 22, the output end of the third motor 23 is fixedly connected with the third screw rod 24, and the second sliding block 25 corresponds to the connecting structure.

[0030] Specifically, when the bone nail 45 is clamped and fixed, the third motor 23 is started, so that the third motor 23 drives the third screw rod 24 to rotate, thereby driving the second sliding block 25 to move, that is, the position of the clamping frame 34 can be adjusted, so that the clamping frame 34 can better clamp the bone nail 45.

[0031] The connecting structure comprises a first clamping block 28 fixed to the connecting block 29, a first clamping groove 27 is formed in the second sliding block 25, the first clamping groove 27 corresponds to the first clamping block 28, a second electromagnet 26 is fixed in the second sliding block 25, the second electromagnet 26 corresponds to the first clamping block 28, and the fine adjustment structure comprises a clamping frame 34 rotationally connected with the connecting block 29.

[0032] Specifically, after the distraction is completed, the second electromagnet 26 can be powered off, so that the second electromagnet 26 no longer adsorbs and fixes the first clamping block 28, thereby sliding the second sliding rod 17 upward, so that the first clamping block 28 is separated from the first clamping groove 27, and the connecting block 29 can be disassembled, at this time, a telescopic rod with the same structure as the second sliding block 25 can be fixed with the connecting block 29, that is, the fixed frame 5 can be moved away on the basis of ensuring the position of the bone nail 45, thereby facilitating subsequent work, preventing the fixed frame 5 from limiting the surgical field, thereby ensuring the success rate of the operation, and at this time, the second camera 52 can be used for auxiliary monitoring, thereby ensuring the effect of the operation.

[0033] The ball head 31 is fixed on the clamping frame 34, the ball groove 30 is arranged in the connecting block 29, the ball groove 30 corresponds to the ball head 31, the third sliding groove 42 is arranged in the clamping frame 34, the third sliding groove 42 corresponds to the clamping plate 43, the first through groove 32 is arranged in the ball head 31, the fixed rod 33 is slidably arranged in the first through groove 32, the end of the fixed rod 33 close to the groove wall of the ball groove 30 is provided with a friction pattern, the positioning structure comprises the push rod 41 slidably arranged in the third sliding groove 42, the push rod 41 is fixedly connected with the clamping plate 43, the second recess 35 is arranged in the clamping frame 34, the third electromagnet 36 is fixedly arranged in the second recess 35, the second clamping block 38 is slidably arranged in the second recess 35, a plurality of second springs 39 are fixedly arranged between the second clamping block 38 and the groove wall of the second recess 35, the second clamping groove 37 is arranged in the fixed rod 33, the third clamping groove 40 is arranged in the push rod 41, the second clamping groove 37 and the third clamping groove 40 are both adsorbed and fixed with the second clamping block 38, the third spring 44 is fixedly arranged between the third sliding groove 42 and the clamping plate 43, a plurality of auxiliary blocks 51 are fixedly arranged on the clamping plate 43 and the clamping frame 34, a plurality of auxiliary grooves 50 are arranged on the periphery of the bone pin 45, the auxiliary grooves 50 correspond to the auxiliary blocks 51, the second through groove 46 is arranged in the bone pin 45, the positioning rod 47 is clamped and fixed on one side of the clamping frame 34, the positioning rod 47 corresponds to the second through groove 46, the third clamping block 49 is fixedly arranged on the positioning rod 47, the fourth clamping groove 48 is arranged in the clamping frame 34, the fourth clamping groove 48 corresponds to the third clamping block 49, the second camera 52 is fixedly arranged on the clamping frame 34, and the second camera 52 is connected with the display screen 6 through a data line.

[0034] Specifically, when the bone nail 45 needs to be clamped, the ball head 31 can be manually adjusted with tweezers, so that the ball head 31 drives the clamping frame 34 to rotate, and when it is rotated to the appropriate angle, the clamping plate 43 is manually pulled with tweezers at this time, so that the third spring 44 is compressed, so that the clamping plate 43 no longer limits the bone nail 45, so that the positioning rod 47 is inserted into the second through slot 46, and when it is inserted, the clamping frame 34 is loosened at this time, and the third spring 44 rebounds to drive the clamping frame 34 to move, thereby driving the auxiliary block 51 to insert into the auxiliary slot 50 to assist in fixing the bone nail 45, when the positioning rod 47 is not used, the auxiliary block 51 and the auxiliary slot 50 can also ensure the fixing effect of the bone nail 45, and the clamping plate 43 slides at the same time. Energize the third electromagnet 36 to make the third electromagnet 36 adsorb the second clamping block 38, so that the second clamping block 38 is separated from the second clamping groove 37, when the clamping plate 43 resets, the clamping plate 43 drives the push rod 41 to move, so that the push rod 41 extrudes the fixing rod 33 to move upward, so that the fixing rod 33 and the groove wall of the ball groove 30 rub to fix the ball head 31, then the third electromagnet 36 is de-energized, so that the second spring 39 rebounds to drive the second clamping block 38 to move upward into the third clamping groove 40, thereby fixing the position of the clamping plate 43 and the push rod 41, thereby ensuring the stability of the device when clamping the bone nail 45, thereby ensuring the safety of the operation, so that the device can be adapted to different patients with different diseases, and the device can be rotated and adjusted according to the different positions of the spine, so that the device is more flexible to use, and the application range of the device is expanded.

[0035] Workflow: The base 1 can be moved by the universal wheel 2, so as to facilitate the movement of the device, when the distraction work is needed, the device is moved to the side of the bed, so that the clamping block 3 clamps the bed frame, and then the second motor 12 is started, so that the second motor 12 drives the second sliding rod 17 to slide up and down, that is, the traction work can be carried out, and when the bone nail 45 needs to be clamped and fixed, the second sliding rod 17 can be slid up and down to make the clamping frame 34 and the clamping plate 43 close to the bone nail 45, so as to facilitate the clamping of the bone nail 45, the third motor 23 is started, so that the third motor 23 drives the third screw 24 to rotate, thereby driving the second sliding block 25 to move, that is, the position of the clamping frame 34 can be adjusted, so that the clamping frame 34 can better clamp the bone nail 45, when the bone nail 45 needs to be clamped, the ball head 31 can be manually adjusted with forceps, so that the ball head 31 drives the clamping frame 34 to rotate, when it is rotated to the appropriate angle, the clamping plate 43 is manually pulled with forceps at this time, so that the third spring 44 is compressed, so that the clamping plate 43 no longer limits the bone nail 45, so that the positioning rod 47 is inserted into the second through groove 46, when it is inserted, the clamping frame 34 is loosened at this time, the third spring 44 rebounds to drive the clamping frame 34 to move, thereby driving the auxiliary block 51 to insert into the auxiliary groove 50 to assist in fixing the bone nail 45, when the positioning rod 47 is not used, the auxiliary block 51 and the auxiliary groove 50 can also ensure the fixing effect of the bone nail 45, the third electromagnet 36 is energized while the clamping plate 43 slides, so that the third electromagnet 36 adsorbs the second clamping block 38, so that the second clamping block 38 is separated from the second clamping groove 37, when the clamping plate 43 is reset, the clamping plate 43 drives the push rod 41 to move, thereby pressing the fixed rod 33 to move upward through the push rod 41, so that the fixed rod 33 is frictionally fixed with the groove wall of the ball groove 30 to fix the ball head 31, then the third electromagnet 36 is de-energized, so that the second spring 39 rebounds to drive the second clamping block 38 to move upward into the third clamping groove 40, thereby fixing the position of the clamping plate 43 and the push rod 41, thereby ensuring the stability of the device when clamping the bone nail 45, the first camera 8 can be used to monitor the distraction position, and then the display screen 6 is displayed, so that the distraction position can be monitored, preventing the limitation of the device from causing poor vision during distraction, thereby ensuring that the distraction position can be observed and judged, the first motor 9 is started, thereby driving the first screw 10 to rotate through the first motor 9, so that the first sliding block 11 can be pushed to move, thereby performing the distraction action, when the maximum range of distraction needs to be limited, the first electromagnet 21 can be energized at this time, so that the first electromagnet 21 adsorbs the limiting block 18, the limiting block 18 slides downward, and the first spring 20 is stretched, thereby limiting the sliding of the first sliding block 11 through the limiting block 18, thereby limiting the sliding distance of the first sliding block 11, when the distraction is completed, the second electromagnet 26 can be de-energized, so that the second electromagnet 26 no longer adsorbs and fixes the first clamping block 28,Thus, the second sliding rod 17 is slid upward, the first clamping block 28 is separated from the first clamping groove 27, and the connecting block 29 is disassembled, at this time, a telescopic rod with the same structure as the second sliding block 25 at both ends can be fixed with the connecting block 29, that is, the fixing frame 5 can be moved away on the basis of ensuring the position of the bone nail 45, thereby facilitating subsequent work, preventing the fixing frame 5 from limiting the surgical field, thereby ensuring the success rate of the operation, and at this time, the second camera 52 can be used for auxiliary monitoring.

[0036] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. A minimally invasive distraction instrument for reduction of a spinal fracture comprising a base (1), characterized in that, The base (1) is provided with a supporting structure and a moving structure, the supporting structure is provided with a fixing structure and a mounting structure, the mounting structure is provided with an auxiliary opening structure, the mounting structure is provided with an opening structure, the bottom of the opening structure is provided with a clamping structure, the opening structure and the clamping structure are provided with a connecting structure, the clamping structure comprises a connecting block (29), the lower side of the connecting block (29) is rotatably connected with a fine adjustment structure, one side of the fine adjustment structure is provided with a clamping plate (43), the clamping plate (43) and the fine adjustment structure are provided with a positioning structure, the clamping structure is provided with a bone nail (45), and the bone nail (45) corresponds to the positioning structure and the fine adjustment structure.

2. A minimally invasive distraction device for reduction of a spinal fracture as claimed in claim 1, wherein: The moving structure comprises a plurality of universal wheels (2) fixed to the lower side of the base (1), the supporting structure comprises a supporting rod (53) fixed to the base (1), the fixing structure comprises a clamping block (3) fixed to the supporting rod (53), the clamping block (3) is made of elastic material, the clamping block (3) is a C-shaped structure, the supporting rod (53) is an L-shaped structure, the supporting rod (53) is slidably connected with a connecting frame (4), the supporting rod (53) is threadedly connected with a fixing bolt, the connecting frame (4) is provided with a bolt groove corresponding to the fixing bolt, and the mounting structure comprises a fixing frame (5).

3. A minimally invasive distraction device for reduction of a spinal fracture as in claim 2, wherein: The auxiliary opening structure comprises a display screen (6) fixed to the side of the fixing frame (5) and a first camera (8) fixed to the lower side of the fixing frame (5), a plurality of light supplementing lamps (7) are fixed to the lower side of the fixing frame (5), the first camera (8) is connected with the display screen (6) through a data line, the opening structure comprises a first sliding block (11) slidably connected in the fixing frame (5), the first sliding block (11) is fixed with a first sliding rod (14), the first sliding rod (14) is slidably connected with a second sliding rod (17), and the end of the second sliding rod (17) is fixed with a mounting frame (22).

4. A minimally invasive distraction device for reduction of a spinal fracture as in claim 3, wherein: The fixing frame (5) is provided with a first sliding groove (15) corresponding to the first sliding block (11), the first sliding groove (15) is rotatably connected with a first screw rod (10), the first screw rod (10) is threadedly connected with the first sliding block (11), the end of the fixing frame (5) is fixed with a first motor (9), the output end of the first motor (9) is connected with the first screw rod (10), the fixing frame (5) is provided with a limiting structure corresponding to the first sliding block (11), the limiting structure comprises a plurality of limiting blocks (18), the fixing frame (5) is provided with a plurality of first grooves (19) corresponding to the limiting blocks (18), the first grooves (19) are fixed with first springs (20) between the groove walls and the limiting blocks (18), and the fixing frame (5) is fixed with a plurality of first electromagnets (21) corresponding to the limiting blocks (18).

5. A minimally invasive distraction device for reduction of vertebral fractures as claimed in claim 3 wherein: The first sliding rod (14) is internally provided with a second sliding groove (16) corresponding to a second sliding rod (17), the first sliding rod (14) is internally fixed with a second motor (12), the output end of the second motor (12) is fixed with a second screw rod (13), and the second screw rod (13) is in threaded cooperation with the second sliding rod (17).

6. A minimally invasive distraction device for reduction of vertebral fractures as claimed in claim 3, wherein: The mounting rack (22) is slidably fitted with a second sliding block (25), the mounting rack (22) is rotatably fitted with a third screw rod (24), the third screw rod (24) is in threaded cooperation with the second sliding block (25), one side of the mounting rack (22) is fixed with a third motor (23), the output end of the third motor (23) is fixedly connected with the third screw rod (24), and the second sliding block (25) corresponds to the connecting structure.

7. A minimally invasive distraction device for reduction of a spinal fracture as defined in claim 6, wherein: The connecting structure comprises a first clamping block (28) fixed on a connecting block (29), the second sliding block (25) is internally provided with a first clamping groove (27) corresponding to the first clamping block (28), the second sliding block (25) is internally fixed with a second electromagnet (26) corresponding to the first clamping block (28), and the fine adjustment structure comprises a clamping frame (34) rotatably connected with the connecting block (29).

8. A minimally invasive distraction device for reduction of a spinal fracture as defined in claim 7, wherein: The clamping frame (34) is fixedly provided with a ball head (31), the connecting block (29) is internally provided with a ball groove (30) corresponding to the ball head (31), the clamping frame (34) is internally provided with a third sliding groove (42) corresponding to a clamping plate (43), the ball head (31) is internally provided with a first through groove (32), the first through groove (32) is slidably fitted with a fixed rod (33), and one end of the fixed rod (33) close to the groove wall of the ball groove (30) is provided with a friction pattern.

9. A minimally invasive distraction device for reduction of a spinal fracture as defined in claim 8, wherein: The positioning structure comprises a push rod (41) slidably fitted in the third sliding groove (42), the push rod (41) is fixedly connected with the clamping plate (43), the clamping frame (34) is internally provided with a second recess (35), the second recess (35) is internally fixed with a third electromagnet (36), the second recess (35) is slidably fitted with a second clamping block (38), a plurality of second springs (39) are fixed between the second clamping block (38) and the groove wall of the second recess (35), the fixed rod (33) is internally provided with a second clamping groove (37), the push rod (41) is internally provided with a third clamping groove (40), and the second clamping groove (37) and the third clamping groove (40) are both in adsorptive fixation with the second clamping block (38).

10. A minimally invasive distraction instrument for reduction of a spinal fracture as defined in claim 8, wherein: The third sliding groove (42) is fixed with a third spring (44) between the clamping plate (43), a plurality of auxiliary blocks (51) are fixed on the clamping plate (43) and the clamping frame (34), a plurality of auxiliary grooves (50) are formed on the periphery of the bone nail (45), the auxiliary grooves (50) correspond to the auxiliary blocks (51), a second through groove (46) is formed in the bone nail (45), a positioning rod (47) is fixedly connected to one side of the clamping frame (34), the positioning rod (47) corresponds to the second through groove (46), a third clamping block (49) is fixed on the positioning rod (47), a fourth clamping groove (48) is formed in the clamping frame (34), the fourth clamping groove (48) corresponds to the third clamping block (49), a second camera (52) is fixed on the clamping frame (34), and the second camera (52) is connected with the display screen (6) through a data line.

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