Minimally invasive osteotomy device

Abstract

The invention relates to the technical field of surgical instruments, in particular to a minimally invasive osteotomy device which comprises a fret saw, a first traction assembly and a second traction assembly, the first traction assembly is arranged at the right end of the fret saw, and the second traction assembly with the same structure as the first traction assembly is arranged at the second end of the fret saw. The device is reasonable and compact in structure, a notch is formed in the part needing osteotomy, the middle of the fret saw is wound below the osteotomy part and makes contact with the position, needing osteotomy, of the bone surface, a clamping channel used for installing the fret saw is formed in the rotating body, and the rotating body can swing leftwards, rightwards, forwards and backwards relative to the rotating frame. In this way, according to osteotomy requirements, osteotomy operation can be achieved at a proper angle after the fretsaw is placed in the fretsaw, after the fretsaw is installed, the left hand and the right hand of a doctor grasp the first traction assembly and the second traction assembly respectively, the first traction assembly and the second traction assembly are pulled alternately at a proper position and at a proper angle, and then osteotomy operation is achieved. After the fretsaw rubs against the surface of the bone, the target position of the bone can be cut.

Description

Technical Field

[0001] The invention relates to the technical field of surgical instruments and relates to a minimally invasive osteotomy device. Background Art

[0002] In orthopedic surgery, more than 75% of the operations require osteotomy. The commonly used equipment is high-energy osteotomy equipment such as electric oscillating saws. The disadvantage is that a larger surgical incision is required, and overshoot often occurs, causing soft tissue damage. In order to avoid this situation, a baffle is usually used to protect the surrounding tissue. This operation requires further expansion of the surgical incision to achieve. Even if a baffle is used, it only protects the adjacent tissues and cannot protect the tissues on the osteotomy surface.

[0003] Wire saws are often used in low-energy osteotomies. The wire saw was first invented by Leonardo Gigli in 1894. The wire saw is composed of two serrated steel wires twisted together with a diameter of 0.65 mm. In the early days, the wire saw was used in obstetrics for episiotomy and was later favored by neurosurgery. No other instrument is gentler on the dura mater because the wire saw can be close to the inside of the skull and can form an oblique osteotomy by increasing the angle between the skull and the wire saw, reducing the occurrence of postoperative osteoporosis. Subsequently, the wire saw was widely used in thoracic surgery, orthopedics, and maxillofacial surgery. However, its inventor pointed out that the wire saw is still a simple and imprecise surgical tool.

[0004] In 2010, Falk pointed out that the heat generated by high-energy orthopedic tools can irreversibly damage or kill bone cells, a process called osteonecrosis. In 1989, Larson's literature recorded the temperature of the tibia and saw blade during knee replacement surgery. The highest temperature of the saw blade was 68°C, while the corresponding bone temperatures at 2 and 3 mm below the tibia cutting surface were 47°C and 42°C. It is generally believed that bones exposed to temperatures greater than 47°C for 60 seconds or even longer will be at risk of osteonecrosis.

[0005] Regarding the applicability of wire saws, in 2004, Levent performed two different tibial lengthening surgeries, and chose low-energy osteotomy (drilling osteotomy and wire saw osteotomy) for osteotomy. It was found that the healing index of the wire saw osteotomy group was higher. In 2002, Cengiz reported that inexperienced residents used wire saws to perform percutaneous osteotomy of the proximal tibia of cadavers and achieved good results (very few complications). In 2020, Nallamilli pointed out that the use of wire saws for ulnar olecranon osteotomy can not damage the joints, and "human" shaped osteotomies can be performed. In 2022, Keyu Kong believed that when the oscillating saw is not used well during hip replacement, a wire saw can be used as an alternative tool, and the efficacy is the same. In 2021, Robert reported that wire saws help infants to have a safe minimum access. In 2013, Zoccali reported that drilling and wire saws were used to complete large-scale resection of pelvic tumors.

[0006] Wire saw osteotomy is a commonly used osteotomy method in orthopedic surgery. It is mainly used for cutting deep bones. For example, in pelvic osteotomy, wire saws are often used to saw off the hip bone. Wire saws are wire saws with spirally distributed saw teeth, which are suitable for cutting deep bones. In orthopedic surgery, the biggest challenge facing wire saw osteotomy technology is how to pass the wire saw through the back of the ischium. Because the ischium is surrounded by the well-developed muscle tissue of the buttocks, the wire saw head will be buried deep between the muscle and bone tissue after passing through the back of the ischium, making it difficult to find the wire saw head during surgery. Therefore, it is more difficult to achieve wire saw osteotomy. Summary of the invention

[0007] The present invention provides a minimally invasive osteotomy device, which overcomes the deficiencies of the above-mentioned prior art and can effectively solve the problem that the existing osteotomy instruments cannot meet the requirements of different osteotomy angles.

[0008] The technical solution of the present invention is achieved through the following measures: a minimally invasive osteotomy device, including a wire saw, a first traction assembly and a second traction assembly. The first traction assembly is provided at the right end of the wire saw, and the second end of the wire saw is provided with a second traction assembly with the same structure as the first traction assembly. The first traction assembly includes a shell, a rotating body and a rotating frame fixedly installed in the shell. The rotating body is rotatably installed in the rotating frame, and a clamping channel for installing the wire saw is provided in the rotating body. The rotating body can swing left and right and front and back relative to the rotating frame, and the upper and lower sides of the shell are provided with through holes corresponding to the clamping channel.

[0009] The following are further optimizations and / or improvements to the above technical solutions: The above-mentioned rotating frame may include a front ear plate and a rear ear plate fixedly installed on the inner side of the lower part of the shell body at a front and rear interval, and the rotating body includes a front counterweight wheel, a rear counterweight wheel, a front bevel gear, a rear bevel gear, a left bevel gear and a right bevel gear. The front rotating shaft is rotatably installed on the upper part of the front ear plate, the front counterweight wheel is fixedly installed on the front end of the front rotating shaft, and the front bevel gear is fixedly installed on the rear outer side of the front rotating shaft. The rear rotating shaft corresponding to the front rotating shaft is rotatably installed on the upper part of the rear ear plate, the rear bevel gear is fixedly installed on the front outer side of the rear rotating shaft, and the rear counterweight wheel is fixedly installed on the rear end of the rear rotating shaft. The rear end of the front counterweight wheel is evenly spaced with a left front fixing plate and a right front fixing plate at a circumferential interval, and a left bevel gear is provided on the right side of the rear of the left front fixing plate, and the left bevel gear is meshed with the front bevel gear and the rear bevel gear, and a left connecting rod with a right end passing through the right end of the left bevel gear is screwed at the rear end of the left front fixing plate, and the right end of the left connecting rod corresponding to the right position of the left bevel gear is fixed on the outer side A right rear fixing plate is provided on the outer side of the right connecting rod corresponding to the position between the left side of the right front fixing plate and the right side of the right bevel gear, and the rear portion of the left rear fixing plate is rotatably mounted with the rear rotating shaft, and a right bevel gear is provided on the left side of the rear of the right front fixing plate, and the right bevel gear is meshed with the front bevel gear and the rear bevel gear.

[0010] A driven bevel gear can be mounted on the outer side of the rear rotating shaft at the position corresponding to the position between the rear bevel gear and the rear counterweight wheel. The rear sides of the left rear fixing plate and the right rear fixing plate are fixedly installed together at the corresponding positions of the front end of the driven bevel gear. A right bracket is detachably fixedly installed on the inner side of the right part of the shell. A right rotating shaft is rotatably installed on the upper part of the right bracket. A driving bevel gear is fixedly installed on the outer side of the right rotating shaft. The driving bevel gear and the driven bevel gear are meshed with each other. A reduction motor is fixedly installed on the inner side of the right part of the shell. The output shaft of the reduction motor is transmission-connected to the right end of the right rotating shaft.

[0011] A control module may be installed in the shell, an observation hole is provided on the front side of the shell and a display is fixedly installed in the observation hole. A temperature probe is provided in the wire saw and connected to the control module. The control module is respectively connected to the display and the reduction motor.

[0012] The above-mentioned first traction assembly may also include a guide assembly, the guide assembly includes a fixed rod, a rotating frame, a fixed shell, a first connecting shaft, a second connecting shaft and a guide rod. The fixed rod is fixedly installed on the front side of the lower part of the rear ear plate corresponding to the rear bevel gear below the rear bevel gear, and the rotating frame is rotatably installed on the outer side of the front of the fixed rod. The fixed shell is fixedly installed on the front side of the rotating frame. A circular mounting ring is provided in the fixed shell corresponding to the perforated position, and the first connecting shaft is fixedly installed on the left and right sides of the mounting ring. The end of the first connecting shaft and the fixed shell are rotatably installed together at the corresponding position, and a long strip swing groove opening inward is provided at the rear of the fixed shell, and a second connecting shaft with a rear end located in the swing groove is fixedly installed on the rear side of the mounting ring, and a hollow guide rod is fixedly installed on the lower end of the fixed shell, and the right end of the wire saw passes through the connecting ring, the clamping channel and the perforation in sequence from the lower end of the guide rod and is located above the shell.

[0013] A J-shaped guide head may be fixedly mounted on the lower end of the guide rod, and a guide channel for passing the wire saw is arranged inside the guide head.

[0014] The outer diameter of the guide head may gradually decrease from top to bottom.

[0015] The structure of the present invention is reasonable and compact. When performing an osteotomy, an incision is made at the part that needs osteotomy, and the middle part of the wire saw is wrapped around the bottom of the osteotomy to contact the position on the bone surface that needs to be cut. A clamping channel for installing the wire saw is provided in the rotating body, and the rotating body can swing left and right and front and back relative to the rotating frame, so that the wire saw can be placed in the wire saw to perform the osteotomy operation at a suitable angle according to the needs of osteotomy. After the wire saw is installed, the doctor's left and right hands respectively grasp the first traction component and the second traction component, and alternately pull the first traction component and the second traction component at a suitable position and angle, and the target position of the bone can be cut after the wire saw rubs against the bone surface.

[0016] During the process of alternately pulling the first traction component, the wrist can rotate forward and backward and left and right. On the one hand, the angle and contact area between the wire saw and the bone can be controlled to prevent the wire saw from damaging the tissue outside the bone. On the other hand, the angle between the shell and the wire saw can be changed. When the shell rotates, the position of the wire saw will not change under the action of the rotating body and the rotating frame. This can reduce wrist fatigue and shorten the operation time. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Attached Figure 1 This is a schematic diagram of the structure of the first embodiment of the present invention when in use.

[0018] Attached Figure 2 This is a schematic diagram of the main structure of the present invention when a wire saw is threaded.

[0019] Attached Figure 3 It is a schematic diagram of the front cross-sectional structure of the first traction assembly in the first embodiment of the present invention.

[0020] Attached Figure 4 It is a schematic diagram of the left side cross-sectional structure of the rotating body in the first embodiment of the present invention.

[0021] Attached Figure 5 It is a schematic diagram of the front cross-sectional structure of the rotating body in the second embodiment of the present invention.

[0022] Attached Figure 6 It is a schematic diagram of a top view and a cross-sectional structure of a rotating body in the second embodiment of the present invention.

[0023] Attached Figure 7 It is a left-side structural schematic diagram of the rotating body in the second embodiment of the present invention.

[0024] Attached Figure 8 It is a schematic diagram of the left side cross-sectional structure of the rotating body in the second embodiment of the present invention.

[0025] Attached Fig. 9 It is a right side structural schematic diagram of the rotating body in the second embodiment of the present invention.

[0026] Attached Fig.10 It is a schematic diagram of the right side cross-sectional structure of the rotating body in the second embodiment of the present invention.

[0027] Attached Fig.11 It is a schematic diagram of the front cross-sectional structure of the rear ear plate in the second embodiment of the present invention.

[0028] Attached Fig.12 It is a schematic diagram of the top view of the rotating frame in the second embodiment of the present invention.

[0029] Attached Fig.13 For attachment Figure 4 Schematic diagram of the enlarged structure at point A in the middle.

[0030] Attached Fig.14 Schematic diagram of the circuit structure of the fourth embodiment of the present invention.

[0031] The codes in the accompanying drawings are: 1 is a wire saw, 2 is a second traction assembly, 3 is a housing, 4 is a perforation, 5 is a front ear plate, 6 is a rear ear plate, 7 is a front counterweight wheel, 8 is a rear counterweight wheel, 9 is a front bevel gear, 10 is a rear bevel gear, 11 is a left bevel gear, 12 is a right bevel gear, 13 is a front rotating shaft, 14 is a rear rotating shaft, 15 is a left front fixed plate, 16 is a left connecting rod, 17 is a left clamping block, 18 is a left clamping groove, 19 is a right front fixed plate, 20 is the left rear fixed plate, 21 is the right rear fixed plate, 22 is the right connecting rod, 23 is the right clamping block, 24 is the right clamping groove, 25 is the right bracket, 26 is the driven bevel gear, 27 is the driving bevel gear, 28 is the right rotating shaft, 29 is the reduction motor, 30 is the fixed rod, 31 is the rotating frame, 32 is the fixed shell, 33 is the first connecting shaft, 34 is the second connecting shaft, 35 is the guide rod, 36 is the mounting ring, 37 is the swing groove, and 38 is the guide head. DETAILED DESCRIPTION

[0032] The present invention is not limited by the following embodiments, and specific implementation methods can be determined based on the technical solution of the present invention and actual conditions.

[0033] In the present invention, for the convenience of description, the relative position relationship of each component is described according to the attached Figure 1 The layout is described in detail, such as the positional relationship of front, back, top, bottom, left, right, etc., which is based on the attached manual. Figure 1 It is determined by the layout direction.

[0034] The present invention will be further described below in conjunction with embodiments and drawings: Embodiment 1: As shown in the attached Figure 1 , 2 As shown in Figures 3, 4 and 13, the minimally invasive osteotomy device includes a wire saw 1, a first traction assembly and a second traction assembly 2. The right end of the wire saw 1 is provided with the first traction assembly, and the second end of the wire saw 1 is provided with the second traction assembly 2 having the same structure as the first traction assembly. The first traction assembly includes a shell 3, a rotating body and a rotating frame 31 fixedly installed in the shell 3. The rotating body is rotatably installed in the rotating frame 31, and the rotating body is provided with a clamping channel for installing the wire saw 1. The rotating body can swing left and right and front and back relative to the rotating frame 31. The upper and lower sides of the shell 3 are provided with through holes 4 corresponding to the clamping channel.

[0035] According to the requirements, the wire saw 1 is an existing well-known technology, the shell 3 is used for convenient gripping when alternately pulling the first traction component and the second traction component 2, and the diameter of the perforation 4 is larger than the diameter of the wire saw 1. When performing an osteotomy, an incision is made at the part where osteotomy is required, and the middle part of the wire saw 1 is wrapped around the bottom of the osteotomy and in contact with the position on the bone surface where it is required to be cut. The rotating body is provided with a clamping channel for installing the wire saw 1, and the rotating body can swing left and right and front and back relative to the rotating frame 31, so that the wire saw 1 can be placed in the wire saw 1 according to the requirements of osteotomy and can perform osteotomy at a suitable angle. After the wire saw 1 is installed, the doctor's left and right hands grasp the first traction component and the second traction component 2 respectively, and alternately pull the first traction component and the second traction component 2 at a suitable position and angle. After the wire saw 1 rubs against the bone surface, the target position of the bone can be cut.

[0036] During the process of alternately pulling the first traction component, the wrist can rotate forward and backward and left and right. On the one hand, the angle and contact area between the wire saw 1 and the bone can be controlled to prevent the wire saw 1 from causing damage to the tissue outside the bone. On the other hand, the angle between the shell 3 and the wire saw 1 can be changed. When the shell 3 rotates, the position of the wire saw 1 will not change under the action of the rotating body and the rotating frame 31. This can reduce wrist fatigue and shorten the operation time.

[0037] The above-mentioned minimally invasive osteotomy device can be further optimized and / or improved according to actual needs: Embodiment 2: As an optimization of the above embodiment, as shown in the attached Figures 1 to 13 As shown, the rotating frame 31 includes a front ear plate 5 and a rear ear plate 6 fixedly installed on the inner side of the lower part of the shell 3 at a front and rear interval, and the rotating body includes a front counterweight wheel 7, a rear counterweight wheel 8, a front bevel gear 9, a rear bevel gear 10, a left bevel gear 11 and a right bevel gear 12. A front rotating shaft 13 is rotatably installed on the upper part of the front ear plate 5, and the front counterweight wheel 7 is fixedly installed on the front end of the front rotating shaft 13. The front bevel gear 9 is fixedly installed on the outer side of the rear of the front rotating shaft 13. A rear rotating shaft 14 corresponding to the front rotating shaft 13 is rotatably installed on the upper part of the rear ear plate 6. A rear bevel gear 10 is fixedly installed on the outer side of the front of the rear rotating shaft 14, a rear counterweight wheel 8 is fixedly installed on the rear end of the rear rotating shaft 14, a left front fixing plate 15 and a right front fixing plate 19 are evenly spaced along the circumference at the rear end of the front counterweight wheel 7, a left bevel gear 11 is provided on the right side of the rear of the left front fixing plate 15, the left bevel gear 11 is meshed with the front bevel gear 9 and the rear bevel gear 10, a left connecting rod 16 is screwed on the rear of the left front fixing plate 15, the right end of which passes through the right end of the left bevel gear 11, and the right end of the left connecting rod 16 corresponding to the right position of the left bevel gear 11 is fixed on the outer side A left clamping block 17 is installed, and a left clamping groove 18 is provided at the right end of the left clamping block 17, which passes through from top to bottom. A left rear fixing plate 20 is provided on the outside of the left connecting rod 16 corresponding to the position between the right side of the left front fixing plate 15 and the left side of the left bevel gear 11. The rear part of the left rear fixing plate 20 is rotatably installed together with the rear rotating shaft 14. A right bevel gear 12 is provided on the left side of the rear part of the right front fixing plate 19. The right bevel gear 12 is meshed with the front bevel gear 9 and the rear bevel gear 10. The rear end of the right front fixing plate 19 is screwed with a left end passing through the left end of the right bevel gear 12 A right connecting rod 22, a right clamping block 23 is fixedly installed on the outer side of the left end of the right connecting rod 22 corresponding to the left position of the right bevel gear 12, and a right clamping groove 24 is provided on the right end of the right clamping block 23, which runs through from top to bottom. When the left clamping groove 18 and the right clamping groove 24 are close to each other, a clamping channel for installing the wire saw 1 can be formed. A right rear fixing plate 21 is provided on the outer side of the right connecting rod 22 corresponding to the position between the left side of the right front fixing plate 19 and the right side of the right bevel gear 12, and the rear part of the right rear fixing plate 21 is rotatably installed together with the rear rotating shaft 14.

[0038] According to requirements, the left bevel gear 11 is meshed with the front bevel gear 9 and the rear bevel gear 10, that is, the front portion of the left bevel gear 11 is meshed with the left portion of the front bevel gear 9, and the rear portion of the left bevel gear 11 is meshed with the left portion of the rear bevel gear 10. The right bevel gear 12 is meshed with the front bevel gear 9 and the rear bevel gear 10, that is, the front portion of the right bevel gear 12 is meshed with the right portion of the front bevel gear 9, and the rear portion of the right bevel gear 12 is meshed with the right portion of the rear bevel gear 10. The left front fixing plate 15 and the right front fixing plate 19 can both be in the shape of an arc with an opening inward, or can be a vertically arranged plate-like structure. During use, the right end of the wire saw 1 passes through the lower side hole 4 of the shell 3, the clamping channel between the left clamping block 17 and the right clamping block 23, and the upper side hole 4 of the shell 3 from bottom to top, and then is located above the shell 3. By rotating the left connecting rod 16 and the right connecting rod 22, the left clamping block 17 and the right clamping block 23 are brought close to each other, and the left clamping groove 18 and the right clamping groove 24 form a clamping channel to clamp the outer side of the right part of the wire saw 1, thereby fixing the right end of the wire saw 1. Similarly, the second traction assembly 2 fixes the left end of the wire saw 1, and the front counterweight wheel 7 and the rear counterweight wheel 8 can increase the resistance of the front rotating shaft 13 and the rear rotating shaft 14.

[0039] When performing an osteotomy, an incision is made at the part that needs to be cut, and the middle part of the wire saw 1 is wrapped around the bottom of the osteotomy to make contact with the position on the bone surface that needs to be cut. Then the doctor's left and right hands respectively grasp the first traction component and the second traction component 2, and alternately pull the first traction component and the second traction component 2. After the wire saw 1 rubs against the bone surface, the target position of the bone can be cut.

[0040] During the process of alternately pulling the first traction component, the wrist can rotate forward and backward and left and right. On the one hand, the angle and contact area between the wire saw 1 and the bone can be controlled to prevent the wire saw 1 from causing damage to the tissue outside the bone. On the other hand, the angle between the shell 3 and the wire saw 1 can be changed. During the rotation of the shell 3, the position of the wire saw 1 will not change under the action of the rotating body and the rotating frame 31.

[0041] When the doctor's wrist swings to the left, the upper part of the shell 3 rotates to the left, and the shell 3 drives the front ear plate 5 and the rear ear plate 6 to rotate around the front rotating shaft 13 and the rear rotating shaft 14 respectively. Under the action of the front counterweight wheel 7 and the rear counterweight wheel 8, the front bevel gear 9 and the rear bevel gear 10 will not rotate, so the positions of the left bevel gear 11 and the right bevel gear 12 do not change, and the position of the wire saw 1 does not change. Similarly, when the doctor's wrist swings to the right, the upper part of the shell 3 rotates to the right, and the position of the wire saw 1 does not change.

[0042] When the doctor's wrist swings forward, the upper part of the shell 3 rotates forward, and the shell 3 drives the front bevel gear 9 and the rear bevel gear 10 to rotate through the front ear plate 5 and the rear ear plate 6 respectively. The rear part of the left front fixing plate 15 is screwed with a left connecting rod 16 whose right end passes through the right end of the left bevel gear 11, that is, the left connecting rod 16 can rotate relative to the left bevel gear 11, and the rear part of the right front fixing plate 19 is screwed with a right connecting rod 22 whose left end passes through the left end of the right bevel gear 12, that is, the right connecting rod 22 can rotate relative to the right bevel gear 12, and the left bevel gear 11 and the front bevel gear 11 are connected. The wheel 9 and the rear bevel gear 10 are meshed with each other, and the right bevel gear 12 is also meshed with the front bevel gear 9 and the rear bevel gear 10, so that the housing 3 can drive the front bevel gear 9 and the rear bevel gear 10 to rotate along the left bevel gear 11 and the right bevel gear 12 through the front ear plate 5 and the rear ear plate 6 respectively, while the left clamping block 17 and the right clamping block 23 remain in the same position and are still in a vertical state, so that the position of the wire saw 1 does not change. Similarly, when the doctor's wrist swings backward, the upper part of the housing 3 rotates backward, and the position of the wire saw 1 does not change.

[0043] During the osteotomy process, when the doctor's hands alternately pull the first traction assembly and the second traction assembly 2, the positions of the left clamping block 17 and the right clamping block 23 will not change, so that the positions of both ends of the wire saw 1 will not change. This can ensure that the osteotomy is cut according to the predetermined route, and can also avoid the doctor's hands from always operating in the same posture. Fatigue is easily generated, and the doctor's hands can be allowed to have a small wrist swing during the osteotomy operation to reduce fatigue.

[0044] Embodiment 3: As an optimization of the above embodiment, as shown in the attached Figures 3 to 13 As shown, a driven bevel gear 26 is sleeved on the outer side of the rear rotating shaft 14 corresponding to the position between the rear bevel gear 10 and the rear counterweight wheel 8, and the rear sides of the left rear fixed plate 20 and the right rear fixed plate 21 are fixedly installed together at the corresponding positions of the front end of the driven bevel gear 26. A right bracket 25 is detachably fixedly installed on the inner side of the right part of the shell 3, and a right rotating shaft 28 is rotatably installed on the upper part of the right bracket 25. A driving bevel gear 27 is fixedly installed on the outer side of the right rotating shaft 28, and the driving bevel gear 27 and the driven bevel gear 26 are meshed with each other. A reduction motor 29 is fixedly installed on the inner side of the right part of the shell 3, and the output shaft of the reduction motor 29 is drivingly connected with the right end of the right rotating shaft 28.

[0045] According to the requirements, the front end of the driven bevel gear 26 is fixedly installed with a fixing ring sleeved on the outside of the rear bevel gear 10, and the rear side of the left rear fixing plate 20 and the rear side of the right rear fixing plate 21 are fixedly installed together with the corresponding positions of the front end of the fixing ring. The reduction motor 29 is an existing well-known technology, such as a worm gear DC reduction motor 29. The output shaft of the reduction motor 29 and the right end of the right rotating shaft 28 can be connected together through an existing well-known coupling transmission. The output shaft of the reduction motor 29 and the right end of the right rotating shaft 28 can also be fixedly installed together. The right bracket 25 is an L-shaped plate, and the lower part of the right bracket 25 is fixedly installed together with the inner side of the lower part of the shell 3. During use, by setting the reduction motor 29, the rotation angles of the left bevel gear 11 and the right bevel gear 12 can be adjusted during osteotomy surgery, and the shell 3 can be flexibly rotated at multiple angles according to the swing of the doctor's wrist.

[0046] Embodiment 4: As an optimization of the above embodiment, as shown in the attached Fig.14 As shown, a control module is installed in the shell 3, and an observation hole that runs through the front and back is provided on the front side of the shell 3. A display is fixedly installed in the observation hole. A temperature measuring probe is provided in the wire saw 1, and the temperature measuring probe is connected to the control module. The control module is respectively connected to the display and the reduction motor.

[0047] According to the requirements, the control module is an existing well-known technology, such as STM32F103C8T6 single-chip computer, the display is an existing well-known technology, such as LCD1602 display screen, the temperature probe is an existing well-known technology, such as DS18B20 temperature sensor, and the wire saw 1 is provided with a temperature probe. When assembling the wire saw 1, the temperature probe can be wrapped around the inside of the wire saw 1. The shell 3 can also be provided with an existing well-known buzzer. When the temperature is greater than or equal to 47 degrees, the buzzer emits an audible and visual alarm. During use, by setting the temperature probe, the temperature between the wire saw 1 and the bone during the osteotomy operation can be collected in real time to avoid the phenomenon of bone necrosis after the temperature exceeds 47 degrees. In this way, the osteotomy force can be adjusted according to the displayed temperature, providing a stable force and angle during the osteotomy operation, and reducing the jamming phenomenon of the wire saw 1 during osteotomy.

[0048] Embodiment 5: As an optimization of the above embodiment, as shown in the attached Figure 3 , 4, 5, 7, 8, 10 to 13, the first traction assembly also includes a guide assembly, the guide assembly includes a fixed rod 30, a rotating frame 31, a fixed shell 32, a first connecting shaft 33, a second connecting shaft 34 and a guide rod 35, the fixed rod 30 is fixedly installed on the front side of the lower part of the rear ear plate 6 corresponding to the rear bevel gear 10, the rotating frame 31 is rotatably installed on the outer front part of the fixed rod 30, the fixed shell 32 is fixedly installed on the front side of the rotating frame 31, and a circular mounting ring 33 is provided in the fixed shell 32 corresponding to the position of the through hole 4. 6. The first connecting shaft 33 is fixedly installed on the left and right sides of the mounting ring 36. The ends of the first connecting shaft 33 are rotatably installed with the corresponding positions of the fixed shell 32. The rear part of the fixed shell 32 is provided with a long swing groove 37 with an opening facing inward. The rear side of the mounting ring 36 is fixedly installed with a second connecting shaft 34 with a rear end located in the swing groove 37. The lower end of the fixed shell 32 is fixedly installed with a hollow guide rod 35. The right end of the wire saw 1 passes through the connecting ring, the clamping channel and the through hole 4 in sequence from the lower end of the guide rod 35 and is located above the shell 3.

[0049] According to the requirements, the fixed rod 30 is a T-rod structure with a thick front and a thin rear. A rotating frame 31 is rotatably installed on the outer side of the front of the fixed rod 30, and the rear part of the rotating frame 31 is mounted on the outer side of the front end of the fixed rod 30. A pressure cover in contact with the step surface of the fixed rod 30 is fixedly installed on the rear side of the rotating frame 31. In this way, relative rotation between the rotating frame 31 and the fixed rod 30 can be achieved. The fixed shell 32 is spherical, and the rear part of the fixed shell 32 is provided with a rear axle hole for passing the first connecting shaft 33. The left and right parts of the fixed shell 32 are provided with a left axle hole and a right axle hole for mounting the second connecting shaft 34. The right end of the wire saw 1 passes through the outer side of the lower part of the fixed shell 32, the connecting ring, the outer side of the upper part of the fixed shell 32, the clamping channel between the left clamping block 17 and the right clamping block 23, and the through hole 4 on the upper side of the shell 3 from the lower end of the guide rod 35 in sequence, and then is located above the shell 3.

[0050] During use, such a configuration facilitates assembly and disassembly of the first traction assembly and the second traction assembly 2, and can be used repeatedly to reduce the cost of use. It can also make the assembly and disassembly, cleaning and disinfection of the osteotomy device after surgery more convenient.

[0051] When in use, first make a 1 to 2 cm incision in the skin at both ends of the planned osteotomy site, bluntly separate the subcutaneous tissue, then insert the lower end of the left guide rod 35 with the wire saw 1 through the skin incision on the left and penetrate into the lower surface of the bone, then insert the lower end of the right guide rod 35 without the wire saw 1 through the skin incision on the right and insert it into the lower surface of the bone close to the left guide rod 35, then rotate the right guide rod 35, wrap the end of the wire saw 1 around the lower end of the guide rod 35 and pull it out, so that the middle part of the wire saw 1 can be passed around the bone surface that needs osteotomy, and then the right end of the wire saw 1 is passed through the guide rod 35 and the clamping channel and is located above the shell 3, and the right part of the wire saw 1 is fixed in the right fixing groove, and the left part of the wire saw 1 is fixed in the second traction assembly 2 in the same way, so that the wire saw 1 can be wrapped around the bone surface to be osteotomized using two small incisions, thereby reducing the patient's pain and facilitating postoperative recovery.

[0052] Then, the shell 3 and the shell of the second traction component 2 are pulled back and forth to make the wire saw 1 rub back and forth on the bone surface, thereby performing the osteotomy operation. Only the wire saw 1 at the probe position contacts the human tissue to complete the osteotomy. During the osteotomy, as the wire saw 1 continues to cut bone, the probe will passively (as the wire saw 1 is pulled) slide along the bone surface until the osteotomy is completed. The probe will dynamically feedback the temperature to the control module. During the osteotomy operation, the doctor needs to check the current temperature of the wire saw 1 in contact with the bone part. When the display temperature is ≥47°C, the doctor stops the osteotomy operation, or when the display temperature is ≥47°C, the control module makes the buzzer sound an alarm. After hearing the alarm sound, the doctor stops the osteotomy operation and continues the osteotomy after the temperature drops to the set temperature value until the osteotomy is completed. After the osteotomy is completed, the right end of the wire saw 1 is first loosened to separate the first traction component from the right end of the wire saw 1, and then the wire saw 1 is pulled out through the second traction component 2.

[0053] When both ends of the wire saw 1 are vertically upward, if the doctor's wrist swings to the left, the upper part of the shell 3 rotates to the left, and the shell 3 drives the front ear plate 5 and the rear ear plate 6 to rotate around the front rotating shaft 13 and the rear rotating shaft 14 respectively. Under the action of the front counterweight wheel 7 and the rear counterweight wheel 8, the front bevel gear 9 and the rear bevel gear 10 will not rotate, so the positions of the left bevel gear 11 and the right bevel gear 12 do not change. At the same time, the rear ear plate 6 drives the rotating rod to rotate, and the rotating rod rotates relative to the rotating frame 31. The rotating frame 31 remains in position under the action of the gravity of the fixed shell 32, so that the position of the wire saw 1 does not change. Similarly, when the doctor's wrist swings to the right, the upper part of the shell 3 rotates to the right, and the position of the wire saw 1 does not change.

[0054] If the doctor's wrist swings forward, the upper part of the shell 3 rotates forward, and the shell 3 drives the front bevel gear 9 and the rear bevel gear 10 to rotate through the front ear plate 5 and the rear ear plate 6 respectively. The rear part of the left front fixing plate 15 is screwed with a left connecting rod 16 whose right end passes through the right end of the left bevel gear 11, that is, the left connecting rod 16 can rotate relative to the left bevel gear 11, and the rear part of the right front fixing plate 19 is screwed with a right connecting rod 22 whose left end passes through the left end of the right bevel gear 12, that is, the right connecting rod 22 can rotate relative to the right bevel gear 12, and the left bevel gear 11 is meshed with the front bevel gear 9 and the rear bevel gear 10, and the right bevel gear 12 is also meshed with the front bevel gear 9 and the rear bevel gear 10, so that the shell 3 can rotate relative to the left bevel gear 11 through the front ear plate 5 and the rear ear plate 6 respectively drive the front bevel gear 9 and the rear bevel gear 10 to rotate along the left bevel gear 11 and the right bevel gear 12, while the left clamping block 17 and the right clamping block 23 remain in the same position and are still in the vertical state, so that the position of the wire saw 1 does not change, and at the same time the rear ear plate 6 drives the rotating rod and the rotating frame 31 to rotate, the rotating frame 31 drives the fixed shell 32 to rotate relative to the first connecting shaft 33, the second connecting shaft 34 swings in the swing groove 37, the first connecting shaft 33 is stationary so that the position of the connecting ring remains unchanged, thereby making the position of the wire saw 1 unchanged, similarly when the doctor's wrist swings backward, the upper part of the shell 3 rotates backward, and the position of the wire saw 1 does not change.

[0055] When both ends of the wire saw 1 are in an inclined position, the reduction motor 29 can be controlled by a controller to drive the right rotating shaft 28 to rotate, thereby driving the driven bevel gear 26 to rotate through the active bevel gear 27. When the driven bevel gear 26 rotates, the left bevel gear 11 and the right bevel gear 12 are driven to rotate through the left rear fixing plate 20, the right rear fixing plate 21, the left front fixing plate 15 and the right rear fixing plate 21, so that the right part of the wire saw 1 extends to the upper left or upper right, and then the housing 3 is rotated forward and backward to extend the right part of the wire saw 1 to the upper front or upper rear. The guide rod 35 can be turned in four directions, so as to meet the requirements of osteotomy at multiple angles.

[0056] During the osteotomy process, when the doctor's hands pull the first traction assembly and the second traction assembly 2 alternately, the positions of the left clamping block 17 and the right clamping block 23 will not change, so that the positions of both ends of the wire saw 1 will not change. This can ensure that the osteotomy is cut according to the predetermined route, and can also avoid the doctor's hands from always operating in the same posture. Fatigue is easily generated, and the doctor's hands can be allowed to have a small swing of the wrist during the osteotomy operation to reduce fatigue.

[0057] Embodiment 6: As an optimization of the above embodiment, as shown in the attached Figure 1 , 2 As shown in FIG. 3 , a J-shaped guide head 38 is fixedly mounted on the lower end of the guide rod 35 , and a guide channel for passing the wire saw 1 is provided in the guide head 38 .

[0058] During use, by setting a guide channel and a J-shaped guide head 38, the guide rod 35 is convenient for the doctor to arrange the wire saw 1 on the path to be osteotomy, helping the doctor to accurately cut the bone, reducing the damage to the surrounding tissue of the bone when inserting the wire saw 1, and reducing the risk of surgery. The J-shaped guide head 38 can also meet different types of osteotomy surgeries. By adjusting the angle and position of the guide head 38, the wire saw 1 can be passed through irregular parts of the bone, which is convenient for the doctor to operate in a small space, improves the efficiency of the operation, and reduces the risks of postoperative infection, bleeding, etc. through precise guidance and protection.

[0059] Embodiment 7: As an optimization of the above embodiment, as shown in the attached Figure 1 , 2 As shown in Figures 3 and 4, the outer diameter of the guide head 38 gradually decreases from top to bottom.

[0060] During use, the outer diameter of the guide head 38 gradually decreases from top to bottom, so that the guide head 38 facilitates the wire saw 1 to pass quickly from behind the bone in a smaller incision, thereby reducing the difficulty of operating the bone cutting method using the wire saw 1.

[0061] When in use, first make a 1 to 2 cm incision in the skin at both ends of the planned osteotomy site, bluntly separate the subcutaneous tissue, then insert the guide head 38 of the guide rod 35 with the wire saw 1 on the left side into the skin incision in the front and then penetrate into the lower surface of the bone, then insert the guide head 38 of the guide rod 35 on the rear side without the wire saw 1 from the skin incision in the rear side into the lower surface of the bone and close to the guide head 38 on the front side, then rotate the rear guide rod 35, wrap the end of the wire saw 1 around the guide head 38 and then pull it out, so that the middle part of the wire saw 1 can be passed around the bone surface that needs osteotomy, and then the right end of the wire saw 1 is passed through the guide rod 35 and the right fixing groove and is located above the shell 3, and the right part of the wire saw 1 is fixed in the right fixing groove, and the left part of the wire saw 1 is fixed in the left fixing groove, so that the wire saw 1 can be wrapped around the bone surface to be osteotomized using two small incisions, especially when dealing with deep bone, the doctor can guide the wire saw more accurately, thereby reducing surgical risks and complications, and facilitating postoperative recovery.

[0062] The above technical features respectively constitute various embodiments of the present invention, which have strong adaptability and implementation effect. Non-essential technical features can be added or reduced according to actual needs to meet the requirements of different situations.

Claims

1. A minimally invasive osteotomy device, characterized in that It includes a wire saw, a first traction assembly and a second traction assembly. The first traction assembly is provided at the right end of the wire saw, and the second end of the wire saw is provided with a second traction assembly with the same structure as the first traction assembly. The first traction assembly includes a shell, a rotating body and a rotating frame fixedly installed in the shell. The rotating body is rotatably installed in the rotating frame, and a clamping channel for installing the wire saw is provided in the rotating body. The rotating body can swing left and right and front and back relative to the rotating frame, and the upper and lower sides of the shell are provided with through holes corresponding to the clamping channel.

2. The minimally invasive osteotomy device according to claim 1, characterized in that The rotating frame includes a front ear plate and a rear ear plate fixedly installed on the inner side of the lower part of the shell body at intervals front and back, and the rotating body includes a front counterweight wheel, a rear counterweight wheel, a front bevel gear, a rear bevel gear, a left bevel gear and a right bevel gear. The front rotating shaft is rotatably installed on the upper part of the front ear plate, the front counterweight wheel is fixedly installed on the front end of the front rotating shaft, and the front bevel gear is fixedly installed on the rear outer side of the front rotating shaft. The rear rotating shaft corresponding to the front rotating shaft is rotatably installed on the upper part of the rear ear plate, the rear bevel gear is fixedly installed on the front outer side of the rear rotating shaft, and the rear counterweight wheel is fixedly installed on the rear end of the rear rotating shaft. The rear end of the front counterweight wheel is evenly spaced with a left front fixing plate and a right front fixing plate at intervals along the circumference, and a left bevel gear is provided on the right side of the rear of the left front fixing plate, and the left bevel gear is meshed with the front bevel gear and the rear bevel gear, and a left connecting rod with its right end passing through the right end of the left bevel gear is screwed on the rear end of the left front fixing plate, and the right end of the left connecting rod corresponding to the right position of the left bevel gear is fixedly installed on the outer side A left clamping block is installed, the right end of the left clamping block is provided with a left clamping slot that passes through up and down, and a left rear fixing plate is provided on the outer side of the left connecting rod corresponding to the position between the right side of the left front fixing plate and the left side of the left bevel gear, and the rear portion of the left rear fixing plate is rotatably mounted together with the rear rotating shaft, and a right bevel gear is provided on the left side of the rear of the right front fixing plate, and the right bevel gear is meshed with the front bevel gear and the rear bevel gear. The rear of the right front fixing plate is screwed with a right connecting rod with the left end passing through the left end of the right bevel gear, and the right clamping block is fixedly installed on the outer side of the left end of the right connecting rod corresponding to the left position of the right bevel gear, and the right end of the right clamping block is provided with a right clamping slot that passes through up and down, and the left clamping slot and the right clamping slot are close to each other, which can form a clamping channel for installing the wire saw, and a right rear fixing plate is provided on the outer side of the right connecting rod corresponding to the position between the left side of the right front fixing plate and the right side of the right bevel gear, and the rear portion of the right rear fixing plate is rotatably mounted together with the rear rotating shaft.

3. The minimally invasive osteotomy device according to claim 2, characterized in that A driven bevel gear is mounted on the outer side of the rear rotating shaft corresponding to the position between the rear bevel gear and the rear counterweight wheel. The rear sides of the left rear fixing plate and the right rear fixing plate are fixedly installed together at the corresponding positions of the front end of the driven bevel gear. A right bracket is detachably fixedly installed on the inner side of the right part of the shell. A right rotating shaft is rotatably installed on the upper part of the right bracket. A driving bevel gear is fixedly installed on the outer side of the right rotating shaft. The driving bevel gear and the driven bevel gear are meshed with each other. A reduction motor is fixedly installed on the inner side of the right part of the shell. The output shaft of the reduction motor is transmission-connected to the right end of the right rotating shaft.

4. The minimally invasive osteotomy device according to claim 3, characterized in that A control module is installed in the shell, an observation hole is provided on the front side of the shell and a display is fixedly installed in the observation hole, a temperature probe is provided in the wire saw and the temperature probe is connected to the control module, and the control module is respectively connected to the display and the reduction motor.

5. The minimally invasive osteotomy device according to claim 2, 3 or 4, characterized in that The first traction assembly also includes a guide assembly, the guide assembly includes a fixed rod, a rotating frame, a fixed shell, a first connecting shaft, a second connecting shaft and a guide rod, a fixed rod is fixedly installed on the front side of the lower part of the rear ear plate corresponding to the rear bevel gear below the rear bevel gear, a rotating frame is rotatably installed on the outer front part of the fixed rod, a fixed shell is fixedly installed on the front side of the rotating frame, a circular mounting ring is provided in the fixed shell corresponding to the perforated position, the first connecting shaft is fixedly installed on the left and right sides of the mounting ring, the end of the first connecting shaft and the fixed shell are rotatably installed together at the corresponding position, a long strip swing groove with an opening facing inward is provided at the rear of the fixed shell, a second connecting shaft with a rear end located in the swing groove is fixedly installed on the rear side of the mounting ring, a hollow guide rod is fixedly installed on the lower end of the fixed shell, and the right end of the wire saw passes through the connecting ring, the clamping channel and the perforation in sequence from the lower end of the guide rod and is located above the shell.

6. The minimally invasive osteotomy device according to claim 5, characterized in that A J-shaped guide head is fixedly installed at the lower end of the guide rod, and a guide channel for passing the wire saw is arranged in the guide head.

7. The minimally invasive osteotomy device according to claim 6, characterized in that The outer diameter of the guide head gradually decreases from top to bottom.

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