Fracture traction device
By designing a fracture traction device including a proximal support unit, a fixing screw, a distal support unit and a plurality of auxiliary reduction parts, the problems of unstable fracture reduction and unsatisfactory reduction in the prior art are solved, and high-precision and stable fracture reduction are achieved.
Patent Information
- Application Number
- CN202411986597.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-03-11
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
Existing fracture traction devices are difficult to maintain fracture reduction and lower limb length stably, which affects the treatment effect and the reduction effect is not ideal.
A fracture traction device is designed, including a proximal support unit, a fixing screw, a distal support unit and a plurality of auxiliary reduction parts. Through the arrangement of the proximal and distal support rings, the fixing needle part and the guide slide are combined to achieve axis reduction and traction at the fracture.
This device can ensure the axis reduction and traction force at the fracture site, improve the accuracy and stability of the reduction, and is suitable for different types of fractures, especially the reduction of the tibia and femur.
Smart Images
Figure CN119587132A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the field of medical instruments, and in particular to a fracture traction device. Background Art
[0002] In trauma orthopedics, bone traction utilizes the principle of action and reaction in mechanics to pull the affected limb through gravity, thereby relieving the tension and retraction of the soft tissue at the fracture and dislocation site, reducing the fracture or dislocation, and achieving the purpose of treatment. In particular, fractures of the calf and ankle are the sites with the highest incidence of fractures in the body, and are often complicated, with many types of fractures and difficult reduction. If not handled properly, they can easily cause complications such as shortening of the lower limb, malformation, and nonunion. In addition, with the change in the concept of fracture reduction, more and more emphasis is placed on the importance of closed minimally invasive fracture reduction. For more complex fractures of the calf and ankle, minimally invasive closed reduction has become an inevitable challenge in clinical work.
[0003] Intramedullary nail fixation or percutaneous minimally invasive implantation of bone plates are commonly used treatment methods for tibial fractures. In order to achieve stable reduction and reduce the possibility of fracture re-displacement, it is necessary to rely on intramedullary nails and traction devices to achieve temporary stabilization. During the operation, two assistants are required to hold the proximal and distal ends of the traction device respectively to operate. However, this method often cannot stably maintain fracture reduction and lower limb length, which affects the treatment effect and often has unsatisfactory reduction effects. Therefore, it is necessary to provide a fracture traction device that can perform fracture reduction and fracture section displacement. Summary of the invention
[0004] The present invention is intended to provide a fracture traction device, so as to provide a fracture traction device capable of performing fracture reduction and fracture section displacement.
[0005] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a fracture traction device, comprising a proximal support unit, a fixing screw, a distal support unit and a plurality of auxiliary reduction parts, the proximal support unit comprising two proximal support rings, the distal support unit comprising two distal support rings, the proximal support ring and the distal support ring are circumferentially evenly provided with a plurality of connecting holes, the proximal support ring and the distal support ring are both detachably provided with at least one fixing needle part, the fixing needle part comprises a fixing needle device and a bone screw whose end is fixed on the fixing needle device; the auxiliary reduction parts comprise a guide slide and a sliding rod, the guide slides are circumferentially arranged on the distal support ring close to the fracture point, one end of the sliding rod is fixed on the proximal support ring close to the fracture point, and the other end is inserted into the corresponding guide slide and the two can slide relative to each other.
[0006] The beneficial effects of this program are:
[0007] Through the above arrangement, when the bone of a person's leg is completely broken, due to the continuous tension between the soft tissues of the leg, the tension will cause dislocation and displacement of the bone fracture. Therefore, when performing traction surgery on the fracture, it is necessary to first reposition the fracture axis, and then traction is used to overcome the tension of the muscles to pull the broken bone to restore it in the length direction. If the fracture is not repositioned in the axial direction, the force axis of the fracture will be eccentric, the shear force will be increased at the fracture, and it will become the maximum force-bearing point when walking, which will cause long-term damage to the patient. In the present technical solution, fixators are provided on both the proximal support ring and the distal support ring. After a hole is opened on the tibia before traction reduction, one end of the bone needle is fixed on the tibia and the other end is fixed on the fixator to fix the bone needle and the traction device. The setting of the fixator and the needle fixing part can ensure that the tibia and the traction device do not fall off during the traction process. When traction reduction is performed, the proximal support unit and the distal support unit They are fixed respectively on both sides of the tibia at the fracture site, the proximal support unit includes two proximal support rings, and the distal support unit includes two distal support rings. Adjacent support rings and adjacent distal support rings are relatively fixed by fixing screws. Through the setting of the fixator and the bone needle, the proximal support unit and the distal support unit can be firmly fixed to the two ends of the broken leg bone, and the adjacent support rings and adjacent distal support rings are connected by fixing screws. If only one proximal support ring (or distal support ring) is set, since the support ring is supported by the bone needle, the plane where the single proximal support ring (or distal support ring) is located may be tilted or other unstable conditions during horizontal reduction, which will affect the accuracy and stability of traction reduction. Therefore, two proximal support rings and distal support rings are set and connected by fixing screws to form a three-dimensional stable structure, which ensures the stability of the traction process, ensures the uniform distribution of traction force during the traction process, and improves the accuracy of reduction.
[0008] The technical solution also has auxiliary reduction parts including a guide slide and a sliding rod. One end of the sliding rod is fixed on the proximal support ring near the fracture point, and the other end is inserted into the corresponding guide slide for limited sliding. When the proximal and distal axes of the tibia are reduced, the guide slide is adjusted to slide in the opposite direction under the support of the sliding rod to achieve axial reduction of the broken bone. The technical solution is provided with multiple auxiliary reduction parts so that the upper and lower forces of the traction device at the reduction point are uniform and stable. The technical solution can adapt to different types of fractures by adjusting the connection structure of the sliding rod and the proximal and distal support units, and is particularly suitable for the reduction of long bones such as tibia and femur.
[0009] Preferably, as an improvement, the auxiliary resetting part also includes a rotating base and an end mounting seat, the rotating base includes a base and a rotating disk arranged on the base, the base is detachably fixed on the connecting hole, arc-shaped sliding holes are symmetrically provided on both sides of the rotating disk, a guide sliding groove is opened in the guide sliding seat, a pushing block part that can slide against the end of the sliding rod is provided in the guide sliding groove, connecting screws are fixed at both ends of the bottom of the guide sliding seat, the two connecting screws respectively pass through the corresponding arc-shaped sliding holes, and the ends of the connecting screws are threadedly connected with fixing nuts.
[0010] The beneficial effect is as follows: through the above-mentioned arrangement, the sliding rod is pre-fixed vertically on the proximal support ring at the more distal end during use, and the rotating base is correspondingly installed on the distal support ring close to the proximal support ring. After determining the offset direction and offset distance of the broken bone according to the pre-taken fracture film, the guide slide is adjusted to rotate to the corresponding angle and the sliding rod is inserted into the guide slot. When in use, after the multiple auxiliary reduction parts are circumferentially installed, the displacement of the push block part is against the end of the sliding rod. Since the sliding rod is vertically arranged on the proximal support ring, the guide slot slides along the sliding rod along the previously set rotation direction during the continuous sliding of the push block part, which can effectively connect the two ends of the fracture, ensure that the broken end is accurately reduced in the predetermined direction, avoid reduction failure caused by incorrect angles, and realize driving the distal end of the fracture to move closer to the proximal end of the fracture until it is adjusted to the predetermined axis position. If the first adjustment If it is not in place, the guide slide can be rotated again to fine-tune the resetting direction, thereby shortening the operation time and improving the resetting effect; through the above-mentioned setting, the guide slide can rotate relative to the rotating disk, and the angle of the guide slide can be adjusted to achieve resetting at different angles, and the angle can be fine-tuned in real time to adapt to the changing surgical environment; by symmetrically providing arc-shaped sliding holes on both sides of the rotating disk, and connecting screws fixed at both ends of the bottom of the guide slide, the two connecting screws pass through the corresponding arc-shaped sliding holes respectively and are fixed with fixing nuts. On the one hand, two connecting screws are provided to firmly fix the two ends of the guide slide to prevent the guide slide angle from shifting during the pushing process of the push block; on the other hand, the two arc-shaped sliding holes can guide the rotation of the guide slide; at the same time, a plurality of auxiliary resetting parts are provided in the technical solution, which can be evenly stressed in the circumferential direction rather than just one sliding rod, thereby ensuring the stability of the resetting.
[0011] Preferably, as an improvement, the push block part includes a push block and a push block screw, a V-shaped groove is opened on one side of the push block, the V-shaped groove abuts against the sliding rod, a rotating hole is opened on the other side of the push block, and a clamping part is provided on the push block screw near the push block side, the clamping part is inserted into the rotating hole and clamped with the push block and can rotate relative to the rotating hole, the other end of the push block screw passes through the guide slide, and the push block screw is threadedly connected to the guide slide.
[0012] The beneficial effects are as follows: by setting the V-shaped groove and the sliding rod to resist each other, the sliding rod can be limited in the V-shaped groove for automatic centering and limiting during the sliding process of the push block, and the sliding rod can always remain in the groove to avoid the sliding rod deviating from the predetermined position due to external force, thereby ensuring that the fracture section is reset along the predetermined axis and reducing the possibility of reset deviation; the push block screw is threadedly connected to the guide slide seat, and the rotation of the push block screw can drive the push block to continuously resist the sliding rod, driving the guide slide seat threadedly connected to the push block screw to slide relative to the sliding rod for reset, and the rotation of the push block screw can drive the push block to stably push the sliding rod, thereby controlling the reset distance and time.
[0013] Preferably, as an improvement, a rotating block is fixed to the end of the push block screw away from the push block, the rotating block is in a cube shape, and the four surfaces of the rotating block rotating along the rotation direction of the push block screw are engraved with different marks.
[0014] The beneficial effects are: by setting the rotating block to be a cube shape, the cube-shaped rotating block can ensure that the tool can apply torque evenly and can find suitable contact points on each surface, ensuring that the tool can stably rotate the rotating block and is not easy to slip; the four surfaces of the rotating block that rotate along the rotation direction of the push block screw are engraved with different marks, which can be scales, numbers or symbols. As angle marks or rotation circle marks, it is convenient for medical staff to record the rotation angle, rotation circle and angle. The marks can provide medical staff with real-time operation information, helping them to track and record the pushing distance, angle changes, etc. of the push block. Through these marks, medical staff can accurately monitor the reduction angle and progress during the reduction process, ensure the accuracy of adjustments during the reduction process, and facilitate later records.
[0015] Preferably, as an improvement, the upper end surface of the sliding rod is provided with a thread, the end mounting seat is sleeved on the sliding rod and threadedly connected to the sliding rod, the end of the sliding rod is also threadedly connected to a connecting nut, and the proximal support ring is located between the end mounting seat and the connecting nut.
[0016] The beneficial effect is: through the above-mentioned arrangement, the end mounting seat is threadedly connected to the sliding rod in advance when installing the sliding rod. During installation, the upper end of the sliding rod is passed through the connecting hole on the near support ring and the connecting nut is tightened to fix it. After fixing, the upper surface of the end mounting seat and the lower surface of the near support ring are horizontally abutted against each other. On the one hand, the stability of the sliding rod installation is ensured, and the firmness of the fixing of the end of the sliding rod is ensured to provide stable support for the guide slide seat. On the other hand, the sliding rod is ensured to be vertically arranged on the near support ring to avoid skewed installation resulting in incorrect guidance.
[0017] Preferably, as an improvement, the outer surface of the end mounting seat is provided with a plurality of cut surfaces.
[0018] The beneficial effect is that a plurality of cut surfaces are arranged on the outer surface of the end mounting seat, providing a plurality of plane contact points, so that the tool can apply force more evenly when rotating, making it easier to use the tool to tighten the end mounting seat.
[0019] Preferably, as an improvement, the sliding rod includes a lower sliding rod and an upper sliding rod threadedly connected to the end mounting seat, and a shaft sleeve is fixed to the upper end of the lower sliding rod, and the shaft sleeve can be sleeved on the outer side of the lower end of the lower sliding rod and threadedly connected thereto.
[0020] The beneficial effect is: through the above-mentioned setting, the lower sliding rod can be driven to move relative to the upper sliding rod by rotating the shaft sleeve. After the lower sliding rod slides to abut against the guide slide seat, it continues to rotate, so that the overall length of the sliding rod is extended, thereby driving the distal support unit to slide in the direction away from the proximal support unit, overcoming the tension between the leg muscles and migrating the broken tibia back to the original position, avoiding the tibia being shorter than the other side after recovery due to the action of muscle tension. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention;
[0022] Figure 2 It is a structural schematic diagram and a cross-sectional view of the auxiliary resetting portion of Example 1 of the present invention;
[0023] Figure 3 It is a top view of the auxiliary resetting portion of Example 1 of the present invention;
[0024] Figure 4 It is a cross-sectional view of the auxiliary resetting portion of embodiment 2 of the present invention;
[0025] Figure 5 It is a cross-sectional view of the auxiliary resetting portion of embodiment 3 of the present invention. DETAILED DESCRIPTION
[0026] The following is further described in detail through specific implementation methods:
[0027] The figure marks in the drawings of the specification include: proximal support ring 1, distal support ring 2, connecting hole 3, needle fixer 4, bone screw 5, guide slide 6, sliding rod 7, base 8, rotating disk 9, arc-shaped sliding hole 10, guide slide groove 11, connecting screw 12, fixing nut 13, push block 14, V-shaped groove 15, rotating block 16, push block screw 17, end mounting seat 18, upper slide rod 19, lower slide rod 20, shaft sleeve 21, telescopic block 22, sliding cavity 23, cam 24, spring 25, sliding plate 26, hexagonal groove 27.
[0028] Example 1
[0029] Example 1 is basically as Figure 1-Figure 3 As shown, Figure 1 and Figure 2A fracture traction device is shown, comprising a proximal support unit, a fixing screw, a distal support unit and a plurality of auxiliary reduction parts. In the embodiment, the number of the auxiliary reduction parts is 3. The proximal support unit comprises two proximal support rings 1, and the distal support unit comprises two distal support rings 2. The proximal support ring 1 and the distal support ring 2 are circumferentially evenly provided with a plurality of connecting holes 3. Both the proximal support ring 1 and the distal support ring 2 are detachably provided with at least one fixing needle part. In the present embodiment, at least two fixing needle parts are fixedly provided on each proximal support ring 1 or the distal support ring 2. The fixing needle parts are fixed by bolts. The fixing needle parts comprise a fixing needle device 4 and a bone screw 5 whose end is fixed on the fixing needle device 4. The auxiliary reduction parts comprise a rotating base, an end mounting seat 18, a guide slide seat 6 and a sliding rod 7. The slide seats 6 are all circumferentially arranged on the far support ring 2 near the fracture point. The rotating base includes a base 8 and a rotating disk 9 arranged on the base 8. The base 8 is detachably fixed on the connecting hole 3. Arc-shaped sliding holes 10 are symmetrically arranged on both sides of the rotating disk 9. A guide slide groove 11 is opened in the guide slide seat 6. One end of the sliding rod 7 is fixed on the near support ring 1 near the fracture point, and the other end is inserted into the corresponding guide slide groove 11. The two can slide relative to each other. There is a gap between the lower surface of the sliding rod 7 and the guide slide groove 11. A pushing block portion that can slide against the end of the sliding rod 7 is provided in the guide slide groove 11. Connecting screws 12 are fixed at both ends of the bottom of the guide slide seat 6. The two connecting screws 12 respectively pass through the corresponding arc-shaped sliding holes 10, and the ends of the connecting screws 12 are threadedly connected with fixing nuts 13.
[0030] Through the above arrangement, when the bone of a person's leg is completely broken, due to the continuous tension between the soft tissues of the leg, the tension will cause dislocation and displacement of the bone fracture. Therefore, when performing traction surgery on the fracture, it is necessary to first reposition the fracture axis, and then traction is used to overcome the tension of the muscles to pull the broken bone to restore it in the length direction. If the fracture is not repositioned in the axial direction, the force axis of the fracture will be eccentric, the shear force will be increased at the fracture, and it will become the maximum force-bearing point when walking, which will cause long-term damage to the patient. In the present technical solution, fixators are provided on both the proximal support ring 1 and the distal support ring 2. After a hole is opened on the tibia before traction reduction, one end of the bone needle is fixed on the tibia and the other end is fixed on the fixator to fix the bone needle and the traction device. The setting of the fixator and the needle fixing part can ensure that the tibia and the traction device do not fall off during the traction process. When traction reduction is performed, the proximal support unit and the distal support unit are respectively fixed on On both sides of the tibia at the fracture site, the proximal support unit includes two proximal support rings 1, and the distal support unit includes two distal support rings 2. The adjacent support rings 1 and the adjacent distal support rings 2 are relatively fixed by fixing screws. Through the setting of the fixator and the bone needle, the proximal support unit and the distal support unit can be firmly fixed to the two ends of the broken leg bone. The adjacent support rings 1 and the adjacent distal support rings 2 are connected by fixing screws. If only one proximal support ring 1 (or distal support ring 2) is set, since the support ring is supported by the bone needle, the plane where the single proximal support ring 1 (or distal support ring 2) is located may be tilted or other unstable conditions during horizontal reduction, which will affect the accuracy and stability of traction reduction. Therefore, two proximal support rings 1 and the distal support ring 2 are set and connected by fixing screws to form a three-dimensional stable structure, which ensures the stability of the traction process, ensures the uniform distribution of traction force during the traction process, and improves the accuracy of reduction.
[0031] The present technical solution is also provided with an auxiliary reduction part, which includes a guide slide 6 and a sliding rod 7. One end of the sliding rod 7 is fixed on the proximal support ring 1 near the fracture point, and the other end is inserted into the corresponding guide slide 6 for limited sliding. When the proximal and distal axes of the tibia are reduced, the guide slide 6 is adjusted to slide in the opposite direction under the support of the sliding rod 7 to achieve axial reduction of the broken bone. When in use, the sliding rod 7 is vertically fixed to the proximal support ring 1 at the more distal end in advance, and the rotating base is correspondingly installed on the distal support ring 2 close to the proximal support ring 1. After determining the displacement direction and displacement distance of the fractured bone according to the pre-photographed fracture site film, adjust the guide slide 6 to rotate to the corresponding angle and insert the sliding rod 7 into the guide slot 11. When in use, after the multiple auxiliary reduction parts are installed circumferentially, the displacement of the push block part is against the end of the sliding rod 7. Since the sliding rod 7 is vertically arranged on the near support ring 1, the guide slot 11 slides along the sliding rod 7 along the previously set rotation direction during the continuous sliding of the push block part, which can effectively connect the two ends of the fracture and ensure that the fracture end is accurately reduced in the predetermined direction. Avoid the failure of reduction caused by incorrect angle, realize driving the distal end of the fracture to move closer to the proximal end of the fracture until it is adjusted to the predetermined axis position, if the first adjustment is not in place, the fine-tuning guide slide 6 can be rotated again to adjust the reduction direction, shorten the operation time and improve the reduction effect; through the above-mentioned setting, the guide slide 6 can rotate relative to the rotating disk 9, and the angle of the guide slide 6 can be adjusted to achieve reduction at different angles, and the angle can also be fine-tuned in real time to adapt to the changing surgical environment; by symmetrically providing arc-shaped sliding holes 10 on both sides of the rotating disk 9, and connecting screws 12 fixed at both ends of the bottom of the guide slide 6, the two connecting screws 12 pass through the corresponding arc-shaped sliding holes 10 and are fixed with fixing nuts 13, on the one hand, two connecting screws 12 are provided to firmly fix the two ends of the guide slide 6 to prevent the angle of the guide slide 6 from shifting during the pushing process of the push block 14; on the other hand, the two arc-shaped sliding holes 10 can guide the rotation of the guide slide 6; at the same time, a plurality of auxiliary reduction parts are provided in the technical solution, which can be evenly stressed in the circumferential direction instead of just one sliding rod 7, to ensure the stability of reduction.
[0032] like Figure 3As shown, the push block portion includes a push block 14 and a push block screw 17. A V-shaped groove 15 is opened on one side of the push block 14, and the V-shaped groove 15 is against the sliding rod 7. A rotating hole is opened on the other side of the push block 14. A clamping part is provided on the push block screw 17 near the push block 14. The clamping part is inserted into the rotating hole and clamped with the push block 14 and can rotate relative to the rotating hole. The other end of the push block screw 17 passes through the guide slide 6, and the push block screw 17 is threadedly connected to the guide slide 6. During the sliding process of the push block 14, the sliding rod 7 can be limited in the V-shaped groove 15 for automatic centering and limiting. The sliding rod 7 can always remain in the groove to prevent the sliding rod 7 from deviating from the predetermined position due to external force, thereby ensuring that the fracture section is reset along the predetermined axis and reducing the possibility of reset deviation; the push block screw 17 is threadedly connected to the guide slide 6, and the rotation of the push block screw 17 can drive the push block 14 to continuously resist the sliding rod 7, driving the guide slide 6 threadedly connected to the push block screw 17 to slide relative to the sliding rod 7 for reset, and the rotation of the push block screw 17 can drive the push block 14 to stably push the sliding rod 7, thereby controlling the reset distance and time. A rotating block 16 is fixed to the end of the push block screw 17 away from the push block 14. The rotating block 16 is in the shape of a cube. The four surfaces of the rotating block 16 rotating along the rotation direction of the push block screw 17 are engraved with different marks. By setting the rotating block 16 to be in the shape of a cube, the cube-shaped rotating block 16 can ensure that the tool can apply torque evenly and can find suitable contact points on each surface, ensuring that the tool can stably rotate the rotating block 16 without slipping easily; the four surfaces of the rotating block 16 rotating along the rotation direction of the push block screw 17 are engraved with different marks. These marks can be scales, numbers or symbols. As angle marks or rotation circle marks, medical staff can record the rotation angle, rotation circle and angle conveniently. The marks can provide real-time operation information for medical staff, helping them to track and record the pushing distance, angle change, etc. of the push block 14. Through these marks, medical staff can accurately monitor the reduction angle and progress during the reduction process, ensure the accuracy of adjustment during the reduction process, and facilitate later recording.
[0033] The upper end surface of the sliding rod 7 in this embodiment is provided with a thread, and the end mounting seat 18 is sleeved on the sliding rod 7 and threadedly connected to the sliding rod 7. The end of the sliding rod 7 is also threadedly connected with a connecting nut, and the near support ring 1 is located between the end mounting seat 18 and the connecting nut. Through the above arrangement, when installing the sliding rod 7, the end mounting seat 18 is threadedly connected to the sliding rod 7 in advance. When installing, the upper end of the sliding rod 7 is passed through the connecting hole 3 on the near support ring 1 and the connecting nut is tightened and fixed. After fixing, the upper surface of the end mounting seat 18 and the lower surface of the near support ring 1 are horizontally abutted. On the one hand, it can ensure the stability of the installation of the sliding rod 7 and the firmness of the end of the sliding rod 7, so as to provide stable support for the guide slide 6. On the other hand, it can ensure that the sliding rod 7 is vertically arranged on the near support ring 1 to avoid the installation being skewed and unable to guide; the outer surface of the other end mounting seat 18 is provided with a plurality of cut surfaces, and a plurality of cut surfaces are arranged on the outer surface of the end mounting seat 18 to provide a plurality of plane contact points, so that the tool can apply force more evenly when rotating, which is convenient for using the tool to tighten the end mounting seat 18.
[0034] Example 2
[0035] Example 2 Figure 4 As shown, the difference between Example 2 and Example 1 is that the sliding rod 7 includes a lower sliding rod 20 and an upper sliding rod 19 threadedly fixed to the end mounting seat 18, and a shaft sleeve 21 is fixed to the upper end of the lower sliding rod 20, and the shaft sleeve 21 can be sleeved on the outer side of the lower end of the lower sliding rod 20 and threadedly connected thereto; by rotating the shaft sleeve 21, the lower sliding rod 20 can be driven to move relative to the upper sliding rod 19, and the lower sliding rod 20 continues to rotate after sliding to abut against the guide slide 6, so that the overall length of the sliding rod 7 is extended, thereby driving the distal support unit to slide in the direction away from the proximal support unit, overcoming the tension between the leg muscles to migrate the broken tibia back to the original position, and avoiding the tibia being shorter than the other side tibia after recovery due to the action of muscle tension.
[0036] Example 3
[0037] Example 3 Figure 5As shown, the difference between Example 3 and Example 1 is that the sliding rod 7 includes a sliding rod 20 and an upper sliding rod 19 threaded with the end mounting seat 18, a telescopic block 22 is fixed to the upper end of the lower sliding rod 20, a sliding cavity 23 is opened in the telescopic block 22, a cam 24 is rotatably connected in the sliding cavity 23, a sliding plate 26 is provided at the lower end of the lower sliding rod 20 and the lower sliding rod 20 can slide up and down relative to the sliding cavity 23, a spring 25 is sleeved at the end of the lower sliding rod 20, and the two ends of the spring 25 are respectively against the upper end of the sliding cavity 23 and the sliding plate 26 so that the sliding plate 26 is always in contact with the cam 24, and an inner hexagon wrench is also included, and the cam 24 is opened A hexagonal groove 27 that can cooperate with an inner hexagonal wrench is provided on the telescopic block 22 with a through hole for the inner hexagonal wrench to be inserted into the hexagonal groove 27. By moving the above-mentioned arrangement, the cam 24 is driven to rotate by the inner hexagonal wrench during use, so that the sliding rod 20 can slide up and down along the sliding cavity 23. The cam 24 is rotated in a circular manner so that the length of the sliding rod 7 can float within a certain range. In the early stage of fracture healing, when fibrous connection and cartilage are formed at the fracture site, slight floating at the fracture site can promote the healing of the fracture site. The above-mentioned arrangement helps to promote the connection at the fracture site on the basis of accurate reduction.
[0038] The above is only an embodiment of the present invention, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.
Claims
1. A fracture traction device, characterized in that: It includes a proximal support unit, a fixing screw, a distal support unit and multiple auxiliary reduction parts. The proximal support unit includes two proximal support rings, and the distal support unit includes two distal support rings. The proximal support ring and the distal support ring are circumferentially evenly provided with multiple connecting holes. Both the proximal support ring and the distal support ring are detachably provided with at least one needle fixing part. The needle fixing part includes a needle fixing device and a bone screw with an end fixed on the needle fixing device; the auxiliary reduction parts include a guide slide and a sliding rod. The guide slides are circumferentially arranged on the distal support ring close to the fracture point. One end of the sliding rod is fixed on the proximal support ring close to the fracture point, and the other end is inserted into the corresponding guide slide and the two can slide relative to each other.
2. A fracture traction device according to claim 1, characterized in that: The auxiliary resetting part also includes a rotating base and an end mounting seat. The rotating base includes a base and a rotating disk arranged on the base. The base can be detachably fixed on the connecting hole. Arc-shaped sliding holes are symmetrically arranged on both sides of the rotating disk. A guide sliding groove is opened in the guide sliding seat. A pushing block part that can slide against the end of the sliding rod is provided in the guide sliding groove. Connecting screws are fixed at both ends of the bottom of the guide sliding seat. The two connecting screws pass through the corresponding arc-shaped sliding holes respectively, and the ends of the connecting screws are threadedly connected with fixing nuts.
3. A fracture traction device according to claim 2, characterized in that: The auxiliary resetting part also includes a rotating base and an end mounting seat. The rotating base includes a base and a rotating disk arranged on the base. The base can be detachably fixed on the connecting hole. Arc-shaped sliding holes are symmetrically arranged on both sides of the rotating disk. A guide sliding groove is opened in the guide sliding seat. A pushing block part that can slide against the end of the sliding rod is provided in the guide sliding groove. Connecting screws are fixed at both ends of the bottom of the guide sliding seat. The two connecting screws pass through the corresponding arc-shaped sliding holes respectively, and the ends of the connecting screws are threadedly connected with fixing nuts.
4. A fracture traction device according to claim 3, characterized in that: The push block part includes a push block and a push block screw. A V-shaped groove is opened on one side of the push block, and the V-shaped groove is against the sliding rod. A rotating hole is opened on the other side of the push block. A clamping part is provided on the push block screw near the push block side. The clamping part is inserted into the rotating hole and clamped with the push block and can rotate relative to the rotating hole. The other end of the push block screw passes through the guide slide, and the push block screw is threadedly connected to the guide slide.
5. A fracture traction device according to claim 4, characterized in that: A rotating block is fixed at the end of the push block screw away from the push block. The rotating block is in a cube shape, and different marks are engraved on the four surfaces of the rotating block rotating along the rotation direction of the push block screw.
6. A fracture traction device according to claim 5, characterized in that: The upper end surface of the sliding rod is provided with threads, the end mounting seat is sleeved on the sliding rod and threadedly connected with the sliding rod, the end of the sliding rod is also threadedly connected with a connecting nut, and the proximal support ring is located between the end mounting seat and the connecting nut.
7. A fracture traction device according to claim 6, characterized in that: The outer surface of the end mounting seat is provided with a plurality of cut surfaces.
8. A fracture traction device according to claim 7, characterized in that: The sliding rod comprises a lower sliding rod and an upper sliding rod threadedly connected to an end mounting seat; a shaft sleeve is fixed to the upper end of the lower sliding rod, and the shaft sleeve can be sleeved on the outer side of the lower end of the lower sliding rod and threadedly connected thereto.