A bone transfer device for skin and soft tissue in orthopedics

Abstract

The invention discloses an orthopedic skin and soft tissue bone transport device, which is characterized by comprising: an internal fixation steel plate, a movable slider, a first gear, a second gear, a chain, a support rod, a rotating handle, a first fixing screw, and a second fixing screw; the internal fixation steel plate comprises a steel plate head, a steel plate body, a steel plate tail, a first threaded hole, a sliding track, a second threaded hole, and a chain track; the slider comprises a metal block, a connecting ear, and a third threaded hole; the support rod comprises a connecting shaft, a ratchet, and a pawl; the invention can slowly pull the cut free bone segment during the bone transport operation, and at the same time, the device causes less trauma to the patient's skin and soft tissue, can be transported at a fixed distance, and can be directly fixed on the internal fixation steel plate with screws after the transport is completed, which completely solves the problems of external fixation wearing time and skin and soft tissue cutting, and is easy to operate and has a stable structure.

Description

Technical Field

[0001] The invention belongs to the field of medical instruments, and in particular relates to a bone transport device within skin and soft tissue for orthopedics. Background Art

[0002] Bone transfer is a method of cutting the bone at the proximal or distal end of the bone defect by applying certain techniques, and gradually moving the cut free bone segment to the bone defect with a special external fixator. New bone tissue will form on the traces left by the cut free bone segment until the bone defect is repaired. It is the standard treatment method for large bone defects at this stage. In previous treatments, an external fixator was used to fix the free bone segment for bone transfer. This method caused great trauma to the tissue at the patient's bone transfer site, and cutting of the external fixation needle track was inevitable during the transfer process. In addition, if the external fixator is used alone, the patient will need to wear the external fixator for a longer time after the bone transfer is completed to wait for new bone tissue. Bone mineralization; In recent years, some scholars have proposed a combination of internal and external fixation. After the external fixation is removed, internal fixation is used to allow it to mineralize naturally, reducing the wearing time of external fixation and achieving certain results. However, the problem of external fixation traction causing trauma to skin and soft tissue has not been solved. Therefore, an orthopedic skin and soft tissue internal bone transport device can slowly pull the severed free bone segment during bone transport surgery. At the same time, the device causes less trauma to the patient's skin and soft tissue, can be moved at a fixed distance, and can be directly fixed on the internal fixation plate with screws after the removal. This completely solves the problems of external fixation wearing time and skin and soft tissue cutting, and is easy to operate and has a stable structure. Summary of the invention

[0003] The present invention provides an orthopedic skin and soft tissue bone transport device, which can slowly pull the cut free bone segment during the bone transport operation. At the same time, the device causes less trauma to the patient's skin and soft tissue, can be transported at a fixed distance, and can be directly fixed on the internal fixation steel plate with screws after the transport is completed, which completely solves the problems of external fixation wearing time and skin and soft tissue cutting, and is easy to operate and has a stable structure.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is an orthopedic skin soft tissue bone transport device, including an internal fixation steel plate, a movable slider, a first gear, a second gear, a chain, a support rod, a rotating handle, a first fixing screw, and a second fixing screw; the internal fixation steel plate includes a steel plate head, a steel plate body, a steel plate tail, a first threaded hole, a sliding track, a second threaded hole, and a chain track; the slider includes a metal block, a connecting ear, and a third threaded hole; the support rod includes a connecting shaft, a ratchet, and a pawl;

[0005] The upper and lower ends of the internal fixing steel plate are fixed to the patient's bone by a first fixing screw, and the movable slider is fixed to the bone to be moved by a second screw. At the same time, the fixed slider is movably connected to the sliding track of the steel plate body of the internal fixing steel plate. A first gear is hinged inside the internal fixing steel plate near the head of the steel plate, and a second gear is hinged inside the internal fixing steel plate near the tail of the steel plate. A chain is arranged in the chain track of the internal fixing steel plate, and the chain bypasses the first gear and connects to the second gear on the right side of the movable slider. The right end of the support rod is connected to the second gear position corresponding to the internal fixing steel plate, and the left end of the support rod is movably connected to the right end of the rotating handle.

[0006] Furthermore, the lower end of the steel plate head of the internal fixed steel plate is connected to the upper end of the steel plate body, and the lower end of the steel plate body is connected to the upper end of the steel plate tail. The steel plate head is provided with dispersed first threaded holes, and the first threaded holes have steps. A row of equidistant second threaded holes is provided on the axis of the steel plate body, and the second threaded holes have steps. At the same time, a sliding track is provided on the axis of the steel plate body, and the sliding track passes through the second threaded hole. The width of the sliding track is smaller than the diameter of the second threaded hole. A sliding groove is provided on the inner side wall of the sliding track, and the sliding groove extends to the chain track. Chain tracks are provided on both sides of the second threaded hole on the steel plate body, and the chain track bypasses the first gear and the second gear.

[0007] Furthermore, the width of the metal block of the movable slider is consistent with the width of the sliding track, and the thickness is slightly less than the thickness of the internal fixed steel plate. Two connecting ears are symmetrically connected on the left and right sides of the metal block, and three third threaded holes are provided on the front and rear axis of the metal block, and the third threaded holes are through-through from top to bottom;

[0008] Furthermore, the right end of the support rod is connected to the outer wall of the inner fixed steel plate corresponding to the second gear position, and the right end is movably connected to the rotating handle. A connecting shaft is provided at the inner axis position of the support rod, and the right end of the connecting shaft is connected to the rotating shaft of the second gear. The side wall of a section of the left end of the connecting shaft is hexagonal, and a ratchet is connected to the middle of the connecting shaft. The ends of two ratchet pawls are respectively hinged inside the support rod at the upper and lower positions of the ratchet.

[0009] Furthermore, the nuts and screw rods of the first fixing screw and the second fixing screw are both provided with threads, a hexagonal hole is provided at the axis of the top of the nut, and the diameter of the second fixing screw is smaller than the diameter of the first fixing screw.

[0010] Another object of the present invention is to provide a principle and method of use of a bone transport device in skin and soft tissue for orthopedics:

[0011] The device for bone transfer within skin and soft tissue for orthopedics comprises the following steps: first, an internal fixation steel plate is fixed on the bone under the patient's tissue, a support rod passes through the patient's skin, the head of the steel plate is connected to the upper bone segment by a first fixing screw, the tail of the steel plate is connected to the lower bone segment by a first fixing screw, and the movable slider is connected to the cut free bone segment by a second fixing screw; secondly, when performing bone transfer, the working part of the rotating handle is connected to the end of the support rod exposed to the patient's skin, so that the slot of the rotating handle clamps the left end of the connecting shaft; then, the rotating handle is rotated, and the connecting shaft drives the connecting shaft to move. The second gear rotates, thereby driving the chain to slide, and the sliding of the chain pulls the moving slider to move, and the movement of the moving slider will drive the bone connected to it to move; then, for each rotation of the rotating handle, the chain moves 1mm, and when the connecting shaft rotates, there will be a collision when the ratchet rotates and contacts the pawl, which will give feedback to the operator and enable the operator to control the distance of bone movement; finally, after the bone movement process is completed, the first fixing screw is passed through the second threaded hole to connect and fix the free bone segment after movement, and the internal fixation plate can be removed after the new bone is mineralized.

[0012] Beneficial effects of the present invention:

[0013] 1. This orthopedic bone transfer device can slowly pull the cut free bone segment during the bone transfer operation, so that the cut bone grows new bone, and the free bone segment gradually merges with the proximal bone or the distal bone, and the merged end gradually heals;

[0014] 2. This orthopedic bone transfer device within the skin and soft tissue has little trauma. All operations are performed on the internal fixation steel plate, and the transfer process is performed under the skin and soft tissue, eliminating more cumbersome external fixation brackets. Bone transfer only needs to be performed on the exposed support rod;

[0015] 3. This orthopedic bone transfer device has fixed-distance transfer and is easy to operate. Each rotation of the rotating wrench drives the chain to move 1mm, thereby driving the cut bone to move 1mm. The cut bone is pulled and moved by rotating the handle, and the rotation utilizes the lever principle to make it easier to apply force for bone transfer. The ratchet is provided with 8 ratchet teeth. When the ratchet and the pawl rotate and contact, feedback will be given to the operator, so that the operator can clearly know the number of rotations, thereby facilitating the operator to control the bone transfer distance.

[0016] 4. This orthopedic bone transport device within the skin and soft tissue has a stable structure, and the fixing screws and threaded holes are stepped. The nut can also rotate the thread to make the fixed steel plate connected to the bone more firmly. At the same time, the ratchet will limit the chain from moving after each rotation, so that the bone transport force is stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 The present invention is a schematic diagram of the structure of a bone transfer device within the skin and soft tissue for orthopedics;

[0019] Figure 2 It is a top view of an internal fixation steel plate of an orthopedic skin and soft tissue bone transport device;

[0020] Figure 3 The figure is a side cross-sectional view of an internal fixation steel plate of an orthopedic skin soft tissue bone transport device;

[0021] Figure 4 The present invention is a structural diagram of a movable slider of a bone transport device in skin and soft tissue for orthopedics;

[0022] Figure 5 The first fixing screw structure diagram of a bone transport device in skin and soft tissue for orthopedics;

[0023] Figure 6 This is a structural diagram of a support rod of a bone transport device within the skin and soft tissue for orthopedics;

[0024] Figure 7 The ratchet structure diagram of a bone transport device within the skin and soft tissue for orthopedics;

[0025] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0026] 1-internal fixed steel plate, 101-steel plate head, 102-steel plate body, 103-steel plate tail, 104-first threaded hole, 105-sliding track, 106-second threaded hole, 107-chain track, 2-moving slider, 201-metal block, 202-connecting ear, 203-third threaded hole, 3-first gear, 4-second gear, 5-chain, 6-support rod, 601-connecting shaft, 602-ratchet, 603-pawl, 7-rotating handle, 8-first fixing screw, 9-second fixing screw. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example

[0028] See also Figures 1 to 7 As shown, a structure of an orthopedic skin soft tissue bone transport device is characterized in that it includes: an internal fixing steel plate 1, a moving slider 2, a first gear 3, a second gear 4, a chain 5, a support rod 6, a rotating handle 7, a first fixing screw 8, and a second fixing screw 9; the internal fixing steel plate 1 includes a steel plate head 101, a steel plate body 102, a steel plate tail 103, a first threaded hole 104, a sliding track 105, a second threaded hole 106, and a chain track 107; the moving slider 2 includes a metal block 201, a connecting ear 202, and a third threaded hole 203; the support rod 6 includes a connecting shaft 601, a ratchet 602, and a ratchet 603;

[0029] The upper and lower ends of the internal fixation steel plate 1 are fixed to the patient's bone by a first fixing screw 8, and the movable slider 2 is fixed to the bone to be moved by a second fixing screw 9. At the same time, the fixed slider 2 is movably connected to the sliding track 105 of the steel plate body 102 of the internal fixation steel plate 1. The first gear 3 is hinged inside the internal fixation steel plate 1 near the steel plate head 101, and the second gear 4 is hinged inside the internal fixation steel plate 1 near the steel plate tail 103. The chain 5 is arranged in the chain track 107 of the internal fixation steel plate 1. The chain 5 bypasses the first gear 3 and is connected to the second gear 4 on the right side of the movable slider 2. The right end of the support rod 6 is connected to the position of the internal fixation steel plate 1 corresponding to the second gear 4, and the left end of the support rod 6 is movably connected to the right end of the rotating handle 7; the chain 5 pulls the movable slider 2 to move, thereby driving the connected severed bone to be moved;

[0030] The lower end of the head 101 of the internal fixation plate 1 is connected to the upper end of the plate body 102, and the lower end of the plate body 102 is connected to the upper end of the plate tail 103. Dispersed first threaded holes 104 are provided on the head steel 101 for connecting the first fixing screw 8 to fix the plate to the bone. The first threaded holes 104 have steps, which can tighten the first fixing screw 8 more firmly. A row of equidistant second threaded holes 106 are provided on the axis of the plate body 102. The second threaded holes 106 have steps, and their functions are the same as those of the first threaded holes. A sliding track 105 is provided on the axis of the steel plate body 102 for movably connecting the moving slider 2. The sliding track 105 passes through the second threaded hole 106. The width of the sliding track 105 is smaller than the diameter of the second threaded hole 106. A sliding groove is provided on the inner side wall of the sliding track 105 for limiting the moving slider so that the moving slider will not fall off. The sliding groove extends to the chain track 107. Chain tracks 107 are provided on both sides of the second threaded hole 106 on the steel plate body 102. The chain track 107 bypasses the first gear 3 and the second gear 4. The chain track 107 is used to place the chain 5.

[0031] The width of the metal block 201 of the movable slider 2 is consistent with the width of the sliding track 105, and the thickness is slightly smaller than the thickness of the internal fixing steel plate 1. Two connecting ears 202 are symmetrically connected on the left and right sides of the metal block 201. Three third threaded holes 203 are provided on the front and rear axis positions of the metal block 201. The third threaded holes 203 are penetrated from top to bottom and are used to connect the second fixing screws 9 to fix the movable slider 2 on the moved bone; the right end of the support rod 6 is connected to the outer wall of the internal fixing steel plate 1 corresponding to the position of the second gear 4, and the right end is movably connected to the rotating handle 7. A connecting shaft 601 is provided at the internal axis position of the support rod 6. The right end of the connecting shaft 601 is connected to the rotating shaft of the second gear 4. The side wall of the left end of the connecting shaft 601 is hexagonal, which is convenient for clamping the rotating handle 7. A ratchet 602 is connected to the middle of the connecting shaft 601. The ends of two ratchet pawls 603 are hinged inside the upper and lower support rods of the ratchet 602 respectively; the ratchet 602 is used to rotate the second gear 4 to limit the position after rotation, providing a constant and stable traction force for bone transfer. The connecting shaft 601 rotates one circle to drive the chain 5 to slide 1mm, thereby driving the moving slider 2 to move 1mm. The ratchet 602 has eight ratchets, which is convenient for medical staff to have a sense of measure when turning the rotating handle. The ratchet will give feedback to the operator every time it rotates a ratchet tooth, so that the medical staff can accurately control the bone transfer distance.

[0032] The nuts and screw rods of the first fixing screw 8 and the second fixing screw 9 are both provided with threads, and a hexagonal hole is provided at the axis center of the top of the nut to facilitate installation and disassembly using tools. The diameter of the second fixing screw 9 is smaller than that of the first fixing screw 8.

[0033] Specific operation mode and implementation principle:

[0034] The device for bone transfer within skin and soft tissue for orthopedics comprises the following steps: first, an internal fixing steel plate 1 is fixed to the bone under the patient's tissue, a supporting rod 6 passes through the patient's skin, a steel plate head 101 is connected to the upper bone segment by a first fixing screw 8, a steel plate tail 103 is connected to the lower bone segment by a first fixing screw 8, and a movable slider 2 is connected to the cut free bone segment by a second fixing screw 9; secondly, when performing bone transfer, a working part of a rotating handle 7 is connected to the end of the supporting rod 6 exposed to the patient's skin, so that the slot of the rotating handle 7 is clamped to the left end of the connecting shaft 601; then, the rotating handle 7 is rotated, and the connecting shaft 601 is driven by the connecting shaft 601. The second gear 4 is driven to rotate, thereby driving the chain 5 to slide, and the sliding of the chain 5 pulls the movable slider 2 to move, and the movement of the movable slider 2 will drive the bone connected to it to move; then, every time the rotating handle 7 rotates one circle, the chain 5 moves 1mm, and when the connecting shaft 601 rotates, there will be a collision when the ratchet 602 rotates and contacts the pawl 603, which will give feedback to the operator and enable the operator to control the distance of bone movement; finally, after the bone movement process is completed, the first fixing screw 8 is passed through the second threaded hole 106 to connect and fix the free bone segment after movement, and the internal fixation plate can be removed after the new bone is mineralized.

[0035] In summary, 1. This orthopedic bone transfer device can slowly pull the cut free bone segment during the bone transfer surgery, so that new bone grows out of the cut bone, and the free bone segment gradually meets the proximal bone or the distal bone, and the meeting end gradually heals;

[0036] 2. This orthopedic bone transfer device within the skin and soft tissue has little trauma. All operations are performed on the internal fixation steel plate, and the transfer process is performed under the skin and soft tissue, eliminating more cumbersome external fixation brackets. Bone transfer only needs to be performed on the exposed support rod;

[0037] 3. This orthopedic bone transfer device has fixed-distance transfer and is easy to operate. Each rotation of the rotating wrench drives the chain to move 1mm, thereby driving the cut bone to move 1mm. The cut bone is pulled and moved by rotating the handle, and the rotation utilizes the lever principle to make it easier to apply force for bone transfer. The ratchet is provided with 8 ratchet teeth. When the ratchet and the pawl rotate and contact, feedback will be given to the operator, so that the operator can clearly know the number of rotations, thereby facilitating the operator to control the bone transfer distance.

[0038] 4. This orthopedic bone transport device within the skin and soft tissue has a stable structure, and the fixing screws and threaded holes are stepped. The nut can also rotate the thread to make the fixed steel plate connected to the bone more firmly. At the same time, the ratchet will limit the chain from moving after each rotation, so that the bone transport force is stable.

[0039] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0040] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A bone transfer device for skin and soft tissue for orthopedics, characterized in that: include: An internal fixed steel plate, a movable slider, a first gear, a second gear, a chain, a support rod, a rotating handle, a first fixing screw, and a second fixing screw; the internal fixed steel plate includes a steel plate head, a steel plate body, a steel plate tail, a first threaded hole, a sliding track, a second threaded hole, and a chain track; the slider includes a metal block, a connecting ear, and a third threaded hole; the support rod includes a connecting shaft, a ratchet, and a pawl; The upper and lower ends of the internal fixing steel plate are fixed to the patient's bone by a first fixing screw, and the movable slider is fixed to the bone to be moved by a second screw. At the same time, the fixed slider is movably connected to the sliding track of the steel plate body of the internal fixing steel plate. A first gear is hinged inside the internal fixing steel plate near the head of the steel plate, and a second gear is hinged inside the internal fixing steel plate near the tail of the steel plate. A chain is arranged in the chain track of the internal fixing steel plate, and the chain bypasses the first gear and connects to the second gear on the right side of the movable slider. The right end of the support rod is connected to the second gear position corresponding to the internal fixing steel plate, and the left end of the support rod is movably connected to the right end of the rotating handle. The lower end of the steel plate head of the internal fixed steel plate is connected to the upper end of the steel plate body, and the lower end of the steel plate body is connected to the upper end of the steel plate tail. The steel plate head is provided with dispersed first threaded holes, and the first threaded holes have steps. A row of equidistant second threaded holes is provided on the axis of the steel plate body, and the second threaded holes have steps. At the same time, a sliding track is provided on the axis of the steel plate body, and the sliding track passes through the second threaded hole. The width of the sliding track is smaller than the diameter of the second threaded hole. A sliding groove is provided on the inner side wall of the sliding track, and the sliding groove extends to the chain track. Chain tracks are provided on both sides of the second threaded hole on the steel plate body, and the chain track bypasses the first gear and the second gear. The right end of the support rod is connected to the outer wall of the internal fixed steel plate corresponding to the second gear position, and the right end is movably connected to the rotating handle. A connecting shaft is provided at the internal axis position of the support rod. The right end of the connecting shaft is connected to the rotating shaft of the second gear. The side wall of the left end of the connecting shaft is hexagonal, and a ratchet is connected to the middle of the connecting shaft. The ends of two pawls are hinged inside the support rod at the upper and lower positions of the ratchet.

2. The orthopedic bone transfer device in skin and soft tissue according to claim 1, characterized in that: The width of the metal block of the movable slider is consistent with the width of the sliding track, and the thickness is slightly smaller than the thickness of the internal fixed steel plate. Two connecting ears are symmetrically connected on the left and right sides of the metal block, and three third threaded holes are provided on the front and rear axis positions of the metal block, and the third threaded holes are connected up and down.

3. The orthopedic bone transport device in skin and soft tissue according to claim 1, characterized in that: The nuts and screw rods of the first fixing screw and the second fixing screw are both provided with threads, a hexagonal hole is provided at the axis of the top of the nut, and the diameter of the second fixing screw is smaller than that of the first fixing screw.

4. A method for using the orthopedic bone transport device within skin and soft tissue according to any one of claims 1 to 3, characterized in that: The device for bone transfer within skin and soft tissue for orthopedics comprises the following steps: first, an internal fixation steel plate is fixed on the bone under the patient's tissue, a support rod passes through the patient's skin, the head of the steel plate is connected to the upper bone segment by a first fixing screw, the tail of the steel plate is connected to the lower bone segment by a first fixing screw, and the movable slider is connected to the cut free bone segment by a second fixing screw; secondly, when performing bone transfer, the working part of the rotating handle is connected to the end of the support rod exposed to the patient's skin, so that the slot of the rotating handle clamps the left end of the connecting shaft; then, the rotating handle is rotated, and the connecting shaft drives the connecting shaft to move. The second gear rotates, thereby driving the chain to slide, and the sliding of the chain pulls the moving slider to move, and the movement of the moving slider will drive the bone connected to it to move; then, for each rotation of the rotating handle, the chain moves 1mm, and when the connecting shaft rotates, there will be a collision when the ratchet rotates and contacts the pawl, which will give feedback to the operator and enable the operator to control the distance of bone movement; finally, after the bone movement process is completed, the first fixing screw is passed through the second threaded hole to connect and fix the free bone segment after movement, and the internal fixation plate can be removed after the new bone is mineralized.

5. Use of the orthopedic bone transport device within skin and soft tissue according to any one of claims 1 to 3 in bone transport surgery.

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