A cable-based bone transport device

Abstract

The present invention discloses a cable-based bone transport device, which connects a first bone and a second bone through an intramedullary nail; a fixing assembly is fixed to the first bone and the second bone, and the middle is connected by a transport assembly; then the cable is passed through the skin through the inner (outer) side of the distal end of the second bone into the second medullary cavity, and then fixed to the outside of the distal bone cortex after entering the first medullary cavity, and the outer part of the cable is connected to the transport assembly; the first bone is cut into the first bone fixed by the fixing assembly and the transport bone segment dragged by the cable. The moving parts on the transport assembly are driven regularly to drive the cable, thereby driving the transport bone segment to gradually move closer to the second bone, so that the transport bone segment finally contacts the second bone, completing the bone transport. By dragging the cable to pull the transport bone segment closer to the second bone along the intramedullary nail, a good force line can be maintained to avoid deformity; the skin and soft tissue structure of the transport bone segment is not damaged; and the dragging transport method is simpler than the traditional method.

Description

Technical Field

[0001] The present invention relates to the technical field of orthopedic medical devices, and in particular to a cable-based bone transport device. Background Art

[0002] The bone transport device is a special device used to achieve bone lengthening (and / or bone transport); its working principle is: for the site of bone defect, the proximal or distal end of the bone defect is osteotomized, and the integrity of the periosteum, soft tissue and blood supply are preserved; then the bone transport device is fixed to both ends of the bone, and the severed transported bone segment is pulled to make the transported bone segment move slowly toward the defect. In this process, the regenerative potential of the human body tissue is activated, and new bone grows in the osteotomy gap, ultimately achieving the purpose of repairing the bone defect and lengthening the bone shortening.

[0003] Existing bone transport devices use a ring-type external fixator or a unilateral external fixator, and use external fixators or Kirschner wires to pull the free bone for traction. This solution is time-consuming and labor-intensive to assemble, and the operation is cumbersome. It can easily cause the transported bone segment to deviate from its position during the traction process, causing the new bone that eventually grows together to bend or deviate. In addition, because the external fixators or Kirschner wires are directly fixed to the transported bone segment through the skin, the integrity of the skin and soft tissue will be destroyed during the traction process, and may even damage blood vessels and nerve tissue, causing pain to the patient while also increasing the risk of infection. Summary of the Invention

[0004] The main purpose of the present invention is to provide a cable-based bone transport device, which aims to solve the problems of existing bone transport devices, such as time-consuming and labor-intensive assembly, cumbersome operation, and easy position deviation of the transported bone segments during the traction process. In addition, external fixation nails or Kirschner wires will destroy the integrity of the skin and soft tissue during the traction process, and may even damage blood vessels and nerve tissue, causing pain to the patient while also increasing the risk of infection.

[0005] To achieve the above object, the technical solution proposed by the present invention is:

[0006] A cable-based bone transport device comprises a fixing assembly, a transport assembly, a moving part, an intramedullary nail and a cable; the transport assembly comprises a first screw rod and a second screw rod parallel to each other; the number of the fixing assemblies is at least 2; the fixing assembly is arranged on the transport assembly; the fixing assembly is used to fix the transport assembly to the first bone and the second bone respectively located at the two ends of the transport bone segment; the intramedullary nail is sequentially inserted into the intramedullary cavity of the first bone, the intramedullary cavity of the transport bone segment and the intramedullary cavity of the second bone; the moving part is movably connected to the transport assembly; one end of the cable is used to connect to the transport bone segment, and the other end of the cable is used to pass through the intramedullary cavity of the transport bone segment, penetrate into the intramedullary cavity of the second bone, and then pass through the bone wall of the second bone, and then extend out of the limb and connect to the moving part; the moving part can move along the longitudinal axis of the first screw rod in the direction close to the first bone to drive the cable, and then drive the transport bone segment to move along the axis of the intramedullary nail in the direction close to the second bone.

[0007] Preferably, the carrying assembly also includes a first connecting rod; the two ends of the first connecting rod are respectively connected to the first screw rod and the second screw rod; the first connecting rod is close to the point where the cable extends from the limb; the other end of the cable extends from the limb, passes around the first connecting rod and is connected to the moving part.

[0008] Preferably, the carrying assembly also includes an L-shaped connecting sleeve and a second connecting rod; the L-shaped connecting sleeve is provided with a first threaded hole and a second threaded hole, and the central axis of the first threaded hole is at a preset angle to the central axis of the second threaded hole; the number of the L-shaped connecting sleeves is 2; one end of the first screw rod is fitted and passed through the first threaded hole of one of the L-shaped connecting sleeves, and one end of the second screw rod is fitted and passed through the first threaded hole of the other L-shaped connecting sleeve; the two ends of the second connecting rod are respectively embedded in the second threaded hole of one of the L-shaped connecting sleeves and the second threaded hole of the other L-shaped connecting sleeve, and the second connecting rod can rotate; the end of the second threaded hole away from the second connecting rod is screwed with a first screw; the second connecting rod is close to the point where the cable extends from the limb; the other end of the cable extends from the limb, bypasses the second connecting rod and is connected to the moving part.

[0009] Preferably, the movable part includes a first nut, a second nut and a first connecting cross arm; the first nut is screwed on the first screw rod; the second nut is screwed on the second screw rod; the first two ends of the first connecting cross arm are respectively provided with a first through hole and a second through hole; the first screw rod is movably passed through the first through hole; the second screw rod is movably passed through the second through hole; the other end of the cable is connected to the first connecting cross arm; the first nut and the second nut are both used to abut the side of the first connecting cross arm close to the first connecting rod.

[0010] Preferably, the movable part also includes a third nut and a fourth nut; the third nut is screwed on the first screw rod, and the first nut and the third nut are respectively located on both sides of the first connecting cross arm; the fourth nut is screwed on the second screw rod, and the second nut and the fourth nut are respectively located on both sides of the first connecting cross arm; the third nut and the fourth nut are both used to abut the side of the first connecting cross arm away from the first connecting rod.

[0011] Preferably, the first nut and the second nut are both hexagonal nuts; the first nut is formed with 6 outer walls; the 6 outer walls of the first nut are respectively provided with different numerical identifications; the second nut is formed with 6 outer walls; the 6 outer walls of the second nut are respectively provided with different numerical identifications.

[0012] Preferably, the fixing assembly includes a fixing plate, a buckling plate, a first fixing rod and a second screw; the fixing plate is provided with a plurality of third threaded holes; the buckling plate is provided with a plurality of fourth threaded holes; the third threaded holes and the fourth threaded holes correspond to each other one by one; the buckling plate is provided with a first arcuate groove and a second arcuate groove; the extending direction of the first arcuate groove is parallel to the extending direction of the second arcuate groove;

[0013] The buckle plate is buckled with the fixing plate, and the third threaded hole is directly opposite to the corresponding fourth threaded hole. The first screw rod passes through the first arc groove, and the second screw rod passes through the second arc groove. The second screw is screwed into the third threaded hole and the fourth threaded hole in sequence to fix the buckle plate to the fixing plate, and the buckle plate and the fixing plate clamp and fix the first screw rod and the second screw rod.

[0014] The fixing plate is provided with a plurality of fifth threaded holes; one end of the first fixing rod is provided with a second external thread; the first fixing rod is screwed into the fifth threaded hole through the second external thread, and the other end of the fixing rod is used to be embedded in the first bone or the second bone; the first fixing rod of at least one of the fixing assemblies is used to be embedded in the first bone, and the first fixing rod of at least one of the fixing assemblies is used to be embedded in the second bone.

[0015] Preferably, it also includes a first clamping piece; one end of the cable is connected to the first clamping piece, and the cable is used to pass through the cable hole opened in the bone wall of the transported bone segment, and extend into the intramedullary cavity of the transported bone segment, extend from the end of the transported bone segment close to the first connecting rod, and then enter the intramedullary cavity of the second bone, and then pass through the exit hole opened in the bone wall of the second bone, extend from the limb and be connected to the moving component; the first clamping piece is used to abut the outer wall of the bone of the transported bone segment.

[0016] Preferably, an eleventh through hole and a twelfth through hole are respectively formed at both ends of the intramedullary nail; the eleventh through hole and the twelfth through hole are used for passing a fixing nail.

[0017] Preferably, the conveying assembly also includes a second connecting cross arm, a fifth nut, a sixth nut, a seventh nut and an eighth nut; a fifth through hole and a sixth through hole are respectively provided at both ends of the second connecting cross arm; the first screw rod is movably passed through the fifth through hole; the second screw rod is movably passed through the sixth through hole; a seventh through hole is provided in the middle of the second connecting cross arm; the cable is movably passed through the seventh through hole; the fifth nut and the sixth nut are both screwed on the first screw rod, and the fifth nut and the sixth nut are respectively located on both sides of the second connecting cross arm; the seventh nut and the eighth nut are both screwed on the second screw rod, and the seventh nut and the eighth nut are respectively located on both sides of the second connecting cross arm; the fifth nut and the seventh nut are both used to abut the side of the second connecting cross arm close to the first connecting rod, and the sixth nut and the eighth nut are both used to abut the side of the second connecting cross arm away from the first connecting rod.

[0018] Compared with the prior art, the present invention has at least the following beneficial effects:

[0019] 1. The cable-based bone transport device proposed in the present invention first secures a first bone, a second bone, and a transport assembly using a fixing assembly, thereby maintaining the relative positions of the first and second bones. One end of the cable is then connected to the transport bone segment, and the other end of the cable is passed through the intramedullary cavity of the transport bone segment, then into the intramedullary cavity of the second bone, and then through the bone wall of the second bone, before extending from the limb and connecting to a movable component. During use, the movable component is periodically driven to drive the cable, thereby driving the transport bone segment toward the second bone, thereby gradually approaching the second bone, thereby activating the regenerative potential of human tissue. In this process, new bone grows between the first and second bones, ultimately bringing the transport bone segment into contact with the second bone, and allowing the transport bone segment and the second bone to grow together. Throughout use, the cable pulls the transport bone segment toward the second bone, preventing positional deviation of the transport bone segment during the traction process. Furthermore, the cable can be passed through a small hole and exit the limb, avoiding continuous damage to the skin and soft tissue of the transport segment during the traction process, thereby significantly reducing the patient's pain and infection risk.

[0020] 2. The cable-based bone transport device proposed in the present invention is easy to assemble, has reliable fixation, and relatively simple surgical operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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 the structures shown in these drawings without paying any creative work.

[0022] Figure 1 A schematic diagram of an embodiment of the cable-based bone transport device proposed by the present invention in use;

[0023] Figure 2 This is a front structural diagram of an embodiment of a cable-based bone transport device proposed in the present invention;

[0024] Figure 3 This is a front structural schematic diagram of another embodiment of the cable-based bone transport device proposed by the present invention;

[0025] Figure 4 This is a structural schematic diagram of an L-shaped connecting sleeve and related components of another embodiment of the cable-based bone transport device proposed by the present invention;

[0026] Figure 5 This is a schematic structural diagram of a fixing assembly of another embodiment of the cable-based bone transport device proposed by the present invention;

[0027] Figure 6 for Figure 2 A magnified diagram of the details at center A;

[0028] Figure 7 This is a schematic diagram of the three-dimensional structure of a fixing assembly of an embodiment of a cable-based bone transport device proposed by the present invention;

[0029] Figure 8 This is a structural schematic diagram of the moving parts and related parts of another embodiment of the cable-based bone transport device proposed by the present invention.

[0030] Description of reference numerals:

[0031] 110, first bone; 120, transported bone segment; 130, intramedullary cavity of transported bone segment; 140, second bone; 150, intramedullary cavity of second bone; 160, cable; 170, cable hole; 180, first retaining member; 190, exit hole; 210, second fixing rod; 220, first screw rod; 230, second screw rod; 240, first connecting rod; 250, first connecting sleeve; 260, second connecting sleeve; 270, first connecting cross arm; 280, first First nut; 290, second nut; 310, third nut; 320, fourth nut; 330, third through hole; 340, second retaining member; 350, second connecting cross arm; 360, fifth nut; 370, sixth nut; 380, seventh nut; 390, eighth nut; 410, seventh through hole; 420, first connecting seat; 430, second connecting seat; 440, first pressure block; 450, second pressure block; 460, first threaded rod; 470 , second threaded rod; 480, sixth threaded hole; 490, seventh threaded hole; 510, first outer square nut; 520, second outer square nut; 530, first gap; 540, second gap; 550, L-shaped connecting sleeve; 560, second connecting rod; 570, first threaded hole; 580, second threaded hole; 590, fixing plate; 610, buckling plate; 620, first arc groove; 630, second arc groove; 640, third threaded hole; 65 0, fourth threaded hole; 660, second screw; 670, fifth threaded hole; 680, fourth through hole; 690, first fixing rod; 710, first outer gear ring; 720, second outer gear ring; 730, driving gear; 740, third connecting cross arm; 750, tenth through hole; 760, turning handle; 770, ninth nut; 780, tenth nut; 790, eleventh nut; 810, twelfth nut; 820, intramedullary nail; 830, first screw.

[0032] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0034] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0035] In addition, the terms "first," "second," and so on, used in this disclosure are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referenced. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this disclosure, "plurality" means at least two, such as two or three, unless otherwise specifically defined.

[0036] In the present invention, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0037] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in this field can implement it. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0038] The present invention provides a cable-based bone transport device.

[0039] Please refer to the attached Figure 1 -Attached Figure 8In one embodiment of a cable-based bone transport device proposed by the present invention, the cable-based bone transport device includes a fixing assembly, a transport assembly, a moving component, an intramedullary nail 820, and a cable 160; the transport assembly includes a first screw rod 220 and a second screw rod 230 parallel to each other; the number of fixing assemblies is at least 2; the fixing assembly is arranged on the transport assembly; the fixing assembly is used to fix the transport assembly to the first bone 110 and the second bone 140 respectively located at both ends of the transport bone segment 120; the intramedullary nail 820 is sequentially inserted into the intramedullary cavity of the first bone 110, the intramedullary cavity 130 of the transport bone segment, and the intramedullary cavity 150 of the second bone (specifically, a transverse fixing rod (not shown) is inserted between the intramedullary nail 820 and the first bone 110 to allow the intramedullary nail 820 to be inserted into the intramedullary cavity 150 of the first bone 110). One end of the nail 820 is fixed to the first bone 110; a transverse fixing rod (not shown) is provided between the intramedullary nail 820 and the second bone 140 to fix the other end of the intramedullary nail 820 to the second bone 140); the movable component is movably connected to the transport assembly; one end of the cable 160 is used to connect to the transport bone segment 120, and the other end of the cable 160 is used to pass through the intramedullary cavity 130 of the transport bone segment, penetrate into the intramedullary cavity 150 of the second bone, and then pass through the bone wall of the second bone 140, and then extend out of the limb and connect to the movable component; the movable component can move along the longitudinal axis of the first wire rod 220 in a direction close to the first bone 110, so as to drive the cable 160, and then drive the transport bone segment 120 to move along the axis of the intramedullary nail 820 in a direction close to the second bone 140.

[0040] The cable-based bone transport device proposed in the present invention first fixes the first bone 110, the second bone 140 and the transport assembly through a fixing assembly, thereby maintaining the relative positions of the first bone 110 and the second bone 140; then, by connecting one end of the cable 160 to the transport bone segment 120, the other end of the cable 160 is passed through the intramedullary cavity 130 of the transport bone segment, penetrates into the intramedullary cavity 150 of the second bone, and then passes through the bone wall of the second bone 140, and then extends from the limb and is connected to the moving component. When in use, the moving component is driven periodically to drive the cable 160 (such as the attached Figure 1 As shown, in the specific implementation, the moving part moves at a speed of 1 mm per day, thereby driving the transported bone segment 120 to move toward the second bone 140 (as shown in the attached Figure 1As shown, the transport bone segment 120 is driven to move downward), thereby gradually approaching the second bone 140 to activate the regenerative potential of human tissue. In this process, new bone grows between the first bone 110 and the second bone 140, and finally the transport bone segment 120 contacts the second bone 140, so that the transport bone segment 120 and the second bone 140 are combined and grown together. During the entire use process, the transport bone segment 120 is radially pulled along the intramedullary nail 820 toward the second bone 140 by the cable 160, which can prevent the transport bone segment 120 from positional deviation during the pulling process. The cable 160 can pass through the limb through a small hole to avoid damage to the skin and soft tissue during the transport of the bone segment, thereby greatly reducing the patient's pain and infection risk.

[0041] In addition, as attached Figure 1-2 As shown, the transport assembly further includes a first connecting rod 240; the two ends of the first connecting rod 240 are respectively connected to the first screw rod 220 and the second screw rod 230; the first connecting rod 240 is close to the point where the cable 160 extends from the limb (i.e., close to the second bone 140, so that the cable 160 can be more conveniently wrapped around the first connecting rod 240 after passing through the limb); the other end of the cable 160 extends from the limb, passes around the first connecting rod 240, and is connected to the moving part; specifically, one end of the first screw rod 220 is connected to the first connecting sleeve 250, and one end of the second screw rod 230 is connected to the second connecting sleeve 260; the two ends of the first connecting rod 240 are respectively hinged to the first connecting sleeve 250 and the second connecting sleeve 260. This improves the structure of the transport assembly, allowing the first screw rod 220 and the second screw rod 230 to remain relatively fixed, and the cable 160 passes around the first connecting rod 240, making it easier for the moving part to pull the cable 160.

[0042] At the same time, as attached Figure 3-4 As shown, in another embodiment, the transport assembly also includes an L-shaped connecting sleeve 550 and a second connecting rod 560; the L-shaped connecting sleeve 550 is provided with a first threaded hole 570 and a second threaded hole 580, and the central axis of the first threaded hole 570 is at a preset angle (for example, 90°) to the central axis of the second threaded hole 580; the number of L-shaped connecting sleeves 550 is 2; one end of the first screw rod 220 is cooperated to pass through the first threaded hole 570 of one of the L-shaped connecting sleeves 550, and one end of the second screw rod 230 is cooperated to pass through the first threaded hole 570 of the other L-shaped connecting sleeve 550; the two ends of the second connecting rod 560 are respectively embedded in the second threaded hole 580 of one of the L-shaped connecting sleeves 550, and the second threaded hole 580 of the other L-shaped connecting sleeve 550, and the second connecting rod 560 can rotate; the end of the second threaded hole 580 away from the second connecting rod 560 is screwed with a first screw 830 to prevent the second connecting rod 560 from falling off from the second threaded hole 580.

[0043] The second connecting rod 560 is close to the point where the cable 160 extends from the limb; the other end of the cable 160 extends from the limb, passes around the second connecting rod 560 and is connected to the moving part.

[0044] This arrangement makes it easier to screw the first screw rod 220 or the second screw rod 230 into the L-shaped connecting sleeve 550, and then screw the two ends of the second connecting rod 560 into the second threaded holes 580 of the two L-shaped connecting sleeves 550 respectively, and the modularly arranged L-shaped connecting sleeves 550 are more practical.

[0045] In addition, as attached Figure 1-2 As shown, the movable component includes a first nut 280, a second nut 290, and a first connecting cross arm 270; the first nut 280 is screwed together with the first screw rod 220; the second nut 290 is screwed together with the second screw rod 230; a first through hole (not shown) and a second through hole (not shown) are respectively opened at both ends of the first connecting cross arm 270; the first screw rod 220 is movably inserted into the first through hole; the second screw rod 230 is movably inserted into the second through hole; the other end of the cable 160 is connected to the first connecting cross arm 270; the first nut 280 and the second nut 290 are both used to abut the side of the first connecting cross arm 270 close to the first connecting rod 240. When in use, it is only necessary to screw the first nut 280 and the second nut 290 respectively to drive the first connecting cross arm 270 to move away from the first connecting rod 240, thereby pulling the cable 160.

[0046] Specifically, the movable component further includes a second retaining member 340 (e.g., a U-shaped pin); a third through-hole 330 is defined in the middle of the first connecting cross arm 270; the other end of the cable 160 passes through the third through-hole 330 and connects to the second retaining member 340; and the second retaining member 340 abuts against the side of the first connecting cross arm 270 facing away from the first connecting rod 240. This completes the specific structure of the cable 160 connected to the movable component.

[0047] At the same time, the moving parts also include a third nut 310 and a fourth nut 320; the third nut 310 is screwed on the first screw rod 220, and the first nut 280 and the third nut 310 are respectively located on both sides of the first connecting cross arm 270; the fourth nut 320 is screwed on the second screw rod 230, and the second nut 290 and the fourth nut 320 are respectively located on both sides of the first connecting cross arm 270; the third nut 310 and the fourth nut 320 are both used to abut the side of the first connecting cross arm 270 away from the first connecting rod 240.

[0048] By setting the third nut 310 and the fourth nut 320, the first connecting cross arm 270 can be abutted to prevent the first connecting cross arm 270 from shaking; when the first connecting cross arm 270 needs to be moved, the third nut 310 and the fourth nut 320 need to be loosened first.

[0049] Specifically, the first nut 280 and the second nut 290 are both hexagonal nuts. The first nut 280 has six outer walls, each of which is labeled with a different numerical value (e.g., 1-6). The second nut 290 has six outer walls, each of which is labeled with a different numerical value (e.g., 1-6). This arrangement makes it easier for operators to understand the rotation angles of the first and second nuts 280, 290, and thus control the movement distance of the first connecting arm 270 each time.

[0050] In addition, as attached Figure 3 and attached Figure 5 As shown, the fixing assembly includes a fixing plate 590, a snap-fit ​​plate 610, a first fixing rod 690 and a second screw 660; the fixing plate 590 is provided with a plurality of third threaded holes 640; the snap-fit ​​plate 610 is provided with a plurality of fourth threaded holes 650; the third threaded holes 640 and the fourth threaded holes 650 correspond one to one; the snap-fit ​​plate 610 is provided with a first arcuate groove 620 and a second arcuate groove 630; the extension direction of the first arcuate groove 620 is parallel to the extension direction of the second arcuate groove 630.

[0051] The snap-fitting plate 610 is snapped together with the fixing plate 590, and the third threaded hole 640 is opposite to the corresponding fourth threaded hole 650. The first screw rod 220 is passed through the first arc groove 620, and the second screw rod 230 is passed through the second arc groove 630. The second screw 660 is screwed into the third threaded hole 640 and the fourth threaded hole 650 in sequence to fix the snap-fitting plate 610 to the fixing plate 590, and to clamp and fix the first screw rod 220 and the second screw rod 230.

[0052] The fixing plate 590 is provided with a plurality of fifth threaded holes 670 ; one end of the first fixing rod 690 is provided with a second external thread; the first fixing rod 690 is screwed into the fifth threaded hole 670 through the second external thread, and the other end of the fixing rod is used to be embedded in the first bone 110 or the second bone 140 .

[0053] The fastening plate 610 defines a fourth through hole 680 located between the first arcuate groove 620 and the second arcuate groove 630. A fifth threaded hole 670 is positioned opposite the fourth through hole 680, and the inner diameter of the fourth through hole 680 is larger than that of the fifth threaded hole 670. At least one first fixing rod 690 of the fixing assembly is configured to engage with the first bone 110, and at least one first fixing rod 690 of the fixing assembly is configured to engage with the second bone 140. In this embodiment, multiple first fixing rods 690 are provided in the same fixing assembly to enhance fixation capability.

[0054] During use, first screw the second screw 660 into the third threaded hole 640 and the fourth threaded hole 650 in sequence to fix the snap-fit ​​plate 610 to the fixing plate 590, and clamp the snap-fit ​​plate 610 and the fixing plate 590 to fix the first screw rod 220 and the second screw rod 230; then screw one end of the first fixing rod 690 into the fifth threaded hole 670, and then embed the other end of the first fixing rod 690 into the first bone 110 or the second bone 140, so that the first screw rod 220 and the second screw rod 230 are fixed to the first bone 110 and the second bone 140 respectively.

[0055] Specifically, the fixing plate can adopt different shapes according to actual conditions, such as a rectangle or other shapes corresponding to the bones.

[0056] As attached Figure 1 、 2 , 6 and 7, in another embodiment of the cable-based bone transport device proposed by the present invention, the fixing assembly includes a first connecting seat 420, a second connecting seat 430, a first pressing block 440, a second pressing block 450, a first threaded rod 460, a second threaded rod 470 and a second fixing rod 210; the first connecting seat 420 is rotatably connected to the second connecting seat 430; the first connecting seat 420 is provided with a sixth threaded hole 480, the first threaded rod 460 is movably provided in the first connecting seat 420, and is screwed into the sixth threaded hole 480 0; a first gap 530 is formed between the first pressure block 440 and the first connecting seat 420; the first gap 530 is used to pass the second fixing rod 210; a first external four-corner nut 510 is formed at the end of the first threaded rod 460 away from the first connecting block; the first external four-corner nut 510 is used to abut against the side of the first pressure block 440 away from the first connecting block, so that the first pressure block 440 and the first connecting seat 420 clamp and fix the second fixing rod 210; the second fixing rod 210 is used to be embedded in the first bone 110 or the second bone 140.

[0057] The second connecting seat 430 is provided with a seventh threaded hole 490, and the second threaded rod 470 is movably passed through the second connecting seat 430 and screwed into the seventh threaded hole 490; a second gap 540 is formed between the second pressure block 450 and the second connecting seat 430; the second gap 540 is used to pass the first screw rod 220 or the second screw rod 230; a second outer square nut 520 is formed at the end of the second threaded rod 470 away from the second connecting block; the second outer square nut 520 is used to abut against the side of the second pressure block 450 away from the second connecting block, so that the second pressure block 450 and the second connecting seat 430 clamp and fix the first screw rod 220 or the second screw rod 230; the first threaded rod 460 and the second threaded rod 470 share a common central axis.

[0058] Through the above technical solution, another embodiment of the fixing assembly is provided. When in use, the first screw rod 220 or the second screw rod 230 is clamped in the second gap 540, and then the second outer four-corner nut 520 is tightened to fix the first screw rod 220 or the second screw rod 230; then the second fixing rod 210 is embedded in the first gap 530, and the first outer four-corner nut 510 is tightened to fix one end of the second fixing rod 210, and the other end of the second fixing rod 210 is embedded in the first bone 110 or the second bone 140 to fix the first screw rod 220, the second screw rod 230, the first bone 110 and the second bone 140.

[0059] In addition, as attached Figure 1 As shown, the cable-based bone transport device further includes a first retaining member 180 (e.g., a U-shaped pin); one end of the cable 160 is connected to the first retaining member 180. The cable 160 is configured to pass through a cable hole 170 defined in the bone wall of the transported bone segment 120, extend into the intramedullary cavity 130 of the transported bone segment, then extend from the end of the transported bone segment 120 near the first connecting rod 240, enter the intramedullary cavity 150 of the second bone, and then pass through an exit hole 190 defined in the bone wall of the second bone 140 before extending from the limb and connecting to the moving component. The first retaining member 180 is configured to abut the outer wall of the transported bone segment 120. The cable hole 170 is located at the end of the transported bone segment 120 away from the second bone 140. The second retaining member 340 is larger than the inner diameter of the cable hole 170. This improves the stability of the connection between the cable 160 and the transported bone segment 120.

[0060] In addition, an eleventh through-hole (not shown) and a twelfth through-hole (not shown) are respectively provided at both ends of the intramedullary nail 820; the eleventh through-hole and the twelfth through-hole are used to insert a fixation nail (not shown). The intramedullary nail 820 maintains the coaxiality between the transported bone segment 120, the first bone 110, and the second bone 140, thereby preventing deviation of the transported bone segment 120 during movement.

[0061] Specifically, as attached Figure 1-2As shown, the transport assembly further includes a second connecting cross arm 350, a fifth nut 360, a sixth nut 370, a seventh nut 380 and an eighth nut 390; a fifth through hole and a sixth through hole are respectively provided at both ends of the second connecting cross arm 350; the first screw rod 220 is movably provided through the fifth through hole; the second screw rod 230 is movably provided through the sixth through hole; a seventh through hole 410 is provided in the middle of the second connecting cross arm 350; the cable 160 is movably provided through the seventh through hole 410; the fifth nut 360 and the sixth nut 370 are both screwed onto the first screw rod 220, The fifth nut 360 and the sixth nut 370 are respectively located on either side of the second connecting cross arm 350; the seventh nut 380 and the eighth nut 390 are both screwed onto the second screw rod 230 and are respectively located on either side of the second connecting cross arm 350; the fifth nut 360 and the seventh nut 380 are both used to abut the side of the second connecting cross arm 350 that is closer to the first connecting rod 240, and the sixth nut 370 and the eighth nut 390 are both used to abut the side of the second connecting cross arm 350 that is away from the first connecting rod 240. The provision of the second connecting cross arm 350 can further enhance the structural stability between the first screw rod 220 and the second screw rod 230.

[0062] In addition, as attached Figure 8 As shown, in another embodiment of a cable-based bone transport device proposed by the present invention, the above-mentioned moving parts also include a third connecting cross arm 740, a ninth nut 770, a tenth nut 780, an eleventh nut 790, a twelfth nut 810, a first outer gear ring 710, a second outer gear ring 720, a driving gear 730 and a rotating handle 760; an eighth through hole and a ninth through hole are respectively provided at both ends of the third connecting cross arm 740; the first screw rod 220 is movably provided in the eighth through hole; the second screw rod 230 is movably provided in the ninth through hole; the ninth nut 770 and the tenth nut 780 are both screwed in The first screw rod 220, and the ninth nut 770 and the tenth nut 780 are respectively located on both sides of the third connecting cross arm 740; the eleventh nut 790 and the twelfth nut 810 are both screwed on the second screw rod 230, and the eleventh nut 790 and the twelfth nut 810 are respectively located on both sides of the third connecting cross arm 740; the ninth nut 770 and the eleventh nut 790 are both used to abut the side of the third connecting cross arm 740 close to the first connecting rod 240; the tenth nut 780 and the twelfth nut 810 are both used to abut the side of the third connecting cross arm 740 away from the first connecting rod 240.

[0063] The first outer gear ring 710 is coaxially sleeved on the first nut 280; the second outer gear ring 720 is coaxially sleeved on the second nut 290; the driving gear 730 is rotatably set on the third connecting cross arm 740; the driving gear 730 is simultaneously engaged with the first outer gear ring 710 and the second outer gear ring 720; the turning handle 760 is coaxially connected to the driving gear 730; the third connecting cross arm 740 is located on the side of the first connecting cross arm 270 close to the first connecting rod 240; a tenth through hole 750 is opened in the middle of the third connecting cross arm 740; the cable 160 is movably passed through the tenth through hole 750.

[0064] The above technical solution can more conveniently drive the first connecting cross arm 270 to move. During use, it is only necessary to manually turn the handle 760 to drive the driving gear 730 to rotate, thereby driving the first outer gear ring 710 and the second outer gear ring 720 to rotate synchronously in the same direction, and then driving the first nut 280 and the second nut 290 to rotate and move synchronously, thereby driving the first connecting cross arm 270 to move in a direction away from the first connecting rod 240, thereby pulling the cable 160 to drive the bone segment 120 to be transported.

[0065] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention description and drawings under the inventive concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A cable-based bone transport device, characterized in that The present invention relates to a method for fixing a bone transporting member according to claim 1, wherein the fixing assembly is arranged on the transporting assembly; the fixing assembly is used to fix the transporting assembly to the first bone and the second bone respectively located at two ends of the transporting bone segment; the intramedullary nail is sequentially inserted into the intramedullary cavity of the first bone, the intramedullary cavity of the transporting bone segment, and the intramedullary cavity of the second bone; the movable member is movably connected to the transporting assembly; one end of the cable is used to connect the transporting bone segment, and the other end of the cable is used to pass through the intramedullary cavity of the transporting bone segment, the intramedullary cavity of the second bone, and then through the bone wall of the second bone, and then extend from the limb and connect to the movable member; the movable member can move along the longitudinal axis of the first screw rod in a direction close to the first bone, so as to drive the cable, and then drive the transporting bone segment to move along the axis of the intramedullary nail in a direction close to the second bone; The transport assembly further includes a first connecting rod; the two ends of the first connecting rod are respectively connected to the first screw rod and the second screw rod; the first connecting rod is close to the point where the cable extends from the limb; the other end of the cable extends from the limb, passes around the first connecting rod, and is connected to the moving component; The movable component includes a first nut, a second nut and a first connecting cross arm; the first nut is screwed together with the first screw rod; the second nut is screwed together with the second screw rod; the two ends of the first connecting cross arm are respectively provided with a first through hole and a second through hole; the first screw rod is movably passed through the first through hole; the second screw rod is movably passed through the second through hole; the other end of the cable is connected to the first connecting cross arm; the first nut and the second nut are both used to abut against the side of the first connecting cross arm close to the first connecting rod; the first nut and the second nut are both external hexagonal nuts; the first nut is formed with 6 outer walls; the 6 outer walls of the first nut are respectively provided with different numerical markings; the second nut is formed with 6 outer walls; the 6 outer walls of the second nut are respectively provided with different numerical markings; The movable component further includes a second retaining member; a third through hole is formed in the middle of the first connecting cross arm; the other end of the cable passes through the third through hole and is connected to the second retaining member; the second retaining member abuts against a side of the first connecting cross arm that is away from the first connecting rod; The fixing assembly includes a fixing plate, a buckling plate, a first fixing rod, and a second screw; the fixing plate is provided with a plurality of third threaded holes; the buckling plate is provided with a plurality of fourth threaded holes; the third threaded holes correspond to the fourth threaded holes in a one-to-one manner; the buckling plate is provided with a first arcuate groove and a second arcuate groove; the first arcuate groove extends in a direction parallel to the second arcuate groove; The buckle plate is buckled with the fixing plate, and the third threaded hole is directly opposite to the corresponding fourth threaded hole. The first screw rod passes through the first arc groove, and the second screw rod passes through the second arc groove. The second screw is screwed into the third threaded hole and the fourth threaded hole in sequence to fix the buckle plate to the fixing plate, and the buckle plate and the fixing plate clamp and fix the first screw rod and the second screw rod. The fixing plate is provided with a plurality of fifth threaded holes; one end of the first fixing rod is provided with a second external thread; the first fixing rod is screwed into the fifth threaded hole via the second external thread, and the other end of the first fixing rod is used to embed into the first bone or the second bone; the first fixing rod of at least one of the fixing assemblies is used to embed into the first bone, and the first fixing rod of at least one of the fixing assemblies is used to embed into the second bone; The movable part also includes a third connecting cross arm, a ninth nut, a tenth nut, an eleventh nut, a twelfth nut, a first outer gear ring, a second outer gear ring, a driving gear and a rotating handle; an eighth through hole and a ninth through hole are respectively provided at both ends of the third connecting cross arm; the first screw rod is movably inserted into the eighth through hole; the second screw rod is movably inserted into the ninth through hole; the ninth nut and the tenth nut are both screwed onto the first screw rod, and the ninth nut and the tenth nut are respectively located on both sides of the third connecting cross arm; the eleventh nut and the twelfth nut are both screwed onto the second screw rod, and the eleventh nut and the twelfth nut are respectively located on both sides of the third connecting cross arm; the ninth nut and the eleventh nut are both used to abut the side of the third connecting cross arm close to the first connecting rod; the tenth nut and the twelfth nut are both used to abut the side of the third connecting cross arm away from the first connecting rod; The first outer gear ring is coaxially sleeved on the first nut; the second outer gear ring is coaxially sleeved on the second nut; The driving gear is rotatably arranged on the third connecting cross arm; the driving gear is simultaneously engaged with the first outer gear ring and the second outer gear ring; the turning handle is coaxially connected to the driving gear; the third connecting cross arm is located on the side of the first connecting cross arm close to the first connecting rod; a tenth through hole is opened in the middle of the third connecting cross arm; the cable is movably passed through the tenth through hole.

2. A cable-based bone transport device according to claim 1, characterized in that: The carrying assembly also includes an L-shaped connecting sleeve and a second connecting rod; the L-shaped connecting sleeve is provided with a first threaded hole and a second threaded hole, and the central axis of the first threaded hole is at a preset angle to the central axis of the second threaded hole; the number of the L-shaped connecting sleeves is 2; one end of the first screw rod is fitted and passed through the first threaded hole of one of the L-shaped connecting sleeves, and one end of the second screw rod is fitted and passed through the first threaded hole of the other L-shaped connecting sleeve; the two ends of the second connecting rod are respectively embedded in the second threaded hole of one of the L-shaped connecting sleeves and the second threaded hole of the other L-shaped connecting sleeve, and the second connecting rod can rotate; the end of the second threaded hole away from the second connecting rod is screwed with a first screw; the second connecting rod is close to the point where the cable extends from the limb; the other end of the cable extends from the limb, bypasses the second connecting rod and is connected to the moving part.

3. A cable-based bone transport device according to claim 1, characterized in that: The moving part also includes a third nut and a fourth nut; the third nut is screwed on the first screw rod, and the first nut and the third nut are respectively located on both sides of the first connecting cross arm; the fourth nut is screwed on the second screw rod, and the second nut and the fourth nut are respectively located on both sides of the first connecting cross arm; the third nut and the fourth nut are both used to abut the side of the first connecting cross arm away from the first connecting rod.

4. A cable-based bone transport device according to claim 1, characterized in that: It also includes a first clamping piece; one end of the cable is connected to the first clamping piece, and the cable is used to pass through the cable hole opened in the bone wall of the transported bone segment, and extend into the intramedullary cavity of the transported bone segment, extend from the end of the transported bone segment close to the first connecting rod, and then enter the intramedullary cavity of the second bone, and then pass through the exit hole opened in the bone wall of the second bone, extend from the limb and connect to the moving component; the first clamping piece is used to abut the outer wall of the bone of the transported bone segment.

5. The cable-based bone transport device according to claim 1, characterized in that: An eleventh through hole and a twelfth through hole are respectively formed at both ends of the intramedullary nail; the eleventh through hole and the twelfth through hole are used for passing a fixing nail.

6. A cable-based bone transport device according to claim 1, characterized in that: The carrying assembly also includes a second connecting cross arm, a fifth nut, a sixth nut, a seventh nut and an eighth nut; a fifth through hole and a sixth through hole are respectively provided at both ends of the second connecting cross arm; the first screw rod is movably passed through the fifth through hole; the second screw rod is movably passed through the sixth through hole; a seventh through hole is provided in the middle of the second connecting cross arm; the cable is movably passed through the seventh through hole; the fifth nut and the sixth nut are both screwed on the first screw rod, and the fifth nut and the sixth nut are respectively located on both sides of the second connecting cross arm; the seventh nut and the eighth nut are both screwed on the second screw rod, and the seventh nut and the eighth nut are respectively located on both sides of the second connecting cross arm; the fifth nut and the seventh nut are both used to abut the side of the second connecting cross arm close to the first connecting rod, and the sixth nut and the eighth nut are both used to abut the side of the second connecting cross arm away from the first connecting rod.

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