Flexible in-vivo bone moving device

Abstract

The invention relates to the technical field of medical instruments, in particular to a flexible in-vivo bone moving device which comprises a first fixing block and a second fixing block which are fixedly connected to an in-vivo bone, and a moving block used for moving the bone is arranged between the first fixing block and the second fixing block; the first fixing block is detachably connected with a driving rod and a second driven rod, the second fixing block is detachably connected with a first driven rod, the driving rod, the first driven rod and the second driven rod are all provided with wire rollers, and meshing teeth are further fixedly connected to the positions, corresponding to the driving rod and the second driven rod, of the wire rollers; a first steel rope and a second steel rope are connected between the adjacent wire rollers, a clamping mechanism used for clamping the first steel rope and the second steel rope is arranged on the moving block, and a rotating mechanism used for driving the driving rod to rotate is arranged in the driving rod. The fixing device is used for improving the applicability and accuracy in the moving process, and is convenient to disassemble after moving is completed so as to reduce discomfort of a patient when the fixing device is fixed and worn.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly relates to a flexible in-vivo bone transporter. Background Art

[0002] Bone transport, as an effective treatment method for large segment bone defects, is widely used in clinical practice. Currently, the bone transport technology used in clinical treatment of bone defects mainly uses an external fixator for external transport. The principle is to use the movable device of the external fixator to transport in a predetermined direction and frequency. According to the tension-stress principle, it can stimulate the regeneration of bone tissue, thereby repairing bone defects.

[0003] Traditional bone transport methods, because they use external fixators, often accompany complications such as discomfort during wearing, skin cutting, and pin tract infections. During the transport process, the continuous traction of muscles and soft tissues by the pin tracts will cause complications such as joint stiffness and persistent pain. Moreover, the external fixator index is usually greater than 50 d / 1 cm, and patients will face dilemmas such as long-term pain and difficulty in home care.

[0004] Another example is the implantable length-ening nail, which is placed in the body and the intramedullary nail is extended through an internal device, which can completely eliminate the disadvantages of discomfort during wearing of external fixation, pin tract infections, penetration of muscles, and skin cutting. However, due to severe pain after patients use it, rapid extension, authorization for use, etc., it cannot be safely and widely used in clinical practice. Therefore, aiming at the operation difficulties and usage defects of traditional bone transport methods, the present invention provides a flexible in-vivo transporter to reduce the problem of deviation of the axis of the transported bone block caused by rigid fixation, and at the same time facilitate disassembly and removal after transport, reducing the symptoms of discomfort during fixation wearing. Summary of the Invention

[0005] To solve the above problems, the present invention provides a flexible in-vivo bone transporter, which is used to improve the applicability and accuracy during the transport process and reduce the discomfort of patients during fixation wearing.

[0006] To achieve the above object, the technical solution of the present invention is as follows: A flexible in-vivo bone transporter includes a first fixing block and a second fixing block fixedly connected to the in-vivo bone, and a moving block for transporting the bone is arranged between the first fixing block and the second fixing block;

[0007] An active rod and a second driven rod are detachably connected to the first fixing block, a first driven rod is detachably connected to the second fixing block, wire rollers are arranged on the active rod, the first driven rod and the second driven rod, and meshing teeth are also fixedly connected to the corresponding wire rollers on the first fixing block;

[0008] A first steel rope and a second steel rope are connected between adjacent wire rollers. A clamping mechanism for clamping the first steel rope and the second steel rope is provided on the moving block, and a rotating mechanism for driving the active rod to rotate is provided inside the active rod.

[0009] Furthermore, the clamping mechanism includes a clamping piece and a clamping groove. The clamping groove is opened on the moving block, and the clamping piece is located above the clamping groove;

[0010] A fixing groove is also opened on the clamping piece. The fixing groove is located above the clamping groove, and the clamping piece is slidably matched with the fixing groove. The first steel rope and the second steel rope are located between the clamping piece and the clamping groove.

[0011] Furthermore, the rotating mechanism includes a driving rod slidably matched with the active rod. The driving rod is fixedly connected to the wire roller; A rotating rod is rotatably matched inside the driving rod. A plurality of tapered pushing blocks are fixedly connected to the top and bottom of the rotating rod. The pushing blocks are circumferentially arranged around the rotating rod; One end of the rotating rod is located inside the driving rod, and a spring is provided between the rotating rod and the driving rod. A pressure rod is sleeved on the other end of the rotating rod;

[0012] A plurality of first pushing grooves corresponding to the pushing blocks are opened at the bottom of the pressure rod. A matching block is fixedly connected to the top of the active rod. The pressure rod is slidably matched with the matching block; A plurality of circumferentially arranged limiting blocks are fixedly connected to the outer wall of the pressure rod. A plurality of circumferentially arranged second pushing grooves are opened on the inner wall of the matching block. The second pushing grooves correspond to the limiting blocks.

[0013] Furthermore, an observation window is opened on the active rod, and a plurality of digital grooves are fixedly connected to the outer wall of the driving rod.

[0014] Furthermore, a wire groove for clamping the first steel rope and the second steel rope is opened on the wire roller. The wire groove is located above the meshing teeth.

[0015] A plurality of arc-shaped blocks are fixedly connected inside the wire groove.

[0016] Furthermore, cover plates for shielding the wire roller are threadedly connected above the first fixing block and the second fixing block respectively.

[0017] Adopting the above scheme has the following beneficial effects:

[0018] 1. In this scheme, the bones are respectively fixed and moved by the separated first fixing block, moving block and second fixing block, and then the first steel rope and the second steel rope are used for flexible connection. Compared with the connection with the fixed bracket, the flexible connection can better adapt to the need of clamping and fixing the arcs of bones of different human bodies, meet the clamping and moving of different human bodies, so as to improve the applicability in the process of bone transportation.

[0019] 2. In this scheme, the controllable adjustment and rotation are carried out through the rotating mechanism to ensure the controllability of the moving block during the process of transporting the bones, so as to improve the accurate regulation during the transportation process and protect the safety of the patients.

[0020] 3. In this solution, the detachable active rod, the first driven rod, and the second driven rod are detachably connected to the first fixing block and the second fixing block, which facilitates disassembly after the bone transport is stabilized, so as to remove the device after the transport, reducing the discomfort symptoms caused by fixed wearing.

[0021] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present invention. Description of the Drawings

[0022] Figure 1 Isometric view of an embodiment of the flexible in-vivo bone transporter of the present invention;

[0023] Figure 2 Front view of an embodiment of the flexible in-vivo bone transporter of the present invention;

[0024] Figure 3 Is Figure 2 Schematic cross-sectional view taken along the A-A direction in

[0025] Figure 4 Is Figure 1 Connection schematic diagram of the drive rod in

[0026] Figure 5 Is Figure 4 Isometric view of the drive rod in

[0027] Figure 6 Is Figure 1 Isometric view of the active rod in

[0028] Figure 7 Is Figure 4 Isometric view of the transfer rod in

[0029] Reference numerals in the drawings of the specification include: 1, first fixing block; 11, active rod; 111, observation window; 112, mating block; 113, pressure rod; 12, drive rod; 13, card slot; 2, second fixing block; 21, first driven rod; 22, second driven rod; 3, moving block; 31, engaging piece; 32, engaging groove; 4, wire roller; 41, wire groove; 42, meshing teeth; 5, first steel wire rope; 51, second steel wire rope; 6, rotating rod; 61, pushing block; 62, first pushing groove; 63, second pushing groove; 64, limiting block; 65, limiting groove. Detailed Embodiments

[0030] The technical solutions of the present invention will be clearly and completely described below with reference to the drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0031] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0032] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] The following is a further detailed description through specific embodiments:

[0034] As shown in the Figures 1 to 7 accompanying drawings: A flexible in-vivo bone transporter includes a first fixing block 1 and a second fixing block 2 for fixedly connecting bones in the body. A moving block 3 for moving the bones is provided between the first fixing block 1 and the second fixing block 2; an active rod 11 and a second driven rod 22 are detachably connected to the first fixing block 1, and a first driven rod 21 is detachably connected to the second fixing block 2. Thread rollers 4 are provided on the active rod 11, the first driven rod 21, and the second driven rod 22. A meshing tooth 42 is also fixedly connected to the corresponding thread roller 4 on the first fixing block 1.

[0035] Cover plates for shielding the thread rollers 4 are threadedly connected above both the first fixing block 1 and the second fixing block 2. A first steel wire rope 5 and a second steel wire rope 51 are connected between adjacent thread rollers 4. Thread grooves 41 for engaging the first steel wire rope 5 and the second steel wire rope 51 are formed in the thread rollers 4. The thread grooves 41 are located above the meshing teeth 42, and a number of arc-shaped blocks are fixedly connected in the thread grooves 41. A clamping mechanism for engaging the first steel wire rope 5 and the second steel wire rope 51 is provided on the moving block 3, and a rotating mechanism for driving the active rod 11 to rotate is provided inside the active rod 11.

[0036] Among them, the engaging mechanism includes an engaging piece 31 and an engaging groove 32. The engaging groove 32 is formed in the moving block 3, and the engaging piece 31 is located above the engaging groove 32. A fixing groove is also formed in the engaging piece 31. The fixing groove is located above the engaging groove 32, and the engaging piece 31 is slidably engaged with the fixing groove. The first steel wire rope 5 and the second steel wire rope 51 are located between the engaging piece 31 and the engaging groove 32.

[0037] The rotating mechanism includes a driving rod 12 that is slidably engaged with the driving rod 11. The driving rod 12 is fixedly connected to the wire roller 4. An observation window 111 is formed in the driving rod 11, and a plurality of digital grooves are fixedly connected to the outer wall of the driving rod 12. A rotating rod 6 is rotatably engaged in the driving rod 12. A plurality of tapered pushing blocks 61 are fixedly connected to the top and bottom of the rotating rod 6. The pushing blocks 61 are circumferentially arranged around the rotating rod 6. One end of the rotating rod 6 is located in the driving rod 12, and a spring (not shown in the figure) is provided between the rotating rod 6 and the driving rod 12. The other end of the rotating rod 6 is sleeved with a pressing rod 113. A plurality of first pushing grooves 62 corresponding to the pushing blocks 61 are formed at the bottom of the pressing rod 113. A matching block 112 is fixedly connected to the top of the driving rod 11. The pressing rod 113 is slidably engaged with the matching block 112. A plurality of circumferentially arranged limiting blocks 64 are fixedly connected to the outer wall of the pressing rod 113. A plurality of circumferentially arranged second pushing grooves 63 are formed in the inner wall of the matching block 112. The second pushing grooves 63 correspond to the limiting blocks 64.

[0038] The specific implementation process is as follows: First, the doctor installs the first fixing block 11 and the second fixing block 22 on both sides of the bone that needs to be bone transported. When installing the moving block 33 and fixing it to the bone block that needs to be attached, make the first fixing block 11, the second fixing block 22, and the moving block 33 be in the same straight line. Use the first steel wire rope 55 and the second steel wire rope 51 to flexibly connect the first fixing block 11, the second fixing block 22, and the moving block 33. Compared with connecting to the fixing bracket, the flexible connection can better adapt to the need for clamping and fixing the arc of bones of different human bodies, meet the bone clamping and transportation of different human bodies, and improve the applicability during the bone transportation process.

[0039] During the bone transportation process, the doctor presses the pressing rod 113. The limiting block 64 on the pressing rod 113 is limited by the second pushing groove 63, so that the pressing rod 113 can push the rotating rod 6 to move horizontally up and down, so as to facilitate the pushing blocks 61 on both sides of the pressing rod 113 to contact the first pushing groove 62 and the second pushing groove 63 respectively. When the first pushing groove 62 on the pressing rod 113 contacts the pushing block 61 on the rotating rod 6, the pushing rod on the rotating rod 6 rotates along the inclined surface of the first pushing groove 62 until it slides to the deepest part of the first pushing groove 62 to form an engagement and keep the drill rod and the pressing rod 113 stationary, so that the pressing rod 113 pushes the rotating rod 6 to continue to move downward against the internal spring.

[0040] When the pushing block 61 on the other side of the drill pipe away from the pressure rod 113 contacts the second pushing groove 63 inside the driving rod 12, at this time, the limiting block 64 on the pressure rod 113 is no longer restricted by the limiting groove 65, so that the rotating rod 6 and the pressure rod 113 can rotate through the meshing force between the pushing block 61 and the second pushing groove 63. The driving rod 12 drives the meshing teeth 42 and the wire roller 4 to rotate. The first steel wire rope 5 is driven to rotate clockwise by the wire roller 4, and the second steel wire rope 51 is driven to rotate counterclockwise by the meshing teeth 42. By adjusting the fixing situation of the clamping plate on the moving block 3 to the first steel wire rope 5 or the second steel wire rope 51, the moving block 3 is driven to move horizontally or rotate to realize the bone distraction. When the pushing rod on the rotating rod 6 continues to move downward and enters the adjacent second pushing groove 63, the driving rod 12 is fixed to remain stationary to maintain the accuracy of the bone distraction.

[0041] When the doctor releases the pressure on the pressure rod 113, the elastic force of the spring quickly pushes the rotating rod 6 and the pressure rod 113 to move upward, quickly pass through the gap between the second pushing groove 63 and the second pushing groove 63, so as to keep the position of the driving rod 12 unchanged. At the same time, the movement of the first steel wire rope 5 is confirmed by the digital groove on the driving rod 12 to facilitate the bone distraction.

[0042] Obviously, the above embodiments are only examples given for clear illustration and not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. And the obvious changes or variations derived therefrom are still within the protection scope of the present invention.

Claims

1. A flexible in vivo bone mover, characterized in that: It comprises a first fixing block (1) and a second fixing block (2) for fixing and connecting bones in a body, and a moving block (3) for moving bones is arranged between the first fixing block (1) and the second fixing block (2); An active rod (11) and a second driven rod (22) are detachably connected to the first fixed block (1), and the first driven rod (21) is detachably connected to the second fixed block (2); a line roller (4) is provided on the active rod (11), the first driven rod (21) and the second driven rod (22); and meshing teeth (42) are also fixedly connected to the corresponding line roller (4) on the first fixed block (1); A first steel rope (5) and a second steel rope (51) are connected between adjacent line rollers (4); a clamping mechanism for clamping the first steel rope (5) and the second steel rope (51) is provided on the moving block (3); and a rotating mechanism for driving the active rod (11) to rotate is provided inside the active rod (11).

2. The flexible intracorporeal bone mover according to claim 1, characterized in that: The engaging mechanism comprises an engaging piece (31) and an engaging groove (32), wherein the engaging groove (32) is provided on the moving block (3), and the engaging piece (31) is located above the engaging groove (32); The locking piece (31) is also provided with a fixing groove, which is located above the locking groove (32). The locking piece (31) and the fixing groove are slidably matched, and the first steel rope (5) and the second steel rope (51) are located between the locking piece (31) and the locking groove (32).

3. The flexible intracorporeal bone mover according to claim 2, characterized in that: The rotating mechanism comprises a driving rod (12) slidably matched with the active rod (11), the driving rod (12) being fixedly connected to the line roller (4); a rotating rod (6) is rotatably matched inside the driving rod (12), a plurality of conical pushing blocks (61) are fixedly connected to the top and bottom of the rotating rod (6), and the pushing blocks (61) and the rotating rod (6) are arranged in a central circumferential direction; one end of the rotating rod (6) is located inside the driving rod (12), a spring is provided between the rotating rod (6) and the driving rod (12), and a pressure rod (113) is sleeved on the other end of the rotating rod (6); The bottom of the pressure rod (113) is provided with a plurality of first pushing grooves (62) corresponding to the pushing block (61); the top of the active rod (11) is fixedly connected with a matching block (112); the pressure rod (113) and the matching block (112) are slidably matched; the outer wall of the pressure rod (113) is fixedly connected with a plurality of circumferentially arranged limiting blocks (64); the inner wall of the matching block (112) is provided with a plurality of circumferentially arranged second pushing grooves (63); the second pushing grooves (63) correspond to the limiting blocks (64).

4. The flexible intracorporeal bone mover according to claim 3, characterized in that: An observation window (111) is provided on the active rod (11), and a plurality of digital slots are fixedly connected on the outer wall of the driving rod (12).

5. The flexible intracorporeal bone mover according to claim 4, characterized in that: The wire roller (4) is provided with a wire groove (41) for engaging the first steel rope (5) and the second steel rope (51), and the wire groove (41) is located above the meshing teeth (42).

6. The flexible intracorporeal bone mover according to claim 5, characterized in that: A plurality of arc-shaped blocks are fixedly connected in the wire groove (41).

7. The flexible intracorporeal bone mover according to claim 6, characterized in that: Cover plates for shielding the wire roller (4) are threadedly connected above the first fixing block (1) and the second fixing block (2).

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