Electromagnetic intramedullary nail bone carrying device

Abstract

The invention belongs to the technical field of medical instruments, and particularly relates to an electromagnetic intramedullary nail bone carrying device which comprises an intramedullary nail. The first electromagnet is fixedly mounted at the top end of the intramedullary nail; the second electromagnet is fixedly mounted at the bottom of the intramedullary nail; the permanent magnet is installed on the intramedullary nail in a sliding mode and fixedly connected with the sliding bone block, and the permanent magnet is located between the first electromagnet and the second electromagnet; the magnetic pole at the lower end of the first electromagnet is the same as that at the upper end of the permanent magnet; the magnetic pole at the upper end of the second electromagnet is the same as that at the lower end of the permanent magnet; the power supply mechanism is provided with a controller, the power supply mechanism is electrically connected with the first electromagnet and the second electromagnet, and the controller is used for controlling the magnitude of current supplied to the first electromagnet and the second electromagnet by the power supply mechanism. The invention aims to solve the problem that the control precision is reduced due to the structural defects of the existing bone carrying device.

Description

Technical Field

[0001] This invention belongs to the field of medical device technology, specifically relating to an electromagnetic intramedullary nail bone transport device. Background Technology

[0002] Currently, the most commonly used treatment for large-segment bone defects in the limbs is the Ilizarov framework. The Ilizarov framework requires inserting several steel pins into the metaphysis at both ends of the long bone and into the sliding bone fragments to provide stability and maintain limb length and force alignment. By performing low-energy osteotomy at the metaphysis of the bone defect, and then gradually adjusting the sliding bone fragments, the active bone segments are slid and brought closer to the bone defect stump at an appropriate speed and frequency, ultimately completing the bone defect repair.

[0003] However, in actual use, the Ilizarov stent requires manual adjustment of the position of the sliding bone blocks, which leads to a decrease in control precision.

[0004] There is a need to insert several steel pins into the metaphysis at both ends of long bones and into the gliding bone fragments. However, inserting multiple steel pins into multiple planes can cause bone cutting, weaken local bone strength, and easily lead to iatrogenic fractures. Summary of the Invention

[0005] The purpose of this invention is to provide an electromagnetic intramedullary nail bone transport device to solve the problem of reduced control accuracy caused by structural defects in existing bone transport devices.

[0006] To achieve the above-mentioned technical objectives, the technical solution adopted by the present invention is as follows:

[0007] An electromagnetic intramedullary nail transport device, comprising:

[0008] Intramedullary nail;

[0009] A first electromagnet is fixedly installed at the top of the intramedullary nail;

[0010] The second electromagnet is fixedly installed at the bottom of the intramedullary nail;

[0011] A permanent magnet is slidably mounted on the intramedullary nail and fixedly connected to the sliding bone block, and the permanent magnet is located between the first electromagnet and the second electromagnet;

[0012] The lower pole of the first electromagnet is the same as the upper pole of the permanent magnet, and the upper pole of the second electromagnet is the same as the lower pole of the permanent magnet.

[0013] A power supply mechanism with a controller is electrically connected to both a first electromagnet and a second electromagnet. The controller is used to control the magnitude of the current supplied by the power supply mechanism to the first electromagnet and the second electromagnet.

[0014] Further specifying, the intramedullary nail is hollow and has radially formed clearance grooves. The permanent magnet is slidably installed inside the intramedullary nail, and a second fixing nail, which is fixedly connected to the sliding bone block, passes through the clearance groove. The permanent magnet is connected to the second fixing nail. This structural design, by accommodating the permanent magnet through the hollow structure of the intramedullary nail, allows the permanent magnet to slide along the length of the intramedullary nail. The second fixing nail then completes the fixed connection between the permanent magnet and the sliding bone block, and the clearance groove avoids the second fixing nail. The structure is simple, easy to install, highly stable, and practical.

[0015] Further specified, the permanent magnet has a second through hole radially formed, and the second fixing pin passes through the second through hole. This structural design, through the interaction of the second fixing pin and the second through hole, allows for the connection between the permanent magnet and the second fixing pin, even when the horizontal movement of the permanent magnet is restricted by the hollow structure of the intramedullary nail. The structure is simple; during installation, simply align the second fixing pin with the second through hole and the clearance groove, then screw the second fixing pin into the sliding bone block to complete the fixed connection between the permanent magnet and the sliding bone block. Installation is convenient and highly practical.

[0016] Furthermore, the inner wall of the intramedullary nail is provided with an axially oriented sliding groove, and the outer wall of the permanent magnet is provided with an axially oriented sliding block, the sliding block being slidably installed within the sliding groove. This structural design, through the cooperation of the sliding groove and the sliding block, ensures that the second through hole is always aligned with the clearance groove, making it more convenient and practical to insert the second fixing nail into the second through hole.

[0017] Furthermore, the permanent magnet has a threaded blind hole at its upper end. This structural design, through the threaded blind hole, allows for the connection of a connecting rod inserted from the upper end of the intramedullary nail when the second fixing pin is screwed into the sliding bone block. The connecting rod then controls the height of the permanent magnet inside the intramedullary nail, enabling the second fixing pin to pass through the second through hole at a suitable position on the sliding bone block. This makes the connection between the sliding bone block and the permanent magnet more convenient and practical.

[0018] Further specifying, the intramedullary nail is hollow, with the first electromagnet inserted inside. The first electromagnet has a first through-hole radially formed, and the upper end of the intramedullary nail has a first mounting hole radially formed. A first fixing screw, which is fixedly connected to the end of the autologous bone, passes through the first mounting hole and is inserted into the first through-hole. This structural design, through the first fixing screw, achieves a fixed connection between the intramedullary nail and the end of the autologous bone. Simultaneously, the insertion of the first fixing screw into the first electromagnet, in conjunction with the insertion of the first electromagnet into the intramedullary nail, achieves a fixed connection between the first electromagnet and the intramedullary nail. The structure is simple; during installation, simply align the first fixing screw with the first through-hole and the first mounting hole, and then screw the first fixing screw into the end of the autologous bone. Installation is convenient. Furthermore, it also provides a channel for the permanent magnet and the second electromagnet to enter the interior of the intramedullary nail, making installation of the permanent magnet and the second electromagnet even more convenient.

[0019] Further specifying, the top wall of the intramedullary nail has an axially formed positioning groove, and the outer wall of the first electromagnet has an axially formed positioning block. The positioning block is located within the positioning groove, and the bottom wall of the positioning block abuts against the positioning groove. This structural design, through the cooperation of the positioning groove and the positioning block, limits the rotational freedom of the first electromagnet. At the same time, the positioning groove supports the positioning block, thus achieving vertical support for the first electromagnet, thereby aligning the first through hole and the first mounting hole. The structure is simple, and during installation, it is only necessary to place the first electromagnet inside the intramedullary nail so that the positioning block enters the positioning groove, making installation convenient.

[0020] Further specifying, the intramedullary nail is hollow, with the second electromagnet inserted inside. A third through-hole is radially formed on the second electromagnet, and a third mounting hole is radially formed at the lower end of the intramedullary nail. A third fixation screw, which is fixedly connected to the bone defect remnant, passes through the third mounting hole and is positioned within the third through-hole. This structural design, through the third fixation screw, achieves a fixed connection between the intramedullary nail and the bone defect remnant. Simultaneously, the insertion of the third fixation screw into the second electromagnet, in conjunction with the insertion of the second electromagnet into the intramedullary nail, achieves a fixed connection between the second electromagnet and the intramedullary nail. The structure is simple; during installation, simply align the third fixation screw with the third through-hole and the third mounting hole, and then screw the third fixation screw into the bone defect remnant. Installation is convenient.

[0021] Further specifying, the inner wall of the intramedullary nail has an axially formed sliding groove, and the outer wall of the second electromagnet has an axially formed limiting block. The limiting block is located within the sliding groove, and its bottom wall rests against the sliding groove. This structural design, through the interaction of the sliding groove and the limiting block, limits the rotational freedom of the second electromagnet. Simultaneously, the sliding groove supports the limiting block, providing vertical support for the second electromagnet, thereby aligning the third through hole and the third mounting hole. The structure is simple; during installation, simply place the second electromagnet inside the intramedullary nail, ensuring the limiting block enters the bottom of the sliding groove, making installation convenient.

[0022] Furthermore, the second electromagnet has a second wire connected to its side wall, and the second electromagnet is electrically connected to the power supply mechanism through the second wire. The inner wall of the intramedullary nail has an axially formed groove, and the second wire is located within the groove. This structural design, by accommodating the second wire connecting the second electromagnet and the power supply mechanism through the groove, avoids the presence of the second wire hindering the sliding of the permanent magnet within the intramedullary nail, while also facilitating the implantation of the intramedullary nail into the human bone, making it highly practical.

[0023] The invention employing the above technical solution has the following advantages:

[0024] 1. The controller controls the current supplied to the first and second electromagnets, thereby changing the repulsive force of the first and second electromagnets on the permanent magnet. The change in the position of the permanent magnet drives the sliding block to move, resulting in high control precision.

[0025] 2. By connecting the first, second, and third fixation nails to the corresponding bones, a mobile scaffold is formed in conjunction with the intramedullary nail. This eliminates the need to implant additional steel pins at the metaphysis of the long bones and on the slipped bone fragments, reducing the risk of nerve and blood vessel damage, nail tract infection, loosening, and soft tissue cutting.

[0026] 3. Using a centrally fixed intramedullary nail as a transport guide, compared with the Ilizarov external fixator, it can maintain a good bone alignment and avoid deviation of the alignment during bone transport, making it more practical. Attached Figure Description

[0027] The present invention can be further illustrated by the non-limiting embodiments given in the accompanying drawings;

[0028] Figure 1 This is a schematic diagram of an embodiment of an electromagnetic intramedullary nail bone transport device according to the present invention;

[0029] Figure 2 This is a cross-sectional structural schematic diagram of an embodiment of an electromagnetic intramedullary nail bone transport device according to the present invention;

[0030] Figure 3 for Figure 2 Enlarged structural diagram at point A;

[0031] Figure 4 This is a schematic diagram of the intramedullary nail portion in an embodiment of an electromagnetic intramedullary nail bone transport device of the present invention;

[0032] Figure 5 This is a schematic diagram of the structure of the first electromagnet part in an embodiment of an electromagnetic intramedullary nail bone transport device of the present invention;

[0033] Figure 6 This is a schematic diagram of the permanent magnet portion in an embodiment of an electromagnetic intramedullary nail transport device of the present invention;

[0034] Figure 7 This is a schematic diagram of the structure of the second electromagnet part in an embodiment of an electromagnetic intramedullary nail bone transport device of the present invention;

[0035] Figure 8 This is a schematic diagram of the structure of an electromagnetic intramedullary nail bone transport device according to an embodiment of the present invention. Figure 1 ;

[0036] Figure 9 This is a schematic diagram of the structure of an electromagnetic intramedullary nail bone transport device according to an embodiment of the present invention. Figure 2 ;

[0037] Figure 10 This is a schematic diagram of the structure of an electromagnetic intramedullary nail bone transport device according to an embodiment of the present invention. Figure 3 ;

[0038] The symbols for the main components are explained below:

[0039] 11. Autologous bone end; 12. Slipped bone fragment; 13. Bone defect stump.

[0040] Intramedullary nail 2, clearance groove 20, first fixing screw 21, first mounting hole 210, second fixing screw 22.

[0041] Third fixing pin 23, third mounting hole 230, sliding groove 24, positioning groove 25, wire groove 26.

[0042] First electromagnet 31, first through hole 310, positioning block 311, first wire 312

[0043] Permanent magnet 32, second through hole 320, sliding block 321, threaded blind hole 322

[0044] Second electromagnet 33, third through hole 330, limit block 331, second wire 332. Detailed Implementation

[0045] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that similar or identical parts are referred to by the same reference numerals in the drawings or description. Implementations not shown or described in the drawings are forms known to those skilled in the art. In addition, directional terms mentioned in the embodiments, such as "up," "down," "top," "bottom," "left," "right," "front," and "back," are only for reference to the directions in the drawings and are not intended to limit the scope of protection of the present invention.

[0046] like Figures 1-10 As shown, an electromagnetic intramedullary nail bone transport device of the present invention includes:

[0047] Intramedullary nail 2;

[0048] The first electromagnet 31 is fixedly installed at the top of the intramedullary nail 2;

[0049] The second electromagnet 33 is fixedly installed at the bottom of the intramedullary nail 2;

[0050] The permanent magnet 32 ​​is slidably mounted on the intramedullary nail 2 and fixedly connected to the sliding bone block 12. The permanent magnet 32 ​​is located between the first electromagnet 31 and the second electromagnet 33.

[0051] The lower pole of the first electromagnet 31 is the same as the upper pole of the permanent magnet 32, and the upper pole of the second electromagnet 33 is the same as the lower pole of the permanent magnet 32.

[0052] The power supply mechanism is equipped with a controller. The power supply mechanism is electrically connected to the first electromagnet 31 and the second electromagnet 33. The controller is used to control the magnitude of the current supplied by the power supply mechanism to the first electromagnet 31 and the second electromagnet 33.

[0053] like Figure 1 and Figure 4 As shown, the intramedullary nail 2 is hollow and has radially formed clearance grooves 20. A permanent magnet 32 ​​is slidably installed inside the intramedullary nail 2. A second fixing nail 22, which is fixedly connected to the sliding bone block 12, passes through the clearance groove 20. The permanent magnet 32 ​​is connected to the second fixing nail 22. In practice, depending on the actual situation, a ring-shaped permanent magnet 32 ​​can be fitted onto the intramedullary nail 2, and then bone cement can be used to achieve a fixed connection between the permanent magnet 32 ​​and the sliding bone block 12. In this embodiment, the hollow structure of the intramedullary nail 2 accommodates the permanent magnet 32, allowing it to slide along the length of the intramedullary nail 2. The second fixing nail 22 completes the fixed connection between the permanent magnet 32 ​​and the sliding bone block 12, and the clearance groove 20 avoids the second fixing nail 22. The structure is simple, easy to install, highly stable, and practical.

[0054] like Figure 1 and Figure 5 As shown, a second through hole 320 is radially formed on the permanent magnet 32, and a second fixing pin 22 passes through the second through hole 320. In practice, depending on the actual situation, a method such as radially formed threaded holes on the permanent magnet 32, with the second fixing pin 22 screwed into the threaded holes, can be used to complete the fixed connection between the permanent magnet 32 ​​and the sliding bone block 12. In this embodiment, the second fixing pin 22 and the second through hole 320 are mutually engaged. Even when the horizontal movement freedom of the permanent magnet 32 ​​is restricted by the hollow structure of the intramedullary nail 2, the connection between the permanent magnet 32 ​​and the second fixing pin 22 is achieved by the second fixing pin 22 passing through the second through hole 320. The structure is simple. During installation, simply align the second fixing pin 22 with the second through hole 320 and the clearance groove 20, and then screw the second fixing pin 22 into the sliding bone block 12 to complete the fixed connection between the permanent magnet 32 ​​and the sliding bone block 12. Installation is convenient and highly practical.

[0055] like Figures 1-4 As shown, the inner wall of the intramedullary nail 2 is provided with an axially oriented sliding groove 24, and the outer wall of the permanent magnet 32 ​​is provided with an axially oriented sliding block 321. The sliding block 321 is slidably installed in the sliding groove 24. In practice, depending on the actual situation, a protrusion can be provided on the inner wall of the intramedullary nail 2 and a groove can be provided on the outer wall of the permanent magnet 32 ​​to achieve mutual positioning between the intramedullary nail 2 and the permanent magnet 32. In this embodiment, the cooperation between the sliding groove 24 and the sliding block 321 ensures that the second through hole 320 is always aligned with the clearance groove 20, making it more convenient and practical to insert the second fixing nail 22 into the second through hole 320.

[0056] like Figure 2 and Figure 6 As shown, a threaded blind hole 322 is provided at the upper end of the permanent magnet 32. In practice, depending on the actual situation, after the first electromagnet 31 and the second electromagnet 33 are fixed to the intramedullary nail 2, the position of the permanent magnet 32 ​​can be adjusted by the pushing force of the first electromagnet 31 and the second electromagnet 33 on the permanent magnet 32. In this embodiment, by setting the threaded blind hole 322, when the second fixing nail 22 is screwed into the sliding bone block 12, a connecting rod inserted from the upper end of the intramedullary nail 2 can be connected through the threaded blind hole 322. The connecting rod can then control the height of the permanent magnet 32 ​​inside the intramedullary nail 2, thereby allowing the second fixing nail 22 to pass through the second through hole 320 at a suitable position on the sliding bone block 12. The connection between the sliding bone block 12 and the permanent magnet 32 ​​is more convenient and has strong practicality.

[0057] like Figures 1-5As shown, the intramedullary nail 2 is hollow, and the first electromagnet 31 is inserted inside the intramedullary nail 2. The first electromagnet 31 has a first through hole 310 radially opened on it. The upper end of the intramedullary nail 2 has a first mounting hole 210 radially opened. The first fixing nail 21, which is fixedly connected to the autologous bone end 11, is inserted into the first mounting hole 210. The first fixing nail 21 is inserted into the first through hole 310. In practice, depending on the actual situation, the first electromagnet 31 can be directly screwed axially to the top of the intramedullary nail 2 to achieve a fixed connection between the first electromagnet 31 and the intramedullary nail 2. In this embodiment, the first fixing nail 21 completes the fixed connection between the intramedullary nail 2 and the autologous bone end 11. At the same time, the first fixing nail 21 passes through the first electromagnet 31, and the first electromagnet 31 passes through the intramedullary nail 2 to achieve a fixed connection between the first electromagnet 31 and the intramedullary nail 2. The structure is simple. During installation, it is only necessary to align the first fixing nail 21 with the first through hole 310 and the first mounting hole 210, and then screw the first fixing nail 21 into the autologous bone end 11. The installation is convenient. At the same time, a channel can be reserved for the permanent magnet 32 ​​and the second electromagnet 33 to enter the interior of the intramedullary nail 2, making it more convenient to install the permanent magnet 32 ​​and the second electromagnet 33.

[0058] like Figure 4 As shown, the top wall of the intramedullary nail 2 has an axially oriented positioning groove 25, and the outer wall of the first electromagnet 31 has an axially oriented positioning block 311. The positioning block 311 is located inside the positioning groove 25, and its bottom wall rests against the positioning groove 25. In practice, depending on the actual situation, threaded holes can be opened on the side wall of the intramedullary nail 2, and positioning blocks can be opened on the side wall of the first electromagnet 31. Positioning bolts are screwed into the threaded holes, and the positioning bolts rest against the positioning blocks to achieve a fixed connection between the intramedullary nail 2 and the first electromagnet 31. In this embodiment, the rotational freedom of the first electromagnet 31 is limited by the cooperation of the positioning groove 25 and the positioning block 311. At the same time, the positioning groove 25 supports the positioning block 311, thereby achieving vertical support for the first electromagnet 31, and thus achieving alignment between the first through hole 310 and the first mounting hole 210. The structure is simple, and during installation, it is only necessary to place the first electromagnet 31 inside the intramedullary nail 2 so that the positioning block 311 enters the positioning groove 25, making installation convenient.

[0059] like Figure 7As shown, the intramedullary nail 2 is hollow, and the second electromagnet 33 is inserted inside the intramedullary nail 2. The second electromagnet 33 has a third through hole 330 radially opened on it. The lower end of the intramedullary nail 2 has a third mounting hole 230 radially opened. A third fixation nail 23, which is fixedly connected to the bone defect stump 13, is inserted inside the third mounting hole 230. The third fixation nail 23 is inserted inside the third through hole 330. In practice, depending on the actual situation, the second electromagnet 33 can also be directly screwed axially to the bottom of the intramedullary nail 2 to achieve a fixed connection between the second electromagnet 33 and the intramedullary nail 2. In this embodiment, the third fixing nail 23 is used to complete the fixed connection between the intramedullary nail 2 and the bone defect stump 13. At the same time, the second electromagnet 33 is inserted through the third fixing nail 23, and the second electromagnet 33 is inserted through the intramedullary nail 2 to achieve a fixed connection between the second electromagnet 33 and the intramedullary nail 2. The structure is simple. During installation, it is only necessary to align the third fixing nail 23 with the third through hole 330 and the third mounting hole 230, and then screw the third fixing nail 23 into the bone defect stump 13. The installation is convenient.

[0060] like Figure 3 and Figure 4 As shown, the inner wall of the intramedullary nail 2 is provided with a sliding groove 24 in the axial direction, and the outer wall of the second electromagnet 33 is provided with a limiting block 331 in the axial direction. The limiting block 331 is located in the sliding groove 24, and the bottom wall of the limiting block 331 abuts against the sliding groove 24. In practice, depending on the actual situation, a threaded hole can be opened on the side wall of the intramedullary nail 2, and a positioning block can be opened on the side wall of the second electromagnet 33. A positioning bolt can be screwed into the threaded hole, and the positioning bolt can be pressed against the positioning block to achieve a fixed connection between the intramedullary nail 2 and the second electromagnet 33. In this embodiment, the rotational freedom of the second electromagnet 33 is limited by the cooperation between the sliding groove 24 and the limiting block 331. At the same time, the sliding groove 24 supports the limiting block 331, thereby achieving vertical support for the second electromagnet 33, and thus achieving alignment between the third through hole 330 and the third mounting hole 230. The structure is simple. During installation, the second electromagnet 33 is simply placed inside the intramedullary nail 2, so that the limiting block 331 enters the bottom of the sliding groove 24. Installation is convenient.

[0061] like Figures 1-3 and Figure 5As shown, a first wire 312 is connected to the first electromagnet 31, and the first electromagnet 31 is electrically connected to the power supply mechanism through the first wire 312. The first wire 312 is located in the hollow cavity of the intramedullary nail 2. In practice, depending on the actual situation, the first wire 312 can also be set on the side wall of the first electromagnet 31 and then placed in the sliding groove 24. In this embodiment, the first wire 312 connecting the first electromagnet 31 and the power supply mechanism is directly accommodated through the hollow cavity of the intramedullary nail 2. Since the sliding position of the permanent magnet 32 ​​is between the first electromagnet 31 and the second electromagnet 33, it will not pass above the first electromagnet 31, so there is no need to worry that the first wire 312 will hinder the movement of the permanent magnet 32.

[0062] like Figures 1-3 and Figure 7 As shown, a second conductor 332 is connected to the side wall of the second electromagnet 33. The second electromagnet 33 is electrically connected to the power supply mechanism through the second conductor 332. A groove 26 is axially formed on the inner wall of the intramedullary nail 2, and the second conductor 332 is located in the groove 26. In practice, depending on the actual situation, an axial groove can also be formed on the outer wall of the intramedullary nail 2, and the second conductor 332 can be placed in the axial groove to achieve the electrical connection between the second electromagnet 33 and the power supply mechanism. In this embodiment, the second conductor 332 connecting the second electromagnet 33 and the power supply mechanism is accommodated by the groove 26, which avoids the presence of the second conductor 332 from hindering the sliding of the permanent magnet 32 ​​in the intramedullary nail 2, and at the same time facilitates the implantation of the intramedullary nail 2 into the human bone, making it highly practical.

[0063] In this embodiment, during the operation, a second electromagnet 33 is placed inside the intramedullary nail 2, so that the limiting block 331 of the second electromagnet 33 enters the bottom of the intramedullary nail 2 along the sliding groove 24, and the second wire 332 is located in the wire groove 26. Then, the intramedullary nail 2 is implanted into the bone. After that, the third fixing nail 23 is aligned with the third through hole 330 and the third mounting hole 230 and screwed into the bone defect stump 13 to complete the fixed connection between the bone defect stump 13, the second electromagnet 33 and the intramedullary nail 2.

[0064] Then, by connecting the connecting rod to the threaded blind hole 322, the permanent magnet 32 ​​is inserted from the top of the intramedullary nail 2, so that the sliding block 321 is located in the sliding groove 24. After the permanent magnet 32 ​​is placed in the appropriate position, the second fixing pin 22 is aligned with the clearance groove 20 and the second through hole 320, and the second fixing pin 22 is screwed into the sliding bone block 12 to complete the fixed connection between the sliding bone block 12 and the permanent magnet 32.

[0065] After completing the fixed connection between the sliding bone block 12 and the permanent magnet 32, rotate the connecting rod to detach it from the permanent magnet 32. Then, place the first electromagnet 31 on the upper end of the intramedullary nail 2 so that the positioning block 311 passes through the positioning groove 25 and the positioning groove 25 forms a support for the first electromagnet 31. After that, align the first fixing nail 21 with the first through hole 310 and the first mounting hole 210 and screw it into the autologous bone end 11 to complete the fixed connection between the autologous bone end 11, the first electromagnet 31 and the intramedullary nail 2.

[0066] The first electromagnet 31 and the second electromagnet 33 are electrically connected to the power supply mechanism through the first wire 312 and the second wire 332, respectively.

[0067] When the sliding bone block 12 needs to move toward the bone defect residual end 13, the controller increases the current supplied to the first electromagnet 31 by the power supply mechanism, so that the repulsive force of the first electromagnet 31 on the permanent magnet 32 ​​increases, while the current supplied to the second electromagnet 32 ​​decreases, so that the repulsive force of the second electromagnet 33 on the permanent magnet 32 ​​decreases. Thus, the permanent magnet 32 ​​can be used to drive the sliding bone block 12 away from the autologous bone end 11 toward the bone defect residual end 13.

[0068] Under the action of the first electromagnet 31, the permanent magnet 32, and the second electromagnet 33, the sliding bone block 12 is ensured to move toward the bone defect remnant 13 until the sliding bone block 12 contacts the bone defect remnant 13. The sliding bone block 12 moves toward the bone defect remnant 13 at a speed of 1 mm / day, and the autologous bone end 11 will regenerate 1 mm of bone every day.

[0069] The above provides a detailed description of the electromagnetic intramedullary nail bone transport device provided by the present invention. The specific embodiments are described only to aid in understanding the method and core ideas of the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from its principles, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. An electromagnetic intramedullary nail bone transport device, comprising: include: Intramedullary nail (2); The first electromagnet (31) is fixedly installed at the top of the intramedullary nail (2); The second electromagnet (33) is fixedly installed at the bottom of the intramedullary nail (2); A permanent magnet (32) is slidably mounted on the intramedullary nail (2) and fixedly connected to the sliding bone block (12). The permanent magnet (32) is located between the first electromagnet (31) and the second electromagnet (33). The magnetic pole at the lower end of the first electromagnet (31) is the same as the magnetic pole at the upper end of the permanent magnet (32), and the magnetic pole at the upper end of the second electromagnet (33) is the same as the magnetic pole at the lower end of the permanent magnet (32). A power supply mechanism with a controller is electrically connected to the first electromagnet (31) and the second electromagnet (33). The controller is used to control the magnitude of the current supplied by the power supply mechanism to the first electromagnet (31) and the second electromagnet (33).

2. The electromagnetic intramedullary nail transport device according to claim 1, characterized in that: The intramedullary nail (2) is hollow and has a radial clearance groove (20). The permanent magnet (32) is slidably installed inside the intramedullary nail (2). A second fixation nail (22) that is fixedly connected to the sliding bone block (12) is inserted in the clearance groove (20). The permanent magnet (32) is connected to the second fixation nail (22).

3. The electromagnetic intramedullary nail transport device according to claim 2, characterized in that: The permanent magnet (32) has a second through hole (320) radially formed, and the second fixing nail (22) passes through the second through hole (320).

4. The electromagnetic intramedullary nail transport device according to claim 3, characterized in that: The inner wall of the intramedullary nail (2) is provided with a sliding groove (24) axially, and the outer wall of the permanent magnet (32) is provided with a sliding block (321) axially, and the sliding block (321) is slidably installed in the sliding groove (24).

5. The electromagnetic intramedullary nail transport device according to claim 4, characterized in that: The permanent magnet (32) has a threaded blind hole (322) at its upper end.

6. The electromagnetic intramedullary nail transport device according to claim 1, characterized in that: The intramedullary nail (2) is hollow. The first electromagnet (31) is inserted inside the intramedullary nail (2). The first electromagnet (31) has a first through hole (310) radially opened. The upper end of the intramedullary nail (2) has a first mounting hole (210) radially opened. The first mounting hole (210) is inserted into the first fixing nail (21) which is fixedly connected to the autologous bone end (11). The first fixing nail (21) is inserted into the first through hole (310).

7. The electromagnetic intramedullary nail transport device according to claim 6, characterized in that: The top wall of the intramedullary nail (2) is provided with a positioning groove (25) axially, and the outer wall of the first electromagnet (31) is provided with a positioning block (311) axially. The positioning block (311) is located in the positioning groove (25), and the bottom wall of the positioning block (311) rests against the positioning groove (25).

8. The electromagnetic intramedullary nail transport device according to claim 1, characterized in that: The intramedullary nail (2) is hollow. The second electromagnet (33) is inserted inside the intramedullary nail (2). The second electromagnet (33) has a third through hole (330) radially opened on it. The lower end of the intramedullary nail (2) has a third mounting hole (230) radially opened. A third fixation nail (23) for fixing and connecting with the bone defect stump (13) is inserted inside the third mounting hole (230). The third fixation nail (23) is inserted inside the third through hole (330).

9. The electromagnetic intramedullary nail transport device according to claim 8, characterized in that: The inner wall of the intramedullary nail (2) is provided with a sliding groove (24) in the axial direction, and the outer wall of the second electromagnet (33) is provided with a limiting block (331) in the axial direction. The limiting block (331) is located in the sliding groove (24), and the bottom wall of the limiting block (331) rests against the sliding groove (24).

10. An electromagnetic intramedullary nail transport device according to claim 8, characterized in that: The second electromagnet (33) has a second wire (332) connected to its side wall. The second electromagnet (33) is electrically connected to the power supply mechanism through the second wire (332). The inner wall of the intramedullary nail (2) has an axial groove (26) and the second wire (332) is located in the groove (26).

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