Intramedullary bone transport device

Abstract

The utility model relates to medical instrument technical field provides a marrow bone carrying device, marrow bone includes the proximal end bone piece, carrying bone piece and distal end bone piece that arrange in proper order, the carrying device includes: first fixed part, set up in the proximal end bone piece, second fixed part, one side of second fixed part set up in distal end bone piece, the other side of second fixed part is connected with first fixed part, carries the nail, sets up in carrying bone piece, wherein, the guide rail is formed on second fixed part, and carrying nail carries carrying bone piece along the guide rail, the utility model discloses first fixed part, second fixed part and carrying nail are fixed in proximal end bone piece, distal end bone piece and carrying bone piece respectively, and the stability of bone carrying process is improved that firm and form the path of bone carrying, carry the bone through carrying nail and move along the guide rail, can effectively resist external force, prevent bone shift rotation etc.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to an intramedullary bone transport device. Background Technology

[0002] Bone defects are complex pathological changes caused by various factors such as trauma, infection, tumors, and congenital diseases. The location of the defect, the condition of surrounding soft tissues, and the patient's overall health all significantly influence disease progression and treatment outcomes. Clinically, surgical options for bone defects mainly include bone grafting and bone transport. Bone transport is an orthopedic technique that uses traction on bone segments to utilize the body's own bone regeneration capabilities to repair large bone defects or deformities. Its core principle is to gradually move healthy bone segments, stimulating callus formation in the defect area, and gradually mineralizing the callus within the traction gaps, ultimately achieving bone regeneration.

[0003] Currently, the primary method for bone transport in China for bone defects is external fixation. The current status and problems of external fixation bone transport include: severe soft tissue damage, poor comfort, long treatment cycle (repeated surgeries), aesthetic impact, susceptibility to infection, high complication rate, and complex operation. Internationally, research on intramedullary lengthening nail technology began relatively early, and one type of product is already in clinical use. Compared with traditional external fixation lengthening techniques, it has certain advantages in terms of complication rate, bone healing, and postoperative functional rehabilitation. However, these devices are still under research and improvement. Currently used products still have drawbacks such as complex surgical operation, significant soft tissue damage, uncertain bone transport, high treatment failure rate, complex product design, susceptibility to damage during treatment, and potential limb shortening after treatment. Utility Model Content

[0004] This invention provides an intramedullary bone transport device to solve the technical problems of severe soft tissue damage, long cycle, complicated operation, and easy infection caused by bone transport using external fixators.

[0005] This utility model provides an intramedullary bone transport device, wherein the intramedullary bone comprises a proximal bone block, a transport bone block, and a distal bone block arranged sequentially, characterized in that the transport device comprises:

[0006] A first fixation element is disposed on the proximal bone block;

[0007] The second fixation member has one side disposed on the distal bone block and the other side connected to the first fixation member.

[0008] Transport pins are disposed on the transport bone blocks;

[0009] The second fixing member has a guide rail, and the transport pin transports the transport bone block along the guide rail.

[0010] According to the intramedullary bone transport device provided by this utility model, the first fixing member includes:

[0011] A first fixing cylinder is disposed in the medullary cavity of the proximal bone block;

[0012] The first fixation nail passes through the medullary canal sidewall of the proximal bone block and the first fixation cylinder.

[0013] According to the present invention, an intramedullary bone transport device is provided in which a first through hole is formed inside the first fixing cylinder, and at least a portion of the first through hole is provided with an internal thread;

[0014] It also includes a top pressure rod, which is disposed in the first through hole, and at least a portion of the top pressure rod is threadedly connected to the first through hole.

[0015] According to the intramedullary bone transport device provided by this utility model, the second fixation member includes:

[0016] The second fixing cylinder has one end disposed in the medullary cavity of the distal bone block, and the other end of the second fixing cylinder passes through the medullary cavity of the transported bone block and is connected to the first fixing cylinder.

[0017] The second fixation nail passes through the medullary canal sidewall of the distal bone block and the second fixation cylinder.

[0018] According to the present invention, an intramedullary bone transport device is provided, wherein a second through hole is formed inside the end of the second fixing cylinder near the first fixing cylinder, and the second through hole communicates with the first through hole.

[0019] The end of the top pressure rod near the transport bone block abuts against the surface of the transport nail.

[0020] According to the present invention, an intramedullary bone transport device is provided, wherein the first fixing cylinder and the second fixing cylinder form an included angle.

[0021] According to the intramedullary bone transport device provided by this utility model, the top pressure rod includes:

[0022] The fastening part is threadedly connected to the first through hole, and a fastening groove is formed on the side of the fastening part away from the transport nail for cooperating with a wrench;

[0023] A pressing part is provided on the side of the fastening part near the transport nail, and the pressing part is movably inserted into the first through hole;

[0024] The top pressing part is elastic and can adapt to the curvature of the first through hole and / or the second through hole.

[0025] According to the intramedullary bone transport device provided by this utility model, it further includes:

[0026] A connector is disposed at the end of the first fixed cylinder away from the second fixed cylinder;

[0027] The connector connects the patient's internal and external environments, forming a channel for the wrench to enter the first through hole.

[0028] According to the present invention, an intramedullary bone transport device is provided, wherein the guide rail includes a first track, the first track is disposed between the first fixing nail and the second fixing nail, and the first track is disposed along the axial direction of the second fixing cylinder;

[0029] The transport pin cooperates with the first track to drive the transport bone block to move along the first track to the side away from the proximal bone block.

[0030] According to the present invention, an intramedullary bone transport device is provided, wherein the guide rail further includes a second track, the second track is disposed on the side of the first track away from the proximal bone block, and the second track is disposed along the axial direction of the second fixing cylinder;

[0031] The transport device further includes an extension pin, which is disposed on the distal bone block and engages with the second track.

[0032] The extension pin drives the distal bone block to move along the second track to the side away from the proximal bone block.

[0033] The above-mentioned one or more technical solutions provided by this utility model have at least the following beneficial effects: the first fixing member, the second fixing member, and the transport pin are respectively fixed to the proximal bone block, the distal bone block, and the transport bone block, which are firmly fixed and form a bone transport path; the transport bone is moved along the guide rail by the transport pin, which can effectively resist external forces, prevent bone displacement and rotation, and improve the stability of the bone transport process. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of the assembly of the transport device and the intramedullary bone according to an embodiment of the present invention;

[0036] Figure 2This is one of the structural schematic diagrams of the conveying device according to an embodiment of the present utility model;

[0037] Figure 3 This is the second structural schematic diagram of the conveying device according to an embodiment of this utility model;

[0038] Figure 4 This is a schematic diagram of the top pressure rod according to an embodiment of the present utility model;

[0039] Figure 5 The third schematic diagram of the conveying device according to an embodiment of this utility model.

[0040] Figure label:

[0041] 1. Proximal bone fragment; 2. Transported bone fragment; 3. Distal bone fragment;

[0042] 4. First fixing component; 41. First fixing cylinder; 411. First through hole; 42. First fixing pin;

[0043] 5. Second fixing component; 51. Guide rail; 511. First rail; 512. Second rail; 52. Second fixing cylinder; 521. Second through hole; 53. Second fixing pin;

[0044] 6. Transfer pin; 7. Top pressure rod; 71. Fastening part; 72. Top pressure part; 8. Connecting part; 9. Extension pin. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0046] The following is combined Figures 1-5 This invention describes an intramedullary bone transport device according to an embodiment of the present invention.

[0047] Figure 1 This is a schematic diagram of the assembly of the transport device and the intramedullary bone according to an embodiment of the present invention, as shown below. Figure 1 As shown, this utility model embodiment provides an intramedullary bone transport device. The intramedullary bone includes a proximal bone block 1, a transport bone block 2, and a distal bone block 3 arranged in sequence. The bone defect is located between the transport bone block 2 and the distal bone block 3. The transport bone block 2 is a healthy bone cut from the original proximal bone block 1.

[0048] The conveying device includes a first fixing member 4, a second fixing member 5, and a conveying pin 6;

[0049] The first fixation element 4 is disposed on the proximal bone block 1;

[0050] One side of the second fixation member 5 is disposed on the distal bone block 3, and the other side of the second fixation member 5 is connected to the first fixation member 4;

[0051] Transport nail 6 is installed on transport bone block 2;

[0052] Among them, the second fixing member 5 has a guide rail 51, and the transport nail 6 transports the transport bone block 2 along the guide rail 51.

[0053] Specifically, the first fixator 4, the second fixator 5, and the transport pin 6 are respectively fixed to the proximal bone block 1, the distal bone block 3, and the transport bone block 2, ensuring a secure fixation and forming a bone transport path. The transported bone is moved along the guide rail 51 via the transport pin 6, effectively resisting external forces, preventing bone displacement and rotation, and improving the stability of the bone transport process. This innovative structural design, combining multiple elements, enables autonomous intramedullary transport, ensuring stability, improving accuracy and efficiency, and reducing complications.

[0054] It should be understood that the intramedullary bone can be the femur or the tibia. Taking the femur as an example, the proximal bone block 1 and the distal bone block 3 are the parts of the femur that are close to the joint.

[0055] Figure 2 This is one of the structural schematic diagrams of the conveying device according to an embodiment of the present utility model, such as... Figure 2 As shown, according to an embodiment of the present invention, an intramedullary bone transport device is provided, wherein the first fixing member 4 includes a first fixing cylinder 41 and a first fixing nail 42;

[0056] The first fixing cylinder 41 is disposed in the medullary cavity of the proximal bone block 1;

[0057] The first fixation nail 42 passes through the medullary canal wall of the proximal bone block 1 and the first fixation cylinder 41.

[0058] In some possible embodiments of this utility model, the first fixing cylinder 41 is disposed in the medullary cavity of the proximal bone block 1, the end of which is away from the transported bone block 2 can be connected to the outside, and the end of which is close to the transported bone block 2 can be connected to the second fixing member 5.

[0059] In some possible embodiments of this utility model, the first fixation nails 42 are arranged radially or axially at intervals in the first fixation cylinder 41, with a quantity of at least two, to ensure that the first fixation nails 42 are interlocked and fixed on the proximal bone block 1, thereby achieving a stable internal fixation structure, improving patient comfort, and reducing complications.

[0060] Figure 3 This is a second schematic diagram of the conveying device according to an embodiment of this utility model, as shown below. Figure 3As shown, according to an embodiment of the present invention, an intramedullary bone transport device is provided, wherein a first through hole 411 is formed inside the first fixing cylinder 41, and at least a portion of the first through hole 411 is provided with internal threads;

[0061] It also includes a top pressure rod 7, which is disposed in the first through hole 411, and at least a portion of the top pressure rod 7 is threadedly connected to the first through hole 411.

[0062] It should be understood that when the first fixing pin 42 is inserted into the first fixing cylinder 41, it should avoid the first through hole 411, or at least the threaded section of the first through hole 411, so as to avoid positional conflict with the top pressure rod 7 and affect the normal operation of the top pressure rod 7.

[0063] In some possible embodiments of this utility model, the first through hole 411 includes a smooth section and a threaded section, the smooth section being disposed on the side close to the transport bone block 2, and the threaded section being disposed on the side away from the transport bone block 2.

[0064] In some possible embodiments of this utility model, the first through hole 411 includes at least two variable diameter structures; the first section has a larger inner diameter and its inner wall is threaded, while the second section has a smaller inner diameter and its inner wall is smooth. Its variable diameter structure can be adapted to the top pressure rod 7 with variable diameter.

[0065] According to an embodiment of the present invention, an intramedullary bone transport device is provided, wherein the second fixing member 5 includes a second fixing cylinder 52 and a second fixing nail 53;

[0066] One end of the second fixing cylinder 52 is disposed in the medullary cavity of the distal bone block 3, and the other end of the second fixing cylinder 52 passes through the medullary cavity of the transported bone block 2 and is connected to the first fixing cylinder 41.

[0067] The second fixation nail 53 passes through the medullary canal wall of the distal bone block 3 and the second fixation cylinder 52.

[0068] It should be understood that the second fixing cylinder 52 passes through the medullary cavity of the transported bone block 2, so that the transported bone block 2 is fitted onto the second fixing cylinder 52, thereby allowing the transported bone block 2 to move axially along the second fixing cylinder 52.

[0069] In some possible embodiments of this utility model, the second fixing cylinder 52 and the first fixing cylinder 41 are integrally formed, or can be detachably connected by means of threads or other means.

[0070] In some possible embodiments of this utility model, the first fixation nails 42 are arranged radially or axially at intervals in the first fixation cylinder 41, with a quantity of at least two, to ensure that the first fixation nails 42 are interlocked and fixed on the distal bone block 3, thereby achieving a stable internal fixation structure, improving patient comfort, and reducing complications.

[0071] According to an embodiment of the present invention, an intramedullary bone transport device is provided, wherein a second through hole 521 is formed inside the second fixing cylinder 52 near the first fixing cylinder 41, and the second through hole 521 communicates with the first through hole 411.

[0072] Among them, the end of the top pressure rod 7 near the transport bone block 2 abuts against the surface of the transport nail 6.

[0073] It should be understood that the second fixed cylinder 52 and the first fixed cylinder 41 are internally connected so that the end of the pressing rod 7 can move towards the side closer to the second fixed cylinder 52 through the first through hole 411 of the first fixed cylinder 41, so that the pressing rod 7 can press against the transport nail 6. During the rotation of the pressing rod 7 in the first through hole 411, the circumferential motion is converted into axial motion through the threaded connection, and a thrust is provided to the transport nail 6, thereby causing the transport nail 6 to drive the transport bone block 2 to move.

[0074] According to an embodiment of the present invention, an intramedullary bone transport device is provided, wherein a first fixing cylinder 41 and a second fixing cylinder 52 are formed at an angle.

[0075] It should be understood that the first fixation tube 41 is located on the proximal bone block 1, which needs to be connected to the outside world and should conform to the ergonomic characteristics of the human femur or tibia. The first fixation tube 41 and the second fixation tube 52 are not connected in a straight line, but have a certain angle.

[0076] An intramedullary bone transport device according to an embodiment of the present invention further includes a connector 8, which is disposed at the end of the first fixing cylinder 41 away from the second fixing cylinder 52.

[0077] Among them, the connector 8 connects the patient's internal environment and external environment, forming a channel for the wrench to enter the first through hole 411.

[0078] In some possible embodiments of this utility model, the connector 8 is made of a flexible material and can be a tube structure or other forms. If a tube structure is adopted, the material can be a soft material such as silicone. The connector 8 extends from outside the human body into the body and is sleeved and fixed to the first fixing cylinder 41. In order to prevent the connector 8 from falling off the first fixing cylinder 41, screws can also be added to enhance the connection stability between the two.

[0079] Figure 4 This is a schematic diagram of the top pressure rod 7 according to an embodiment of the present invention, as shown below. Figure 4 As shown, according to an embodiment of the present invention, an intramedullary bone transport device includes a pressure rod 7 comprising a fastening part 71 and a pressure part 72.

[0080] The fastening part 71 is threadedly connected to the first through hole 411, and a fastening groove is formed on the side of the fastening part 71 away from the transport nail 6 for engaging with a wrench.

[0081] The pressing part 72 is provided on the side of the fastening part 71 near the transport nail 6, and the pressing part 72 is movably inserted into the first through hole 411.

[0082] Understandably, the forward stroke of the pressing part 72 depends on the length of the threaded section in the first through hole 411. As the transport process progresses, the transported block 2 moves further and further away from the proximal block 1. When the fastening part 71 and the threaded engagement of the first through hole 411 reach their end, the end of the pressing part 72 can no longer move forward. If the transported block 2 is still not in place, a longer pressing rod 7 needs to be replaced to continue pressing the transported nail 6 and continue transporting until the transported block 2 reaches the designated position. In other words, there can be a variety of pressing rods 7 of different lengths to suit different transport distances.

[0083] According to an embodiment of the present invention, an intramedullary bone transport device is provided, wherein the pressing part 72 is elastic and can adapt to the curvature of the first through hole 411 and / or the second through hole 521.

[0084] In some possible implementations, in order to match the connection angle between the first fixed cylinder 41 and the second fixed cylinder 52, the top pressing part 72 can be made of a metal rod with elastic deformation function. The metal rod has a spaced connection seam in the axial direction, so that the curvature of the metal rod can be changed to a certain extent. When it is inserted into the first through hole 411, it can adapt to the curvature change at the connection between the first through hole 411 and the second through hole 521.

[0085] Specifically, the top pressure rod 7 provides precise control, is easy to operate, and offers a reliable power system. The displacement of the transported bone block 2 can be achieved by turning the top pressure part 72 with a wrench, and the traction force and speed can be precisely controlled. For example, the transported bone block 2 can be moved by one millimeter per day, allowing for easy self-operation by the patient. Compared to external fixation bone lengthening techniques, this method results in a smaller incision, less damage to soft tissues, a significantly reduced risk of infection, and eliminates the need for multiple surgeries. It is convenient, precise, and stable, greatly improving surgical efficiency and reducing patient suffering.

[0086] In some possible embodiments of this utility model, the outer diameter of the fastening part 71 is larger than the outer diameter of the pressing part 72, and the surface of the fastening part 71 is provided with threads, which are threaded to the first through hole 411. The end of the fastening part 71 is provided with a hexagonal or plum blossom-shaped fastening groove for cooperating with a wrench. The wrench enters from the connecting member 8, and the end of the wrench cooperates with the fastening groove, which can turn the pressing rod 7, so that it can rotate in the first through hole 411 and move axially along the first fixed cylinder 41 and the second fixed cylinder 52.

[0087] Figure 5 The third schematic diagram of the conveying device according to an embodiment of this utility model is shown below. Figure 5As shown, according to an embodiment of the present invention, an intramedullary bone transport device is provided, wherein the guide rail 51 includes a first track 511, the first track 511 is disposed between the first fixing nail 42 and the second fixing nail 53, and the first track 511 is disposed along the axial direction of the second fixing cylinder 52;

[0088] The transport nail 6 works in conjunction with the first track 511 to move the transport bone block 2 along the first track 511 toward the side away from the proximal bone block 1.

[0089] In some possible implementations, the first track 511 can be a strip-shaped hole, through which the transport pin 6 passes through the first track 511 and the medullary canal sidewall of the transported bone block 2, and gradually moves along the first track 511 toward the distal bone block under the pressure of the top pressure rod 7, until the transported bone block 2 finally establishes a connection with the distal bone block 3.

[0090] According to an embodiment of the present invention, an intramedullary bone transport device is provided, wherein the guide rail 51 further includes a second track 512, the second track 512 is disposed on the side of the first track 511 away from the proximal bone block 1, and the second track 512 is disposed along the axial direction of the second fixing cylinder 52.

[0091] The transport device also includes an extension pin 9, which is disposed on the distal bone block 3 and cooperates with the second track 512;

[0092] Among them, the extension nail 9 drives the distal bone block 3 to move along the second track 512 to the side away from the proximal bone block 1.

[0093] In some possible implementations, the second track 512 can be a strip-shaped hole; it is understood that after the bone transport is completed, that is, after the transported bone block 2 and the distal bone block 3 are connected and grow into one, the patient's limb often has the problem of overall shortening. At this time, bone lengthening surgery is required. On this basis, a second track 512 is also provided on the second fixation cylinder, which is located at the distal end of the first track 511.

[0094] Furthermore, after the transport nail 6 moves the transport bone block 2 into place, the transport bone block 2 and the distal bone block 3 have grown into a single unit. At this point, the following two situations may occur:

[0095] In the first case, if the transport pin 6 has not yet reached the end of the first track 511, after removing the second fixing pin 53, the top pressure rod 7 continues to press the transport pin 6, so that the transport pin 6 continues to drive the transport bone block 2 to move along the first track 511. Since the transport bone block 2 has been combined with the distal bone block as a whole, the transport bone block 2 transmits the pressure applied by the top pressure rod 7 to the distal bone block 3. Under the pressure of the top pressure rod 7, the distal bone block 3 moves along the second track 512 to the side away from the proximal bone block 1, thereby achieving limb extension.

[0096] In the second scenario, if the transport nail 6 has reached the end of the first track 511 and cannot continue, the transport nail 6 and the second fixing nail 53 are removed, the pressing rod 7 is passed through the medullary cavity of the transport bone block 2, the end of the pressing part 72 is directly pressed against the surface of the extension nail 9, and the fastening part 71 is turned to press the extension nail 9, so that the extension nail 9 drives the distal bone block 3 to move along the second track 512 to the side away from the proximal bone block 1, thereby achieving limb lengthening.

[0097] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0098] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An intramedullary bone transport device, wherein the intramedullary bone comprises a proximal bone block (1), a transport bone block (2), and a distal bone block (3) arranged sequentially, characterized in that, The conveying device includes: The first fixation member (4) is disposed on the proximal bone block (1); The second fixation member (5) is disposed on one side of the distal bone block (3), and the other side of the second fixation member (5) is connected to the first fixation member (4); Transport nail (6) is disposed on the transport bone block (2); The second fixing member (5) has a guide rail (51) formed thereon, and the transport pin (6) transports the transport bone block (2) along the guide rail (51).

2. The intramedullary bone transport device according to claim 1, characterized in that, The first fastener (4) includes: The first fixing tube (41) is disposed in the medullary cavity of the proximal bone block (1); The first fixation nail (42) passes through the medullary canal sidewall of the proximal bone block (1) and the first fixation tube (41).

3. The intramedullary bone transport device according to claim 2, characterized in that, The first fixed cylinder (41) has a first through hole (411) inside, and at least a portion of the first through hole (411) is provided with internal threads; It also includes a top pressure rod (7), which is disposed in the first through hole (411), and at least a portion of the top pressure rod (7) is threadedly connected to the first through hole (411).

4. The intramedullary bone transport device according to claim 3, characterized in that, The second fastener (5) includes: The second fixing cylinder (52) has one end disposed in the medullary cavity of the distal bone block (3) and the other end of the second fixing cylinder (52) passes through the medullary cavity of the transported bone block (2) and is connected to the first fixing cylinder (41). The second fixation nail (53) passes through the medullary canal sidewall of the distal bone block (3) and the second fixation tube (52).

5. The intramedullary bone transport device according to claim 4, characterized in that, The second fixed cylinder (52) has a second through hole (521) formed inside one end near the first fixed cylinder (41), and the second through hole (521) communicates with the first through hole (411); The top pressure rod (7) abuts against the surface of the transport nail (6) at one end near the transport bone block (2).

6. The intramedullary bone transport device according to claim 5, characterized in that, The first fixing cylinder (41) and the second fixing cylinder (52) form an angle.

7. The intramedullary bone transport device according to claim 6, characterized in that, The top pressure rod (7) includes: The fastening part (71) is threadedly connected to the first through hole (411), and the fastening part (71) has a fastening groove on the side away from the transport nail (6) for cooperating with a wrench; The pressing part (72) is disposed on the side of the fastening part (71) near the transport nail (6), and the pressing part (72) is movably inserted into the first through hole (411); The top pressing part (72) is elastic and can adapt to the curvature of the first through hole (411) and / or the second through hole (521).

8. The intramedullary bone transport device according to claim 4 or 5, characterized in that, Also includes: A connector (8) is disposed at the end of the first fixing cylinder (41) away from the second fixing cylinder (52); The connector (8) connects the patient's internal and external environments, forming a channel for the wrench to enter the first through hole (411).

9. The intramedullary bone transport device according to claim 4 or 5, characterized in that, The guide rail (51) includes a first track (511), which is disposed between the first fixing pin (42) and the second fixing pin (53), and the first track (511) is disposed along the axial direction of the second fixing cylinder (52); The transport pin (6) cooperates with the first track (511) to drive the transport bone block (2) to move along the first track (511) to the side away from the proximal bone block (1).

10. The intramedullary bone transport device according to claim 9, characterized in that, The guide rail (51) further includes a second rail (512), which is disposed on the side of the first rail (511) away from the proximal bone block (1), and the second rail (512) is disposed along the axial direction of the second fixing cylinder (52); The transport device further includes an extension pin (9), which is disposed on the distal bone block (3) and cooperates with the second track (512); The extension nail (9) drives the distal bone block (3) to move along the second track (512) to the side away from the proximal bone block (1).

Images