A fixing assembly of a navigation reference frame and an intramedullary nail aiming device

Abstract

The present invention provides a fixing component of a navigation reference frame and an intramedullary nail aiming instrument, which relates to the technical field of medical instruments, and comprises: a main body, which has an active cavity inside; a locking piece, which is arranged inside the active cavity and is provided with at least one contact surface relatively close to and far away from the inner wall of the active cavity; a clamping space is formed between the contact surface and the inner wall of the active cavity, and the cross section of the clamping space is defined as a clamping plane a; an adjusting rod connected to the main body, and a section of the adjusting rod penetrates the main body and is inserted into the active cavity; the longer the length of the section of the adjusting rod inserted into the active cavity, the smaller the maximum area of ​​the clamping plane a; the main body is provided with at least one connecting rod, and the other end of the connecting rod is fixedly connected to the reference frame, one end of the aiming instrument is inserted into the clamping space, and the other end of the aiming instrument is connected to the intramedullary nail, thereby solving the problem of how to quickly and stably set the reference frame on the aiming instrument.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, and in particular to a fixing assembly of a navigation reference frame and an intramedullary nail aiming device. Background Art

[0002] At present, when treating patients with long bone fractures, intramedullary nails are often used to fix the fracture site, that is, after the intramedullary nail is inserted into the bone cavity, a locking hole is drilled in the bone tissue, and then the bone tissue and the intramedullary nail are fixed together with a locking nail. Under normal circumstances, after a longer intramedullary nail is implanted into the bone cavity, due to the difference in individual physiological curvature, the intramedullary nail designed with reference to the universal curvature will undergo unexpected deformation in the bone cavity. For the aiming of the intramedullary nail, a special aiming instrument is often used;

[0003] However, the navigation positioning and registration system involved in the existing patent, a long bone surgery navigation positioning and registration system - CN202311734322.4, requires navigation and positioning through a reference frame, and the reference frame still needs to be fixed to the aiming instrument for tracking operations. How to quickly and stably set the reference frame to the aiming instrument is a technical problem that needs to be solved urgently in clinical practice. Summary of the invention

[0004] The present invention provides a fixing assembly of a navigation reference frame and an intramedullary nail aiming device, specifically comprising:

[0005] A main body having an active cavity inside; a locking piece disposed inside the active cavity and provided with at least one contact surface relatively close to and far away from the inner wall of the active cavity; a clamping space is formed between the contact surface and the inner wall of the active cavity, and the cross section of the clamping space is defined as a clamping plane a; an adjusting rod connected to the main body, and a section of the adjusting rod passes through the main body and is inserted into the active cavity; the longer the length of the section of the adjusting rod inserted into the active cavity, the smaller the maximum area of ​​the clamping plane a.

[0006] Preferably, the movable cavity has at least three inner walls, wherein at least two of the inner walls form an angle with the linear direction of movement of the locking member.

[0007] Preferably, the contact surface consists of two mutually perpendicular planes, the active cavity is rectangular as a whole, and the angle between two adjacent inner walls of the active cavity is 90°; a clamping space is formed between the contact surface and the inner wall of the active cavity, and the cross-sectional clamping plane a of the clamping space is rectangular.

[0008] Preferably, the main body is provided with at least one limiting groove, and the limiting groove is connected to the movable cavity; the locking member is provided with at least one limiting rod; and the limiting rod is inserted into the limiting groove.

[0009] Preferably, the main body is provided with a guide hole, and an adjusting rod is inserted into the guide hole; the adjusting rod moves along the axial direction of the guide hole to change the length of a section inserted into the active cavity, and a locking structure is provided between the adjusting rod and the main body, and the adjusting rod can be fixed in position with the main body through the locking structure when inserted into the active cavity at any length.

[0010] Preferably, the guide hole is a threaded hole, and the adjusting rod is a threaded rod; the adjusting rod is inserted into the guide hole.

[0011] Preferably, one end of an aiming instrument is inserted into the clamping space, and the other end of the aiming instrument is connected to an intramedullary nail.

[0012] Preferably, the main body is provided with at least one connecting rod, and the other end of the connecting rod is fixedly connected to the reference frame.

[0013] Preferably, a threaded hole is provided inside one end of the connecting rod connected to the reference frame, and a screw is rotatably connected to the connecting end of the reference frame; the screw at the connecting end is inserted into the threaded hole.

[0014] Preferably, the end surface of the connecting end is provided with an arc-shaped slot, and the end of the connecting rod connected to the reference frame is provided with a limiting column passing through the connecting rod, and when the connecting end is connected to the connecting rod, the limiting column is clamped in the slot.

[0015] The present invention also provides an intramedullary nail locking method, comprising:

[0016] The method is based on the above-mentioned intramedullary nail aiming instrument kit with a navigation reference frame to obtain the intramedullary nail placement posture in real time to achieve intramedullary nail locking; specifically:

[0017] S1. Calibrate the intramedullary nail aiming instrument kit of the navigation reference frame to obtain the fixed position relationship of each component in the kit;

[0018] S2, obtaining parameters of the intramedullary nail, wherein the parameters include the position and direction of the locking hole;

[0019] S3, the navigation system identifies the navigation reference frame and obtains the intramedullary nail placement position based on the fixed position relationship;

[0020] S4, determining the position and direction of the locking hole based on the intramedullary nail placement posture to achieve intramedullary nail locking.

[0021] In the present invention, the upper end of the main body is connected to the reference frame through a connecting rod, and at the same time, one end of the aiming instrument is inserted into the clamping space formed by the locking piece and the movable cavity, and the position of the locking piece is limited by the adjusting rod, so that the aiming instrument is stably connected to the reference frame, and the other end of the aiming instrument is connected to the intramedullary nail;

[0022] Through the above structure, it is ensured that the reference frame can be stably set on the aiming device, so that the reference frame and the intramedullary nail are linked, and the navigation system can position the intramedullary nail through the reference frame.

[0023] In the intramedullary nail locking method of the present invention, the intramedullary nail is accurately placed into the surgical site of the patient and the nail is locked by using an aiming instrument, thereby solving the inaccuracy problem caused by the change of the position of the intramedullary nail when the navigation reference frame rotates or moves during the operation. The aiming instrument can ensure that the position of the reference frame is fixed and does not change, which has important clinical value. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings of the embodiment are briefly introduced below.

[0025] The drawings described below are only related to some embodiments of the present invention, but are not intended to limit the present invention.

[0026] In the attached picture:

[0027] Figure 1 A three-dimensional structural schematic diagram of a fixing assembly according to an embodiment of the present invention is shown.

[0028] Figure 2 An exploded view of a fixing assembly according to an embodiment of the present invention is shown.

[0029] Figure 3 A schematic perspective cross-sectional view of a main body of a fixing assembly according to an embodiment of the present invention is shown.

[0030] Figure 4 A schematic diagram showing an unlocked state of a fixing assembly according to an embodiment of the present invention is shown.

[0031] Figure 5 A schematic diagram showing a locking state of a fixing assembly according to an embodiment of the present invention is shown.

[0032] Figure 6 A schematic diagram showing the connection of a fixing assembly, a reference frame and a sighting device according to an embodiment of the present invention is shown.

[0033] Figure 7 A schematic diagram showing the connection between a fixing assembly and a reference frame according to an embodiment of the present invention is shown.

[0034] Figure 8 The embodiment according to the present invention is shown Figure 7 A local enlarged schematic diagram of point A is shown.

[0035] Fig. 9 A schematic diagram showing the connection between a fixing assembly and a sighting device according to an embodiment of the present invention is shown.

[0036] Fig.10 A schematic diagram showing another embodiment of a locking member in a fixing assembly according to the present invention.

[0037] List of main reference symbols

[0038] 1. Main body; 101. Active cavity; 102. Limiting groove; 103. Guide hole;

[0039] 2. Connecting rod; 201. Threaded hole; 202. Limiting column;

[0040] 3. Adjustment rod;

[0041] 4. locking member; 401. contact surface;

[0042] 501. Aiming device; 502. Intramedullary nail;

[0043] 6. reference frame; 601. connection end; 602. card slot;

[0044] a. Clamping plane. DETAILED DESCRIPTION

[0045] In order to make the purpose, scheme and advantages of the technical solution of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of specific embodiments of the present invention.

[0046] Example: Please refer to Figures 1 to 10 :

[0047] like Figure 1 and Figure 2 As shown, the present invention proposes a fixing assembly of a navigation reference frame and an intramedullary nail aiming device, comprising:

[0048] The main body 1 has an active cavity 101 inside; in one embodiment, the sighting device 501 is rectangular, the main body 1 is rectangular as a whole, and the internal active cavity 101 is also rectangular. The two adjacent inner walls of the active cavity 101 constitute a right-angle plane for contacting the rectangular outer wall of the sighting device 501. At the same time, the contact area between the right-angle plane and the rectangular sighting device 501 is larger, which effectively ensures the stability of the clamping and prevents the reference frame 6 from rotating at the connection between the sighting device 501 and the reference frame 6; the locking member 4 is placed inside the active cavity 101 and is provided with at least one inner wall relatively close to and far from the active cavity 101. A clamping space is formed between the contact surface 401 and the inner wall of the active cavity 101, and the cross section of the clamping space is defined as a clamping plane a; the locking member 4 is restricted to move freely in the active cavity 101. In any embodiment, the shape of the clamping plane a changes according to the position of the locking member 4 relative to the inner wall of the active cavity 101 when the locking member 4 moves freely, so as to adapt to aiming devices 501 of different shapes. For example, in an embodiment in which the aiming device 501 is rectangular, in order to match the specifications of the aiming device 501, the clamping plane a is rectangular, and its aspect ratio can be determined by the position of the contact surface 401; Fig.10 As shown, in another embodiment, the contact surface 401 is arc-shaped, and the inner wall of the movable cavity 101 is also arc-shaped. Through this embodiment, the columnar aiming instrument 501 can be fixed; in another embodiment, the contact surface 401 is composed of multiple surfaces, and the movable cavity 101 also has multiple inner walls. For the aiming instrument 501 with an irregular shape, the contact points between the contact surface 401 and the movable cavity 101 and the aiming instrument 501 are increased as much as possible, thereby ensuring the stability of the fixation of the aiming instrument 501; an adjustment rod 3 connected to the main body 1, and a section of the adjustment rod 3 penetrates the main body 1 and is inserted into the movable cavity 101; the longer the length of the adjustment rod 3 inserted into the movable cavity 101, the smaller the maximum area of ​​the clamping plane a; after the aiming instrument 501 is inserted into the clamping space, the locking member 4 cooperates with the inner wall of the movable cavity 101 to limit the aiming instrument 501, and by changing the position of the adjustment rod 3, the position of the locking member 4 in the movable cavity 101 is limited to achieve locking of the aiming instrument 501.

[0049] As described above, after the present component locks the intramedullary nail 502 and the aiming instrument 501, the other end of the present component is connected to the reference frame 6, and the intramedullary nail 502, the aiming instrument 501, the present component and the reference frame 6 are connected to form an intramedullary nail aiming instrument kit.

[0050] Among them, Figure 2 , Figure 3 and Figure 5As shown, the movable cavity 101 has at least three inner walls, at least two of which have an angle with the linear direction of movement of the locking member 4; when the inner wall of the movable cavity 101 and the locking member 4 clamp the aiming device 501, it is ensured that there are at least three contact points between the three on the clamping plane a, and the support of the three points can ensure that the clamping of the aiming device 501 is more stable; in one embodiment, the locking member 4 has a contact surface 401, and the contact surface 401 is arc-shaped, and the movable cavity 101 has three inner walls that have an angle with the linear direction of movement of the locking member 4. In this embodiment, the inner wall of the movable cavity 101, the locking member 4 and the aiming device 501 have four contact points on the clamping plane a.

[0051] Among them, Figure 2 , Figure 4 and Figure 5 As shown, the contact surface 401 is composed of two mutually perpendicular planes, the movable cavity 101 is rectangular as a whole, and the angle between two adjacent inner walls of the movable cavity 101 is 90°; a clamping space is formed between the contact surface 401 and the inner wall of the movable cavity 101, and the cross-sectional clamping plane a of the clamping space is rectangular; through the rectangular clamping plane, when the rectangular aiming device 501 is inserted, the inner wall of the movable cavity 101 and the locking member 4 and the four surfaces of the aiming device 501 are fully fitted, which can effectively ensure the fixation of the aiming device 501 and prevent the aiming device 501 from rotating in the clamping space.

[0052] Among them, Figure 2 and Figure 3 As shown, the main body 1 is provided with at least one limiting groove 102, and the limiting groove 102 is connected to the active cavity 101; the locking piece 4 is provided with at least one limiting rod; the limiting rod is inserted into the inside of the limiting groove 102; the position of the locking piece 4 in the active cavity 101 is limited by the limiting groove 102 and the limiting rod to prevent the locking piece 4 from falling from the active cavity 101; one embodiment is that when there is only one limiting groove 102, the cross-sectional shape of the limiting rod is non-circular, and the gap between the limiting rod and the limiting groove 102 is smaller than the length of the shortest side of the limiting rod, so as to prevent the locking piece 4 from rotating relative to the limiting groove 102 when there is only one limiting groove 102; another embodiment is that when the number of limiting grooves 102 is greater than one and at least two of them have an angle, the cross-sectional shape of the limiting rod can be any shape, and the rotation of the locking piece 4 can be directly limited by at least two limiting grooves 102 with an angle.

[0053] Among them, Figure 3As shown, the main body 1 is provided with a guide hole 103, and an adjusting rod 3 is inserted into the guide hole 103; the adjusting rod 3 moves along the axial direction of the guide hole to change the length of a section inserted into the active cavity 101, and a locking structure is provided between the adjusting rod 3 and the main body 1, and the adjusting rod 3 can be fixed in position with the main body 1 when inserted into the active cavity 101 at any length through the locking structure; the adjusting rod 3 limits the locking piece 4 by changing the position and the connection relationship between the adjusting rod 3, the active cavity 101 and the main body 1, and one implementation method is that the main body 1 has a locking screw passing through the guide hole 103, and after the adjusting rod 3 limits the position of the locking piece 4, the adjusting rod 3 is limited and locked by tightening the locking screw.

[0054] Among them, Figure 3 and Figure 4 As shown, the guide hole 103 is a threaded hole, and the adjusting rod 3 is a threaded rod; the adjusting rod 3 is inserted into the guide hole 103; the movement of the adjusting rod 3 is achieved through the threaded connection between the adjusting rod 3 and the guide hole 103, and the self-locking of the position of the adjusting rod 3 is achieved.

[0055] The following is an embodiment of an intramedullary nail aiming instrument kit with a reference frame:

[0056] Among them, Figure 6 and Fig. 9 As shown, one end of the aiming instrument 501 is inserted into the clamping space, and the other end of the aiming instrument 501 is connected to the intramedullary nail 502 .

[0057] Among them, Figure 1 , Figure 2 and Figure 6 As shown, the main body 1 is provided with at least one connecting rod 2, and the other end of the connecting rod 2 is fixedly connected to the reference frame 6.

[0058] Among them, Figure 6 , Figure 7 and Figure 8 As shown, a threaded hole 201 is provided inside one end of the connecting rod 2 connected to the reference frame 6, and the connecting end 601 of the reference frame 6 is rotatably connected with a screw; the screw of the connecting end 601 is inserted into the threaded hole 201; through the thread, the reference frame 6 is fixedly connected to the fixed component to ensure the stability of the connection.

[0059] Among them, Figure 8 , Fig. 9 and Fig.10As shown, the end face of the connecting end 601 is provided with an arc-shaped slot 602, and the end where the connecting rod 2 is connected to the reference frame 6 is provided with a limiting column 202 that passes through the connecting rod 2. When the connecting end 601 is connected to the connecting rod 2, the limiting column 202 is engaged in the slot 602. Through the cooperation between the limiting column 202 and the slot 602, when the reference frame 6 is connected to the fixed component, relative rotation will not occur, thereby ensuring the accuracy of the reference frame 6.

[0060] In the above kit, after the intramedullary nail 502 is implanted into the patient's bone, the position of the screw is identified and located by the navigation tracking system through the reference frame 6 connected to the intramedullary nail 502, and displayed in real time, so as to determine the position of the screw of the intramedullary nail 502. The tracking process is as follows:

[0061] 1. Obtaining parameters of the intramedullary nail 502, wherein S1 obtains parameters of the intramedullary nail, wherein the intramedullary nail includes more than or equal to two locking nail holes, the locking nail holes have different directions and are located on the same straight line; the parameters include nail hole diameter, position between each nail hole, and direction of the nail hole;

[0062] 2. Obtain a real-time image of the intramedullary nail inserted into the surgical site of the patient through the navigation system. The real-time image of the intramedullary nail includes the position and direction of the first locking hole of the intramedullary nail and the position and direction of the second locking hole of the intramedullary nail;

[0063] 3. Calibrate the first screw to obtain a real-time image of the first screw, and display the relative position and direction of the first screw image and the first locking hole of the intramedullary nail in real time; the screw is calibrated by the navigation system identifying the reference frame on the screw, and the reference frame has an optical ball;

[0064] In one embodiment, the navigation system identifies the first screw with the optical ball reference frame 6 to obtain the spatial position of the first screw and displays the first screw image in real time, and adjusts the distance and direction according to the relative position and direction of the first screw image and the first locking screw hole, until the image of the first locking screw opening of the intramedullary nail in the surgical site image of the patient is inserted into the first screw image to obtain the surgical site image of the patient with the first screw inserted;

[0065] 4. Calibrate the second screw to obtain a real-time image of the first screw, and display the relative position and direction of the second screw image and the second locking screw hole of the intramedullary nail in real time.

[0066] Specific usage and function of this embodiment: In the present invention, the upper end of the main body 1 is connected to the reference frame 6 through the connecting rod 2. At the same time, one end of the aiming instrument 501 is inserted into the clamping space formed by the locking piece 4 and the movable cavity 101, and the position of the locking piece 4 is limited by the adjusting rod 3, so that the aiming instrument 501 is firmly connected to the reference frame 6, and the other end of the aiming instrument 501 is connected to the intramedullary nail 502, so that the navigation system can position the intramedullary nail 502 through the reference frame 6.

[0067] An intramedullary nail locking method provided in an embodiment of the present application includes:

[0068] The method is based on the above-mentioned intramedullary nail aiming instrument kit with a navigation reference frame to obtain the intramedullary nail placement posture in real time to achieve intramedullary nail locking; specifically:

[0069] S1. Calibrate the intramedullary nail aiming instrument kit of the navigation reference frame to obtain the fixed position relationship of each component in the kit;

[0070] S2, obtaining parameters of the intramedullary nail, including the position and direction of the locking hole;

[0071] S3, the navigation system identifies the navigation reference frame and obtains the intramedullary nail placement position based on the fixed position relationship;

[0072] S4. Determine the position and direction of the locking hole based on the intramedullary nail placement posture to achieve intramedullary nail locking.

[0073] In one embodiment, the method also includes calibration, and the calibration is performed by an intramedullary nail calibrator. The intramedullary nail calibrator contains M optical spheres, where M is a natural number greater than 3. The spatial position of the intramedullary nail calibrator is obtained after the intramedullary nail calibrator is calibrated by the optical spheres. The intramedullary nail is calibrated based on the spatial position of the intramedullary nail calibrator to obtain the spatial position relationship of the intramedullary nail. The spatial position relationship includes the vertex and axial direction of the intramedullary nail, and the position of each locking nail hole is obtained based on the vertex and axial direction.

[0074] In one embodiment, the intramedullary nail calibrator further includes K groups of calibration columns, K is a natural number greater than 1, and the intramedullary nail parameters are measured by the calibration columns to obtain the parameters of the intramedullary nail, and the intramedullary nail hole diameter and the intramedullary nail hole direction are obtained by the calibration columns.

[0075] In one embodiment, the calibration of the intramedullary nail includes nail head calibration and locking nail hole calibration. The nail head calibration is performed by calibrating in the calibration hole in the intramedullary nail calibrator to obtain the spatial position relationship of the nail head. The locking nail hole is calibrated by the calibration column in the intramedullary nail calibrator to obtain the spatial position relationship of the locking nail hole, and the locking nail holes are numbered to obtain the relative distance between the nail holes.

[0076] In one embodiment, after the intramedullary nail is calibrated and the parameters of the intramedullary nail are obtained, the intramedullary nail is tracked by a navigation system, and the intramedullary nail image is displayed in real time. The image of the intramedullary nail is inserted into the surgical site of the patient through the displayed intramedullary nail image and the preoperatively planned intramedullary nail installation path, and the real-time image of the intramedullary nail inserted into the surgical site of the patient is obtained. The real-time image of the intramedullary nail includes the position and direction of the first locking nail hole of the intramedullary nail and the position and direction of the second locking nail hole of the intramedullary nail. In one embodiment, the navigation system is an NDI infrared optical tracking system.

[0077] The embodiment of the present invention provides an intramedullary nail locking device, which obtains the intramedullary nail placement posture in real time based on the intramedullary nail aiming instrument kit with a navigation reference frame to achieve intramedullary nail locking; specifically:

[0078] S1. Calibrate the intramedullary nail aiming instrument kit of the navigation reference frame to obtain the fixed position relationship of each component in the kit;

[0079] S2, obtaining parameters of the intramedullary nail, including the position and direction of the locking hole;

[0080] S3, the navigation system identifies the navigation reference frame and obtains the intramedullary nail placement position based on the fixed position relationship;

[0081] S4. Determine the position and direction of the locking hole based on the intramedullary nail placement posture to achieve intramedullary nail locking.

[0082] The above are merely exemplary embodiments of the present invention and are not intended to limit the protection scope of the present invention. The protection scope of the present invention is determined by the appended claims.

Claims

1. A fixing assembly of a navigation reference frame and an intramedullary nail aiming device, characterized in that: include: A main body (1) having an active cavity (101), wherein at least one inner wall of the active cavity (101) is in contact with the aiming device; A locking member (4) is disposed inside the movable cavity (101) and is provided with at least two contact surfaces (401) for contacting the aiming device; An adjusting rod (3) connected to the main body (1), with a section of the adjusting rod (3) penetrating the main body (1) and inserted into the interior of the active cavity (101); the central axis of the adjusting rod (3) intersects with the plane of the inner wall of the active cavity (101) and the intersection line of at least two contact surfaces (401), and the central axis of the adjusting rod (3) is perpendicular to the intersection line of at least two contact surfaces (401); The aiming device is inserted between the contact surface (401) and the inner wall of the active cavity (101), and the adjusting rod (3) is displaced along its own axis in the active cavity (101) and abuts against the locking member (4).

2. A fixing assembly of a navigation reference frame and an intramedullary nail aiming device according to claim 1, characterized in that: The movable cavity (101) has at least three inner walls, wherein at least two of the inner walls have an angle with the linear direction of movement of the locking member (4).

3. A fixing assembly of a navigation reference frame and an intramedullary nail aiming device according to claim 2, characterized in that: The contact surface (401) is composed of two mutually perpendicular planes, the active cavity (101) is rectangular as a whole, and the angle between two adjacent inner walls of the active cavity (101) is 90°; a clamping space is formed between the contact surface (401) and the inner wall of the active cavity (101), and the cross-sectional clamping plane (a) of the clamping space is rectangular.

4. A fixing assembly of a navigation reference frame and an intramedullary nail aiming device according to claim 1, characterized in that: The main body (1) is provided with at least one limiting groove (102), and the limiting groove (102) is connected to the active cavity (101); the locking member (4) is provided with at least one limiting rod; the limiting rod is inserted into the limiting groove (102).

5. A fixing assembly of a navigation reference frame and an intramedullary nail aiming device according to claim 1, characterized in that: The main body (1) is provided with a guide hole (103), and an adjusting rod (3) is inserted into the guide hole (103); the adjusting rod (3) moves along the axial direction of the guide hole so that the length of a section inserted into the active cavity (101) changes, and a locking structure is provided between the adjusting rod (3) and the main body (1). The locking structure allows the adjusting rod (3) to be fixed in position with the main body (1) when inserted into the active cavity (101) to any length.

6. A fixing assembly of a navigation reference frame and an intramedullary nail aiming device according to claim 5, characterized in that: The guide hole (103) is a threaded hole, and the adjustment rod (3) is a threaded rod; the adjustment rod (3) is inserted into the guide hole (103).

7. An intramedullary nail aiming instrument kit with a navigation reference frame, comprising a fixation assembly according to any one of claims 1 to 6, a reference frame (6) and an intramedullary nail (502), characterized in that: The main body (1) is provided with at least one connecting rod (2), and the other end of the connecting rod (2) is fixedly connected to a reference frame (6); one end of an aiming instrument (501) is inserted into the clamping space of the fixing assembly, and the other end of the aiming instrument (501) is connected to an intramedullary nail (502).

8. The intramedullary nail aiming instrument kit with a navigation reference frame according to claim 7, characterized in that: A threaded hole (201) is provided inside one end of the connecting rod (2) connected to the reference frame (6), and a screw is rotatably connected to the connecting end (601) of the reference frame (6); the screw of the connecting end (601) is inserted into the threaded hole (201).

9. The intramedullary nail aiming instrument kit with a navigation reference frame according to claim 8, characterized in that: The end surface of the connecting end (601) is provided with an arc-shaped slot (602), and one end of the connecting rod (2) connected to the reference frame (6) is provided with a limiting column (202) penetrating the connecting rod (2); when the connecting end (601) is connected to the connecting rod (2), the limiting column (202) is locked in the slot (602).

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