Intramedullary nail aiming device and surgical instrument box containing the same

Abstract

The present invention provides an intramedullary nail aimer and a surgical instrument box containing the same, belonging to the technical field of surgical instruments. The intramedullary nail aimer comprises a proximal aiming module, an adjustment module, and a distal aiming module connected in sequence; the adjustment module comprises a first adjustment block and a second adjustment block; the proximal end of the first adjustment block is connected to the proximal aiming module, the distal end of the first adjustment block is rotatably connected to the proximal end of the second adjustment block, and the distal end of the second adjustment block is connected to the distal aiming module. The intramedullary nail aimer has a simple structure and is easy to use. It can rotate when aiming at the distal end of the intramedullary nail, and can meet the needs of aiming at various angles of intramedullary nail holes. In addition, the intramedullary nail aimer has a stable structure and is detachable, and can be connected to the distal aiming module according to surgical needs. The rotation angle and vertical position of the intramedullary nail can be adjusted to meet the various needs of people of different heights, people with different bone structure curvature, etc.

Description

Technical Field

[0001] The invention belongs to the technical field of surgical instruments, and in particular relates to an intramedullary nail aimer and a surgical instrument box containing the same. Background Art

[0002] Limb surgeries account for a large proportion of bone trauma surgeries. In order to facilitate doctors' surgical operations, some special instruments will be designed according to different types of surgeries to save surgical time and help doctors complete the surgery better.

[0003] Intramedullary fixation (IMF) is currently widely used in orthopedic medical devices due to its advantages, such as better control of axial force lines. An IMF aimer is one of the surgical instruments used for IMF. While it can be used for external aiming, existing IMF aimers cannot rotate when aiming at the distal hole of the IMF, making it difficult to aim at certain locking holes within the IMF. Summary of the Invention

[0004] In view of this, the present invention aims to provide an intramedullary nail aimer and a surgical instrument box containing the same. The intramedullary nail aimer has a simple structure and can rotate when aiming at the distal end of the intramedullary nail, thereby meeting the requirements for aiming at various angles of intramedullary nail holes.

[0005] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0006] An intramedullary nail aimer, comprising a proximal aiming module, an adjustment module and a distal aiming module connected in sequence;

[0007] The adjustment module includes a first adjustment block and a second adjustment block; the proximal end of the first adjustment block is connected to the proximal aiming module, the distal end of the first adjustment block is rotatably connected to the proximal end of the second adjustment block, and the distal end of the second adjustment block is connected to the distal aiming module.

[0008] Furthermore, the first adjustment block includes a first body and a ball-end threaded rod; the proximal end of the first body is connected to the proximal aiming module, and the distal end is provided with a positioning cavity, and the side wall of the positioning cavity is provided with a threaded hole;

[0009] The second adjusting block includes a second body, and a accommodating cavity for the ball head is provided at the proximal end of the second body;

[0010] The proximal end of the second body is located in the positioning cavity, and the first body and the second body are rotatably connected via a rotating shaft; the ball head of the ball head threaded rod is located in the accommodating cavity, and the threaded rod of the ball head threaded rod is threadedly engaged with the threaded hole;

[0011] The second adjusting block of the rotating ball head threaded rod can rotate around the rotation axis.

[0012] Furthermore, the second body is provided with a channel communicating with the accommodating cavity, and the channel is filled with a filler for increasing the friction between the ball head and the accommodating cavity.

[0013] Furthermore, the first adjustment block further includes a third knob, which is arranged at an end of the ball head threaded rod opposite to the ball head;

[0014] The second adjustment block further includes a fourth locking member, which includes a fourth knob and a fourth threaded rod that are clamped together, and the fourth threaded rod is threadedly engaged with a threaded hole provided in the recess at the distal end of the second body.

[0015] Furthermore, the second body is a bending handle, and the bending angle is greater than 90°.

[0016] Furthermore, the proximal aiming module includes a proximal aiming arm and a proximal damping plate, one end of the proximal damping plate is fixed to the proximal aiming arm, and the other end is freely set, and there is a gap between the proximal damping plate and the proximal aiming arm; the proximal aiming arm and the proximal damping plate are correspondingly provided with first aiming holes.

[0017] Furthermore, a positioning groove and a second locking piece are provided at the distal end of the proximal aiming arm, a positioning pin is provided at the proximal end of the first body, the positioning pin is inserted into the positioning groove, and the second locking piece locks the positioning pin in the positioning groove.

[0018] Furthermore, the distal aiming block includes a distal aiming arm, which can slide in a groove at the distal end of the second body and can be fixed in the groove by a fourth locking member.

[0019] Furthermore, the intramedullary nail aiming device further includes a connecting module, which is connected to the proximal aiming module.

[0020] The present invention also provides an intramedullary nail surgical instrument box, which includes the intramedullary nail aiming device described above.

[0021] Compared with the prior art, the intramedullary nail aimer and the surgical instrument box containing the same of the present invention have the following advantages:

[0022] (1) The intramedullary nail aiming device adjustment module has a simple structure and is easy to adjust. By adjusting the adjustment module, the purpose of rotating the distal aiming module can be achieved, and the aiming of various angle holes of the intramedullary nail can be met;

[0023] (2) The intramedullary nail aiming device can be connected to or not to a distal aiming module as required, thereby avoiding the inconvenience of replacing surgical instruments during surgery and the extension of surgical time, and also saving surgical costs; it is practical and economical;

[0024] (3) The intramedullary nail aimer is provided with a damping plate, which can prevent the protective sleeve from shaking during surgery and ensure accurate positioning;

[0025] (4) The detachable connection structure between the proximal aiming module and the adjustment module of the intramedullary nail aimer is firmly fixed, which can prevent the locking mechanism from shaking during surgery;

[0026] (5) The connecting module of the intramedullary nail aimer is rotatable, which facilitates the adjustment of the rotation angle and the upper and lower positions of the intramedullary nail, and can meet the needs of people of different heights and different bone structures for intramedullary nails of different lengths and curvatures. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings, which constitute part of the present invention, are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0028] Figure 1 This is a schematic diagram of the three-dimensional structure of the intramedullary nail aimer provided by one embodiment of the present invention after connecting the intramedullary nail, the protective sleeve and the drill bit;

[0029] Figure 2 A schematic diagram of the three-dimensional structure of the proximal aiming device for an intramedullary nail provided in one embodiment of the present invention;

[0030] Figure 3 A top view of an intramedullary nail aiming device provided in one embodiment of the present invention;

[0031] Figure 4 for Figure 3 Schematic cross-sectional view of the middle BB;

[0032] Figure 5 for Figure 4 A magnified view of some structures in ;

[0033] Figure 6 for Figure 3 CC section view in.

[0034] Description of reference numerals:

[0035] 1. Intramedullary nail;

[0036] 2. Connect the modules; 21. Lock the inner sleeve; 22. Secure the outer sleeve;

[0037] 3. Proximal targeting module;

[0038] 31. First connecting unit; 311. Sleeve; 312. Positioning portion; 313. Fixing block; 314. First knob; 315. Fixing pin; 316. Sliding rod; 317. Pressing piece; 318. Spring;

[0039] 32. Proximal aiming unit; 321. Proximal aiming arm; 322. Proximal damping plate; 323. First aiming hole;

[0040] 33. Second connecting unit; 331. Positioning groove; 332. Second knob; 333. Fixing pin; 334. Threaded hole;

[0041] 4. Remote aiming module;

[0042] 41. Distal aiming arm; 42. Distal aiming hole;

[0043] 5. Protective sleeve;

[0044] 6. Drill bit;

[0045] 7. Adjustment module;

[0046] 71. First adjustment block; 711. First body; 712. Ball-end threaded rod; 713. Third knob; 714. Positioning pin; 715. Positioning cavity; 716. First threaded hole; 717. Rotation axis; 718. Elastic member;

[0047] 72. Second adjustment block; 721. Second body; 722. Accommodating cavity; 723. Channel; 724. Filler; 725. Fourth locking member. DETAILED DESCRIPTION

[0048] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0049] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0050] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0051] The proximal end and the distal end are named according to the distance between the intramedullary nail aimer and the operator. The proximal end refers to the end of the intramedullary nail aimer closer to the operator, and the distal end refers to the end of the intramedullary nail aimer farther from the operator.

[0052] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0053] An intramedullary nail surgical instrument box includes an intramedullary nail aiming device, the intramedullary nail aiming device is as follows Figure 1-6 As shown:

[0054] The intramedullary nail aimer comprises a connection module 2, a proximal aiming module 3, an adjustment module 7 and a distal aiming module 4 which are connected in sequence;

[0055] The connecting module 2 includes a locking inner sleeve 21 and a fixed outer sleeve 22. One end of the locking inner sleeve 21 passes through the interior of the fixed outer sleeve 22 and is coaxially connected thereto, and then is threadedly connected to the intramedullary nail 1. The other end is arranged outside the fixed outer sleeve 22.

[0056] The locking inner sleeve 21 is a rod-type structure, and its end extending into the fixed outer sleeve 22 has a threaded structure, and the threaded structure is consistent with the tail thread of the intramedullary nail 1. The locking inner sleeve 21 is provided with a tightening drive structure at the end away from the intramedullary nail 1, and the drive structure is a hexagonal, plum blossom or square structure; the fixed outer sleeve 22 is a hollow rod-type structure, and its end close to the intramedullary nail 1 is provided with an anti-fool structure, and the side wall of the fixed outer sleeve 22 in contact with the proximal aiming module 3 is provided with a tapered hole or a circular hole structure for rotational positioning.

[0057] The proximal aiming module 3 includes a first connection unit 31, a proximal aiming unit 32 and a second connection unit 33;

[0058] The first connecting unit 31 is used to connect to the connecting module 2; specifically, the first connecting unit 31 includes a connecting sleeve fixed to one end of the proximal aiming unit 32 and a fixing portion provided on the connecting sleeve for cooperating with the fixed outer sleeve 22;

[0059] The connecting sleeve includes a sleeve 311 and a positioning portion 312 provided on the outer wall of the sleeve 311 , wherein the positioning portion 312 is fixed to one end of the proximal aiming unit 32 ;

[0060] When the cam 314 is in the unlock position, the locking cam 315 is locked and the locking cam 316 is locked, so that the cam 314 can be unlocked and locked. When the connecting module 2 is placed in the sleeve 311, the first knob 314 is rotated to make the fixing pin 315 cooperate with the circular hole or tapered hole provided on the outer wall of the fixed outer sleeve 22; when the connecting module 2 needs to be moved, the first knob 314 is first turned to loosen the connection between the fixing pin 315 and the tapered hole or circular hole on the fixed outer sleeve 22, and then the connecting module 2 is moved as needed. Since the outer surface of the fixed outer sleeve 22 is provided with multiple tapered holes or circular holes as needed, and the hollow structure of the fixing pin 315 is provided with an elastic spring 318, after the fixing pin 315 cooperates with different tapered holes or circular holes, the operator can hear a sound to prompt the moving position and matching status of the connecting module 2; the spring 318 can be replaced by other elastic members; the first connecting unit and the connecting module cooperate with each other to move the position of the intramedullary nail 1 to adapt to different patients;

[0061] The proximal aiming unit 32 includes a proximal aiming arm 321 and a proximal damping plate 322. One end of the proximal damping plate 322 is fixed to the proximal aiming arm 321, while the other end is freely disposed. A gap is formed between the proximal damping plate 322 and the proximal aiming arm 321. First aiming holes 323 are correspondingly disposed on the proximal aiming arm 321 and the proximal damping plate 322. One or more first aiming holes 323 can be provided as needed, such as two, three, or five. The free end of the proximal damping plate 322 is disposed at the distal end of the proximal aiming module 3.

[0062] The second connecting unit 33 is provided at the bottom of the distal end of the proximal aiming arm 321 and includes a positioning groove 331, a threaded hole 334 connected to the positioning groove 331 and provided on the side surface of the distal end of the proximal aiming arm 321, a second knob 332, and a fixing pin 333 fixedly connected to the second knob 332. The fixing pin 333 has a threaded outer surface that is threadedly engaged with the threaded hole 334. The positioning groove 331 is preferably a stepped groove, in which case the connection between the proximal aiming arm 321 and the distal aiming arm 421 is more stable.

[0063] The distal aiming module 4 includes a distal aiming arm 41, which is provided with a distal aiming hole 42 for aiming at the distal locking hole of the intramedullary nail 1; preferably, a sliding groove is provided on the side of the distal aiming arm 41; preferably, the distal aiming arm 41 is a V-shaped structure or a T-shaped structure;

[0064] The adjustment module 7 includes a first adjustment block 71 and a second adjustment block 72;

[0065] The first adjustment block 71 includes a first body 711, a ball-end threaded rod 712, and a third knob 713. A positioning pin 714 is provided at the proximal end of the first body 711. The positioning pin 714 is inserted into the positioning groove of the proximal aiming arm, and a positioning recess is provided on the positioning pin 714. A positioning cavity 715 is provided at the distal end of the first body 711, and a first threaded hole 716 is provided on the side wall of the positioning cavity 715. The first body 711 is preferably handle-shaped. The positioning pin 714 is preferably a stepped positioning pin 714 that cooperates with the positioning groove.

[0066] The second adjustment block 72 includes a second body 721. A spherical head receiving cavity 722 and a channel 723 communicating with the receiving cavity 722 are provided at the proximal end of the second body 721. The channel 723 is filled with a filler 724, which may be a polymer material such as silicone. A slidable receiving groove is provided at the distal end of the second body 721, which receives the distal aiming arm 41. A second threaded hole and a fourth locking member 725 cooperating with the threaded hole are provided at the bottom of the receiving groove.

[0067] The proximal end of the second body 721 is located in the positioning cavity 715, and the first body 711 and the second body 721 are rotatably connected via a rotating shaft 717; the ball head of the ball threaded rod 712 is located in the accommodating cavity 722, and the threaded rod of the ball threaded rod 712 is threadedly engaged with the first threaded hole 716; the second adjustment block 72 can be rotated around the rotating shaft 717 by rotating the ball threaded rod 712; preferably, the portion of the ball threaded rod 712 extending out of the first threaded hole 716 is further sleeved with an elastic member 718, such as a spring, and the spring is located between the first body 711 and the third knob 713;

[0068] A locking member, such as a fixing plate, is provided at one end of the channel 723 away from the ball head to prevent the filler 724 from flowing out;

[0069] Preferably, a sliding protrusion is provided on the side wall of the accommodating groove. When the distal aiming arm 41 is placed in the accommodating groove, the sliding groove and the sliding protrusion are loosely engaged, allowing the distal aiming arm 41 to slide in the accommodating groove. The fourth locking member 725 passes through the aiming hole of the distal aiming arm 41 and is threadedly engaged with the second threaded hole at the bottom of the accommodating groove to secure the distal aiming arm 41 in the accommodating groove. Preferably, the fourth locking member 725 includes a fourth knob and a fourth threaded rod that are engaged with each other.

[0070] The bottom surface of the receiving groove can be designed as a horizontal surface or an inclined surface according to the distal aiming requirement, so as to be able to aim at the locking hole at the distal end of the intramedullary nail 1;

[0071] The second body 721 is preferably a bending handle; the bending angle is preferably greater than 90° to prevent interference between the distal aiming arm 41 and the third knob 713; the bending angle can be 95°, 98°, 110° or 130°, etc.

[0072] The assembly process of the intramedullary nail aimer comprises the following steps:

[0073] (1) Assembling the connection module 2: The locking inner sleeve 21 and the fixed outer sleeve 22 are matched through the hole axis to assemble the connection module 2;

[0074] (2) The connection module 2 is connected to the proximal aiming module 3: the fixed outer sleeve 22 is assembled into the sleeve 311 of the first connecting unit 31 of the proximal aiming module 3, and the first knob 314 is turned, thereby driving the slide rod 316 to slide spirally along the spiral slideway on the fixed block 313; during the sliding process, the pressing piece 317 is continuously pressed, and the pressing piece 317 squeezes the spring 318, causing deformation, and pushing the head of the fixing pin 315 into the sleeve 311, cooperating with the hole set in the outer wall of the fixed outer sleeve 22, thereby fixing the connection module 2;

[0075] (3) Connecting the proximal aiming module 3 and the adjustment module 7: inserting the positioning pin 714 provided on the first body 711 into the positioning groove of the proximal aiming arm 321, rotating the second knob 332 to fix the positioning pin 714 in the positioning groove, and placing the end of the positioning pin 714 extending into the positioning groove 331 in the positioning recess of the positioning pin 714;

[0076] (4) Connecting the adjustment module 7 and the distal aiming module 4: placing the distal aiming arm 41 in the accommodating groove at the distal end of the second body 721, and passing the fourth locking member 725 that cooperates with the second threaded hole at the bottom of the accommodating groove through the aiming hole on the distal aiming arm 41 and the second threaded hole at the bottom of the accommodating groove, thereby locking the distal aiming arm 41 in the accommodating groove.

[0077] The method for using the intramedullary nail aimer comprises the following steps:

[0078] (1) Thread the intramedullary nail 1 into the connecting inner sleeve 21; rotate the fixed outer sleeve 22 to adjust the vertical position and rotation angle of the intramedullary nail 1;

[0079] (2) Proximal aiming: The protective sleeve 5 passes through the proximal damping plate 322 and the first aiming hole 323 of the proximal aiming arm 321. Due to the elastic effect of the proximal damping plate 322 and the friction force, the protective sleeve 5 is firmly fixed in a certain position. Afterwards, the drill bit 6 passes through the protective sleeve 5, makes a hole, and smoothly passes through the locking hole on the intramedullary nail 1.

[0080] (3) Adjusting the adjustment module 7: rotating the third knob 713 on the first body 711 so that the ball-end threaded rod 712 extends into or out of the positioning cavity 715, thereby driving the second body 721 to rotate around the rotation axis 717. The second body 721 drives the distal aiming arm 41 to rotate until the aiming hole on the distal aiming arm 41 is aligned with the locking hole of the intramedullary nail. The third knob 713 of the first body 711 is no longer rotated.

[0081] (4) Distal aiming: Rotate the fourth knob to remove the fourth locking piece, so that the distal aiming arm 41 can slide in the accommodating groove at the distal end of the second body 721. When the aiming hole on the distal aiming arm 41 is aligned with the locking hole at the distal end of the intramedullary nail, pass the fourth threaded rod through the aiming hole of the distal aiming arm 41 and the second threaded hole of the accommodating groove to position the distal aiming arm 41. Thereafter, the protective sleeve 5 passes through the aiming hole of the distal aiming arm 41 and is aligned with the locking hole at the distal end of the intramedullary nail. The drill bit 6 passes through the protective sleeve 5 to make a hole and smoothly passes through the locking hole on the intramedullary nail 1.

[0082] Since the distal aiming module 4 and the adjustment module 7, as well as the adjustment module 7 and the distal aiming module 4, are detachably connected, during use, the proximal aiming operation can be performed first, and then the adjustment module 7 and the distal aiming module 4 can be installed on the proximal aiming module 3, or the assembled adjustment module 7 and the distal aiming module 4 can be installed on the proximal aiming module 3 to perform the distal aiming operation. In this way, the intramedullary nail aimer can achieve both proximal and distal aiming at the same time. Moreover, since surgical instruments are generally of relatively large mass, the adjustment module 7 and the distal aiming module 4 can be omitted first, which can facilitate the operator's operation. Compared with an aimer with separate proximal and distal aiming, it can save the operator the step of replacing surgical instruments during surgery, thereby saving surgical time and surgical costs, and has better economy and practicality. Moreover, the intramedullary nail aimer has a simple structure and is easy to use. Moreover, due to the setting of the adjustment module 7, the distal aiming module 4 is adjustable.

[0083] In addition, the adjustment module 7 has a simple structure and is easy to use. For intramedullary nails 1 of different lengths, it is only necessary to slide the distal aiming arm 41 without replacing the distal aiming arm 41, saving surgical steps and time. Moreover, by adjusting the adjustment module 7, the distal aiming module 4 can be rotated to meet the aiming requirements of various angle holes of the intramedullary nail 1.

[0084] In addition, the intramedullary nail aimer is provided with a proximal damping plate 322, which can prevent the guide sleeve from shaking during surgery and ensure accurate positioning. The detachable connection structure between the proximal aiming arm 321 and the first body 711 of the intramedullary nail aimer is firmly fixed, which can also prevent the surgical instrument from shaking during surgery.

[0085] Since the intramedullary nail aimer can adjust the rotation angle and the up and down position of the intramedullary nail 1, it can meet the various needs of people of different heights, people with different bone structure curvature, etc.

[0086] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An intramedullary nail aimer, characterized in that: The intramedullary nail aimer comprises a proximal aiming module, an adjustment module and a distal aiming module connected in sequence; The adjustment module includes a first adjustment block and a second adjustment block; the proximal end of the first adjustment block is connected to the proximal aiming module, the distal end of the first adjustment block is rotatably connected to the proximal end of the second adjustment block, and the distal end of the second adjustment block is connected to the distal aiming module; The first adjustment block includes a first body and a ball-end threaded rod; the proximal end of the first body is connected to the proximal aiming module, and the distal end is provided with a positioning cavity, and the side wall of the positioning cavity is provided with a threaded hole; The second adjustment block includes a second body, the second body is a bent handle, and a accommodating cavity for the ball head is provided at the proximal end of the second body; The proximal end of the second body is located in the positioning cavity, and the first body and the second body are rotatably connected via a rotating shaft; the ball head of the ball head threaded rod is located in the accommodating cavity, and the threaded rod of the ball head threaded rod is threadedly engaged with the threaded hole; The second adjusting block of the rotating ball head threaded rod can rotate around the rotation axis; The distal aiming module includes a distal aiming arm, which is capable of sliding in a groove at the distal end of the second body and being fixed in the groove by a fourth locking member; The proximal aiming module includes a proximal aiming arm and a proximal damping plate, one end of the proximal damping plate is fixed to the proximal aiming arm, and the other end is freely arranged, with a gap between the proximal damping plate and the proximal aiming arm; the proximal aiming arm and the proximal damping plate are correspondingly provided with first aiming holes; The intramedullary nail aiming device further comprises a connecting module, which is connected to the proximal aiming module; The proximal aiming module also includes a first connecting unit, which includes a connecting sleeve fixed at one end of the proximal aiming arm and a fixing portion arranged on the connecting sleeve for cooperating with the connecting module, the fixing portion is an elastic locking mechanism, the connecting module is used to connect the intramedullary nail, and a conical hole or a circular hole structure for rotational positioning is provided on the side wall of the connecting module in contact with the first connecting unit.

2. The intramedullary nail aiming device according to claim 1, characterized in that: The second body is provided with a channel communicating with the accommodating cavity, and the channel is filled with a filler that increases friction.

3. The intramedullary nail aiming device according to claim 1, characterized in that: The first adjustment block further includes a third knob, which is arranged at an end of the ball head threaded rod opposite to the ball head; The second adjustment block further includes a fourth locking member, which includes a fourth knob and a fourth threaded rod that are clamped together, and the fourth threaded rod is threadedly engaged with a threaded hole provided in the recess at the distal end of the second body.

4. The intramedullary nail aiming device according to claim 1, characterized in that: The second body is a bending handle, and the bending angle is greater than 90°.

5. The intramedullary nail aiming device according to claim 1, characterized in that: A positioning groove and a second locking piece are provided at the distal end of the proximal aiming arm, a positioning pin is provided at the proximal end of the first body, the positioning pin is inserted into the positioning groove, and the second locking piece locks the positioning pin in the positioning groove.

6. An intramedullary nail surgical instrument kit, comprising the intramedullary nail aiming device according to any one of claims 1 to 5.

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