Aiming module, intramedullary nail aiming arm and intramedullary nail aiming device

Abstract

The invention discloses an aiming module, an intramedullary nail aiming arm and an intramedullary nail aiming device. In the invention, the intramedullary nail aiming arm comprises: a gear lever; an aiming module, the aiming module comprises: a first aiming member, the first aiming member comprises: a first aiming body, and an adjusting block; a first guide groove is provided on the first aiming body; a guide hole is provided on the adjusting block, and the guide hole and the area of ​​the first guide groove covered by the guide hole form a first hole position; a second aiming member, the second aiming member is slidably connected to the first aiming body; a second guide groove is provided on the second aiming member; the second guide groove has a second hole position; when the second aiming member is at the aiming position, the center of the second hole position is on the same horizontal line as the center of any first hole position, and the first aiming body and the second aiming member are locked and fixed. This reduces the number of X-ray fluoroscopy during surgery, and does not require additional positioning holes to be added to the patient's affected limb bone, thereby reducing trauma to the patient.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to an aiming module, an intramedullary nail aiming arm and an intramedullary nail aiming device. Background Art

[0002] Intramedullary nail treatment is a commonly used internal fixation method for fractures, especially for long bones of the lower limbs such as the femur and tibia. During the installation of the intramedullary nail, the steps of proximal opening, long bone shaft medullary expansion, intramedullary nail implantation, proximal locking nail installation and distal locking nail installation are usually required. The most difficult part of the operation is the installation of the distal locking nail. Due to the difference in the arc shape of the patient's long bones, the distal end of the intramedullary nail will have different degrees of deviation. The most commonly used technique in clinical practice is to use a lateral pressure rod to eliminate the difference in the front and back directions of the intramedullary nail in the medullary cavity to achieve the purpose of aiming. In the existing scheme, the distal aiming arm is all of an integrated design. Once the lateral pressure rod fails to fine-tune the distal end of the intramedullary nail to the predetermined position during the operation, the locking nail installation hole at the distal end of the distal aiming arm and the locking nail hole of the intramedullary nail in the patient's body will not be in a straight line. According to the expected surgical steps, the installation of the distal locking nail will encounter difficulties. At this time, the integrated distal aiming arm used in the existing technology lacks the ability to fine-tune itself, which brings challenges to the surgeon during the operation. In addition, the adjustment mechanism of the lateral support requires the addition of an additional lateral hole on the patient's affected limb bone, which is only used to adjust the anteroposterior position of the intramedullary nail to achieve the aiming function. This lateral hole will cause additional trauma to the patient, and multiple holes in a certain area of ​​the distal femur will increase the risk of secondary fracture in this area. Summary of the invention

[0003] The purpose of the present invention is to provide an aiming module, an intramedullary nail aiming arm and an intramedullary nail aiming device, so as to reduce the number of X-ray fluoroscopy during surgery, and do not need to add additional positioning holes on the patient's affected limb bones, thereby reducing trauma to the patient and reducing the pressure on the doctor's independent fine-tuning.

[0004] In order to solve the above technical problems, an embodiment of the present invention provides an intramedullary nail aiming arm, comprising:

[0005] A gear lever, the gear lever having a distal end and a proximal end; the direction from the distal end to the proximal end of the gear lever is the length direction of the gear lever;

[0006] A targeting module, the targeting module comprising:

[0007] A first aiming member, the first aiming member comprising: a first aiming body connected to the distal end of the gear lever, and an adjusting block movably connected to the first aiming body; the first aiming body is provided with a first guide groove penetrating along the thickness direction thereof, and the first guide groove extends along the height direction of the first aiming body; the adjusting block is provided with a guide hole, the aperture of the guide hole is smaller than the groove length of the first guide groove, and the guide hole can be configured to overlap and penetrate any area in the length direction of the first guide groove; the guide hole and the area of ​​the first guide groove covered by the guide hole form a first hole position; the height direction of the first aiming body, the length direction of the gear lever and the thickness direction of the first aiming body are perpendicular to each other; and

[0008] a second aiming member, wherein the second aiming member is slidably connected to the first aiming body along a height direction of the first aiming body, and the first aiming body is located between the gear lever and the second aiming member; a second guide groove is formed on the second aiming member and penetrates along a thickness direction thereof; the second guide groove has a plurality of second holes arranged along a length direction of the gear lever;

[0009] The second aiming member has an initial position and an aiming position; when the second aiming member is at the aiming position, the center of the second hole position and the center of any of the first hole positions are located on the same horizontal line, and the first aiming body and the second aiming member are locked and fixed.

[0010] In one embodiment, the adjustment block at least partially covers the first guide groove, is slidably connected to the first aiming body along a height direction of the first aiming body, and at least partially covers the first guide groove.

[0011] In one embodiment, the adjustment block comprises: a block body having the guide hole, and a guide rod movably connected to the block body; the guide rod is threadedly connected to the first aiming body.

[0012] In one embodiment, the diameter of the guide hole ranges from 7 mm to 11 mm.

[0013] In one embodiment, the first guide groove has a length ranging from 14 mm to 16 mm.

[0014] In one embodiment, the first guide groove has a groove width ranging from 7 mm to 11 mm.

[0015] In one embodiment, the first aiming body is provided with an aiming mark position and an initial mark position, and one aiming mark position corresponds to the center of one first hole position;

[0016] The second aiming member is provided with a pointing mark, and the pointing mark and the center of the second hole position are located on the same horizontal line; the pointing mark is used to point to the initial mark position when the second aiming member is located at the initial position, and is also used to point to the aiming mark position when the second aiming member moves to the aiming position.

[0017] In one embodiment, an adjustment mark is provided on the adjustment block; a hollow groove is provided on the first aiming body, and the adjustment mark is at least partially located in the hollow groove area;

[0018] The adjustment marking piece is used to point to the aiming marking position or the initial marking position when the adjustment block moves.

[0019] In one embodiment, the first aiming body is provided with a plurality of limiting grooves arranged along the height direction of the first aiming body; one of the first hole positions corresponds to one of the limiting grooves, and the area of ​​the first aiming body corresponding to the initial position of the second aiming member has the limiting groove;

[0020] The second aiming member is provided with a slide groove extending along the height direction thereof;

[0021] The aiming module further comprises: a locking member for locking or releasing the first aiming body and the second aiming member;

[0022] The lock comprises:

[0023] A movable rod, which is slidably disposed in the slide groove and is at least partially located outside the second aiming member; an unlocking groove is provided on the movable rod;

[0024] An elastic member, wherein the elastic member is arranged in the slide groove, and one end of the elastic member abuts against the bottom of the movable rod;

[0025] A limiting member, wherein the limiting member is arranged on the second aiming member; the limiting member is used to be embedded in any one of the limiting grooves; when the movable rod slides to the unlocking position, the limiting member is embedded in the unlocking groove, and the second aiming member is unlocked from the first aiming body; when the movable rod slides to the locking position, the limiting member is embedded in the limiting groove and is located outside the unlocking groove and abuts against the side wall of the movable rod, and the second aiming member is locked and fixed to the first aiming body.

[0026] In one embodiment, the second guide groove includes a plurality of circular holes, one circular hole forms one second hole position; and the second guide groove is in a horizontal “∞” shape.

[0027] An embodiment of the present invention further provides an intramedullary nail aiming device, comprising:

[0028] an intramedullary nail aiming arm as described above;

[0029] A handle is connected to the intramedullary nail aiming arm.

[0030] An embodiment of the present invention further provides an aiming module of an intramedullary nail aiming arm, wherein the aiming module is the aiming module in the intramedullary nail aiming arm mentioned above.

[0031] Compared with the prior art, the embodiment of the present invention is characterized in that the aiming module is provided, and the second aiming member is movably connected to the first aiming member, so that the height of the second aiming member can be adjusted. That is to say, after the intramedullary nail aiming arm is installed, the second aiming member is in the initial position, and a pre-judgment hole is first punched on the bone of the affected limb through the second hole position to form a pre-judgment hole, and a plurality of first hole positions are formed through the adjustment block according to the expected upward or downward direction of the pre-judgment hole and the locking screw hole at the distal end of the intramedullary nail, and a suitable first hole position is selected to drill a hole on the bone of the affected limb to form a pre-drilled hole, and when the pre-drilled hole is connected to the screw hole on the intramedullary nail, the pre-drilled hole is expanded to form a locking hole, and then the second aiming member is moved to the aiming position, so that the center of the second hole position is on the same horizontal line as the center of the first hole position forming the locking screw hole, so that the distal hole position in the locking of the intramedullary nail can be fine-tuned, the number of intraoperative X-ray fluoroscopy can be reduced, and no additional positioning holes need to be added on the bone of the patient's affected limb, which reduces trauma to the patient and reduces the pressure of the doctor's self-adjustment. The first aiming member and the second aiming member are unlocked by pressing the movable rod, and the second aiming member is moved. The first aiming member and the second aiming member are locked by releasing the movable rod, thereby facilitating adjustment and further reducing the operation time. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0033] Figure 1 is a schematic structural diagram of the installation of an intramedullary nail aimer and an intramedullary nail according to a first embodiment of the present invention;

[0034] Figure 2 is a schematic structural diagram of an intramedullary nail aiming device according to a first embodiment of the present invention;

[0035] Figure 3 is a schematic structural diagram of a second aiming member located at an aiming position according to a first embodiment of the present invention;

[0036] Figure 4 is a schematic structural diagram of a second aiming member in an initial position according to a first embodiment of the present invention;

[0037] Figure 5is a structural schematic diagram of another aiming module in the first embodiment of the present invention where the second aiming member is in an initial position;

[0038] Figure 6 is a cross-sectional view of a sighting module connected to a shift lever according to a first embodiment of the present invention;

[0039] Figure 7 is a schematic structural diagram of an intramedullary nail aiming device according to a second embodiment of the present invention;

[0040] Figure 8 is a schematic structural diagram of a second aiming member in an initial position according to a second embodiment of the present invention;

[0041] Fig. 9 is a cross-sectional view of a targeting module according to a second embodiment of the present invention.

[0042] Among them, 100, intramedullary nail aiming arm; 1, gear lever; 11, hole position; 2, aiming module; 700, handle; 21, first aiming member; 22, second aiming member; 210, first guide groove; 211, first hole position; 220, second guide groove; 221, second hole position; 212, aiming mark position; 213, initial mark position; 222, pointing mark; 3, locking member; 31, movable rod; 310, unlocking groove; 32, elastic member; 33, limiting member; 214, limiting groove; 500, intramedullary nail; 4, aiming module; 411, first hole position; 421, The second hole position; 300, intramedullary nail aiming arm; 5, aiming module; 51, first aiming piece; 511, first aiming body; 512, adjusting block; 5110, first guide groove; 510, first hole position; 5120, guide hole; 5121, adjusting marking piece; 5111, hollow groove; 5112, aiming mark position; 5113, initial marking position; 52, second aiming piece; 521, second hole position; 522, pointing mark; 7, locking piece; 8, locking connector; 5122, block; 5123, guide rod; 5114, limiting groove; 6, locking connector. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the following will be described in detail with reference to the accompanying drawings. However, it will be appreciated by those skilled in the art that in the various embodiments of the present invention, many technical details are provided in order to enable the reader to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical scheme claimed in the present application can be implemented.

[0044] In the following description, certain specific details are set forth for the purpose of illustrating various disclosed embodiments to provide a thorough understanding of the various disclosed embodiments. However, those skilled in the relevant art will recognize that the embodiments may be practiced without one or more of these specific details. In other cases, well-known devices, structures, and techniques associated with the present application may not be shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.

[0045] Unless the context requires otherwise, throughout the specification and claims, the word "comprise" and variations such as "include" and "have" should be construed in an open, inclusive sense, ie, should be interpreted as "including, but not limited to."

[0046] The following will be described in detail with reference to the accompanying drawings to provide a clearer understanding of the purpose, features and advantages of the present invention. It should be understood that the embodiments shown in the accompanying drawings are not intended to limit the scope of the present invention, but are only intended to illustrate the essential spirit of the technical solution of the present invention.

[0047] References throughout the specification to "one embodiment" or "an embodiment" indicate that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of "in one embodiment" or "in an embodiment" in various places throughout the specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any manner in one or more embodiments.

[0048] As used in this specification and the appended claims, the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. It should be noted that the term "or" is generally employed in its sense including "and / or" unless the context clearly dictates otherwise.

[0049] In the following description, in order to clearly show the structure and working mode of the present invention, many directional words will be used for description, but the words "front", "back", "left", "right", "outside", "inside", "outward", "inward", "up", "down", etc. should be understood as convenient terms and should not be understood as restrictive terms.

[0050] Embodiments of the present invention are described below with reference to the accompanying drawings.

[0051] The first embodiment of the present invention relates to an intramedullary nail aiming arm 100. Figure 1 , Figure 2 and Figure 3As shown, the intramedullary nail aiming arm 100 includes: a gear lever 1 and an aiming module 2. The gear lever 1 is made of stainless steel or carbon fiber material. The gear lever 1 has a plurality of holes 11 arranged along its length direction, which correspond to the intramedullary nails of different length specifications. The gear lever 1 has a distal end and a proximal end. The proximal end is connected to the handle 700, and the distal end is connected to the aiming module 2. The direction from the distal end to the proximal end of the gear lever 1 is the length direction of the gear lever 1. The aiming module 2 includes: a first aiming member 21 and a second aiming member 22. The first aiming member 21 is connected to the distal end of the gear lever 1, and a first guide groove 210 is provided on the first aiming member 21 that penetrates along its thickness direction. The first guide groove 210 has a plurality of first holes 211 arranged along the height direction of the first aiming member 21. The height direction of the first aiming member 21, the length direction of the gear lever 1, and the thickness direction of the first aiming member 21 are perpendicular to each other. The thickness direction, i.e. Figure 2 The direction of the arrow Z in the middle is the height direction. Figure 2 The direction of the arrow Y, length direction Figure 2 The second aiming member 22 is slidably connected to the first aiming member 21 along the height direction of the first aiming member 21, and the first aiming member 21 is located between the gear lever 1 and the second aiming member 22. The second aiming member 22 is provided with a second guide groove 220 penetrating along the thickness direction thereof, and the second guide groove 220 has a second hole position 221. The second aiming member 22 has an initial position and an aiming position. When the second aiming member 22 is located at the aiming position, the center of the second hole position 221 is located on the same horizontal line as the center of any first hole position 211, and the first aiming member 21 and the second aiming member 22 are locked and fixed.

[0052] Since the aiming module 2 is provided, and the second aiming member 22 is movably connected to the first aiming member 21, the height of the second aiming member 22 can be adjusted. That is, after the intramedullary nail aiming arm 100 is installed, the second aiming member 22 is in the initial position, and a pre-judged hole is first punched on the bone of the affected limb through the second hole position 221 to form a pre-judged hole. According to the expected upward or downward direction of the pre-judged hole and the locking screw hole at the distal end of the intramedullary nail 500, a suitable first hole position 211 is selected to drill a hole on the bone of the affected limb to form a pre-drilled hole. When the pre-drilled hole is connected to the screw hole on the intramedullary nail 500, the pre-drilled hole is expanded to form a locking hole, and then the second aiming member 22 is moved to the aiming position, so that the center of the second hole position 221 is on the same horizontal line as the center of the first hole position 211 forming the locking screw hole, so that the distal hole position of the intramedullary nail 500 can be fine-tuned during locking, reducing the number of X-ray fluoroscopy during surgery, and no additional positioning holes need to be added on the bone of the patient's affected limb, reducing trauma to the patient, and reducing the pressure of the doctor's self-adjustment.

[0053] Furthermore, the first guide groove 210 includes a plurality of circular holes, one circular hole forms a first hole position 211 , and the hole centers of the plurality of circular holes are arranged along the height direction of the first aiming member 21 .

[0054] Furthermore, the first guide groove 210 is in a vertical "8" shape. Figure 4 In the embodiment, two adjacent circular holes are connected, and in another embodiment, the two circular holes may not be connected.

[0055] In addition, if Figure 4 As shown, the distance between the centers of two adjacent first hole positions 211 ranges from 9 mm to 11 mm, and optionally, the distance between the centers of two adjacent first hole positions 211 can be 10 mm, etc. Therefore, if a first hole position 211 is selected and is not suitable for drilling a hole in the affected limb bone, another suitable first hole position 211 is selected to drill and expand the hole in the affected limb bone, and the hole formed can be expanded to the hole drilled on the affected limb bone for the first time, without causing excessive damage to the affected limb bone.

[0056] Further, the diameter of the circular hole in the first guide groove 210 ranges from 7 mm to 11 mm. Optionally, the distance between the centers of two adjacent first hole positions 211 may be 8 mm or 10 mm.

[0057] In addition, if Figure 2 and Figure 4 As shown, there are multiple second holes 221 , which are arranged along the length direction of the shift lever 1 .

[0058] Furthermore, if Figure 2 and Figure 4 As shown, the second guide groove 220 includes a plurality of circular holes arranged along the length direction of the gear lever. Preferably, one circular hole forms a second hole position 221. The second guide groove 220 is in the shape of a horizontal "∞". The second aiming piece is provided with a horizontal "∞" hole to support the requirement of using two holes at the same time, that is, when using the second guide groove 220, the second hole position on one side is used as a reference hole, and the second hole position on the other side can be directly used as a locking nail installation hole when fine-tuning is not required. Finally, the locking nail installation and positioning reference holes are separated to avoid secondary expansion of the reference hole and increase the risk of fracture in the punching area. Specifically, the clinical requirement is that the distal locking nail installation hole of the intramedullary nail is a long slot keyway hole. The locking nail is preferentially installed at the remote side of the keyway during the initial surgery to prevent delayed bone healing in patients after surgery. The locking nail needs to have a certain sliding gap in the keyway to achieve secondary pressurization and promote bone healing. During surgery, the pre-drilled reference hole is preferentially punched on the other side of the keyway hole, that is, when using Figure 1 The first hole on the right side of the middle horizontal "∞" hole structure is used to fine-tune the aiming module according to the position of the reference hole. After the fine-tuning is completed, the second hole near the outer side (far end) is used to drill the locking nail installation hole through the horizontal "∞" hole structure, that is, Figure 1The leftmost second hole position is independent of each other. When the patient is standing, the second holes are not on the same horizontal plane, which minimizes the loss of bone strength. However, the existing second hole position generally has only one single hole, and the pre-drilled reference hole position and the final locking screw installation hole are not effectively separated.

[0059] In addition, if Figure 2 , Figure 3 and Figure 4 As shown, the first aiming member 21 is provided with an aiming mark position 212 and an initial mark position 213, and one aiming mark position 212 corresponds to the center of one first hole position 211. The aiming mark position 212 and the initial mark position 213 can be scale lines, and the second aiming member 22 is provided with a pointing mark 222, and the pointing mark 222 can be "△", and the pointing mark 222 and the center of the second hole position 221 are located on the same horizontal line, and the pointing mark 222 is used to point to the initial mark position 213 when the second aiming member 22 is located at the initial position, and is also used to point to the aiming mark position 212 when the second aiming member 22 moves to the aiming position.

[0060] Specifically, Figure 4For example, the center line of the horizontal "∞" hole is marked with "△", and the symmetric center of the module where the vertical "8" hole is located and the center line of the two circular holes are provided with corresponding scale lines, that is, three scale lines, wherein the scale line of the symmetric center of the module where the vertical "8" hole is located is the initial marking position 213, and the scale lines corresponding to the center lines of the two circular holes are the aiming marking positions 212. In this embodiment, the symmetric center of the module where the vertical "8" hole is located may be the center of the vertical "8" hole. In another embodiment, the vertical "8" hole is above the center of the module where it is located, and at this time, the symmetric center of the module where the vertical "8" hole is located is not on the same horizontal line as the center of the vertical "8" hole. Of course, the scale line as the initial marking position 213 may also not be at the symmetric center of the module where the vertical "8" hole is located. The positions where "△" is aligned with the three scale lines are three positions that support immediate locking. When "△" is aligned with the scale lines on both sides, the positional relationship between the two groups of holes is: the center line of the horizontal "∞" hole and the center of the vertical "8" hole are on the same straight line. In use, when the intramedullary nail aiming arm 100 is installed on the patient's affected limb bone, the second aiming member 22 is in the initial position in the initial state, that is, the pointing mark 222 is aligned with the initial mark position 213. Follow the following steps: first, drill a hole in the horizontal "∞" hole at the end of the second aiming piece 22, which is a pre-judgment hole, take an X-ray along the sagittal position of the affected limb, and check whether the locking screw hole at the distal end of the intramedullary nail 500 is in the expected upward or downward direction; second, select a first hole position 211 in the first aiming piece 21, first use a 2.5mm drill bit to pass through the first hole position 211 to drill a hole in the patient's affected limb bone to form a pre-drilled hole, and check that the 2.5mm drill bit passes smoothly through the screw hole on the intramedullary nail 500, then use a step drill to expand the hole to the expected diameter of 4-4.5mm, and complete the installation of the locking screw in the vertical "8" hole; third, adjust the center line of the horizontal "∞" hole at the distal end of the second aiming piece 22 and the center of the first hole position 211 drilled by the drill bit in the second step to be in the same straight line, such as Figure 3 Then, follow the steps of pre-drilling, hole enlarging, and finally installing the locking screw to complete the installation of the second locking screw at the distal end.

[0061] Furthermore, if Figure 6 As shown, the first aiming member 21 is detachably connected to the gear lever 1. Specifically, a dovetail groove can be provided at the distal end of the gear lever 1, and a dovetail groove protrusion structure is provided on the first aiming member 21, which can be inserted into the groove and locked by a locking connector to facilitate detachable connection. It can be understood that the detachable connection structure is not limited to this, and other structures are also possible. In other embodiments, the first aiming member 21 can also be fixedly connected to the gear lever 1, and the two are an integral part and cannot be detached.

[0062] like Figure 6As shown, in order to quickly adjust the height of the second aiming member 22 and fix the second aiming member 22 to the first aiming member 21, the aiming module 2 also includes: a lock 3 for locking or releasing the first aiming member 21 and the second aiming member 22. The first aiming member 21 is provided with a plurality of limit grooves 214 arranged along the height direction of the first aiming member 21, one first hole position 211 corresponds to one limit groove 214, and the area of ​​the first aiming member 21 corresponding to the initial position of the second aiming member 22 has a limit groove 214. The second aiming member 22 is provided with a slide groove extending along its height direction. The lock 3 includes: a movable rod 31, an elastic member 32 and a limit member 33. The movable rod 31 is slidably arranged in the slide groove, and at least partially located outside the second aiming member 22. An unlocking groove 310 is provided on the movable rod 31. The elastic member 32 is arranged in the slide groove, and one end of the elastic member 32 is against the bottom of the movable rod 31. The limit member 33 is arranged on the second aiming member 22, and the limit member 33 is used to be embedded in any one of the limit slots 214. When the movable rod 31 is pressed to slide to the unlocking position, the limit member 33 is aligned with the unlocking slot 310, and the second aiming member 22 can be moved at this time, and the second aiming member 22 drives the limit member 33 to move, and the side wall of the first aiming member pushes the limit member 33 to enter more into the unlocking slot, and the second aiming member 22 is unlocked from the first aiming member 21. When the second aiming member 22 drives the limit member to move into place, the limit member 33 is aligned with the appropriate limit slot 214, and the movable rod 31 is released. The movable rod 31 is pushed by the elastic member 32 to slide to the locking position, and the limit member 33 is pushed by the movable rod 31 to be embedded in the limit slot 214 and is located outside the unlocking slot 310 and abuts against the side wall of the movable rod 31, and the second aiming member 22 is locked and fixed with the first aiming member 21. Specifically, in this embodiment, if Figure 6There are three middle limiting grooves 214, which correspond to the centers of the two second hole positions 221 and the symmetric center of the module where the vertical "8" hole is located (the symmetric center of the first aiming member 21). When the second aiming member 22 is located at the initial position and is positioned and fixed with the first aiming member 21, the second aiming member 22 aligns the limiting member 33 with the limiting groove 214 at the symmetric center of the first aiming member 21, and the side wall of the movable rod 31 pushes the limiting member 33 to be inserted into the limiting groove 214. In this state, the second aiming member 22 is located at the initial position and is locked with the first aiming member 21. When unlocking is required, press the movable rod 31 to align the limiting member 33 with the unlocking groove 310, and slightly move the second aiming member 22. The limiting member 33 is pushed into the unlocking groove by the side wall of the first aiming member, so that the first aiming member 21 and the second aiming member 22 can move flexibly, and move the second aiming member 22 to the position to be moved. Release the movable rod 31, and the elastic member 32 can be a spring or a spring sheet to push the movable rod 31 to let the limit member 33 slide out of the unlocking groove 310, and the freedom of the first aiming member 21 and the second aiming member 22 in the sliding direction is limited, so that locking is achieved. In order to facilitate, the limit member 33 is a spherical member as a whole or the surface inserted into the unlocking groove 310 and the limit groove 214 is a rounded surface. Through this structural design, the first aiming member 21 and the second aiming member 22 can be locked, which is convenient for operation. In addition, in order to facilitate the sliding of the second aiming member 22 relative to the first aiming member 21, a notch is set at the far end of the first aiming member 21, and a protruding block is set at the proximal end of the second aiming member 22 embedded in the notch. The matching sliding structure of the first aiming member 21 and the second aiming member 22 can be a dovetail groove structure, which is the same as the matching structure of the first aiming member 21 and the gear lever 1. Through the cooperation of the movable rod and the elastic member, the movable rod is pressed to achieve unlocking, and the movable rod is released to achieve locking. The overall adjustment structure is simple and convenient, and the operation time is reduced.

[0063] The locking connector 6 for locking the first aiming member 21 and the shift lever 1 is substantially the same in structure as the locking member 3 for locking the first aiming member 21 and the second aiming member 22. Unlocking is achieved by pressing, thereby facilitating disassembly and saving surgical time. The locking of the first aiming member 21 and the shift lever 1 has only one shift position, and a limit groove is provided on the shift lever 1. The structures of other movable rods, elastic members and limit members are the same as those described above and will not be elaborated on herein.

[0064] In other embodiments, the instant locking structure between the first aiming member and the second aiming member, and between the first aiming member and the shift lever may be of other types, or the module where the movable lever is located may be different from that in the present embodiment.

[0065] Furthermore, the aiming module has multiple aiming modules, and the heights of the first holes in different aiming modules are different. When multiple aiming modules are set, when the first hole is locked with the distal hole of the intramedullary nail during surgery, if the first hole on one aiming module does not correspond to the distal hole of the intramedullary nail, another type of aiming module can be immediately replaced. It is only necessary to exchange the modules in a certain order, and the learning curve is short, so as to shorten the operation time and reduce the risk of wound infection.

[0066] Further, when the second aiming member 22 is at the initial position, the distance between the center of the first hole position 211 and the center of the second hole position 221 in each aiming module along the height direction of the first aiming member 21 is the aiming hole distance. One aiming module has at least two aiming hole distances, and at least two aiming hole distances of at least one aiming module in the plurality of aiming modules are the same. Two adjacent aiming hole distances of at least one aiming module in the plurality of aiming modules are not the same. Specifically, taking two interchangeable aiming modules as an example, Figure 4 As shown, the aiming hole distances h1 and h2 in an aiming module 2 are the same, both being 4.5 mm; Figure 5 As shown, the aiming hole distances h3 and h4 in another aiming module 4 are different, namely 3 mm and 6 mm respectively. At this time, in the aiming modules of the same size, the first guide grooves 210 have the same shape and size but different position heights in the aiming modules. During use, you can first use the aiming module 2 with an aiming hole distance of 4.5 mm, and follow the steps below. In the first step, install the aiming module 2 with an aiming hole distance of 4.5 mm on the gear lever 1, and drill a hole in the horizontal "∞" hole at the end of the second aiming piece 22. This hole is a pre-judgment hole. Take an X-ray along the sagittal position of the affected limb to check whether the locking nail hole at the distal end of the intramedullary nail 500 is in the expected upward or downward direction; in the second step, select a first hole position 211 in the first aiming piece 21, first use a 2.5mm drill bit to pass through the first hole position 211 to drill a hole in the patient's affected limb bone to form a pre-drilled hole, and check whether the 2.5mm drill bit can pass through the screw hole on the intramedullary nail 500 smoothly. If it passes through smoothly, there is no need to change another aiming module 4, but follow the aiming module usage steps described above. However, if the 2.5mm drill bit does not pass through the screw hole on the intramedullary nail 500, it is necessary to enable another model of aiming module at this time, and use its aiming hole distance to achieve fine adjustment, press the locking connector, and unlock the aiming hole distance of 4.5 The combination of the mm aiming module and the gear lever 1 will Figure 5Another aiming module 4 is quickly connected to the gear lever 1 in the same manner, and the locking connector is released to form an intramedullary nail aiming arm with a new position relationship. At this time, the use of the first hole position 411 and the second hole position 421 on the aiming module 4 directly jumps to the second step (the first step is to drill a hole in the second hole position 221 of the horizontal "∞" hole. This hole is a pre-judgment hole. Check whether the intramedullary nail 500 is in the expected upward or downward direction. The aiming hole spacing is 4.5 mm aiming module 2 is completed); that is, directly select the appropriate first hole position 411 in the vertical "8" hole of the newly replaced aiming module 4, first pre-drill with a 2.5mm drill bit, check that it passes smoothly through the screw hole on the intramedullary nail 500, and then use a step drill to expand the hole to the expected diameter of 4mm-4.5mm, and complete the installation of the locking screw in the vertical "8" hole; the third step is to press the locking piece, adjust the center line of the distal second hole position 421 and the center of the first hole position 411 of the locking nail installed in the second step to be on the same straight line, and then follow the steps of pre-drilling, expanding the hole, and then installing the locking screw to complete the installation of the distal second locking screw. In this embodiment, two models of aiming modules are taken as an example, and the aiming module can also have more models. According to the implementation requirements, the appropriate model can be replaced during the operation. The above-mentioned various dimensional data can also be replaced according to actual needs, and are not limited to this.

[0067] Furthermore, if Figure 4 The distances h1 and h2 between the two identical aiming holes in the aiming module 2 range from 4.5 mm to 5.5 mm. Figure 5 The ranges of the distances h3 and h4 of the two adjacent different aiming holes in the middle aiming module 4 are 3mm-4mm and 6mm-7mm respectively. Optionally, the distances h3 and h4 of the two different aiming holes can be a combination of 3mm and 6mm, or a combination of 4mm and 5mm respectively. Therefore, if the first hole position 211 in one aiming module is not suitable for drilling a hole in the affected limb bone, the hole formed after drilling and expanding the hole in the affected limb bone in another suitable aiming module can be expanded to the hole drilled on the affected limb bone for the first time, and no excessive damage will be caused to the affected limb bone.

[0068] When an aiming module has at least two aiming hole distances, the aiming module supports flipping 180° for use. The flipping process is the operation of switching the eccentric distance. For example, in the vertical "8" hole, the offset distances between the two holes and the center are different. For example, the offset distances between the upper and lower holes and the center are 6mm and 4mm respectively. After flipping 180°, the offset distances between the upper and lower holes and the center are converted to 4mm and 6mm, which can quickly achieve aiming adjustment and have better clinical value.

[0069] The intramedullary nail aiming arm in this embodiment has a simple structure and a reduced number of components, and the installation steps of the lateral bracket in the existing equipment are omitted, which saves the doctor's operation time. In addition, there is no need to drill the lateral pressure rod hole on the patient's femur during the operation, which reduces the trauma to the affected limb bone and reduces the risk of secondary fracture in the distal femoral locking nail installation area. The second aiming piece is designed with a specific offset distance, and the offset adjustment of the aiming hole can be quickly realized during the operation, which saves the operation of active fine-tuning during the operation and effectively reduces the number of X-rays for doctors and patients.

[0070] The second embodiment of the present invention relates to an intramedullary nail aiming arm 300. The second embodiment is substantially the same as the first embodiment, except that the structure of the first aiming member 51 in the second embodiment is different from that in the first embodiment. Figure 7 and Figure 8 As shown in this embodiment, the aiming module 5 includes: a first aiming member 51 and a second aiming member 52. However, the first aiming member 51 includes: a first aiming body 511 connected to the distal end of the gear lever, and an adjusting block 512 movably connected to the first aiming body 511. The first aiming body 511 is provided with a first guide groove 5110 penetrating along the thickness direction thereof, and the first guide groove 5110 extends along the height direction of the first aiming body 511. The adjusting block 512 is provided with a guide hole 5120, the aperture of the guide hole 5120 is smaller than the groove length of the first guide groove 5110, and the guide hole 5120 can be configured to overlap and penetrate any area in the length direction of the first guide groove 5110, and the guide hole 5120 and the area of ​​the first guide groove 5110 covered by the guide hole 5120 form a first hole position 510. The height direction of the first aiming body 511, the length direction of the gear lever and the thickness direction of the first aiming body 511 are perpendicular to each other. The height direction of the first aiming body 511 is the height direction of the first aiming member 51, the height direction of the second aiming member 52, and the height direction of the gear lever. The structure of the second aiming member 52 is the same as that of the above embodiment, and will not be repeated here.

[0071] Since the aiming module is provided, and the second aiming member is movably connected to the first aiming member, the height of the second aiming member can be adjusted. That is to say, after the intramedullary nail aiming arm is installed, the second aiming member is in the initial position, and a pre-judgment hole is first punched on the bone of the affected limb through the second hole position to form a pre-judgment hole. According to the expected upward or downward direction of the pre-judgment hole and the locking screw hole at the distal end of the intramedullary nail, a plurality of first hole positions are formed through the adjustment block, and a suitable first hole position is selected to drill a hole on the bone of the affected limb to form a pre-drilled hole. When the pre-drilled hole is connected to the screw hole on the intramedullary nail, the pre-drilled hole is expanded to form a locking hole, and then the second aiming member is moved to the aiming position, so that the center of the second hole position is on the same horizontal line as the center of the first hole position forming the locking screw hole, thereby realizing the fine adjustment of the distal hole position in the locking of the intramedullary nail, reducing the number of X-ray fluoroscopy during the operation, and no additional positioning holes are added to the bone of the patient's affected limb, reducing trauma to the patient, and reducing the pressure of the doctor's self-adjustment.

[0072] The intramedullary nail aiming arm in this embodiment has a simple structure and a reduced number of components, and the installation steps of the lateral bracket in the existing equipment are omitted, which saves the doctor's operation time. In addition, there is no need to drill the lateral pressure rod hole on the patient's femur during the operation, which reduces the trauma to the affected limb bone and reduces the risk of secondary fracture in the distal femoral locking nail installation area. The second aiming piece is designed with a specific offset distance, and the offset adjustment of the aiming hole can be quickly realized during the operation, which saves the operation of active fine-tuning during the operation and effectively reduces the number of X-rays for doctors and patients.

[0073] Furthermore, if Figure 8 , Fig. 9 As shown, the adjustment block 512 at least partially covers the first guide groove 5110 , is slidably connected to the first aiming body 511 along the height direction of the first aiming body 511 , and at least partially covers the first guide groove 5110 .

[0074] In addition, if Figure 8 , Fig. 9 As shown, the adjustment block 512 includes: a block 5122 with a guide hole 5120, and a guide rod 5123 movably connected to the block 5122. The guide rod 5123 is threadedly connected to the first aiming body 511. When the guide rod 5123 rotates in coordination with the first aiming body 511, the guide rod 5123 moves toward the first guide groove 5110, thereby pushing the block 5122 to move along the height direction of the first aiming body 511; when the guide rod 5123 rotates in the opposite direction, the guide rod 5123 moves toward the direction of rotating out of the first guide groove 5110, and drives the block 5122 to move, thereby changing the height of the guide hole 5120 on the first aiming body 511. The guide rod 5123 is movably connected to the block 5122, so that the rotation of the guide rod 5123 will not drive the block 5122 to rotate. In addition, the block 5122 is embedded in the first aiming body 511, abuts against the first aiming body 511, and is driven to move by the guide rod 5123.

[0075] like Figure 8 , Fig. 9 As shown, the guide hole 5120 covers the area of ​​the first guide groove 5110 to form the first hole position 510. In this embodiment, the guide hole 5120 is a round hole, and the diameter of the guide hole 5120 is the same as the groove width of the guide groove. The dimension of the guide groove extending along the length direction of the gear lever is the groove width. The diameter range of the guide hole 5120 is 7mm-11mm, and the groove width range of the first guide groove 5110 is 7mm-11mm, that is, the size of the first hole position 510 in the above embodiment. In other embodiments, the groove width of the first guide groove 5110 may be different from the diameter of the guide hole 5120, and the hole formed by the guide hole 5120 covering the first guide groove 5110 is the first hole position 510. At this time, the diameter of the guide hole 5120 can be any value between 7mm-11mm, such as 10mm, 9mm or 8mm, and the width of the first guide groove 5110 is the same. The guide hole 5120 is not necessarily circular, and the first hole position 510 is not necessarily circular, and it is set according to actual conditions.

[0076] like Figure 8 , Fig. 9 As shown, the length of the first guide groove 5110 ranges from 14 mm to 16 mm, and the optional length of the first guide groove 5110 ranges from 15 mm to 15.5 mm. The length of the first guide groove 5110 is the length extending along the height direction of the first aiming body 511.

[0077] In this example, if Figure 7 , Figure 8 As shown, the aiming mark position 5112 and the initial mark position 5113 are set on the first aiming body 511. It can be understood that in this embodiment, the initial mark position 5113 can be set on the center line of the first guide groove 5110 along the height direction, there are multiple aiming mark positions 5112, which can be divided above or below the initial mark position 5113, and the position of the adjustment member is moved to form the first hole position, and the center of each first hole position points to the aiming mark position 5112, so that when adjusting the second aiming member, the pointing mark 522 can be directly pointed to the corresponding aiming mark position 5112 to achieve that the centers of the first hole position 510 and the second hole position 521 are on the same horizontal line. See the description in the above embodiment for details, which will not be repeated here.

[0078] In addition, if Fig. 9 As shown, the limiting groove 5114 is also provided on the first aiming body 511 , and the cooperation between the locking member 7 and the limiting groove 5114 is as described in the above embodiment, and the details are described in the above embodiment, which will not be repeated here.

[0079] In addition, the first aiming body 511 is connected to the shift lever 1 via a locking connector 8, which facilitates fast locking or removal of the first aiming body 511 and the shift lever 1. This structure is the same as that in the first embodiment and will not be described in detail.

[0080] Further, if Figure 7 , Figure 8 As shown, an adjustment mark 5121 is provided on the adjustment block 512. The adjustment mark 5121 is provided on the block body 5122, and a hollow groove 5111 is provided on the first aiming body 511. The adjustment mark 5121 is at least partially located in the hollow groove 5111 area. The adjustment mark 5121 is used to point to the aiming mark position 5112 or the initial mark position 5113 when the adjustment block 512 moves. Specifically, when it is necessary to place the first hole position 510 at the aiming position, the adjustment block 512 can be moved to make the adjustment mark 5121 point to the aiming mark position 5112, and the adjustment mark 5121 can be a triangular marking arrow. In this embodiment, there can be multiple aiming positions, which are arranged along the groove length direction of the first guide groove 5110, thereby forming multiple first hole positions 510. Specifically, during use, when a drill is used to pass through the first hole position 510 to form a pre-drilled hole in the bone of the patient's affected limb, if it is checked that the drill bit has successfully passed through the screw hole on the intramedullary nail, the hole will continue to be enlarged. However, if it is checked that the drill bit has not successfully passed through the screw hole on the intramedullary nail, the adjustment block 512 is moved to allow the adjustment marking piece 5121 to point to other aiming positions to form another first hole position 510, and the drill bit passes through the other first hole position 510 to drill a hole.

[0081] The aiming module 5 in this embodiment can be used independently or in conjunction with the aiming module in the above embodiment in the same operation. When the intramedullary nail aiming arm 300 only includes the aiming module 5 in this embodiment, that is, the aiming module 5 in this embodiment is used independently, the method of use is the same as the method of use of the intramedullary nail aiming arm 300 in the first embodiment. Figure 7 , Figure 8As shown, when the intramedullary nail aiming arm 300 is installed on the patient's affected limb bone, the second aiming member 52 is located at the initial position in the initial state, that is, the pointing mark 522 is aligned with the initial mark position 5113 . The following steps are followed: first, drill a hole in the horizontal "∞" hole at the end of the second aiming piece 52, i.e., the second hole position 521. This hole is a pre-judged hole. Take an X-ray along the sagittal position of the affected limb to check whether the locking screw hole at the distal end of the intramedullary nail is in the expected upward or downward direction; second, select a first hole position 510 in the first aiming piece 51, first use a 2.5mm drill bit to drill a hole in the patient's affected limb bone through the first hole position 510 to form a pre-drilled hole, and check that the 2.5mm drill bit passes through the screw hole on the intramedullary nail smoothly, then use a step drill to expand the hole to the expected diameter of 4-4.5mm, and complete the installation of the locking screw in the first hole position 510; third, adjust the center line of the horizontal "∞" hole at the distal end of the second aiming piece 52 and the center of the first hole position 510 drilled by the drill bit in the second step to be in the same straight line, and then follow the steps of pre-drilling, expanding the hole, and finally installing the locking screw to complete the installation of the second locking screw at the distal end. However, if the selected first hole position 510 is found to be inappropriate, the adjustment block 512 needs to be moved to form a new first hole position 510, and the second and third steps above are repeated. The above drilling size can be adjusted according to implementation requirements.

[0082] The second aiming piece in this embodiment has a horizontal “∞” hole to support the need to use two holes at the same time, that is, when using the second guide slot, the second hole on one side is used as a reference hole, and the second hole on the other side can be directly used as a locking screw installation hole when fine-tuning is not required. Finally, the locking screw installation and positioning reference holes are separated to avoid secondary expansion of the reference hole and increase the risk of fracture in the punching area. Specifically, clinical requirements require that the distal locking screw installation hole of the intramedullary nail be a long slot-type keyway hole. During the initial surgery, the locking screw is preferentially installed at a position on the far side of the keyway to prevent delayed bone healing in patients after surgery. The locking screw needs to have a certain sliding gap in the keyway to achieve secondary pressurization and promote bone healing. During surgery, the pre-drilled reference hole is preferentially drilled on the other side of the keyway hole, that is, when using Figure 1 The first hole on the right side of the middle horizontal "∞" hole structure is used to fine-tune the aiming module according to the position of the reference hole. After the fine-tuning is completed, the second hole near the outer side (far end) is used to drill the locking nail installation hole through the horizontal "∞" hole structure, that is, Figure 1 The leftmost second hole position is independent of each other. When the patient is standing, the second holes are not on the same horizontal plane, and the bone strength loss is minimal. However, the existing second hole position generally has only one single hole, and the pre-drilled reference hole position and the final locking screw installation hole are not effectively separated. It is understandable that the number of second holes is not limited to this, and multiple second holes can also be set separately.

[0083] The intramedullary nail aiming arm in this embodiment has a simple structure and a reduced number of components, and the installation steps of the lateral bracket in the existing equipment are omitted, which saves the doctor's operation time. In addition, there is no need to drill the lateral pressure rod hole on the patient's femur during the operation, which reduces the trauma to the affected limb bone and reduces the risk of secondary fracture in the distal femoral locking nail installation area. The second aiming piece is designed with a specific offset distance, and the offset adjustment of the aiming hole can be quickly realized during the operation, which saves the operation of active fine-tuning during the operation and effectively reduces the number of X-rays for doctors and patients.

[0084] In the same operation, the aiming module in the above embodiment is used in conjunction with the aiming module. If the aiming module in the figure and the figure are not suitable, the aiming module of this embodiment is replaced and installed on the gear lever, and the second and third steps are repeated.

[0085] It is not difficult to find that the relevant technical details mentioned in the first embodiment are still valid in this embodiment, and in order to reduce repetition, they are not repeated here. Accordingly, the relevant technical details mentioned in this embodiment can also be applied in the first embodiment.

[0086] A third embodiment of the present invention relates to a targeting module, which is the targeting module in the first embodiment or the targeting module in the second embodiment.

[0087] The fourth embodiment of the present invention relates to an intramedullary nail aiming device, comprising the intramedullary nail aiming arm of the first embodiment or the second embodiment and a handle 700. The handle 700 is connected to the intramedullary nail aiming arm, either indirectly through an adjustable connecting rod or directly.

[0088] It is not difficult to find that this embodiment is a system embodiment corresponding to the first embodiment, and this embodiment can be implemented in conjunction with the first embodiment. The relevant technical details mentioned in the first embodiment are still valid in this embodiment, and in order to reduce repetition, they are not repeated here. Accordingly, the relevant technical details mentioned in this embodiment can also be applied in the first embodiment.

[0089] Preferred embodiments of the present invention have been described above in detail, but it should be understood that aspects of the embodiments can be modified, if necessary, to employ aspects, features and concepts of the various patents, applications and publications to provide further embodiments.

[0090] These and other changes can be made to the embodiments in light of the above detailed description.In general, in the claims, the terms used should not be considered limited to the specific embodiments disclosed in the specification and the claims, but should be construed to include all possible embodiments along with the full scope of equivalents to which these claims are entitled.

[0091] Those skilled in the art will appreciate that the above embodiments are specific embodiments for implementing the present invention, and that in actual applications, various changes may be made in form and detail without departing from the spirit and scope of the present invention.

Claims

1. An intramedullary nail aiming arm, characterized in that: include: A gear lever, the gear lever having a distal end and a proximal end; the direction from the distal end to the proximal end of the gear lever is the length direction of the gear lever; A targeting module, the targeting module comprising: A first aiming member, the first aiming member comprising: a first aiming body connected to the distal end of the gear lever, and an adjusting block movably connected to the first aiming body; the first aiming body is provided with a first guide groove penetrating along the thickness direction thereof, and the first guide groove extends along the height direction of the first aiming body; the adjusting block is provided with a guide hole, the aperture of the guide hole is smaller than the groove length of the first guide groove, and the guide hole can be configured to overlap and penetrate any area in the length direction of the first guide groove; the guide hole and the area of ​​the first guide groove covered by the guide hole form a first hole position; the height direction of the first aiming body, the length direction of the gear lever and the thickness direction of the first aiming body are perpendicular to each other; and a second aiming member, wherein the second aiming member is slidably connected to the first aiming body along a height direction of the first aiming body, and the first aiming body is located between the gear lever and the second aiming member; a second guide groove is formed on the second aiming member and penetrates along a thickness direction thereof; the second guide groove has a plurality of second holes arranged along a length direction of the gear lever; The second aiming member has an initial position and an aiming position; when the second aiming member is at the aiming position, the center of the second hole position and the center of any of the first hole positions are located on the same horizontal line, and the first aiming body and the second aiming member are locked and fixed.

2. The intramedullary nail aiming arm according to claim 1, characterized in that: The adjusting block at least partially covers the first guide groove, is slidably connected to the first aiming body along a height direction of the first aiming body, and at least partially covers the first guide groove.

3. The intramedullary nail aiming arm according to claim 1, characterized in that: The adjusting block comprises: a block body provided with the guide hole, and a guide rod movably connected to the block body; the guide rod is threadedly connected to the first aiming body.

4. The intramedullary nail aiming arm according to claim 1, characterized in that: The diameter of the guide hole ranges from 7 mm to 11 mm.

5. The intramedullary nail aiming arm according to claim 4, characterized in that: The first guide groove has a groove length ranging from 14 mm to 16 mm.

6. The intramedullary nail aiming arm according to claim 4, characterized in that: The first guide groove has a groove width ranging from 7 mm to 11 mm.

7. The intramedullary nail aiming arm according to claim 1, characterized in that: The first aiming body is provided with an aiming mark position and an initial mark position, and one aiming mark position corresponds to the center of one first hole position; The second aiming member is provided with a pointing mark, and the pointing mark and the center of the second hole position are located on the same horizontal line; the pointing mark is used to point to the initial mark position when the second aiming member is located at the initial position, and is also used to point to the aiming mark position when the second aiming member moves to the aiming position.

8. The intramedullary nail aiming arm according to claim 7, characterized in that: The adjusting block is provided with an adjusting mark; the first aiming body is provided with a hollow groove, and the adjusting mark is at least partially located in the hollow groove area; The adjustment marking piece is used to point to the aiming marking position or the initial marking position when the adjustment block moves.

9. The intramedullary nail aiming arm according to claim 1, characterized in that: The first aiming body is provided with a plurality of limiting grooves arranged along the height direction of the first aiming body; one of the first hole positions corresponds to one of the limiting grooves, and the area of ​​the first aiming body corresponding to the initial position of the second aiming member has the limiting groove; The second aiming member is provided with a slide groove extending along the height direction thereof; The aiming module further comprises: a locking member for locking or releasing the first aiming body and the second aiming member; The lock comprises: A movable rod, which is slidably disposed in the slide groove and is at least partially located outside the second aiming member; an unlocking groove is provided on the movable rod; An elastic member, wherein the elastic member is arranged in the slide groove, and one end of the elastic member abuts against the bottom of the movable rod; A limiting member, wherein the limiting member is arranged on the second aiming member; the limiting member is used to be embedded in any one of the limiting grooves; when the movable rod slides to the unlocking position, the limiting member is embedded in the unlocking groove, and the second aiming member is unlocked from the first aiming body; when the movable rod slides to the locking position, the limiting member is embedded in the limiting groove and is located outside the unlocking groove and abuts against the side wall of the movable rod, and the second aiming member is locked and fixed to the first aiming body.

10. The intramedullary nail aiming arm according to claim 1, characterized in that: A circular hole forms the second hole position; the second guide groove is in a horizontal "∞" shape.

11. An intramedullary nail aiming device, characterized in that: include: The intramedullary nail aiming arm according to any one of claims 1 to 10; A handle is connected to the intramedullary nail aiming arm.

12. An aiming module for an intramedullary nail aiming arm, characterized in that: The aiming module is the aiming module in the intramedullary nail aiming arm according to any one of claims 1-10.

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