An intramedullary nail sighting system and method of implanting an intramedullary nail

Abstract

The application relates to the technical field of medical devices, and discloses an intramedullary nail aiming system and an intramedullary nail implantation method, which comprise an intramedullary nail, a guide rod, an aiming frame and a guide piece, wherein the intramedullary nail is provided with three proximal holes, the axes of the three proximal holes are parallel to a Y-axis visual angle, intersect with an X-axis visual angle and a Z-axis visual angle, and the axes of two proximal holes are mirror structures in the X-axis visual angle; the other end of the intramedullary nail is a free end, and two parallel distal holes are arranged along the Y-axis; the guide rod is arranged along the X-axis and is fixed relative to the intramedullary nail; the aiming frame is slidably connected with the guide rod and can be detached, the aiming frame is provided with an aiming hole for aiming at the distal holes and is provided with two slot holes corresponding to the proximal holes; the guide piece is arranged in the two slot holes, and the structure of the guide piece is adjustable. The single aiming frame can be used for aiming at all the proximal holes and the distal holes, has the advantages of good universality and few components, and has good applicability.

Description

An intramedullary nail aiming system and an intramedullary nail implantation method Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to an intramedullary nail aiming system and an intramedullary nail implantation method. Background Technology

[0002] Intramedullary nails are orthopedic internal fixation devices primarily used for fixing fractures. During application, they are inserted into the bone and then locked in place with locking screws. However, because the fixation holes on the intramedullary nail are not visible after implantation, locking screws cannot be directly screwed into the nail. Therefore, a sight is required. The procedure involves first connecting and positioning the sight to one end of the intramedullary nail, then inserting the nail into the bone. Using C-arm fluoroscopy, the position of the sight components is adjusted so that the aiming hole aligns with the fixation hole on the intramedullary nail. Drilling and implanting the locking screw then commences, enabling rapid and precise implantation to alleviate patient pain.

[0003] An existing invention patent with authorization announcement number CN110693594B discloses an intramedullary nail aiming device, which includes a handle, a lateral support, a stop support, and at least one locking nut. The lateral support can be connected to either side of the stop support to accommodate the surgical needs of intramedullary nailing of affected limbs on different sides.

[0004] As described in the above technical solution, a lateral support is used to aim at the distal hole of the intramedullary nail. However, when fixing the proximal hole, since the proximal hole is opened at an angle, it is necessary to replace the lateral support with a different shape to meet the aiming requirements of the proximal hole. At the same time, since there are multiple proximal holes with different angles, it is difficult to meet the aiming requirements by relying solely on another lateral support. In this case, it is also necessary to install aiming auxiliary accessories on the lateral support to correspond to the proximal hole. This results in the existing aiming system having a large number of parts and limited versatility due to its fixed shape, so it is urgent to improve it. Summary of the Invention

[0005] In view of this, the present invention proposes an intramedullary nail aiming system and intramedullary nail implantation method that is suitable for aiming at proximal and distal holes, has a small number of parts, and is highly versatile, in order to solve the problem that existing aiming systems require multiple lateral supports and auxiliary accessories, resulting in a large number of parts and limited versatility.

[0006] The technical solution of this invention is implemented as follows:

[0007] On one hand, the present invention provides an intramedullary nail aiming system, comprising an intramedullary nail, a guide rod, an aiming frame, and a guide element, wherein,

[0008] The intramedullary nail is laid along the X-axis and has three proximal holes. The axes of the three proximal holes are parallel to the Y-axis and intersect the X-axis and Z-axis. The axes of two of the proximal holes are mirror images of each other in the X-axis view.

[0009] The other end of the intramedullary nail is a free end, with two parallel distal holes along the Y-axis;

[0010] The guide rod is laid along the X-axis and fixed relative to the intramedullary nail, and the guide rod overlaps with the intramedullary nail from the Z-axis perspective;

[0011] The aiming frame is slidably connected to the guide rod and is detachable. The aiming frame has an aiming hole for aiming at the far end hole and two slots corresponding to the near end hole.

[0012] Guides are provided in both slots, and the guide structure is adjustable so that one guide is aimed at both proximal holes and the other guide is aimed at one proximal hole.

[0013] Based on the above technical solutions, preferably, the guide component includes a positioning cylinder, a slider, an adjusting screw, and a push plate, wherein,

[0014] The positioning cylinder is set inside the slot;

[0015] Two sliders are arranged opposite each other on the circumferential surface of the positioning cylinder and slide in cooperation with the aiming frame;

[0016] The adjusting screw engages with the aiming mount via a thread and extends into the slot;

[0017] The push plate is rotatably connected to one end of the adjusting screw located in the slot, and abuts against the positioning cylinder;

[0018] The aiming frame has a clearance slot that communicates with the slot hole.

[0019] Based on the above technical solutions, preferably, it also includes a sliding frame. The aiming frame includes a first end plate, a first connecting part, a second connecting part, a third connecting part, a fourth connecting part, and a second end plate connected in sequence.

[0020] The sliding frame slides with the guide rod and is connected to the first end plate;

[0021] The second connecting part and the third connecting part each have a slot, and the axis of one of the proximal holes is perpendicular to the second connecting part;

[0022] In the two proximal holes whose axes are mirrored in the X-axis view, the axis of one of the proximal holes is perpendicular to the third connecting part;

[0023] The second end plate has an aiming hole.

[0024] Based on the above technical solutions, preferably, it also includes a handle, which comprises a rod and a handle, wherein...

[0025] One end of the rod is connected to the intramedullary nail;

[0026] One end of the handle is connected to the other end of the rod, and the other end of the handle is connected to the guide rod;

[0027] The guide rod has multiple positioning holes and is connected to the handle by a pin. The side of the guide rod has a sliding groove, and the sliding bracket slides in conjunction with the sliding groove.

[0028] Based on the above technical solutions, preferably, a connector is also included, which comprises a rod, a first spring, and a circumferential limiting member, wherein...

[0029] The insertion rod passes through the aiming frame and the sliding frame, and is inserted into the guide rod;

[0030] The first spring is sleeved on the insertion rod, with one end of the first spring abutting against the aiming frame and the other end abutting against the sliding frame;

[0031] The circumferential limiting component is used to position the aiming frame circumferentially relative to the insertion rod.

[0032] Based on the above technical solutions, preferably, when the aiming frame aims at the far-end hole, the circumferential limiting component includes a plug, a connecting rod, and a U-rod, wherein,

[0033] There are two plugs; one plug is partially inserted into the guide rod, and the other plug is partially inserted into the first end plate of the aiming frame.

[0034] There are two connecting rods, each connected to a plug. The connecting rods pass through the first end plate, and the diameter of the connecting rods is smaller than the diameter of the plugs.

[0035] Each end of the U-rod is connected to a connecting rod, and the U-rod is located between the first end plate and the sliding frame;

[0036] The first end plate has guide grooves corresponding to the connecting rod and plug.

[0037] Based on the above technical solutions, preferably, when the aiming frame aims at the near end hole, the circumferential limiting component is a locking bolt;

[0038] There are two locking bolts. The locking bolts are rotatably connected to the sliding frame and are axially positioned. The locking bolts are also threadedly connected to the first end plate of the aiming frame.

[0039] Based on the above technical solutions, preferably, the system also includes a positioning component, and the connecting component further includes a limiting cylinder and a second spring.

[0040] The limiting sleeve is installed on the insertion rod, and the end of the limiting sleeve near the guide rod is closed;

[0041] The second spring is sleeved on the insert rod. One end of the second spring abuts against the sliding frame, and the other end is located inside the limiting cylinder and abuts against the closed end of the limiting cylinder.

[0042] The positioning element is inserted into the guide rod, and the positioning element is arranged along the Z-axis and abuts against the end of the intramedullary nail where the distal hole is opened;

[0043] The end of the insertion rod abuts against the positioning component.

[0044] Based on the above technical solutions, preferably, the positioning component includes a positioning sleeve, a positioning rod, a positioning frame, and a locking pin, wherein...

[0045] The positioning sleeve is inserted into the guide rod. The positioning sleeve has two opposite waist grooves, and the positioning sleeve has a through hole corresponding to the insertion rod.

[0046] The positioning rod is inserted into the positioning sleeve, and the positioning rod has a reduced diameter section corresponding to the waist groove;

[0047] The positioning bracket is snapped onto the guide rod;

[0048] The locking pin is inserted into the positioning bracket and corresponds to the reduced diameter section.

[0049] On the other hand, the present invention provides an intramedullary nail implantation method, which applies the above-mentioned intramedullary nail aiming system and includes the following steps:

[0050] S1. Determine and make the surgical incision on the patient's limb;

[0051] S2. Determine the entry point and drill a hole at the end of the limb bone, then insert a spiral guide pin, and then place a hollow mouth opener on the guide pin. Screw the hollow mouth opener into the bone. The depth of the guide pin insertion and the depth of the hollow mouth opener insertion are determined according to the bone location. After opening, remove the spiral guide pin and the hollow mouth opener.

[0052] S3. Insert a ball-headed guide pin into the bone, pass through the fracture line, and place a soft drill on the ball-headed guide pin to perform medullary reaming. Then remove the ball-headed guide pin and the soft drill.

[0053] S4. Connect the pole to the handle, and then connect the intramedullary nail to the pole;

[0054] S5. Screw the intramedullary nail into the medullary cavity until the intramedullary nail crosses the fracture line and the end of the intramedullary nail is flush with or lower than the end of the bone.

[0055] S6. Connect the aiming frame and the guide rod through the sliding frame. At the same time, connect and position the aiming frame to the guide rod through the connector. Then connect the guide rod to the handle.

[0056] S7. Place a positioning sleeve on the guide rod, corresponding to one of the distal holes, and then use a bone drill to drill holes in the bone through the positioning sleeve.

[0057] S8. Remove the bone drill and use a flat-head drill to remove bone fragments from the bone hole until the tip of the flat-head drill touches the intramedullary nail, then remove the flat-head drill.

[0058] S9. Insert the positioning rod into the positioning sleeve until the positioning rod abuts against the intramedullary nail, and then use the positioning frame and locking pin to lock the positioning rod.

[0059] S10. For one of the distal holes, insert a sleeve into one of the aiming holes and push the sleeve to the bone surface, then remove the separated soft tissue.

[0060] S11. Insert the bone drill into the tube sleeve, drill through the bone cortex with the drill bit, and then remove the bone drill and tube sleeve.

[0061] S12 installs a depth measuring rod into the aiming hole and inserts a right-angle positioning rod into the depth measuring rod for positioning;

[0062] S13. For the other distal hole, repeat steps S10~S11 to complete the hole opening. Then install the protective sleeve and use a wrench to screw the locking pin into the distal hole through the protective sleeve. Then remove the previously installed depth gauge and right-angle positioning rod, and repeat the installation of the protective sleeve and screwing in the locking pin. After that, remove the protective sleeve.

[0063] S14. Remove the positioning rod, positioning bracket and locking pin mentioned in step S9, replace the protective sleeve with a positioning sleeve, and install the locking pin by the method mentioned in step S13.

[0064] S15. Separate the connector from the guide rod, and move the aiming frame by the sliding bracket to approach the proximal hole and achieve positioning;

[0065] S16. Adjust the position of the aiming frame with the connector, and then adjust the attitude of the two guides so that the positioning cylinder is aligned with the proximal hole. Then repeat the locking pin installation steps mentioned in steps S10 to S13 and insert the locking pins into two of the proximal holes.

[0066] S17. Remove the aiming frame, guide, sliding frame and connector together and install them on the other side of the guide rod;

[0067] S18. Repeat step S16 to insert the locking pin into the last proximal hole.

[0068] S19. Separate the intramedullary nail from the rod;

[0069] S20. Use the tail cap holder to screw the tail cap in, so that the tail cap is connected to and locked to the end of the intramedullary nail, thus completing the assembly of the intramedullary nail.

[0070] The intramedullary nail aiming system and intramedullary nail implantation method of the present invention have the following advantages over the prior art:

[0071] (1) By setting aiming holes on the aiming frame, it can aim at the distal hole of the intramedullary nail. The aiming frame is also provided with slots for installing guides. Thus, the proximal hole of the intramedullary nail can be aimed at through the guides. Since the aiming frame and the guide rod are detachably connected and the structure of the guides is adjustable, it can aim at three proximal holes, which facilitates the subsequent assembly of locking nails. It has the advantages of using a single aiming frame to aim at all proximal and distal holes, good versatility and few parts, and good applicability.

[0072] (2) The guide consists of a positioning cylinder, a slider, an adjusting screw, and a push plate. The positioning cylinder can be adjusted by sliding the adjusting screw, so that it can better aim at the near end hole, which improves the convenience of application and has good versatility. At the same time, there are two sliders on the positioning cylinder, so the positioning cylinder can be taken out from the slot, flipped and put back. Since the axes of the two near end holes are mirrored in the X-axis view, when the positioning cylinder is flipped and the aiming frame is moved to the other side of the guide rod, the flipped positioning cylinder can aim at the near end hole. In this way, the guide can aim at one near end hole on each side of the guide rod by relying on the flip adjustment structure, which improves the convenience of application. Moreover, the integrated structure of the guide and the aiming frame reduces the number of external large aiming accessories, making the structure lighter and easier to use.

[0073] (3) The aiming frame and the guide rod are slidably engaged by the sliding frame, and a connecting piece is provided to realize the relative positioning of the aiming frame and the guide rod to ensure the stability of the position during guidance; wherein, when aiming at the far end hole, the first spring can push the aiming frame to move to the guide rod by relying on the guide of the insertion rod, so that the circumferential limiting piece composed of the plug, connecting rod and U rod can be inserted into the guide rod, thereby realizing the positioning of the sliding frame and the aiming frame, thus ensuring the stability of the position;

[0074] (4) When aiming at the proximal hole, the circumferential limiting component is replaced by two locking bolts. In this way, the aiming frame and the sliding frame are limited and connected by inserting the guide rod and locking bolts, which can also realize the positioning of the aiming frame. This structural design adapts to the shape of the guide rod and further improves the convenience of application. At the same time, this structure can adjust the relative position of the aiming frame and the guide rod. When the aiming frame is switched on both sides of the guide rod, the position of the guide component can be adjusted to facilitate aiming and improve the convenience of application.

[0075] (5) A limiting cylinder is provided on the insertion rod of the connector, and a second spring is provided inside the limiting cylinder. In this way, when positioning the fixing hole on the intramedullary nail, the second spring can push the insertion rod to insert into the guide rod and provide a holding force, thereby ensuring stable positioning. At the same time, this also allows the insertion rod to hold the positioning component, which improves the force feedback during the assembly and adjustment of the positioning component and helps to improve the operation accuracy.

[0076] (6) In this intramedullary nail implantation method, firstly, the distal hole is locked and nailed through the aiming hole of the aiming frame, then the two proximal holes are locked and nailed through the positioning cylinders of the two guides, and finally the aiming frame is moved to the other side of the guide rod, and the last proximal hole is locked and nailed through a positioning cylinder. In this way, no additional aiming accessories are needed. Only the aiming frame needs to be switched and the positioning cylinder needs to be flipped to adjust its axis orientation, which effectively improves the convenience of the operation. Attached Figure Description

[0077] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0078] Figure 1 is a perspective view of the intramedullary nail aiming system of the present invention aiming at the distal hole;

[0079] Figure 2 is a perspective view of the intramedullary nail aiming system of the present invention aiming at the proximal hole;

[0080] Figure 3 is an enlarged view of the structure at point A in Figure 2 of the present invention;

[0081] Figure 4 is a perspective view of the disassembly of the aiming frame of the intramedullary nail aiming system of the present invention;

[0082] Figure 5 is a perspective view of the sliding frame and aiming frame of the intramedullary nail aiming system of the present invention;

[0083] Figure 6 is an enlarged view of the structure at point B in Figure 5 of the present invention;

[0084] Figure 7 is an enlarged view of the structure at point C in Figure 5 of the present invention;

[0085] Figure 8 is a perspective view of the aiming frame of the intramedullary nail aiming system of the present invention from a different side.

[0086] Figure 9 is a schematic diagram of the reversing structure of the positioning cylinder of the intramedullary nail aiming system of the present invention;

[0087] Figure 10 is a perspective view of the guide and connector of the intramedullary nail aiming system of the present invention disassembled;

[0088] Figure 11 is a perspective view of the positioning components of the intramedullary nail aiming system of the present invention disassembled;

[0089] Figure 12 is an enlarged view of the structure at point D in Figure 11 of the present invention;

[0090] Figure 13 is a front view of the intramedullary nail aiming system of the present invention;

[0091] Figure 14 is a cross-sectional view along direction AA in Figure 13 of the present invention;

[0092] Figure 15 is an enlarged view of the structure at point E in Figure 14 of the present invention;

[0093] Figure 16 is a side view of the intramedullary nail aiming system of the present invention;

[0094] Figure 17 is a cross-sectional view along line BB in Figure 16 of the present invention;

[0095] Figure 18 is a perspective view showing all aiming postures of the intramedullary nail aiming system of the present invention;

[0096] Figure 19 is a bottom-view perspective view illustrating all aiming postures of the intramedullary nail aiming system of the present invention;

[0097] Figure 20 is a Y-axis view of all aiming postures of the intramedullary nail aiming system of the present invention;

[0098] Figure 21 is an X-axis view of all aiming postures of the intramedullary nail aiming system of the present invention;

[0099] Figure 22 is a Z-axis view of all aiming postures of the intramedullary nail aiming system of the present invention;

[0100] Figure 23 is a perspective view of the intramedullary nail aiming system of the present invention with X-axis and Y-axis adjustment components;

[0101] In the diagram: 1. Intramedullary nail; 101. Proximal hole; 102. Distal hole; 2. Guide rod; 201. Positioning hole; 202. Slide groove; 3. Aiming frame; 31. First end plate; 32. First connecting part; 33. Second connecting part; 34. Third connecting part; 35. Fourth connecting part; 36. Second end plate; 301. Aiming hole; 302. Slot hole; 303. Clearance groove; 304. Guide groove; 4. Guide component; 41. Positioning cylinder; 42. Slider; 43. Adjusting screw; 44. Push plate; 5. Sliding frame; 6. Handle; 61. Rod; 62. Handle; 7. Connector; 71. Insert rod; 72. First spring; 73. Circumferential limiting component; 731. Plug; 732. Connecting rod; 733. U-rod; 74. Limiting sleeve; 75. Second spring; 8. Positioning component; 81. Positioning sleeve; 82. Positioning rod; 821. Reduced diameter section; 83. Positioning frame; 84. Locking pin; 801. Waist groove; 802. Through hole; 9. X-axis adjusting component; 91. Connecting plate; 92. Screw; 10. Y-axis adjusting component; 1001. Guide frame; 1002. Locking bolt; 100. Axis. Detailed Implementation

[0102] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0103] As shown in Figures 1 to 23, the intramedullary nail aiming system of the present invention includes an intramedullary nail 1, a guide rod 2, an aiming frame 3, a guide member 4, a sliding frame 5, a handle 6, a connector 7, and a positioning member 8;

[0104] The intramedullary nail aiming system of the present invention is intended for implanting an intramedullary nail 1 into a patient's bone, and for fixing the intramedullary nail 1 by locking the locking screw to the proximal hole 101 and the distal hole 102 of the intramedullary nail 1 when the intramedullary nail 1 is located in the patient's bone and the proximal hole 101 and the distal hole 102 are not visible.

[0105] When using this intramedullary nail aiming system, C-arm fluoroscopy assistance is required. Specifically, the C-arm uses X-ray fluoroscopy imaging. This fluoroscopy assistance is a conventional technique, so the relevant fluoroscopy methods will not be described in detail.

[0106] It should be noted that, in order to meet the needs of fluoroscopic aiming, each component of this intramedullary nail aiming system is configured as either fluoroscopic or non-fluoroscopic structures according to assembly requirements. There is no limitation on this, but it depends on the specific circumstances.

[0107] In a common scenario, the intramedullary nail 1 is not transparent to facilitate observation of its position within the bone, the guide rod 2 is transparent to facilitate the insertion and positioning of the intramedullary nail 1 into the positioning component 8, and the aiming frame 3 and its mounted components are transparent to facilitate the installation of the locking nail by aligning it with the fixation holes of the proximal hole 101 and the distal hole 102 of the intramedullary nail 1.

[0108] Furthermore, the handle 6 can also be configured as a fluoroscopic structure to avoid interfering with proximal imaging of the intramedullary nail 1.

[0109] As shown in Figure 1, the intramedullary nail 1 is arranged along the X-axis and has three proximal holes 101. The axes of the three proximal holes 101 are parallel to the Y-axis and intersect the X-axis and Z-axis. The axes of two of the proximal holes 101 are mirror images of each other in the X-axis view. The other end of the intramedullary nail 1 is a free end and has two parallel distal holes 102 along the Y-axis. The guide rod 2 is arranged along the X-axis and is fixed relative to the intramedullary nail 1. The guide rod 2 overlaps with the intramedullary nail 1 in the Z-axis view. The aiming frame 3 is slidably connected to the guide rod 2 and is detachable. The aiming frame 3 has aiming holes 301 for aiming at the distal holes 102 and two slots 302 corresponding to the proximal holes 101. The guide member 4 is provided in both slots 302. The structure of the guide member 4 is adjustable so that one guide member 4 aims at two proximal holes 101 and the other guide member 4 aims at one proximal hole 101.

[0110] As described above, the proximal hole 101 is located near the end of the patient's bone, i.e., at one end for implantation of the intramedullary nail 1; the distal hole 102 is located at the other end of the intramedullary nail 1.

[0111] When aiming, the intramedullary nail 1 is located inside the bone, and the guide rod 2 is exposed and fixed relative to the intramedullary nail 1. At this time, C-arm fluoroscopy is required for auxiliary aiming so that the relative position of the aiming hole 301 of the aiming frame 3 and the distal hole 102 can be observed.

[0112] During operation, first install the aiming frame 3 at the far end of the guide rod 2. When the aiming hole 301 is aligned with the far end hole 102, the protective sleeve can be installed into the aiming hole 301. Then, the locking nail is implanted so that the locking nail is locked with the far end hole 102 of the intramedullary nail 1.

[0113] Among them, at least two distal holes 102 are provided and their axes are parallel, and two aiming holes 301 are also provided and their axes are parallel, so as to ensure the convenience of locking operation and the stability of locking.

[0114] As shown in Figures 18-22, to ensure the stability of the locking, three proximal holes 101 are provided. As shown in Figure 20, the axes 100 of the three proximal holes 101 are parallel on the Y-axis, that is, the inclination is the same. As shown in Figure 21, the axes 100 of the three proximal holes 101 intersect on the X-axis, and the axes of two of the proximal holes 101 are mirror images. As shown in Figure 22, the axes 100 of the three proximal holes 101 intersect on the Z-axis.

[0115] Thus, when inserting the locking pin into the proximal hole 101, the aiming frame 3 is installed at the proximal end of the guide rod 2. The aiming frame 3 has two slots 302 for installing the guide 4, so that the locking pin can be aimed and inserted into the two proximal holes 101 at the same time.

[0116] Meanwhile, since the aiming frame 3 and the guide rod 2 are detachable, and the axes of the two proximal holes 101 are mirror images, after the aiming frame 3 is disassembled and installed on the other end of the guide rod 2, the orientation of the guide 4 can be adjusted to aim at the last proximal hole 101, thus locking all the proximal holes. It has the advantages of using a single aiming frame to aim at all proximal and distal holes, good versatility and few parts, and has good applicability.

[0117] As shown in Figures 4 to 7, the guide component 4 includes a positioning cylinder 41, a slider 42, an adjusting screw 43, and a push plate 44. The positioning cylinder 41 is disposed in the slot 302. Two sliders 42 are disposed opposite each other on the circumferential surface of the positioning cylinder 41 and slide in cooperation with the aiming frame 3. The adjusting screw 43 is screwed into the aiming frame 3 by threads and extends into the slot 302. The push plate 44 is rotatably connected to one end of the adjusting screw 43 located in the slot 302 and abuts against the positioning cylinder 41. The aiming frame 3 has a clearance groove 303 that communicates with the slot 302.

[0118] As described above, the positioning cylinder 41 is used to aim at the proximal hole 101 of the intramedullary nail 1. The positioning cylinder 41 is installed in the slot 302 by two sliders 42 to achieve sliding fit.

[0119] The aiming frame 3 is provided with a clearance groove 303 that connects to the slot 302, so that the slider 42 can be installed into the groove in the slot 302 and can be easily removed for adjustment;

[0120] In application, when the aiming frame 3 is installed at the near end of the guide rod 2, the positioning cylinders 41 of the two guides 4 can each aim at a near end hole 101. If they cannot be aligned, the adjusting screw 43 is turned, and the positioning cylinder 41 is moved by the push plate 44 to align with the near end hole 101.

[0121] In the initial state, as shown in Figure 2, the aiming frame 3 aims at the two proximal holes 101 from one side; as shown in Figure 8, the other proximal hole 101 needs to be aimed at by moving the aiming frame 3 to the other side of the guide rod 2.

[0122] As shown in Figure 9(a), the axis of the last proximal hole 101 is a mirror image of the axis of the previous proximal hole 101 on the X-axis, but parallel on the Y-axis. Therefore, if the aiming frame 3 is simply reversed, the axis of the last proximal hole 101 will interfere with the axis of the positioning cylinder 41. At this time, the positioning cylinder 41 needs to be taken out from the slot 302, flipped, and put back to complete the attitude adjustment of the positioning cylinder 41. The structure at this time is shown in Figure 9(b), which can adapt to the positioning of the last proximal hole 101.

[0123] Specifically, since the two proximal holes 101 that are mirror images of each other on the axis have a certain gap on the X-axis, it is necessary to rotate the adjusting screw 43 to drive the positioning cylinder 41 to move through the push plate 44, thereby aligning it with the proximal hole 101.

[0124] As shown in Figure 5, the aiming frame 3 includes a first end plate 31, a first connecting part 32, a second connecting part 33, a third connecting part 34, a fourth connecting part 35, and a second end plate 36 connected in sequence. The sliding frame 5 is slidably engaged with the guide rod 2 and connected to the first end plate 31. The second connecting part 33 and the third connecting part 34 each have a slot 302, and the axis of one of the proximal holes 101 is perpendicular to the second connecting part 33. Among the two proximal holes 101 whose axes are mirrored in the X-axis view, the axis of one of the proximal holes 101 is perpendicular to the third connecting part 34. The second end plate 36 has an aiming hole 301.

[0125] As described above, the aiming frame 3 is composed of multiple parts, wherein the first end plate 31 is used to connect the sliding frame 5, and then the sliding frame 5 and the guide rod 2 are slidably engaged to achieve position adjustment so that the aiming frame 3 can correspond to the near end hole 101 or the far end hole 102.

[0126] The second connecting part 33 and the third connecting part 34 are used to open the slot 302 to install the guide 4. The axes 100 of the two proximal holes 101 are perpendicular to the second connecting part 33 and the third connecting part 34 respectively, so as to facilitate the alignment operation of the guide 4.

[0127] The second end plate 36 is used to open the aiming hole 301, which is used to align with the distal hole 102 for the installation of the locking pin.

[0128] The first connecting part 32 and the fourth connecting part 35 are used for connection to form a complete aiming frame 3.

[0129] In some embodiments, the first connecting part 32 and the fourth connecting part 35 are configured as telescopic structures, such as telescopic sleeves, so that the positions of the second connecting part 33, the third connecting part 34, the second end plate 36 and the guide 4 can be adjusted adaptively to improve the versatility of this intramedullary nail aiming system.

[0130] As shown in Figure 2, the handle 6 includes a rod 61 and a handle 62. One end of the rod 61 is connected to the intramedullary nail 1; one end of the handle 62 is connected to the other end of the rod 61, and the other end of the handle 62 is connected to the guide rod 2. The guide rod 2 has multiple positioning holes 201 and is connected to the handle 62 through pins. The side of the guide rod 2 has a sliding groove 202, and the sliding frame 5 slides in cooperation with the sliding groove 202.

[0131] As described above, the handle 6 is divided into two parts: a rod 61 and a handle 62. During assembly, one end of the rod 61 is inserted into the handle 62 and fixed by a locking pin, while the other end is inserted into the end of the intramedullary nail 1. The rod 61 is a hollow structure. At this time, a long screw is inserted into the rod 61, and then the long screw is screwed into the intramedullary nail 1 to achieve relative fixation of the intramedullary nail 1, the rod 61, and the handle 62.

[0132] The other end of the handle 62 is used to connect the guide rod 2, thereby enabling the relative positioning of the sliding frame 5 and the aiming frame 3 with the intramedullary nail 1;

[0133] The guide rod 2 has multiple positioning holes 201 to facilitate connection and fixation with the handle 62 and to achieve position adjustment; at the same time, the guide rod 2 has a sliding groove 202 on its side to allow the sliding frame 5 to slide, thereby adjusting the position of the aiming frame 3.

[0134] As shown in Figures 3, 7, and 13-15, the connector 7 includes a rod 71, a first spring 72, and a circumferential limiting member 73. The rod 71 passes through the aiming frame 3 and the sliding frame 5 and is inserted into the guide rod 2. The first spring 72 is sleeved on the rod 71, with one end of the first spring 72 abutting against the aiming frame 3 and the other end abutting against the sliding frame 5. The circumferential limiting member 73 is used to position the aiming frame 3 circumferentially relative to the rod 71.

[0135] As described above, the connector 7 is used to position the sliding frame 5 and the aiming frame 3 relative to the guide rod 2;

[0136] The first spring 72 pushes the aiming frame 3 to hold the guide rod 2, thereby achieving positioning. The insertion rod 71 also plays a positioning role to prevent the sliding frame 5 from sliding, thus ensuring the stability of the overall structure. At the same time, the insertion rod 71 plays a guiding role so that the aiming frame 3 can stably approach or move away from the guide rod 2.

[0137] Furthermore, to ensure structural stability, a circumferential limiting component 73 is provided to prevent the aiming frame 3 from rotating relative to the insertion rod 71.

[0138] For the circumferential limiting member 73, the present invention provides two structures, which are respectively applicable to the positioning of the aiming frame 3 when aiming at the proximal hole 101 and the distal hole 102.

[0139] As shown in Figures 7 and 10, when the aiming frame 3 aims at the far end hole 102, the circumferential limiting component 73 includes a plug 731, a connecting rod 732, and a U-rod 733. Two plugs 731 are provided, one partially inserted into the guide rod 2 and the other partially inserted into the first end plate 31 of the aiming frame 3. Two connecting rods 732 are provided, each connected to one plug 731. The connecting rods 732 pass through the first end plate 31, and their diameter is smaller than that of the plugs 731. The two ends of the U-rod 733 are each connected to one connecting rod 732, and the U-rod 733 is located between the first end plate 31 and the sliding frame 5. The first end plate 31 has guide grooves 304 corresponding to the connecting rods 732 and the plugs 731.

[0140] As described above, when the aiming frame 3 aims at the distal hole 102, the circumferential limiting member 73 is composed of a plug 731, a connecting rod 732 and a U-rod 733.

[0141] In application, under the push of the first spring 72, the aiming frame 3 will move to the guide rod 2. Since the circumferential limiting member 73 is installed on the aiming frame 3, it will move synchronously so that the two plugs 731 can be inserted into the guide rod 2, thereby ensuring that the aiming frame 3 is circumferentially limited relative to the plug rod 71.

[0142] The plug 731 is connected to the connecting rod 732 and the U-rod 733. Since the diameter of the connecting rod 732 is small, the plug 731 can be inserted into the first end plate 31 of the aiming frame 3 to achieve pre-positioning, and the aiming frame 3 can push the circumferential limiting member 73 to move.

[0143] Meanwhile, a guide groove 304 is provided on the first end plate 31, so that the circumferential limiting member 73 can be pushed by the U rod 733 to make the plug 731 disengage from the first end plate 31 and then it can be removed.

[0144] Then, the aiming frame 3 is slid to the position of the corresponding proximal hole 101 by the sliding frame 5, and then the circumferential limiting component 73 can be replaced.

[0145] As shown in Figure 3, when the aiming frame 3 aims at the near end hole 101, the circumferential limiting member 73 is a locking bolt; there are two locking bolts, which are rotatably connected to the sliding frame 5 and axially positioned, and the locking bolts are threadedly connected to the first end plate 31 of the aiming frame 3.

[0146] As described above, when aiming at the proximal hole 101, the circumferential limiting member 73 used for positioning the aiming frame 3 is replaced with a locking bolt.

[0147] Thus, by rotating and circumferentially positioning the two locking bolts to the sliding frame 5, the relative circumferential positioning of the aiming frame 3 and the insertion rod 71 is achieved after the locking bolts are connected to the first end plate 31 of the aiming frame 3.

[0148] That is, when aiming at the distal hole 102, the circumferential limiting member 73 is connected to the guide rod 2 for limiting; while when aiming at the proximal hole 101, the circumferential limiting member 73 is connected to the sliding frame 5 for limiting; both can achieve circumferential limiting of the aiming frame 3 relative to the insertion rod 71 to prevent the aiming frame 3 from rotating.

[0149] The above two types of circumferential limiting components 73 are designed to accommodate the structural differences between the near and far ends of the guide rod 2, and are also adjustments made according to aiming requirements;

[0150] Specifically, when aiming at the proximal hole 101, the relative distance between the aiming frame 3 and the guide rod 2 can be adjusted by rotating the locking bolt, thereby adjusting the position of the guide 4 for better aiming, which also improves the versatility of this intramedullary nail aiming system.

[0151] As shown in Figures 10 and 15, the connector 7 also includes a limiting cylinder 74 and a second spring 75. The limiting cylinder 74 is sleeved on the insertion rod 71, and the end of the limiting cylinder 74 near the guide rod 2 is closed. The second spring 75 is sleeved on the insertion rod 71, with one end of the second spring 75 abutting against the sliding frame 5 and the other end located inside the limiting cylinder 74, abutting against the closed end of the limiting cylinder 74. The positioning member 8 is inserted into the guide rod 2, and the positioning member 8 is arranged along the Z-axis, abutting against the end of the intramedullary nail 1 with the distal hole 102. The end of the insertion rod 71 abuts against the positioning member 8.

[0152] As described above, in order to ensure the stability of the insertion of the insertion rod 71 and the guide rod 2, a limit sleeve 74 and a second spring 75 are provided;

[0153] One end of the limiting cylinder 74 is connected to the insertion rod 71 and is set as a closed structure, which facilitates the installation of the second spring 75. Relying on the elasticity of the second spring 75, the insertion rod 71 can be pushed by the limiting cylinder 74 to be stably inserted into the guide rod 2.

[0154] Meanwhile, due to the setting of the limiting cylinder 74, it plays a protective role for the second spring 75, which can avoid the problem of interference caused by cross rotation with the first spring 72;

[0155] Specifically, the distal end of the guide rod 2 has an opening for the insertion of the plug 731 and the insertion rod 71, and the proximal end of the guide rod 2 has an opening for the insertion of the insertion rod 71, so as to limit the sliding frame 5 and ensure the stability of the aiming frame 3.

[0156] In some embodiments, a locking bolt is provided on the sliding frame 5 to fix and limit the sliding frame 5 and the guide rod 2.

[0157] Among them, positioning component 8 is used for pre-positioning, and the pre-positioning operation is performed before the locking pin assembly;

[0158] Specifically, the distal end of the guide rod 2 has an insertion hole for inserting the positioning member 8 until the positioning member 8 abuts against the distal end of the intramedullary nail 1 to achieve the positioning function;

[0159] During operation, the insertion rod 71 relies on the elastic force of the second spring 75 to hold the positioning member 8 at its end. This provides a certain resistance when inserting into the positioning member 8, thus providing good force feedback. This helps to improve the accuracy of the surgical operation and ensures the normal assembly of components and the operation.

[0160] As shown in Figures 11-17, the positioning component 8 includes a positioning sleeve 81, a positioning rod 82, a positioning frame 83, and a locking pin 84. The positioning sleeve 81 is inserted into the guide rod 2 and has two opposing grooves 801. The positioning sleeve 81 also has a through hole 802 corresponding to the insertion rod 71. The positioning rod 82 is inserted into the positioning sleeve 81 and has a reduced diameter section 821 corresponding to the groove 801. The positioning frame 83 is snapped onto the guide rod 2. The locking pin 84 is inserted into the positioning frame 83 and corresponds to the reduced diameter section 821.

[0161] As described above, the positioning component 8 consists of a positioning sleeve 81, a positioning rod 82, a positioning frame 83, and a locking pin 84.

[0162] The positioning sleeve 81 is inserted into the guide rod 2 and is used for guiding the positioning rod 82, the drill bit, and the installation of the locking pin.

[0163] Specifically, after the hole is drilled, the positioning rod 82 is inserted into the positioning sleeve 81 until the positioning rod 82 abuts the distal end of the intramedullary nail 1 to achieve the positioning function;

[0164] The positioning sleeve 81 has a through hole 802 corresponding to the insertion rod 71, so that the end of the insertion rod 71 can abut against the knife positioning rod 82, so that the positioning rod 82 can obtain force feedback when it is inserted or removed.

[0165] The positioning rod 82 has a reduced diameter section 821, and the positioning sleeve 81 has a groove 801 corresponding to the reduced diameter section 821. After the positioning rod 82 is inserted into place, the positioning frame 83 is installed on the guide rod 2. The positioning frame 83 can be used to lock the reduced diameter section 821 to achieve the positioning of the positioning rod 82. The locking pin 84 locks simultaneously and abuts against the positioning rod 82 to compensate for the assembly gap, thereby ensuring stable positioning.

[0166] Furthermore, the intramedullary nail 1 also has a distal hole 102 corresponding to the positioning rod 82. After the locking screws of the distal hole 102 and proximal hole 101 are installed, the locking screws of the distal hole 102 at this location can be installed.

[0167] As shown in Figure 23, in some embodiments, the intramedullary nail aiming system of the present invention is further provided with an X-axis adjustment member 9 and a Y-axis adjustment member 10;

[0168] The X-axis adjusting component 9 is provided with two connecting plates 91 and a screw 92; correspondingly, there are two positioning components 8. At this time, the slot on the guide rod 2 for assembling the positioning component 8 is opened as an elongated hole so that the positioning sleeve 81 and the positioning rod 82 have a certain sliding space on the X-axis after passing through the slot.

[0169] Each of the two connecting plates 91 is connected to the positioning frame 83 of a positioning element 8. The screw 92 is threadedly connected to one of the connecting plates 91 and rotatably connected to the other connecting plate 91, and is axially positioned. Thus, when adjusting, the distance between the two positioning elements 8 can be adjusted relative to each other by rotating the screw 92, thereby adjusting the distance between the positioning elements 8 on the X-axis, which can better align the intramedullary nail 1.

[0170] To achieve relative fixation between the positioning component 8 and the guide rod 2, a threaded hole is made on the positioning frame 83, and a bolt is installed so that the bolt passes through the positioning frame 83 and holds the guide rod 2 for locking and fixing.

[0171] Among them, the Y-axis adjusting component 10 is used to enable the guide rod 2 and the positioning component 8 to swing and adjust on the Y-axis, with the Z-axis as the axis.

[0172] Specifically, the Y-axis adjusting component 10 is provided with a guide frame 1001 connected to the handle 6, and an arc-shaped groove is formed on the guide frame 1001; the guide rod 2 is locked to the handle 6 by a locking bolt 1002, which passes through the guide rod 2 and is threadedly connected to the handle 6; the guide rod 2 is also locked to the guide frame 1001 by a locking bolt 1002. In specific cooperation, a slider is provided on the side of the guide frame 1001 away from the guide rod 2, and the locking bolt 1002 passes through the guide frame 1001 and is threadedly connected to the slider.

[0173] When making adjustments, loosen the two locking bolts 1002, and the guide rod 2 can rotate around the locking bolts 1002 connected to the handle 6 as the pivot, thereby making minor adjustments. After the adjustment is in place, lock the two locking bolts 1002 back in place.

[0174] The intramedullary nail implantation method of the present invention, using the above-described intramedullary nail aiming system, includes the following steps:

[0175] S1. Determine and make the surgical incision on the patient's limb;

[0176] S2. Determine the entry point and drill a hole at the end of the limb bone, then insert a spiral guide pin, and then place a hollow mouth opener on the guide pin. Screw the hollow mouth opener into the bone. The depth of the guide pin insertion and the depth of the hollow mouth opener insertion are determined according to the bone location. After opening, remove the spiral guide pin and the hollow mouth opener.

[0177] S3. Insert a ball-headed guide pin into the bone, pass through the fracture line, and place a soft drill on the ball-headed guide pin to perform medullary reaming. Then remove the ball-headed guide pin and the soft drill.

[0178] S4. Connect the rod 61 to the handle 62, and then connect the intramedullary nail 1 to the rod 61;

[0179] S5. Screw the intramedullary nail 1 into the medullary cavity until the intramedullary nail 1 crosses the fracture line and the end of the intramedullary nail 1 is flush with or lower than the end of the bone.

[0180] S6. Connect the aiming frame 3 and the guide rod 2 through the sliding frame 5. At the same time, connect and position the aiming frame 3 to the guide rod 2 through the connector 7. Then connect the guide rod 2 to the handle 62.

[0181] S7. Place a positioning sleeve 81 on the guide rod 2, corresponding to one of the distal holes 102, and then use a bone drill to drill holes in the bone through the positioning sleeve 81.

[0182] S8. Remove the bone drill and use a flat-head drill to remove bone fragments from the bone hole until the tip of the flat-head drill touches the intramedullary nail 1, then remove the flat-head drill.

[0183] S9. Insert the positioning rod 82 into the positioning sleeve 81 until the positioning rod 82 abuts against the intramedullary nail 1, and then use the positioning frame 83 in conjunction with the locking pin 84 to lock the positioning rod 82.

[0184] S10. For one of the distal holes 102, insert a sleeve into one of the aiming holes 301, push the sleeve to the bone surface, and then remove the separated soft tissue.

[0185] S11. Insert the bone drill into the tube sleeve, drill through the bone cortex with the drill bit, and then remove the bone drill and tube sleeve.

[0186] S12 installs a depth measuring rod into the aiming hole 301 and inserts a right-angle positioning rod into the depth measuring rod for positioning;

[0187] S13. For the other distal hole 102, repeat steps S10~S11 to complete the opening, then install the protective sleeve, and use a wrench to screw the locking pin into the distal hole 102 through the protective sleeve. Then remove the previously installed depth gauge and right angle positioning rod, and repeat the installation of the protective sleeve and screwing in the locking pin. After that, remove the protective sleeve.

[0188] S14. Remove the positioning rod 82, positioning bracket 83 and locking pin 84 mentioned in step S9, replace the protective sleeve with positioning sleeve 81, and install the locking pin by the method mentioned in step S13.

[0189] S15. Separate the connector 7 from the guide rod 2, and move the aiming frame through the sliding frame 5 to approach the proximal hole 101 and achieve positioning;

[0190] S16. Adjust the position of the aiming frame 3 with the connector 7, and then adjust the posture of the two guides 4 so that the positioning cylinder 41 is aligned with the proximal hole 101. Then repeat the locking pin installation steps mentioned in steps S10 to S13 and insert the locking pins into two of the proximal holes 101.

[0191] S17. Remove the aiming frame 3, guide 4, sliding frame 5 and connector 7 together and install them on the other side of the guide rod 2;

[0192] S18. Repeat step S16 to insert a locking pin into the last proximal hole 101.

[0193] S19. Separate the intramedullary nail 1 from the rod 61;

[0194] S20. Use the tail cap holder to screw the tail cap in, so that the tail cap is connected to and locked to the end of the intramedullary nail 1, thereby completing the assembly of the intramedullary nail 1.

[0195] 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 within the protection scope of the present invention.

Claims

1. An intramedullary nail aiming system, characterized in that: The device includes an intramedullary nail (1), a guide rod (2), an aiming frame (3), and a guide element (4). The intramedullary nail (1) is positioned along the X-axis and has three proximal holes (101). The axes of the three proximal holes (101) are parallel to each other at the Y-axis and intersect at the X-axis and Z-axis. Two of the proximal holes (101) are mirror images of each other at the X-axis. The other end of the intramedullary nail (1) is a free end with two parallel distal holes (102) along the Y-axis. The guide rod (2) is positioned along the X-axis and fixed relative to the intramedullary nail (1). The rod (2) overlaps with the intramedullary nail (1) from the Z-axis perspective; the aiming frame (3) is slidably connected to the guide rod (2) and is detachable. The aiming frame (3) has an aiming hole (301) for aiming at the distal hole (102) and two slots (302) corresponding to the proximal hole (101); the guide (4) is provided in both slots (302). The structure of the guide (4) is adjustable so that one of the guides (4) aims at both proximal holes (101) and the other guide (4) aims at one proximal hole (101).

2. The intramedullary nail aiming system as described in claim 1, characterized in that: The guide component (4) includes a positioning cylinder (41), a slider (42), an adjusting screw (43), and a push plate (44). The positioning cylinder (41) is disposed in the slot (302). Two sliders (42) are disposed opposite each other on the circumferential surface of the positioning cylinder (41) and slide in cooperation with the aiming frame (3). The adjusting screw (43) is screwed into the aiming frame (3) by a thread and extends into the slot (302). The push plate (44) is rotatably connected to one end of the adjusting screw (43) located in the slot (302) and abuts against the positioning cylinder (41). The aiming frame (3) has a clearance groove (303) that communicates with the slot (302).

3. The intramedullary nail aiming system as described in claim 2, characterized in that: It also includes a sliding frame (5), the aiming frame (3) includes a first end plate (31), a first connecting part (32), a second connecting part (33), a third connecting part (34), a fourth connecting part (35) and a second end plate (36) connected in sequence, wherein the sliding frame (5) slides with the guide rod (2) and is connected to the first end plate (31); the second connecting part (33) and the third connecting part (34) each have a slot (302), and the axis of one of the proximal holes (101) is perpendicular to the second connecting part (33); among the two proximal holes (101) whose axes are mirrored in the X-axis view, the axis of one of the proximal holes (101) is perpendicular to the third connecting part (34); the second end plate (36) has an aiming hole (301).

4. The intramedullary nail aiming system as described in claim 3, characterized in that: It also includes a handle (6), which includes a rod (61) and a handle (62). One end of the rod (61) is connected to the intramedullary nail (1); one end of the handle (62) is connected to the other end of the rod (61), and the other end of the handle (62) is connected to the guide rod (2). The guide rod (2) has multiple positioning holes (201) and is connected to the handle (62) by a pin. The side of the guide rod (2) has a sliding groove (202), and the sliding frame (5) slides in cooperation with the sliding groove (202).

5. The intramedullary nail aiming system as described in claim 4, characterized in that: It also includes a connector (7), which includes a plug rod (71), a first spring (72) and a circumferential limiting member (73). The plug rod (71) passes through the aiming frame (3) and the sliding frame (5) and is inserted into the guide rod (2). The first spring (72) is sleeved on the plug rod (71). One end of the first spring (72) abuts against the aiming frame (3) and the other end abuts against the sliding frame (5). The circumferential limiting member (73) is used to position the aiming frame (3) circumferentially relative to the plug rod (71).

6. The intramedullary nail aiming system as described in claim 5, characterized in that: When the aiming frame (3) aims at the distal hole (102), the circumferential limiting member (73) includes a plug (731), a connecting rod (732), and a U-shaped rod (733). Two plugs (731) are provided, one partially inserted into the guide rod (2) and the other partially inserted into the first end plate (31) of the aiming frame (3). Two connecting rods (732) are provided, each connecting rod (732) connecting to one of the plugs (731). 1) Connected, the connecting rod (732) passes through the first end plate (31), and the diameter of the connecting rod (732) is smaller than the diameter of the plug (731); the two ends of the U rod (733) are each connected to one of the connecting rods (732), and the U rod (733) is located between the first end plate (31) and the sliding frame (5); the first end plate (31) has guide grooves (304) corresponding to the connecting rod (732) and the plug (731).

7. The intramedullary nail aiming system as described in claim 6, characterized in that: When the aiming frame (3) aims at the proximal hole (101), the circumferential limiting member (73) is a locking bolt; there are two locking bolts, the locking bolts are rotatably connected to the sliding frame (5) and axially positioned, and the locking bolts are threadedly connected to the first end plate (31) of the aiming frame (3).

8. The intramedullary nail aiming system as described in claim 7, characterized in that: It also includes a positioning element (8), and the connecting element (7) further includes a limiting cylinder (74) and a second spring (75), wherein the limiting cylinder (74) is sleeved on the insert rod (71), and the end of the limiting cylinder (74) near the guide rod (2) is closed; the second spring (75) is sleeved on the insert rod (71), one end of the second spring (75) abuts against the sliding frame (5), and the other end is located inside the limiting cylinder (74) and abuts against the closed end of the limiting cylinder (74); the positioning element (8) is inserted into the guide rod (2), the positioning element (8) is arranged along the Z-axis and abuts against the end of the intramedullary nail (1) where the distal hole (102) is opened; the end of the insert rod (71) abuts against the positioning element (8).

9. The intramedullary nail aiming system as described in claim 8, characterized in that: The positioning component (8) includes a positioning sleeve (81), a positioning rod (82), a positioning frame (83), and a locking pin (84). The positioning sleeve (81) is inserted into the guide rod (2), and the positioning sleeve (81) has two opposing waist grooves (801). The positioning sleeve (81) has a through hole (802) corresponding to the insertion rod (71). The positioning rod (82) is inserted into the positioning sleeve (81), and the positioning rod (82) has a reduced diameter section (821) corresponding to the waist groove (801). The positioning frame (83) is snapped onto the guide rod (2). The locking pin (84) is inserted into the positioning frame (83) and corresponds to the reduced diameter section (821).

Images