Clavicular intramedullary nail, clavicular internal fixation device and clavicular intramedullary nail installation assembly

Abstract

The application discloses a clavicle intramedullary nail which comprises an implantation fixing section (12) and an implantation positioning section (14) in sequence. The implantation fixing section has an elastic needle body structure matching the physiological curve of the clavicle, and the implantation positioning section extends linearly along an implantation direction. The implantation positioning section is provided with an operation connecting channel (15) which is arranged at the end of the implantation positioning section along the implantation direction. The side wall of the operation connecting channel is further provided with at least two clamping notches (13) along the implantation direction. An operation device is connected to the operation connecting channel and the clamping notches. The implantation positioning section is further provided with a locking nail connecting channel (16) which penetrates the implantation positioning section and the operation connecting channel along a locking direction which is inclined to the implantation direction. After the clavicle intramedullary nail is implanted, the skin tissue irritation and the skin inflammation can be avoided, the surgical wound is reduced, and the minimally invasive requirement is met. The application further discloses an internal fixation device and an installation assembly with the clavicle intramedullary nail.

Description

Intramedullary nails for the clavicle, intraclavicular fixation devices, and intramedullary nail installation components for the clavicle Technical Field

[0001] This application relates to an internal fixation device, and more particularly to a clavicle intramedullary nail. This application also relates to a clavicle internal fixation device comprising a clavicle intramedullary nail and a clavicle intramedullary nail installation assembly. Background Technology

[0002] In clinical treatment, for patients with clavicle fractures, doctors typically use intramedullary nails to fix the fracture site and ensure rapid healing. Current intramedullary nails utilize flexible intramedullary nails. The specific surgical procedure involves making a surgical incision at the sternal end of the clavicle to expose the bone surface. A perforation is then made at a suitable location on the bone surface to create an intramedullary nail insertion port. The intramedullary nail is then pushed in through this port, crossing the fracture line until its anterior end reaches the medullary cavity at the acromial end of the clavicle, ultimately achieving reduction and fixation of the fracture site.

[0003] However, the above procedure has certain drawbacks. The elastic intramedullary nail relies on its own elastic tension and the friction between the intramedullary cavity wall for fixation, thus its antirotation stability is insufficient. With high patient mobility, its tail end is highly likely to protrude due to muscle traction and skin friction, leading to skin ulceration and infection. To avoid this, a locking screw is usually used to fix the intramedullary nail to the clavicle from the outside. However, the current structure of the intramedullary nail exposes most of the locking screw's tail end and the nail itself to the outside of the clavicle, i.e., in the shoulder tissue. During postoperative recovery, the exposed locking screw and intramedullary nail can irritate the skin tissue, potentially leading to inflammation over time.

[0004] In addition, due to the limitations of its own structure, existing locking screw implantation requires an additional locking screw implantation site to be opened on the clavicle bone surface in addition to the intramedullary nail implantation site. This not only leaves multiple perforations on the clavicle, but also requires a large surgical incision to be made on the patient's clavicle skin before implantation to expose more of the clavicle for the nailing of the intramedullary nail and the locking screw insertion operation. This not only causes additional pain for the patient, but also affects the skin aesthetics during subsequent recovery.

[0005] Therefore, there is an urgent need for a locking intramedullary nail. The design of this nail should not only consider the advantages of elastic tension fixation inherent in elastic intramedullary nails, but also incorporate locking screws to achieve rigid fixation. Furthermore, after the intramedullary nail and locking screws are fixed to the clavicle, neither should be excessively exposed to the tissue, preventing tissue irritation. Simultaneously, both the intramedullary nail and locking screws should be implanted through a single intramedullary nailing site, reducing the surgical incision and meeting the needs of minimally invasive surgery. In addition to achieving the above requirements, it is also necessary to consider how the locking intramedullary nail and its mounting device can cooperate to complete the clavicle mounting operation. If necessary, a locking screw and a mounting device for the locking intramedullary nail that can be used in conjunction with the locking intramedullary nail are also required. Summary of the Invention

[0006] To address the aforementioned problems, this application discloses a locking intramedullary nail, which is an elastic locking intramedullary nail. It can be fixed to the medullary cavity by elastic tension while simultaneously being rigidly fixed to the clavicle with a locking screw, thus improving the anti-rotation capability of the locking intramedullary nail. Furthermore, it minimizes the area of ​​the locking screw exposed within the tissue; that is, the nail body structure of this locking intramedullary nail can be implanted into the medullary cavity, so that only a small portion of the locking screw cap is exposed on the outer side of the clavicle, thereby preventing skin irritation and avoiding skin inflammation. Simultaneously, the intramedullary nail and locking screw can be implanted simultaneously through a single intramedullary nail insertion port, reducing the surgical wound and meeting the needs of patients for minimally invasive surgery. In addition to the above advantages, this locking intramedullary nail can also be used in conjunction with various types of screw-attaching devices to perform clavicle screw-attaching operations. To achieve the above objectives, this application adopts the following technical solution:

[0007] This application provides a clavicle intramedullary nail that can be implanted into the clavicle along an implantation direction via an external operating device, and can also be positioned within the clavicle with a locking screw. The clavicle intramedullary nail sequentially includes an implantation fixation segment and an implantation positioning segment. The implantation fixation segment has an elastic needle structure that matches the physiological curve of the clavicle, and the implantation positioning segment extends linearly along the implantation direction. The implantation positioning segment is provided with an operating connection channel, which is located at the end of the implantation positioning segment along the implantation direction and has internal threads. The sidewall forming the operating connection channel also has at least two engagement notches along the implantation direction. An external operating device is connected through the operating connection channel and engagement notches. The implantation positioning segment also has a locking screw connection channel, which extends through the implantation positioning segment and the operating connection channel along a locking direction inclined to the implantation direction. The entrance side of the locking screw connection channel is closer to the end of the implantation positioning segment than the exit side, and the entrance side of the locking screw connection channel converges into an engagement notch. The exit side of the locking screw connection channel opens into the sidewall of the operating connection channel and has internal threads.

[0008] The implantation positioning segment of this locking intramedullary nail features an elastic nail structure, which can be fixed within the medullary cavity by elastic tension. The implantation fixation segment includes a locking screw connection channel for locking the screw in. Under elastic tension fixation, the intramedullary nail can also be rigidly fixed to the clavicle with a locking screw, thereby improving its stability and anti-rotation ability within the medullary cavity and preventing its tail end from protruding due to muscle traction or skin friction. Furthermore, the implantation fixation segment also includes an operation connection channel for connecting to various operating devices. This allows for the installation of the locking intramedullary nail in the clavicle and the locking of the locking screw within the implantation positioning segment. To further stabilize the connection between the operating device and the locking intramedullary nail, the implantation fixation segment also includes a locking notch, one of which serves as the entrance to the locking screw connection channel. The proximity of these two entrances allows the locking screw to be directly inserted through the intramedullary nail implantation port without the need for a separate locking screw implantation port, thus meeting the needs of patients undergoing minimally invasive surgery. Compared to fixing the tail end of the intramedullary nail to the clavicle with a locking pin on the outside of the clavicle, the above-mentioned matching relationship between the intramedullary nail and the locking pin allows the locking pin and the intramedullary nail to be mostly located in the medullary cavity, except for the pin head structure of the locking pin, thereby avoiding the skin irritation and skin inflammation caused by their exposure to the skin tissue.

[0009] In one illustrative embodiment of the clavicle intramedullary nail, at the engagement notch position on the entrance side of the locking pin connection channel, the inner wall of the connection channel has abutment portion that can abut against the locking pin. This design allows the abutment portion to abut against the locking pin after the locking pin is inserted into the clavicle intramedullary nail, increasing the strength of the locking pin in fixing the nail and preventing unstable insertion that could cause the nail to rotate and dislodge within the medullary cavity.

[0010] In one illustrative embodiment of the intramedullary nail for the clavicle, the sidewall of the operating connection channel has two locking notches along the implantation direction. The openings of the two locking notches are U-shaped, namely the first locking notch and the second locking notch. The first locking notch merges with the entrance side of the nail connection channel; the second locking notch is positioned opposite to the first locking notch, but the opening of the first locking notch is larger than that of the second locking notch, allowing the first locking notch to provide clearance for the locking nail to connect with the clavicle. This U-shaped notch design allows the locking nail to be tilted and locked into the nail connection channel at a certain angle through the first locking notch, avoiding interference from the shape of the first locking notch with the tilted locking of the locking nail. At the same time, the larger first locking notch provides a larger space for the locking nail locked into the implantation positioning segment to connect with the clavicle, enabling the intramedullary nail for the clavicle to be more stably fixed in the medullary cavity. Furthermore, in order to ensure a stable connection between the clavicle and the external operating device along with the internal nail, the second locking notch is designed to be smaller, based on the larger first locking notch, thereby increasing the connection strength with the external device.

[0011] This application also provides a clavicle internal fixation device, which includes the aforementioned intramedullary clavicle nail and locking screw, wherein the locking screw can be disposed along the locking screw connection channel of the intramedullary clavicle nail. The locking screw can be used in conjunction with the aforementioned intramedullary clavicle nail, making the clavicle internal fixation device more firmly fixed within the clavicle, increasing its anti-rotation ability, and improving its stability.

[0012] In one illustrative embodiment of the clavicle fixation device, the locking pin is divided into a first locking segment, a second locking segment, and a locking pin cap along the locking direction from distal to proximal. Both the first and second locking segments are provided with external threads. This segmented design of the locking pin allows the portion of the locking pin that locks into the medullary cavity proximally and the portion that locks into the medullary cavity distally to be set separately according to actual needs. The lengths and thicknesses of these two segments can be different to ensure the stability of the locking pin within the medullary cavity and the locking pin connection channel.

[0013] In one illustrative embodiment of the clavicle internal fixation device, the diameter of the first locking segment is smaller than the diameter of the second locking segment. In actual products, the first locking segment locks sequentially into the medullary cavity and the locking pin connection channel, while the second locking segment locks near the edge of the medullary cavity. This design, with its two gradually increasing diameter segments, ensures that the locking pin as a whole can be stably locked within both the locking pin connection channel of the intraclavicular nail and the clavicle medullary cavity, increasing the force with which the locking pin fixes the intraclavicular nail to the clavicle medullary cavity.

[0014] This application also includes a lockpipe intramedullary nail installation assembly, comprising the aforementioned lockpipe intramedullary nail and a nailing device. The nailing device is connectable to the implantation positioning segment of the lockpipe intramedullary nail. The nailing device includes a connecting protrusion and a connector, wherein the connecting protrusion can engage with a engagement notch along the implantation direction, and the connector can be threaded to an operating connection channel. This design allows the nailing device to cooperate with the aforementioned lockpipe intramedullary nail to complete the nailing operation.

[0015] In one illustrative embodiment of the intramedullary nail installation assembly for the clavicle, the nailing device is a nailer, which includes a nailing sleeve and a nailing connecting rod. The nailing sleeve is provided with a connecting protrusion and a nailing handle. The nailing connecting rod passes through the nailing sleeve and is provided with a connector. By rotating the nailing connecting rod, the connector is connected to the operating connection channel, and the connecting protrusion engages with the engagement notch, thus achieving a tight connection between the nailer and the intramedullary nail for the clavicle.

[0016] In one illustrative embodiment of the intramedullary nail installation assembly, the nailing device further includes a clamping connector and a clamping device. The clamping connector has a clamping connecting rod and a clamping connecting sleeve sleeved on the clamping connecting rod. The clamping connecting rod has a connecting head, and the clamping connecting sleeve has a connecting protrusion. The clamping device is capable of clamping the clamping connector. By connecting the clamping connector to the intramedullary nail to protect the implantation positioning segment of the intramedullary nail from deformation, the clamping device clamps the clamping connector to complete the nailing operation of the intramedullary nail.

[0017] In one illustrative embodiment of the intramedullary nail installation assembly, it further includes a drilling guide device. The drilling guide device has a positioning protrusion capable of engaging with an engagement notch along the implantation direction, and a drilling channel is formed within the drilling guide device. After the positioning protrusion is positioned with the engagement notch, the drilling channel can be aligned with the nail connection channel along the locking direction. Connecting the drilling guide device to the implantation positioning segment of the intramedullary nail allows for the creation of a nail connection channel within the implantation positioning segment of the intramedullary nail.

[0018] The preferred embodiments will be described below in a clear and easy-to-understand manner, with reference to the accompanying drawings, to further explain the above-mentioned characteristics, technical features, advantages, and implementation methods of the intracranial nail, intracranial fixation device, and intracranial nail installation assembly. Attached Figure Description

[0019] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0020] Figure 1 is a schematic structural diagram illustrating one embodiment of the intramedullary nail for locking the bone marrow.

[0021] Figure 2 is a structural cross-sectional view illustrating a schematic embodiment of the implantation positioning segment.

[0022] Figure 3 is a schematic diagram illustrating one embodiment of the implantation positioning segment.

[0023] Figure 4 is a three-dimensional structural diagram of the implanted positioning segment shown in Figure 3 from another angle.

[0024] Figure 5 is a schematic diagram illustrating one embodiment of the specific use of intramedullary nails.

[0025] Figure 6 is a partially enlarged view of one schematic embodiment of the locking relationship between the locking pin and the intramedullary nail shown in Figure 5.

[0026] Figure 7 is a schematic diagram illustrating one embodiment of the locking pin.

[0027] Figure 8 is a partially enlarged schematic representation of another embodiment of the locking relationship between the locking pin and the intramedullary nail shown in Figure 5.

[0028] Figure 9 is a schematic diagram illustrating one embodiment of the nailer.

[0029] Figure 10 is a schematic structural diagram illustrating one embodiment of the connection between the stapler and the intramedullary nail.

[0030] Figure 11 is a schematic structural diagram illustrating one embodiment of the connection between the clamping connector and the intramedullary nail.

[0031] Figure 12 is a schematic structural diagram illustrating one embodiment of the clamping device.

[0032] Figure 13 is a view of the clamping device in Figure 12 from direction E.

[0033] Figure 14 is a schematic structural diagram illustrating one embodiment of the clamping relationship between the clamping device and the clamping connector.

[0034] Figure 15 is a schematic structural diagram illustrating one embodiment of the drilling guide device.

[0035] Figure 16 is a schematic structural diagram illustrating one embodiment of the connection between the drilling guide device and the intramedullary nail in the lock.

[0036] Figure 17 is a structural cross-sectional view illustrating a schematic embodiment of the connection between the drilling guide device and the intramedullary nail.

[0037] Label Explanation

[0038] 10. Locking intramedullary nail; 12. Implantation fixation segment; 13. Locking notch; 131. First locking notch; 132. Second locking notch; 14. Implantation positioning segment; 15. Operation connection channel; 16. Locking nail connection channel; 17. Abutment part; 20. Locking nail; 22. First locking segment; 26. Second locking segment; 28. Locking nail cap; 31. Connecting protrusion; 32. Connector head; 40. Nail inserter; 41. Nail inserting sleeve; 411. Nail inserting handle; 43. Nail inserting connecting rod; 50. Clamping connector; 51. Clamping connecting rod; 52. Clamping connecting sleeve; 60. Clamping device; 61. Clamping part; 611. Clamp; 70. Drilling guide device; 71. Positioning protrusion; 72. Drilling channel; 80. Clavicle; 81. Intramedullary nail implantation site. Detailed Implementation

[0039] To provide a clearer understanding of the technical features, objectives, and effects of this application, specific embodiments of this application are now described with reference to the accompanying drawings. In the drawings, the same reference numerals indicate components with the same or similar structures but the same function.

[0040] In this document, “illustrative” means “serving as an example, illustration or description”, and any illustration or implementation described herein as “illustrative” should not be construed as a more preferred or advantageous technical solution.

[0041] Figure 1 is a schematic structural diagram illustrating one embodiment of the intramedullary nail for the clavicle. As shown in Figure 1, the intramedullary nail 10 for the clavicle includes an implantation fixation segment 12 and an implantation positioning segment 14. The implantation fixation segment 12 is the main part, used to implant into the medullary cavity to fix the clavicle fracture. Its structural design is derived from extensive clinical trials and data analysis, and is an elastic needle structure that matches the physiological curve of the clavicle. This part can be selected in different lengths according to the needs of different patients. The design of the elastic needle allows it to be fixed in the medullary cavity by its own elastic tension. The implantation positioning segment 14 extends linearly along the implantation direction A and is designed at the end of the implantation fixation segment 12.

[0042] Those skilled in the art will understand that the implantation direction here refers to the direction in which, after the implantation fixation segment 12 of the intracranial nail is initially implanted into the clavicle, the intracranial nail 10 is moved to the final desired internal fixation position by pushing the implantation positioning segment 14 along an implantation direction. That is, the implantation direction is also the direction of operation when using external manipulation devices (such as nail installers).

[0043] As shown in Figure 2, and in conjunction with Figures 3 and 4, the implantation positioning segment 14 has a cylindrical structure. The implantation positioning segment 14 is provided with an operation connection channel 15, which is located at the end of the implantation positioning segment 14 along the implantation direction A. This operation connection channel 15 is used to connect various types of mounting devices and has an internal thread structure, as shown in Figures 2 and 3. The sidewall forming the operation connection channel 15 also has at least two engaging notches 13 along the implantation direction A. The mounting device is connected through the engagement of these engaging notches 13 with the operation connection channel 15. As shown in Figure 3, the implantation positioning segment 14 can have two engaging notches 13, which are arranged opposite each other. As shown in Figure 2, the implantation positioning segment 14 is also provided with a locking pin connection channel 16. The locking pin connection channel 16 extends through the implantation positioning segment 14 and the operation connection channel 15 along a locking direction B inclined to the implantation direction A. The locking pin connection channel 16 includes an inlet side and an outlet side. The inlet side is closer to the end of the implantation positioning segment 14 than the outlet side, that is, the inlet side is closer to the opening at the end of the implantation positioning segment 14. The inlet side of the locking pin connection channel 16 converges into a locking notch 13. The outlet side of the locking pin connection channel 16 opens into the side wall of the operation connection channel 15, and its opening is on the side wall opposite to the inlet side. The inner wall of the locking pin connection channel 16 is also provided with an internal thread structure. In actual use, the locking pin 20 enters the implantation positioning segment 14 at an angle through the locking notch 13 located above the implantation positioning segment 14 in Figure 2 and passes through the locking pin connection channel 16. The locking pin 20 exits through the outlet side of the locking pin connection channel 16 located below the implantation positioning segment 14 to realize the locking operation of the locking pin 20.

[0044] The specific usage of the intramedullary nail 10 during surgery is as follows:

[0045] As shown in Figures 5 and 6, after the patient fractures the clavicle 80, the surgeon makes a surgical incision at the acromion of the patient's shoulder to expose the clavicle beneath the skin. An intramedullary nailing port 81 is created at the acromion end of the clavicle. An external nailing device is connected to the operating connection channel 15 and locking notch 13 of the intramedullary nail 10. The intramedullary nail 10 is gently rotated and inserted into the medullary cavity of the clavicle 80 through the intramedullary nailing port 81 using the nailing device. Its implantation fixation segment 1... 2. The positioning segment 14 is implanted through the fracture line into the medullary cavity of the clavicle 80, close to the intramedullary nail implantation port 81. After removing the upper nail device, a locking nail 20 is inserted obliquely through the intramedullary nail implantation port 81 and locked into the positioning segment 14 through the locking notch 13, thus fixing the intramedullary nail 10 in the medullary cavity of the clavicle 80. Most of the locking nail 20 is located in the medullary cavity, and its nail head structure is fixed to the lateral side of the clavicle 80. After the operation, the fracture site can heal during the fixation connection of the implanted fixation segment 12.

[0046] During the above-mentioned operation, the intramedullary nail 10 is not only fixed in the medullary cavity of the clavicle 80 by the elastic tension of its implantation fixation segment 12, but the locking of the locking nail 20 also provides secondary fixation of the intramedullary nail 10 in the clavicle 80, improving its resistance to rotation in the medullary cavity of the clavicle 80, thereby preventing its tail end from rotating and protruding from the skin due to muscle traction and other reasons. At the same time, the design of the implantation positioning segment 14 of the intramedullary nail 10 ensures that the nailing device can be connected to the intramedullary nail 10 so that the locking operation of the locking nail 20 can be realized at the same time as the nailing operation is completed in the clavicle 80. The locking notch 13 designed in the implantation positioning segment 14 can not only cooperate with the connection operation device, but also serve as the entrance for the locking nail 20 to be locked in. In this way, in actual surgery, the locking nail 20 can be directly locked in through the intramedullary nail implantation port 81 on the clavicle without the need for a separate locking nail implantation port, thereby meeting the needs of patients for minimally invasive surgery. Furthermore, compared to the case where the locking nail 20 and the intramedullary nail 10 are mostly exposed in the skin tissue after locking, the above-mentioned cooperation between the intramedullary nail 10 and the locking nail 20 ensures that, except for the nail head structure of the locking nail 20, the locking nail 20 and the intramedullary nail 10 are mostly located in the medullary cavity, thereby avoiding the two from being exposed in the skin tissue and causing skin irritation and inflammation.

[0047] As shown in Figure 2, in order to increase the strength of the locking pin 20 in fixing the intramedullary nail 10, the inner wall of the operating connection channel 15 at the entrance side of the locking pin connection channel 16, i.e., at the position of the engagement notch 13 above the implantation positioning section 14 as shown in Figure 2, also has a stop portion 17 that can abut against the locking pin 20. When the locking pin 20 is locked into the intramedullary nail 10, the pin head structure of the locking pin 20 abuts against the stop portion 17, thereby preventing the locking pin 20 from shaking inside the intramedullary nail 10, and the abutment between the stop portion 17 and the locking pin 20 can increase the strength of the locking pin 20 in fixing the intramedullary nail 10.

[0048] As shown in Figures 2, 3, and 4, the two locking notches 13 formed on the sidewall of the operation connection channel 15 along the implantation direction A are both U-shaped, and are respectively the first locking notch 131 and the second locking notch 132. The first locking notch 131 is the locking notch 13 that merges with the entrance side of the locking pin connection channel 16. The second locking notch 132 is set opposite to the first locking notch 131. Those skilled in the art will understand that the first locking notch 131 is the locking notch above the implantation positioning segment 14 shown in Figure 2, and the second locking notch 132 is located below. The opening of the first locking notch 131 is larger than that of the second locking notch 132, so that the first locking notch 131 leaves clearance space for the locking pin 20 to connect with the clavicle. The U-shaped notch design provides clearance, allowing the locking pin 20 to be tilted at a certain angle and locked into the locking pin connection channel 16 through the first engagement notch 131. This avoids the shape of the first engagement notch 131 interfering with the tilted locking of the locking pin 20. As shown in Figures 5 and 6, after the locking pin 20 is locked into the implantation positioning segment 14 of the intramedullary nail 10, the locking pin 20 at the intramedullary nail implantation port 81, that is, the small part of the locking pin 20 near the nail head (the part of the locking pin 20 shown in the dashed box in Figure 6), is also located in the medullary cavity. The larger first engagement notch 131 can provide a larger space for this small part of the locking pin 20 to connect with the medullary cavity of the clavicle 80. In order to make the intramedullary nail 10 of the clavicle stablely connected to the external nailing device, the second engagement notch 132 is designed to be smaller based on the larger first engagement notch 131, thereby increasing the connection strength with the external nailing device.

[0049] As shown in Figure 6, and in conjunction with Figure 2, since the locking pin connecting channel 16 has an angle α with the implantation direction A, that is, after the locking pin 20 is locked into the implantation positioning section 14, the locking direction B of the locking pin 20 has an angle α with the implantation direction A. In one illustrative embodiment, the range of this angle α is 30°≤α≤45°. Within this tilt range, it is ensured that the locking pin 20 can firmly lock the intramedullary nail 10 into the medullary cavity of the clavicle 80, preventing it from rotating within the medullary cavity, thereby increasing its resistance to rotation.

[0050] In addition to the aforementioned intraclavicular nail 10, this design also includes an intraclavicular fixation device, which includes the aforementioned intraclavicular nail 10 and a locking pin 20. The locking pin 20 can be set along the locking pin connection channel 16 of the intraclavicular nail 10. The design of the locking pin 20 can cooperate with the aforementioned intraclavicular nail 10 to complete the fixation operation.

[0051] Specifically, as shown in Figure 7, and in conjunction with Figures 5 and 6, the locking pin 20 is divided into a first locking section 22, a second locking section 26, and a locking pin cap 28 along the locking direction B from its distal end to its proximal end. Both the first locking section 22 and the second locking section 26 are provided with external threads. As shown in Figure 8, the first locking section 22 is the main part of the locking pin 20 that locks with the medullary cavity, locking most of the medullary cavity. The first locking section 22 is divided into two parts: one part locks into the distal medullary cavity, and the other part locks into the locking pin connecting channel 16. The second locking section 26 is the structure of the part of the locking pin 20 near the locking pin cap 28, locking a small part of the medullary cavity. After the locking pin 20 is locked into the medullary cavity, only the locking pin cap 28 is exposed above the clavicle. In the actual product, the locking pin cap... The thickness of 28 can be 0.7mm, which allows the locking cap 28 to be firmly fixed to the clavicle 80 while minimizing its exposed area in the tissue, thereby reducing the patient's foreign body sensation. In addition, this segmented design of the locking nail 20 allows the part of the locking nail 20 that locks into the medullary cavity proximally and the part of the locking nail 20 that locks into the medullary cavity distally to be set separately according to actual needs. The length and thickness of these two segments can be different to ensure the stability of the locking nail 20 in the medullary cavity and the locking nail connection channel 16.

[0052] In one illustrative embodiment of the locking pin, the diameter of the first locking segment is less than the diameter of the second locking segment. Specifically, in actual products, the diameter of the first locking segment 22 can be 2mm, and the diameter of the second locking segment 26 is set to be greater than 2mm. This design method of gradually increasing diameters in two segments ensures that the locking pin 20 as a whole can be stably locked in the locking pin connection channel 16 of the intramedullary nail 10 and in the intramedullary cavity of the clavicle, thereby increasing the force with which the locking pin 20 fixes the intramedullary nail 10 in the intramedullary cavity.

[0053] In another illustrative embodiment of the locking pin, the diameter of the second locking segment 26 can gradually increase from the distal end to the proximal end, as shown in Figure 8. The diameter of the second locking segment 26 gradually increases from the end near the intramedullary nail 10 to the end near the locking pin cap 28, thereby increasing the locking force of the locking pin 20 at the edge of the medullary cavity and preventing the locking pin 20 and the intramedullary nail 10 from dislodging from the medullary cavity through the intramedullary nail implantation port 81 opened at the clavicle.

[0054] In addition to the aforementioned intramedullary nail 10 and locking nail 20, this design also includes an intramedullary nail installation assembly, which includes the aforementioned intramedullary nail 10 and locking nail 20, and also includes a nail-attaching device, as shown in Figure 9. The nail-attaching device can be connected to the implantation positioning segment 14 of the intramedullary nail 10, and the nail-attaching device includes a connecting protrusion 31 and a connector 32, wherein the connecting protrusion can engage with the engagement notch 13 along the implantation direction A, and the connector 32 can be threaded into the operating connection channel 15.

[0055] The nailing device includes a nailer 40, as shown in Figure 9. The nailer 40 includes a nailing sleeve 41 and a nailing connecting rod 43. The nailing sleeve 41 has a connecting protrusion 31 and a nailing handle 411. The nailing connecting rod 43 passes through the nailing sleeve 41 and has a connector 32. Referring to Figures 9 and 10, in the actual product, one end of the nailing connecting rod is the operating end, and the other end is the connector 32. The operator holds the nailing handle 411 with one hand and rotates the operating end of the nailing connecting rod 43 with the other hand. The connector 32 rotates relative to the nailing sleeve 41 and connects to the implantation positioning segment of the intramedullary nail 10. After connection, the intramedullary nail 10 is implanted into the clavicle 80 using the nailer 40.

[0056] The nailing device also includes a clamping connector 50 and a clamping device 60. Figure 11 shows a schematic diagram of the connection between the clamping connector and the intramedullary nail 10. The clamping connector 50 has a clamping connecting rod 51 and a clamping connecting sleeve 52 sleeved on the clamping connecting rod 51. One end of the clamping connecting rod 51 has a connector head 32, and the clamping connecting sleeve 52 has a connecting protrusion 31. Figure 12 shows the clamping device 60. One end of the clamping device 60 is provided with a clamping part 61, which can clamp one end of the clamping connector 50. As shown in Figure 13, in the actual product, the clamping part 61 includes three clips 611. The three clips 611 move towards the center to clamp the clamping connector 50. The other end of the clamping device 60 relative to the clamping part 61 also has an operating structure that can control the clamping of the clamping part 61. As shown in Figure 14, when the clamping connector 50 is connected to the intracranial nail 10, the clamping device 60 can clamp the clamping connector 50 and implant the intracranial nail 10 into the clavicle 80 along the implantation direction, which can also complete the nailing operation.

[0057] In order to create a locking nail connection channel 16 inside the implantation positioning segment 14 of the intramedullary nail 10, the intramedullary nail installation assembly also includes a drilling guide device 70, as shown in Figures 15 and 16. The drilling guide device 70 has a positioning protrusion 71 that can engage with the engagement notch 13 along the implantation direction A. As shown in Figure 17, a drilling channel 72 is also formed inside the drilling guide device 70. When the positioning protrusion 71 is positioned with the engagement notch 13, the drilling channel 72 can be aligned with the locking nail connection channel 16 along the engagement direction B. Then, the operator can open the locking nail connection channel 16 inside the implantation positioning segment 14 of the intramedullary nail 10 through the drilling channel 72 in the direction of the arrow in Figure 17.

[0058] To keep the drawings concise, only the parts relevant to this application are shown schematically in each drawing, and they do not represent the actual structure of the product. In addition, to make the drawings concise and easy to understand, in some drawings, only one of the components with the same structure or function is shown schematically, or only one of them is labeled.

[0059] It should be understood that although this specification describes various embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0060] The detailed descriptions listed above are merely specific descriptions of feasible embodiments of this application and are not intended to limit the scope of protection of this application. All equivalent implementations or modifications made without departing from the spirit of the art of this application, such as combinations, divisions or repetitions of features, should be included within the scope of protection of this application.

Claims

1. A clavicle intramedullary nail (10), which can be implanted into the clavicle along an implantation direction via an external operating device, and can also be positioned within the clavicle with a locking screw (20), characterized in that, The intramedullary nail (10) comprises, in sequence: an implantation fixation segment (12), which is an elastic needle structure, and an implantation positioning segment (14), which extends linearly along the implantation direction; wherein, the implantation positioning segment (14) is provided with an operation connection channel (15), the operation connection channel (15) is opened at the end of the implantation positioning segment (14) along the implantation direction, the operation connection channel (15) is provided with internal threads, and the sidewall of the operation connection channel (15) also forms at least two engagement notches (13) along the implantation direction, through which the operation device is externally connected; the implantation positioning segment (12) is provided with an elastic needle structure, and the intramedullary nail (14) extends linearly along the implantation direction; the implantation positioning segment (12) is provided with an elastic needle structure, and the intramedullary nail (14) extends linearly along the implantation direction. 4) A locking pin connection channel (16) is also provided. The locking pin connection channel (16) extends through the implantation positioning section (14) and the operation connection channel (15) along a locking direction inclined to the implantation direction. The entrance side of the locking pin connection channel (16) is closer to the end of the implantation positioning section (14) than the exit side. The entrance side of the locking pin connection channel (16) converges into a locking notch (13), so that the locking notch (13) can not only cooperate with the connection operation device, but also cooperate with the locking pin (20). The exit side of the locking pin connection channel (16) opens into the side wall of the operation connection channel (15) and is provided with internal threads.

2. The intramedullary nail (10) according to claim 1, characterized in that, At the engagement notch (13) on the entrance side of the locking pin connection channel (16), the inner wall of the operation connection channel (15) is formed with an abutment part (17) that can abut against the locking pin (20).

3. The intramedullary nail (10) according to claim 1, characterized in that, The sidewall of the operation connection channel (15) has two locking notches (13) formed along the implantation direction. The opening shape of the two locking notches (13) is U-shaped, namely: a first locking notch (131), which merges with the entrance side of the locking pin connection channel (16); and a second locking notch (132), which is opposite to the first locking notch (131). The opening of the first locking notch (131) is larger than that of the second locking notch (132), so that the first locking notch (131) leaves a clearance space for the locking pin (20) to connect with the clavicle.

4. An internal fixation device for the clavicle, characterized in that, It includes: a lock-on intramedullary nail (10) as claimed in any one of claims 1 to 3; and a lock pin (20) which is disposed along a lock pin connection channel (16) of the lock-on intramedullary nail (10).

5. The clavicle internal fixation device according to claim 4, characterized in that, The locking pin (20) is divided into a first locking section (22), a second locking section (26) and a locking pin cap (28) along the locking direction from the distal end to the proximal end. Both the first locking section (22) and the second locking section (26) are provided with external threads.

6. The clavicle internal fixation device according to claim 5, characterized in that, The diameter of the first locking segment is less than the diameter of the second locking segment.

7. A lock-on intramedullary nail installation assembly, characterized in that, It includes: Cling intramedullary nail (10) as described in any one of claims 1 to 3; The device includes a mounting device that can be connected to the implantation positioning segment (14) of the intramedullary nail (10). The mounting device includes: a connecting protrusion (31) that can engage with the engagement notch (13) along the implantation direction; and a connector (32) that can be threaded to the operating connection channel (15).

8. The intramedullary nail installation assembly according to claim 7, characterized in that, The nailing device is a nailer (40), which includes: a nailing sleeve (41) with the connecting protrusion (31) and a nailing handle (411); and a nailing connecting rod (43) which passes through the nailing sleeve (41) and has the connector (32).

9. The intramedullary nail installation assembly according to claim 7, characterized in that, The mounting device includes: a clamping connector (50) having a clamping connecting rod (51) and a clamping connecting sleeve (52) sleeved on the clamping connecting rod (51), the clamping connecting rod (51) having the connecting head (32) and the clamping connecting sleeve (52) having the connecting protrusion (31); and a clamping device (60) capable of clamping the clamping connector (50).

10. A lock-on intramedullary nail installation assembly, characterized in that, It includes: Cling intramedullary nail (10) as described in any one of claims 1 to 3; The drilling guide device (70) has a positioning protrusion (71) that can engage with the engagement notch (13) along the implantation direction, and a drilling channel (72) is also formed in the drilling guide device (70). After the positioning protrusion (71) is positioned with the engagement notch (13), the drilling channel (72) can be aligned with the locking pin connection channel (16) along the locking direction.

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