Clavicle intramedullary nail, clavicle internal fixing device and clavicle intramedullary nail mounting assembly

Abstract

The invention discloses a clavicle intramedullary nail. The clavicle intramedullary nail sequentially comprises an implantation fixing section (12) and an implantation positioning section (14). The implantation fixing section is provided with an elastic needle body structure matched with the physiological curve of the clavicle, the implantation positioning section linearly extends in the implantation direction, the implantation positioning section is provided with an operation connecting channel (15), and the operation connecting channel is formed in the end of the implantation positioning section in the implantation direction; at least two clamping notches (13) are further formed in the side wall forming the operation connecting channel in the implanting direction, and an operation device is externally connected through the operation connecting channel and the clamping notches; the implantation positioning section is further provided with a lock nail connecting channel (16), the lock nail connecting channel penetrates through the implantation positioning section and the operation connecting channel in the locking direction inclined to the implantation direction, and after the lock intramedullary nail is nailed, skin tissue irritation can be avoided, skin inflammation is avoided, surgical wounds are reduced, and the minimally invasive requirement is met. The invention further discloses an internal fixing device with the intramedullary clavicle nail and a mounting assembly.

Description

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: 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.

[0007] 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.

[0008] 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.

[0009] 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.

[0010] 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.

[0011] 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.

[0012] 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.

[0013] 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.

[0014] 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.

[0015] 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.

[0016] 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.

[0017] 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

[0018] 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: Figure 1 A schematic diagram illustrating one embodiment of a lockbone intramedullary nail.

[0019] Figure 2 A structural cross-sectional view illustrating an illustrative embodiment of the implantation positioning segment.

[0020] Figure 3 A schematic diagram illustrating one possible implementation of the implantation positioning segment.

[0021] Figure 4 yes Figure 3 The diagram shows a three-dimensional structure of the implanted positioning segment from another angle.

[0022] Figure 5 A schematic diagram illustrating a specific implementation method of locking the intramedullary nail.

[0023] Figure 6 yes Figure 5A partially enlarged view of a schematic embodiment of the locking relationship between the locking pin and the intramedullary nail.

[0024] Figure 7 A structural diagram illustrating one possible embodiment of the locking pin.

[0025] Figure 8 yes Figure 5 A partially enlarged view of another schematic embodiment illustrating the locking relationship between the locking pin and the intramedullary nail.

[0026] Figure 9 A schematic diagram illustrating one embodiment of the nailer.

[0027] Figure 10 A schematic diagram illustrating a possible embodiment of the connection between the stapler and the intramedullary nail.

[0028] Figure 11 A schematic diagram illustrating a structural embodiment of the connection between the clamping connector and the intramedullary nail.

[0029] Figure 12 A schematic diagram illustrating one embodiment of the clamping device.

[0030] Figure 13 for Figure 12 View of the clamping device from direction E.

[0031] Figure 14 A schematic structural diagram illustrating an embodiment of the clamping relationship between the clamping device and the clamping connector.

[0032] Figure 15 A schematic diagram illustrating one embodiment of a drilling guide device.

[0033] Figure 16 A schematic diagram illustrating a possible embodiment of the connection between a drilling guide device and a lockbone intramedullary nail.

[0034] Figure 17 A structural cross-sectional view illustrating a schematic embodiment of the connection between the drilling guide device and the intramedullary nail.

[0035] Label Explanation 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

[0036] 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.

[0037] 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.

[0038] Figure 1 A schematic diagram illustrating one embodiment of the intramedullary nail. (Example) Figure 1 The intramedullary nail 10 shown comprises an implantation fixation segment 12 and an implantation positioning segment 14. The implantation fixation segment 12 is the main body, 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 elastic needle design can 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.

[0039] 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).

[0040] like Figure 2 As shown, combined with Figure 3 , Figure 4The implantation positioning section 14 has a cylindrical structure and is provided with an operation connection channel 15. The operation connection channel 15 is opened at the end of the implantation positioning section 14 along the implantation direction A. It is used to connect various types of mounting devices and is provided with an internal thread structure, such as... Figure 2 , Figure 3 As shown, the sidewall forming the operating connection channel 15 also has at least two engaging notches 13 along the implantation direction A, through which an external pin device is attached. Figure 3 As shown, the implantation positioning segment 14 can have two engaging notches 13, which are positioned opposite each other. Figure 2 As shown, the implantation positioning section 14 is also provided with a locking pin connection channel 16. The locking pin connection channel 16 extends through the implantation positioning section 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 section 14 than the outlet side, that is, the inlet side is closer to the opening at the end of the implantation positioning section 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 passes through... Figure 2 The locking notch 13 located above the implantation positioning section 14 is tilted into the implantation positioning section 14 and connected to the locking pin channel 16. The locking pin 20 is exited from the outlet side of the locking pin connection channel 16 located below the implantation positioning section 14 to realize the locking operation of the locking pin 20.

[0041] The specific usage of the intramedullary nail 10 during surgery is as follows: like Figure 5 Combination Figure 6As shown, after the patient fractured clavicle 80, the doctor made a surgical incision at the acromion of the patient's shoulder to expose the clavicle under the skin tissue. An intramedullary nailing port 81 was made at the acromion end of the clavicle. The external mounting device was connected to the operation connection channel 15 and the locking notch 13 of the intramedullary nail 10. The intramedullary nail 10 was gently rotated and inserted into the medullary cavity of the clavicle 80 through the intramedullary nailing port 81 using the mounting device. Its implantation fixation segment 12 passed through the fracture line, and the implantation positioning segment 14 was also inserted into the medullary cavity of the clavicle 80 and close to the intramedullary nailing port 81. After removing the mounting device, a locking nail 20 was tilted through the intramedullary nailing port 81 and locked into the implantation positioning segment 14 through the locking notch 13 and into the medullary cavity of the clavicle 80 to fix the intramedullary nail 10 in the medullary cavity of the clavicle 80. Most of the locking nail 20 was located in the medullary cavity, and its nail head structure was fixed to the outside of the clavicle 80. After the surgery, during the process of implanting the fixation segment 12 to fix the fracture site, the fracture site can heal.

[0042] 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.

[0043] like Figure 2 As shown, in order to increase the strength of the locking pin 20 in fixing the intramedullary nail 10, at the entrance side of the locking pin connecting channel 16, i.e. Figure 2As shown, at the position of the locking notch 13 above the implantation positioning segment 14, the inner wall of the operation connection channel 15 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 in 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.

[0044] like Figure 2 , Figure 3 , Figure 4 As shown, the two engaging notches 13 formed on the sidewall of the operating connection channel 15 along the implantation direction A are both U-shaped, and are respectively the first engaging notch 131 and the second engaging notch 132. The first engaging notch 131 is the engaging notch 13 that merges with the entrance side of the locking pin connection channel 16. The second engaging notch 132 is arranged opposite to the first engaging notch 131. Those skilled in the art will understand that the first engaging notch 131 is the one mentioned above. Figure 2 The first engagement notch 131 is located above the implantation positioning segment 14, while the second engagement notch 132 is located below it. The opening of the first engagement notch 131 is larger than that of the second engagement notch 132, allowing the first engagement notch 131 to provide clearance for the locking pin 20 to connect with the clavicle. This U-shaped notch design provides clearance, allowing the locking pin 20 to be tilted at a certain angle through the first engagement notch 131 into the locking pin connection channel 16, preventing the shape of the first engagement notch 131 from interfering with the tilting and locking of the locking pin 20. Figure 5 , Figure 6 It can be seen that after the locking screw 20 is locked into the implantation positioning segment 14 of the intramedullary nail 10, the locking screw 20 located at the intramedullary nail implantation site 81, that is, the small part of the locking screw 20 near the nail head (e.g. Figure 6 The portion of the locking nail 20 shown in the dashed box is also located within the medullary cavity. The larger first engagement notch 131 provides a larger space for this small portion of the locking nail 20 to connect with the medullary cavity of the clavicle 80. In order to ensure a stable connection between the intramedullary nail 10 and the external mounting 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 mounting device.

[0045] like Figure 6 As shown, combined with Figure 2As shown, 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 in the medullary cavity, thereby increasing its ability to resist rotation.

[0046] 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.

[0047] Specifically, such as Figure 7 As shown, combined with Figure 5 , Figure 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. Figure 8 As shown, the first locking segment 22 is the main part of the locking pin 20 that locks to the medullary cavity. It locks to most of the medullary cavity. The first locking segment 22 is divided into two parts: one part locks to the distal medullary cavity, and the other part locks to the locking pin connecting channel 16. The second locking segment 26 is the structure of the locking pin 20 near the locking pin cap 28, which locks to 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 28... The thickness of 8 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 pin 20 allows the part of the locking pin 20 that locks into the medullary cavity proximally and the part of the locking pin 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 pin 20 in the medullary cavity and the locking pin connection channel 16.

[0048] 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.

[0049] 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, i.e., as shown... Figure 8 As shown, the diameter of the second locking segment 26 gradually increases from the end near the intramedullary nail 10 to the end near the locking nail cap 28, thereby increasing the locking force of the locking nail 20 at the edge of the medullary cavity and preventing the locking nail 20 and the intramedullary nail 10 from coming out of the medullary cavity through the intramedullary nail implantation port 81 opened at the clavicle.

[0050] In addition to the aforementioned intramedullary nail 10 and locking pin 20, this design also includes an intramedullary nail mounting assembly, which includes the aforementioned intramedullary nail 10 and locking pin 20, and also includes a nail-attaching device, such as... Figure 9 As shown, the upper nailing device can be connected to the implantation positioning segment 14 of the intramedullary nail 10, and the upper nailing 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.

[0051] The nailing device includes a nailer 40. Figure 9 The diagram shown is a structural schematic of the nailer 40. Figure 9 As shown, the nailer 40 includes a nailing sleeve 41 and a nailing connecting rod 43. The nailing sleeve 41 is provided with a connecting protrusion 31 and a nailing handle 411. The nailing connecting rod 43 passes through the nailing sleeve 41 and is provided with a connector 32. Figure 9 , Figure 10 As shown, in the actual product, one end of the upper nail connecting rod is the operating end, and the other end is the connector 32. The operator holds the upper nail handle 411 with one hand and rotates the operating end of the upper nail connecting rod 43 with the other hand. The connector 32 rotates relative to the upper nail sleeve 41 and connects to the implantation positioning segment of the intramedullary nail 10. After the connection is completed, the intramedullary nail 10 is implanted into the clavicle 80 through the nailer 40.

[0052] The mounting device also includes a clamping connector 50 and a clamping device 60, such as Figure 11 The diagram shows the structural relationship 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 The image shows a clamping device 60. One end of the clamping device 60 is provided with a clamping part 61, which is capable of clamping one end of the connector 50, such as... Figure 13As shown, in the actual product, the clamping part 61 includes three clamps 611. The three clamps 611 move towards the center to clamp the connector 50. The clamping device 60 also has an operating structure at the other end of the clamping part 61 that can control the clamping of the clamping part 61, such as... Figure 14 As shown, 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.

[0053] In order to create a locking nail connection channel 16 within the implantation positioning segment 14 of the intramedullary nail 10, the intramedullary nail installation assembly also includes a drilling guide device 70, such as... Figure 15 , Figure 16 As shown, the drilling guide device 70 has a positioning protrusion 71 that can engage with the engagement notch 13 along the implantation direction A, and as Figure 17 As shown, a drilling channel 72 is also formed within the drilling guide device 70. When the positioning protrusion 71 is positioned to the engaging notch 13, the drilling channel 72 can be aligned with the locking nail connection channel 16 along the locking direction B. Then, the operator can insert the intramedullary nail 10 into the implantation positioning segment 14 of the intramedullary nail 10 through the drilling channel 72. Figure 17 The locking pin connection channel 16 is opened in the direction of the middle arrow.

[0054] 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.

[0055] 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.

[0056] 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: The implanted fixation segment (12) is an elastic needle structure, and An implantation positioning segment (14) extends linearly along the implantation direction; in, 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 an internal thread. The side wall of the operation connection channel (15) is also formed with at least two engagement notches (13) along the implantation direction. The operation device is externally connected through the operation connection channel (15) and the engagement notches (13). The implantation positioning section (14) is also provided with a locking pin connection channel (16), which 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, and the entrance side of the locking pin connection channel (16) merges into a locking notch (13). 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 operating connection channel (15) has two engagement notches (13) formed along the implantation direction. The openings of the two engagement notches (13) are U-shaped, and are as follows: The first engaging notch (131) merges with the entrance side of the locking pin connecting channel (16); The second engagement notch (132) is disposed opposite to the first engagement notch (131); The opening of the first engagement notch (131) is larger than that of the second engagement notch (132), so that the first engagement notch (131) provides clearance for the locking pin (20) to connect with the clavicle.

4. An internal fixation device for the clavicle, characterized in that, It includes: Cling intramedullary nail (10) as described in any one of claims 1 to 3; and Locking pin (20), which can be disposed along the locking pin connection channel (16) of the intramedullary nail (10) of the lock.

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; and The mounting device is connectable to the implantation positioning segment (14) of the intramedullary nail (10), the mounting device comprising: A connecting protrusion (31) is capable of engaging with the engagement notch (13) along the implantation direction. Connector (32), which 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), and the nailer (40) includes: The upper nailing sleeve (41) is provided with the connecting protrusion (31), and the upper nailing sleeve (41) is also provided with an upper nailing handle (411); and The upper nail connecting rod (43) passes through the upper nail sleeve (41), and the upper nail connecting rod (43) is provided with the connector (32).

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