Periosteal distraction apparatus

Abstract

NOT VISIBLE DUE TO STATUS OF PATENT

Description

Periosteal distraction device Technical Field

[0001] The present application belongs to the field of medical device technology, and in particular relates to a periosteal stretching device. Background Art

[0002] With the improvement of people's living standards, the incidence of diabetes and peripheral vascular diseases has been increasing year by year. Cases of limb ischemia, pain and necrosis caused by diseases such as diabetic foot, arteriosclerosis obliterans, and thromboangiitis obliterans are becoming more and more common. Many patients have undergone amputation or are at risk of amputation. Even after amputation, many patients still have non-healing wounds, resulting in an extremely high disability rate. For distal limb ischemia caused by vascular diseases, treatments such as improving microcirculation, thrombolysis, thrombectomy, and vascular stents have been used in the past. However, most treatments can only temporarily relieve symptoms, and there is no significant improvement in the condition of limb ischemia caused by peripheral vascular disease. Only reconstruction of limb tissue microcirculation can truly solve this problem. Lateral bone transfer technology can achieve microvascular regeneration, but the surgical trauma is large and some patients find it difficult to tolerate.

[0003] In recent years, periosteal distraction has emerged as a novel treatment for these conditions, demonstrating promising results and becoming a research hotspot. Numerous periosteal distraction devices have emerged. While these devices demonstrate some efficacy, their clinical application has also led to the emergence of disadvantages such as pain in some patients, device exposure, infection, and increased difficulty in postoperative care.

[0004] For example, Chinese utility model patent CN213430479U discloses a "periosteal stretcher." Its disadvantages are: the periosteum is stretched by filling the internal liquid sac with liquid through an external liquid filling interface, causing the sac to expand and expand. The pressure is difficult to control, making care inconvenient and the risk of infection high. Chinese invention patent CN112807094A discloses a "novel magnesium-containing periosteal transport device and its application." Its disadvantages are: the device is exposed, resulting in a high infection rate; the periosteum is stretched by the pressure generated by the release of gas, making the degree and range of stretching difficult to control. Chinese invention patent CN113081207A discloses a "precise telescopic and adjustable periosteal stretching system." This system is still an exposed system with an exposed device and a high infection rate. Chinese utility model patent CN216754573U discloses a "periosteal stretching frame device." This device is internal, and after surgery, the skin is completely sutured and the device is not exposed. However, its internal elastic device is prone to jamming, which is not conducive to repeated stretching.

[0005] Summary of the Invention

[0006] The technical problem to be solved by the present application is to overcome the deficiencies of the existing technology and provide a periosteal distraction device that is easy and simple to operate, has minimal trauma, and has a low risk of infection.

[0007] To achieve the above objectives, the specific technical solutions of this application are as follows:

[0008] A periosteal distraction device, comprising a distraction plate and an elastic sleeve, wherein the distraction plate is fixedly connected to a telescopic end of the elastic sleeve;

[0009] The elastic sleeve includes a housing and a slider disposed inside the housing. The upper portion of the slider is provided with a connecting rod extending relative to the housing, and the end of the connecting rod is connected to the tensioning plate.

[0010] A return spring and a locking rod are also provided in the shell, the return spring abuts against the bottom of the slider, the locking rod is fixed to the inner wall of the shell, a locking hook is provided at the end of the locking rod, and a plurality of guide grooves are provided on the slider, the locking hook is slidably inserted in the guide groove, and the guide groove includes a first guide groove and a second guide groove, and the first guide groove and the second guide groove are connected.

[0011] Therefore, the present application realizes elastic stretching of the periosteum through the connection between the stretching plate and the elastic sleeve and the combination of the return spring and the locking rod inside the shell. When an external force is applied to press the stretching plate or the telescopic end, the locking hook at the end of the locking rod slides in a circular motion in the guide groove, thereby producing an elastic stretching effect. The connecting rod at the top of the slider passes through the shell and is fixedly connected to the stretching plate by a connecting screw. This design can adapt to the stretching requirements and stretching angles in different situations. The device can be stretched and stopped by pressing and releasing the external force, and the operation is relatively simple.

[0012] Furthermore, the guide grooves have different depths, the movable path of the locking hook in the first guide groove is a locking path, the movable path of the locking hook in the second guide groove is an ejection path, and the depth of the locking path is greater than the depth of the ejection path.

[0013] Furthermore, the locking hook matches the inner dimensions of the guide groove.

[0014] Furthermore, the inlet and outlet openings of the guide groove are connected end to end.

[0015] Furthermore, a concave slot for limiting the movement of the locking hook is provided at the connection between the first guide slot and the second guide slot, and a boss is provided at a position of the guide slot facing the concave slot, and a movement channel for the locking hook is formed between the concave slot and the boss.

[0016] Furthermore, the depth of the inlet groove of the first guide groove is deeper than the depth of the outlet groove of the second guide groove.

[0017] Furthermore, the distraction plate is provided with bone pin holes. One or more bone pin holes can be provided as needed, and the distraction device is fixed to the bone cortex through the bone pins, providing better fixation.

[0018] In addition, the tensioning plate is in the shape of a long plate with rounded corners or a long plate with rounded corners.

[0019] The present invention has the following advantages: the present invention can achieve the stretching and stopping of the device by pressing and releasing the external force, and the operation is relatively simple. The periosteal stretching device of the present invention can achieve elastic stretching and fixation of the periosteum while having a simple structure and convenient operation, and has certain application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] FIG1 is a schematic structural diagram of the periosteal distraction device of the present application;

[0021] FIG2 is a schematic diagram of the locked state of the slider of the present application;

[0022] FIG3 is a schematic diagram of the slider in the pop-up state of the present application;

[0023] FIG4 is a schematic diagram of the installation of the locking rod of the present application;

[0024] FIG5 is a schematic diagram of the slider structure of the present application;

[0025] FIG6 is a front view of FIG5;

[0026] FIG7 is a schematic diagram of the periosteal stretching device of the present application in use.

[0027] Explanation of the marks in the figure: 1. Tension plate; 2. Elastic sleeve; 21. Telescopic end; 22. Shell; 3. Connecting screw; 4. Locking rod; 41. Locking hook; 5. Return spring; 7. Slider; 71. Connecting rod; 8. Guide groove; 81. First guide groove; 811. Entrance groove; 82. Second guide groove; 821. Exit groove; 83. Concave slot; 84. Boss; 9. Tibia; 10. Bone pin hole. DETAILED DESCRIPTION

[0028] In order to better understand the purpose, structure and function of this application, the application is further described in detail below in conjunction with the accompanying drawings.

[0029] As shown in Figure 1, a periosteal distraction device of this embodiment includes a distraction plate 1 and an elastic sleeve 2, and the distraction plate 1 is fixedly connected to the telescopic end 21 of the elastic sleeve 2. The elastic sleeve 2 is cylindrical. Bone pin holes 10 can be provided on the distraction plate 1, and the distraction device is fixed to the bone cortex through the bone pins, providing better fixation. Specifically, one or more bone pin holes 10 can be provided as needed. The distraction plate 1 is in the shape of a long plate with rounded corners or a long plate with rounded corners. The distraction plate 1 is a straight plate or a long plate with an arc.

[0030] As shown in Figures 2 and 3, the elastic sleeve 2 includes a housing 22 and a slider 7 disposed within the housing 22. A connecting rod 71 is disposed on the upper portion of the slider 7, extending from the housing 22. The end of the connecting rod 71 is connected to the tensioning plate 1. Specifically, the slider 7 is in contact with the inner wall of the housing 22 and can slide relative to it. The connecting rod 71 extends through the housing 22 and is fixedly connected to the tensioning plate 1 via connecting screws 3.

[0031] As shown in Figures 2 to 5, a reset spring 5 and a locking rod 4 are also provided in the housing 22. The reset spring 5 abuts against the bottom of the slider 7. The locking rod 4 is fixed to the inner wall of the housing 22. A locking hook 41 is provided at the end of the locking rod 4. A plurality of guide grooves 8 are provided on the slider 7. The locking hook 41 is slidably inserted into the guide groove 8. The locking hook 41 matches the internal dimensions of the guide groove 8.

[0032] Specifically, as shown in Figures 5 and 6, the entry and exit slots of the guide groove 8 are connected end to end. The guide grooves 8 have different depths. The movable path of the locking hook 41 in the first guide groove 81 is a locking path, and the movable path of the locking hook 41 in the second guide groove 82 is an ejection path. The depth of the locking path is greater than the depth of the ejection path. Preferably, the guide groove 8 includes a first guide groove 81 and a second guide groove 82. The first guide groove 81 and the second guide groove 82 are connected. The depth of the entrance groove 811 of the first guide groove 81 is deeper than the depth of the exit groove 821 of the second guide groove 82. A concave groove 83 for limiting the movement of the locking hook 41 is provided at the connection between the first guide groove 81 and the second guide groove 82. A boss 84 is provided on the guide groove 8 at a position facing the concave groove 83. The space between the concave groove 83 and the boss 84 is a movable channel for the locking hook 41. When external force is applied to the distraction plate 1 or the telescopic end 21, the locking hook 41 at the end of the locking rod 4 disengages the concave groove 83 and, with the cooperation of the return spring, slides out along the second guide groove 82, at which point the periosteal distraction device of this embodiment begins to stretch. Pressing the distraction plate 1 or the telescopic end 21 again causes the locking hook 41 at the end of the locking rod 4 to slide into the first guide groove 81 and ultimately be restrained within the concave groove 83, locking the position of the slider 7. At this point, the periosteal distraction device of this embodiment stops stretching.

[0033] In use, as shown in Figure 7, a hole is drilled in the tibia 9, and then the elastic sleeve 2 is inserted into the hole. The distraction plate 1 is then inserted between the bone and the periosteum. The distraction plate 1 is secured to the connecting rod 71 and locked using the connecting screws 3. When a pressing force is applied to the distraction plate 1 or the connecting screws 3, the locking hook 41 at the end of the locking rod 4 slides cyclically within the guide groove 8, thereby achieving elastic distraction between the distraction plate 1 and the elastic sleeve 2. When pressed again, the distraction plate 1 and the elastic sleeve 2 lock, and the distraction stops.

[0034] This embodiment also provides a method for using the periosteal distraction device, comprising the following steps:

[0035] Step 1: Make a 2-cm longitudinal skin incision on the anteromedial mid-calf of the patient's affected limb. Cut down to the superficial fascia, retract the soft tissue, and transversely incise the periosteum of the tibia 9. Use a nerve dissection spoon to dissect the periosteum proximally and distally. Drill a hole in the tibia 9, then insert the elastic sleeve 2. Next, place the distraction plate 1 between the bone and periosteum. Secure and lock the distraction plate 1 to the connecting rod 71 using the connecting screws 3.

[0036] Step 2: Suture the periosteum and skin to close the wound. After the wound is stable, press the distraction plate 1 or the connecting screw 3, unlock the elastic sleeve 2, and the distraction plate 1 applies outward tension to the periosteum to start periosteal distraction. Press the distraction plate 1 or the connecting screw 3 again, the distraction plate 1 and the elastic sleeve 2 are locked, and the periosteum distraction stops.

[0037] Step 3: After a period of distraction, remove the elastic periosteal distraction device from between the bone and the periosteum.

[0038] The present application provides a periosteal stretching frame device, which is small in size and completely closes the wound after installation. The device is not exposed, is easy to operate, not prone to jamming, and is convenient to care for, greatly reducing the potential infection risk caused by the exposure of the device. It is also simple to operate. A single press starts the periosteal stretching, and a second press stops the stretching. It can not only achieve the purpose of stretching the periosteum to promote microcirculation regeneration, but also relieve pain caused by excessive stretching and reduce the risk of local tissue necrosis.

[0039] It is understood that the present application is described by way of some embodiments, and it is understood by those skilled in the art that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present application. In addition, under the guidance of the present application, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the present application are within the scope of protection of the present application.

Claims

1. A periosteal distraction device, characterized in that: It includes a distraction plate (1) and an elastic sleeve (2), and the distraction plate (1) is fixedly connected to the telescopic end (21) of the elastic sleeve (2); The elastic sleeve (2) includes a housing (22) and a slider (7) disposed inside the housing (22). A connecting rod (71) extending relative to the housing (22) is provided on the upper part of the slider (7), and the end of the connecting rod (71) is connected to the distraction plate (1); A return spring (5) and a locking pull rod (4) are further provided in the housing (22). The return spring (5) abuts against the bottom of the slider (7). The locking pull rod (4) is fixed on the inner wall of the housing (22). A locking hook (41) is provided at the end of the locking pull rod (4). A plurality of guiding grooves (8) are provided on the slider (7). The locking hook (41) is slidably inserted into the guiding grooves (8). The guiding grooves (8) include a first guiding groove (81) and a second guiding groove (82), and the first guiding groove (81) and the second guiding groove (82) are communicated with each other.

2. The periosteum distraction device according to claim 1, wherein The depths of the guiding grooves (8) are different. The movement path of the locking hook (41) in the first guiding groove (81) is a locking path, and the movement path of the locking hook (41) in the second guiding groove (82) is an ejection path. The depth of the locking path is greater than the depth of the ejection path.

3. The periosteum distraction device according to claim 1, wherein The locking hook (41) matches the internal dimensions of the guiding grooves (8).

4. The periosteal distraction device according to claim 1, characterized in that, The inlet and outlet slots of the guiding grooves (8) are connected end to end.

5. The periosteal distraction device according to claim 1, wherein A concave card slot (83) for restricting the movement of the locking hook (41) is provided at the connection between the first guiding groove (81) and the second guiding groove (82). A convex platform (84) is provided at the position of the guiding groove (8) facing the concave card slot (83). The movement channel of the locking hook (41) is between the concave card slot (83) and the convex platform (84).

6. The periosteum distraction device according to claim 1, wherein, The depth of the inlet slot (811) of the first guiding groove (81) is deeper than the depth of the outlet slot (821) of the second guiding groove (82).

7. The periosteal distraction device according to claim 1, characterized in that, Bone pin holes (10) are provided on the distraction plate (1).

8. The periosteal distraction device according to claim 1, wherein, The distraction plate (1) is a long plate shape with rounded corners or a long plate shape with blunt ends.