Periosteum distraction device for skull

Abstract

The utility model belongs to the field of medical instruments suitable for orthopedic surgery, and particularly relates to a periosteum distraction device for a skull, which comprises a strip-shaped distraction plate bent in an arc shape, a sleeve and a distraction nail provided with external threads, one end of the distraction plate is provided with a combination hole penetrating through the upper surface and the lower surface, and the combination hole is composed of a groove and a threaded hole; a boss matched with the groove in an inserted mode is arranged on the end face of one end of the sleeve, and the sleeve is inserted into the groove in the convex face direction of the stretching plate. The distraction nail penetrates through the sleeve and then is in threaded connection with the distraction plate, the nail tail of the distraction nail extends to the outside of the sleeve, and the nail head of the distraction nail extends to the concave face side of the distraction plate and is configured to make contact with the bone surface. According to the distraction device, the distraction plate can be driven to rotate integrally by rotating the sleeve through the inserting and matching structure of the groove and the sleeve, flexible adjustment of the position of the distraction plate is achieved, periosteum can be stimulated in a targeted mode, and therefore regeneration of subperiosteal blood vessels can be promoted.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology, specifically relating to a periosteal traction device for the skull. Background Technology

[0002] Periosteal distraction therapy stimulates the periosteum by stretching it, thereby promoting subperiosteal angiogenesis. This technique has significant application value in areas such as ischemic cranial injuries. However, existing periosteal distraction devices cannot be specifically adjusted to meet local periosteal distraction needs. Furthermore, once the distraction plate is positioned, it is difficult to adjust postoperatively, resulting in a single distraction direction and a lack of multi-directional adjustment capability, thus affecting the clinical efficacy of angiogenesis.

[0003] Therefore, there is an urgent need to develop a new type of periosteal traction device that can adjust the position of the traction plate according to the need for periosteal stimulation. Summary of the Invention

[0004] The purpose of this invention is to provide a periosteal traction device for the skull that allows for adjustment of the position of the traction plate to specifically stimulate the periosteum.

[0005] The technical solution provided by this utility model is:

[0006] A periosteal traction device for the skull, comprising:

[0007] A strip-shaped tension plate with an arc-shaped bend has an arc-shaped edge at one end and a connecting hole penetrating the upper and lower surfaces of the tension plate at the other end. The connecting hole consists of a groove and a threaded hole.

[0008] A sleeve has a boss on one end face that engages with the groove, and the sleeve is inserted into the groove along the convex surface of the tension plate.

[0009] The tensioning pin has an external thread on its shank that matches the threaded hole. The tensioning pin passes through the sleeve and the threaded hole sequentially. The tail of the tensioning pin extends beyond the sleeve, and its head extends to the concave side of the tensioning plate and is positioned to contact the bone surface. The working principle of this periosteal tensioning device is based on the fact that the periosteal elevation is not high, the cortical bone surface contacted by the tensioning pin head is rough and uneven, and the grease present on the inner surface of the periosteal has an adhesive effect, ensuring a tight fit between the periosteal and the tensioning plate. For these reasons, the periosteal tensioning device of this invention will not tip over under the periosteal and can effectively stretch the periosteal. By adding a groove design to the tensioning plate and its cooperation with the sleeve, rotating the sleeve can cause the tensioning plate and tensioning pin to rotate together, thereby changing the position of the tensioning plate.

[0010] Preferably, there are two grooves, which are arranged symmetrically around the axis of the threaded hole.

[0011] Preferably, the two grooves are provided on the inner wall of the threaded hole and are distributed at 180° along the axis of the threaded hole.

[0012] Preferably, the two grooves are located next to the threaded hole and are distributed at 180° along the axis of the threaded hole, and the grooves and the threaded hole are independently provided.

[0013] Preferably, the other end of the sleeve is provided as a prismatic drive connector.

[0014] Preferably, the prism-shaped drive connector is a hexagonal head or a square head.

[0015] Preferably, the tail of the nail is provided with a drive interface that cooperates with the drive device.

[0016] Preferably, the drive interface is a hexagonal head, a square head, a hexagonal groove, or a square groove.

[0017] Preferably, the nail head is a ball head.

[0018] The beneficial effects of this utility model are as follows:

[0019] Multi-directional adjustment capability: Through the insertion and matching structure of the groove and the sleeve, rotating the sleeve can drive the entire tension plate to rotate, realizing flexible adjustment of the tension plate position, which can specifically stimulate the periosteum, thereby promoting the regeneration of subperiosteal blood vessels;

[0020] Ease of operation: The standardized drive interface design of the prismatic drive connector at the end of the sleeve and the tail of the tension nail is compatible with conventional surgical instruments. Intraoperative adjustments do not require complicated tools, making operation convenient and quick.

[0021] The screw head adopts a ball bearing design, which ensures that the tension screw always makes point contact with the bone cortex. When the tension plate rotates as a whole, the patient does not feel the pain caused by the rotation. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the periosteal traction device according to Embodiment 1 of this utility model;

[0023] Figure 2 This is a schematic diagram of the tension plate in Example 1;

[0024] Figure 3 This is a schematic diagram of the sleeve structure in Example 1;

[0025] Figure 4 This is a schematic diagram of the tension nail structure in Example 1;

[0026] Figure 5 This is a schematic diagram of the tension plate in Example 2;

[0027] Figure 6 This is a schematic diagram of the sleeve structure in Example 2;

[0028] In the figure, 1 is the tension plate, 11 is the arc edge, 12 is the groove, 13 is the threaded hole, 14 is the mating hole, 2 is the sleeve, 21 is the boss, 22 is the drive connector, 3 is the tension nail, 31 is the nail tail, 32 is the nail head, and 33 is the drive interface. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description of the periosteal traction device for the skull, through embodiments and in conjunction with the accompanying drawings, is provided. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this utility model.

[0030] Example 1

[0031] like Figure 1 As shown, the periosteal traction device of this embodiment is made of titanium alloy or medical stainless steel and mainly includes a traction plate 1, a sleeve 2 and a traction nail 3. The traction plate 1 and the traction nail 3 are threaded together. The sleeve 2 is fitted over the traction nail 2 and inserted into the traction plate 1. The nail head 32 of the traction nail 3 passes through the traction plate 1 and is configured to contact the surface of the bone cortex. The nail tail 31 of the traction nail 3 extends to the outside of the sleeve 2.

[0032] like Figure 2 As shown, the traction plate 1 is an arc-shaped strip, the curvature of which matches the anatomical shape of the skull surface. One end of the traction plate has a smooth arc-shaped edge 11 to reduce damage to surrounding tissues and facilitate the peeling of the periosteum and insertion of the traction plate 1 under the periosteum; the other end of the traction plate has a connecting hole 14 penetrating the upper and lower surfaces of the traction plate 1, the connecting hole 14 consisting of a groove 12 and a threaded hole 13. In this embodiment, there are two grooves 12 penetrating the upper and lower surfaces of the traction plate 1, and the two grooves 12 are located on the inner wall of the threaded hole 13 and are symmetrically arranged around the axis of the threaded hole 13 at 180°. Of course, the number of grooves 12 can be one, three or four, and the arrangement of the grooves 12 is not limited to a symmetrical arrangement, as long as it can achieve the insertion and engagement with the sleeve 2.

[0033] like Figure 3 As shown, the sleeve 2 is a hollow cylinder, and one end face of the sleeve 2 is provided with a boss 21 that is inserted into the groove 12. The sleeve 2 is inserted into the groove 12 along the convex surface of the tension plate 1 to achieve connection with the tension plate 1. The other end of the sleeve 2 is provided with a prism-shaped drive connector 22. The drive connector 22 is preferably a hexagonal head or a square head to facilitate rotation operation using a wrench.

[0034] like Figure 4As shown, the shank of the tension nail 3 has an external thread that matches the threaded hole 13. The tension nail 3 passes through the sleeve 2 and the threaded hole 13 in sequence. The tail 31 of the tension nail 3 has a drive interface 33 that cooperates with the drive device. The drive interface 33 is preferably a hexagonal head, a square head, a hexagonal groove, or a square groove to facilitate installation and disassembly. The head 32 of the tension nail 3 extends to the concave side of the tension plate 1 and is configured to contact the surface of the bone cortex to serve as a force support point for traction of the periosteum. In this embodiment, the head 32 is a ball head. The ball design minimizes the contact area between the tension nail 3 and the bone cortex, so that when the tension plate 1 is rotated to drive the entire periosteum traction device to rotate, the patient does not feel pain caused by the rotation.

[0035] Example 2

[0036] like Figures 5-6 As shown, this embodiment is another implementation of the present invention: the difference between Embodiment 2 and Embodiment 1 is that two grooves 12 are provided next to the threaded hole 13, and the grooves 12 and the threaded hole 13 are independent of each other. The two bosses 21 of the sleeve 2 are provided on one end face and are inserted into the grooves 12. Other structures are the same as in Embodiment 1. It should be noted that the two grooves 12 may penetrate the upper and lower surfaces of the tension plate 1, or they may not penetrate the upper and lower surfaces of the tension plate 1. When the grooves 12 do not penetrate the upper and lower surfaces of the tension plate 1, the opening direction of the grooves 12 is consistent with the convex direction of the tension plate 1.

[0037] When using this periosteum traction device, first connect the traction plate 1 and the traction nail 3. Pass the curved edge 11 of the traction plate 1 through the surgical incision and insert the traction plate 1 between the periosteum and the skull. Then, insert the protrusion 21 of the sleeve 2 into the groove 12, adjust the position of the traction plate 1 as needed, and then suture the surgical incision. Next, use a driving instrument to rotate the traction nail 3 through the driving interface 33 to lift the traction plate 1 and expand the periosteum. Finally, rotate the sleeve 2 as needed to adjust the expanded position of the traction plate 1.

[0038] If the position of the tension plate 1 needs to be adjusted, simply use a wrench to rotate the drive connector 22 of the sleeve 2. Since the sleeve 2 and the tension plate 1 are connected through the engagement of the groove 12 and the boss 21, rotating the sleeve 2 can drive the tension plate 1 and the tension nail 3 to rotate together, thereby changing the position of the tension plate 1. This design makes the position adjustment of the tension plate 1 convenient and quick, and can be adjusted according to the needs of the periosteum stimulation site, improving the clinical efficacy of angiogenesis.

[0039] In summary, the periosteal traction device of this invention achieves flexible adjustment of the traction plate position through the insertion and matching structure of the groove and the sleeve. It has the advantages of simple operation, quick adjustment, and strong targeting, and has important application value in the field of cranial ischemia.

[0040] In summary, the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A periosteal traction device for the skull, characterized in that, include: A strip-shaped tension plate (1) with an arc-shaped bend has an arc-shaped edge (11) at one end and a connecting hole (14) penetrating the upper and lower surfaces of the tension plate (1) at the other end. The connecting hole (14) is composed of a groove (12) and a threaded hole (13). The sleeve (2) has a boss (21) on one end face that is inserted into the groove (12). The sleeve (2) is inserted into the groove (12) along the convex direction of the tension plate (1). The tension nail (3) has an external thread on its shank that is adapted to the threaded hole (13). The tension nail (3) passes through the sleeve (2) and the threaded hole (13) in sequence. The tail (31) of the tension nail (3) extends to the outside of the sleeve (2), and its head (32) extends to the concave side of the tension plate (1) and is configured to contact the bone surface.

2. The periosteal traction device according to claim 1, characterized in that, The number of grooves (12) is two, and they are arranged symmetrically around the axis of the threaded hole (13).

3. The periosteal traction device according to claim 2, characterized in that, The two grooves (12) are provided on the inner wall of the threaded hole (13) and are distributed at 180° along the axis of the threaded hole (13).

4. The periosteal traction device according to claim 2, characterized in that, The two grooves (12) are located next to the threaded hole (13) and are distributed at 180° along the axis of the threaded hole (13). The grooves (12) and the threaded hole (13) are set independently.

5. The periosteal traction device according to any one of claims 1-4, characterized in that, The other end of the sleeve (2) is provided as a prismatic drive connector (22).

6. The periosteal traction device according to claim 5, characterized in that, The prism-shaped drive connector (22) is a hexagonal head or a square head.

7. The periosteal traction device according to claim 5, characterized in that, The tail (31) is provided with a drive interface (33) that cooperates with the drive device.

8. The periosteal traction device according to claim 7, characterized in that, The drive interface (33) is a hexagonal head, a square head, a hexagonal groove, or a square groove.

9. The periosteal traction device according to claim 5, characterized in that, The nail head (32) is configured as a ball head.

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