Periosteum stretching device for skull

Abstract

The present invention belongs to the technical field of medical devices, and specifically is a periosteal distraction device for the skull, comprising: a distraction pin, a columnar connecting ring and a distraction rod, the rod of the distraction pin is provided with an external thread, and the tail thereof is provided with a groove of any desired shape for matching with the driving characteristic shape of a driving device; the distraction rod has a certain elasticity, the head thereof is a blunted end, and the tail thereof is provided with a clamping joint whose size is larger than the rod thereof; the inner surface of the connecting ring is provided with an internal threaded hole matching with the external thread, the circumference of the connecting ring is provided with a plurality of through holes, the clamping joint is clamped in the through holes, the rod of the distraction rod extends out of the connecting ring, and the connecting ring is threadedly connected with the distraction pin. The periosteal distraction device for the skull of the present invention has the advantages of small wound, large distraction area, high safety, etc., and is suitable for periosteal distraction operations in skull surgery.

Description

Technical Field

[0001] The invention belongs to the technical field of medical devices, and in particular is a periosteum stretching device for a skull. Background Art

[0002] In the process of treating stroke, researchers have found that the use of periosteal transfer technology (also known as periosteal stretching technology) can treat neurodegenerative diseases such as stroke, Alzheimer's disease, and Parkinson's disease. This technology can activate the periosteum to release a variety of cytokines such as vascular endothelial growth factor (VEGF) by slowly moving the periosteum. These factors not only promote the growth of blood vessels around the periosteum, but also may act on the brain tissue through systemic circulation, stimulate the formation of microvessels in the brain, and improve peripheral blood supply. For stroke patients, brain tissue is damaged due to ischemia, and angiogenesis can improve oxygen supply. For example, announcement number CN219048858U discloses a periosteum mover for the skull, including a moving piece installed between the skull and the periosteum, a curved elastic gasket fixedly connected to the lower part of the moving piece, a threaded channel opened in the middle of the moving piece, a screw threaded in the threaded channel, and the bottom of the screw against the middle of the elastic gasket. The periosteum mover adjusts the height of the periosteum supported by the moving plate by changing the relative height of the screw and the moving plate through the threaded cooperation between the screw and the moving plate. However, the periosteum mover has the following problems:

[0003] In cases where a large area of ​​periosteum needs to be stretched, the stretch area of ​​periosteum cannot be taken into account at the same time as the surgical incision or safety. In order to increase the stretch area of ​​periosteum, one method is to increase the width of the transfer plate. In order to place the transfer device between the periosteum and the skull, it is necessary to increase the incision of skull surgery. The increase in incision will damage more blood vessels in the stretch area, which is undoubtedly worse for the patient and is not conducive to postoperative recovery. Another method is to raise the height of the transfer plate. The stretch area of ​​periosteum can be increased by rotating the screws every once in a while to raise the height of the transfer plate. The greater the height of the periosteum transfer, the greater the risk of periosteum rupture, affecting postoperative safety. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a periosteal stretching device for the skull, which has a large periosteal stretching area, a small skull surgery incision and high postoperative safety.

[0005] The technical solution provided by the present invention is as follows: a periosteum distraction device for a skull, comprising: a distraction nail, the rod of which is provided with an external thread, and the tail of which is provided with a groove of any desired shape for matching with the driving characteristic shape of a driving instrument; a distraction rod, the head of which is a blunt end, and the tail of which is provided with a clamping joint with a size larger than the rod;

[0006] A connecting ring, the inner ring surface of which is provided with an inner thread that matches the outer thread, a plurality of through holes are provided in the circumference of the connecting ring, the clamping joint is clamped in the through hole, the rod portion of the distraction rod extends out of the connecting ring, and the connecting ring is threadedly connected to the distraction pin. When the periosteal distraction device of the present invention is used, it is only necessary to cut a small incision in the distraction area of ​​the skull to insert the connecting ring between the periosteum and the skull, and then insert the distraction rod through the connecting ring between the periosteum and the skull. The entire periosteal distraction device only needs to cut an incision in which the connecting ring can be inserted, so that the incision area of ​​the skull surgery is small and more blood vessels in the distraction area are not damaged. However, the periosteal mover of the prior art requires the moving plate and its fixed elastic gasket to be placed under the periosteum at the same time, and the moving plate needs to peel off the periosteum on both sides of the incision, which is bound to increase the incision and damage more blood vessels.

[0007] By arranging a distraction rod in the circumferential direction of the connecting ring, the periosteal distraction device forms an umbrella-shaped structure, so that the periosteum is stretched in a circular range. When the height of the periosteum stretching and the diameter of the umbrella-shaped structure of the periosteal distraction device of the present invention are the same as the length of the moving piece of the periosteal mover of the prior art, because the width of the periosteal moving piece is smaller than the diameter of the umbrella-shaped structure of the present invention, the distraction area of ​​the periosteal distraction device of the present invention is larger, and it is suitable for patients with a large periosteal distraction area; on the contrary, when the two have the same periosteal distraction area, the height of the connecting ring lifted by the periosteal distraction device of the present invention is smaller than the lifting height of the moving piece in the periosteal mover of the prior art, so that the periosteal distraction device of the present invention can reduce the height of the periosteum stretching, thereby reducing the risk of periosteum rupture and improving safety.

[0008] Preferably, the connecting ring is a cylindrical ring or a chamfered polygonal prism ring.

[0009] Preferably, the inner side of one end of the connecting ring is set as an internal threaded hole, and the inner side of the other end of the connecting ring is set as a circular hole, the diameter of the circular hole is larger than the diameter of the internal threaded hole and they have a common center line, the through hole is set on the side wall of the circular hole, and the center line of the through hole is inclined toward the direction of the internal threaded hole.

[0010] Preferably, the inner ring of the connecting ring is configured as an internal threaded hole matching the external thread, the through hole is provided at one end of the connecting ring, and the center line of the through hole is inclined toward the other end of the connecting ring.

[0011] Preferably, the through hole is a conical hole, and the diameter of the conical hole gradually decreases from the inner ring of the connecting ring to the outer ring thereof.

[0012] Preferably, the clamping joint is configured as a cone head matching the conical hole.

[0013] Preferably, the through hole consists of a first circular hole and a second circular hole with a common center line, the diameter of the first circular hole is larger than the diameter of the second circular hole, the second circular hole is located on the outer ring side of the connecting ring, and the first circular hole is located on the inner ring side of the connecting ring.

[0014] Preferably, the clamping joint is configured as a ball head or a cylindrical head matching the first circular hole.

[0015] Preferably, the head of the distraction nail is designed as a ball head. When the distraction nail is rotated, the ball head design allows the distraction nail to always be in point contact with the bone surface, so that the patient does not feel the pain and stimulation caused by the rotation of the distraction nail.

[0016] More preferably, surfaces of the distraction rod, the connecting ring and the distraction nail are coated with an antibacterial coating.

[0017] Compared with the prior art, the periosteal stretching device for the skull of the present invention has the following beneficial effects:

[0018] The periosteal stretching device for the skull of the present invention has the advantages of small wound, large stretching area, high safety, etc., and is suitable for periosteal stretching operations in skull surgery. Moreover, because the periosteal stretching device of the present invention has a large stretching area, it can also reduce the frequency of rotating the stretching pins at regular intervals, and can reduce the number of times each stretching causes discomfort to the patient. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic structural diagram of a periosteal stretching device according to Example 1 of the present invention;

[0020] Figure 2 This is a schematic structural diagram of the tension rod of Example 1;

[0021] Figure 3 This is a schematic diagram of the structure of the connecting ring of Example 1;

[0022] Figure 4 It is a cross-sectional view of a connecting ring of Example 2 of the present invention;

[0023] Figure 5 This is a schematic structural diagram of the tension rod of Example 2;

[0024] Figure 6 This is a diagram of the periosteal stretching device in use according to Embodiment 1 of the present invention;

[0025] Figure 1 Middle: 1 distraction nail, 11 groove, 2 distraction rod, 3 connecting ring;

[0026] Figure 2 Middle: 2 tension rods, 21 clamp joints;

[0027] Figure 3Middle: 3 connecting ring, 31 internal threaded hole, 321 tapered hole, 33 round hole;

[0028] Figure 4 Middle: 3' connecting ring, 31' internal threaded hole, 32' through hole, 321' first circular hole, 322' second circular hole, 33' circular hole;

[0029] Figure 5 Middle: 2' tension rod, 21' card joint;

[0030] Figure 6 Middle: 1 distraction pin, 2 distraction rod, 3 connecting ring, 4 periosteum, 5 skull;

[0031] Since the structures of the tension rod and the connecting ring in Embodiment 1 and Embodiment 2 are different, their reference numerals are different. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical scheme and advantages of the present invention more clearly understood, the periosteal distraction device for the skull of the present invention is further described in detail below through embodiments and in combination with the accompanying drawings. It should be understood that the specific embodiments described herein are only for explaining the embodiments and are not intended to limit the present invention. It should be noted that the embodiments in this application and the features described in the embodiments can be combined with each other in the absence of conflict. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0033] Example 1

[0034] like Figures 1 to 3 As shown, the present invention provides a periosteal distraction device for the skull, which is assembled from a distraction nail 1, 8 distraction rods 2 and a connecting ring 3, wherein the distraction nail 1, the distraction rod 2 and the connecting ring 3 are made of pure titanium, titanium alloy or stainless steel, preferably titanium alloy.

[0035] The rod of the distraction nail 1 is provided with an external thread, and the tail of the distraction nail 1 is provided with a groove 11 . The shape of the groove 11 can match the driving characteristic shape of the driving device to facilitate the rotation of the distraction nail 1 .

[0036] like Figure 2 As shown, the head of the distraction rod 2 is a blunt end to avoid piercing the periosteum. The tail of the distraction rod 2 is provided with a clamping joint 21, which is a cone head with a diameter gradually decreasing from its end surface to the rod portion. The size of the clamping joint 21 is larger than the rod portion of the distraction rod 2. The length of the distraction rod 2 can be adjusted according to the size of the surgical distraction area. When the distraction area of ​​the skull periosteum is large, a longer distraction rod 2 is used; otherwise, a shorter distraction rod 2 is used. In addition, it is also possible to determine which through holes 32 to insert the distraction rod 2 according to the shape of the distraction area.

[0037] like Figure 3As shown, the connecting ring 3 is in the shape of a cylindrical ring, and the inner side of one end of the connecting ring 3 is set as an internal thread hole 31 that matches the external thread of the distraction nail 1, and the inner side of the other end of the connecting ring 3 is set as a circular hole 33. The diameter of the circular hole 33 is larger than the diameter of the internal thread hole 31 and they are co-centering. The circumferential side wall of the circular hole 33 is provided with 8 through holes 32 inclined in the direction of the internal thread hole 31. The inclined design of the through hole 32 can facilitate the insertion of the distraction rod 2 into the connecting ring 3. After the distraction rod 2 passes through the through hole 32, the clamping joint 21 is clamped in the through hole 32, and the rod of the distraction rod 2 extends out of the connecting ring 3. The extended distraction rod 2 is used to distract the periosteum. Specifically, the through hole 32 is a conical hole 321 whose size gradually decreases from the inner side of the connecting ring 3 to the outer side thereof. The taper design of the conical hole 321 matches the clamping joint 21. The design of the cone head and the cone hole makes the connection between the distraction rod 2 and the connecting ring 3 more stable.

[0038] The size of the circular hole 33 is larger than the internal threaded hole 31. Firstly, it is convenient for the tension rod 2 to be inserted into the connecting ring 3 and provides a placement space for the clamping joint 21 of the tension rod 2. Secondly, after the tension rod 2 is clamped into the connecting ring 3, the rod of the tension nail 1 screwed into the connecting ring 3 can prevent the tension rod 2 from withdrawing.

[0039] In some specific embodiments, the head of the distraction nail 1 is designed as a ball head. When the distraction nail 1 is rotated, the ball head design allows the distraction nail to always be in point contact with the bone surface, so that the patient does not feel the pain and stimulation caused by the rotation of the distraction nail.

[0040] In some specific embodiments, the surfaces of the distraction rod 2, the connecting ring 3 and the distraction pin 1 are coated with an antibacterial coating, which can effectively prevent infection of the periosteum and the subperiosteal tissue. The antibacterial coating can be any one of a TiO2 nanoporous antibacterial coating, an iodine-loaded antibacterial coating or a silver-loaded antibacterial coating.

[0041] It should be noted that the shape of the connecting ring 3 can be a polygonal prism with edges removed; the length of the rod portion of the tension rod 2 can be determined according to the size of the tension area.

[0042] like Figure 6As shown, during skull surgery, the periosteal distraction device of this embodiment first opens a minimally invasive incision in the area of ​​the patient's skull that needs distraction, then implants the connecting ring 3 between the periosteum 4 and the skull 5, then inserts multiple distraction rods 2 into the through holes 32 of the connecting ring 3 one by one, and inserts the rods of the distraction rods 2 between the periosteum 4 and the skull 5, and then screws the distraction pins 1 to the connecting ring 3. By rotating the distraction pins 1 screwed to the connecting ring 3, the connecting ring 3 is gradually raised under the pressure of the periosteum 4, and the distraction rods 2 are driven to rise, thereby lifting the periosteum 4 to stretch the periosteum 4, so as to promote the growth of blood vessels around the periosteum and improve vascular oxygen supply, and may even stimulate the regeneration of blood vessels in the brain and improve peripheral blood supply. According to the patient's need to stretch the periosteum to the required area, the distraction pins are rotated at regular intervals to continuously, stably, and slowly stretch the periosteum, thereby achieving a rhythmic and upward distraction effect of the periosteum. The periosteal stretching device for the skull of the present invention has the advantages of small incision, large stretching area, high safety, etc., and is suitable for periosteal stretching operations in skull surgeries.

[0043] Example 2

[0044] like Figure 4 and Figure 5 As shown, this embodiment is another implementation of the present invention: different from Embodiment 1, the structures of the tension rod and the connecting ring in this embodiment are different.

[0045] like Figure 4 As shown, the connecting ring 3' is in the shape of a cylindrical ring, and the inner side of the connecting ring is set as an internal threaded hole 31' that matches the external thread of the tensioning nail. One end of the connecting ring 3' is circumferentially provided with 8 through holes 32', and the center line of the through hole 32' is inclined toward the other end of the connecting ring 3'. The through hole 32' is composed of a first circular hole 321' and a second circular hole 322'. The first circular hole 321' is located on the inner side of the connecting ring 3', and its diameter is larger than the diameter of the second circular hole 322'. The second circular hole 322' is located on the outer side of the connecting ring 3', and the first circular hole 321' and the second circular hole 322' share the same center line. At the same time, the clamping joint 21' of the tensioning rod 2' is set to a cylindrical head shape that matches the first circular hole 321' (such as Figure 5 As shown in FIG. 1 ), the clamping joint 21 ′ of the distraction rod 2 ′ can also be set to a ball head shape that matches the first circular hole 321 ′. The second embodiment has the same surgical method and effect as the first embodiment.

[0046] In short, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A periosteal distraction device for a skull, characterized in that: include: A distraction nail, wherein the stem of the distraction nail is provided with an external thread, and the tail thereof is provided with a groove of any desired shape for matching with the driving feature shape of the driving instrument; A tension rod, wherein the head of the tension rod is a blunt end, and the tail of the tension rod is a clamping joint with a size larger than the rod; A connecting ring, wherein the inner surface of the connecting ring is provided with an internal thread matching with the external thread, and the connecting ring is provided with a plurality of through holes in the circumference thereof, the clamping joint is clamped in the through hole, the rod portion of the tensioning rod extends out of the connecting ring, and the connecting ring is connected with the external thread of the tensioning nail, the inner side of one end of the connecting ring in the axial direction is provided with an internal threaded hole matching with the external thread of the tensioning nail, and the inner side of the other end of the connecting ring in the axial direction is provided with a circular hole, the diameter of the circular hole is larger than the diameter of the internal threaded hole and they are co-centering, the through hole is provided on the side wall of the circular hole, and the center line of the through hole is inclined from the inside to the outside in the radial direction of the connecting ring toward the end provided with the internal threaded hole.

2. The periosteal distraction device according to claim 1, characterized in that: The connecting ring is a cylindrical ring or a polygonal prism ring with edges removed.

3. The periosteal distraction device according to claim 2, characterized in that: The through hole is a conical hole, and the diameter of the conical hole gradually decreases from the inner side of the connecting ring to the outer side thereof.

4. The periosteal distraction device according to claim 3, characterized in that: The clamping joint is configured as a cone head matching the conical hole.

5. The periosteal distraction device according to claim 2, characterized in that: The through hole is composed of a first circular hole and a second circular hole with a common center line, the diameter of the first circular hole is larger than the diameter of the second circular hole, the second circular hole is located on the outside of the connecting ring, and the first circular hole is located on the inside of the connecting ring.

6. The periosteal distraction device according to claim 5, characterized in that: The clamping joint is configured as a ball head or a cylindrical head matching the first circular hole.

7. The periosteal distraction device according to any one of claims 1 to 6, characterized in that: The head of the tension nail is designed as a ball head.

8. The periosteal distraction device according to claim 7, characterized in that: The surfaces of the distraction rod, the connecting ring and the distraction nail are coated with an antibacterial coating.

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