Spine correction device
By adopting a hinge structure and sensor monitoring with the spinal cord in the reconstructed osteotomy area as the central fulcrum during spinal correction surgery, the problems of implantation difficulty and injury risk in correcting severe spinal deformities in existing technologies are solved, and a safe and stable spinal correction effect is achieved.
Patent Information
- Application Number
- CN202311512667.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-11-14
- Publication Date
- 2025-10-10
AI Technical Summary
Existing technologies for correcting severe spinal deformity surgery have problems such as difficulty in implanting titanium mesh and artificial vertebrae, cumbersome operation, high risk of spinal cord injury, and uncontrollable correction degree. Especially for patients with severe spinal cord deformity, the correction process can easily lead to spinal cord nerve damage and unsatisfactory deformity correction.
A hinged structure-assisted correction device with the spinal cord in the reconstructed osteotomy area as the central fulcrum is used. The hinged structure of the fulcrum prevents excessive shortening of the posterior structure of the spine, supports the opening of the space in front of the vertebral osteotomy, and combines with sensors to monitor the correction force and angle to ensure spinal stability and safety.
It achieves standardized corrective operations, reduces the risks of spinal surgery, ensures the safety of spinal nerves, improves the stability and controllability of correction, and reduces the possibility of spinal cord injury.
Smart Images
Figure CN120753773A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application belongs to the technical field of medical devices, and particularly relates to a spinal column correction device. BACKGROUND
[0002] There are many causes of kyphotic deformity, including idiopathic, congenital, degenerative, trauma, tumor, infection, iatrogenic, malnutrition, and achondroplasia. Patients with a kyphotic Cobb angle > 30° often need to restore spinal cord and nerve function through surgical decompression, obtain strong fusion internal fixation, and relieve pain. Especially for patients with severe kyphoscoliosis, due to severe spinal deformity and severe thoracic deformity, high spinal deformity stiffness, poor lung function, great difficulty in orthopedic correction, high risk, and poor patient tolerance, the incidence of postoperative complications is high. Such patients often need three vertebral osteotomy correction, and pedicle subtraction osteotomy (PSO) and posterior total vertebral resection (PVCR) are commonly used for correction of severe or rigid spinal deformity.
[0003] The current surgical procedure is as shown in Figure 1 , which is roughly as follows: a plurality of screws are implanted on the spinal column Figure 1 , and the spinal column is a side view, so only one row of screws can be seen. In fact, screws are implanted on both sides of the spinal column, and a schematic diagram of the spinal column can be referred to Figure 2 , After that, the patient's spinal column is osteotomized, and the osteotomized area is a triangular area, and the osteotomized position is as shown in Figure 1 (a), and the state after osteotomy is as shown in Figure 1 (b). In this way, the spinal column is divided into two parts, and a triangular area exists between the two parts. Then, in order to prevent the spinal cord from being twisted, squeezed or wrinkled during spinal column correction (because the spinal column is closed by pressing the two parts, so the spinal cord will be squeezed and wrinkled, causing nerve damage), a titanium mesh, artificial vertebral body, Cage or other material is implanted on the left side of the triangular area to support the anterior column of the vertebral body. Then, the anterior column support material is used as a fulcrum to press and close the spinal column square structure, so as to correct the spinal deformity and prevent the spinal cord from being damaged due to excessive shortening. Finally, a fixing rod is used to fix the screws to achieve the purpose of spinal column correction. The prior art has the following disadvantages:
[0004] 1. For patients with severe spinal deformity, it is difficult to implant a titanium mesh, artificial vertebral body, or Cage with a suitable length in the osteotomized area due to the contraction of the anterior longitudinal ligament caused by deformity, making it difficult to expand the intervertebral space.
[0005] 2. During the correction process, the spine needs to be corrected repeatedly and alternately. During this process, the temporary rod needs to be bent, replaced, stretched, and pressurized repeatedly to achieve the correction purpose. The operation process is cumbersome. During the closure of the osteotomy end, the spinal canal shortens, which can easily cause twisting, squeezing or wrinkling of the spinal cord and damage the spinal cord function.
[0006] 3. During the correction process, if the position and depth of the vertebral arch screws implanted in the upper and lower vertebrae of the osteotomy area are not in the same plane, it is easy to cause ST (sagittal translation) at both ends of the osteotomy vertebra and cause spinal nerve damage.
[0007] 4. During the correction process, the degree and strength of spinal correction cannot be controlled. The degree of spinal correction often depends on the surgeon's experience and the degree of spinal cord shortening, which can easily lead to unsatisfactory correction of spinal deformity. Summary of the Invention
[0008] In view of this, the present invention provides a spinal correction device, which reconstructs a hinge structure with the spinal cord in the osteotomy area as the central fulcrum to assist the correction rod. The hinge structure of the fulcrum prevents the posterior structure of the spine from closing and causing excessive shortening of the spinal canal to damage the nerves during correction. At the same time, it can support the opening of the gap in front of the vertebral osteotomy, truly achieving the correction purpose of opening in front and closing in the back, and facilitating the subsequent implantation of titanium mesh, artificial vertebral body, cage and other materials to reconstruct the stability of the anterior and middle columns of the spine.
[0009] The technical solution adopted in the present invention is as follows: A spinal correction device includes a correction component, which includes a first correction rod and a second correction rod, the ends of the first correction rod and the second correction rod are hinged by a first rotating shaft; a plurality of screws are respectively provided on one side of the first correction rod and the second correction rod, and the first correction rod and the second correction rod are detachably connected to the heads of the screws; the other sides of the first correction rod and the second correction rod are respectively provided with a bracket perpendicular to the first correction rod and a detachable bracket, and the two brackets are respectively provided with a pressure rod, and the pressure rod is arranged along the length direction of the bracket.
[0010] In this technical solution, the bracket is connected to the correction rod detachably through a clamp; in specific implementation, the patient's spine is first osteotomized to divide it into two parts, and then pedicle screws are implanted in the vertebral bodies of the upper and lower parts. After implantation, the first correction rod and the second correction rod are respectively fixed to the screw heads, and the first rotating shaft is located in the middle position of the spinal nerves in the osteotomy area; after fixation, the two brackets are respectively fixed to the first correction rod and the second correction rod, and the pressure rods on the two brackets are in an X-shaped cross structure. At this time, the surgeon can press the two pressure rods inward respectively, so that the two pressure rods drive the first correction rod and the second correction rod respectively. The two correction rods rotate in opposite directions about the center of the first rotating shaft to drive the upper and lower parts of the spine to close; in summary, in the present invention, a hinge structure with the spinal cord in the osteotomy area as the central fulcrum is reconstructed to assist the correction rod. The hinge structure of the fulcrum prevents the posterior structure of the spine from closing and causing excessive shortening of the spinal canal to damage the nerves during correction. At the same time, it can support the opening of the gap in front of the vertebral osteotomy, truly achieving the correction purpose of opening in front and closing in the back, in order to facilitate the subsequent implantation of titanium mesh, artificial vertebrae, cage and other materials to reconstruct the stability of the anterior and middle columns of the spine. Secondly, the correction device set up can enable surgeons to standardize operations during surgery and reduce the risks of spinal surgery.
[0011] Preferably, the correction components are in two groups, and the two adjacent brackets on the left and right sides of the two groups of correction components are connected by a connecting rod, and the two pressure rods are respectively arranged on the two connecting rods; the connecting rod is a telescopic structure.
[0012] In this technical solution, the correction components are set into two groups, which are symmetrically located on the left and right sides of the spine to ensure balanced force on the spine; secondly, the two correction components are connected by a connecting rod, that is, only two pressure rods need to be operated separately to achieve correction of the upper and lower spines. Furthermore, the connecting rod is set as a telescopic structure to adapt to spines of different widths, which greatly improves the practicality of the device. Specifically, the telescopic structure is a conventional technical means, similar to the lifting structure of a bicycle lifting seat, which can be retracted and locked.
[0013] Preferably, the connection between the pressure rod and the connecting rod is located in the middle of the connecting rod, and the pressure rod and the connecting rod are detachably connected.
[0014] In this technical solution, two pressure rods are arranged in the middle of the connecting rod to ensure the force stability of the entire device. The pressure rods can be detachably connected to the connecting rod through a clamp, so that their positions can be adjusted according to changes in the length of the connecting rod. It should be explained that if the two pressure rods have the same shape and are both located in the middle of the connecting rod, mutual interference will occur. Based on this, a corner is set on the lower pressure rod so that it can be separated from the upper pressure rod to achieve the purpose of non-interference.
[0015] Preferably, the first correction rod and the second correction rod are both L-shaped structures, the L-shaped structure includes a long rod and a short rod, the long rod and the short rod are hinged by a second rotating shaft, and the second rotating shaft can be locked by a second locking structure; A first hinge piece is provided at the end of the long rod, and a second hinge piece is provided at the end of the short rod. One end of the first rotating shaft is fixed on the second hinge piece, and the first hinge piece is sleeved on the first rotating shaft; the second locking mechanism includes an external thread and a nut, the external thread is provided on the side wall of the first rotating shaft, and the nut is screwed on the first rotating shaft to tighten or loosen the first hinge piece.
[0016] In this technical solution, the first rotating shaft is located at the end of the short rod. Setting the correction rod as an L-shaped structure allows the first rotating shaft to be located in the middle of the spinal nerve in the osteotomy area. Furthermore, since the correction rod is divided into a short rod and a long rod that are hinged to each other, the angle of the short rod is adjustable, and the position of the first rotating shaft can be adjusted according to the actual situation of the patient. Furthermore, when the short rod needs to be fixed, it can be locked with a nut. In order to ensure the locking effect, a gasket can also be added.
[0017] Preferably, the short rod is a telescopic structure.
[0018] In this technical solution, it should be noted that the short rod is set as a telescopic structure so that the position of the first rotating shaft can be adjusted. Furthermore, the telescopic structure is a prior art, similar to the lifting structure of a bicycle lifting seat, which can be extended and locked.
[0019] Preferably, the head of the screw is provided with a first connecting head, the top of the first connecting head is provided with a first through slot for inserting the first correction rod or the second correction rod, and the first clamping head is screwed onto the first through slot.
[0020] In this technical solution, the correction rod is fixed on the screw through the first clamping head.
[0021] Preferably, a second connecting head is provided on one side of the first connecting head, a second through slot is provided on the top of the second connecting head, and a second clamping head is screwed on the second through slot; the second through slots in each correction group are respectively located on the side of their first through slots away from the other group of correction components; the correction component also includes an auxiliary rod, which can be inserted into the second through slot.
[0022] In this technical solution, it should be noted that in the process of spinal correction, the purpose cannot be achieved by just one correction, and multiple corrections may be required. At this time, the position of the first rotating shaft needs to be adjusted multiple times according to the correction situation. Therefore, during the adjustment process, the first correction rod and the second correction rod need to be removed, and then the position of the rotating shaft needs to be adjusted. At this time, since the spine is not restrained, it is easy to deform automatically, resulting in failure of the previous adjustments. Therefore, this solution is provided with an auxiliary rod. Before the first correction rod and the second correction rod are removed, the auxiliary rod can be fixed in the second slot to achieve the purpose of auxiliary shaping and prevent spinal deformation. Secondly, the auxiliary rod is composed of two rod bodies, and the two rod bodies are hinged and lockable, similar to the second locking mechanism. This arrangement can facilitate users to adjust the angle of the auxiliary rod according to actual conditions. After the spinal deformity is corrected, the auxiliary rod and its hinge device are first locked to maintain the corrected spinal shape, and then the first and second correction rods on both sides are taken out, and the screws are fixed with shaped titanium rods respectively, and then the auxiliary rods on both sides are taken out, and the screws are fixed with shaped titanium rods to strengthen the fixation, that is, double-rod fixation.
[0023] Preferably, a stress sensor is provided on the side wall of the screw, the first correction rod and the second correction rod are respectively provided with mutually matching rangefinders, and the first correction rod is also provided with an angle sensor. The stress sensor, rangefinder and angle sensor are respectively electrically connected to an external controller; the controller is also electrically connected to an alarm and a display screen.
[0024] In this technical solution, it should be noted that since the degree of spinal curvature varies from patient to patient, if the spinal curvature is larger, the anterior spinal vessels, anterior longitudinal ligament, and other tissues are often shortened. In this case, excessive spinal extension and correction is not recommended. Excessive extension and correction can cause rupture of the anterior spinal vessels or excessive stretching of the mesentery, leading to serious abdominal complications. For example, if a patient has a 90-degree kyphosis, correction to 60 degrees is sufficient, and overcorrection is not recommended. Therefore, this solution includes an angle sensor to sense angle changes. If the angle change exceeds or equals a set threshold, the controller activates an alarm. Furthermore, because the spinal nerves in the osteotomy area cannot be excessively wrinkled (the wrinkling degree does not exceed 1 cm), this solution includes two rangefinders to measure the shortening of the spinal nerves. If the shortening exceeds a threshold, an alarm is activated. Furthermore, a stress sensor is used to monitor the stress on the spine. If the stress exceeds a set threshold, an alarm is activated to prevent excessive force during correction, which may cause screw loosening, thereby ensuring the safety of the entire surgical process.
[0025] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:
[0026] 1. In the present invention, a hinge structure with the spinal cord at the osteotomy area as the central fulcrum is reconstructed to assist the orthotic rod. The hinge structure (first rotation axis) of the fulcrum prevents the closure of the posterior spinal structure during correction, which may lead to excessive shortening of the spinal canal and damage to the nerves. At the same time, it can support the opening of the anterior space of the vertebral body osteotomy, truly achieving the orthotic purpose of anterior opening and posterior closure. This facilitates the subsequent implantation of titanium mesh, artificial vertebral body, cage and other materials to restore the stability of the anterior and middle columns of the spine. Secondly, the provided correction device enables the surgeon to standardize the operation during the operation, reducing the risks of spinal surgery.
[0027] 2. In the present invention, the correction components are set into two groups, which are symmetrically located on the left and right sides of the spine to ensure the balance of force on the spine, avoiding the unbalanced force of the internal fixation in the traditional orthopedic surgery (first correcting and fixing one side and then correcting and fixing the other side) which is easy to cause the screws to loosen or even pull out, resulting in correction failure; secondly, the two correction components are connected by the provided connecting rod, that is, only the two pressure rods need to be operated separately to achieve the correction of the upper and lower spines, that is, the two pressure rods act as a lever in the correction process, which greatly reduces It reduces the difficulty of traditional surgical correction. The traditional spinning correction surgery is to first shape the connecting rod into an arc slightly smaller than the arc of the spinal deformity, and then tighten the inner core of the screw to act on the correction rod to pull the screw for correction. Due to the limited length of the screw tail, the curvature of the connecting rod is limited and cannot be much different from the degree of spinal deformity. In order to achieve the ideal correction effect, it is necessary to repeatedly shape the connecting rod and the shaping arc gradually becomes smaller. Then, the screws and connecting rods with different curvatures are repeatedly loosened and fixed on both sides of the spine alternately to complete the correction purpose. Third, the present invention connects the two correction components through two pressure rods, and uses the lever principle of the pressure rods with the hinge fulcrum as the center to perform correction. The correction force and degree are fully controllable. Fourth, the present invention makes the hinge fulcrum adjustable. By adjusting the fulcrum position, the degree of expansion of the anterior column of the vertebral body in the osteotomy area and the degree of closure and shortening of the posterior column can be effectively controlled during the correction process, which can effectively avoid the iatrogenic damage to the spinal nerves caused by the uncontrollable shortening of the posterior column of the spine in traditional correction surgery. Fifth, the connecting rod is designed as a telescopic structure to adapt to spines of different widths. At the same time, the connecting rod and the two correction components are designed to be detachable, which greatly improves the practicality and convenience of the device.
[0028] 3. In the present invention, various sensors are provided to transmit the real-time status of the collected data to the surgeon in a digital and visual manner. The surgeon adjusts the degree of correction in real time based on the above data to prevent iatrogenic damage to the spinal nerves during the correction process. BRIEF DESCRIPTION OF THE DRAWINGS
[0029] The present invention will now be described by way of example with reference to the accompanying drawings, in which: Figure 1 It is a schematic diagram of spinal correction in the prior art; Figure 2 is a schematic diagram of a prior art spine; Figure 3 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 4 It is a schematic diagram of the disassembled three-dimensional structure of the auxiliary rod and the correction component of the present invention; Figure 5 1 is a schematic side view of the three-dimensional structure of the first correction rod and the second correction rod of the present invention; Figure 6 yes Figure 5 Schematic diagram of the local three-dimensional structure; Figure 7 yes Figure 6 A magnified schematic diagram of point A in the middle; Figure 8 is a schematic diagram of the three-dimensional structure of the screw and correction assembly of the present invention without the auxiliary rod; Figure 9 It is a schematic diagram of the three-dimensional structure of the screw of the present invention; Figure 10 This is a schematic diagram of the structure of the present invention installed in the human spine. Reference numerals
[0030] 1-correction assembly, 10-first correction rod, 11-long rod, 111-first hinge plate, 12-short rod, 121-second hinge plate, 123-second rotating shaft, 124-external thread, 125-washer, 126-nut, 13-first rotating shaft, 14-angle sensor, 20-second correction rod, 30-auxiliary rod, 40-screw, 41-first connecting head, 411-first through slot, 42-first clamping head, 43-second connecting head, 44-second clamping head, 441-second through slot, 45-stress sensor, 46-rangefinder, 50-bracket, 51-connecting rod, 52-pressure rod, 521-corner, 53-handle. DETAILED DESCRIPTION
[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.
[0032] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.
[0033] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other.
[0034] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.
[0035] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.
[0036] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. Example
[0037] like Figure 1-9 As shown, a spinal correction device is disclosed in an embodiment of the present invention, including a correction component 1, wherein the correction component 1 includes a first correction rod 10 and a second correction rod 20, and the ends of the first correction rod 10 and the second correction rod 20 are hinged by a first rotating shaft 13; a plurality of screws 40 are respectively provided on one side of the first correction rod 10 and the second correction rod 20, and the first correction rod 10 and the second correction rod 20 are detachably connected to the heads of the screws 40; the other sides of the first correction rod 10 and the second correction rod 20 are respectively provided with a bracket 50 perpendicular to the first correction rod 10 and the second correction rod 20, and a pressure rod 52 is respectively provided on the two brackets 50, and the pressure rod 52 is arranged along the length direction of the bracket 50.
[0038] It should be noted that the bracket 50 is detachably connected to the correction rod through a clamp, and a grip 53 is provided on the pressure rod 52; in specific implementation, the patient's spine is first osteotomized to divide it into two parts, and then screws 40 are implanted in the upper and lower parts of the spine. After implantation, the first correction rod 10 and the second correction rod 20 are respectively fixed to the heads of the screws 40, and the first shaft 13 is located in the middle of the spinal nerves in the osteotomy area; after fixation, the two brackets 50 are respectively fixed to the first correction rod 10 and the second correction rod 20, and the pressure rods 52 on the two brackets 50 are in an X-shaped cross structure. At this time, the surgeon can press the two pressure rods 52 inwards respectively so that the two pressure rods The rod 52 drives the first correction rod 10 and the second correction rod 20 to rotate in opposite directions around the center of the first rotating shaft 13, so as to drive the upper and lower parts of the spine to close; in summary, in the present invention, a hinge structure with the spinal cord in the osteotomy area as the central fulcrum is reconstructed to assist the correction rod. The hinge structure of the fulcrum prevents the posterior structure of the spine from being closed and causing excessive shortening of the spinal canal to damage the nerves during correction. At the same time, it can support the opening of the gap in front of the vertebral osteotomy, truly achieving the correction purpose of opening in front and closing in the back, in order to facilitate the subsequent implantation of titanium mesh, artificial vertebral body, cage and other materials to reconstruct the stability of the anterior and middle columns of the spine. Secondly, the correction device set up can enable the surgeon to standardize the operation during the operation and reduce the risk of spinal surgery.
[0039] like Figure 3-Figure 4 As shown, in this embodiment, the correction components 1 are divided into two groups, and the two adjacent brackets 50 in the two groups of correction components 1 are connected by a connecting rod 51, and the two pressure rods 52 are respectively provided on the two connecting rods 51; the connecting rod 51 is a retractable structure.
[0040] It should be noted that the correction components 1 are set as two groups, which are symmetrically located on the left and right sides of the spine to ensure balanced force on the spine; secondly, the two correction components 1 are connected by a connecting rod 51, that is, only the two pressure rods 52 need to be operated separately to achieve correction of the upper and lower spines. Furthermore, the connecting rod 51 is set as a telescopic structure to adapt to spines of different widths, which greatly improves the practicality of the device. Specifically, the telescopic structure is a conventional technical means, similar to the lifting structure of a bicycle lifting seat, which can be retracted and locked.
[0041] like Figure 3-Figure 4 As shown, in this embodiment, the connection between the pressure rod 52 and the connecting rod 51 is located in the middle of the connecting rod 51, and the pressure rod 52 and the connecting rod 51 are detachably connected.
[0042] It needs to be clear that setting two pressing rods 52 at the middle of the connecting rod 51 can ensure the stability of the force of the whole device, and the pressing rod 52 can be detachably connected with the connecting rod 51 through a hoop, so that it can be adjusted according to the length change of the connecting rod 51; it needs to be explained that if the shapes of the two pressing rods 52 are the same and they are both located at the middle of the connecting rod 51, mutual interference will occur, based on which, the lower pressing rod 52 is provided with a corner 521, so that it can be separated from the upper pressing rod 52, achieving the purpose of not interfering with each other.
[0043] As shown in Figure 5-Figure 7 , in the embodiment, the first correction rod 10 and the second correction rod 20 are both L-shaped structures, the L-shaped structure includes a long rod 11 and a short rod 12, the long rod 11 and the short rod 12 are hinged through a second rotating shaft 123, and the second rotating shaft 123 can be locked through a second locking structure; The end of the first long rod 11 is provided with a first hinged piece 111, the end of the short rod 12 is provided with a second hinged piece 121, one end of the first rotating shaft 13 is fixed on the second hinged piece 121, and the first hinged piece 111 is sleeved on the first rotating shaft 13; the second locking mechanism includes an external thread 124 and a nut 126, the external thread 124 is arranged on the side wall of the first rotating shaft 13, and the nut 126 is screwed on the first rotating shaft 13, so as to press or loosen the first hinged piece 111.
[0044] It needs to be explained that the first rotating shaft 13 is located at the end of the short rod 12, and setting the correction rod as an L-shaped structure can make the first rotating shaft 13 located at the middle of the spinal nerve in the osteotomy area, further, since the correction rod is divided into the short rod 12 and the long rod 11 which are hinged with each other, the angle of the short rod 12 can be adjusted, that is, the position of the first rotating shaft 13 can be adjusted according to the actual situation of the patient, further, when it is necessary to fix the short rod 12, the nut 126 can be used to lock it, in order to ensure the locking effect, a gasket 125 can also be added.
[0045] As shown in Figure 6 , in the embodiment, the short rod 12 is a telescopic structure. It needs to be explained that setting the short rod 12 as a telescopic structure makes the position of the first rotating shaft 13 adjustable, further, the telescopic structure is a prior art, similar to the lifting structure of a bicycle saddle, which can be telescopic and can also be locked.
[0046] As shown in Figure 8-Figure 9 , in the embodiment, the head of the screw 40 is provided with a first connecting head 41, the top of the first connecting head 41 is provided with a first through slot 411 for inserting the first correction rod 10 or the second correction rod 20, and the first through slot 411 is screwed with a first pressing head 42.
[0047] It needs to be explained that the correction rod is fixed on the screw 40 through the first pressing head 42.
[0048] like Figure 8-Figure 9 As shown, in this embodiment, a second connecting head 43 is provided on one side of the first connecting head 41, a second through slot 441 is provided on the top of the second connecting head 43, and a second clamping head 44 is screwed on the second through slot 441; the second through slots 441 in each correction group are respectively located on the side of their first through slots 411 away from the other group of correction components 1; the correction component 1 also includes an auxiliary rod 30, which can be inserted into the second through slot 441.
[0049] It should be noted that in the process of spinal correction, the purpose cannot be achieved by just one correction, and multiple corrections may be required. At this time, the position of the first rotating shaft 13 needs to be adjusted multiple times according to the correction situation. Therefore, during the adjustment process, the first correction rod 10 and the second correction rod 20 need to be removed, and then the position of the rotating shaft needs to be adjusted. At this time, since the spine is not restrained, it is easy to deform automatically, resulting in the failure of the previous adjustments. Therefore, this solution is provided with an auxiliary rod 30. After the first correction rod 10 and the second correction rod 20 are removed, the auxiliary rod 30 can be fixed in the second slot to achieve the purpose of auxiliary shaping and prevent spinal deformation; secondly, the auxiliary rod 30 is composed of two rod bodies, and the two rod bodies are hinged and lockable, similar to the second locking mechanism. This setting can facilitate users to adjust the angle of the auxiliary rod 30 according to actual conditions.
[0050] like Figure 5 As shown, in this embodiment, a stress sensor 45 is provided on the side wall of the screw 40, and the first correction rod 10 and the second correction rod 20 are respectively provided with mutually matching rangefinders 46, and the first correction rod 10 is also provided with an angle sensor. The stress sensor 45, the rangefinder 46 and the angle sensor are respectively electrically connected to the external controller; the controller is also electrically connected to an alarm.
[0051] It should be noted that since the degree of curvature of the spine of each patient is different, if the patient's spine is more curved, the spine will squeeze the blood vessels and other tissues of the human body. In other words, the spine cannot be adjusted excessively at this time. If it is adjusted excessively, the spine will squeeze the blood vessels. For example, if the patient's spine is curved ninety degrees, it only needs to be corrected to sixty degrees. It cannot be over-adjusted. Therefore, an angle sensor 14 is provided in this solution to sense the angle change. If the angle change exceeds or equals the set threshold, the controller will control the alarm to start. On the other hand, since the spinal nerves in the osteotomy area cannot be excessively wrinkled (the wrinkling degree does not exceed 1 cm), two rangefinders 46 are provided in this solution to measure the shortening of the spinal nerves. If the shortening exceeds the threshold, the alarm is controlled to start. Secondly, the stress sensor 45 is used to monitor the force applied to the spine. If the force exceeds the set threshold, the alarm is controlled to start, thereby ensuring the safety of the entire surgical process.
[0052] The working principle of the present invention is: First, the patient's spine is osteotomized to divide it into two parts, and then screws 40 are implanted on both sides of the spine of the upper and lower parts. After implantation, the length of the connecting rod 51 is adjusted according to the width of the patient's spine. After adjustment, the first correction rod 10 and the second correction rod 20 are respectively fixed to the head of the screw 40, and the first rotation axis 13 is located in the middle position of the spinal nerve in the osteotomy area; after fixation, the two brackets 50 are respectively fixed to the first correction rod 10 and the second correction rod 20, and the pressure rods 52 on the two brackets 50 are in an X-shaped cross structure. At this time, the surgeon can press the two pressure rods 52 inward respectively, so that the two pressure rods 52 respectively drive the first correction rod 10 and the second correction rod 20 to rotate in opposite directions about the center of the first rotation axis 13 to drive the upper and lower parts of the spine to close; at this time, the angle sensor, stress sensor 45 and rangefinder 46 implement monitoring of surgical data to reduce the risk of surgery.
[0053] The circuits, electronic components and modules involved are all existing technologies and can be fully implemented by those skilled in the art. Needless to say, the content protected by the present invention does not involve improvements to software and methods.
[0054] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.
[0055] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A spinal correction device, characterized in that: The invention comprises a correction component (1), wherein the correction component (1) comprises a first correction rod (10) and a second correction rod (20), and ends of the first correction rod (10) and the second correction rod (20) are hinged via a first rotating shaft (13); A plurality of screws (40) are respectively provided on one side of the first correction rod (10) and the second correction rod (20), and the first correction rod (10) and the second correction rod (20) are detachably connected to the heads of the screws (40); The other side of the first correction rod (10) and the second correction rod (20) is respectively provided with a bracket (50) perpendicular thereto and detachable thereto, and the two brackets (50) are respectively provided with a pressure rod (52), and the pressure rod (52) is arranged along the length direction of the bracket (50).
2. A spinal correction device according to claim 1, characterized in that: The correction components (1) are divided into two groups. Two adjacent brackets (50) in the two groups of correction components (1) are connected by a connecting rod (51), and the two pressure rods (52) are respectively arranged on the two connecting rods (51).
3. A spinal correction device according to claim 2, characterized in that: The connecting rod (51) is a telescopic structure.
4. A spinal correction device according to claim 3, characterized in that: The connection point between the pressure rod (52) and the connecting rod (51) is located in the middle of the connecting rod (51), and the pressure rod (52) and the connecting rod (51) are detachably connected.
5. The spinal correction device according to claim 1, characterized in that: The first correction rod (10) and the second correction rod (20) are both L-shaped structures, and the L-shaped structure includes a long rod (11) and a short rod (12). The long rod (11) and the short rod (12) are hinged through a second rotating shaft (123), and the second rotating shaft (123) can be locked by a second locking structure.
6. The spinal correction device according to claim 5, characterized in that: The end of the long rod (11) is provided with a first hinge piece (111), the end of the short rod (12) is provided with a second hinge piece (121), one end of the first rotating shaft (13) is fixed on the second hinge piece (121), and the first hinge piece (111) is sleeved on the first rotating shaft (13); the second locking mechanism includes an external thread (124) and a nut (126), the external thread (124) is provided on the side wall of the first rotating shaft (13), and the nut (126) is screwed on the first rotating shaft (13) to tighten or loosen the first hinge piece (111).
7. The spinal correction device according to claim 6, characterized in that: The short rod (12) is a telescopic structure.
8. A spinal correction device according to any one of claims 1 to 7, characterized in that: The head of the screw (40) is provided with a first connecting head (41), the top of the first connecting head (41) is provided with a first through slot (411) for inserting the first correction rod (10) or the second correction rod (20), and the first pressing head (42) is screwed onto the first through slot (411).
9. The spinal correction device according to claim 8, characterized in that: A second connecting head (43) is provided on one side of the first connecting head (41), a second through slot (441) is provided on the top of the second connecting head (43), and a second pressing head (44) is screwed onto the second through slot (441); The second through slots (441) in each correction group are respectively located on a side of the first through slots (411) thereof away from the other correction component (1); The correction component (1) further comprises an auxiliary rod (30), and the auxiliary rod (30) can be inserted into the second through slot (441).
10. The spinal correction device according to claim 9, characterized in that: A stress sensor (45) is provided on the side wall of the screw (40), and the first correction rod (10) and the second correction rod (20) are respectively provided with mutually matching distance meters (46). The first correction rod (10) is also provided with an angle sensor (14). The stress sensor (45), the distance meter (46) and the angle sensor (14) are respectively electrically connected to an external controller; and the controller is also electrically connected to an alarm and a display screen.