Measuring scale based on spinal surgery

Abstract

The application provides a measuring scale based on spinal surgery. When the depth of the resection position needs to be measured, the measuring scale based on spinal surgery is used for measurement. The measuring assembly is pushed to move, the measuring assembly moves relative to the measuring end, the connecting assembly is driven to move, the reading assembly is driven to move by the movement of the connecting assembly, and the stroke length of the measuring assembly relative to the measuring end is measured. Since the scale surface is perpendicular to the measuring end, the reading process does not need to be straight, the line of sight is directly lowered to be perpendicular to the scale surface, the reading can be accurately and quickly performed, and the measurement error problem caused by the line of sight error is avoided. Secondly, since the scale surface is perpendicular to the measuring end, the doctor does not need to squat to complete the measurement, and the measurement speed is improved. Meanwhile, the main doctor and the first surgical assistant can synchronously and clearly read the scale during the measurement, and the accuracy of the reading result is improved by mutual correction.

Description

Technical Field

[0001] This application relates to the field of medical devices, and more particularly to a measuring ruler based on spinal surgery. Background Technology

[0002] Cervical spondylosis is a group of diseases caused by cervical disc degeneration or pathological changes in the cervical vertebrae's bony structures that irritate or compress the spinal cord or nerve roots, resulting in a series of clinical symptoms and signs. Currently, the main surgical approaches for treating cervical spondylosis include the anterior approach, posterior approach, and combined anterior and posterior approach. Among these, the anterior cervical approach can directly remove the causative structures, achieving thorough decompression, and is widely used in clinical practice. Currently, most anterior cervical surgeries, including cervical discectomy and fusion (ACDF) and cervical corpectomy and fusion (ACCF), have been proven safe and effective. For the treatment of specific pathological types of cervical spondylosis (such as ossification of the posterior longitudinal ligament of the cervical spine), Professor Shi Jiangang's team at Shanghai Changzheng Hospital proposed a novel anterior cervical decompression and fusion procedure, namely anterior cervical control vertebral ossification complex fusion (ACAF). Numerous studies have shown that this surgical technique has achieved good clinical efficacy in treating ossification of the posterior longitudinal ligament of the cervical spine and has gained widespread recognition from scholars both domestically and internationally.

[0003] In clinical practice, ACDF (acute intervertebral disc herniation) is usually the first-line treatment for patients with cervical spondylosis who do not respond to conservative treatment, especially those with simple cervical disc herniation or focal ossification of the posterior longitudinal ligament. The characteristic of ACDF is that it only removes the intervertebral disc and part of the posterior vertebral body osteophytes, without extensively altering the vertebral body, thus achieving decompression while minimizing vertebral damage. However, because ACDF can only be performed at the intervertebral disc level, the operating space is limited and the field of vision is narrow. If the surgeon needs to measure the depth of the intervertebral space to determine the amount of bone graft and the size of the fusion cage, the currently available surgical measuring rulers are difficult to use within the limited surgical field to enter the intervertebral space and accurately align with the target structure, making the operation inconvenient and affecting the accuracy of the measurement results.

[0004] Compared to ACDF, ACCF achieves greater decompression space by removing part of the vertebral body. Its technical feature is that sufficient surgical space is obtained through vertebral body resection, and the compressive material (such as ossified posterior longitudinal ligament) at the posterior edge of the vertebral body is directly treated. The vertebral body is subtotally removed based on the compression range indicated by preoperative CT and MRI. During the vertebral body resection, the surgeon needs to precisely control the depth and width of the resection to avoid excessive resection which may lead to cervical spine instability and affect postoperative recovery. At the same time, the surgeon needs to accurately measure to assess the amount of vertebral body removed to ensure complete resection of the vertebral body and appropriate bone graft material. Inaccurate intraoperative measurements may lead to the following problems: (1) if the resection depth is too shallow, the diseased tissue cannot be completely removed, and the decompression effect cannot be achieved; (2) if the resection is too deep, it may lead to postoperative instability, increase the risk of complications (such as pseudoarthrosis or spinal cord compression), and even affect the postoperative fusion effect. However, in ACCF surgery, due to the removal of part of the vertebral body, the amount of bleeding is large, the surgical area is blurred, and the scale lines of the ruler are difficult to clearly see. When using commercially available surgical measuring rulers (steel rulers, vernier calipers) for measurement, the surgeon needs to bend over or squat to get as close to the scale as possible to obtain the reading, which is time-consuming and the reading may not be accurate. In addition, due to the limitations of the ruler, only the surgeon can vaguely read the scale value during measurement, while other surgical assistants cannot take the reading. The lack of a step for multiple people to calibrate the values ​​may result in a large error in the final measurement result.

[0005] ACAF (Anterior Longitudinal Ligament Fibrostomy) is currently the mainstream surgical procedure for treating complex types of cervical spondylosis, such as ossification of the posterior longitudinal ligament. Its technical characteristics include removing the anterior bone of the vertebral body, creating a groove in the vertebral body from the medial side of the uncovertebral joints on both sides, using appropriately pre-bent plates and screws to separate the ossified vertebral body complex from the surrounding bony structures, and then suspending and lifting it anteriorly to decompress the spinal canal without removing the posterior compressive tissue. Studies have shown that surgeons should pay attention to vertical groove and vertical lifting during the groove and lifting process. The actual lifting distance of the vertebral body can be affected by the curvature of the pre-bent titanium plate; therefore, it is crucial to measure the depth of the vertebral body resection and the groove, and to determine the thickness of the anterior bone resection during the operation. Before performing ACAF surgery, the surgeon needs to accurately assess the size, shape, and extent of the diseased vertebral body through imaging examinations (such as CT and MRI). During vertebral body resection, the surgeon should precisely control the extent and depth of the resection to ensure that the resected vertebral body does not exceed the planned range, thus maintaining the stability of the cervical spine. If the resection depth is too shallow, the diseased tissue may not be completely removed, leading to recurrence or ineffective relief of nerve compression; conversely, if the resection is too deep, it may damage the normal vertebral structure, causing instability and affecting postoperative fusion. Currently, in clinical practice, surgeons primarily use other surgical instruments, such as nerve dissectors, to replace rulers in measuring and assessing the depth of vertebral resection and the thickness of prevertebral bone removal. Furthermore, when surgeons need to measure the depth of the notch, currently available rulers are often unable to accurately measure within the notch due to their width or thickness, forcing surgeons to rely on clinical experience to estimate the notch depth. Therefore, in ACAF surgery, surgeons urgently need a small, accurate, and easy-to-read spinal measuring ruler to measure the depth of notch and vertebral resection. Precise measurement helps reduce complications, ensures surgical success, and optimizes postoperative outcomes.

[0006] In addition, the current treatment for spinal tumors is a comprehensive treatment that combines surgery, radiotherapy, and chemotherapy. However, in cases of pathological fractures, spinal cord compression, spinal instability, and radicular pain, surgery becomes the primary treatment. After spinal tumor resection, in order to maintain spinal stability, it is usually necessary to reconstruct the vertebral body through internal fixation (such as metal implants, artificial vertebral bodies, or bone grafts) to ensure normal spinal function and range of motion after surgery. When performing vertebral reconstruction, it is essential to accurately measure the depth of the resected vertebral body, which is mainly reflected in the following aspects: (1) Ensure complete tumor resection: The surgeon needs to accurately measure the resection depth to ensure that the tumor is completely removed and to avoid tumor residue affecting postoperative recovery or recurrence; (2) Ensure the stability of vertebral reconstruction: When using artificial vertebral bodies or bone grafts for vertebral reconstruction after surgery, it is necessary to ensure the compatibility between the implant or bone graft and the original vertebral body. If the resection depth is not precise, the size of the implant may be unsuitable, resulting in insecure fixation and affecting the stability of the spine; (3) Avoid over-resection: Excessive resection depth may lead to spinal instability, damage to adjacent tissues or nerve structures, and affect postoperative functional recovery; (4) Determine the appropriate location of bone graft or internal fixation material: Measuring the depth of the vertebral body is crucial for the selection of bone graft or internal fixation material. Through accurate measurement, the appropriate amount of bone graft and the length of internal fixation material can be selected to avoid implants being too long or too short, ensuring the surgical effect. However, the spinal measuring rulers currently on the market are difficult to achieve rapid, effective, and accurate measurement in spinal tumor surgery.

[0007] In conclusion, ruler measurement is indispensable in all types of spinal surgery, and accurate ruler measurement is one of the key factors ensuring surgical success and patient recovery. Precise and rapid measurement can significantly improve surgical accuracy, efficiency, and safety, shorten operation time, and reduce intraoperative complications. Therefore, there is an urgent need for an innovative spinal measuring ruler in spinal surgery, possessing the following characteristics: 1. Easy to operate; the surgeon does not need to bend over or lower their head, allowing for rapid and accurate measurement under direct vision; 2. Multi-party calibration; surgical assistants can read the values ​​simultaneously, and multiple surgeons can simultaneously calibrate the readings, reducing measurement and reading errors; 3. High flexibility; the ruler's small size facilitates operation in confined spaces, making it suitable for the precise measurement needs of various spinal surgical procedures. This spinal measuring ruler will greatly improve surgical efficiency and accuracy, and reduce surgical risks. Summary of the Invention

[0008] In view of this, it is necessary to provide a measuring ruler based on spinal surgery to solve the above problems.

[0009] Embodiments of this application provide a measuring ruler based on spinal surgery, comprising:

[0010] The housing has a reading end and a measuring end, the reading end having a scale surface perpendicular to the measuring end;

[0011] A reading component is disposed at the reading end and points to the scale on the scale surface;

[0012] A measuring component is disposed on the measuring end;

[0013] A connecting component, with its two ends respectively connected to the reading component and the measuring component;

[0014] The measuring component moves to drive the reading component to move on the scale surface, thereby indicating the stroke length of the measuring component relative to the measuring end.

[0015] In at least one embodiment of this application, the connection component includes:

[0016] The first rotating gear has one end meshing with the measuring component;

[0017] The second rotating gear has one end meshing with the reading component;

[0018] A connecting belt is sleeved on the outside of the first rotating gear and the second rotating gear, and meshes with the first rotating gear and the second rotating gear respectively.

[0019] In at least one embodiment of this application, the first rotating gear is provided with a first meshing portion and a second meshing portion coaxially disposed with the first meshing portion;

[0020] The measurement component includes:

[0021] The measuring component is provided with a first rack portion, which is engaged with the first meshing portion.

[0022] The measuring end has a movable cavity, and the measuring element is movably housed within the movable cavity;

[0023] The second engaging portion engages with the connecting band;

[0024] The measuring component is adjusted so that it extends out of the movable cavity, which in turn drives the connecting assembly to move, thereby driving the reading assembly to move on the scale surface to indicate the travel length of the measuring component relative to the measuring end.

[0025] In at least one embodiment of this application, the measuring element is provided with a receiving groove, the first rack portion is disposed on the side wall of the receiving groove, the first rotating gear is located in the receiving groove, and the first rotating gear is rotatably connected to the housing;

[0026] The measuring end is provided with a guide groove that communicates with the movable cavity, and the length directions of both the guide groove and the movable cavity are set along the length direction of the measuring end;

[0027] The measuring element is provided with a pushing part, which extends to the outside through the movable cavity and the guide groove;

[0028] One end of the connecting strip is located inside the receiving slot, and the other end extends to the reading end.

[0029] In at least one embodiment of this application, the reading end is provided with a groove communicating with the movable cavity;

[0030] The reading component includes:

[0031] The first reading element is slidably disposed within the groove;

[0032] The second reading element is slidably disposed within the groove;

[0033] The connection component also includes:

[0034] A first connecting gear is disposed in the slide groove and meshes with the first reading element and the second rotating gear respectively;

[0035] The second connecting gear is disposed in the slide groove and meshes with the second reading element and the second rotating gear respectively;

[0036] The second rotating gear drives the first connecting gear and the second connecting gear to rotate, thereby causing the first reading element and the second reading element to slide in the groove so as to point to the scale on the scale surface.

[0037] In at least one embodiment of this application, the first reading element is provided with a second rack portion;

[0038] The first connecting gear includes:

[0039] The third meshing part meshes with the second rotating gear;

[0040] The fourth engagement part is coaxially arranged with the third engagement part, and the fourth engagement part engages with the second rack part to push the first reading element to slide in the groove.

[0041] In at least one embodiment of this application, the second reading element is provided with a third rack portion;

[0042] The second connecting gear includes:

[0043] The fifth meshing part is engaged with the second rotating gear;

[0044] The sixth meshing part is coaxially arranged with the fifth meshing part, and the sixth meshing part meshes with the third rack part to push the second reading element to slide in the groove.

[0045] In at least one embodiment of this application, the first connecting gear and the second connecting gear are respectively located on both sides of the second rotating gear;

[0046] The fourth meshing part, the sixth meshing part, and the first meshing part have the same shape and size.

[0047] In at least one embodiment of this application, a 0-scale line is provided in the middle of the scale surface, and two measurement scale areas are provided equidistantly from the 0-scale line to both ends, with the first reading element and the second reading element pointing to the two measurement scale areas respectively.

[0048] In at least one embodiment of this application, a slot is provided on the inner wall of the movable cavity;

[0049] The measurement component also includes:

[0050] The abutting part has an abutting end at one end and a locking part at the other end;

[0051] An elastic element, one end of which abuts against the end of the abutting element;

[0052] The measuring element has a groove at one end away from the reading end, and the other end of the elastic element abuts against the groove;

[0053] The measuring component has a connecting groove, one end of which is connected to the groove and the other end of which is connected to the movable cavity;

[0054] One end of the engaging portion passes through the groove, and the communicating groove extends into the movable cavity;

[0055] The outer circumferential surface of the measuring component is provided with a guide plate;

[0056] The elastic element abuts against the outside to drive the engaging part to abut against the guide plate, so that the engaging part deforms and engages with the slot part.

[0057] The measuring ruler based on spinal surgery implemented in this embodiment will have at least the following beneficial effects:

[0058] The aforementioned measuring ruler based on spinal surgery is used to measure the resection depth of the resection site. This measurement pushes the measuring component to move relative to the measuring end, which in turn drives the connecting component to move. The movement of the connecting component then drives the reading component to move, thereby measuring the stroke length of the measuring component relative to the measuring end.

[0059] Because the scale is perpendicular to the measuring end, it is not necessary to look straight ahead during the reading process. You can simply lower your head and align your line of sight with the scale to make accurate and quick readings, thus avoiding errors caused by line-of-sight errors.

[0060] Secondly, since the scale is perpendicular to the measuring end, the measurement can be completed without the doctor having to squat down, thus increasing the measurement speed. At the same time, during the measurement, the surgeon's assistant can also see the reading directly and clearly, and the two can correct each other to reduce errors caused by the reading.

[0061] Third, we designed a baffle on the side wall of the ruler's outer casing. During use, simply align the baffle with the surface of the groove or cone to be measured; this indicates that the ruler is positioned on the groove surface, and the ruler's scale is at 0. This eliminates the need for surgeons to manually calibrate the 0 mark to ensure it is flush with the surface of the element being measured, thus shortening measurement time and improving the accuracy of the measurements.

[0062] Finally, this spinal measuring ruler also avoids the situation where inaccurate measurement results lead to the removal of vertebrae or the opening of grooves that are too shallow or too deep during spinal surgery, resulting in insufficient decompression due to insufficient removal or damage to the spinal cord or blood vessels due to excessive removal, thereby reducing the incidence of intraoperative complications and improving surgical outcomes. Attached Figure Description

[0063] Figure 1 A structural diagram of a measuring ruler used in spinal surgery;

[0064] Figure 2 for Figure 1 Exploded view of a measuring ruler based on spinal surgery;

[0065] Figure 3 for Figure 2 Schematic diagram of the structure of the measuring component;

[0066] Figure 4 for Figure 2 Structural diagram of the first connecting gear in the middle;

[0067] Figure 5 for Figure 2 Structural diagram of the second connecting gear;

[0068] Figure 6 A cross-sectional view of the measuring ruler used in spinal surgery in its initial state;

[0069] Figure 7 for Figure 6 A partial schematic diagram of point A in the middle;

[0070] Figure 8 for Figure 6 Enlarged view of a portion of point B in the middle;

[0071] Figure 9 This is a cross-sectional view of the measuring ruler used in spinal surgery (when engaged).

[0072] Figure 10 for Figure 9 A partial square diagram at point C in the middle;

[0073] Figure 11 for Figure 9 A magnified view of a portion of point D in the middle.

[0074] Explanation of main component symbols

[0075] 100. Measuring ruler based on spinal surgery;

[0076] 110. Housing; 111. Reading end; 112. Measuring end; 111a. Scale surface; 112a. Movable cavity; 112b. Guide groove; 111b. Slide groove; 111c. Measuring scale area; 112c. Slot;

[0077] 120. Reading assembly; 121. First reading element; 1211. Second rack section; 122. Second reading element; 1221. Third rack section; 123. Leveling section;

[0078] 130. Measuring assembly; 131. Measuring component; 1311. First rack portion; 131a. Receiving groove; 1312. Pushing portion; 132. Abutting component; 1321. Abutting end; 1322. Engaging portion; 133. Elastic component; 131b. Groove; 131c. Communicating groove; 134. Guide plate;

[0079] 140. Connecting assembly; 141. First rotating gear; 1411. First meshing part; 1412. Second meshing part; 142. Second rotating gear; 143. Connecting belt; 144. First connecting gear; 145. Second connecting gear; 1441. Third meshing part; 1442. Fourth meshing part; 1451. Fifth meshing part; 1452. Sixth meshing part. Detailed Implementation

[0080] The embodiments of this application will now be described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0081] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or may also have an intervening component. When a component is considered to be "placed" on another component, it can be directly placed on the other component or may also have an intervening component. The terms "top," "bottom," "upper," "lower," "left," "right," "front," "back," and similar expressions used in this article are for illustrative purposes only.

[0082] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0083] Embodiments of this application provide a measuring ruler 100 based on spinal surgery, comprising:

[0084] The housing 110 has a reading end 111 and a measuring end 112. The reading end 111 has a scale surface 111a, which is perpendicular to the measuring end 112.

[0085] A reading component 120 is disposed at the reading end 111 and points to the scale on the scale surface 111a;

[0086] A measuring component 130 is disposed on the measuring end 112;

[0087] The connecting component 140 is connected at both ends to the reading component 120 and the measuring component 130, respectively.

[0088] The measuring component 130 moves to drive the reading component 120 to move on the scale surface 111a, thereby indicating the stroke length of the measuring component 130 relative to the measuring end 112.

[0089] Example 1:

[0090] Please refer to Figures 1-4 In this embodiment, when it is necessary to measure the resection depth of the resection site, a measuring ruler 100 based on spinal surgery is used for measurement. The measuring component 130 is pushed to move, so that the measuring component 130 moves relative to the measuring end 112, which drives the connecting component 140 to move. The movement of the connecting component 140 drives the reading component 120 to move, so as to measure the stroke length of the measuring component 130 relative to the measuring end 112.

[0091] Since the scale surface 111a is perpendicular to the measuring end 112, it is not necessary to look straight ahead during the reading process. Simply lower your head and align your line of sight with the scale surface 111a to accurately and quickly take the reading, thus avoiding errors caused by line of sight errors.

[0092] Secondly, since the scale surface 111a is perpendicular to the measurement end 112, the doctor does not need to squat down to complete the measurement, which can improve the measurement speed. At the same time, during the measurement process, the assistant of the surgeon can also directly and clearly see the reading synchronously. The two can correct each other to reduce the error caused by the reading.

[0093] Thirdly, we designed a baffle on the side wall of the ruler housing. During use, just fit the baffle to the surface of the groove or cone to be measured, which indicates that the ruler is already on the surface of the groove, and at the same time, the scale of the ruler is at 0. When using, there is no need for the surgeon to deliberately correct whether the 0 scale line is flush with the surface of the element to be measured, which shortens the measurement time and improves the accuracy of the measurement value.

[0094] Finally, this spinal measurement ruler also avoids the situation where due to inaccurate measurement results, the vertebrae or grooves removed during spinal surgery are too shallow or too deep, resulting in insufficient decompression due to insufficient resection or damage to the spinal cord or blood vessels due to excessive resection, reducing the incidence of intraoperative complications and improving the surgical effect.

[0095] It should be noted that the housing 110 is generally in the shape of a "T".

[0096] The scale surface 111a is a plane on the side away from the measurement end 112. The measurement end 112 is the lower part of the "T" - shaped structure (similar to "|"), and the shape of the reading end 111 is generally the upper part of the "T" - shaped structure (similar to "—").

[0097] In at least one embodiment of the present application, the connection component 140 includes:

[0098] A first rotating gear 141, one end of which is meshed and connected with the measurement component 130;

[0099] A second rotating gear 142, one end of which is meshed and connected with the reading component 120;

[0100] A connecting belt 143, sleeved outside the first rotating gear 141 and the second rotating gear 142, and meshed and connected with the first rotating gear 141 and the second rotating gear 142 respectively.

[0101] In at least one embodiment of the present application, the first rotating gear 141 is provided with a first meshing portion 1411 and a second meshing portion 1412 coaxially arranged with the first meshing portion 1411;

[0102] The measurement component 130 includes:

[0103] A measuring member 131, provided with a first rack portion 1311, and the first rack portion 1311 is meshed and connected with the first meshing portion 1411; <000023

[0104] The measuring end 112 has a movable cavity 112a, and the measuring element 131 is movably housed in the movable cavity 112a;

[0105] The second engaging portion 1412 engages with the connecting band 143;

[0106] The measuring component 131 is adjusted so that it extends out of the movable cavity 112a, thereby driving the connecting component 140 to move, which in turn drives the reading component 120 to move on the scale surface 111a to indicate the stroke length of the measuring component 130 relative to the measuring end 112.

[0107] In at least one embodiment of this application, the measuring member 131 is provided with a receiving groove 131a, the first rack portion 1311 is provided on the side wall of the receiving groove 131a, the first rotating gear 141 is located in the receiving groove 131a, and the first rotating gear 141 is rotatably connected to the housing 110.

[0108] The measuring end 112 is provided with a guide groove 112b that communicates with the movable cavity 112a. The length directions of the guide groove 112b and the movable cavity 112a are both arranged along the length direction of the measuring end 112.

[0109] The measuring element 131 is provided with a pushing part 1312, which extends to the outside through the movable cavity 112a and the guide groove 112b.

[0110] One end of the connecting strip 143 is located in the receiving groove 131a, and the other end extends to the reading end 111.

[0111] In at least one embodiment of this application, the reading end 111 is provided with a groove 111b communicating with the movable cavity 112a;

[0112] The reading component 120 includes:

[0113] The first reading element 121 is slidably disposed within the slide groove 111b;

[0114] The second reading element 122 is slidably disposed within the slide groove 111b;

[0115] The connection component 140 further includes:

[0116] The first connecting gear 144 is disposed in the slide groove 111b and meshes with the first reading element 121 and the second rotating gear 142 respectively.

[0117] The second connecting gear 145 is disposed in the slide groove 111b and meshes with the second reading element 122 and the second rotating gear 142 respectively.

[0118] The second rotating gear 142 drives the first connecting gear 144 and the second connecting gear 145 to rotate, thereby causing the first reading element 121 and the second reading element 122 to slide in the slide groove 111b to point to the scale on the scale surface 111a.

[0119] In at least one embodiment of this application, the first reading element 121 is provided with a second rack portion 1211;

[0120] The first connecting gear 144 includes:

[0121] The third meshing part 1441 is meshed with the second rotating gear 142;

[0122] The fourth engagement portion 1442 is coaxially arranged with the third engagement portion 1441. The fourth engagement portion 1442 is engaged with the second rack portion 1211 to push the first reading element 121 to slide in the slide groove 111b.

[0123] In at least one embodiment of this application, the second reading element 122 is provided with a third rack portion 1221;

[0124] The second connecting gear 145 includes:

[0125] The fifth meshing part 1451 is meshed with the second rotating gear 142;

[0126] The sixth engagement part 1452 is coaxially arranged with the fifth engagement part 1451. The sixth engagement part 1452 is engaged with the third rack part 1221 to push the second reading element 122 to slide in the slide groove 111b.

[0127] In at least one embodiment of this application, the first connecting gear 144 and the second connecting gear 145 are respectively located on both sides of the second rotating gear 142;

[0128] The fourth meshing part 1442, the sixth meshing part 1452 and the first meshing part 1411 have the same shape and size.

[0129] In at least one embodiment of this application, a 0 scale line is provided in the middle of the scale surface 111a, and two measurement scale areas 111c are provided at equal intervals from the 0 scale line to both ends, with the first reading element 121 and the second reading element 122 pointing to the two measurement scale areas 111c respectively.

[0130] Example 2:

[0131] Please refer to Figures 1-11 In this embodiment, during measurement, the pushing part 1312 is pushed along the length direction of the measuring end 112. At this time, the pushing part 1312 moves in the guide groove 112b, thereby driving the measuring member 131 to move away from the reading component 120 along the length direction of the measuring end 112 in the movable cavity 112a.

[0132] Since the first rack portion 1311 is engaged with the first meshing portion 1411, the first rack portion 1311 pushes the first meshing portion 1411 to rotate around its axis. The first meshing portion 1411 and the second meshing portion 1412 are coaxially arranged, so that the second meshing portion 1412 rotates synchronously. The second meshing portion 1412 is engaged with the connecting belt 143, so that the connecting belt 143 rotates. Since the connecting belt 143 is engaged with the second rotating gear 142, the rotation of the connecting belt 143 drives the second rotating gear 142 to rotate.

[0133] This causes the second rotating gear 142 to rotate around its axis. Since the third meshing part 1441 and the fifth meshing part 1451 are both meshed with the second rotating gear 142, the rotation of the second rotating gear 142 simultaneously drives the third meshing part 1441 and the fifth meshing part 1451 to rotate. Since the first connecting gear 144 and the second connecting gear 145 are located on both sides of the second rotating gear 142, the rotation of the second rotating gear 142 drives the first connecting gear 144 and the second connecting gear 145 to rotate in opposite directions.

[0134] The first connecting gear 144 engages with the second rack portion 1211 through the fourth meshing portion 1442 to push the first reading element 121 to slide within the slide groove 111b. The second connecting gear 145 engages with the third rack portion 1221 through the sixth meshing portion 1452 to push the second reading element 122 to slide within the slide groove 111b, so that the first reading element 121 and the second reading element 122 slide away from each other. The first reading element 121 and the second reading element 122 move towards the two measuring scale areas 111c away from the 0 scale line, respectively, to measure the distance that the measuring component 130 moves relative to the measuring end 112.

[0135] During the reading process, the surgeon and the first surgical assistant can read the scale indicated by the first reading piece 121 and the second reading piece 122 in the two measurement scale areas 111c respectively, so as to read and verify synchronously, improve the reliability of the final reading result, avoid the measurement result from the surgeon's personal incorrect reading, and thus avoid adverse consequences to the surgery due to inaccurate reading results.

[0136] It should be noted that in this embodiment, initially, both the first reading element 121 and the second reading element 122 are at the 0 mark. During the measurement process, as the measuring component 130 moves, it drives the connecting component 140 to move, causing the first reading element 121 and the second reading element 122 to move away from the 0 mark, thereby measuring the travel distance of the measuring component 130. In other embodiments, the 0 mark can be set at both ends, and the first reading element 121 and the second reading element 122 can be brought close together for measurement.

[0137] It should be further explained that during use, the baffle is attached to the surface of the vertebral body or the grooved area at the resection site, and the position of the baffle is the 0 mark of the measuring end.

[0138] It should be further noted that, in this embodiment, in the initial state, the end of the measuring element 131 away from the reading component 120 is flush with the end face of the measuring end 112.

[0139] It should be further explained that since the fourth meshing part 1442, the sixth meshing part 1452 and the first meshing part 1411 have the same shape and size, when the measuring part 131 moves, the first reading part 121 and the second reading part 122 have the same speed and the same stroke as the measuring part 131, so as to ensure the accuracy of the measurement results and avoid measurement errors caused by different gear modules.

[0140] It should be noted that the slide groove 111b is a rectangular groove, and its length direction is perpendicular to the measuring end 112. The movable cavity 112a is a cylindrical channel. The guide groove 112b is a rectangular through groove, and its length direction is set along the length direction of the measuring end 112. In this embodiment, there are two parallel guide grooves 112b. The slot portion 112c consists of multiple slots, which are equidistantly arranged along the length direction of the measuring end 112.

[0141] The first reading element 121 and the second reading element 122 have the same shape and size. The first reading element 121 consists of a long strip plate with a rack on one side and one end of the other side protruding outward to form a pointer shape with tapered ends.

[0142] The measuring element 131 is generally a rectangular strip, and the meshing teeth of the first rack portion 1311, the second rack portion 1211, and the third rack portion 1221 are the same. The receiving groove 131a is a groove formed by the end face of the measuring element 131 near the measuring assembly 130 being recessed downwards along the length of the measuring end 112, opening on both sides and the top surface. The pushing part 1312 is generally a "U"-shaped structure, with two guide grooves 112b passing through both ends. The abutting end 1321 is generally a rectangular block. The engaging part 1322 is generally a vertical plate at one end, with a locking block structure protruding away from the measuring element 131 at the other end. The elastic element 133 is a spring. The groove 131b is a groove formed by the inward recess of the measuring element 131 near the abutting part 132. The connecting groove 131c is a through groove formed on the side wall of the groove 131b. The guide plate 134 is a trapezoidal convex plate with its small end close to the engaging part 1322. During the process of engaging part 1322 abutting against the guide plate 134, the guide plate 134 can generate a force on engaging part 1322 away from the measuring element 131, so that engaging part 1322 bends in the direction close to the slot 112c and engages in the slot 112c.

[0143] The first rotating gear 141 is a two-stage gear, and the first rotating gear 141 is rotatably connected to the housing 110 via a round shaft.

[0144] The first meshing part 1411 is a gear part, and the second meshing part 1412 is a gear part, both of which are spur gears. Their sizes may be different, but the angular velocities must be the same.

[0145] The second rotating gear 142 is a spur gear and is rotatably connected to the housing 110 via a round shaft.

[0146] The connecting belt 143 is an annular belt with toothed grooves on the inner ring.

[0147] The first connecting gear 144 has the same shape as the first rotating gear 141 and is rotatably connected to the housing 110 via a round shaft.

[0148] The second connecting gear 145 has the same shape as the first rotating gear 141 and is rotatably connected to the housing 110 via a round shaft.

[0149] The first connecting gear 144 and the second connecting gear 145 are arranged in a mirror-symmetric manner with the center of the second rotating gear 142 as the point.

[0150] The third meshing part 1441, the fourth meshing part 1442, the fifth meshing part 1451, and the sixth meshing part 1452 are all spur gears.

[0151] The reading end is equipped with a horizontal measuring part 123. During measurement, the horizontal measuring part 123 is used to level the reading end so that it is in a horizontal state before measurement is performed to ensure measurement accuracy.

[0152] It should be noted that the horizontal measuring part 123 is a horizontal droplet with an external arc surface. When the horizontal droplet is in the center of the arc surface, the reading end is in a horizontal state.

[0153] In at least one embodiment of this application, a slot 112c is provided on the inner wall of the movable cavity 112a;

[0154] The measurement component 130 also includes:

[0155] The abutting member 132 has an abutting end 1321 at one end and an engaging part 1322 at the other end;

[0156] One end of the elastic element 133 abuts against the end of the abutting element 132;

[0157] The measuring element 131 has a groove 131b at one end away from the reading end 111, and the other end of the elastic element 133 abuts against the groove 131b.

[0158] The measuring component 131 has a connecting groove 131c, one end of which is connected to the groove 131b and the other end is connected to the movable cavity 112a;

[0159] One end of the engaging portion 1322 passes through the groove 131b and the communicating groove 131c extends into the movable cavity 112a;

[0160] The outer peripheral surface of the measuring component 131 is provided with a guide plate 134;

[0161] The elastic element 133 abuts against the outside to drive the engaging part 1322 to abut against the guide plate 134, so that the engaging part 1322 deforms and engages with the slot part 112c.

[0162] Please refer to Figures 1-6 In this embodiment, during measurement, the pushing part 1312 is pushed along the length direction of the measuring end 112. At this time, the pushing part 1312 moves in the guide groove 112b, thereby driving the measuring member 131 to move away from the reading component 120 along the length direction of the measuring end 112 in the movable cavity 112a.

[0163] At the same time, it drives the abutment part 132 and the elastic part 133 to move.

[0164] Since the first rack portion 1311 is engaged with the first meshing portion 1411, the first rack portion 1311 pushes the first meshing portion 1411 to rotate around its axis. The first meshing portion 1411 and the second meshing portion 1412 are coaxially arranged, so that the second meshing portion 1412 rotates synchronously. The second meshing portion 1412 is engaged with the connecting belt 143, so that the connecting belt 143 rotates. Since the connecting belt 143 is engaged with the second rotating gear 142, the rotation of the connecting belt 143 drives the second rotating gear 142 to rotate.

[0165] This causes the second rotating gear 142 to rotate around its axis. Since the third meshing part 1441 and the fifth meshing part 1451 are both meshed with the second rotating gear 142, the rotation of the second rotating gear 142 simultaneously drives the third meshing part 1441 and the fifth meshing part 1451 to rotate. Since the first connecting gear 144 and the second connecting gear 145 are located on both sides of the second rotating gear 142, the rotation of the second rotating gear 142 drives the first connecting gear 144 and the second connecting gear 145 to rotate in opposite directions.

[0166] The first connecting gear 144 engages with the second rack portion 1211 through the fourth meshing portion 1442 to push the first reading element 121 to slide within the slide groove 111b. The second connecting gear 145 engages with the third rack portion 1221 through the sixth meshing portion 1452 to push the second reading element 122 to slide within the slide groove 111b, so that the first reading element 121 and the second reading element 122 slide away from each other. The first reading element 121 and the second reading element 122 move towards the two measuring scale areas 111c away from the 0 scale line, respectively, to measure the distance that the measuring component 130 moves relative to the measuring end 112.

[0167] When the abutment end 1321 contacts the cutting surface of the spine, the elastic element 133 is compressed under the action of the abutment force to shorten the distance between the abutment end 1321 and the measuring element 131. At this time, the doctor pushes the push part 1312 to continue moving away from the reading component 120. When the abutment end 1321 contacts the measuring element 131, the locking part 1322 contacts the inclined surface of the guide plate 134, causing the locking part 1322 to deform away from the measuring element 131. The locking part 1322 engages with the slot at the slot 112c to fix the abutment 132, thereby preventing the measuring element 131 from moving further downward. At this time, the chief surgeon and the first surgical assistant take readings through the first reading element 121 and the second reading element 122 to read the distance moved by the measuring component 130 to ensure the accuracy of the movement.

[0168] Because the engaging part 1322 engages with the slot part 112c, the depth of the cut can be measured more accurately, so as to ensure the measurement results more precisely and avoid the problem of limited lifting effect due to insufficient spinal resection, thereby improving the success rate of the surgery.

[0169] Secondly, the measuring ruler used in spinal surgery can also be used in ACDF surgery to measure the resection depth of intervertebral discs and some posterior osteophytes of the vertebral body, so as to achieve precise resection and achieve the best decompression effect.

[0170] The measuring ruler used in spinal surgery can also be used in ACAF surgery to measure the depth of anterior vertebral bone resection, so as to achieve a precise lifting effect.

[0171] The measuring ruler used in spinal surgery can also be applied to ACCF surgery to measure the depth of partial vertebral resection to obtain accurate readings.

[0172] It should be further noted that the measurement methods in ACDF, ACCF, and ACAF can be adapted to the operating environment and circumstances to increase the applicability of the measuring ruler based on spinal surgery, and their operating principles are the same.

[0173] It should be noted that existing measuring tools do not have a locking mechanism. Because of the force applied when using vernier calipers during measurement, the moving parts of the calipers will move further under the action of the force, which will cause a small error. When very precise measurements are required, the measurement results can only be obtained by adjusting little by little or by repeated adjustments.

[0174] In this embodiment, the engagement mechanism triggered by the abutment member 132 is used to lock the abutment member 132 when it comes into contact with the measuring member 131, thereby avoiding the problem of affecting the measurement accuracy due to the presence of force.

[0175] It should be further explained that after the measurement is completed, under the action of the elastic member 133, the abutment end 1321 can be pushed to move away from the measuring member 131, thereby disengaging the engaging part 1322 from the guide plate 134, and disengaging the engaging part 1322 from the slot part 112c.

[0176] In this embodiment, the end of the measuring element 131 away from the reading end 111 is completely housed in the movable cavity 112a, and the distance from the end of the measuring element 131 near the abutment 132 to the abutment end 1321 is equal to the thickness of the abutment end 1321 (i.e., the distance between the end face of the abutment end 1321 near the measuring element 131 and the end face of the abutment end 1321 away from the measuring element 131, with a thickness of a), to ensure measurement accuracy.

[0177] It should be further explained that a baffle is provided at the end of the measuring end 112 furthest from the reading end. During use, the baffle can be pressed against the surface of the element to be measured during surgery (vertebral body, intervertebral space, or vertebral groove), indicating that the measuring end of the ruler is flush with the element being measured, and the ruler's scale is at 0. Therefore, the surgeon does not need to consciously observe whether the ruler is flush with the surface of the element being measured, thus improving measurement efficiency and the accuracy of the results.

[0178] The above description is merely an embodiment of this application. It should be noted that those skilled in the art can make improvements without departing from the inventive concept of this application, but these improvements all fall within the protection scope of this application.

Claims

1. A measuring scale based on spinal surgery, characterized by, The utility model relates to a kind of measuring device, including: Shell, with reading end and measuring end, the reading end has scale face, the scale face is perpendicular to the measuring end; Reading component, be equipped in the reading end, and point to the scale on the scale face; Measuring component, be equipped on the measuring end; Connecting component, two ends are respectively drivingly connected with the reading component and the measuring component; Wherein, the measuring component moves, to drive the reading component moves on the scale face, to indicate the stroke length of the measuring component relative to the measuring end movement; The connecting component includes: First rotating gear, one end is engagedly connected with the measuring component; Second rotating gear, one end is engagedly connected with the reading component; Connecting belt, sleeve is equipped in the first rotating gear and the second rotating gear outside, and is respectively engagedly connected with the first rotating gear and the second rotating gear; The first rotating gear is equipped with first engagement part and coaxially arranged second engagement part with the first engagement part; The measuring component includes: Measuring piece, equipped with first rack part, the first rack part is engagedly connected with the first engagement part; The measuring end is opened with movable cavity, and the measuring piece is movably housed in the movable cavity; The second engagement part is engagedly connected with the connecting belt; Wherein, adjusting the measuring piece, to make the measuring piece extend out of the movable cavity, simultaneously drive the connecting component movement, to drive the reading component moves on the scale face, to indicate the stroke length of the measuring component relative to the measuring end movement; The measuring piece is opened with receiving groove, the first rack part is equipped on the side wall of the receiving groove, the first rotating gear is located in the receiving groove, and the first rotating gear is rotatably connected with the shell; The measuring end is opened with guide slot that is communicated with the movable cavity, and the guide slot and the length direction of the movable cavity are all arranged along the length direction of the measuring end; The measuring piece is equipped with push part, and the push part extends to outside through the movable cavity and the guide slot; One end of the connecting belt is arranged in the receiving groove, and the other end extends to the reading end; The inner wall of the movable cavity is equipped with clamping groove part; The measuring component further includes: Butt joint piece, one end is equipped with butt joint end, and the other end is equipped with clamping part; Elastic piece, one end is butted to the butt joint end; The other end of the measuring piece, away from the reading end, is opened with recess, and the other end of the elastic piece is butted to the recess; The measuring piece is opened with communication groove, and the communication groove is communicated with the recess at one end, and communicated with the movable cavity at the other end; One end of the clamping part extends to the movable cavity through the recess and the communication groove; The outer circumferential surface of the measuring piece is equipped with guide plate; Wherein, the elastic piece is butted to the butt joint end, to drive the clamping part and the guide plate, so that the clamping part and the clamping groove part are clamped.

2. The measurement scale based on spinal surgery according to claim 1, characterized in that, The reading end is opened with sliding slot that is communicated with the movable cavity; The reading component includes: First reading piece, slidingly arranged in the sliding slot; Second reading piece, slidingly arranged in the sliding slot; The connecting component further includes: A first connecting gear is arranged in the sliding groove and engaged with the first reading element and the second rotating gear respectively; A second connecting gear is arranged in the sliding groove and engaged with the second reading element and the second rotating gear respectively; The second rotating gear drives the first connecting gear and the second connecting gear to rotate, so as to drive the first reading element and the second reading element to slide in the sliding groove and point to the scale on the scale surface.

3. The measurement scale based on spinal surgery according to claim 2, characterized in that, The first reading element is provided with a second rack portion; The first connecting gear comprises: A third engaging portion coaxially arranged with the second rotating gear; A fourth engaging portion coaxially arranged with the third engaging portion, the fourth engaging portion is engaged with the second rack portion to drive the first reading element to slide in the sliding groove.

4. The measurement scale based on spinal surgery according to claim 3, characterized in that, The second reading element is provided with a third rack portion; The second connecting gear comprises: A fifth engaging portion coaxially arranged with the second rotating gear; A sixth engaging portion coaxially arranged with the fifth engaging portion, the sixth engaging portion is engaged with the third rack portion to drive the second reading element to slide in the sliding groove.

5. The measurement scale based on spinal surgery according to claim 4, characterized in that, The first connecting gear and the second connecting gear are respectively arranged on the two sides of the second rotating gear; The fourth engaging portion, the sixth engaging portion and the first engaging portion have the same shape and size.

6. The measurement scale based on spinal surgery of claim 2, wherein, A 0 scale line is arranged in the middle of the scale surface, two measurement scale areas are equidistantly arranged from the 0 scale line to both ends, and the first reading element and the second reading element respectively point to the two measurement scale areas; The reading end is provided with a horizontal measurement portion.

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