Spinal Coronal Plane Balance Assessment Device

Abstract

The present invention provides a spinal coronal plane balance assessment device, including a reference rod, two positioning rods and a measurement unit. The measurement unit is used to measure the distance between the reference rod and the spinous process of the C7 vertebra. Since one ends of the two positioning rods are both hinged to the reference rod at the same hinge point and form a positioning angle, and the other ends are both arranged on the back of the human body and respectively correspond to the upper edge points of the two iliac crests, and the reference rod coincides with the angular bisector of the positioning angle, so that the reference rod coincides with the perpendicular bisector of the line connecting the two iliac crest upper edge points of the human body. And the line connecting the two iliac crest upper edge points of the human body is the anterior superior iliac spine connection line. Therefore, the spinal coronal plane balance assessment device of the present invention can always stably measure the distance between the perpendicular bisector of the anterior superior iliac spine connection line and the spinous process of the C7 vertebra, and effectively evaluate the spinal coronal plane balance state through the stable measurement result of the self - contained measurement unit.

Description

Technical Field

[0001] The present invention belongs to the field of medical devices, and particularly relates to a device for evaluating spinal coronal plane balance. Background Art

[0002] Scoliosis, also known as spinal curvature, is a three-dimensional deformity of the spine, including abnormal sequences in the coronal, sagittal, and axial planes.

[0003] Scoliosis deformity specifically refers to the deviation of the spine in the coronal plane. Mild scoliosis can be observed, while severe cases require surgical treatment. Scoliosis deformity is a common disease that harms teenagers and children. The key is to detect and treat it early. With the improvement of surgical techniques, more and more patients with idiopathic scoliosis deformity are treated by posterior pedicle screw fixation, osteotomy, orthopedic bone grafting, and internal fixation. With the development of instruments, the surgical orthopedic effect has gradually improved, but the incidence of scoliosis deformity is still relatively high, and scoliosis deformity will affect the quality of life of patients to a certain extent. In specific practice, spinal coronal plane balance is often used to judge scoliosis deformity. Specifically, when the distance between the mid-perpendicular line of the iliac anterior superior spine connection and the spinous process of the C7 vertebra is greater than 20 mm, it is judged as spinal coronal plane imbalance, that is, scoliosis deformity occurs. Therefore, evaluating the spinal coronal plane balance state can judge whether scoliosis deformity occurs.

[0004] So far, the usage method of existing medical devices applied to evaluate the spinal coronal plane balance state is that a doctor locates the mid-perpendicular line of the iliac anterior superior spine connection by touching the back surface of the person to be evaluated based on experience and uses it as a reference line, and measures the distance between the mid-perpendicular line of the iliac anterior superior spine connection and the spinous process of the C7 vertebra. However, there are the following defects, resulting in a large deviation between the evaluation result and the actual situation: 1. Poor stability. During use, the reference line found often does not coincide with the mid-perpendicular line of the iliac anterior superior spine connection, resulting in the loss of the measurement reference. 2. There is no measurement device on the instrument, so when measuring the distance, indirect measurement of the distance is required, which inevitably causes measurement errors. Summary of the Invention

[0005] The present invention is directed to the above problems, and aims to provide an evaluation device that can effectively evaluate the spinal coronal plane balance state.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] The present invention provides a spinal coronal plane balance evaluation device, which has the following characteristics: including a positioning unit for positioning the upper edge points of the two iliac crests of the human body; a reference rod provided on the positioning unit; and a measurement unit for measuring the distance between the reference rod and the spinous process of the C7 vertebra. Among them, the positioning unit includes two positioning rods. One ends of the two positioning rods are both hinged to the reference rod at the same hinge point, and the other ends are both arranged on the back of the human body and respectively coincide with the upper edge points of the two iliac crests. The included angle formed by the two positioning rods is used as the positioning included angle, and the reference rod coincides with the angular bisector of the positioning included angle, so that the reference rod coincides with the perpendicular bisector of the connection line between the two iliac crest upper edge points of the human body.

[0008] In the spinal coronal plane balance evaluation device provided by the present invention, it may also have the following characteristics: Among them, the positioning unit further includes a moving block and two support rods. The moving block is movably installed on the reference rod, so that it can move along the length direction of the reference rod. The two ends of the support rod are respectively hinged to the positioning rod and the moving block. The hinge point between the positioning rod and the reference rod is used as the first hinge point, the hinge point between the support rod and the positioning rod is used as the second hinge point, and the distance between the first hinge point and the second hinge point is used as the hinge distance. The two hinge distances are the same, so that during the movement of the moving block, the reference rod always coincides with the angular bisector of the positioning included angle.

[0009] In the spinal coronal plane balance evaluation device provided by the present invention, it may also have the following characteristics: Among them, the positioning unit further includes two positioning plate mounting parts and two positioning plates. The positioning plate mounting parts and the positioning plates are both correspondingly arranged with the positioning rods. The positioning plate mounting parts are detachably installed at the other ends of the positioning rods and have a plurality of mounting teeth. The positioning plates have a plurality of positioning holes, and the mounting teeth are inserted and installed in the positioning holes.

[0010] In the spinal coronal plane balance evaluation device provided by the present invention, it may also have the following characteristics: Among them, the plurality of positioning holes are arranged in a matrix.

[0011] In the spinal coronal plane balance evaluation device provided by the present invention, it may also have the following characteristics, and further includes: a fixing unit, including two connecting rods and a fixing component. The two connecting rods are correspondingly installed on the positioning plates, and the fixing component is installed on the two connecting rods. Among them, the fixing component includes a telescopic rod and a spinous process clip. The telescopic rod is vertically installed on the spinous process clip, and the telescopic rod can be telescoped along the vertical direction.

[0012] In the spinal coronal plane balance evaluation device provided by the present invention, it may also have the following characteristics: Among them, the fixing component further includes a universal disc and two connecting blocks. The universal disc is installed at the upper end of the telescopic rod and has an arc-shaped guide rail. The two connecting blocks are correspondingly sleeved outside the two connecting rods.

[0013] The connecting block cooperates with the arc-shaped guide rail and can move in an arc along the arc-shaped guide rail.

[0014] In the spinal coronal plane balance evaluation device provided by the present invention, it may further have the following characteristics: wherein, the measuring unit includes a measuring ruler, the length direction of the measuring ruler is perpendicular to the reference rod, and the reference rod is movably installed thereon, so that it can move along the length direction of the reference rod.

[0015] In the spinal coronal plane balance evaluation device provided by the present invention, it may further have the following characteristics: wherein, the measuring ruler has a scale line part and other parts, the material of the scale line part is a material that cannot be penetrated by X-rays, and the other parts are materials that can be penetrated by X-rays.

[0016] In the spinal coronal plane balance evaluation device provided by the present invention, it may further have the following characteristics: wherein, the "0" of the scale line part is located at a position corresponding to the reference rod.

[0017] Functions and effects of the invention

[0018] According to the spinal coronal plane balance evaluation device involved in the present invention, it includes a reference rod, two positioning rods and a measuring unit. The measuring unit is used to measure the distance between the reference rod and the spinous process of the C7 vertebra. Since one ends of the two positioning rods are both hinged to the reference rod at the same hinge point and form a positioning angle, and the other ends are both arranged on the back of the human body and respectively correspond to the upper edge points of the two iliac crests, and the reference rod coincides with the angular bisector of the positioning angle, so that the reference rod coincides with the perpendicular bisector of the line connecting the two upper edge points of the iliac crests of the human body. And the line connecting the two upper edge points of the iliac crests of the human body is the iliac anterior superior spine connection line. Therefore, the spinal coronal plane balance evaluation device of the present invention can always stably measure the distance between the perpendicular bisector of the iliac anterior superior spine connection line and the spinous process of the C7 vertebra, and effectively evaluate the spinal coronal plane balance state through the stable measurement results of the self-contained measuring unit. Description of the drawings

[0019] Figure 1 is a three-dimensional schematic diagram of the spinal coronal plane balance evaluation device in the embodiment of the present invention Figure 1 ;

[0020] Figure 2 is a three-dimensional schematic diagram of the spinal coronal plane balance evaluation device in the embodiment of the present invention Figure 2 ;

[0021] Figure 3 is a schematic diagram of the positioning unit and the reference rod of the spinal coronal plane balance evaluation device in the embodiment of the present invention;

[0022] Figure 4 is a connection schematic diagram of the positioning rod and the positioning plate mounting member of the spinal coronal plane balance evaluation device in the embodiment of the present invention;

[0023] Figure 5 It is a schematic connection diagram of the positioning plate mounting member and the positioning plate of the spinal coronal plane balance evaluation device in the embodiment of the present invention;

[0024] Figure 6 It is a schematic diagram of the positioning plate of the spinal coronal plane balance evaluation device in the embodiment of the present invention;

[0025] Figure 7 It is a schematic installation diagram of the connecting rod and the positioning plate of the spinal coronal plane balance evaluation device in the embodiment of the present invention;

[0026] Figure 8 It is a schematic installation diagram of the fixing component of the spinal coronal plane balance evaluation device in the embodiment of the present invention;

[0027] Figure 9 It is a schematic connection diagram of the universal disc, the connecting block and the positioning plate of the spinal coronal plane balance evaluation device in the embodiment of the present invention;

[0028] Figure 10 It is a schematic installation diagram of the measuring unit and the reference rod in the embodiment of the present invention;

[0029] Figure 11 It is a schematic installation diagram of the fixing component of the spinal coronal plane balance evaluation device in the embodiment of the present invention;

[0030] Figure 12 It is a schematic positioning diagram of the positioning plate of the spinal coronal plane balance evaluation device in the embodiment of the present invention;

[0031] Figure 13 It is a top view schematic diagram of the installation process of the spinal coronal plane balance evaluation device in the embodiment of the present invention;

[0032] Figure 14 It is a three-dimensional schematic diagram of the installation process of the spinal coronal plane balance evaluation device in the embodiment of the present invention;

[0033] Figure 15 It is a side view schematic of the measurement process of the spinal coronal plane balance evaluation device in the embodiment of the present invention Figure 1 ; and

[0034] Figure 16 It is a side view schematic of the measurement process of the spinal coronal plane balance evaluation device in the embodiment of the present invention Figure 2 . Detailed implementation manners

[0035] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the following embodiments will specifically describe the spinal coronal plane balance evaluation device of the present invention in conjunction with the accompanying drawings.

[0036] Figure 1 is a three-dimensional schematic diagram of the spinal coronal plane balance evaluation device in the embodiment of the present invention Figure 1 , Figure 2 is a three-dimensional schematic diagram of the spinal coronal plane balance evaluation device in the embodiment of the present invention Figure 2 .

[0037] As Figure 1 and Figure 2 shown, the spinal coronal plane balance evaluation device 100 in this embodiment is used to measure the distance between the mid-perpendicular of the line connecting the upper edge points of the two iliac crests of the human body and the spinous process of the C7 vertebra, and includes a positioning unit 10, a reference rod 20, a fixing unit 30, and a measuring unit 40.

[0038] Figure 3 is a schematic diagram of the positioning unit and the reference rod of the spinal coronal plane balance evaluation device in the embodiment of the present invention.

[0039] As Figures 1 - 3 shown, the positioning unit 10 is used to position the upper edge points of the two iliac crests of the human body, and includes a moving block 11, two support rods 12, two positioning rods 13, two positioning plate mounting members 14, and two positioning plates 15.

[0040] The two positioning rods 13 have the same length, are respectively located on both sides of the reference rod 20 and one end of each is hinged to the reference rod 20 at the same hinge point, and the other end of each is arranged on the back of the human body and corresponds to the upper edge points of the two iliac crests respectively. The included angle formed by the two positioning rods 13 is used as the positioning angle, and the reference rod 20 coincides with the angle bisector of the positioning angle. Based on the principle of the three lines in one of an isosceles triangle, the reference rod 20 coincides with the mid-perpendicular of the line connecting the upper edge points of the two iliac crests of the human body, that is, coincides with the mid-perpendicular of the line connecting the anterior superior iliac spines. In this embodiment, the two positioning rods 13 are both located in the first plane P, and the reference rod 20 is parallel to the first plane P.

[0041] The moving block 11 is movably mounted on the reference rod 20, specifically sleeved on the reference rod 20 and can move along the length direction of the reference rod 20. In this embodiment, the moving block 11 is in an "L" shape, the height direction of the moving block 11 is perpendicular to the reference rod 20, and the volumes of the moving block 11 on the left and right sides of the reference rod 20 are equal.

[0042] Both ends of the two support rods 12 are respectively hinged to the positioning rod 13 and the moving block 11. The hinge point between the positioning rod 13 and the reference rod 20 is taken as the first hinge point I1, the hinge point between the support rod 12 and the positioning rod 13 is taken as the second hinge point I2, and the distance between the first hinge point I1 and the second hinge point I2 is taken as the hinge distance. The two hinge distances are the same. Thus, during the movement of the moving block 11, the other ends of the two positioning rods 13, that is, the free ends of the positioning rod 13, can be unfolded or folded together, and the angle bisector of the angle between the reference rod 20 and the positioning angle always coincides. In this embodiment, the two support rods 12 are both located on the first plane P, and the perpendicular distances from the two hinge points of the two support rods 12 on the moving block 11 to the reference rod 20 are the same. When the moving block 11 moves to the right along the length direction of the reference rod 20 (such as Figure 3 the direction A shown), the other ends of the two positioning rods 13 are unfolded (such as Figure 3 the directions B and C shown), when the moving block 11 moves to the left along the length direction of the reference rod 20 (such as Figure 3 the opposite direction of the direction A shown), the other ends of the two positioning rods 13 are folded together (such as Figure 3 the opposite directions of the directions B and C shown).

[0043] Figure 4 is a connection schematic diagram of the positioning rod and the positioning plate mounting member of the spinal coronal plane balance evaluation device in the embodiment of the present invention.

[0044] The two positioning plate mounting members 14 are respectively arranged at the other ends of the two positioning rods 13, that is, mounted on the free ends of the positioning rod 13.

[0045] The positioning plate mounting member 14 is detachably mounted at the other end of the positioning rod 13. One end face of the positioning plate mounting member 14 away from the positioning rod 13 has a plurality of mounting teeth 141. In this embodiment, the plane of one end face of the positioning plate mounting member 14 away from the positioning rod 13 is parallel to the first plane P and is a circular plane. The connection line between the center of the circular plane and the other end of the positioning rod 13 is perpendicular to the circular plane. The connection point between the positioning rod 13 and the positioning plate mounting member 14 corresponds to the center of the circular plane. The positioning plate mounting member 14 is mounted on the positioning rod 13 through a rotating bearing, so that the end face with the mounting teeth 141 can rotate around the center of the end face.

[0046] A plurality of mounting teeth 141 are vertically mounted on the end face of the positioning plate mounting member 14 and are evenly distributed. In this embodiment, the number of mounting teeth 141 is 4, and they are evenly arranged at the edge of the end face along the circumferential direction of the end face of the positioning plate mounting member 14. The mounting teeth 141 are divided into a tooth root portion 1411 and a tooth tip portion 1412 along the height direction from the fixed end to the free end of the mounting teeth 141. The tooth tip portion 1412 is two wedge-shaped elastic pieces extending in the length direction of the mounting teeth 141. The elastic deformation direction is towards the axis of the end face of the positioning plate mounting member 14, and the elastic recovery direction is the opposite of the elastic deformation direction. At the junction of the tooth tip portion 1412 and the tooth root portion 1411, a locking groove 1413 is provided on the surface of the tooth tip portion 1412 facing the outside of the positioning plate mounting member 14. The locking groove 1413 is a straight groove perpendicular to the length direction of the mounting teeth 141.

[0047] Figure 5 It is a schematic connection diagram of the positioning plate mounting member and the positioning plate of the spinal coronal plane balance evaluation device in the embodiment of the present invention. Figure 6 It is a schematic diagram of the positioning plate of the spinal coronal plane balance evaluation device in the embodiment of the present invention.

[0048] Both positioning plates 15 are correspondingly arranged with the positioning plate mounting member 14 and the positioning rod 13, and have a plurality of positioning holes 151. In this embodiment, the positioning plate 15 is made of a material that is not penetrable by X-rays. The positioning plate 15 is detachably mounted on the positioning plate mounting member 14, and the thickness of the positioning plate 15 is matched with the locking groove 1413 of the tooth tip portion 1412.

[0049] A plurality of positioning holes 151 are all through holes and are arranged in a matrix. The mounting teeth 141 are inserted and mounted in the positioning holes 151. In this embodiment, the positioning holes 151 are square through holes, and the number is 289, forming a square matrix of 17 rows and 17 columns. Near two adjacent sides of the square matrix, there are positioning marks for rows and columns (such as Figure 6 shown as "A" to "K" and "1" to "9"), and the marks are formed by hollowing out on the positioning plate 15.

[0050] The length or width of the positioning hole 151 matches the width of the elastic sheet of the tooth tip 1412, and the installation tooth 141 can be inserted and installed in the positioning hole 151 through the elastic sheet. In this embodiment, the specific installation process is to apply external force to the installation tooth 141, gather the four installation teeth 141 to make the four installation teeth 141 elastically deform, and make the elastic sheet begin to enter the positioning hole 151, and then remove the external force, and continue to push the positioning plate mounting member 14 toward the positioning plate 15 along the thickness direction of the positioning plate 15 until the positioning plate 15 slides into the locking groove 1413 of the tooth tip 1412, and the locking groove 1413 fixes the positioning plate 15 on the positioning plate mounting member 14. If an external force is applied to the four installation teeth 141 at this time, the four installation teeth 141 are gathered to make the four installation teeth 141 elastically deform, and the positioning plate 15 can be removed from the positioning plate mounting member 14.

[0051] The reference rod 20 is disposed on the positioning unit 10 . In this embodiment, the reference rod 20 is a rigid and slender rod.

[0052] Figure 7 is a schematic diagram of a fixing assembly of a spinal coronal plane balance assessment device in an embodiment of the present invention, Figure 8 is a schematic diagram of the installation of a fixing assembly of a spinal coronal plane balance assessment device in an embodiment of the present invention, Figure 9 It is a connection diagram of a universal disk, a connection block and a positioning plate of a spinal coronal plane balance assessment device in an embodiment of the present invention.

[0053] like Figure 1 , Figure 2 as well as Figures 7 - 9 As shown, the fixing unit 30 includes two connecting rods 31 and a fixing assembly 32 .

[0054] The two connecting rods 31 are correspondingly mounted on the positioning plate 15. In this embodiment, one end of the connecting rod 31 is rotatably mounted on the positioning plate 15 through the first butterfly screw L2 and the connecting clamp L1, so that the positioning plate 15 can rotate with the first butterfly screw L2 as the rotation center and can be fixed by the first butterfly screw L2. The connecting clamp L1 is sleeved on the connecting rod 31, so that the connecting clamp L1 can move along the length direction of the connecting rod 31 and be fixed by the second butterfly screw L3.

[0055] The fixing assembly 32 is installed on the other end of the two connecting rods 31 , and includes a telescopic rod 321 , a spinous process clamp 322 , a universal disk 323 and a connecting block 324 .

[0056] The number of connecting blocks 324 is two, which are arranged corresponding to the connecting rod 31 and sleeved outside the connecting rod 31, so that they can move along the length direction of the connecting rod 31. In this embodiment, the connecting block 324 can move along the length direction of the connecting rod 31 and is fixed by the third butterfly screw L4.

[0057] An arc-shaped guide rail 3231 is provided on the universal disc 323. The connecting block 324 is matched with the arc-shaped guide rail 3231 and can move in an arc along the length direction of the arc-shaped guide rail. In this embodiment, the arc-shaped guide rail 3231 is a hollow arc. One end of the connecting block 324 is in a rod shape (not marked in the drawing) that matches the arc-shaped guide rail 3231. The rod-shaped end is passed through the arc-shaped guide rail 3231, and a limiting member larger than the hollow area is installed at the protruding rod-shaped end for limiting, so that the connecting block 324 can move in an arc along the length direction of the arc-shaped guide rail 3231.

[0058] The upper end of the telescopic rod 321 is vertically installed on the lower end surface of the universal disc 323 and can be telescoped in the vertical direction. In this embodiment, the telescopic rod 321 is a two-stage nested telescopic rod.

[0059] The spinous process clip 322 is installed at the lower end of the telescopic rod 321 and has an opening rod 322A, clamping arms 322B and a fourth butterfly screw L5. The telescopic rod 321 can adjust the vertical distance from the positioning plate 15 to the spinous process clip 322. In this embodiment, the two clamping arms 322B of the spinous process clip 322 are connected to the opening rod 322A through a link structure. The opening rod 322A and the fourth butterfly screw L5 form a lead screw-nut mechanism. When the fourth butterfly screw L5 rotates in the clockwise direction (such as Figure 7 direction D), it will drive the opening rod 322A to move in the vertically downward direction (such as Figure 7 direction E), so that the two clamping arms 322B open. When the fourth butterfly screw L5 rotates in the counterclockwise direction (such as Figure 7 the opposite direction of direction D), it will drive the opening rod 322A to move in the vertically upward direction (such as Figure 7 the opposite direction of direction E), so that the two clamping arms 322B clamp.

[0060] Figure 10 It is a schematic installation diagram of the measuring unit and the reference rod in the embodiment of the present invention.

[0061] As Figure 10 shown, the measuring unit 40 is used to measure the distance between the reference rod 20 and the spinous process of the C7 vertebra and includes a measuring ruler 41.

[0062] The length direction of the measuring ruler 41 is perpendicular to the reference rod 20 and is movably mounted on the reference rod 20 so as to be able to move along the length direction of the reference rod 20. It has a scale line part 411 and other parts 412. In this embodiment, the measuring ruler 41 is movably mounted on the reference rod 20 by a saddle clip, and the reference rod 20 is located in the middle of the measuring ruler 41. The material of the saddle clip is an X-ray penetrable material.

[0063] The material of the scale line part 411 is an X-ray non-permeable material. In this embodiment, the scale line part 411 is scale lines evenly distributed along the length direction of the measuring ruler 41, and the "0" of the scale line part is located at the position corresponding to the reference rod 20.

[0064] The other parts 412 are X-ray penetrable materials. In this embodiment, the other parts 412 are the parts of the measuring ruler 41 other than the scale line part 411.

[0065] The working process of the spinal coronal plane balance evaluation device 100 in this embodiment includes an installation process and a measurement process:

[0066] Figure 11 It is a schematic installation diagram of the fixing component of the spinal coronal plane balance evaluation device in the embodiment of the present invention; Figure 12 It is a schematic positioning diagram of the positioning plate of the spinal coronal plane balance evaluation device in the embodiment of the present invention; Figure 13 It is a schematic top view of the installation process of the spinal coronal plane balance evaluation device in the embodiment of the present invention; Figure 14 It is a schematic three-dimensional diagram of the installation process of the spinal coronal plane balance evaluation device in the embodiment of the present invention.

[0067] The following combines Figures 11 - 14 to describe the installation process of the spinal coronal plane balance evaluation device 100 in this embodiment:

[0068] First, the person to be evaluated lies prone, and any spine of the person to be evaluated is exposed through a surgical incision as the fixed spine F. The spinous process of the fixed spine F is used as the fixed spinous process F1. The spinous process clip 322 is used to clamp the fixed spinous process F1, so that the telescopic rod 321 is vertically arranged, and the length of the telescopic rod 321 is adjusted so that the connecting block 324 is at the height corresponding to the back of the person to be evaluated. Then, one end of each of the two connecting rods 31 is respectively inserted into the connecting block 324, and positioning plates 15 are installed at the other ends of the two connecting rods 31. The position of the positioning plates 15 is adjusted for the first time so that the two positioning plates 15 are directly above the positions on the back corresponding to the two iliac crests of the person to be evaluated and are parallel to the back. After completion, the connecting block 324 and the connecting clip L1 are fixed on the connecting rod 31 through the second butterfly screw L3 and the third butterfly screw L4, and the position of the connecting block 324 in the arc-shaped guide rail 3231 is fixed. Then, the X-ray machine is used to directly irradiate the plate surface of the positioning plate 15 vertically. The X-ray penetrates the positioning holes 151 and the marked places on the positioning plate 15, and the X-ray fluoroscopy image is observed. The positioning holes 151 and the marked places on the positioning plate 15 can be fluoroscoped, and the rest shows as a shadow. The position of the positioning plate is adjusted for the second time so that in the fluoroscopy image, the upper edge points of the two iliac crests are respectively located in the shadows at the centers of the 2×2 matrix composed of 4 positioning holes 151, and the center of this matrix is used as the upper edge positioning point of the iliac crest. As Figure 12 The upper edge points of the iliac crest shown are located in the column marked "D" and the row interval of the positioning hole 151 marked "4". After completion, the positioning plate 15 is fixed on the connecting clip L1 through the first butterfly screw L2. Finally, the installation tooth 1 is inserted into the positioning hole 151, and the positioning plate installation part 14 is fixedly installed on the positioning plate 15 through the locking groove at the tooth tip part 1412, and the upper edge positioning point of the iliac crest corresponds to the center of the end face of the positioning plate installation part 14 close to the back.

[0069] Figure 15 is a side view schematic of the measurement process of the spinal coronal plane balance evaluation device in the embodiment of the present invention Figure 1 ; Figure 16 is a side view schematic of the measurement process of the spinal coronal plane balance evaluation device in the embodiment of the present invention Figure 2 。

[0070] The following Figures 15 - 16 is used to illustrate the measurement process of the spinal coronal plane balance evaluation device 100 in this embodiment:

[0071] First, the measuring ruler 41 is mounted on the reference rod 20, and is slid along the length direction of the reference rod 20 to the position directly above the C7 spinous process of the person being assessed. Then, an X-ray machine is used to vertically and directly measure the surface of the ruler 41. The X-ray passes through the scale line portion 411, and the X-ray fluoroscopic image is observed. The scale line portion 411 is displayed as a shadow, and the other portions 412 can be fluoroscopically viewed. In the fluoroscopic image: the length from the C7 spinous process to the scale "0" is read from the measuring ruler 41, that is, the distance from the C7 spinous process to the reference rod 20. If the distance is greater than the predetermined distance, the person being assessed is judged to have scoliosis. Otherwise, the person being assessed is judged to have no scoliosis. In this embodiment, the predetermined distance is 20 mm.

[0072] Functions and Effects of the Embodiments

[0073] The spinal coronal plane balance assessment device involved in this embodiment includes a reference rod, two positioning rods and a measuring unit. The measuring unit is used to measure the distance between the reference rod and the spinous process of the C7 vertebra. Because one end of the two positioning rods are hinged to the reference rod at the same hinge point and form a positioning angle, the other ends are arranged on the back of the human body and correspond to the two upper edge points of the iliac spine respectively, and the reference rod coincides with the angular bisector of the positioning angle, so that the reference rod coincides with the perpendicular bisector of the line connecting the two upper edge points of the iliac spine of the human body, and the line connecting the two upper edge points of the iliac spine of the human body is the line connecting the anterior superior iliac spines. Therefore, the spinal coronal plane balance assessment device of this embodiment can always stably measure the distance between the perpendicular bisector of the line connecting the anterior superior iliac spines and the spinous process of the C7 vertebra, and effectively evaluate the spinal coronal plane balance state through the stable measurement results of the built-in measuring unit.

[0074] Because the positioning unit in this embodiment also includes a moving block and two support rods, the two ends of the support rods are hinged to the moving block and the positioning rod respectively, and the distances from the hinge points of the support rods and the positioning rods to the hinge points of the positioning rods and the reference rods are the same. Therefore, during the movement of the moving block, the bisector of the reference rod and the positioning angle always coincides, so that the reference rod always coincides with the perpendicular bisector of the line connecting the anterior superior iliac spines.

[0075] Because the positioning unit of this embodiment also includes a positioning plate mounting component and a positioning plate, the positioning plate has a plurality of mounting teeth, and the mounting teeth are inserted and installed in the positioning holes. Therefore, the positioning plate mounting component can fix the positioning plate at different positions on the positioning plate, so that the center of the end face of the positioning plate mounting component can be quickly aligned with the upper edge point of the iliac spine.

[0076] Because the positioning plate of this embodiment is made of an X-ray-impenetrable material and the multiple positioning holes are arranged in a matrix, when the X-ray is directly irradiated on the positioning plate, the X-ray image forming area is a matrix composed of multiple small areas, which makes it easier to locate the upper edge point of the iliac spine.

[0077] Since this embodiment further includes a fixing unit, the fixing unit includes a connecting rod and a fixing component. The connecting rod is installed on the positioning plate, and the fixing component includes a telescopic rod and a spinous process clip. The telescopic rod is vertically installed on the spinous process clip and can be telescoped in the vertical direction. Therefore, the vertical distance from the positioning plate to the connecting block can be adjusted, so that the positioning plate can be conveniently set on the back of the evaluated person.

[0078] Since the fixing component of this embodiment further includes a universal disc and two connecting blocks, the universal disc has an arc-shaped guide rail, and the connecting blocks are matched with the arc-shaped guide rail and can move in an arc along the arc-shaped guide rail. Therefore, when the relative position of the connecting rod changes, the connecting blocks can flexibly change their positions accordingly. Thus, when the fixing component is fixed, the positioning unit can be flexibly adjusted to position the upper edge point of the iliac crest of the evaluated person.

[0079] Since the measuring ruler in this embodiment has a scale line part and other parts, the material of the scale line part is a material that cannot be penetrated by X-rays, and the other parts are materials that can be penetrated by X-rays. Therefore, when X-rays directly irradiate the measuring ruler, the scale line part appears as shadow scale lines in the fluoroscopic image, so that the distance between the perpendicular bisector of the anterior superior iliac spine connection line and the spinous process of the C7 vertebra can be conveniently measured and read.

[0080] The above embodiments are preferred cases of the present invention and are not used to limit the protection scope of the present invention. Various deformations or modifications that can be made by those of ordinary skill in the art without creative labor within the scope of the appended claims still fall within the protection scope of this patent.

Claims

1. A spinal coronal plane balance assessment device for measuring the distance between the mid-perpendicular of the line connecting the upper edge points of the two iliac crests of a human body and the spinous process of the C7 vertebra. Characterized in that: It includes: A positioning unit for positioning the upper edge points of the two iliac crests of the human body; A reference rod provided on the positioning unit; A measuring unit for measuring the distance between the reference rod and the spinous process of the C7 vertebra; And A fixing unit, including two connecting rods and a fixing component, Wherein, the positioning unit includes two positioning rods, One ends of the two positioning rods are both hinged to the reference rod at the same hinge point, and the other ends are both arranged on the back of the human body and respectively correspond to the upper edge points of the two iliac crests. Taking the included angle formed by the two positioning rods as the positioning included angle, and the reference rod coincides with the angular bisector of the positioning included angle, so that the reference rod coincides with the mid-perpendicular of the line connecting the upper edge points of the two iliac crests of the human body. The positioning unit further includes a moving block and two support rods. The moving block is movably installed on the reference rod and can move along the length direction of the reference rod. The two ends of the support rod are respectively hinged to the positioning rod and the moving block. Taking the hinge point of the positioning rod and the reference rod as the first hinge point, taking the hinge point of the support rod and the positioning rod as the second hinge point, and taking the distance between the first hinge point and the second hinge point as the hinge distance. The two hinge distances are the same. Thus, during the movement of the moving block, the reference rod always coincides with the angular bisector of the positioning included angle. The positioning unit further includes two positioning plate mounting parts and two positioning plates. The positioning plate mounting parts and the positioning plates are both arranged corresponding to the positioning rods. The positioning plate mounting parts are detachably installed at the other ends of the positioning rods and have a plurality of mounting teeth. The positioning plates have a plurality of positioning holes, and the mounting teeth are inserted and installed in the positioning holes. The two connecting rods are correspondingly installed on the positioning plates, and the fixing component is installed on the two connecting rods. Wherein, the fixing component includes a telescopic rod and a spinous process clip. The telescopic rod is vertically installed on the spinous process clip, and the telescopic rod can be telescoped along the vertical direction. The fixing component further includes a universal disc and two connecting blocks. The universal disc is installed at the upper end of the telescopic rod and has an arc-shaped guide rail. The two connecting blocks are correspondingly sleeved outside the two connecting rods, and the connecting blocks are matched with the arc-shaped guide rail and can move in an arc along the arc-shaped guide rail. The measuring unit includes a measuring ruler. The length direction of the measuring ruler is perpendicular to the reference rod and is movably installed on the reference rod, so that it can move along the length direction of the reference rod. The measuring ruler has a scale line part and other parts. The material of the scale line part is a material that cannot be penetrated by X-rays, and the other parts are materials that can be penetrated by X-rays.

2. The spinal coronal plane balance assessment device according to claim 1, characterized in that: Wherein, The plurality of positioning holes are arranged in a matrix.

3. The spinal coronal plane balance assessment device according to claim 1, characterized in that: Among them, the "0" of the scale line part is located at the position corresponding to the reference rod.

Images