Tool for measuring angle of fixed bent rod in spine

Abstract

The utility model relates to an angle measuring tool for a fixed bent rod in a spinal column, which comprises a cylindrical metal rod, a first metal sleeve is fixed at one end of the cylindrical metal rod, a titanium rod is inserted into one side of the top of the first metal sleeve, a metal ring is sleeved at one end of the titanium rod far away from the first metal sleeve, a pointer is fixed on one side of the metal ring, and the pointer is fixed on the other side of the metal ring. The other end of the cylindrical metal rod is sleeved with a second metal sleeve, a supporting column is fixed to the second metal sleeve, a fan-shaped measuring disc used in cooperation with the pointer is fixed to the bottom of the front face of the supporting column, and the bottom of the fan-shaped measuring disc is fixed to the second metal sleeve. The angle formed by the titanium rod can be contrasted on the fan-shaped measuring disc, the operation is simple and easy, a user can conveniently measure the bending angle of the titanium rod in real time in the operation, the situation that the bending angle is not clear through experience is avoided, and accurate control over the bending angle of the titanium rod in the spine screw-rod internal fixation operation is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of clinical medicine, in particular to a tool for measuring the angle of a spinal internal fixation bending rod. Background Art

[0002] Clinical medicine is a science that studies the etiology, diagnosis, treatment, and prognosis of diseases, improves clinical treatment levels, and promotes human health. Against the backdrop of rapid development of modern industries such as transportation and construction, the incidence of spinal fractures has shown an increasing trend year by year. Pedicle screw-rod technology is widely used in clinical treatment. Due to the elasticity and plasticity of the connecting rod itself, the pre-bending angle of the connecting rod is one of the key points for maintaining vertebral height during intraoperative reduction and postoperative follow-up.

[0003] Currently, titanium rods are mostly used in spinal screw and rod internal fixation surgeries, and the pre-bending of titanium rods is mostly done by manual experience-based bending or fixed-angle shaped titanium rods for reduction and support. There are problems such as unclear empirical bending angles, inability to accurately measure angles during surgery, and limited application scenarios for fixed-angle shaped titanium rods. There is a lack of existing angle measurement methods, and most of the bending angles are measured by referring to postoperative imaging films, and real-time measurement and adjustment during surgery are impossible. Utility Model Content

[0004] The purpose of the utility model is to solve the problems in the existing technology, such as unclear empirical bending rod angle, inability to accurately measure angle during surgery, and limited application scenarios of fixed-angle shaping titanium rods. The existing angle measurement methods are lacking, and most of them are measured by referring to imaging films after surgery, and real-time measurement and adjustment during surgery are impossible. Therefore, a spinal internal fixation bending rod angle measurement tool is proposed.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A spinal internal fixation bending rod angle measuring tool includes a cylindrical metal rod, one end of which is fixed with a first metal sleeve, one side of the top of the first metal sleeve is inserted with a titanium rod, the end of the titanium rod away from the first metal sleeve is sleeved with a metal ring, one side of the metal ring is fixed with a pointer, the other end of the cylindrical metal rod is sleeved with a second metal sleeve, a support column is fixed on the second metal sleeve, the bottom of the front of the support column is fixed with a sector-shaped measuring disk used in conjunction with the pointer, and the bottom of the sector-shaped measuring disk is fixed on the second metal sleeve, and multiple groups of angle marks used in conjunction with the pointer are evenly arranged on the sector-shaped measuring disk.

[0007] Preferably, a through hole is provided at the top of the front side of the first metal sleeve, a locking nut is embedded in the front side of the inner cavity of the through hole, and the internal thread of the locking nut is connected to a locking bolt with one end attached to the titanium rod.

[0008] Preferably, the intervals between the angle marks on the sector-shaped measuring disk are 5 degrees.

[0009] Preferably, the titanium rod has an overall arc-shaped structure.

[0010] Preferably, the lengths of the cylindrical metal rod and the support column are the same.

[0011] Preferably, two sets of inclined plates are symmetrically fixed along the up-down direction to one end of the locking bolt away from the titanium rod.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] The spinal internal fixation bending rod angle measuring tool can quickly fix one end of the titanium rod by setting a first metal sleeve and cooperating with a locking bolt and a locking nut, so as to accurately detect the curvature of the titanium rod. The design of the metal ring can quickly position the pointer at the end of the titanium rod away from the first metal sleeve, and the design of the second metal sleeve can quickly insert the support column and the fan-shaped measuring disk on the cylindrical metal rod, so as to bring the fan-shaped measuring disk close to the angle formed by the pointer. The measured angle is the angle of the titanium rod according to the arc angle measurement theory. The combined method is used to compare the angle formed by the titanium rod on the fan-shaped measuring disk, and the operation is simple and easy, which is convenient for the user to measure the bending angle of the titanium rod in real time during the operation, avoid the unclear experience of the bending rod angle, and realize the precise control of the bending angle of the titanium rod in the spinal screw rod internal fixation operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of the spinal internal fixation bending rod angle measurement tool proposed by the present invention;

[0015] Figure 2 This is a partial cross-sectional view of the structure of the spinal internal fixation bending rod angle measurement tool proposed by the present invention;

[0016] Figure 3 This is a partial three-dimensional diagram of the structure of the spinal internal fixation bending rod angle measurement tool proposed by the utility model;

[0017] Figure 4 This is a planar schematic diagram of the simulated target vertebral body and its upper and lower vertebral bodies, pedicle screws and titanium rods of the utility model.

[0018] In the figure: 1. Cylindrical metal rod; 2. First metal sleeve; 3. Titanium rod; 4. Through hole; 5. Locking nut; 6. Locking bolt; 7. Metal ring; 8. Pointer; 9. Second metal sleeve; 10. Support column; 11. Sector-shaped measuring disk. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] Example

[0021] Reference Figure 1 and Figure 2 When the tool is fixed with the nut 5, the end of the tool is tightened, and the tool is tightened with the screw thread 5, so that the tool 1 can be tightened easily.

[0022] Reference Figure 1-4 The other end of the cylindrical metal rod 1 is sleeved with a second metal sleeve 9, and a support column 10 is fixed on the second metal sleeve 9. The bottom of the front of the support column 10 is fixed with a sector-shaped measuring disk 11 used in conjunction with the pointer 8, and the bottom of the sector-shaped measuring disk 11 is fixed on the second metal sleeve 9. The length of the cylindrical metal rod 1 and the support column 10 is the same. The design of the same length value can further expand the measuring range and improve the measuring accuracy. A plurality of groups of angle marks used in conjunction with the pointer 8 are evenly arranged on the sector-shaped measuring disk 11, and as shown in FIG. Figure 4As shown, A and B are the intersection points of the pedicle screw and the titanium rod 3, AD and BE are tangents passing through the fixed points A and B on the arc respectively, the center of the circle where the AB arc is located is O, the diameter is R, AO and BO are the extension lines of the pedicle screw axis, FC is parallel to AO, GC is parallel to BO, since the pedicle screw is theoretically perpendicular to the AB arc, the two pedicle screws must intersect at O, according to the principle that the sum of the internal angles of the four sides is 360°, the bending angle = angle ADE = angle AOB = angle FCG = the cobb angle of the fixed segment, so from mathematical geometry it can be inferred that the bending angle of the rod and the cobb angle of the fixed segment are: The numerical values ​​are equivalent. The angle formed by the sector-shaped measuring disk 11 close to the pointer 8, and the measured angle is the angle of the titanium rod 3 according to the arc angle measurement theory. The above-mentioned combined method can compare the angle formed by the titanium rod 3 on the sector-shaped measuring disk 11, and it is simple and easy to operate, which is convenient for the user to measure the bending angle of the titanium rod 3 in real time during the operation, avoid the unclear experience of the bending rod angle, and realize the precise control of the bending angle of the titanium rod 3 in the spinal screw rod internal fixation surgery. The angle marks on the sector-shaped measuring disk 11 are spaced at 5 degrees. The design of 5 degrees at intervals improves the measurement accuracy and greatly reduces the measurement error.

[0023] In the present invention, the user inserts one end of the titanium rod 3 into the first metal sleeve 2 and rotates the locking bolt 6. At this time, the locking bolt 6 and the locking nut 5 are connected by thread. The locking bolt 6 can rotate and move in the locking nut 5 until it contacts one end of the titanium rod 3 and uses the extrusion force to quickly fix one end of the titanium rod 3 in the first metal sleeve 2. Then the user puts the metal ring 7 on the other end of the titanium rod 3. At this time, the pointer 8 is in a downward swing state. Then the user puts the second metal sleeve 9 on the cylindrical metal rod 1 away from the first metal sleeve. 2, so that the support column 10 and the sector-shaped measuring disk 11 can be quickly inserted into the cylindrical metal rod 1. At this time, the sector-shaped measuring disk 11 is placed close to the angle formed by the pointer 8. The measured angle is the angle of the titanium rod 3 according to the arc angle measurement theory. The combined method can compare the angle formed by the titanium rod 3 on the sector-shaped measuring disk 11, and it is simple and easy to operate, which is convenient for the user to measure the bending angle of the titanium rod 3 in real time during the operation, avoid the unclear experience of the bending rod angle, and realize the precise control of the bending angle of the titanium rod 3 in the spinal screw rod internal fixation operation.

[0024] The above are only preferred specific implementation methods of the present invention, but the protection scope of the present invention is not limited to them. Any technician familiar with the technical field can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention within the technical scope disclosed by the present invention, and they should be covered by the protection scope of the present invention.

Claims

1. A spinal fixation bending rod angle measuring tool, comprising a cylindrical metal rod (1), characterized in that: A first metal sleeve (2) is fixed to one end of the cylindrical metal rod (1), a titanium rod (3) is inserted on one side of the top of the first metal sleeve (2), a metal ring (7) is sleeved on one end of the titanium rod (3) away from the first metal sleeve (2), a pointer (8) is fixed on one side of the metal ring (7), and a second metal sleeve (9) is sleeved on the other end of the cylindrical metal rod (1), a support column (10) is fixed on the second metal sleeve (9), a sector-shaped measuring disk (11) used in conjunction with the pointer (8) is fixed on the bottom of the front of the support column (10), and the bottom of the sector-shaped measuring disk (11) is fixed on the second metal sleeve (9), and a plurality of groups of angle marks used in conjunction with the pointer (8) are evenly arranged on the sector-shaped measuring disk (11).

2. The spinal internal fixation bending rod angle measurement tool according to claim 1, characterized in that: A through hole (4) is provided at the top of the front face of the first metal sleeve (2), a locking nut (5) is embedded in the front face of the inner cavity of the through hole (4), and the locking nut (5) is internally threadedly connected to a locking bolt (6) with one end affixed to the titanium rod (3).

3. The spinal internal fixation bending rod angle measurement tool according to claim 1, characterized in that: The intervals of the angle marks on the sector-shaped measuring disc (11) are 5 degrees.

4. The spinal internal fixation bending rod angle measurement tool according to claim 1, characterized in that: The titanium rod (3) is in an arc-shaped structure as a whole.

5. The spinal internal fixation bending rod angle measurement tool according to claim 1, characterized in that: The cylindrical metal rod (1) and the support column (10) have the same length.

6. The spinal internal fixation bending rod angle measurement tool according to claim 2, characterized in that: Two sets of inclined plates are symmetrically fixed along the up-down direction to one end of the locking bolt (6) away from the titanium rod (3).

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