Spine fixator

Abstract

The invention relates to the technical field of spine fixation and discloses a spine fixator which comprises two main body rods, a stabilizing rod is arranged between the two main body rods, a first adjusting assembly is arranged on each main body rod and comprises two extension rods, and the two extension rods are arranged on the left side and the right side of each main body rod respectively. In the using process, the distance of the extending rods extending out of the outer sides of the main body rods is adjusted to be matched with the distance of the positioning heads, meanwhile, the distance of the adjusting rods extending out of the outer sides of the hollow rods is adjusted to be matched with the distance between the two main body rods, and therefore the device is suitable for patients with different physique characteristics to use. Compared with a traditional mode that a rod body is cut, the spine fixing device is more flexible, on the basis, by controlling a trapezoidal positioning plate to be tightly attached to the interior of a limiting groove and controlling a rectangular extrusion block to be attached to the interior of a U-shaped plate, the stability of the spine after fixing can be effectively guaranteed, and safety is higher.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of spinal fixation, in particular to a spinal fixation device. BACKGROUND

[0002] Spinal fixation generally refers to a kind of spinal rehabilitation treatment means for achieving the treatment of stabilizing spinal structure, relieving pain and restoring spinal function by implanting screws, steel plates, supports and other internal fixation devices in the upper part of the patient's spine.

[0003] Patent publication No. CN117442318B discloses a kind of spinal fixation apparatus, comprising: two fixed components;Each fixed component includes a plurality of fixed rods and a plurality of movable components;Each movable component includes an intermediate rod and two side rods;Two side rods are respectively threaded to the ends of the intermediate rod;Each side rod is internally provided with a first movable slot;Each first movable slot is provided with a first movable ball;Each first movable ball is provided with a first connecting rod;The first connecting rod is detachably connected to the fixed rod;The intermediate rod is provided with a sliding slot;Two sliding blocks are slidably arranged in the sliding slot;The top of the intermediate rod is provided with a rotating slot;A bidirectional screw is rotatably connected in the rotating slot;Two moving blocks are provided on the bidirectional screw;Each moving block is connected to the corresponding sliding block;The bidirectional screw is provided with a rotating wheel.The overall structure is simple, convenient to operate, can quickly adapt to the physical conditions of different patients, meet the use requirements of different patients, and has strong applicability.

[0004] The above device adjusts the fixed device to adapt to the physical conditions of different patients when fixing the spine. In the actual spinal fixation process, since the spine is the axial support bone chain structure of the human body, it is necessary to stabilize it when fixing it. Although the above device meets the use requirements of different patients, it uses screw rotation adjustment when adjusting the overall length. Since the spine bends with the body bending and other actions, the screw adjustment method is prone to shaking when the spine bends and other actions, which reduces the overall fixation effect of the fixed device. The stability and safety are not good enough, so a spinal fixation device is proposed to solve the above problems. SUMMARY

[0005] To solve the above-mentioned problems, the present application provides a kind of spinal fixation device.

[0006] The spinal fixation device provided by the present application adopts the following technical scheme:

[0007] A spinal fixation device, comprising two main rods, a stable rod is arranged between the two main rods, and a first adjusting assembly is arranged on the main rod.

[0008] The first adjusting assembly comprises two extension rods arranged on the left and right sides of the main rod, the outer sides of the main rod and the extension rods are provided with positioning heads, the main rod and the extension rods penetrate through the positioning heads, the extension rods extend into the main rod, the extension rods are slidably connected with two trapezoidal positioning plates, the two trapezoidal positioning plates extend out of the extension rods, the extension rods are provided with a trapezoidal extrusion plate, the trapezoidal extrusion plate is arranged between the two trapezoidal positioning plates, and the top of the trapezoidal extrusion plate is rotatably connected with a first bolt rod.

[0009] The second adjusting assembly is arranged on the stable rod, the second adjusting assembly comprises a hollow rod, the hollow rod is integrally formed at one end of the stable rod, the hollow rod is provided with an adjusting rod at one end, the adjusting rod extends into the hollow rod and is matched with the hollow rod, the one end of the adjusting rod is fixedly connected with a U-shaped plate, the hollow rod is provided with a rectangular extrusion plate inside, the rectangular extrusion plate extends into the U-shaped plate and is matched with the U-shaped plate, the top of the rectangular extrusion plate is rotatably connected with a second bolt rod, the outer side of the main rod is provided with a positioning seat, and the stable rod and the adjusting rod penetrate through the two positioning seats respectively.

[0010] By adopting the above technical scheme, in the use process, the distance of the extension rod extending out of the outer side of the main rod is adjusted to match the spacing of the positioning heads, and the distance of the adjusting rod extending out of the outer side of the hollow rod is adjusted to match the spacing between the two main rods, so as to adapt to the use of patients with different body characteristics. Compared with the traditional method of cutting the rod body, it is more flexible, and on this basis, by controlling the trapezoidal positioning plate to tightly abut against the limiting groove inside and controlling the rectangular extrusion block to abut against the U-shaped plate inside, the stability after adjustment is ensured, the stability after fixing the spine is effectively ensured, and the safety is higher.

[0011] Preferably, the main rod is provided with a limiting groove inside, the extension rod extends into the limiting groove and is matched with the limiting groove, the trapezoidal positioning plate is matched with the inner side of the limiting groove, and the first bolt rod extends out of the extension rod and is connected with the extension rod through threads.

[0012] By adopting the above technical scheme, after the first bolt rod is rotated, the first bolt rod drives the trapezoidal extrusion plate to move.

[0013] Preferably, the bottom of the positioning head is provided with a bone nail, one end of the bone nail is integrally formed with a ball, the ball penetrates through the bottom wall of the positioning head and is movably connected with the bottom wall of the positioning head, the positioning head is provided with a fixing rod inside, the fixing rod is connected with the positioning head through threads, a through groove is formed in the positioning head, and the extension rod is matched with the outer side of the ball.

[0014] By adopting the technical scheme, the bottom wall of the positioning head is movably connected with the sphere, so that the positioning head can swing at multiple angles outside the sphere to match the installation requirements of different angles.

[0015] Preferably, a T-shaped slot is formed in the sphere, a first fixing plate is arranged at the bottom of the fixing rod, the first fixing plate penetrates through the through slot and matches the through slot, the first fixing plate is attached to the outer sides of the main rod and the extension rod respectively, and the first fixing plate is connected with the bottom of the fixing rod through a rotating shaft.

[0016] By adopting the technical scheme, the T-shaped slot is used to control the rotation of the sphere, and then the bone nail is drilled into the bone.

[0017] Preferably, a control ring is rotatably connected to one end of the adjusting rod, and the adjusting rod penetrates through the control ring and is connected with the control ring through a thread.

[0018] By adopting the technical scheme, after the control ring is rotated, the control ring drives the adjusting rod to move.

[0019] Preferably, an insertion slot is formed in each of the extension rod and the main rod, the bottom wall of the positioning seat extends into the insertion slot and matches the insertion slot, a limiting slot is formed in the top of the extension rod, a second fixing plate is slidably connected in the positioning seat, a third bolt rod is rotatably connected to the top of the second fixing plate, the third bolt rod penetrates through the top wall of the positioning seat and is connected with the positioning seat through a thread, and the outer surfaces of the stabilizing rod and the adjusting rod are respectively attached to the second fixing plates.

[0020] By adopting the technical scheme, the fixing plates fix the stabilizing rod or the adjusting rod inside the positioning seat.

[0021] Preferably, the bottom end of the second fixing plate extends into the limiting slot, and the second fixing plate matches the limiting slot.

[0022] By adopting the technical scheme, the second fixing plate extends into the limiting slot, so that the positioning seat can be prevented from falling off.

[0023] Preferably, a U-shaped slot is formed in the stabilizing rod, and the U-shaped plate extends into the U-shaped slot and matches the U-shaped slot.

[0024] By adopting the technical scheme, after the U-shaped plate is inserted into the U-shaped slot, the rotation of the adjusting rod relative to the hollow rod can be avoided.

[0025] Preferably, the second bolt rod extends out of the hollow rod, and the second bolt rod is connected with the hollow rod through a thread.

[0026] By adopting the technical scheme, after the second bolt rod is rotated, the rectangular extrusion plate is driven to move up and down.

[0027] In summary, the present application includes the following beneficial technical effects:

[0028] 1. A spinal column fixator, in use, by adjusting the distance of the extension rod extending out of the main rod to match the spacing of the positioning head, and by adjusting the distance of the adjusting rod extending out of the hollow rod to match the spacing between the two main rods, to adapt to the use of patients with different body characteristics, which is more flexible compared to the traditional way of cutting the rod body, and on this basis, by controlling the trapezoidal positioning plate tightly inside the limiting groove, and controlling the rectangular extrusion block to fit inside the U-shaped plate, the stability of the fixed spine can be effectively guaranteed, and the safety is higher.

[0029] 2. A spinal column fixator, which can flexibly adjust the assembly spacing and length according to the physical conditions of different patients, and compared to the traditional way of determining the support length by cutting, the length control is more accurate, and it can also avoid the situation that the subsequent patient may be uncomfortable due to the burrs on the edge of the rod caused by cutting.

[0030] 3. A spinal column fixator, which further ensures the stability after adjustment on the basis of flexible adjustment, and on this basis, the overall structure of the device is simple, which is beneficial to control the use cost, and also beneficial to the quick operation of the staff, and beneficial to ensure the smooth progress of the spinal column fixation work. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is a schematic view of the structure of the present application;

[0032] Figure 2 is a sectional view of the main rod in the present application;

[0033] Figure 3 is an enlarged view of A in Figure 2

[0034] Figure 4 is a sectional view of the extension rod and the main rod separated in the present application;

[0035] Figure 5 is a structural schematic view of the fixed rod and the positioning head separated in the present application;

[0036] Figure 6 is a sectional view of the adjusting rod and the hollow rod separated in the present application;

[0037] Figure 7 is an enlarged view of B in Figure 6

[0038] ​​Explanation of reference signs: 1, main rod; 2, stabilizing rod; 3, first adjusting assembly; 31, extension rod; 32, positioning head; 33, trapezoidal positioning plate; 34, trapezoidal extrusion plate; 35, first bolt rod; 36, limiting groove; 4, second adjusting assembly; 41, hollow rod; 42, adjusting rod; 43, U-shaped groove; 44, rectangular extrusion plate; 45, U-shaped plate; 46, second bolt rod; 47, positioning seat; 48, control ring; 49, insertion slot; 491, limiting groove; 492, second top fixing plate; 493, third bolt rod; 5, bone nail; 6, ball; 7, fixed rod; 8, first top fixing plate. DETAILED DESCRIPTION

[0039] The following will be described in detail below with reference to the accompanying drawings Figure 1 - accompanying drawings Figure 7 The application will be further described in detail.

[0040] The application discloses a spine fixator. Referring to Figures 1-7 , including two main rods 1, two main rods 1 are provided with a stabilizing rod 2, the main rod 1 is provided with a first adjusting assembly 3, the first adjusting assembly 3 includes two extension rods 31, two extension rods 31 are respectively arranged on the left and right sides of the main rod 1, the main rod 1 and the extension rod 31 are provided with a positioning head 32 on the outside, the main rod 1 and the extension rod 31 are penetrated through the positioning head 32, the extension rod 31 extends into the inside of the main rod 1, two trapezoidal positioning plates 33 are slidably connected in the extension rod 31, two trapezoidal positioning plates 33 extend out of the extension rod 31, a trapezoidal extrusion plate 34 is arranged in the extension rod 31, the trapezoidal extrusion plate 34 is arranged between the two trapezoidal positioning plates 33, and the trapezoidal extrusion plate 34 is rotatably connected with a first bolt rod 35 at the top;

[0041] The stabilizing rod 2 is provided with a second adjusting assembly 4, the second adjusting assembly 4 includes a hollow rod 41, the hollow rod 41 is integrally formed at one end of the stabilizing rod 2, the hollow rod 41 is provided with an adjusting rod 42 at one end, the adjusting rod 42 extends into the inside of the hollow rod 41 and matches the hollow rod 41, the adjusting rod 42 is fixedly connected with a U-shaped plate 45 at one end, the hollow rod 41 is provided with a rectangular extrusion plate 44 in the inside, and the rectangular extrusion plate 44 extends into the inside of the U-shaped plate 45 and matches the U-shaped plate 45;

[0042] The second bolt rod 46 is rotatably connected to the top of the rectangular extruded plate 44, the positioning seat 47 is arranged outside the main body rod 1, the stable rod 2 and the adjusting rod 42 respectively penetrate through two positioning seats 47, in the use process, the distance of the extending rod 31 extending outside the main body rod 1 is adjusted to match the spacing of the positioning head 32, and the distance of the adjusting rod 42 extending outside the hollow rod 41 is adjusted to match the spacing between the two main body rods 1, so as to adapt to the use of patients with different body characteristics, compared with the traditional way of cutting the rod body, it is more flexible, and on this basis, the stability after adjustment is guaranteed by controlling that the trapezoidal positioning plate 33 is tightly attached to the limiting groove 36 inside and the rectangular extruded block is tightly attached to the U-shaped plate 45 inside, so that the stability after the spine is fixed can be effectively guaranteed, and the safety is higher.

[0043] The limiting groove 36 is arranged in the main body rod 1, the extending rod 31 extends into the limiting groove 36 and matches the limiting groove 36, the trapezoidal positioning plate 33 is attached to the inside of the limiting groove 36, the first bolt rod 35 extends outside the extending rod 31 and is connected with the extending rod 31 through threads, after the first bolt rod 35 is rotated, the first bolt rod 35 drives the trapezoidal extruded plate 34 to move, the bone nail 5 is arranged at the bottom of the positioning head 32, the ball 6 is integrally formed at one end of the bone nail 5, the ball 6 penetrates through the bottom wall of the positioning head 32 and is movably connected with the bottom wall of the positioning head 32, the fixing rod 7 is arranged in the positioning head 32 and is connected with the positioning head 32 through threads, the through slot is arranged in the positioning head 32, the extending rod 31 is attached to the outside of the ball 6, the ball 6 is movably connected with the bottom wall of the positioning head 32, so that the positioning head 32 can be swung at multiple angles outside the ball 6 to match the installation requirements of different angles.

[0044] The slot is arranged on the ball 6, the first fixing plate 8 is arranged at the bottom of the fixing rod 7, the first fixing plate 8 penetrates through the through slot and matches the through slot, the first fixing plate 8 is attached to the outside of the main body rod 1 and the extending rod 31 respectively, the first fixing plate 8 is connected with the bottom of the fixing rod 7 through the rotating shaft, the rotation of the ball 6 is controlled through the slot, and then the bone nail 5 is drilled into the bone, the control ring 48 is rotatably connected to one end of the adjusting rod 42 towards the hollow rod 41, the adjusting rod 42 penetrates through the control ring 48 and is connected with the control ring 48 through threads, after the control ring 48 is rotated, the control ring 48 drives the adjusting rod 42 to move;

[0045] The extension rod 31 and the main body rod 1 are provided with insertion grooves 49, the bottom wall of the positioning seat 47 extends into the insertion grooves 49 and matches the insertion grooves 49, the top of the extension rod 31 is provided with a limiting groove 491, the second top fixing plate 492 is slidably connected in the positioning seat 47, the third bolt rod 493 is rotatably connected to the top of the second top fixing plate 492, the third bolt rod 493 penetrates the top wall of the positioning seat 47 and is connected with the positioning seat 47 through threads, and the two second top fixing plates 492 are respectively attached to the outer side surfaces of the stabilizing rod 2 and the adjusting rod 42. The top fixing plate fixes the stabilizing rod 2 or the adjusting rod 42 in the inner side of the positioning seat 47.

[0046] The bottom end of the second top fixing plate 492 extends into the limiting groove 491, the second top fixing plate 492 matches the limiting groove 491, the second top fixing plate 492 extends into the limiting groove 491 or can avoid the positioning seat 47 from falling off, the stabilizing rod 2 is provided with a U-shaped groove 43, the U-shaped plate 45 extends into the U-shaped groove 43 and matches the U-shaped groove 43, after the U-shaped plate 45 is inserted into the U-shaped groove 43, the adjusting rod 42 can be prevented from rotating relative to the hollow rod 41, the second bolt rod 46 extends out of the hollow rod 41, and the second bolt rod 46 is connected with the hollow rod 41 through threads. The second bolt rod 46 drives the rectangular extrusion plate 44 to move up and down after being rotated.

[0047] In actual operation, after the control ball 6 is rotated, the ball 6 drives the bone nail 5 to rotate, so that the bone nail 5 can be drilled into the patient's spine, after all the bone nails 5 are drilled in, the length of the extension rod 31 extending out of the main body rod 1 is adjusted according to the spacing between the unilateral bone nails 5 of the spine. When adjusting, the extension rod 31 is directly pulled out of the main body rod 1 or pushed into the main body rod 1, and after adjustment, the first bolt rod 35 is tightened. During the screwing-in period, the trapezoidal extrusion plate 34 is driven to move downward, and at this time, the trapezoidal extrusion plate 34 extrudes the inclined surfaces of the two trapezoidal positioning plates 33 to form the effect of extruding and pushing the trapezoidal positioning plate 33 to the outer side of the extension rod 31. When the trapezoidal positioning plate 33 is tightly attached to the limiting groove 36, the friction between them can ensure the stability of the extension rod 31.

[0048] After the above adjustment steps are completed, the main body rod 1 and the extension rod 31 are respectively penetrated through the positioning head 32, and then the fixing rod 7 is tightened in the positioning head 32, so that the fixing rod 7 drives the first top fixing plate 8 to move downward to tightly extrude the main body rod 1 or the extension rod 31 in the positioning head 32, thereby completing the combination and construction between the positioning head 32 and the main body rod 1 and the extension rod 31.

[0049] Finally, the appropriate position is selected to install the positioning seat 47, and during the specific installation, the bottom wall of the positioning seat 47 is inserted into the slot 49, and then the extension of the adjusting rod 42 outside the hollow rod 41 is adjusted according to the spacing between the two main body rods 1; during the adjustment, the control ring 48 is rotated to drive the adjusting rod 42 to move horizontally; after the adjusting rod 42 is moved, the second bolt rod 46 is tightened, the rectangular extrusion plate 44 is tightly attached to the inside of the U-shaped plate 45, and the friction between the rectangular extrusion plate 44 and the U-shaped plate 45 can ensure the stability of the adjusting rod 42;

[0050] Finally, the stable rod 2 and the adjusting rod 42 are respectively penetrated through the two positioning seats 47, and the third bolt rod 493 is tightened, the second top plate 492 is driven to move downward, and when the second top plate 492 moves to the inside of the limiting groove 491, the positioning seat 47 can be prevented from falling off, and the stability during the installation of the positioning seat 47 is improved; with the continuous downward movement of the second top plate 492, the second top plate 492 tightly extrudes the stable rod 2 or the adjusting rod 42 inside the positioning seat 47, so as to complete the whole assembly process; through the above operation for adjustment, it can be adapted to patients with different body characteristics, and compared with the traditional way of cutting the rod body, it is more flexible, and on this basis, through the way of tightly attaching the trapezoidal positioning plate 33 to the inside of the limiting groove 36 and tightly attaching the rectangular extrusion block to the inside of the U-shaped plate 45, the stability after the fixation of the spine can be effectively guaranteed, and the safety is higher.

[0051] The above are the preferred embodiments of the present application, and are not limited to the protection scope of the present application, so: any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A spinal fixation device, characterized in that: It includes two main rods (1), a stabilizing rod (2) is provided between the two main rods (1), and a first adjusting component (3) is provided on the main rods (1). The first adjustment component (3) includes two extension rods (31), which are respectively located on the left and right sides of the main body rod (1). The main body rod (1) and the extension rods (31) are provided with positioning heads (32) on their outer sides. The main body rod (1) and the extension rods (31) pass through the positioning heads (32). The extension rods (31) extend into the interior of the main body rod (1). Two trapezoidal positioning plates (33) are slidably connected inside the extension rods (31). The two trapezoidal positioning plates (33) extend out of the extension rods (31). A trapezoidal extrusion plate (34) is provided inside the extension rods (31). The trapezoidal extrusion plate (34) is located between the two trapezoidal positioning plates (33). A first bolt rod (35) is rotatably connected to the top of the trapezoidal extrusion plate (34). The stabilizing rod (2) is provided with a second adjusting component (4). The second adjusting component (4) includes a hollow rod (41). The hollow rod (41) is integrally formed on one end of the stabilizing rod (2). An adjusting rod (42) is provided on one end of the hollow rod (41). The adjusting rod (42) extends into the hollow rod (41) and matches the hollow rod (41). A U-shaped plate (45) is fixedly connected to one end of the adjusting rod (42). A rectangular extrusion plate (44) is provided inside the hollow rod (41). The rectangular extrusion plate (44) extends into the U-shaped plate (45) and matches the U-shaped plate (45). A second bolt rod (46) is rotatably connected to the top of the rectangular extrusion plate (44). A positioning seat (47) is provided outside the main rod (1). The stabilizing rod (2) and the adjusting rod (42) pass through the two positioning seats (47) respectively.

2. The spinal fixation device according to claim 1, characterized in that: The main rod (1) has a limiting groove (36) inside. The extension rod (31) extends into the limiting groove (36) and matches the limiting groove (36). The trapezoidal positioning plate (33) fits against the inner side of the limiting groove (36). The first bolt rod (35) extends out of the extension rod (31) and is connected to the extension rod (31) by a thread.

3. A spinal fixation device according to claim 1, characterized in that: The positioning head (32) is provided with a bone screw (5) at the bottom. One end of the bone screw (5) is integrally formed with a ball (6). The ball (6) penetrates the bottom wall of the positioning head (32) and is movably connected to the bottom wall of the positioning head (32). A fixing rod (7) is provided inside the positioning head (32). The fixing rod (7) is connected to the positioning head (32) by a thread. A through groove is opened on the positioning head (32). The extension rod (31) fits against the outside of the ball (6).

4. A spinal fixation device according to claim 3, characterized in that: A groove is provided on the sphere (6), and a first top plate (8) is provided at the bottom of the fixing rod (7). The first top plate (8) passes through the groove and matches the groove. The first top plate (8) is attached to the outer side of the main rod (1) and the extension rod (31) respectively. The first top plate (8) is connected to the bottom of the fixing rod (7) through a rotating shaft.

5. A spinal fixation device according to claim 1, characterized in that: The hollow rod (41) is rotatably connected to a control ring (48) at one end facing the adjusting rod (42). The adjusting rod (42) passes through the control ring (48) and is connected to the control ring (48) by a thread.

6. A spinal fixation device according to claim 1, characterized in that: Both the extension rod (31) and the main rod (1) are provided with slots (49). The bottom wall of the positioning seat (47) extends into the slot (49) and matches the slot (49). The top of the extension rod (31) is provided with a limiting groove (491). The positioning seat (47) is slidably connected with a second top fixing plate (492). The top of the second top fixing plate (492) is rotatably connected with a third bolt rod (493). The third bolt rod (493) passes through the top wall of the positioning seat (47) and is threadedly connected to the positioning seat (47). The two second top fixing plates (492) are respectively attached to the outer surfaces of the stabilizing rod (2) and the adjusting rod (42).

7. A spinal fixation device according to claim 6, characterized in that: The bottom end of the second top plate (492) extends into the interior of the limiting groove (491), and the second top plate (492) matches the limiting groove (491).

8. A spinal fixation device according to claim 1, characterized in that: The stabilizing rod (2) has a U-shaped groove (43), and the U-shaped plate (45) extends into the U-shaped groove (43) and matches the U-shaped groove (43).

9. A spinal fixation device according to claim 1, characterized in that: The second bolt rod (46) extends out of the hollow rod (41), and the second bolt rod (46) and the hollow rod (41) are connected by threads.

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