Spinal fracture posterior quantitative distraction reduction external fixation device

Abstract

The invention discloses a spinal fracture posterior quantitative distraction reduction external fixation device, and relates to the technical field of medical instruments, the spinal fracture posterior quantitative distraction reduction external fixation device comprises an adjusting mechanism, the top of the adjusting mechanism is movably connected with a supporting mechanism, the interior of the supporting mechanism is slidably connected with a connecting mechanism, and the surface of the connecting mechanism is engaged with a rotating mechanism; and the rotating mechanism is sleeved with the supporting mechanism, and a fixing mechanism is fixedly connected to the surface of the adjusting mechanism. The extension rod is rotated to drive the screw rod to rotate in the distraction rods, the lengths of the extension rod and the distraction rods are adjusted, the device is prevented from affecting operation of a doctor, the purpose of improving the operation quality is achieved, after the distraction rods on the two sides are adjusted to a proper distance, the insertion rod is placed in the insertion hole, and the operation is convenient. And meanwhile, the distance between the distraction rods is further fixed, so that the purpose of improving the stability of the device during distraction is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, and in particular to a posterior quantitative distraction reduction external fixation device for spinal fractures. Background Art

[0002] Spinal fracture is one of the common traumas, especially thoracolumbar fracture is the most common clinically. For thoracolumbar fracture without nerve damage, most of them need surgical treatment except some minor fractures that do not require surgical treatment. Medical expander is a commonly used tool in spinal surgery. Its main function is to expand the distance between the vertebrae of the spine longitudinally to achieve spinal reduction.

[0003] The Chinese patent application publication number CN214966468U discloses an external fixation device for quantitative distraction reduction of spinal fractures through the posterior approach. The fixing mechanism includes a connecting block fixed on the top of a long screw, and a connecting rod is fixedly connected between the two connecting blocks by a fixing bolt. The utility model enables the staff to obtain an accurate quantitative guidance index when adjusting the distance between the two long screws, so that the operation success rate is higher.

[0004] In order to solve the problem that the disassembly steps are relatively complicated when the device needs to be disassembled in the above-mentioned technical solution, the existing technology adopts the method of using the clamping structure in the limiting mechanism to reduce the use of bolts. However, there is still a situation where the length of the expansion rod cannot be adjusted according to specific needs, which leads to insufficient distance between the device and the patient during surgery, affecting the quality of the surgery. Summary of the invention

[0005] The object of the present invention is to provide a posterior quantitative distraction reduction external fixation device for spinal fractures to solve the problems raised in the above-mentioned background technology.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] A posterior quantitative distraction reduction external fixation device for spinal fractures comprises an adjustment mechanism, the top of the adjustment mechanism is movably connected to a support mechanism, the interior of the support mechanism is slidably connected to a connecting mechanism, the surface of the connecting mechanism is meshingly connected to a rotating mechanism, the rotating mechanism is sleeved inside the support mechanism, the surface of the adjustment mechanism is fixedly connected to a fixing mechanism, and the fixing mechanism is located below the support mechanism.

[0008] The adjustment mechanism comprises a spreading rod, the bottom of the spreading rod is fixedly connected with an anti-slip ring, the inner thread of the spreading rod is connected with a screw rod, and the tail end of the screw rod is fixedly connected with an extension rod.

[0009] A further improvement of the technical solution of the present invention is that: a connecting rod is fixedly connected to the top of the expansion rod, a connecting plate is fixedly connected to the surface of the connecting rod, and a steel ball is rotatably connected to the inside of the connecting plate. During the expansion process of the device, the steel ball is driven to rotate inside the connecting plate, thereby making the movement of the connecting plate smoother.

[0010] A further improvement of the technical solution of the present invention is that the supporting mechanism includes a supporting frame, the supporting frame is located at the top of the expansion rod, the top of the supporting frame is movably connected with a dustproof net, and alarms are provided on the left and right sides of the inner wall of the supporting frame. When the expansion size of the device is adjusted, the alarm will sound an alarm and stop adjusting the expansion size of the device, thereby avoiding a situation where the distance between the expansion rods on both sides is large, causing harm to the patient.

[0011] A further improvement of the technical solution of the present invention is that: a slide groove 1 is opened inside the support frame, a slide groove 2 is opened at the bottom of the support frame, the slide groove 2 is sleeved with the connecting plate and the steel ball, the bottom of the support frame is sleeved on the outside of the connecting rod, and a handle is fixedly connected to the top of the support frame. By holding the handle, the position of the device can be changed, thereby achieving the purpose of improving the mobility of the device.

[0012] A further improvement of the technical solution of the present invention is that the connecting mechanism includes a U-shaped connecting frame, the bottom of the U-shaped connecting frame is fixedly connected to the top of the connecting rod, the rear side of the U-shaped connecting frame is fixedly connected with an extrusion block, the extrusion block is located on the inner side of the alarm, and the inner side of the U-shaped connecting frame is fixedly connected with a gear bar. When the expansion distance of the device is adjusted, if the extrusion block squeezes the alarm, the alarm sounds an alarm, thereby avoiding harm to the patient due to a large distance when the device is adjusted.

[0013] A further improvement of the technical solution of the present invention is that: a sliding rod is fixedly connected to the back of the gear bar, and the sliding rod is movably connected to the inside of the slide groove; a rubber buffer strip is fixedly connected to the tail end of the gear bar, and a buffer spring is sleeved on the outside of the rubber buffer strip. The rubber buffer strip and the buffer spring can reduce vibration, thereby avoiding affecting the surgical process and causing harm to the patient.

[0014] A further improvement of the technical solution of the present invention is that: the rotating mechanism includes a gear, the gear is meshingly connected with the surface of the gear bar, the outside of the gear is fixedly connected with an anti-skid pad 1, the anti-skid pad 1 is meshingly connected with the surface of the gear bar, the upper surface of the gear is fixedly connected with a rotating rod, the rotating rod is sleeved on the top of the support frame, and the lower surface of the rotating rod is in contact with the upper surface of the support frame, and the top of the rotating rod is fixedly connected with an anti-skid pad 2, and the anti-skid pad 1 can increase the friction between the gear and the gear bar, thereby achieving the purpose of improving the stability of the device.

[0015] A further improvement of the technical solution of the present invention is that the fixing mechanism includes an extension plate, a plug hole is provided on the front side of the extension plate, a storage plate is sleeved on the outside of the extension plate, and a T-shaped hole is provided on the front side of the storage plate. When the expansion distance of the device becomes smaller, the tail end of the extension plate will enter the interior of the storage plate, thereby reducing the space occupied by the device.

[0016] A further improvement of the technical solution of the present invention is that: an insertion rod is sleeved inside the T-shaped hole, the insertion rod is sleeved with the socket, the extension plate and the storage plate are fixedly connected to the outside of the support rod, the inside of the T-shaped hole is larger, and the tail end of the insertion rod is larger, so that the T-shaped hole can fix the position of the insertion rod to prevent the insertion rod from falling and being lost.

[0017] Due to the adoption of the above technical solution, the present invention has the following technical advances compared with the prior art:

[0018] 1. The present invention provides a posterior quantitative distraction and reduction external fixation device for spinal fractures. According to the treatment requirements, the extension rod is rotated to drive the screw rod to rotate inside the distraction rod. The inside of the distraction rod is threaded, so that the positions of the extension rod and the screw rod can be fixed without applying external force. When the lengths of the extension rod and the distraction rod are consistent with the treatment requirements, the rotation of the extension rods on both sides can be stopped, thereby avoiding the device from affecting the doctor's operation during treatment. At the same time, the device provides convenience for the doctor's operation, thereby achieving the purpose of improving the quality of surgery.

[0019] 2. The present invention provides a posterior quantitative distraction and reduction external fixation device for spinal fractures. The distance between the distraction rods on both sides is adjusted by rotating the gear. When the distance between the distraction rods is reduced, the tail end of the extension plate will enter the interior of the storage plate. After adjusting to a suitable distance, the insertion rod is placed in the insertion hole to fix the extension plate and the storage rod. Subsequently, the position of the gear bar is fixed by the distraction rod, the connecting rod and the U-shaped connecting frame, thereby achieving the purpose of improving the stability of the device when it is distracted. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall cross-sectional structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the cross-sectional structure of the adjustment mechanism of the present invention;

[0022] Figure 3 It is a schematic diagram of the cross-sectional structure of the support mechanism of the present invention;

[0023] Figure 4 It is a schematic diagram of the connection mechanism structure of the present invention;

[0024] Figure 5 It is a schematic diagram of the structure of the rotating mechanism of the present invention;

[0025] Figure 6 It is a schematic diagram of the fixing mechanism structure of the present invention.

[0026] In the figure: 1. adjustment mechanism; 11. opening rod; 12. anti-skid ring; 13. screw; 14. extension rod; 15. connecting rod; 16. connecting plate; 17. steel ball; 2. support mechanism; 21. support frame; 22. dust net; 23. alarm; 24. slideway 1; 25. slideway 2; 26. handle; 3. connecting mechanism; 31. U-shaped connecting frame; 32. extrusion block; 33. gear bar; 34. slide bar; 35. buffer bar; 36. buffer spring; 4. rotating mechanism; 41. gear; 42. anti-skid pad 1; 43. rotating rod; 44. anti-skid pad 2; 5. fixing mechanism; 51. extension plate; 52. socket; 53. storage plate; 54. T-hole; 55. plug rod. DETAILED DESCRIPTION

[0027] The present invention is further described in detail below in conjunction with embodiments:

[0028] Example 1

[0029] like Figure 1-6 As shown, the present invention provides a posterior quantitative distraction reduction external fixation device for spinal fractures, comprising an adjustment mechanism 1, the top of the adjustment mechanism 1 is movably connected with a support mechanism 2, the inside of the support mechanism 2 is slidably connected with a connecting mechanism 3, the surface of the connecting mechanism 3 is meshingly connected with a rotating mechanism 4, the rotating mechanism 4 is sleeved inside the support mechanism 2, the surface of the adjustment mechanism 1 is fixedly connected with a fixing mechanism 5, the fixing mechanism 5 is located below the support mechanism 2, the adjustment mechanism 1 comprises a distraction rod 11, the bottom of the distraction rod 11 is fixedly connected with an anti-slip ring 12, the inside of the distraction rod 11 is threadedly connected with a screw rod 13, the tail end of the screw rod 13 is fixedly connected with an extension rod 14, the top of the distraction rod 11 is fixedly connected with a connecting rod 15, the surface of the connecting rod 15 is fixedly connected with a connecting plate 16, and the inside of the connecting plate 16 is rotatably connected with a steel ball 17;

[0030] Specifically, before treating the patient, according to the needs of treatment, the extension rod 14 is rotated to drive the screw 13 to rotate inside the expansion rod 11. The inside of the expansion rod 11 is threaded, so that the positions of the extension rod 14 and the screw 13 can be fixed without applying external force. At the same time, the anti-slip ring 12 can increase the friction between the screw 13 and the expansion rod 11, and improve the fixing strength of the extension rod 14 and the screw 13. When the lengths of the extension rod 14 and the expansion rod 11 are consistent with the treatment needs, the rotation of the extension rods 14 on both sides can be stopped, so as to meet the treatment needs and avoid affecting the treatment process. During the expansion process of the device, the steel ball 17 is driven to rotate in the slide groove 24 and the connecting plate 16, so that the connecting plate 16 moves more smoothly.

[0031] Example 2

[0032] like Figure 1-6 As shown, on the basis of Example 1, the present invention provides a technical solution: preferably, the support mechanism 2 includes a support frame 21, the support frame 21 is located at the top of the propping rod 11, the top of the support frame 21 is movably connected with a dustproof net 22, the left and right sides of the inner wall of the support frame 21 are provided with an alarm 23, a slide groove 1 24 is provided inside the support frame 21, a slide groove 25 is provided at the bottom of the support frame 21, the slide groove 25 is sleeved with the connecting plate 16 and the steel ball 17, the bottom of the support frame 21 is sleeved on the outside of the connecting rod 15, and the top of the support frame 21 is fixedly connected with a handle 26;

[0033] Specifically, the support frame 21 supports and fixes the connecting mechanism 3 and the rotating mechanism 4. The heat generated when the connecting mechanism 3 and the rotating mechanism 4 are in operation is diffused through the dustproof net 22. At the same time, the dustproof net 22 can prevent external dust from entering the inside of the support frame 21, thereby preventing dust from affecting the operation during surgery. When adjusting the position of the two side opening rods 11, if the extrusion block 32 squeezes the alarm 23, the alarm 23 will sound an alarm, thereby preventing the distance between the two side opening rods 11 from being large, causing harm to the patient. The slide groove 1 24 supports the gear bar 33 by supporting the slide rod 34. The slide groove 2 25 supports the connecting rod 15 and fixes the moving line of the connecting rod 15, thereby improving the stability of the device and preventing the device from shaking during surgery.

[0034] like Figure 4-5 As shown, the connecting mechanism 3 includes a U-shaped connecting frame 31, the bottom of the U-shaped connecting frame 31 is fixedly connected to the top of the connecting rod 15, the rear side of the U-shaped connecting frame 31 is fixedly connected to an extrusion block 32, the extrusion block 32 is located on the inner side of the alarm 23, the inner side of the U-shaped connecting frame 31 is fixedly connected to a gear bar 33, the back of the gear bar 33 is fixedly connected to a slide bar 34, the slide bar 34 is movably connected to the inside of the slide slot 24, the tail end of the gear bar 33 is fixedly connected to a rubber buffer strip 35, the rubber buffer strip 35 is fixedly connected to the rear end of the gear bar 33, and the rubber buffer strip 35 is fixedly connected to the rear end of the gear bar 33. The outside of the punch bar 35 is sleeved with a buffer spring 36, and the rotating mechanism 4 includes a gear 41, which is meshed with the surface of the gear bar 33, and the outside of the gear 41 is fixedly connected with an anti-skid pad 1 42, and the anti-skid pad 1 42 is meshed with the surface of the gear bar 33. The upper surface of the gear 41 is fixedly connected with a rotating rod 43, and the rotating rod 43 is sleeved on the top of the support frame 21, and the lower surface of the rotating rod 43 is in contact with the upper surface of the support frame 21, and the top of the rotating rod 43 is fixedly connected with an anti-skid pad 2 44;

[0035] Specifically, when the distance between the two side spreading rods 11 needs to be adjusted, the rotating rod 43 drives the gear 41 to rotate, and the gear bar 33 is driven to move through the gear 41. The gear bars 33 on both sides move to drive the two side spreading rods 11 to move, and then the distance between the two side spreading rods 11 can be changed to meet the needs of the doctor during surgery. The gear bars 33 on both sides are symmetrical, and the tail end of the gear bar 33 will generate a certain vibration when it is in contact with the inner side of the U-shaped connecting frame 31, thereby fixing the rubber buffer strip 35 and the buffer spring 36 at the tail end of the gear bar 33. Therefore, when adjusting, if the spreading distance is small, the rubber buffer strip 35 and the buffer spring 36 can slow down the vibration, thereby avoiding affecting the surgical process and causing harm to the patient.

[0036] Example 3

[0037] like Figure 1-6 As shown, on the basis of embodiment 1, the present invention provides a technical solution: preferably, the fixing mechanism 5 includes an extension plate 51, a plug hole 52 is provided on the front side of the extension plate 51, a receiving plate 53 is sleeved on the outside of the extension plate 51, a T-shaped hole 54 is provided on the front side of the receiving plate 53, an insertion rod 55 is sleeved inside the T-shaped hole 54, the insertion rod 55 is sleeved with the plug hole 52, and the extension plate 51 and the receiving plate 53 are both fixedly connected to the outside of the propping rod 11;

[0038] Specifically, the distance between the two side expansion rods 11 is adjusted by rotating the gear 41. During the adjustment, the expansion rod 11 drives the extension plate 51 and the storage plate 53 to move. When the distance between the expansion rods 11 is reduced, the tail end of the extension plate 51 will enter the interior of the storage plate 53, thereby reducing the space occupied by the device. After adjusting to a suitable distance, the insertion rod 55 is placed in the insertion hole 52 to fix the extension plate 51 and the storage plate 53. Subsequently, the position of the gear bar 33 is fixed by the expansion rod 11, the connecting rod 15 and the U-shaped connecting frame 31, thereby improving the stability of the device.

[0039] The working principle of the posterior quantitative distraction reduction external fixation device for spinal fractures will be described in detail below.

[0040] like Figure 1-6As shown, according to the needs of treatment, the extension rod 14 is rotated to drive the screw rod 13 to rotate inside the expansion rod 11, and the length of the extension rod 14 and the expansion rod 11 is adjusted. After adjusting to the appropriate length, the extension rod 14 and the expansion rod 11 are placed in the place where the patient needs to be expanded, and then the rotating rod 43 is rotated to drive the gear 41 to rotate, and the gear bar 33 is driven to move through the gear 41. The gear bars 33 on both sides move to drive the expansion rods 11 on both sides to move, and then the distance between the expansion rods 11 on both sides can be changed. When the doctor's surgical needs are met, the rotating rod 43 is stopped from rotating, and then the insertion rod 55 is placed in the insertion hole 52, so as to fix the extension plate 51 and the storage plate 53, and further fix the distance between the expansion rods 11, thereby improving the stability of the device during surgery.

[0041] The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A posterior quantitative distraction reduction external fixation device for spinal fractures, comprising an adjustment mechanism (1), characterized in that: The top of the adjusting mechanism (1) is movably connected to the supporting mechanism (2), the interior of the supporting mechanism (2) is slidably connected to the connecting mechanism (3), the surface of the connecting mechanism (3) is meshingly connected to the rotating mechanism (4), the rotating mechanism (4) is sleeved inside the supporting mechanism (2), the surface of the adjusting mechanism (1) is fixedly connected to the fixing mechanism (5), and the fixing mechanism (5) is located below the supporting mechanism (2); The adjustment mechanism (1) comprises a spreading rod (11), the bottom of the spreading rod (11) is fixedly connected to an anti-slip ring (12), the internal thread of the spreading rod (11) is connected to a screw rod (13), and the tail end of the screw rod (13) is fixedly connected to an extension rod (14).

2. The posterior quantitative distraction reduction external fixation device for spinal fracture according to claim 1, characterized in that: The top of the spreading rod (11) is fixedly connected to a connecting rod (15), the surface of the connecting rod (15) is fixedly connected to a connecting plate (16), and the interior of the connecting plate (16) is rotatably connected to a steel ball (17).

3. The device for posterior quantitative distraction reduction and external fixation of spinal fractures according to claim 1, characterized in that: The support mechanism (2) comprises a support frame (21), the support frame (21) is located at the top of the support rod (11), the top of the support frame (21) is movably connected to a dustproof net (22), and alarms (23) are provided on both left and right sides of the inner wall of the support frame (21).

4. The device for posterior quantitative distraction reduction and external fixation of spinal fractures according to claim 3, characterized in that: A first slide groove (24) is provided inside the support frame (21), a second slide groove (25) is provided at the bottom of the support frame (21), the second slide groove (25) is sleeved with the connecting plate (16) and the steel ball (17), the bottom of the support frame (21) is sleeved on the outside of the connecting rod (15), and a handle (26) is fixedly connected to the top of the support frame (21).

5. The posterior quantitative distraction reduction external fixation device for spinal fracture according to claim 1, characterized in that: The connecting mechanism (3) comprises a U-shaped connecting frame (31), the bottom of the U-shaped connecting frame (31) is fixedly connected to the top of the connecting rod (15), the rear side of the U-shaped connecting frame (31) is fixedly connected to an extrusion block (32), the extrusion block (32) is located on the inner side of the alarm (23), and the inner side of the U-shaped connecting frame (31) is fixedly connected to a gear bar (33).

6. The device for posterior quantitative distraction reduction and external fixation of spinal fractures according to claim 5, characterized in that: The back of the gear bar (33) is fixedly connected to a slide bar (34), and the slide bar (34) is movably connected to the inside of the slide groove (24). The tail end of the gear bar (33) is fixedly connected to a rubber buffer strip (35), and the outside of the rubber buffer strip (35) is sleeved with a buffer spring (36).

7. The device for posterior quantitative distraction reduction and external fixation of spinal fractures according to claim 1, characterized in that: The rotating mechanism (4) comprises a gear (41), the gear (41) is meshedly connected with the surface of the gear bar (33), the outside of the gear (41) is fixedly connected with an anti-skid pad (42), the anti-skid pad (42) is meshedly connected with the surface of the gear bar (33), the upper surface of the gear (41) is fixedly connected with a rotating rod (43), the rotating rod (43) is sleeved on the top of the support frame (21), and the lower surface of the rotating rod (43) is in contact with the upper surface of the support frame (21), and the top of the rotating rod (43) is fixedly connected with an anti-skid pad (44).

8. The posterior quantitative distraction reduction external fixation device for spinal fractures according to claim 1, characterized in that: The fixing mechanism (5) comprises an extension plate (51), a plug hole (52) is provided on the front side of the extension plate (51), a receiving plate (53) is sleeved on the outside of the extension plate (51), and a T-shaped hole (54) is provided on the front side of the receiving plate (53).

9. The posterior quantitative distraction reduction external fixation device for spinal fractures according to claim 8, characterized in that: An insert rod (55) is sleeved inside the T-shaped hole (54), and the insert rod (55) is sleeved with the insert hole (52). The extension plate (51) and the storage plate (53) are both fixedly connected to the outside of the expansion rod (11).

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