External fixing tool for spine thoracolumbar spine whole vertebral body osteotomy

Abstract

The invention discloses an external fixing tool for vertebral column thoracolumbar vertebra total vertebral body osteotomy, and belongs to the technical field of medical instruments, the external fixing tool comprises an extension sleeve, one end, close to the vertebra, of the extension sleeve is connected with a temporary fixing rod through a fixing rod holding device, and the other end of the extension sleeve is provided with an upper opening connector and a side opening connector; the upper opening connector and the side opening connector are connected in series with the connecting rod; the fixing tool is fixed through the fixing rod, the stability of the relative position of adjacent vertebral bodies in the vertebral body excision process is guaranteed, nerve injury is avoided, the fixing effect is good, various forms of combinations can be conducted according to the spine malformation degree of a patient, and application is wide; the spinal column thoracolumbar vertebra whole vertebral body osteotomy fixing device can be used for fixing spinal column thoracolumbar vertebra whole vertebral body osteotomy and can assist in spinal column multi-plane orthopedic operation after vertebral body excision.

Description

Technical Field

[0001] The present application belongs to the field of medical device technology, and in particular, relates to an external fixation tool for full vertebral osteotomy of the thoracic and lumbar spine. Background Art

[0002] Vertebral body osteotomy (VCR) is a complex surgery used to correct severe spinal deformity. Its main difficulties are: 1. The risk of spinal cord injury and nerve root injury during the operation is extremely high, and 2. The adjacent vertebrae need to be corrected in multiple planes after vertebral resection. Therefore, in view of the above difficulties, an external fixation tool is needed to ensure the stability of the upper three vertebrae and the lower three vertebrae of the target vertebra during vertebral resection, so that their relative positions remain unchanged and nerve damage is avoided as much as possible. In addition, after vertebral resection, a tool is needed to assist in multi-plane spinal correction. Summary of the invention

[0003] The purpose of the implementation of the present application is to provide an external fixation tool for thoracic and lumbar full vertebral osteotomy to solve the technical problems in the prior art that during the vertebral resection process, the relative positions of the adjacent upper three vertebrae and the lower three vertebrae cannot be fixed, thereby damaging the nerves, and after the vertebral resection, the spine cannot be corrected in multiple planes.

[0004] To achieve the above-mentioned purpose, the technical solution adopted in the present application is: to provide an external fixation tool for thoracic and lumbar full vertebral osteotomy of the spine, including an extension sleeve, one end of the extension sleeve close to the vertebra is connected to a temporary fixation rod through a fixation rod holder, and the other end of the extension sleeve is provided with an upper opening connector and a side opening connector, and the upper opening connector and the side opening connector are connected in series with the rod.

[0005] In one embodiment,

[0006] The epitaxial sleeve comprises an epitaxial sleeve rod, a fixed rod holder is arranged at one end of the epitaxial sleeve rod, and the epitaxial sleeve rod and the fixed rod holder are connected through a connector.

[0007] In one embodiment,

[0008] The fixed rod holder comprises a first adjustable fixed rod holder and a second adjustable fixed rod holder, the second adjustable fixed rod holder is provided with an empty slot, the first adjustable fixed rod holder is movably connected to the second adjustable fixed rod holder through the empty slot and fixed by a screw plug.

[0009] In one embodiment,

[0010] An anti-rotation platform is arranged on the temporary fixing rod, and a fixing rod holder is arranged on the anti-rotation platform; and the width of the anti-rotation platform is 8-12 mm.

[0011] In one embodiment,

[0012] The upper-opening connector sequentially includes, from top to bottom, a first locking knob, a first connecting rod holder, a first locking pin, a second connecting rod holder, a third connecting rod holder, a first anti-disengagement pin, and a first locking ring.

[0013] In one embodiment,

[0014] The side-opening connector sequentially includes, from top to bottom, a second locking knob, a second locking pin, a fourth connecting rod holder, a second anti-disengagement pin, and a second locking ring.

[0015] In one embodiment,

[0016] The number of the upper-opening connectors and the side-opening connectors is at least one.

[0017] In one embodiment,

[0018] The temporary fixing rods are divided into short temporary fixing rods and long temporary fixing rods, the extension sleeves are divided into short extension sleeves and long extension sleeves, and the extension sleeve rods are divided into short extension sleeve rods and long extension sleeve rods.

[0019] In one embodiment,

[0020] The connecting rods are divided into long connecting rods and short connecting rods.

[0021] In one embodiment,

[0022] The number of the connecting rods is at least one.

[0023] The present application provides an external fixation tool for total vertebral body osteotomy of the thoracic and lumbar spine. The fixation tool is fixed by a fixing rod to ensure the stability of the relative positions of the adjacent upper three vertebral bodies and the lower three vertebral bodies during the process of removing the vertebral body, and avoid nerve injury; the fixing rod is matched with a fixing rod holder with adjustable length, and the fixing effect is better, which can ensure the smooth progress of the operation, and can also be combined in various forms according to the degree of spinal deformity of the patient, adapt to a variety of different cases, and has a wide application; the connectors in various forms can further play a fixing effect; the extension sleeve is adjustable and can assist in multi-planar orthosis of the spine after the vertebral body is removed; the present application can not only be used for the fixation of total vertebral body osteotomy of the thoracic and lumbar spine, but also assist in multi-planar orthosis of the spine after the vertebral body is removed. Description of the Drawings

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0025] Figure 1 is the overall assembly drawing of the fixing tool;

[0026] Figure 2 is the exploded assembly drawing of the extension sleeve assembly;

[0027] Figure 3 is the exploded assembly drawing of the upper opening connector;

[0028] Figure 4 is the exploded assembly drawing of the side opening connector;

[0029] Figure 5 is the assembly drawing of the fixing tool;

[0030] Figure 6 is the 8mm anti-rotation platform temporary fixing rod;

[0031] Figure 7 is the 10mm anti-rotation platform temporary fixing rod;

[0032] Figure 8 is the installation schematic diagram of the anti-rotation platform and the fixing rod gripper;

[0033] Figure 9 is the 12mm anti-rotation platform temporary fixing rod.

[0034] Explanation of the symbol markings in the figure:

[0035] 1. Thoracic vertebrae T7 - T9; 2. Thoracic vertebra T11 - Lumbar vertebra L1; 31. Short extension sleeve; 32. Long extension sleeve; 4. Side opening connector; 5. Upper opening connector; 6. Connecting rod; 61. Long connecting rod; 62. Short connecting rod; 71. Short temporary fixing rod; 72. Long temporary fixing rod; 8. Long extension sleeve rod; 9. Short extension sleeve rod; 101. First adjustable fixing rod gripper; 102. Second adjustable fixing rod gripper; 103. Empty slot; 11. Connector; 12. Plug; 13. Anti-rotation platform; 14. First locking knob; 15. First connecting rod fixator; 16. First locking pin; 17. Second connecting rod fixator; 18. Third connecting rod fixator; 19. First anti-disengagement pin; 20. First locking ring; 21. Second locking knob; 22. Second locking pin; 23. Fourth connecting rod fixator; 24. Second anti-disengagement pin; 25. Second locking ring; 26. Pedicle screw. Specific implementation manners

[0036] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application clearer and more understandable, the present application is further described in detail. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0037] In one of the embodiments, an external fixation tool for total vertebral osteotomy of the spinal thoracolumbar spine, such asFigure 1 and Figure 5 As shown, it includes an extension sleeve. One end of the extension sleeve close to the vertebra is connected to a temporary fixing rod through a fixing rod gripper. The other end of the extension sleeve is provided with an upper opening connector 5 and a side opening connector 4, and the upper opening connector 5 and the side opening connector 4 are connected in series with a connecting rod 6.

[0038] Specifically, the extension sleeve is divided into a short extension sleeve 31 and a long extension sleeve 32, the temporary fixing rod is divided into a short temporary fixing rod 71 and a long temporary fixing rod 72, and the connecting rod 6 is divided into a long connecting rod 61 and a short connecting rod 62; the number of the upper opening connector 5 and the side opening connector 4 is at least one, and the number of the connecting rod 6 is at least one; the lengths of the extension sleeve, the temporary fixing rod and the connecting rod 6 in the technical solution of the present application can be selected with different lengths according to the intraoperative needs, and the upper opening connector 5, the side opening connector 4 and the connecting rod 6 can be selected with different numbers according to the intraoperative needs.

[0039] As Figure 2 shown, the extension sleeve includes an extension sleeve rod, and the fixing rod gripper is arranged at one end of the extension sleeve rod. The extension sleeve rod and the fixing rod gripper are connected through a connector 11; the fixing rod gripper includes a first adjustable fixing rod gripper 101 and a second adjustable fixing rod gripper 102. An empty slot 103 is opened on the second adjustable fixing rod gripper 102. The first adjustable fixing rod gripper 101 is movably connected to the second adjustable fixing rod gripper 102 through the empty slot 103 and is fixed by a plug 12. An anti-rotation platform 13 is arranged on the temporary fixing rod, and two anti-rotation platforms 13 are arranged on each temporary fixing rod.

[0040] Specifically, the extension sleeve rod is divided into a short extension sleeve rod 9 and a long extension sleeve rod 8, and the extension sleeve rod can be selected with different lengths according to the intraoperative needs; the first adjustable fixing rod gripper 101 can be inserted into the corresponding empty slot 103 of the second adjustable fixing rod gripper 102, the position of the first adjustable fixing rod gripper 101 is adjusted according to the length of the temporary fixing rod, and is fixed by the plug 12. The first adjustable fixing rod gripper 101 and the second adjustable fixing rod gripper 102 are respectively arranged on the two anti-rotation platforms 13 and are locked and fixed with a plug.

[0041] As Figure 3 shown, the upper opening connector 5 successively includes a first locking knob 14, a first connecting rod fixer 15, a first locking pin 16, a second connecting rod fixer 17, a third connecting rod fixer 18, a first anti-disengagement pin 19 and a first locking ring 20 from top to bottom; as Figure 4 shown, the side opening connector 4 successively includes a second locking knob 21, a second locking pin 22, a fourth connecting rod fixer 23, a second anti-disengagement pin 24 and a second locking ring 25 from top to bottom.

[0042] Specifically, the first locking knob 14, the first connecting rod holder 15, the second connecting rod holder 17, and the third connecting rod holder 18 of the upper opening connector 5 are all sleeved on the first locking pin 16. The first locking knob 14 is threadedly connected to the first locking pin 16 to prevent the components from slipping out from above. The first locking ring 20 is snapped into the groove of the first locking pin 16 by elastic deformation of the metal to prevent the components from slipping out from below and to prevent the first locking ring 20 from falling off under force. The first anti-detachment pin 19 is inserted into the opening of the first locking ring 20. The second locking knob 21 of the side opening connector 4 is threadedly connected to the second locking pin 22. The fourth connecting rod holder 23 is sleeved onto the second locking pin 22 from below and is fixed by being snapped into the slot of the second locking ring 25 through the buckle at the lower end of the second locking pin 22. To prevent the second locking ring 25 from slipping out under force, the second anti-detachment pin 24 is fixed at the opening of the buckle at the lower end of the second locking pin 22.

[0043] In one embodiment, as Figure 5 shown, for different degrees of spinal deformity of the patient, the components can be flexibly used in combination. If the patient has severe scoliosis, the short extension sleeve 31 and the long extension sleeve 32 can be used in combination to provide a larger space for the instrument combination, and then the components can be assembled to achieve an ideal posture.

[0044] The specifications of the temporary fixing rod and the anti-rotation platform 13 can be selected according to the actual situation. The adjustment range of the fixing rod gripper is 12 - 20 mm. As Figure 6 shown, the width of the two anti-rotation platforms 13 is 8 mm, the distance between the two anti-rotation platforms 13 is 11 mm, and the distance between the first adjustable fixing rod gripper 101 and the second adjustable fixing rod gripper 102 is 12 mm; as Figures 7 - 8 shown, the width of the two anti-rotation platforms 13 is 10 mm, the distance between the two anti-rotation platforms 13 is 11 mm, and the distance between the first adjustable fixing rod gripper 101 and the second adjustable fixing rod gripper 102 is 15 mm; as Figure 9 shown, the width of the two anti-rotation platforms 13 is 12 mm, the distance between the two anti-rotation platforms 13 is 11 mm, and the distance between the first adjustable fixing rod gripper 101 and the second adjustable fixing rod gripper 102 is 18 mm.

[0045] Assume that the target vertebra to be resected is the thoracic vertebra T10. First, fix the short temporary fixing rod 71 to the three adjacent upper vertebrae (thoracic vertebrae T7 - T9) using the pedicle screws 26, and fix the long temporary fixing rod 72 to the three adjacent lower vertebrae (thoracic vertebra T11 - lumbar vertebra L1); then use the extension sleeve to fix to each temporary fixing rod; to ensure the stability of the relative positions of thoracic vertebrae T7 - T9 and thoracic vertebra T11 - lumbar vertebra L1, add the upper opening connectors 5 to each extension sleeve, and use the connecting rods 6 with different lengths to connect the upper opening connectors 5 in series. Finally, tighten the first locking knob 14 of the upper opening connector 5 to ensure the overall stability, and finally check the structural stability; if reinforcement is needed, the side opening connector 4 and the connecting rod 6 can be used in cooperation to further fix the extension sleeve. After the vertebra resection, remove all the upper opening connectors 5, side opening connectors 4 and connecting rods 6 on the extension sleeve, and use the remaining extension sleeve to perform multi-plane orthosis on the spine.

[0046] The present application provides an external fixation tool for total vertebral osteotomy of the thoracolumbar spine, including an extension sleeve. One end of the extension sleeve close to the vertebra is connected to the temporary fixing rod through a fixing rod gripper. The other end of the extension sleeve is provided with an upper opening connector and a side opening connector, and the upper opening connector and the side opening connector are connected in series with the connecting rod; this fixation tool is fixed by the fixing rod to ensure the stability of the relative positions of the three adjacent upper vertebrae and the three adjacent lower vertebrae during the process of vertebral resection, avoiding nerve injury; the anti-rotation platform on the fixing rod cooperates with the length-adjustable fixing rod gripper, and the fixing effect is better, which can ensure the smooth progress of the operation, and can also be combined in various forms according to the degree of spinal deformity of the patient, adapting to a variety of different cases, and has a wide application; the connectors in various forms can further play a fixing effect; the extension sleeve is adjustable and can assist in performing multi-plane orthosis on the spine after vertebral resection; the present application can not only be used for the fixation of total vertebral osteotomy of the thoracolumbar spine, but also can assist in performing multi-plane orthosis on the spine after vertebral resection.

[0047] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality" means two or more, unless otherwise specifically defined.

[0048] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. An external fixation tool for thoracic and lumbar full vertebral osteotomy, characterized in that: It comprises an extension sleeve, one end of which is close to the vertebra and is connected to a temporary fixing rod through a fixing rod holder, and the other end of which is provided with an upper opening connector and a side opening connector, which are connected in series with the rod.

2. An external fixation tool for thoracic and lumbar full vertebral osteotomy according to claim 1, characterized in that: The epitaxial sleeve comprises an epitaxial sleeve rod, the fixed rod holder is arranged at one end of the epitaxial sleeve rod, and the epitaxial sleeve rod and the fixed rod holder are connected via a connector.

3. The external fixation tool for thoracic and lumbar full vertebral osteotomy according to claim 1, characterized in that: The fixed rod holder comprises a first adjustable fixed rod holder and a second adjustable fixed rod holder, the second adjustable fixed rod holder is provided with an empty slot, the first adjustable fixed rod holder is movably connected to the second adjustable fixed rod holder through the empty slot and fixed by a screw plug.

4. The external fixation tool for thoracic and lumbar full vertebral osteotomy according to claim 1, characterized in that: An anti-rotation platform is provided on the temporary fixing rod, and the fixing rod holder is arranged on the anti-rotation platform; the width of the anti-rotation platform is 8-12 mm.

5. The external fixation tool for thoracic and lumbar full vertebral osteotomy according to claim 1, characterized in that: The upper opening connector includes, from top to bottom, a first locking knob, a first connecting rod fixer, a first locking pin, a second connecting rod fixer, a third connecting rod fixer, a first anti-drop pin and a first locking ring.

6. The external fixation tool for thoracic and lumbar full vertebral osteotomy according to claim 1, characterized in that: The side opening connector comprises, from top to bottom, a second locking knob, a second locking pin, a fourth connecting rod fixer, a second anti-drop pin and a second locking ring.

7. The external fixation tool for thoracic and lumbar full vertebral osteotomy according to claim 1, characterized in that: The number of the upper opening connector and the number of the side opening connector are at least one.

8. The external fixation tool for thoracic and lumbar full vertebral osteotomy according to claim 2, characterized in that: The temporary fixing rod is divided into a short temporary fixing rod and a long temporary fixing rod, the epitaxial sleeve is divided into a short epitaxial sleeve and a long epitaxial sleeve, and the epitaxial sleeve rod is divided into a short epitaxial sleeve rod and a long epitaxial sleeve rod.

9. The external fixation tool for thoracic and lumbar full vertebral osteotomy according to claim 1, characterized in that: The connecting rod is divided into a long connecting rod and a short connecting rod.

10. The external fixation tool for thoracic and lumbar full vertebral osteotomy according to claim 1, characterized in that: The number of the connecting rod is at least one.

Images