Expansion type interbody fusion cage applied to minimally invasive spine surgery

Abstract

The invention discloses an expansion type interbody fusion cage applied to a minimally invasive spine surgery, and relates to the technical field of medical instruments, the expansion type interbody fusion cage applied to the minimally invasive spine surgery comprises a fixing frame, an adjustable clamping assembly is rotatably arranged on the inner wall of the fixing frame and used for supporting and fixing the intervertebral space of a patient, and the clamping assembly is used for clamping the intervertebral space of the patient; the stability of the vertebral body is improved; adjusting assemblies capable of sliding are arranged at the two ends of the fixing frame and used for adjusting the height of the clamping assemblies so that the clamping assemblies can be matched with the vertebral gap of the patient. According to the expansion type interbody fusion cage applied to the minimally invasive spine surgery, the rotating frame, the fixing column and the conical nails are matched with one another, the two conical nails are used for adjustment, the interbody fusion cage can be matched with a vertebral body gap of a patient, and therefore the practicability and flexibility of the interbody fusion cage are greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to an expandable intervertebral fusion device for minimally invasive spinal surgery. Background Art

[0002] An expandable intervertebral fusion device for minimally invasive spinal surgery is a medical device used for spinal fusion surgery, mainly for treating spinal diseases such as lumbar spondylolisthesis and intervertebral disc degenerative diseases. This fusion device is implanted through minimally invasive surgery and expands in the body to restore the height of the intervertebral space, thereby achieving vertebral body stability; the endoscopic expandable fusion device has the function of expanding from 8 mm to 13 mm, is suitable for endoscopic fusion and open surgery, and the design allows implantation through the posterior or lateral posterior approach or through the endoscopic channel during minimally invasive surgery. It has good stability and can provide a large bone grafting space for treating lumbar disc herniation and lumbar instability through small fenestration implantation posteriorly, and combined with the pedicle screw system for treating degenerative lumbar diseases.

[0003] Currently, when most expandable intervertebral fusion devices for minimally invasive spinal surgery are in use, due to the different vertebral body spaces of different patients, there is a problem that the size of traditional intervertebral fusion devices is difficult to match the vertebral body space of patients during use, resulting in loosening of the intervertebral fusion device after implantation in patients, causing lumbar instability, and thus affecting the recovery of patients.

[0004] Therefore, those skilled in the art have provided an expandable intervertebral fusion device for minimally invasive spinal surgery to solve the problems raised in the above background art. Summary of the Invention

[0005] The main purpose of the present invention is to provide an expandable intervertebral fusion device for minimally invasive spinal surgery. Through the mutual cooperation among the rotating frame, the fixed column and the taper pins, and by adjusting with two taper pins, the intervertebral fusion device can be matched with the vertebral body space of the patient, thereby greatly improving its practicability and flexibility.

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

[0007] An expandable intervertebral fusion device for minimally invasive spinal surgery, including a fixed frame, wherein an adjustable clamping assembly is rotatably arranged on the inner wall of the fixed frame for supporting and fixing the patient's intervertebral space to improve the stability of the vertebral body;

[0008] Adjusting assemblies that can slide are arranged at both ends of the fixed frame for adjusting the height of the clamping assembly to make it coincide with the vertebral body space of the patient.

[0009] Through the above technical solution, by sliding the adjustment component to squeeze the clamping component, the clamping component can be rotated, and medical staff can flexibly adjust according to the vertebral space of the patient, so as to manufacture an intervertebral fusion device matching the vertebral space of the patient.

[0010] Preferably, the clamping component includes two rotating frames rotatably arranged on the inner wall of the fixed frame, which are used to adjust the overall height to make it match the vertebral space of the patient. Both ends of the rotating frame are connected with fixing columns, and conical pins are arranged at the parts of the outer surface of the fixing columns that are in contact with the vertebral bodies.

[0011] Through the above technical solution, through the mutual cooperation among the rotating frame, the fixing column and the conical pin, the vertebral body of the patient can be better supported.

[0012] Preferably, the adjustment component includes tapered blocks penetrating through both ends of the fixed frame, which play a pushing role. Limit blocks are arranged on both sides of the tapered blocks to limit the tapered blocks. Grooves are arranged at one end of each tapered block, and screws are arranged at the bottom of each groove.

[0013] Through the above technical solution, by squeezing the fixing column with the tapered block, the rotating frame can be rotated, thus realizing the adjustment.

[0014] Preferably, fixing blocks are arranged at the middle positions of the inner walls of the fixed frame. The fixing blocks are provided with two threaded grooves, and the two threaded grooves are respectively connected in a matching manner with the corresponding screws.

[0015] Through the above technical solution, through the threaded grooves, the position of the tapered block can be adjusted under the action of the screws.

[0016] Preferably, a set of limit grooves are arranged at both ends of the fixed frame, and the two sets of limit grooves are respectively engaged with the corresponding limit blocks in a clamping manner.

[0017] Through the above technical solution, the limiting function can be realized by using the limit grooves.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] In the present invention, under the mutual cooperation of the limit blocks and the limit grooves, by sliding the arranged tapered block to squeeze the clamping component, the rotating frame is rotated. Medical staff rotate the screws to make the tapered block move towards the middle, so that the fixing column and the conical pin support the upper and lower vertebral bodies, and thus can be flexibly adjusted according to the vertebral space of the patient to manufacture an intervertebral fusion device matching the vertebral space of the patient, greatly improving the practicability and flexibility of the intervertebral fusion device. Description of the Drawings

[0020] Figure 1Schematic diagram of the overall structure of the present invention;

[0021] Figure 2 Schematic diagram of the partial structure of the present invention;

[0022] Figure 3 Schematic diagram of the adjustment component structure of the present invention;

[0023] Figure 4 Schematic diagram of the clamping component structure of the present invention;

[0024] Figure 5 Schematic diagram of the orientation structure of the clamping component of the present invention.

[0025] In the figure: 1, fixed frame; 2, fixed block; 3, adjustment component; 4, tapered block; 5, screw; 6, limit block; 7, rotating frame; 8, fixed column; 9, taper pin; 10, limit groove; 11, thread groove; 12, clamping component; 13, groove. Specific embodiments

[0026] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0027] Embodiment: As Figures 1-5 shown, an expandable intervertebral fusion device applied to minimally invasive spinal surgery includes a fixed frame 1. An adjustable clamping component 12 is rotatably arranged on the inner wall of the fixed frame 1, which is used to support and fix the patient's intervertebral space to improve the stability of the vertebral body;

[0028] Adjustment components 3 that can slide are arranged at both ends of the fixed frame 1, which are used to adjust the height of the clamping component 12 so that it matches the patient's vertebral body space. By sliding the set adjustment component 3 to squeeze the clamping component 12, the clamping component 12 can be rotated, and medical staff can flexibly adjust according to the patient's vertebral body space, so as to manufacture an intervertebral fusion device that matches the patient's vertebral body space.

[0029] The clamping component 12 includes two rotating frames 7 rotatably arranged on the inner wall of the fixed frame 1, which are used to adjust the overall height to make it match the patient's vertebral body space. Fixed columns 8 are connected to both ends of the rotating frame 7. Taper pins 9 are arranged on the parts of the outer surface of the fixed column 8 that are in contact with the vertebral body. Through the mutual cooperation of the rotating frame 7, the fixed column 8 and the taper pin 9, the vertebral body of the patient can be better supported.

[0030] The adjusting assembly 3 includes tapered blocks 4 penetrating through both ends of the fixing frame 1, which play a pushing role. Limit blocks 6 are arranged on both sides of the tapered blocks 4 to limit the tapered blocks 4. Grooves 13 are arranged at one end of each tapered block 4, and screws 5 are arranged at the inner bottoms of the grooves 13. By squeezing the fixed columns 8 with the tapered blocks 4, the rotating frame 7 is rotated, thereby realizing adjustment.

[0031] Fixed blocks 2 are arranged at the middle positions of the inner walls of the fixing frame 1. The fixed blocks 2 are provided with two threaded grooves 11, and the two threaded grooves 11 are respectively connected in a matching manner with the corresponding screws 5. Through the threaded grooves 11, under the action of the screws 5, the positions of the tapered blocks 4 can be adjusted.

[0032] A set of limit grooves 10 are arranged at both ends of the fixing frame 1, and the two sets of limit grooves 10 are respectively engaged with the corresponding limit blocks 6 in a clamping manner. The limit grooves 10 can be used to realize the limiting function.

[0033] Working principle: When the present invention is in use, first, the vertebral body space of the patient is cleaned up. Subsequently, the vertebral body fragments of the patient are placed in the middle of the fusion device. First, the height of one end is adjusted so that the lowest height matches the space. Subsequently, the fusion device is placed in the vertebral body space. By rotating the screw 5, under the action of the fixed block 2 and the threaded groove 11, the tapered block 4 moves towards the middle, thereby squeezing the two fixed columns 8 at one end, causing the rotating frame 7 to rotate. Under the action of the tapered screw 9, the vertebral body can be supported.

Claims

1. An expandable intervertebral fusion device for use in minimally invasive spinal surgery, comprising a fixing frame (1), characterized in that: The inner wall of the fixing frame (1) is rotatably provided with an adjustable clamping assembly (12) for supporting and fixing the patient's intervertebral space to improve the stability of the vertebral body; Both ends of the fixing frame (1) are provided with slidable adjustment components (3) for adjusting the height of the clamping component (12) so as to match the vertebral space of the patient.

2. The expandable intervertebral fusion cage used in minimally invasive spinal surgery according to claim 1, characterized in that: The clamping assembly (12) comprises two rotating frames (7) rotatably arranged on the inner wall of the fixing frame (1) and used for adjusting the overall height so as to match the intervertebral space of the patient. Both ends of the rotating frame (7) are connected to fixing columns (8), and the outer surface of the fixing column (8) is provided with a cone nail (9) at the position where it fits between the vertebrae.

3. The expandable intervertebral fusion device used in minimally invasive spinal surgery according to claim 1, characterized in that: The adjustment assembly (3) comprises a conical block (4) which is arranged through both ends of the fixing frame (1) and plays a pushing role. Limiting blocks (6) are arranged on both sides of the conical block (4) for limiting the position of the conical block (4). A groove (13) is arranged at one end of the conical block (4), and a screw (5) is arranged at the bottom of the groove (13).

4. The expandable intervertebral fusion device used in minimally invasive spinal surgery according to claim 1, characterized in that: A fixing block (2) is provided at the middle position of the inner wall of the fixing frame (1), and the fixing block (2) is provided with two thread grooves (11), and the two thread grooves (11) are matched and connected with corresponding screws (5) respectively.

5. The expandable intervertebral fusion cage used in minimally invasive spinal surgery according to claim 1, characterized in that: A group of limiting grooves (10) are provided at both ends of the fixing frame (1), and the two groups of limiting grooves (10) are respectively engaged with corresponding limiting blocks (6).

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