A fusion device retriever

Abstract

The utility model provides a kind of interbody fusion cage extractor, belong to medical instrument technical field.The utility model provides a kind of interbody fusion cage extractor, including take out stem and front pressure rod, take out stem inside is provided with accommodating space, the opening of accommodating space is arranged at the tail end of take out stem, front pressure rod is arranged in accommodating space, and it has the freedom of movement in accommodating space, the side wall of take out stem is provided with clamping strip, clamping strip is close to the front end of take out stem and is provided with the freedom of movement to the outside sliding of accommodating space, front pressure component is arranged between clamping strip and the front end of front pressure rod, press front pressure rod, front pressure component drives clamping strip to move to the outside of accommodating space, realize the locking of clamping strip to interbody fusion cage.The utility model provides a kind of interbody fusion cage extractor, take out stem is placed from the tail end of interbody fusion cage, front pressure rod is pushed forward, clamping strip enters the inner side wall of interbody fusion cage, improves the stability of holding, not easy to slip in the process of knocking.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology, specifically relating to a fusion device extractor. Background Technology

[0002] Severe spinal disorders often lead to spinal instability, causing neck and back pain, and nerve compression resulting in sensory and motor impairments in the limbs. In some spinal surgeries, interbody fusion cages are generally required to restore the physiological height of the affected vertebra and maintain vertebral stability. Interbody fusion cages are internal fixation devices used clinically to treat lumbar instability. They have advantages such as corrosion resistance and good tissue compatibility. The compressive strength, fatigue tolerance, and biomechanical properties of interbody fusion cages meet the physiological requirements of the human body. Interbody fusion cages are usually made of a single structure of high-molecular polymer material. To reduce overall weight and facilitate vertebral bone fusion and regeneration, bone graft grooves are usually created between one or more pairs of opposing surfaces. Bone grafts are placed in these grooves to promote bone growth and shorten fusion time. During implantation, the interbody fusion cage may not be properly positioned, requiring removal. However, existing removal devices are prone to slippage and instability during removal, prolonging the surgery time. Utility Model Content

[0003] The purpose of this utility model is to provide a fusion device extractor, which aims to solve the problem that the extractor is prone to unstable clamping and slippage when removing the intervertebral fusion device.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A fusion device removal tool is provided, including a removal rod and a front pressure rod. The removal rod has an internal receiving space, the opening of which is located at the tail end of the removal rod. The front pressure rod passes through the receiving space and has the freedom to move within it. A locking strip is provided on the side wall of the removal rod, located near the front end of the removal rod and having the freedom to slide out of the receiving space. A front pressure assembly is provided between the locking strip and the front end of the front pressure rod. Pressing the front pressure rod causes the front pressure assembly to move the locking strip out of the receiving space, thereby locking the interbody fusion device in place.

[0005] In one possible implementation, a mounting plate is provided on the inner side of the mounting strip, the mounting plate is located within the receiving space, and a front pressure block is provided at the front end of the front pressure rod. When the front pressure rod is pushed forward, the front end of the front pressure block is pushed into the side of the mounting plate away from the mounting strip, thereby causing the mounting strip to move out of the receiving space.

[0006] In one possible implementation, a first guide slope is provided on the side of the clamping plate away from the clamping strip, the first guide slope is provided at the end of the clamping plate near the take-out rod, and a second guide slope is provided on the front end of the front pressure block near the side wall of the clamping strip, the first guide slope and the second guide slope are matched.

[0007] In one possible implementation, the two sets of the mounting strips are symmetrically arranged inside the extraction rod.

[0008] In one possible implementation, a sidewall push spring is provided between the mounting plate and the sidewall of the receiving space, and the front end of the front pressure rod is located between the two sets of mounting plates.

[0009] In one possible implementation, the sidewall of the front pressure block is provided with a receiving groove suitable for accommodating the mounting plate.

[0010] In one possible implementation, the tail end of the extraction rod is provided with a grip, the tail end of the grip is provided with a rotating groove, the tail end of the extraction rod is provided with a rotating cylinder, the opening of the rotating cylinder faces forward and is inserted into the rotating groove, the two are threadedly connected, the rotating cylinder has the degree of freedom to move within the rotating groove, and the tail end of the front pressure rod is rotatably connected to the bottom of the rotating cylinder.

[0011] In one possible implementation, a limiting seat is provided at the tail end of the grip, and a limiting top block is provided on the front side wall of the rotating cylinder, the limiting top block being able to abut against the front surface of the limiting seat.

[0012] In one possible implementation, the sidewall of the extraction rod is provided with abutment blocks, and two sets of abutment blocks are respectively provided on the left and right sides of the extraction rod. The abutment blocks are used to abut against the tail end of the intervertebral fusion device.

[0013] In one possible implementation, the tail end of the extraction rod is provided with a striking pad.

[0014] The beneficial effects of the fusion extractor provided by this utility model are as follows:

[0015] Compared to existing technologies, this design includes a removal rod and a forward compression rod. The removal rod has an internal receiving space and an opening at its tail end. The front end of the removal rod matches the shape of the bone graft groove in the interbody fusion device and is inserted into the groove. A retaining strip is slidably mounted on the side wall of the removal rod, positioned at its front end, and matches a groove on the inner wall of the bone graft groove in the interbody fusion device. The forward compression rod passes through the receiving space of the removal rod and has the freedom to slide within it. The retaining strip and the forward compression rod... A front-pressing component is provided between the front ends of the pressure rod. In the initial state, the front-pressing rod does not exert force on the clamping strip, and the clamping strip is stored in the side wall and inside the receiving space. In the use state, the front end of the removal rod is inserted into the bone graft groove of the interbody fusion device, and the front-pressing rod is pushed forward. The front-pressing component drives the clamping strip to move outward from the removal rod. The clamping strip enters the inner wall groove of the bone graft groove of the interbody fusion device, thereby locking the interbody fusion device, increasing the stability of the locking, preventing slippage during use, and facilitating the removal of the interbody fusion device. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a front view of the fusion extractor provided in an embodiment of the present invention.

[0018] Figure 2 Schematic diagram of the internal structure of the fusion clamping and extracting device provided in the initial state according to an embodiment of this utility model. Figure 1 ;

[0019] Figure 3 for Figure 2 A magnified view of a portion of the image;

[0020] Figure 4 Schematic diagram of the internal structure of the fusion clamping and extracting device provided in the embodiment of this utility model in use. Figure 2 ;

[0021] Figure 5 for Figure 4 A magnified view of a portion of the image.

[0022] In the diagram: 1. Removal rod; 2. Clamping strip; 3. Clamping plate; 4. First guide ramp; 5. Side wall push spring; 6. Front pressure rod; 7. Front pressure block; 8. Second guide ramp; 9. Grip handle; 10. Rotating cylinder; 11. Limiting seat; 12. Limiting top block; 13. Striking pad; 14. Abutment block; 15. Positioning groove. Detailed Implementation

[0023] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0024] Please refer to Figures 1 to 5 The present invention provides a specific embodiment of a fusion device removal device, comprising a removal rod 1 and a front pressure rod 6. The removal rod 1 has an internal receiving space with an opening at the tail end. The front pressure rod 6 passes through the receiving space and has the freedom to move within it. A locking strip 2 is provided on the side wall of the removal rod 1, located near the front end of the removal rod 1 and having the freedom to slide out of the receiving space. A front pressure assembly is provided between the locking strip 2 and the front end of the front pressure rod 6. Pressing the front pressure rod 6 causes the front pressure assembly to move the locking strip 2 out of the receiving space, thereby locking the intervertebral fusion device.

[0025] This utility model provides a fusion cage removal device, which, compared with the prior art, includes a removal rod 1 and a front pressure rod 6. The removal rod 1 has an internal receiving space, an opening at its tail end, and its front end matches the shape of the bone graft groove of the intervertebral fusion cage. The front end of the removal rod 1 is used to insert into the bone graft groove of the intervertebral fusion cage. A retaining strip 2 is slidably disposed on the side wall of the removal rod 1, located at the front end of the removal rod 1, and matches the inner wall retaining groove of the inner side wall of the bone graft groove of the intervertebral fusion cage. The front pressure rod 6 passes through the receiving space of the removal rod 1 and has the ability to slide within the receiving space. The interbody fusion device has a front-pressure component between the locking strip 2 and the front pressure rod 6. In the initial state, the front pressure rod 6 does not exert any force on the locking strip 2, and the locking strip 2 is stored in the side wall and inside the receiving space. In the use state, the front end of the removal rod 1 is inserted into the bone graft groove of the interbody fusion device, and the front pressure rod 6 is pushed forward. The front pressure component drives the locking strip 2 to move outward from the removal rod 1. The locking strip 2 enters the inner wall slot of the bone graft groove of the interbody fusion device, thereby locking the interbody fusion device, increasing the stability of the locking, preventing slippage during use, and facilitating the removal of the interbody fusion device.

[0026] For details, please refer to Figures 1 to 5Defined as the width direction (left-right) and the length direction (front-back), the device includes a removal rod 1 and a front pressure rod 6. The removal rod 1 has an internal receiving space. The front pressure rod 6 passes through the receiving space from the opening at the tail end and has the freedom to slide along the length direction of the removal rod 1. The locking strip 2 is slidably disposed on the side wall of the removal rod 1 and has the freedom to slide perpendicular to the length direction of the removal rod 1. Under normal conditions, the locking strip 2 is located inside the removal rod 1. In use, pushing the front pressure rod 6 causes the front pressure assembly to move the locking strip 2 out of the receiving space. The locking strip 2 enters the inner wall slot of the bone graft groove of the interbody fusion device, thereby locking the interbody fusion device, increasing the stability of the locking, preventing slippage of the sliding hammer during hammering, and facilitating the removal of the interbody fusion device.

[0027] As a specific embodiment of the fusion extractor provided by this utility model, please refer to Figures 1 to 5 A mounting plate 3 is provided on the inner side of the mounting strip 2. The mounting plate 3 is located in the receiving space. A front pressure block 7 is provided at the front end of the front pressure rod 6. When the front pressure rod 6 is pushed forward, the front end of the front pressure block 7 is pushed into the side of the mounting plate 3 away from the mounting strip 2, which drives the mounting strip 2 to move out of the receiving space.

[0028] For details, please refer to Figures 1 to 5 The clamping plate 3 is located inside the clamping strip 2 and within the receiving space. The clamping plate 3 prevents the clamping strip 2 from falling out of the extraction rod 1. The front end of the front pressure rod 6 is provided with a front pressure block 7. The clamping plate 3 is located away from the inner wall of the extraction rod 1. When the front pressure rod 6 is pushed forward, the front pressure block 7 enters the side of the clamping plate 3 away from the clamping strip 2. As the front pressure block 7 goes deeper, it pushes the clamping strip 2 out of the side wall of the extraction rod 1. The clamping strip 2 moves out of the receiving space, thereby locking the interbody fusion device.

[0029] As a specific embodiment of the fusion extractor provided by this utility model, please refer to Figures 1 to 5 A first guide slope 4 is provided on the side of the mounting plate 3 away from the mounting strip 2. The first guide slope 4 is provided at the end of the mounting plate 3 near the take-out rod 1. A second guide slope 8 is provided on the front end of the front pressure block 7 near the side wall of the mounting strip 2. The first guide slope 4 and the second guide slope 8 are matched.

[0030] For details, please refer to Figures 1 to 5The first guide slope 4 is located on the side of the clamping plate 3 away from the clamping strip 2 and on the rear side of the clamping strip 2. As it moves further away from the clamping strip 2, the thickness of the clamping plate 3 gradually decreases. The front end of the front pressure block 7 is provided with a second guide slope 8, which is located on the side close to the clamping plate 3. The first guide slope 4 matches the second guide slope 8. As the front pressure block 7 gradually moves forward, it pushes the clamping strip 2 out of the side wall of the extraction rod 1, thereby locking the intervertebral fusion device. The inner side wall of the front end of the extraction rod 1 is provided with a positioning groove 15, which matches the front end of the front pressure block 7, increasing the stability of the device during use.

[0031] As a specific embodiment of the fusion extractor provided by this utility model, please refer to Figures 1 to 5 Two sets of locking strips 2 are symmetrically arranged inside the extraction rod 1.

[0032] For details, please refer to Figures 1 to 5 The clamping strip 2 is provided in two sets, which are symmetrically arranged inside the take-out rod 1 to increase the stability of clamping. Correspondingly, the front pressure block 7 is arranged between the two sets of clamping plates 3.

[0033] As a specific embodiment of the fusion extractor provided by this utility model, please refer to Figures 1 to 5 A sidewall push spring 5 is provided between the mounting plate 3 and the sidewall of the accommodating space, and the front end of the front pressure rod 6 is located between the two sets of mounting plates 3.

[0034] For details, please refer to Figures 1 to 5 The side wall pushing spring 5 is located between the mounting plate 3 and the side wall of the receiving space, and is located behind the mounting strip 2. The side wall of the receiving space is provided with a spring groove for accommodating the side wall pushing spring 5. The side wall pushing spring 5 has the force to push the mounting plate 3 away from the side wall of the receiving space. The front end of the front pressure block 7 is located between the two sets of mounting plates 3, which facilitates the front pressure block 7 to push the mounting plate 3 to move towards the side wall of the receiving space.

[0035] As a specific embodiment of the fusion extractor provided by this utility model, please refer to Figures 1 to 5 The side wall of the front pressure block 7 is provided with a receiving groove suitable for accommodating the mounting plate 3.

[0036] For details, please refer to Figures 1 to 5 The receiving groove is set on the side wall of the front pressure block 7, and there are two sets, which are respectively set on the left and right sides of the front pressure block 7. During use, the front pressure rod 6 moves forward, and the front pressure block 7 pushes the clamping plate 3 to the side wall of the receiving space. The front pressure block 7 continues to move forward to the front end of the receiving space. At this time, the clamping plate 3 is located in the receiving groove. The front pressure block 7 limits the clamping plate 3 to the side wall of the receiving space, increasing the stability of the device.

[0037] As a specific embodiment of the fusion extractor provided by this utility model, please refer to Figures 1 to 5 The tail end of the take-out rod 1 is provided with a grip 9, the tail end of the grip 9 is provided with a rotating groove, the tail end of the take-out rod 1 is provided with a rotating cylinder 10, the opening of the rotating cylinder 10 faces forward and is inserted into the rotating groove, the two are threaded together, the rotating cylinder 10 has the freedom to move in the rotating groove, and the tail end of the front pressure rod 6 is rotatably connected to the bottom of the rotating cylinder 10.

[0038] For details, please refer to Figures 1 to 5 The handle 9 is located at the end of the take-up lever 1 for easy gripping. The rotating groove is located at the end of the handle 9, with the opening of the rotating groove facing the end. The opening of the rotating cylinder 10 faces forward and is inserted into the rotating groove. The rotating cylinder 10 is threadedly connected to the rotating groove. When the rotating cylinder 10 is rotated, it moves forward within the rotating groove. The end of the front pressure lever 6 is rotatably located at the bottom of the rotating cylinder 10. Changing the rotation direction of the rotating cylinder 10 changes its position, thereby driving the front pressure lever 6 to move forward and backward.

[0039] As a specific embodiment of the fusion extractor provided by this utility model, please refer to Figures 1 to 5 A limiting seat 11 is provided at the tail end of the grip 9, and a limiting top block 12 is provided on the front side wall of the rotating cylinder 10. The limiting top block 12 can abut against the front surface of the limiting seat 11.

[0040] For details, please refer to Figures 1 to 5 The limiting seat 11 is located at the tail end of the grip handle 9. The limiting seat 11 is provided with a limiting ring groove. The rotating cylinder 10 passes through the limiting ring groove. The limiting top block 12 is located on the inner side of the front side wall of the rotating cylinder 10. The thickness of the front side wall of the rotating cylinder 10 and the thickness of the limiting top block 12 are greater than the width of the limiting ring groove. The limiting top block 12 is located on the front side of the limiting seat 11. The limiting seat 11 prevents the rotating cylinder 10 from coming out of the grip handle 9 during use.

[0041] As a specific embodiment of the fusion extractor provided by this utility model, please refer to Figures 1 to 5 The side wall of the extraction rod 1 is provided with abutment blocks 14. Two sets of abutment blocks 14 are respectively provided on the left and right sides of the extraction rod 1. The abutment blocks 14 are used to abut against the tail end of the intervertebral fusion device.

[0042] For details, please refer to Figures 1 to 5 The abutment block 14 is set on the side wall of the extraction rod 1 and the rear side of the clamping strip 2. The two sets of abutment blocks 14 are respectively set on the left and right sides of the extraction rod 1. When the extraction rod 1 is inserted into the intervertebral fusion device, the front side wall of the abutment block 14 abuts against the tail end of the intervertebral fusion device, increasing the stability of the device.

[0043] As a specific embodiment of the fusion extractor provided by this utility model, please refer to Figures 1 to 5 A striking pad 13 is provided at the end of the rod 1.

[0044] For details, please refer to Figures 1 to 5 The striking pad 13 is located at the tail end of the rotating cylinder 10 and is used to buffer the impact of the sliding hammer.

[0045] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A fusion extractor, characterized in that, The device includes a removal rod and a front pressure rod. The removal rod has an internal receiving space with an opening at its tail end. The front pressure rod passes through the receiving space and has the freedom to move within it. A locking strip is provided on the side wall of the removal rod, located near the front end of the removal rod and having the freedom to slide out of the receiving space. A front pressure assembly is provided between the locking strip and the front end of the front pressure rod. Pressing the front pressure rod causes the front pressure assembly to move the locking strip out of the receiving space, thereby locking the interbody fusion device in place.

2. The fusion extractor as described in claim 1, characterized in that, A mounting plate is provided on the inner side of the mounting strip, and the mounting plate is located in the receiving space. A front pressure block is provided at the front end of the front pressure rod. When the front pressure rod is pushed forward, the front end of the front pressure block is pushed into the side of the mounting plate away from the mounting strip, thereby driving the mounting strip to move out of the receiving space.

3. The fusion extractor as described in claim 2, characterized in that, The clamping plate has a first guide slope on the side away from the clamping strip. The first guide slope is located at the end of the clamping plate near the extraction rod. The front end of the front pressure block has a second guide slope on the side wall near the clamping strip. The first guide slope matches the second guide slope.

4. A fusion extractor as described in claim 2, characterized in that, The two sets of mounting strips are symmetrically arranged inside the extraction rod.

5. A fusion extractor as described in claim 4, characterized in that, A sidewall push spring is provided between the mounting plate and the sidewall of the receiving space, and the front end of the front pressure rod is located between the two sets of mounting plates.

6. A fusion extractor as described in claim 5, characterized in that, The side wall of the front pressure block is provided with a receiving groove suitable for accommodating the mounting plate.

7. A fusion extractor as described in claim 1, characterized in that, The tail end of the extraction rod is provided with a grip, the tail end of the grip is provided with a rotating groove, the tail end of the extraction rod is provided with a rotating cylinder, the opening of the rotating cylinder faces forward and is inserted into the rotating groove, the two are threadedly connected, the rotating cylinder has the freedom to move within the rotating groove, and the tail end of the front pressure rod is rotatably connected to the bottom of the rotating cylinder.

8. A fusion extractor as described in claim 7, characterized in that, The end of the grip is provided with a limiting seat, and the front side wall of the rotating cylinder is provided with a limiting top block, which can abut against the front surface of the limiting seat.

9. A fusion extractor as described in claim 1, characterized in that, The side wall of the extraction rod is provided with abutment blocks, and two sets of abutment blocks are respectively provided on the left and right sides of the extraction rod. The abutment blocks are used to abut against the tail end of the intervertebral fusion device.

10. A fusion extractor as described in claim 1, characterized in that, The tail end of the extraction rod is provided with a striking pad.

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