A fusion device deployment spreader

Abstract

This utility model relates to a fusion device placement and expansion device, comprising a fixed sleeve and an expansion sleeve, both with arc-shaped cross-sections and oppositely positioned arc openings. The expansion sleeve is threaded onto an adjusting bracket, and a locking screw is externally threaded onto the adjusting bracket, abutting and locking the expansion sleeve. A fixed base plate is integrally connected to the upper end of the fixed sleeve, and a guide post is vertically connected to the fixed base plate facing the expansion sleeve. The guide post slides and guides the adjusting bracket. An adjusting bolt parallel to the guide post is also threaded onto the fixed base plate, and the adjusting bolt is rotatable and axially positioned on the fixed base plate, with its threads threaded onto the adjusting bracket. The fixed sleeve and expansion sleeve, with their arc-shaped relative fit, drive the adjusting bracket via threads to move the expansion sleeve away from the fixed sleeve, achieving an outward expansion incision. This method is convenient and stable, and poses no risk of injury to the human body when the fusion device is implanted between the fixed sleeve and the expansion sleeve, resulting in high surgical convenience, stability, and safety.

Description

Technical Field

[0001] This utility model relates to a medical device, specifically a fusion device placement and expansion device. Background Technology

[0002] In spinal surgeries, fusion cages are typically used to achieve intervertebral bony fusion and restore spinal structure and function. The fusion cage is implanted through a surgical incision. Due to the limitations of the surgical incision, the incision needs to be widened during implantation. The traditional method of widening the incision involves manually pulling outwards with two relatively outward-expanding support plates. These support plates are prone to damaging the incision and the tissues beneath it. Furthermore, when implanting the fusion cage between the outward-expanding support plates, there is no effective protection for the movement of the fusion cage, which also poses the risk of implantation damage to the incision and tissues. The operation is extremely unstable, unsafe, and inconvenient. Summary of the Invention

[0003] This utility model provides a fusion device placement expander that is simple in structure, easy to use and adjust, stable, and can effectively protect the incision and prevent accidental damage during the implantation of the fusion device, thus ensuring high safety.

[0004] The technical solution adopted by this utility model is as follows: a fusion device placement and expansion device, comprising a fixed sleeve and an expansion sleeve, both with arc-shaped cross sections and oppositely arranged arc openings, characterized in that: the expansion sleeve is threaded onto an adjusting frame, and a locking screw is externally threaded onto the adjusting frame, the locking screw abutting against and locking the expansion sleeve; a fixed base plate is integrally connected to the upper end of the fixed sleeve, and a guide post is vertically connected to the side of the fixed base plate facing the expansion sleeve, the guide post slides and guides through the adjusting frame, and an adjusting bolt parallel to the guide post is also threaded onto the fixed base plate, the adjusting bolt being rotatable and axially positioned on the fixed base plate, and the adjusting bolt is threadedly threaded onto the adjusting frame.

[0005] The fixed base plate is provided with an adjustment hole or groove. The inner wall of the adjustment hole or groove is provided with a stop head perpendicular to the direction of the guide column. The head of the adjustment bolt is a section with a reduced diameter. The section with a reduced diameter passes through the stop head. The outer end of the section with a reduced diameter is threaded and locked to a limiting head. The limiting head overlaps with the stop head in the axial direction of the adjustment bolt.

[0006] A fusion device placement and expansion device includes a fixed sleeve and an expansion sleeve, both with arc-shaped cross-sections and oppositely arranged arc openings. The expansion sleeve is vertically connected to an adjusting base, and the adjusting base is externally fitted with a threaded locking screw that abuts against and locks the expansion sleeve. A fixed base plate is integrally connected to the upper end of the fixed sleeve. A guide post is vertically connected to the fixed base plate facing the expansion sleeve. The guide post slides through the adjusting base. An adjusting bolt is parallel to the guide post and passes through both the fixed base plate and the adjusting base. The adjusting bolt spirally passes through the fixed base plate and the adjusting base via threaded sections with opposite directions of rotation, facing both the fixed base plate and the adjusting base.

[0007] The adjusting bolt has a rotating handle at one end on the side of the sleeve that is being opened.

[0008] The upper end of the spreading sleeve is connected to a horizontal handrail that faces away from the fixed sleeve.

[0009] The handrail and the fixing sleeve are integrally stamped.

[0010] The adjusting bracket includes a sleeve plate and an adjusting plate. The adjusting plate is connected to one side of the sleeve bracket. The guide column slides through the adjusting plate. The adjusting bolt is threaded onto the adjusting plate. The sleeve plate is provided with an arc-shaped opening that fits and opens the outer side of the sleeve. A locking screw is screwed onto the sleeve plate. The two outer openings of the arc-shaped opening are respectively provided with two clamps that clamp and open the arc-shaped end of the sleeve.

[0011] The locking screw is oriented through the center of the sleeve and parallel to the adjusting bolt.

[0012] The lower end of the fixed sleeve and / or the spreading sleeve is set in an inverted triangular shape with a blunt head.

[0013] The fixed base plate is formed by stamping a fixed sleeve as a whole.

[0014] This invention employs a fixed sleeve and a spreading sleeve in an arc-shaped relative fit, which facilitates insertion into the incision. By adjusting the adjusting bolt, guided by the guide post, the threaded drive adjustment seat moves the spreading sleeve away from the fixed sleeve to expand the incision. The operation is convenient and stable. When the fusion device is implanted between the fixed sleeve and the spreading sleeve, there is no risk of damage to the human incision or the tissue below the incision. The overall surgical convenience, stability and safety are high. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 for Figure 1 Left view; Figure 3 for Figure 1 Enlarged structural diagram at point A in the middle; Figure 4 This is a schematic diagram of the adjustable seat structure.

[0016] In the diagram: 1. Fixed sleeve; 2. Fixed base plate; 3. Guide post; 4. Bolt through hole; 5. Stop; 6. Adjusting bolt; 7. Reduction section; 8. Rotating handle head; 9. Spreading sleeve; 10. Handrail plate; 11. Sleeve plate; 12. Adjusting plate; 13. Arc-shaped opening; 14. Clamp head; 15. Locking screw; 16. Limiting head. Detailed Implementation

[0017] The following explanation, in conjunction with the accompanying drawings, will provide further details.

[0018] Figure 1-3 As shown: A fusion device placement and expansion device includes a fixed sleeve 1, an expansion sleeve 9, and an adjusting bracket, all with arc-shaped cross-sections and oppositely arranged arc openings. The fixed sleeve 1 is integrally formed with a fixed base plate 2, on which a guide post 3 is vertically connected. The fixed base plate 2 has bolt through holes 4, and a stop 5 is installed within each bolt through hole 4. The upper end of the expansion sleeve 9 is connected to a horizontal handrail plate 10 facing away from the fixed sleeve 1. The outer arc of the expansion sleeve 9 fits against the arc-shaped opening 13 within a connecting plate 11. Clips 14 are provided at both ends of the arc-shaped opening 13 to limit the movement of the arc-shaped opening of the expansion sleeve 9. Locking screws 15 are threaded through the outer side of the connecting plate 11 to abut against a locking support. The sleeve 9 is connected to the sleeve plate 11, which is externally connected or integrated with the adjusting plate 12. The adjusting plate 12 corresponds to the fixed seat plate 2. The guide post 3 slides through the adjusting plate 12. The adjusting plate 12 is threaded with the adjusting bolt 6. The adjusting bolt is externally connected to the rotating handle head 8 at one end of the sleeve. The section of the adjusting bolt corresponding to the fixed seat plate is set as a diameter reduction section 7. The diameter reduction section 7 passes through the stop head 5 and extends out of the threaded locking limit head 16. The limit head 16 overlaps with the stop head 5 in the axial direction of the adjusting bolt.

[0019] In this embodiment, the locking screw is oriented through the center of the sleeve and parallel to the adjusting bolt.

[0020] In this embodiment, the lower end of the fixing sleeve and / or the spreading sleeve is set to an inverted triangular shape with a blunt head.

[0021] In this embodiment, the fixed base plate is formed by stamping as a single piece of fixed sleeve. The armrest plate and the fixed sleeve are formed by stamping as a single piece.

[0022] In this embodiment, the through-hole structure of the adjusting bolt on the fixed base plate ensures that the adjusting bolt can be rotated and is axially limited. Similar rotatable and axially limited structures are commonly used in mechanical fields such as speed reducers in the prior art. Other prior art evolutions of adjusting bolts are all within the scope of protection of this application.

[0023] Based on this embodiment, multiple guide posts can be provided, respectively located on both sides or around the adjusting bolt.

Claims

1. A fusion device placement and spreading device, comprising a fixed sleeve and a spreading sleeve, both with arc-shaped cross-sections and oppositely arranged arc openings, characterized in that: The expansion sleeve is threaded onto the adjusting bracket, and a locking screw is screwed onto the adjusting bracket. The locking screw abuts against and locks the expansion sleeve. The upper end of the fixed sleeve is connected to a fixed base plate. A guide post is vertically connected to the fixed base plate on the side facing the expansion sleeve. The guide post slides and guides the adjusting bracket. An adjusting bolt parallel to the guide post is also threaded onto the fixed base plate. The adjusting bolt is rotatable and axially positioned on the fixed base plate. The adjusting bolt is threaded onto the adjusting bracket.

2. The fusion device deployment and distraction device of claim 1 wherein: The fixed base plate is provided with an adjustment hole or groove. The inner wall of the adjustment hole or groove is provided with a stop head perpendicular to the direction of the guide column. The head of the adjustment bolt is a section with a reduced diameter. The section with a reduced diameter passes through the stop head. The outer end of the section with a reduced diameter is threaded and locked to a limiting head. The limiting head overlaps with the stop head in the axial direction of the adjustment bolt.

3. A fusion device placement and spreading device, comprising a fixed sleeve and a spreading sleeve, both with arc-shaped cross-sections and oppositely arranged arc openings, characterized in that: The spreading sleeve is connected to the adjusting seat frame from top to bottom. The adjusting seat frame is provided with a threaded locking screw, which abuts against and locks the spreading sleeve. The upper end of the fixed sleeve is connected to a fixed seat plate. A guide post is vertically connected to the side of the fixed seat plate facing the spreading sleeve. The guide post slides through the adjusting seat frame. An adjusting bolt is parallel to the guide post and passes through the fixed seat plate and the adjusting seat frame. The adjusting bolt is spirally connected to the fixed seat plate and the adjusting seat frame through threaded sections with opposite directions in the directions of the fixed seat plate and the adjusting seat frame.

4. An implant deployment and distraction device according to claim 1 or 3, wherein: The adjusting bolt has a rotating handle at one end on the side of the sleeve that is being opened.

5. A fusion device placement expander according to claim 1 or 3, characterized in that: The upper end of the spreading sleeve is connected to a horizontal handrail that faces away from the fixed sleeve.

6. A fusion device placement expander according to claim 5, characterized in that: The handrail and the fixing sleeve are integrally stamped.

7. A fusion device placement expander according to claim 1 or 3, characterized in that: The adjusting bracket includes a sleeve plate and an adjusting plate. The adjusting plate is connected to one side of the sleeve bracket. The guide column slides through the adjusting plate. The adjusting bolt is threaded onto the adjusting plate. The sleeve plate is provided with an arc-shaped opening that fits and opens the outer side of the sleeve. A locking screw is screwed onto the sleeve plate. The two outer openings of the arc-shaped opening are respectively provided with two clamps that clamp and open the arc-shaped end of the sleeve.

8. A fusion device placement expander according to claim 7, characterized in that: The locking screw is oriented through the center of the sleeve and parallel to the adjusting bolt.

9. A fusion device placement expander according to claim 1 or 3, characterized in that: The lower end of the fixed sleeve and / or the spreading sleeve is set in an inverted triangular shape with a blunt head.

10. A fusion device placement expander according to claim 1 or 3, characterized in that: The fixed base plate is formed by stamping a fixed sleeve as a whole.

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