A single-incision anterior and posterior spinal fusion surgical device and method

Abstract

This invention provides a single-incision anterior-posterior spinal fusion surgical device and method, belonging to the field of medical device technology. The device and method include: a bolt; a hexagonal nut threaded onto the bolt surface; a conical head fixedly connected to one side of the bolt; and a rectangular window formed on the circumferential surface of the bolt. At the end of the surgery, a spring rebounds, extending two outward-curving wings. After the wings expand within the bone, they can fix the bolt, making it stable and secure. The dual-wing design of the interbody fusion device improves vertebral stability, and the core bolt can be optimally positioned. This minimally invasive surgery with a small incision reduces bleeding, hospitalization time, and recovery time compared to open surgery. The device allows for anterior-posterior spinal fusion surgery through a single incision, which not only reduces surgical trauma but also lowers the risk of postoperative complications.

Description

Technical Field

[0001] This invention belongs to the field of medical device technology, specifically relating to a single-incision anterior and posterior spinal fusion surgical device and method. Background Technology

[0002] The human spine is composed of multiple vertebrae. The thicker, rounder structure at the front is the vertebral body, and behind the vertebral body is the spinous canal. Behind the spinous canal is a bony structure that protrudes posteriorly, called the spinous process. The spinous process is not only relatively superficial but also plays a crucial role in connecting the upper and lower vertebrae. Many ligaments attach to the spinous process; the interspinous ligaments and supraspinous ligaments connect the spinal segments. Spinal diseases can lead to serious symptoms. These diseases include abnormalities in the vertebrae, intervertebral discs, facet joints, and connecting tissues surrounding the spine. These abnormalities can stem from various causes, including mechanical injury or degenerative disc disease. These abnormalities can lead to spinal instability, causing the spine to become misaligned and creating micromovements between adjacent vertebrae. Spinal misalignment and micromovements can lead to wear and tear on the vertebral surfaces, eventually causing severe pain. Furthermore, these diseases are often chronic and progressively worsening.

[0003] Surgical techniques such as spinal fusion are necessary for the treatment of spinal diseases. Spinal fusion is usually used when the spine cannot perform its main functions properly or when related nerves are affected due to degeneration or misalignment. Traditional devices cannot achieve unfolding fixation during implantation, which can lead to loosening when the bolts and holes do not match. When used in conjunction with bone graft materials, they cannot effectively promote bone fusion, affecting the patient's later rehabilitation and work activities. Summary of the Invention

[0004] The purpose of this invention is to provide a single-incision anterior and posterior spinal fusion surgical device and method, which aims to solve the problem that traditional devices in the prior art cannot achieve unfoldable fixation during implantation, which leads to wobbling due to mismatch between bolts and holes. When used in conjunction with bone graft materials, it cannot effectively promote bone fusion, thus affecting the patient's later rehabilitation and work activities.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A single-incision anterior-posterior spinal fusion surgical device, characterized in that it comprises:

[0007] bolt;

[0008] A hexagonal nut, which is threaded onto the surface of a bolt;

[0009] A tapered head, which is fixedly connected to one end of a bolt;

[0010] A rectangular window is provided on the circumferential surface of the bolt;

[0011] The unfolding mechanism includes a flap, a connecting rod, a fixing block, a spring, an inclined plate, a first hollow groove, a connecting column, a second hollow groove, and a limiting structure. Two sets of flaps, fixing blocks, inclined plates, and second hollow grooves are provided. Two flaps are located within a rectangular window. The connecting rod is fixedly connected to the inner walls of the rectangular window at their near ends. Two flaps are fitted onto the circumferential surface of the connecting rod. Two second hollow grooves are respectively opened at the near ends of the two flaps. Two fixing blocks are rotatably connected to the two second hollow grooves via hinges. The connecting column is fixedly connected to the lower inner wall of the rectangular window. The first hollow groove is opened at the upper end of the connecting column. Two inclined plates are fixedly connected between the inner walls of the first hollow groove at their two sides. The spring is fixedly connected to the near ends of the inclined plates and the fixing blocks.

[0012] A limiting structure is provided on the lower side of the fixed block to achieve the connection and limiting function of the connecting column and the wing.

[0013] As a preferred embodiment of the present invention, the limiting structure includes a first docking plate, a second docking plate, and a circular hole. The first docking plate is rotatably connected to a second hollow groove via a hinge shaft, the second docking plate is rotatably connected to a first hollow groove via a hinge shaft, and the circular hole is formed on one side of the second docking plate.

[0014] As a preferred embodiment of the present invention, a limiting sleeve is fixedly connected to one side end of the hexagonal nut, and the limiting sleeve is sleeved on the circumferential surface of the bolt.

[0015] In a preferred embodiment of the present invention, the bolt and the tapered head are designed as a single unit.

[0016] As a preferred embodiment of the present invention, the top of the conical head is designed with a pointed tip.

[0017] As a preferred embodiment of the present invention, the bolt has a size of 8mm-14mm.

[0018] A single-incision anterior-posterior spinal fusion surgical method includes the following steps:

[0019] S1. During minimally invasive surgery, the conical head is placed against the hole, and the bolt is turned into the bone. Under the limitation of the hole, the wings are in a closed state, and the internal spring will bend slightly. The fixing block will rotate upward and be stored in the hollow groove. After the surgery, the spring rebound will open the two wings outward in an arc shape, which can fix the bolt, making it stable and firm. The double-wing design of the interbody fusion device improves the stability of the vertebral body, and the core bolt can achieve optimal placement.

[0020] S2. Thread the hexagonal nut onto the surface of the bolt so that the device can be fixed in a specified position and the length distance can be controlled;

[0021] S3. When the wings unfold, the spring will straighten the first and second docking plates for docking, thus maintaining the stable opening and closing of the wings.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] 1. At the end of the surgery, the spring rebounds, opening the two wings outward in an arc shape. After the wings unfold within the bone, they can fix the bolts, making them stable and secure. The interbody fusion device with its double-wing design improves vertebral stability, and the core bolts can be optimally placed. This minimally invasive surgery with a small incision reduces bleeding, hospitalization time, and recovery time compared to open surgery. The dual design of the wings and fixation blocks allows the surgeon to better control the position of surgical instruments, thereby reducing the risk of surgical trauma and complications. The device can complete anterior and posterior spinal fusion surgery through a single incision, which not only reduces surgical trauma but also lowers the risk of postoperative complications.

[0024] 2. Single-incision anterior and posterior spinal fusion can reduce recovery time, hospitalization time, postoperative pain, blood loss, and scarring. Due to the small surgical incision, potential damage to highly vascularized and nerve structures is avoided. The procedure is performed under local anesthesia, reducing pain for patients with chronic diseases. Achieving anterior and posterior spinal fusion through a single incision reduces surgical trauma and recovery time, while improving the precision and stability of the surgery.

[0025] 3. The two sets of devices can be used together for greater stability. One set uses a hexagonal nut threaded to the surface of the bolt, so that the device can be fixed in a specified position and the length distance can be controlled. Attached Figure Description

[0026] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0027] Figure 1 This is a front perspective view of the present invention;

[0028] Figure 2 For the present invention Figure 1 A magnified view of the mid-wing section;

[0029] Figure 3 This is a top view of the present invention;

[0030] Figure 4 This is a first side perspective view of the present invention;

[0031] Figure 5 This is a second side perspective view of the present invention.

[0032] In the diagram: 1. Bolt; 2. Hexagonal nut; 3. Limiting sleeve; 4. Conical head; 5. Wing; 6. Rectangular window; 7. Connecting rod; 8. Fixing block; 9. Spring; 10. Inclined plate; 11. First mating plate; 12. Second mating plate; 13. First hollow groove; 14. Connecting column; 15. Second hollow groove. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Example 1

[0035] Please see Figures 1-5 The present invention provides the following technical solutions:

[0036] A single-incision anterior-posterior spinal fusion surgical device includes:

[0037] Bolt 1;

[0038] Hex nut 2, hex nut 2 is threaded onto the surface of bolt 1;

[0039] Conical head 4 is fixedly connected to one end of bolt 1;

[0040] A rectangular window 6 is formed on the circumferential surface of bolt 1;

[0041] The unfolding mechanism includes a flap 5, a connecting rod 7, a fixing block 8, a spring 9, an inclined plate 10, a first hollow groove 13, a connecting column 14, a second hollow groove 15, and a limiting structure. Two sets of flaps 5, fixing blocks 8, inclined plates 10, and second hollow grooves 15 are provided. Both flaps 5 are located within a rectangular window 6. The connecting rod 7 is fixedly connected to the inner walls of both sides of the rectangular window 6, and both flaps 5 are fitted onto the circumferential surface of the connecting rod 7. Two second hollow grooves 15 are respectively opened at the adjacent ends of the two flaps 5. Two fixing blocks 8 are rotatably connected to the two second hollow grooves 15 via hinges. The connecting column 14 is fixedly connected to the lower inner wall of the rectangular window 6. The first hollow groove 13 is opened at the upper end of the connecting column 14. Two inclined plates 10 are fixedly connected between the inner walls of both sides of the first hollow groove 13. The spring 9 is fixedly connected to the adjacent ends of the inclined plates 10 and the fixing blocks 8.

[0042] A limiting structure is provided on the lower side of the fixed block 8 to achieve the connection and limiting function of the connecting column 14 and the wing 5.

[0043] In a specific embodiment of the present invention, the device has two springs 9. The intervertebral disc fusion device consists of a bolt 1 and a conical head 4. The wings 5 ​​can extend from the rectangular window 6 opened on the circumferential surface of the bolt 1. The two wings 5 ​​can be restricted within the rectangular window 6 by the connecting rod 7. When the bolt 1 needs to be drilled into the bone, the wings 5 ​​are in a closed state. At this time, the fixing block 8 is affected by the elastic force of the spring 9 and rotates upward on the rotating shaft surface. The spring 9 will bend slightly. The other side can be limited by the inclined plate 10 to protect its stability. The wings 5 ​​are stably fixed by the connection between the fixing block 8 and the spring 9. The first hollow groove 13 on the upper side of the connecting column 14 is used to prevent the wings 5 ​​from expanding too much. In minimally invasive surgery with a small incision of <2.6cm, the conical head 4 of the device rests against the bone surface. After the device is drilled into the bone, the spring 9 rebounds, opening the two wings 5 ​​outward in an arc shape. It is used with the allogeneic bone graft DBM bone fusion material to promote bone fusion. After the wings 5 ​​expand in the bone, the bolt 1 can be fixed, making it stable and firm. The intervertebral fusion device with double wing design improves vertebral stability. The core bolt 1 can achieve optimal placement. Minimally invasive surgery with a small incision, compared with open surgery... Compared to traditional fusion surgery, this procedure reduces blood loss, hospitalization time, and recovery time. A posterior or lateral incision provides a percutaneous, lateral access to the patient's spine. The minimally invasive approach disperses muscles and, unlike traditional fusion surgery, eliminates the need to dissect healthy soft tissue, reducing postoperative pain and promoting faster recovery. A single incision for anterior and posterior spinal fusion reduces recovery time, hospitalization time, postoperative pain, blood loss, and scarring. The small incision avoids potential damage to highly vascularized and neural structures. Performed under local anesthesia, it reduces pain for patients with chronic diseases. Achieving anterior and posterior spinal fusion through a single incision reduces surgical trauma and recovery time while improving surgical precision and stability. This design allows surgeons to achieve spinal correction and stabilization under minimally invasive conditions, providing patients with faster recovery and better treatment outcomes. During device implantation, two sets of devices are used simultaneously. One set has a hexagonal nut 2 threaded onto the surface of a bolt 1, allowing the device to be positioned at a designated location and its length controlled. The other set does not require the hexagonal nut 2. During deployment and retraction, a limiting structure further enhances the stability of the wings 5, preventing deviation or excessive amplitude.

[0044] Please refer to the details. Figure 2 The limiting structure includes a first docking plate 11, a second docking plate 12 and a circular hole. The first docking plate 11 is rotatably connected to the second hollow groove 15 via a hinge shaft, and the second docking plate 12 is rotatably connected to the first hollow groove 13 via a hinge shaft. The circular hole is opened on one side of the second docking plate 12.

[0045] In this embodiment: by inserting the pin into the second docking plate 12, the first docking plate 11 and the second docking plate 12 can be bound together. This can maintain their mobility and also help position the wings 5. When the wings 5 ​​are closed, the first docking plate 11 and the second docking plate 12 will gradually fold downwards. When the wings 5 ​​are unfolded, the spring 9 will cause the first docking plate 11 and the second docking plate 12 to be straightened, which will serve as docking and protect their stable opening and closing.

[0046] Please refer to the details. Figures 1-5 A limiting sleeve 3 is fixedly connected to one side of the hexagonal nut 2, and the limiting sleeve 3 is sleeved on the circumferential surface of the bolt 1.

[0047] In this embodiment: when the hexagonal nut 2 contacts the bone, the limiting sleeve 3 can play a limiting role to prevent the hexagonal nut 2 from continuing to move forward or the bolt 1 from rotating again. The surface of the limiting sleeve 3 has a raised texture to help stabilize the positioning and reinforcement device.

[0048] Please refer to the details. Figure 1 Bolt 1 and tapered head 4 are designed as a single unit.

[0049] In this embodiment, the bolt 1 and the conical head 4 are designed as a single unit, which improves stability and increases toughness to prevent breakage during surgery.

[0050] Please refer to the details. Figures 1-5 The top of the cone-shaped head 4 is designed with a pointed tip.

[0051] In this embodiment, the top of the conical head 4 is designed with a pointed tip, which makes the top sharp and makes it easier to find the hole for drilling, improving the stability and reliability of the connection. The pointed tip design reduces friction between the head and the hole wall during assembly, making it easier to rotate the bolt 1.

[0052] Please refer to the details. Figure 1 Bolt 1 has a size of 8mm-14mm.

[0053] In this embodiment, the size of bolt 1 is between 8mm and 14mm, and the appropriate model can be matched according to the patient's age to improve convenience and improve the progress of the operation.

[0054] The working principle and usage process of this invention: During minimally invasive surgery with a small incision, the conical head 4 rests against the bone surface. Before the device is drilled into the bone, the wings 5 ​​are restricted by the holes on the bone surface and are in a closed state. After implantation, the spring 9 rebounds, opening the two wings 5 ​​outward in an arc shape. After the wings 5 ​​are unfolded inside the bone, they can fix the bolt 1, making it stable and firm. The intervertebral fusion device with a double-wing design improves the stability of the vertebral body. The core bolt 1 can achieve optimal placement. When the device is implanted, two sets of devices are used simultaneously. In one set, the hexagonal nut 2 is threaded to the surface of the bolt 1, so that the device can be shaped in a designated position and the length distance can be controlled. Single-incision anterior and posterior spinal fusion can reduce recovery time, hospitalization time, postoperative pain, blood loss and scarring. Due to the small surgical incision, potential damage to highly vascularized and nerve structures is avoided. It is performed under local anesthesia, reducing pain for patients with chronic diseases.

[0055] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A single-incision anterior-posterior spinal fusion surgical device, characterized in that: include: Bolt (1); A hexagonal nut (2) is threaded onto the surface of a bolt (1); A conical head (4) is fixedly connected to one end of a bolt (1); A rectangular window (6) is provided on the circumferential surface of the bolt (1); The unfolding mechanism includes a flap (5), a connecting rod (7), a fixing block (8), a spring (9), an inclined plate (10), a first hollow groove (13), a connecting column (14), a second hollow groove (15), and a limiting structure. The flap (5), fixing block (8), inclined plate (10), and second hollow groove (15) are each provided in two sets. Both flaps (5) are located within a rectangular window (6). The connecting rod (7) is fixedly connected to the inner walls of both sides of the rectangular window (6) at their closest points. Both flaps (5) are fitted onto the connecting rod (7). The two second hollow grooves (15) are respectively opened at the close ends of the two wings (5), the two fixed blocks (8) are respectively rotatably connected to the two second hollow grooves (15) through hinges, the connecting column (14) is fixedly connected to the lower inner wall of the rectangular window (6), the first hollow groove (13) is opened at the upper end of the connecting column (14), the two inclined plates (10) are fixedly connected between the inner walls of the two sides of the first hollow groove (13), and the spring (9) is fixedly connected to the close ends of the inclined plate (10) and the fixed block (8); A limiting structure is provided on the lower side of the fixed block (8) to realize the connection and limiting function of the connecting column (14) and the wing (5); The limiting structure includes a first docking plate (11), a second docking plate (12), and a circular hole. The first docking plate (11) is rotatably connected to the second hollow groove (15) via a hinge shaft. The second docking plate (12) is rotatably connected to the first hollow groove (13) via a hinge shaft. The circular hole is opened on one side of the second docking plate (12).

2. The single-incision anterior-posterior spinal fusion surgical device according to claim 1, characterized in that: A limiting sleeve (3) is fixedly connected to one side of the hexagonal nut (2), and the limiting sleeve (3) is sleeved on the circumferential surface of the bolt (1).

3. The single-incision anterior-posterior spinal fusion surgical device according to claim 2, characterized in that: The bolt (1) and the conical head (4) are designed as a single unit.

4. The single-incision anterior-posterior spinal fusion surgical device according to claim 3, characterized in that: The top of the conical head (4) is designed with a pointed tip.

5. The single-incision anterior-posterior spinal fusion surgical device according to claim 4, characterized in that: The bolt (1) has a size of 8mm-14mm.

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