Memory alloy rib bone fracture plate mounting pliers

Abstract

This utility model discloses a shape memory alloy rib plate installation clamp, including a gripping rod and a clamp head. A middle section rod is also provided between the gripping rod and the clamp head. A U-shaped groove is provided at one end of the clamp head near the middle section rod and at one end of the middle section rod near the gripping rod. A rotating column is fixed in the U-shaped groove. Limiting teeth are evenly arranged around the rotating column. A connecting head is fixed at one end of the middle section rod near the clamp head and at one end of the gripping rod near the middle section rod. A positioning tooth plate that cooperates with the limiting teeth is fixed in the connecting head. In this way, before the clamp is inserted, the path of the installation clamp and the angle that the clamp head needs to be adjusted can be observed with a laparoscope. After adjusting the angle, the positioning tooth plate and the limiting teeth can engage to fix the middle section rod and the clamp head. This directly achieves directional locking and improves the convenience and safety of operation.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a shape memory alloy rib bone plate installation clamp. Background Technology

[0002] After a patient suffers a rib fracture, doctors will use internal fixation surgery to treat the patient. The principle is to use rib plates to fix the fractured rib and help it heal. An article titled "Observation on the Efficacy of Thoracoscopic Rib Fracture Reduction and Internal Fixation in the Treatment of Multiple Rib Fractures," published in the *Chinese Journal of Clinical Physicians*, Volume 51, Issue 4, 2023, states that traditional open-chest surgery requires a large incision, dissection of many deep tissues, and extensive dissection to expose the fractured portion. In other words, previous rib fractures could only be fixed from the outside, that is, the outer surface of the rib. However, rib fractures below the scapula and beside the spine, such as... Figure 1 Regions ④ and ⑥, as shown, involve multiple muscle layers and are thick, resulting in significant surgical trauma and numerous postoperative complications. Currently, rib fractures can be treated from within the thoracic cavity, greatly reducing trauma. This article utilizes the characteristic of shape memory alloy bone plates that can deform and unfold at low temperatures and automatically return to their original shape at body temperature after implantation. This allows the bone plates to tightly hug the ribs after placement, thus achieving fixation.

[0003] To perform the above operations, the commonly used instrument is a laparoscopic clamp with a detachable clamp head, as disclosed in application number CN201810111443.6. This clamp, when used inside the body under laparoscopy, allows for arbitrary angle offset and rotation of the instrument via a rotating wheel and a turning wheel mechanism, enabling rotation at any angle within the clamping space during laparoscopic surgery, thus facilitating the surgeon's operation. However, in numerous clinical applications, it has been found that when surgeons use this clamp to adjust the direction of bone plates inserted under laparoscopy, the clamp head and bone plate are prone to breakage. Furthermore, the entire clamp structure is complex and easily damaged, thus affecting the convenience of the surgeon's operation and the safety of the surgery. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, the technical problem to be solved by this utility model is to propose a shape memory alloy rib plate installation clamp, which can lock the direction of the clamp head in advance according to the observation direction under the endoscope before the clamp is inserted, thereby improving the convenience and safety of operation.

[0005] To achieve this objective, the present invention adopts the following technical solution: This utility model provides a shape memory alloy rib plate installation clamp, including a gripping rod and a clamp head. The gripping rod has a gripping part fixed at its tail. The clamp head has a clamping groove that mates with the rib plate. A middle section rod is also provided between the gripping rod and the clamp head. A U-shaped groove is provided at one end of the clamp head near the middle section rod and at one end of the middle section rod near the gripping rod. A rotating column is fixed in the U-shaped groove. The axis of the rotating column is perpendicular to the axis of the middle section rod. Limiting teeth are evenly arranged circumferentially on the rotating column and are disposed in the limiting cavity. A connecting head is fixed at one end of the middle section rod near the clamp head and at one end of the gripping rod near the middle section rod. A positioning tooth plate that mates with the limiting teeth is fixed in the connecting head. Connecting units that mate with the gripping rod and the clamp head are provided at both ends of the middle section rod. When the positioning tooth plate and the limiting teeth are engaged, the middle section rod and the clamp head are fixed.

[0006] When the rotation angle needs to be adjusted, the connecting unit includes a connecting cylinder and an adapter. The adapter has a connecting part that cooperates with the rotating column at one end near the U-shaped groove. The connecting part has a limiting cavity. The two ends of the rotating column are rotatably connected to the limiting cavity. The plane where the clamp head direction adjustment is located is perpendicular to the plane where the middle rod direction adjustment is located. In this way, two nodes can be used to flexibly adjust the multi-dimensional angle.

[0007] After adjusting the angle, the middle section rod and the pliers head need to be fixed. A convex ring is fixed at one end of the connecting cylinder near the adapter. The adapter has an annular groove that mates with the convex ring. The convex ring and the annular groove are rotatably connected. The connecting cylinder and the connector are detachably connected. The connector includes a coarse connecting post that mates with the connecting cylinder and a fine connecting post that mates with the convex ring. The diameter of the fine connecting post is the same as the inner diameter of the convex ring. The positioning tooth plate is fixed at one end of the fine connecting post near the rotating post. After fixing the connecting cylinder and the coarse connecting post, the positioning tooth plate and the limiting tooth can directly fix the middle section rod and the pliers head by meshing.

[0008] The beneficial effects of this utility model are as follows: This invention allows for the use of a laparoscope to observe the insertion path of the clamps and the angle that the clamp head needs to be adjusted before inserting the clamps. After adjusting the angle, the direction of the clamp head is pre-locked according to the direction observed under the laparoscope. That is, after fixing the connecting cylinder and the coarse connecting post, the positioning tooth plate and the limiting tooth can engage to fix the middle rod and the clamp head. This directly achieves the locking of the direction, improving the convenience and safety of operation. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the working position of the shape memory alloy rib plate installation clamp provided in a specific embodiment of this utility model; Figure 2 This is a schematic diagram of a shape memory alloy rib bone plate mounting clamp structure provided in a specific embodiment of this utility model; Figure 3 This is an exploded schematic diagram of a shape memory alloy rib plate mounting clamp provided in a specific embodiment of this utility model; Figure 4 yes Figure 3 Enlarged diagram of A in the middle; Figure 5 This is an exploded view of another perspective of a shape memory alloy rib plate mounting clamp provided in a specific embodiment of this utility model; Figure 6 yes Figure 5 Enlarged diagram of B in the diagram; Figure 7 This is a schematic diagram of the structure of the limiting tooth and the positioning tooth plate provided in a specific embodiment of this utility model; Figure 8 This is a schematic diagram of the connecting cylinder structure provided in a specific embodiment of this utility model; In the picture: 1. Grip lever; 11. Grip section; 2. Pliers head; 21. Grip groove; 3. Middle section lever; 31. Scale markings; 4. U-shaped groove; 41. Rotating column; 411. Limiting tooth; 5. Connector; 51. Coarse connector; 52. Fine connector; 521. Positioning toothed plate; 6. Connecting unit; 61. Connecting cylinder; 62. Adapter; 621. Adapter part; 622. Limiting cavity; 623. Annular groove; 611. Protruding ring. Detailed Implementation

[0010] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0011] To address the issue of installation forceps breaking apart and being damaged when adjusting the direction after the bone plate has been implanted in the body, as shown in the figure, this utility model provides a shape memory alloy rib bone plate installation forceps. The main approach involves using a laparoscope to pre-observe the angle that the forceps head 2 needs to be adjusted, then adjusting it externally and fixing the direction, and finally using the installation forceps to place the bone plate into the predetermined position inside the body. Specifically, it includes a gripping rod 1 and a forceps head 2. The forceps head 2 has a clamping groove 21 that mates with the bone plate, and a wooden plug that mates with and clamps the bone plate can be placed in this groove. Other grippers and similar devices are used to secure the bone plate, which will not be elaborated on here. The end of the gripping rod 1 is fixed with a gripping part 11. A middle section rod 3 is also provided between the gripping rod 1 and the clamp head 2. Both ends of the middle section rod 3 are provided with connecting units 6 that cooperate with the gripping rod 1 and the clamp head 2 respectively. This "three-section" design allows the installation clamps to be rotated and adjusted at two nodes to more flexibly adjust the angle of the clamp head 2 and adapt to more complex bone plate insertion situations. Based on this, it is necessary to have two features at the nodes: "rotation adjustment" and "fixed after adjustment".

[0012] First, "rotational adjustment" is performed. U-shaped grooves 4 are provided at both ends of the pliers head 2 near the middle rod 3 and at the end of the middle rod 3 near the gripping rod 1. A rotating column 41 is fixed in the U-shaped groove 4, with its axis perpendicular to the axis of the middle rod 3. Simultaneously, the connecting unit 6 includes a connecting cylinder 61 and an adapter 62. The adapter 62 has a connecting part 621 near the U-shaped groove 4 that mates with the rotating column 41. The connecting part 621 has a limiting cavity 622, and both ends of the rotating column 41 are rotatably connected to the limiting cavity 622. In this way, the pliers head 2 and the middle rod 3 can be flexibly rotated around the rotating column 41. To provide a reference when adjusting the direction angle, corresponding scale markings 31 are provided on the middle rod 3 and the connecting cylinder 61, as well as on the pliers head 2 and the connecting cylinder 61. Furthermore, the plane where the pliers head 2 is adjusted is perpendicular to the plane where the middle rod 3 is adjusted, enabling more multi-dimensional angle adjustments.

[0013] After adjusting the angle and direction of the pliers head 2 using these two nodes, it is also necessary to fix the middle rod 3 and the pliers head 2, i.e., "fixing after adjustment". The rotating column 41 is also evenly provided with limiting teeth 411 around its circumference, and the limiting teeth 411 are located within the limiting cavity 622. A connecting head 5 is fixedly provided at the end of the middle rod 3 near the pliers head 2 and at the end of the gripping rod 1 near the middle rod 3. The connecting head 5 is fixedly provided with a positioning tooth plate 521 that mates with the limiting teeth 411. The connecting head 5 includes a coarse connecting post 51 that mates with the connecting cylinder 61 and a fine connecting post 52 that mates with the convex ring 611. The coarse connecting post 51 and the connecting cylinder 61 are detachably connected (this detachable fixing method can be threaded connection, snap-fit, etc.). (One of the methods, such as plug-in connection), the diameter of the thin connecting post 52 is the same as the inner diameter of the convex ring 611. The positioning tooth plate 521 is fixed at one end of the thin connecting post 52 near the rotating post 41. Further, the connecting cylinder 61 is fixed at one end near the adapter 62, and the adapter 62 has an annular groove 623 that mates with the convex ring 611. The convex ring 611 and the annular groove 623 are rotatably connected. In this way, during the process of fixing the connecting cylinder 61 and the coarse connecting post 51, the thin connecting post 52 can extend into the limiting cavity 622 under the guidance of the convex ring 611. Then, after the connecting cylinder 61 and the coarse connecting post 51 are fixed, the positioning tooth plate 521 and the limiting tooth 411 mesh, thereby fixing the middle rod 3 and the clamp head 2. Figure 7 It can be seen that the closer the tooth grooves on the positioning tooth plate 521 and the limiting tooth 411 are, the higher the accuracy during adjustment. The more teeth on the positioning tooth plate 521, the stronger the fixation of the positioning tooth plate 521 and the limiting tooth 411.

[0014] In summary, when using this method, a small incision is first made on one side of the abdomen. The path of the forceps insertion and the angle that the forceps head 2 needs to be adjusted are observed using a laparoscope. After adjusting the angle, the connecting cylinder 61 and the coarse connecting post 51 can be fixed directly to achieve directional locking. This allows for external adjustment without the need for internal adjustment, preventing accidents and ensuring the convenience of the doctor's operation and the safety of the surgery.

[0015] This utility model has been described through preferred embodiments. Those skilled in the art will understand that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. This utility model is not limited to the specific embodiments disclosed herein; other embodiments falling within the scope of the claims of this application are all within the protection scope of this utility model.

Claims

1. A shape memory alloy rib plate installation clamp, comprising a gripping rod (1) and a clamp head (2), characterized in that, A middle section rod (3) is also provided between the gripping rod (1) and the pliers head (2). A U-shaped groove (4) is provided at one end of the pliers head (2) near the middle section rod (3) and at the other end of the middle section rod (3) near the gripping rod (1). A rotating column (41) is fixedly mounted on the U-shaped groove (4). The axis of the rotating column (41) is perpendicular to the axis of the middle section rod (3). Limiting teeth (411) are also evenly provided around the rotating column (41). The middle section rod (3) is located near the gripping rod (1). A connector (5) is fixedly provided at one end of the pliers head (2) and at one end of the gripping rod (1) near the middle rod (3). The connector (5) is fixedly provided with a positioning tooth plate (521) that cooperates with the limiting tooth (411). The two ends of the middle rod (3) are provided with connecting units (6) that cooperate with the gripping rod (1) and the pliers head (2) respectively. When the positioning tooth plate (521) and the limiting tooth (411) are engaged, the middle rod (3) and the pliers head (2) are fixed.

2. The shape memory alloy rib plate mounting clamp according to claim 1, characterized in that: The connecting unit (6) includes a connecting cylinder (61) and an adapter (62). The adapter (62) has a connecting part (621) that cooperates with the rotating column (41) at one end near the U-shaped groove (4). The connecting part (621) has a limiting cavity (622). The two ends of the rotating column (41) are rotatably connected to the limiting cavity (622). The limiting tooth (411) is located in the limiting cavity (622). The connecting cylinder (61) has a protruding ring (611) fixed at one end near the adapter (62). The adapter (62) has an annular groove (623) that mates with the protruding ring (611). The protruding ring (611) and the annular groove (623) are rotatably connected. The connecting cylinder (61) and the connector (5) are detachably connected.

3. The shape memory alloy rib plate mounting clamp according to claim 2, characterized in that: The connector (5) includes a coarse connector (51) that mates with the connecting cylinder (61) and a fine connector (52) that mates with the convex ring (611). The diameter of the fine connector (52) is the same as the inner diameter of the convex ring (611). The positioning toothed plate (521) fixes the fine connector (52) to one end near the rotating column (41).

4. The shape memory alloy rib plate mounting clamp according to claim 2, characterized in that: The plane where the direction of the pliers (2) is adjusted is perpendicular to the plane where the direction of the middle rod (3) is adjusted.

5. The shape memory alloy rib plate mounting clamp according to claim 1, characterized in that: The clamp head (2) has a clamping groove (21) that mates with the bone plate.

6. The shape memory alloy rib plate mounting clamp according to claim 1, characterized in that: The gripping part (11) is fixedly provided at the tail of the gripping rod (1).

7. The shape memory alloy rib plate mounting clamp according to claim 2, characterized in that: The middle section rod (3) and the connecting cylinder (61) are provided with matching scale markings (31), and the pliers head (2) and the connecting cylinder (61) are provided with matching scale markings (31).

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