Sternum plate

Abstract

The invention provides a sternum plate, and relates to the technical field of medical instruments, the sternum plate comprises a first connecting piece and a second connecting piece; the first connecting piece comprises a plug board; an inserting convex block is arranged on the inserting plate, and a plurality of first retaining teeth are arranged on the two sides of the inserting convex block in the inserting direction; the second connecting piece comprises a connecting end; the connecting end comprises a first clamping part, a second clamping part and a limiting groove matched with the plug board, a clamping opening is formed between the first clamping part and the second clamping part, clamping opening side walls are arranged on the two opposite sides of the clamping opening, and second retaining teeth are arranged on the clamping opening side walls; the sternum plate is suitable for being matched with the limiting groove through the inserting plate, and limiting and guiding in the inserting process are achieved; the connection of the two connecting pieces is realized by utilizing the meshing design of the inserting convex block and the clamping opening; when a secondary thoracotomy operation needs to be carried out in an emergency, a common instrument can be directly used for cutting, the thoracotomy forceps can be rapidly opened without a special tool, and the operation process of the operation is simplified.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a sternal plate. Background Technology

[0002] Currently, in the medical field, sternal plates have widely replaced steel wires and become the mainstream choice for sternal fixation. The basic structure of a sternal plate typically includes two connectors with clenching claws, which are positioned opposite each other. During surgery, the sternum is brought together using these two clenching claws, and then fasteners are used to connect the two connectors, thereby achieving effective fixation of the sternum.

[0003] However, most existing sternal plates are made of titanium alloy. Due to the high strength of titanium alloy, removal often requires specialized surgical tools and complex procedures. This material is clearly insufficient for patients who need a second thoracotomy after some open-chest surgeries or who need to have their sternal plates removed quickly. It increases the operation time and difficulty, and brings additional risks to patients. Summary of the Invention

[0004] To address the difficulty of disassembling sternal plates during secondary thoracotomy in existing technologies, this invention provides a sternal plate with an insert plate adapted to engage with a limiting groove, thereby limiting and guiding the insertion process. Furthermore, the interlocking design of the insert protrusion and the clamping port enables the connection of the two connecting parts. In emergency situations requiring secondary thoracotomy, the plate can be directly cut using ordinary instruments, allowing for rapid opening without the need for specialized tools, thus simplifying the surgical procedure.

[0005] The technical solution adopted by this invention to solve its technical problem is: A sternal plate, comprising a first connector and a second connector; The first connector includes a plug plate; the plug plate is provided with plug protrusions, and the two sides of the plug protrusions are provided with a plurality of first anti-reverse teeth along the plugging direction; The second connector includes a connecting end; The connecting end includes a first clamping part, a second clamping part, and a limiting groove adapted to the plug plate. A clamping opening is formed between the first clamping part and the second clamping part. Clamping opening sidewalls are provided on opposite sides of the clamping opening, and a second anti-retraction tooth is provided on each clamping opening sidewall. The plug plate is adapted to cooperate with the limiting groove to limit and guide the plugging process; when the plugging protrusion enters the clamping port, the first clamping part and the second clamping part generate elastic deformation outward, so that the plugging protrusion can smoothly enter the clamping port; when the first anti-reverse tooth and the second anti-reverse tooth mesh, its elastic deformation is restored; the first connector and the second connector are connected by the meshing of the first anti-reverse tooth and the second anti-reverse tooth.

[0006] Optionally, the first anti-reverse tooth is arranged in a vertical direction.

[0007] Optionally, the angle between the first anti-reverse tooth and the vertical direction is 20°-60°.

[0008] Optionally, the length of the clamping port sidewall in the horizontal direction is at least 10 mm.

[0009] Optionally, the tooth lengths of the first anti-reverse tooth and the second anti-reverse tooth are 1.5mm-2.5mm.

[0010] Optionally, the connecting end further includes a reinforcing portion, which is disposed on the outside of the first clamping portion and the second clamping portion.

[0011] Optionally, the thickness of the reinforcing part is 1.5mm-2mm.

[0012] Optionally, the first anti-reverse tooth and the second anti-reverse tooth are sawtooth-shaped.

[0013] Optionally, the first anti-reverse tooth and the second anti-reverse tooth are strip-shaped tooth rows extending along the insertion direction, and a slot is provided between adjacent tooth rows, and a slot adapted to them is provided on the side wall of the clamping port.

[0014] Optionally, the sternal plate may also be provided with metal markings.

[0015] The beneficial effects of this invention are: The sternal plate provided by this invention achieves a stable connection of the sternal plate through the guiding cooperation of the limiting flange and the limiting groove, as well as the anti-retraction engagement structure of the insertion protrusion and the clamping port. The connection length can be flexibly adjusted according to the patient's sternal size, significantly expanding the applicability and enhancing the versatility of the sternal plate. Secondly, this invention mainly relies on the lateral deformation of the clamping parts on both sides for fixation. By setting the clamping port sidewall at an angle to the vertical direction, the plate thickness is reduced while ensuring the plate strength, effectively avoiding postoperative discomfort or foreign body sensation caused by an excessively thick plate. Furthermore, the thinner plate also reduces pressure on surrounding tissues, which is beneficial for postoperative recovery and reduces the risk of complications. In addition, this invention uses carbon fiber reinforced modified PEEK material to make the sternal plate. In emergency situations requiring a second thoracotomy, it can be directly cut using ordinary instruments, allowing for quick opening and removal without the need for special tools, simplifying the assembly and removal process of the sternal plate and greatly simplifying the surgical procedure. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 This is a schematic diagram of the assembly of the sternal plate of the present invention. Figure 1 ; Figure 2 yes Figure 1 Exploded view of the midsternal lamina; Figure 3 yes Figure 1 Schematic diagram of the midsternal plate; Figure 4 This is a schematic diagram of the assembly of the sternal plate of the present invention. Figure 2 ; Figure 5 yes Figure 4 Schematic diagram of the midsternal plate; Figure 6 yes Figure 4 Enlarged view of point A in the middle; Figure 7 This is a schematic diagram of the assembly of the sternal plate of the present invention. Figure 3 ; Figure 8 yes Figure 7 Schematic diagram of the midsternal plate; Figure 9 yes Figure 7 Enlarged view of point B in the middle; In the figure: 1-First connector; 11-Plug-in plate; 111-Plug-in protrusion; 1111-First anti-reverse tooth; 112-Plug-in connector; 12-First gripper structure; 2-Second connector; 21-Connecting end; 211-Limiting groove; 212-First clamping part; 213-Second clamping part; 214-Clamping opening; 215-Clamping opening sidewall; 2151-Second anti-reverse tooth; 2152-Groove; 216-Reinforcing part; 3-Metallic mark. Detailed Implementation

[0018] The present invention will now be described in further detail. The embodiments described below are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0019] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0020] It should be noted that the direction indicated by "V" in the accompanying drawings of this invention is the vertical direction, and the direction indicated by "H" is the vertical direction.

[0021] To address the difficulty of removing the sternal plate in existing technologies, such as Figure 1-9 As shown, the present invention provides a sternal plate, including a first connector 1 and a second connector 2; wherein, the first connector 1 includes a plug plate 11; the plug plate 11 is provided with a plug protrusion 111, and the plug protrusion 111 is provided with a plurality of first anti-retraction teeth 1111 on both sides along the plugging direction; the second connector 2 includes a connecting end 21; the connecting end 21 includes a first clamping part 212, a second clamping part 213 and a limiting groove 211 adapted to the plug plate 11, a clamping opening 214 is formed between the first clamping part 212 and the second clamping part 213, clamping opening sidewalls 215 are provided on opposite sides of the clamping opening 214, and each clamping opening sidewall 215 is provided with a second anti-retraction tooth 2151; The plug plate 11 is adapted to cooperate with the limiting groove 211 to limit and guide the plugging process; when the plug protrusion 111 enters the clamping port 214, the first clamping part 212 and the second clamping part 213 generate elastic deformation outward, so that the plug protrusion 111 can smoothly enter the clamping port 214. When the first anti-reverse tooth 1111 and the second anti-reverse tooth 2151 mesh, its elastic deformation is restored; through the meshing of the first anti-reverse tooth 1111 and the second anti-reverse tooth 2151, the connection between the first connector 1 and the second connector 2 is realized.

[0022] To facilitate the closing and fixing of the sternum, the present invention preferably uses hook-shaped structures, such as the first claw structure 12 and the second claw structure 22, which are suitable for closing and fixing the sternum. After connecting the first connector 1 and the second connector 2, the first claw structure 12 and the second claw structure 22 are arranged opposite to each other and located on both sides of the sternum, forming a space suitable for accommodating the sternum, thereby realizing the closing and fixing of the sternum.

[0023] The preferred material for the sternal plate in this invention is carbon fiber reinforced modified polyetheretherketone (PEEK). In emergency situations requiring a second thoracotomy, it can be cut directly using ordinary instruments, allowing for rapid opening and removal without the need for specialized tools. This greatly simplifies the surgical procedure, shortens the operation time, and reduces surgical risks. Furthermore, by using carbon fiber reinforced modified PEEK, this invention avoids the problem of material adhesion to tissues, making the second surgery smoother and reducing operation time and the risk of complications.

[0024] Furthermore, Chinese patent CN117281601A discloses a sternal plate insert, whose structure relies on interlocking upper and lower meshing structures for fixation, primarily achieved through longitudinal deformation of the clamping portions on both sides. To ensure sufficient holding force, the clamping portions on both sides need to be made quite thick. However, since the skin and muscles in the sternal region are relatively thin, installing a thicker plate would require significant muscle stretching during suturing, increasing the difficulty of the surgery, causing a strong foreign body sensation in postoperative patients, and even leading to complications.

[0025] To solve the above problems, the present invention preferably sets the first anti-retraction tooth in a vertical direction. At this time, the clamping mouth sidewall 215 is also set in a vertical direction, so that it mainly relies on the lateral deformation of the clamping parts on both sides to achieve fixation. Therefore, it is not necessary to make the clamping part very thick, and the bone plate can still be ensured to have sufficient holding force and fixation strength.

[0026] In order to reduce the thickness of the clamping parts on both sides while ensuring the strength of the bone plate, the present invention preferably has the first anti-retraction tooth 1111 with the vertical direction at an angle of 20°-60°, and correspondingly, the clamping mouth sidewall 215 with the vertical direction is also at an angle of 20°-60°; furthermore, the present invention preferably has the first anti-retraction tooth 1111 with the vertical direction at an angle of 30°-45°. Within this angle range, the horizontal component force can be greater than the vertical component force, thereby minimizing the thickness of the sternal plate while ensuring the strength of the bone plate.

[0027] In order to provide sufficient contact area and clamping force, the present invention preferably has a horizontal length of at least 10 mm for the clamping port sidewall 215.

[0028] The preferred tooth lengths of the first anti-retraction tooth 1111 and the second anti-retraction tooth 2121 in this invention are 1.5mm-2.5mm. This ensures the mechanical strength of the sternal plate while avoiding unreliable occlusion caused by excessive thinness, thus ensuring good stability and reliability of the sternal plate during use and reducing the patient's foreign body sensation.

[0029] The sternal plate provided by this invention achieves a stable connection of the sternal plate through the guiding cooperation between the insertion plate 11 and the limiting groove 211, and the anti-retraction engagement structure between the insertion protrusion 111 and the clamping port 214. The connection length can be flexibly adjusted according to the patient's sternal size, significantly expanding the applicability and enhancing the versatility of the sternal plate. Secondly, by setting the clamping port sidewall 215 at an angle to the vertical direction, the plate thickness is reduced while ensuring the plate strength, effectively avoiding postoperative discomfort or foreign body sensation caused by an excessively thick plate. Furthermore, the thinner plate also reduces pressure on surrounding tissues, which is beneficial for postoperative recovery and reduces the risk of complications. In addition, this invention uses carbon fiber reinforced modified PEEK material to make the sternal plate. In emergency situations requiring a second thoracotomy, it can be cut directly using ordinary instruments, allowing for quick opening and removal without the need for special tools, simplifying the assembly and removal process of the sternal plate and greatly simplifying the surgical procedure.

[0030] In order to avoid fatigue damage to the outer regions of the first clamping part 212 and the second clamping part 213 caused by excessive force, the connecting end 21 of the present invention preferably further includes a reinforcing part 216. The reinforcing part 216 is disposed on the outer side of the first clamping part 212 and the second clamping part 213 to enhance the structural strength and durability of the entire connecting end.

[0031] Furthermore, the thickness of the reinforcing part 216 is preferably 1.5mm-2mm, which can effectively resist fatigue damage caused by excessive force and avoid operational inconvenience caused by excessive thickness.

[0032] The present invention preferably has a sawtooth tooth shape for the first anti-retraction tooth 1111 and the second anti-retraction tooth 2151, which can provide a stronger locking force and a more stable connection, thereby providing a better anti-retraction effect during the insertion process, ensuring a more secure connection between the first connector 1 and the second connector 2, and reducing the possibility of loosening.

[0033] Preferably, the first anti-retraction tooth 1111 and the second anti-retraction tooth 2151 are strip-shaped tooth rows extending along the insertion direction, and a groove is provided between adjacent tooth rows. The clamping mouth sidewall is provided with a groove 2152 that matches it, allowing the insertion depth to be adjusted within a certain range to adapt to sternums of different thicknesses, improving the flexibility and adaptability of insertion. At the same time, the presence of the groove helps to reduce friction during the insertion process, making the assembly smoother.

[0034] For ease of assembly, the present invention preferably provides a connector 112 at the front end of the connector plate 11, that is, at the end of the connector plate 11 away from the first claw structure 12. The connector 112 can be a triangular, arc-shaped, circular, rectangular or other structures.

[0035] It should be noted that after the first connector 1 and the first connector 2 are assembled, the excess part of the connector 11 on the plug plate 11 can be cut off. The specific cutting length depends on the size of the sternum.

[0036] The sternal plate of the present invention is made of carbon fiber reinforced modified PEEK material. Although this material has good biocompatibility and is X-ray permeable, it is difficult to detect by imaging if the sternal plate accidentally falls out into the body. To solve this problem, the present invention preferably also provides a metal marker 3 on the sternal plate, which significantly improves the in vivo positioning ability of the sternal plate.

[0037] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A sternal plate, characterized in that, The first connecting piece (1) and the second connecting piece (2) are included. The first connecting piece (1) includes a plug-in plate (11), and a plug-in protrusion (111) is arranged on the plug-in plate (11), and a plurality of first anti-backout teeth (1111) are arranged on both sides of the plug-in protrusion (111) along a plug-in direction. The second connecting piece (2) includes a connecting end (21). The connecting end (21) includes a first clamping portion (212), a second clamping portion (213), and a limiting groove (211) matched with the plug-in plate (11), a clamping opening (214) is formed between the first clamping portion (212) and the second clamping portion (213), opposite sides of the clamping opening (214) are provided with clamping opening side walls (215), and a second anti-backout tooth (2151) is arranged on each clamping opening side wall (215). The plug-in plate (11) is matched with the limiting groove (211) to limit and guide the plug-in process; when the plug-in protrusion (111) enters the clamping opening (214), the first clamping portion (212) and the second clamping portion (213) are elastically deformed outward, so that the plug-in protrusion (111) smoothly enters the clamping opening (214), and the elastic deformation is restored when the first anti-backout tooth (1111) and the second anti-backout tooth (2151) are engaged; the first connecting piece (1) and the second connecting piece (2) are connected through the engagement of the first anti-backout tooth (1111) and the second anti-backout tooth (2151).

2. The sternal plate of claim 1 wherein, The first anti-backout tooth (1111) is arranged in a vertical direction.

3. The sternal plate of claim 1 wherein, The angle between the first anti-backout tooth (1111) and the vertical direction is 20°-60°.

4. The sternal plate of claim 1 wherein, The length of the clamping opening side wall (215) in the horizontal direction is at least 10 mm.

5. The sternal plate of claim 1 wherein, The length of the first anti-backout tooth (1111) and the second anti-backout tooth (2151) is 1.5 mm-2.5 mm.

6. The sternal plate of claim 1 wherein, The connecting end (21) further includes a reinforcing portion (216), and the reinforcing portion (216) is arranged outside the first clamping portion (212) and the second clamping portion (213).

7. The sternal plate of claim 6 wherein, The thickness of the reinforcing portion (216) is 1.5 mm-2 mm.

8. The sternal plate of claim 4 wherein, The first anti-backout tooth (1111) and the second anti-backout tooth (2151) are sawtooth-shaped.

9. The sternal plate of claim 4 wherein, The first anti-backout tooth (1111) and the second anti-backout tooth (2151) are strip-shaped tooth rows extending along the plug-in direction, and a slot gap is arranged between adjacent tooth rows, and a slot opening (2152) matched with the clamping opening side wall (215) is arranged on the clamping opening side wall (215).

10. The sternal plate of claim 1 wherein, The sternal plate is further provided with a metal mark (3).

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