Assembled brachial intramedullary nail plate

Abstract

The utility model provides an assembled brachial intramedullary nail plate, and belongs to the technical field of medical instruments. The assembly type humeral intramedullary nail plate comprises a bone fracture plate, an intramedullary nail, an intramedullary fixing nail and a plate locking nail, the inner side wall of the bone fracture plate conforms to the side wall curve of a greater tuberosity of a humeral head, the intramedullary nail is in a bent shape conforming to the shape of a humeral marrow cavity, a middle locking hole is formed in the middle of the bone fracture plate, and the plate locking nail is arranged in the middle of the bone fracture plate. The upper end of the intramedullary nail is located on the inner side of the middle locking hole, the threaded part of the intramedullary fixing nail penetrates through the middle locking hole and is matched with a threaded nail hole in the upper end of the intramedullary nail, multiple sets of edge locking holes are formed in the circumferential direction of the bone fracture plate, and the plate locking nail penetrates through the edge locking holes to fix the bone fracture plate to the greater tuberosity of the humerus head. According to the assembly type humeral intramedullary nail plate, after an intramedullary nail is implanted, the bone fracture plate is installed at the upper end of the intramedullary nail, trauma is small, operation is easy, and fixation is stable.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology, specifically relating to an assembled intramedullary nail plate for the humerus. Background Technology

[0002] The humerus, commonly known as the upper arm bone, is a typical long bone consisting of a "body and two ends." The upper end, the humeral head, and the lower end, the distal humerus, form part of the shoulder joint and elbow joint, respectively. The middle part is the humeral body, which contains the anatomical neck. Both ends of the humerus are prone to fracture, especially in young adults with high-energy trauma and in elderly people with osteoporosis. The probability of fracture is significantly increased, particularly in elderly people with osteoporosis. Many important blood vessels and nerves are distributed around the humerus, and humeral fractures can damage these structures, leading to serious consequences. To reduce and fix the fracture fragments, methods such as closed reduction / percutaneous Kirschner wire fixation, minimally invasive reduction / internal fixation, and standard open reduction and internal fixation can be used. During fixation, multiple techniques such as Kirschner wires, plates, and intramedullary nails are often used. The commonly used humeral locking plate is the Philos plate, a long plate structure. For localized fractures of the greater or lesser tuberosities in proximal humeral fractures, the use of a strip-plate structure for fixation increases the size of the surgical incision and patient discomfort. Furthermore, the mechanical stability of the humeral locking plate in locking the proximal humeral fracture is poor, which is detrimental to patient recovery. Elderly patients with severe osteoporosis face risks of insecure fixation and pin slippage when using plates and screws, potentially leading to plate deformation or breakage. The plate insertion process is highly invasive, often causing damage to surrounding soft tissues and exacerbating vascular damage in the fracture area, resulting in delayed healing or even nonunion. Conventional intramedullary nailing often requires insertion through the articular surface of the humeral head, which can damage the articular surface and the proximal humeral rotator cuff structure, affecting postoperative shoulder joint function recovery. Intramedullary nails also have poor torsional resistance and often fail to effectively and securely fix multiple fracture fragments in the proximal humerus, thus reducing the stability of fracture fixation and hindering fracture healing. Utility Model Content

[0003] The purpose of this invention is to provide an assembled intramedullary nail plate for the humerus, which aims to solve the problem of significant damage and difficulty in recovery for patients after intramedullary nailing for humeral fractures.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: An assembled humeral intramedullary nail plate is provided, comprising a bone plate, an intramedullary nail, an intramedullary fixation nail, and a plate locking nail. The inner sidewall of the bone plate conforms to the sidewall curve of the greater tubercle of the humeral head. The intramedullary nail is curved to conform to the shape of the humeral medullary cavity. A central locking hole is provided in the middle of the bone plate. The upper end of the intramedullary nail is located inside the central locking hole. The threaded portion of the intramedullary fixation nail passes through the central locking hole, and the threaded portion matches the threaded nail hole at the upper end of the intramedullary nail. Multiple sets of edge locking holes are provided circumferentially on the bone plate. The plate locking nail passes through the edge locking holes to fix the bone plate to the greater tubercle of the humeral head.

[0005] In one possible implementation, the head of the intramedullary fixation nail has a locking bevel on the side near the threaded portion.

[0006] In one possible implementation, a rotating groove is provided on the side of the nail head away from the threaded portion.

[0007] In one possible implementation, three sets of edge locking holes are provided on the left and right sides of the bone plate, respectively.

[0008] In one possible implementation, the plate locking pins on the upper part of the bone plate are inclined downwards, and the plate locking pins on the lower part of the bone plate are inclined upwards.

[0009] In one possible implementation, the plate locking pin on the right side of the middle portion of the bone plate is tilted to the left, and the plate locking pin on the left side of the middle portion of the bone plate is tilted to the right.

[0010] In one possible implementation, the edge of the bone plate is provided with multiple sets of suture holes, and the inner sidewall of the bone plate is provided with a suture groove, which connects the sidewall of the suture holes to the edge of the bone plate.

[0011] In one possible implementation, the bone plate has Kirschner wire holes in its center.

[0012] In one possible implementation, the lower part of the intramedullary nail is provided with two sets of intramedullary locking nails.

[0013] In one possible implementation, the intramedullary locking nail is positioned on the centerline of the intramedullary nail.

[0014] The beneficial effects of the assembled humeral intramedullary nail plate provided by this utility model are as follows:

[0015] Compared with existing technologies, this method incorporates a bone plate, intramedullary nail, intramedullary fixation screw, and plate locking screw. The medial wall of the bone plate conforms to the physiological curve of the lateral aspect of the greater tubercle of the humeral head, and the medial wall of the bone plate is arc-shaped. The intramedullary nail conforms to the shape of the humeral medullary cavity and is curved. The intramedullary nail is inserted from the lateral wall of the greater tubercle of the humeral head and downwards along the humeral medullary cavity. The bone plate has a central locking hole. After the intramedullary nail is inserted into the humeral medullary cavity, the central locking hole of the bone plate is aligned with the upper end of the intramedullary nail. The threaded part of the intramedullary fixation screw passes through the central locking hole and enters the threaded screw hole at the upper end of the intramedullary nail. The threaded part matches the threaded screw hole, and the intramedullary fixation screw fixes the bone plate to the upper end of the intramedullary nail. The bone plate is set to conform to the lateral wall of the greater tubercle of the humeral head. The plate locking screw passes through the edge locking hole set around the periphery of the bone plate and fixes the bone plate to the greater tubercle of the humeral head. This method is simple to operate, less invasive, provides stable fixation, and improves the patient's recovery speed. 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 A three-dimensional structural diagram of the assembled humeral intramedullary nail plate provided for an embodiment of this utility model;

[0018] Figure 2 This is a three-dimensional structural diagram of the bone plate used in the embodiment of this utility model;

[0019] Figure 3 This is an exploded exploded structural diagram of the intramedullary fixation nail, bone plate, and intramedullary nail used in the embodiments of this utility model.

[0020] Figure 4 This is a three-dimensional structural diagram of the outer side of the bone plate used in the embodiment of this utility model;

[0021] Figure 5 This is a three-dimensional structural diagram of the inner side of the bone plate used in the embodiment of this utility model.

[0022] In the diagram: 1. Bone plate; 2. Central locking hole; 3. Edge locking hole; 4. Suture hole; 5. Suture groove; 6. Kirschner wire hole; 7. Intramedullary nail; 8. Threaded screw hole; 9. Intramedullary fixation screw; 10. Locking bevel; 11. Rotation groove; 12. Plate locking screw; 13. Intramedullary locking screw. 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 an assembled humeral intramedullary nail plate, comprising a bone plate 1, an intramedullary nail 7, an intramedullary fixation nail 9, and a plate locking nail 12. The inner sidewall of the bone plate 1 conforms to the sidewall curve of the greater tubercle of the humeral head. The intramedullary nail 7 is curved to conform to the shape of the humeral medullary cavity. A central locking hole 2 is provided in the middle of the bone plate 1. The upper end of the intramedullary nail 7 is located inside the central locking hole 2. The threaded part of the intramedullary fixation nail 9 passes through the central locking hole 2, and the threaded part matches the threaded nail hole 8 at the upper end of the intramedullary nail 7. Multiple sets of edge locking holes 3 are provided circumferentially on the bone plate 1. The plate locking nail 12 passes through the edge locking holes 3 to fix the bone plate 1 to the greater tubercle of the humeral head.

[0025] This utility model provides an assembled humeral intramedullary nail plate, which, compared with the prior art, includes a bone plate 1, an intramedullary nail 7, an intramedullary fixation nail 9, and a plate locking nail 12. The inner wall of the bone plate 1 conforms to the physiological curve of the lateral side of the greater tubercle of the humeral head, and the inner wall of the bone plate 1 is arc-shaped. The intramedullary nail 7 conforms to the shape of the humeral medullary cavity, and the intramedullary nail 7 is curved. The intramedullary nail 7 is inserted from the lateral wall of the greater tubercle of the humeral head and downwards along the humeral medullary cavity. The bone plate 1 is provided with a central locking hole 2. After the intramedullary nail 7 is inserted into the humeral medullary cavity, the bone plate is... The locking hole 2 in the middle of the intramedullary nail 1 coincides with the upper end of the intramedullary nail 7. The threaded part of the intramedullary fixation nail 9 passes through the locking hole 2 in the middle and enters the threaded nail hole 8 at the upper end of the intramedullary nail 7. The threaded part matches the threaded nail hole 8. The intramedullary fixation nail 9 fixes the bone plate 1 to the upper end of the intramedullary nail 7. The bone plate 1 is set to fit the lateral wall of the greater tubercle of the humeral head. The plate locking nail 12 passes through the locking hole 3 set in the circumferential edge of the bone plate 1 and fixes the bone plate 1 to the greater tubercle of the humeral head. The operation is simple, the trauma is small, the fixation is stable, and the patient's recovery speed is improved.

[0026] For details, please refer to Figures 1 to 5The system includes a bone plate 1, an intramedullary nail 7, an intramedullary fixation nail 9, and a plate locking nail 12. The bone plate 1 is an arc-shaped plate, and its inner wall conforms to the physiological curve of the lateral side of the greater tubercle of the humeral head. The intramedullary nail 7 is curved and conforms to the shape of the humeral medullary canal. The intramedullary nail 7 is inserted from the lateral wall of the greater tubercle of the humeral head and downwards along the humeral medullary canal. After the intramedullary nail 7 is inserted into the humeral medullary canal, its upper end is located at the greater tubercle of the humeral head. In the horizontal direction, the upper and lower ends of the intramedullary nail 7 are positioned close to the bone plate 1 relative to the middle region of the intramedullary nail 7. The middle locking hole 2 is located in the middle of the bone plate 1. The inner side of the bone plate 1 has a receiving groove that matches the upper end of the intramedullary nail 7. The receiving groove communicates with the middle locking hole 2. Matching the upper end of the intramedullary nail 7, which has a threaded screw hole 8, the intramedullary fixation nail 9 includes a screw head and a threaded portion. The threaded portion passes through the central locking hole 2 and enters the threaded screw hole 8, with the threaded portion threadedly matching the threaded screw hole 8. The screw head is located on the outer side of the bone plate 1, away from the greater tubercle of the humeral head. As the threaded portion is screwed into the threaded screw hole 8, the bone plate 1 and the intramedullary nail 7 are combined and fixed. The edge locking holes 3 are distributed around the circumference of the bone plate 1. The plate locking screw 12 passes through the edge locking holes 3 and enters the greater tubercle of the humeral head, fixing the bone plate 1 to the greater tubercle of the humeral head and increasing the stability of the device fixation. The intramedullary nail 7 and the bone plate 1 are implanted separately, which is simple to operate, causes little damage to the patient, and helps to improve the patient's recovery speed.

[0027] As a specific embodiment of the assembled intramedullary nail plate of the humerus provided by this utility model, please refer to Figure 3 The intramedullary fixation nail 9 has a locking bevel 10 on the side of the nail head near the threaded portion.

[0028] For details, please refer to Figure 3 A locking bevel 10 is provided on the inner wall of the nail head near the threaded part. The locking bevel 10 is arranged along the circumference of the nail head. As it gets closer to the center of the nail head, the distance between the locking bevel 10 and the outer wall of the nail head gradually increases. The locking bevel 10 contacts the inner wall of the central locking hole 2, which helps to enhance the connection strength between the bone plate 1 and the intramedullary nail 7.

[0029] As a specific embodiment of the assembled intramedullary nail plate of the humerus provided by this utility model, please refer to Figure 3 A rotating groove 11 is provided on the side of the nail head away from the threaded part.

[0030] For details, please refer to Figure 3 The rotating groove 11 is located at the center of the outer wall of the nail head away from the threaded part. The rotating groove 11 is an internal hexagonal groove, which facilitates the installation of the intramedullary fixation nail 9.

[0031] As a specific embodiment of the assembled intramedullary nail plate of the humerus provided by this utility model, please refer to Figures 1 to 5Three sets of edge locking holes 3 are provided on the left and right sides of the bone plate 1.

[0032] For details, please refer to Figures 1 to 5 There are six sets of edge locking holes 3. Three sets of edge locking holes 3 are provided on the left side of the bone plate 1. The three sets of edge locking holes 3 on the left side of the bone plate 1 are arranged from top to bottom. Three sets of edge locking holes 3 are provided on the right side of the bone plate 1. The three sets of edge locking holes 3 on the right side of the bone plate 1 are arranged from top to bottom.

[0033] As a specific embodiment of the assembled intramedullary nail plate of the humerus provided by this utility model, please refer to Figures 1 to 5 The plate locking screws 12 on the upper part of the bone plate 1 are inclined downwards, and the plate locking screws 12 on the lower part of the bone plate 1 are inclined upwards.

[0034] For details, please refer to Figures 1 to 5 The plate locking screws 12 and the edge locking holes 3 are set one-to-one. The edge locking holes 3 are inclined holes. The plate locking screws 12 are set at an inclination. The upper part of the bone plate 1 is provided with two sets of edge locking holes 3. The two sets of plate locking screws 12 on the upper part of the bone plate 1 are set at a downward inclination. That is, the height of the end of the plate locking screw 12 on the upper part of the bone plate 1 near the bone plate 1 is higher than the height of the end implanted into the greater tubercle of the humeral head. The lower part of the bone plate 1 is provided with two sets of edge locking holes 3. The two sets of plate locking screws 12 on the lower part of the bone plate 1 are set at an upward inclination. That is, the height of the end of the plate locking screw 12 on the lower part of the bone plate 1 near the bone plate 1 is lower than the height of the end implanted into the greater tubercle of the humeral head.

[0035] As a specific embodiment of the assembled intramedullary nail plate of the humerus provided by this utility model, please refer to Figures 1 to 5 The plate locking screw 12 on the right side of the middle part of the bone plate 1 is tilted to the left, and the plate locking screw 12 on the left side of the middle part of the bone plate 1 is tilted to the right.

[0036] For details, please refer to Figures 1 to 5 The bone plate 1 has two sets of edge locking holes 3 in the middle. The plate locking screw 12 located on the right side of the middle of the bone plate 1 is tilted to the left, that is, the end of the plate locking screw 12 on the right side of the middle of the bone plate 1 that is implanted into the greater tubercle of the humeral head is located on the left side of the end close to the bone plate 1; the plate locking screw 12 located on the left side of the middle of the bone plate 1 is tilted to the right, that is, the end of the plate locking screw 12 on the left side of the middle of the bone plate 1 that is implanted into the greater tubercle of the humeral head is located on the right side of the end close to the bone plate 1. The two sets of plate locking screws 12 in the middle of the bone plate 1 are arranged crosswise.

[0037] As a specific embodiment of the assembled intramedullary nail plate of the humerus provided by this utility model, please refer to Figures 1 to 5 The edge of the bone plate 1 is provided with multiple sets of suture holes 4, and the inner sidewall of the bone plate 1 is provided with suture grooves 5, which connect the sidewall of the suture holes 4 with the edge of the bone plate 1.

[0038] For details, please refer to Figures 1 to 5 Multiple sets of suture holes 4 are provided on the edge of the bone plate 1. Suture grooves 5 are provided on the inner sidewall of the bone plate 1. One end of the suture groove 5 is located on the sidewall of the suture hole 4, and the other end is located on the edge of the bone plate 1. There are five sets of suture holes 4. Two sets of suture holes 4 are provided at the upper end of the bone plate 1. The two sets of suture holes 4 are located between the two sets of edge locking holes 3 at the upper end of the bone plate 1 and are set along the width direction of the bone plate 1. Two sets of suture holes 4 are provided on the left side of the bone plate 1. The two sets of suture holes 4 on the left side of the bone plate 1 are staggered with the three sets of edge locking holes 3 on the left side of the bone plate 1. The suture holes 4 on the left side of the bone plate 1 are located between the two adjacent sets of edge locking holes 3 on the left side of the bone plate 1. One set of suture holes 4 is provided on the right side of the bone plate 1. The suture holes 4 on the right side of the bone plate 1 are located between the edge locking hole 3 in the middle and the lower edge locking hole 3 on the right side of the bone plate 1.

[0039] As a specific embodiment of the assembled intramedullary nail plate of the humerus provided by this utility model, please refer to Figures 1 to 5 The bone plate 1 has Kirschner wire holes 6 in the middle.

[0040] For details, please refer to Figures 1 to 5 Two sets of Kirschner wire holes 6 are provided, located between the suture hole 4 at the upper end of the bone plate 1 and the locking hole 2 in the middle. The two sets of Kirschner wire holes 6 are arranged along the width direction of the bone plate 1.

[0041] As a specific embodiment of the assembled intramedullary nail plate of the humerus provided by this utility model, please refer to Figure 1 Two sets of intramedullary locking nails 13 are provided at the lower part of the intramedullary nail 7.

[0042] For details, please refer to Figure 1 The intramedullary locking screw 13 is set through the lower part of the intramedullary nail 7. The intramedullary locking screw 13 is a cortical bone screw. The intramedullary locking screw 13 and the intramedullary nail 7 are located in the same plane. The intramedullary locking screw 13 is set at an angle downward, that is, the height of the end of the intramedullary locking screw 13 near the bone plate 1 is higher than the height of the other end away from the bone plate 1.

[0043] As a specific embodiment of the assembled intramedullary nail plate of the humerus provided by this utility model, please refer to Figure 1 The intramedullary locking nail 13 is positioned on the center line of the intramedullary nail 7.

[0044] For details, please refer to Figure 1 Both sets of intramedullary locking nails 13 are set on the center line of the intramedullary nail 7. The two sets of intramedullary locking nails 13 are set at an acute angle, and the tilt angle of the lower intramedullary locking nail 13 is greater than the tilt angle of the upper intramedullary locking nail 13.

[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. An assembled humeral intramedullary nail plate, characterized in that, The device includes a bone plate, an intramedullary nail, an intramedullary fixation screw, and a plate locking screw. The inner wall of the bone plate conforms to the lateral wall curve of the greater tubercle of the humeral head. The intramedullary nail is curved to conform to the shape of the humeral medullary cavity. A central locking hole is provided in the middle of the bone plate. The upper end of the intramedullary nail is located inside the central locking hole. The threaded portion of the intramedullary fixation screw passes through the central locking hole and matches the threaded screw hole at the upper end of the intramedullary nail. The bone plate is provided with multiple sets of edge locking holes in its circumference. The plate locking screw passes through the edge locking holes to fix the bone plate to the greater tubercle of the humeral head.

2. An assembled humeral intramedullary nail plate as claimed in claim 1, characterized in that The intramedullary fixation nail has a locking bevel on the side of the nail head near the threaded portion.

3. The assembled intramedullary nail plate of claim 2, characterized in that, A rotating groove is provided on the side of the nail head away from the threaded portion.

4. The assembled intramedullary nail plate of claim 1, characterized in that, The bone plate has three sets of edge locking holes on its left and right sides respectively.

5. An assembled humeral intramedullary nail plate as in claim 1, wherein, The locking pins on the upper part of the bone plate are inclined downwards, and the locking pins on the lower part of the bone plate are inclined upwards.

6. The assembled humeral intramedullary nail plate as described in claim 1, characterized in that, The locking pin on the right side of the middle portion of the bone plate is tilted to the left, and the locking pin on the left side of the middle portion of the bone plate is tilted to the right.

7. The assembled humeral intramedullary nail plate as described in claim 1, characterized in that, The bone plate has multiple sets of suture holes along its edge, and a suture groove is provided on the inner sidewall of the bone plate, the suture groove connecting the sidewall of the suture holes to the edge of the bone plate.

8. The assembled intramedullary nail plate of claim 1, characterized in that, The bone plate has Kirschner wire holes in the middle.

9. An assembled humeral intramedullary nail plate as in claim 1, wherein, The lower part of the intramedullary nail is provided with two sets of intramedullary locking nails.

10. The assembled humeral intramedullary nail plate as described in claim 9, characterized in that, The intramedullary locking nail is positioned on the centerline of the intramedullary nail.

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