Intramedullary needle for treating fracture and convenient to hold

Abstract

The utility model discloses an intramedullary needle for treating fracture and convenient to hold, which is provided with a treatment section and a holding section for operating and holding, and a positioning structure for holding and positioning is further arranged on the holding section. The intramedullary needle conforms to tubular bone biological fixation, the treatment section can be effectively prevented from rotating in the surgical treatment operation process through the holding section, the penetration depth and path of the treatment section can be further accurately controlled, the treatment accuracy is improved, and the treatment duration is shortened. When the intramedullary needle is used in the treatment process of metacarpal bone fracture, further damage to fracture local hematoma and periosteum can be avoided through closed reduction, blood supply of sclerotin is protected, and fracture healing is facilitated. The intramedullary needle is small in trauma, small in wound scar and beneficial to attractiveness; intramedullary fixation retains the minimally invasive characteristic of kirschner wire fixation, and the fixing effect is more stable and lasting than that of a kirschner wire, and the articular surface is not damaged.

Description

Technical Field

[0001] This application relates to the field of fracture treatment technology, and more particularly to an intramedullary nail for treating fractures that is easy to hold. Background Technology

[0002] Metacarpal fractures are among the most common injuries of the upper limb, accounting for approximately 10% of all fractures. For metacarpal fractures with significant displacement and unstable results after closed reduction, surgical treatment is currently the preferred option. Metacarpal fractures are classified into head, neck, shaft, and base fractures. Treatment methods include closed reduction and external fixation, external fixation with a fixator, internal fixation with Kirschner wires, internal fixation with screws, internal fixation with mini-plates, and fixation with shape memory alloy rings, among others.

[0003] Currently, when using Kirschner wire fixation, the relative stability is poor, and it is easy to damage the joint surface. Therefore, early functional exercises are generally not recommended (see attached). Figure 6 (as shown); however, using miniature steel plates is expensive, and serious complications such as plate breakage, tendon adhesion, and nonunion of fractures may occur after fixation (as shown in the attached image). Figure 7 As shown in the figure, etc. Intramedullary nailing for the fixation of long tubular bone shaft fractures is widely recognized as a standard treatment method. However, due to instrument limitations, the use of intramedullary nails for metacarpal fractures has not been widely adopted in China. For example, the intramedullary nail is difficult to hold, which affects the precision of treatment during the operation. Summary of the Invention

[0004] To address the aforementioned problems, this application aims to provide an intramedullary nail for treating fractures that is easy to hold. This intramedullary nail conforms to the biological fixation of tubular bones, and the holding segment can effectively prevent rotation of the treatment segment during surgical procedures. Furthermore, it allows for precise control of the insertion depth and path of the treatment segment, thereby improving treatment accuracy and shortening treatment time.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows: an intramedullary nail for treating fractures and easy to hold, the intramedullary nail having a treatment section and a holding section for operation and holding, and a positioning structure for holding and positioning is also provided on the holding section.

[0006] Preferably, the gripping section has a rectangular flat structure.

[0007] Preferably, the positioning structure is a groove and a protrusion structure continuously provided on the grip section, and the groove and the protrusion together form a corrugated grip section.

[0008] Preferably, the gripping section and the treatment section are detachably connected.

[0009] The beneficial effects of this application are:

[0010] (1) The intramedullary nail conforms to the biological fixation of tubular bone. By holding the segment, it can effectively prevent the rotation of the treatment segment during the surgical treatment operation, and further, it can precisely control the insertion depth and path of the treatment segment, improve the accuracy of treatment and shorten the treatment time.

[0011] (2) When using the intramedullary nail of this application to treat metacarpal fractures, closed reduction can avoid further damage to the local hematoma and periosteum, protect the blood supply to the bone, and promote fracture healing.

[0012] (3) The use of intramedullary nails results in less trauma and smaller scars, which is beneficial to aesthetics; intramedullary fixation retains the minimally invasive characteristics of Kirschner wire fixation, and its fixation effect is more stable and durable than that of Kirschner wires, without damaging the joint surface. Attached Figure Description

[0013] Figure 1 This is a diagram illustrating the disassembly structure of the intramedullary needle thread in this application.

[0014] Figure 2 This illustration shows the intramedullary treatment of the metacarpals in this application.

[0015] Figure 3 This illustration shows the deflection of the intramedullary needle during treatment, as described in this application.

[0016] Figure 4 The gripping segment is shown as a flat structure in this application.

[0017] Figure 5 The gripping segment is illustrated as a wave structure in this application.

[0018] Figure 6 This is a diagram illustrating the fracture structure of the holding segment and the treatment segment in this application.

[0019] Figure 7 This illustration shows the current treatment method using Kirschner wires.

[0020] Figure 8 This illustration shows the current treatment method using miniature steel plates. Detailed Implementation

[0021] To enable those skilled in the art to better understand the technical solutions of this application, the technical solutions of this application will be further described below in conjunction with the accompanying drawings and embodiments.

[0022] See attached document Figures 1-6 An intramedullary nail for treating fractures and easy to hold is shown. The intramedullary nail 1 has a treatment section 11 and a holding section 12 for operation and gripping. Figure 1As shown, by holding the gripping segment 12, the circumferential rotation of the treatment segment 11 can be effectively restricted. Thus, when using the intramedullary nail 1 for fracture treatment, the state of the treatment segment 11 can be stably restricted, which means that the intramedullary nail 1 can be accurately guided to the treatment position, improving the accuracy of fracture treatment and shortening the treatment time.

[0023] Because the intramedullary nail 1 typically has a small outer diameter, its stability during the gripping process of the holding segment 12 needs improvement. Therefore, to address this issue, a positioning structure for gripping and positioning is provided on the holding segment 12. This positioning structure further enhances the gripping stability of the holding segment 12, thereby improving the accuracy of gripping and positioning of the holding segment 12 and the entire intramedullary nail 11, and further improving the precision of driving the intramedullary nail 1 during treatment.

[0024] Specifically, such as Figure 1 As shown, the holding segment 12 is located at the rear end of the treatment segment 11, and the holding segment 12 and the treatment segment 11 together constitute a hook-shaped intramedullary needle 1. Figure 2 As shown, during treatment using the intramedullary nail 1, by holding the holding segment 12, the circumferential rotation of the treatment segment 11 can be significantly restricted, thereby ensuring the stability of the intramedullary nail 1 displacement during treatment.

[0025] When holding the aforementioned gripping section 12, it is usually held with the thumb and index finger, or with the middle finger attached. The cylindrical gripping section 12 will still rotate relative to the fingers. Figure 3 As shown in the diagram, therefore, to improve the grip stability of the gripping segment 12, as... Figure 4 As shown, the gripping section 12 has a rectangular flat structure in cross-section. When gripped by the thumb and forefinger, the flat gripping section 12 can effectively restrict the rotation of the gripping section 12 compared to the cylindrical gripping section, thereby further improving the stability of the treatment section 11 in the gripping state.

[0026] During the treatment process using the intramedullary nail 1, the treatment segment 11 needs to be inserted axially. Therefore, during this axial insertion of the treatment segment 11, the thumb and index finger still slide on the flat gripping segment 12. To address this sliding problem during treatment, such as... Figure 5As shown, the positioning structure consists of grooves 1a and protrusions 1b continuously arranged on the gripping section 12, and the grooves 1a and protrusions 1b together form a corrugated gripping section 12. During the gripping operation of the intramedullary needle 1, the thumb and index finger can grip the corresponding grooves 1a on the upper and lower surfaces of the gripping section 12. The grooves 1a and protrusions 1b create an uneven surface structure on the gripping section 12, effectively ensuring the relative positioning of the fingers and the intramedullary needle 1 during the gripping operation, especially during the axial insertion of the treatment section 11, thus making the insertion depth and path of the treatment section 11 more accurate during treatment.

[0027] During treatment, because the grasping segment 12 cannot enter the metacarpal bone while in a grasping state, it is necessary to avoid the grasping segment 12 being located outside the metacarpal bone after treatment, which could lead to collisions or other adverse effects. Therefore, if... Figure 1 As shown, the holding section 12 and the treatment section 11 are detachably connected. Preferably, the holding section 12 and the treatment section 11 are threadedly connected. After treatment, the holding section 12 can be rotated to detach it from the treatment section 11, thereby avoiding leakage of the intramedullary needle 1 and causing further damage.

[0028] And further as Figure 6 As shown, the holding section 12 and the treatment section 11 are an integral structure, and a fracture notch a is provided on the surface at the junction of the two. After treatment, it can be... Figure 6 As shown in the lower figure, a force is applied to the gripping section 12, causing the gripping section 12 to break from the treatment section 11, thereby quickly completing the disassembly operation of the gripping section 12.

[0029] The intramedullary nail 1 disclosed in this application preferably uses a 2.5 mm diameter needle as the base for needle making, and the needle tail is bent to facilitate gripping; a 2.0 mm needle is used as the material for making the intramedullary nail, the tip is cut off to prevent self-injury, and it is bent at 20° 1.0 cm from the end. The upper and lower surfaces of the gripping section 12 are pressed into a planar structure by mechanical external force, that is, the gripping section 12 with a flat structure is formed; finally, the two sides of the gripping section 12 are bent into a corrugated structure with grooves 1a and protrusions 1b by mechanical external force.

[0030] When performing surgery using the intramedullary nail 1 disclosed in this application: make a 0.8cm transverse incision near the base of the metacarpal bone, cut the skin, bluntly dissect to avoid damaging the nerves and extensor tendons, open the medulla oblongata at the base of the metacarpal bone, confirm the correct position with fluoroscopy, remove the intramedullary nail, and at the same time reposition, insert the self-made intramedullary nail through the medullary opening, as far as possible below the articular surface of the metacarpal head, place the tail of the nail under the skin, and suture the wound.

[0031] The foregoing has shown and described the basic principles, main features, and advantages of this application. Various changes and modifications may be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims.

Claims

1. An intramedullary nail for treating fractures and easy to hold, characterized in that: The intramedullary needle (1) has a treatment section (11) and a gripping section (12) for operation and holding, and a positioning structure for gripping and positioning is also provided on the gripping section (12).

2. The intramedullary nail for treating fractures and easy to hold according to claim 1, characterized in that: The gripping section (12) has a rectangular flat structure in cross-section.

3. The intramedullary nail for treating fractures and easy to hold according to claim 2, characterized in that: The positioning structure is a groove (1a) and a protrusion (1b) continuously provided on the grip section (12), and the groove (1a) and the protrusion (1b) together form a corrugated grip section (12).

4. The intramedullary nail for treating fractures and easy to hold according to claim 3, characterized in that: The gripping section (12) and the treatment section (11) are detachably connected.

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