Intramedullary nail device and medication thereof

Abstract

The invention discloses an intramedullary nail device, comprising a nail body, locking nail holes which are transversely arranged at the proximal and distal ends of the nail body and a locking nail which is penetrated in the locking nail holes, at least one side channel is arranged along the axial direction of the nail body, and in which a drug sustained release bead or a bead chain is arranged; the intramedullary nail of the invention is arranged and fixed in the medullary cavity strictly in accordance with the requirements of sterile operation, after that, the drug sustained release bead or the bead chain carries out the sustained release of the drug effect by an opening of the side channel, thus maintaining the long-term effective antibacterial concentration of the environment in the cavity and further achieving the purposes of preventing and treating the infections.

Description

technical field [0001] The present invention relates to a medical device, which is an internal fixation device for treating fractures, especially an intramedullary nail device for primary internal fixation of infectious or open bone fractures and a drug delivery device using the device. method. Background technique [0002] The interlocking intramedullary nail belongs to the central axis internal fixation system, rarely strips the periosteum, and protects the blood supply of the fracture end to the greatest extent. The fixation frame has a higher bone union rate and becomes the first choice for internal fixation of tibial diaphysis fractures. However, highly violent or infectious fractures are often accompanied by tissue defects and severe blood supply damage, local anti-infection ability is low, coupled with external pollution and open medullary cavity, bacteria can easily enter the medullary cavity and reproduce. When the intramedullary nail is implanted at this time, ba...

AI Technical Summary

Problems solved by technology

Although this patent can solve some of the above problems, there are still many shortcomings, such as the degradable polymer material is harmful to the human body, the antibiotic layer bonded by the adhesive is easy to fall off and cause secondary pollution in the cavity, and the operation is relatively complicated.

Another Chinese patent number is: 200520135401.4 improves the existing interlocking intramedullary nail. A central pipeline is axially opened in the nail body, and several side holes are provided on the nail body to communicate with the central pipeline. The central pipeline is connected with the catheter and the injection pump, and the nail body is fixed in the bone cavity during clinical use. During the operation, one end of the catheter is left in the body and connected to the nail tail interface, and the other end is led out of the skin and connected to the injection pump. The syringe pump injects antibiotic liquid into the nail body, and the liquid flows from the catheter, the central pipe, and the side holes to the tissues around the lesion pole to achieve the purpose of antibacterial and anti-inflammatory. This design itself has some disadvantages: first, hang the syringe pump on the In vitro; it is inconvenient to move and carry, and secondly, the medicine liquid is transfused in a short time, and it cannot form a continuous environment for inhibiting bacterial growth and sterilization in the tissues around the lesion for a long time. Thirdly, it is due to in vitro administration and wounds , it is easy for germs to invade and cause secondary infection. What is more serious is that some granulation tissue adheres to the nail body and easily blocks the side hole, resulting in poor infusion, and the drug cannot reach the lesion at all.

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