The sealing effect at the needle of the disposable sterile injection needle is crucial in the process of medical injection, especially when it comes to special drugs such as sodium hyaluronate, the sealing mechanism is even more sophisticated and complex.
First of all, the disposable sterile injection needle uses high-quality medical stainless steel in the selection of manufacturing materials for the needle. This material itself has good corrosion resistance and stability, and can withstand the chemical erosion of drugs. At the same time, its surface has been finely processed and has extremely low roughness, which reduces the possibility of drug adhesion and penetration on the needle surface. A special welding or tight nesting process is used at the connection between the needle and the needle tube. Through high-precision automated equipment, the needle and the needle tube are seamlessly connected to ensure that the gap at the connection is extremely small and almost negligible, thereby effectively preventing the drug from leaking from the connection point.
The design of the needle tip also has a significant impact on the sealing effect. The needle tip is usually polished into an extremely sharp and smooth shape, so that during the puncture process, it can penetrate the skin or tissue with minimal resistance, reduce damage to surrounding tissues, and avoid drug leakage caused by unsmooth puncture. In addition, the diameter and inner wall smoothness of the internal channel of the needle tip are strictly controlled. The precise inner diameter size allows the drug to maintain a stable flow rate when passing through, and the smooth inner wall reduces the friction between the drug and the needle wall, preventing the drug from leaking due to friction retention.
In addition, some advanced disposable sterile injection needles are also equipped with a special sealing coating at the needle tip. This coating is usually made of a polymer material with good biocompatibility, which can form an extremely thin and uniform protective film on the surface of the needle. This film can not only further fill the tiny pores that may exist on the surface of the needle tip and enhance the sealing performance, but also play a lubricating role, allowing the drug to pass through the needle tip more smoothly, but also prevent the drug from directly contacting the metal material of the needle tip, reducing the risk of leakage caused by chemical reactions. During the packaging process, the injection needle is sealed in a sterile packaging environment. The packaging material provides additional protection and fixation for the needle, preventing the needle from being affected by external forces and damaging the sealing structure during transportation and storage, ensuring that the needle is always in a good sealing state before use, providing reliable guarantee for accurate and safe injection operations.
