The emergence of needle-free syringes is an epoch-makin […]
The emergence of needle-free syringes is an epoch-making revolution in the field of medical appliances. The emergence of syringes is an epoch-making revolution in the field of medical appliances and the process of needle extraction or infusion of gas or liquid is called injection.
The syringe consists of a syringe with a small hole at the front end and a matching piston rod for injecting a small amount of liquid into the area that is inaccessible to other methods or from those places. The liquid is pulled out when the core rod is pulled out. Or the gas is drawn in from the small hole at the front end of the barrel, and the liquid or gas is squeezed out when the core rod is pushed in.
Generally use 2 ml, 5 ml, 10 ml or 20 ml syringes, occasionally 50 ml or 100 ml, and intradermal injection with 1 ml syringe. The syringe barrel can be either plastic or glass, and typically has a scale indication indicating the volume of liquid in the syringe. Glass syringes can be sterilized with autoclaves, but because modern syringes are less expensive to process, modern medical syringes are mostly made of plastic, which further reduces the risk of blood-borne diseases.
At present, disposable plastic syringes for clinical use are mostly made of polypropylene (PP). As a raw material for the manufacture of medical supplies, polypropylene has replaced the glass as the absolute position of the manufacturing material of the syringe because of its lightness, low cost, hygienic, high temperature resistance and easy processing. It is also used in other medical equipment such as medical catheters. The aspect has been widely used.
Polypropylene plastic syringes generally need to be provided in a sterile form, which is limited by the characteristics of the polypropylene material. At present, domestic polypropylene plastic syringes are generally sterilized by means of ethylene oxide sterilization. However, ethylene oxide sterilization will have some residue and cannot be used directly after sterilization.
Irradiation sterilization is a good alternative because it has strong penetrability, easy operation, fast sterilization and can be sterilized at room temperature, but it is sterilized against ethylene oxide sterilization. The cost of bacteria is relatively high.
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