1, physical disinfection method

Methods of killing or eliminating pathogenic microorganisms by physical factors. The commonly used physical disinfection method is moist heat disinfection. Using hot water (≥90℃) or steam with higher temperature as disinfection medium can denature or coagulate bacterial protein, lose its activity, cause metabolic disorder and kill microorganisms. The higher the humidity, the faster the denaturation and solidification in protein, and the better the killing effect on microorganisms. Bacterial propagules, viruses and fungi are all sensitive to damp heat. Humid heat disinfection uses high-temperature steam and hot water as disinfection media, which has the advantages of safety, no toxic residue and environmental protection. According to the relevant provisions, the physical disinfection method should be the first choice for instruments, appliances and articles that are resistant to moisture and heat.

2, chemical disinfection method

Methods of killing pathogenic microorganisms with chemical drugs. For instruments that are not resistant to damp heat, chemical disinfection can be used. Commonly used chemical disinfectants can be divided into high efficiency, medium efficiency and low efficiency disinfectants. Because chemical disinfectants are corrosive to instruments, we should choose them carefully. The selected chemical disinfectant should be disinfectant or acidic oxidation potential water approved by the health administrative department of the State Council.

Knowledge expansion

What disinfectant is better for disinfection of surgical instruments?

At present, there are two disinfectants commonly used in most hospitals:

1 and glutaraldehyde are highly effective disinfectants.

The disinfectant has the characteristics of wide sterilization spectrum, reliable sterilization effect, little influence of organic matter on sterilization and little corrosiveness to metals, etc., and is suitable for disinfection and sterilization of heat-resistant medical instruments and precision instruments, especially endoscopes. However, because glutaraldehyde is potentially toxic to human body and irritating to skin and mucosa, some people are actively looking for its substitute for sterilization of medical instruments such as endoscopes.

2. New Jieer disinfectant

The disinfectant has the efficacy of sterilization and scale removal, strong and rapid action, no corrosion to metals, no pollution to clothes, stable properties and easy storage, and belongs to disinfection and antisepsis drugs. Diluent can be used for preoperative hand washing (0.05~0. 1%, soaking for 5 minutes), skin disinfection and mold infection (0. 1%), mucosa disinfection (0.0 1~0.05%), instrument disinfection (6544 in 0./kloc-)