What disinfection method of disinfectant immersion can be used for

It is possible to fabric, household appliances, the surface of the medical appliance and just the surface.

It can only be disinfected against bacterial and viral infections and is not effective against fungi and actinomycetes.

There are five commonly used chemical disinfectants:

First, 2% neutral glutaraldehyde aqueous solution, soaking time is 30 minutes, commonly used for the disinfection of blades, scissors, needles and microscopic instruments.

Second, 10% formaldehyde solution, soaking time of 20-30 minutes, suitable for the disinfection of resin, plastic and plexiglass products such as ureters and catheters.

3. 70% alcohol, soaking time 30 minutes, the use is the same as that of pentocele dialdehyde solution.

Fourth, 1:1000 benzalkonium bromide solution, soaking time is 30 minutes, although it can also be used for the disinfection of blades, scissors and needles, but because its disinfection effect is not as good as glutaraldehyde solution, it is often used for soaking of sterilized holding forceps.

Fifth, 1:1000 chlorhexidine solution, soaking time is 30 minutes, antibacterial effect is stronger than benzalkonium bromide.

The wrong operation when using the immersion disinfection method for disinfection is: Do not fill the lumen of catheters with disinfectant solution.

Commonly used disinfection and sterilization methods include: thermal disinfection, chemical disinfection, and ultraviolet disinfection.

Principle of thermal disinfection: high temperature can denature or coagulate the proteins and enzymes of microorganisms, lose their functions, and cause metabolism to be hindered and die, so as to achieve the purpose of disinfection and sterilization. In thermal disinfection, there are two categories: moist heat (e.g. autoclaving) and dry heat (including combustion or incineration).

The principle of chemical disinfection: one is to denature proteins, phenols, alcohols, aldehydes and heavy metals, etc., which can coagulate or denature proteins, so that the growth and reproduction of viruses are inhibited and die. The second is to interfere with the enzyme system, and the heavy metal salts can bind to the sulfhydryl (SH) enzymes of microorganisms, so that their activity decreases or disappears, thereby affecting the metabolism of pathogenic bacteria.

Oxidants and halogens can also oxidize certain enzyme systems in microorganisms. The third is to increase the permeability of the cell plasma membrane, and the detergent can reduce the surface tension of the cell membrane of pathogenic bacteria, increase the permeability of the cell membrane, and leak out of the substance in the bacterium, causing death.

The principle of ultraviolet disinfection: through ultraviolet irradiation, the DNA structure of microorganisms is destroyed and changed, so that bacteria die immediately or cannot reproduce offspring, so as to achieve the purpose of sterilization. Ultraviolet irradiation has low irradiation energy and weak penetration, and can only kill microorganisms that are directly irradiated.

Difference Between Disinfection and Sterilization

The purpose of disinfection is different from sterilization, disinfection is to kill most of the pathogenic microorganisms, only a small part of the pathogenic microorganisms survive, in order to achieve the purpose of not making the human body sick, sterilization is to kill all pathogenic microorganisms, has reached a completely sterile state, and the difficulty of sterilization is greater than the difficulty of disinfection.

Secondly, the places where the two are used and the items they handle are also different, most of the disinfection is used in public places, and sterilization is mainly used for medical items. Pay attention to personal hygiene and wash your hands before eating to avoid germs entering your body.