Correct use of biosafety cabinets to protect operators, samples, and working conditions

　　The function of bioclean safety cabinet is designed to protect the operator himself, the laboratory environment and the experimental material when operating the infectious experimental materials such as primary cultures, strains and diagnostic specimens, so as to avoid exposure to infectious aerosols and spills that may occur during the above-mentioned operation In the pharmaceutical production process, bioclean safety cabinet plays an important role
But in daily life, many people still have some misunderstandings about the cognition of bio-clean safety cabinet Such as the use of 100 levels of purification workbench instead of biological clean safety cabinets It is understood that most people feel that the two devices are the same shape, the role is certainly much the same, and think that their operating samples are ordinary samples, not highly pathogenic In fact, the biological clean safety cabinet and the 100-level purification workbench have a fundamental difference
One hundred levels of purification workbench will be through the high-efficiency filter of the purification air blowing down the work area, used to protect the sample, because the work area is a positive pressure area, air flow through the operating window overflow, only protect the sample, and the operator and the environment do not provide protection, such as the operation contains any known or potentially pathogenic aerosols, will bring a very large risk to the operator
The bioclean safety cabinet is a negative pressure purification workbench, can prevent operators and the environment from being exposed to the laboratory process produced by harmful aerosols, is a cage of infectious microorganisms, the correct operation of biosafety cabinet, can completely protect the operator, samples, working environment Therefore, hospital clinical testing, diagnosis, pathological analysis, the preparation of cancer drugs and related biomedical research institutes, laboratories should use biosafety cabinets
In addition, different levels of biosecurity laboratory should choose different levels of safety cabinets, but also according to the different types of maintenance, protection to select the appropriate safety cabinet According to the different structure design, exhaust ratio and maintenance target and maintenance degree, biosafety cabinets are divided into Level I, II and III, and II is divided into A1, A2, B1, B2
According to industry insiders, biosafety cabinets do not need to be "over-configured", such as in the operation of a small number of volatile chemical reagents or radionuclides, you can select a class II A2 safety cabinet, but also can choose a class II B1 safety cabinet;
In the selection of biosafety cabinet, should be based on the nature of work to meet the needs of work, ensure safety as the criterion, can not blindly pursue high-level, can not follow the medical equipment selection "advanced" thinking inertia, otherwise it will cause many problems For example, in the A2 can meet the use of the use of the use of the choice of B2 type, the result is not to require a large amount of energy consumption, because the B2 type is 100% of the outer exhaust type, exhaust volume up to 1600 cubic meters per hour, the general household exhaust fan exhaust volume of 80 cubic meters per hour
The role of bioclean safety cabinets is to effectively reduce the chanceof of laboratory acquired infections, reduce the chance of cross-contamination between humans and samples and samples, to protect operators, to protect the laboratory environment, and to protect the biosecurity of experimental materials The design of biosafety cabinets has been improved several times in the past few years, and through continuous improvements, bioclean safety cabinets have played a better role in safety protection