This article statistically analyzes and discusses the problems in national supervision sampling of vertical mode steam sterilizers in 2014. For improving product quality, strengthening the supervision and management, it provides a reference.
Steam ; Sterilization ; methods ; standards

Using the all closed covering low-temperature method, we successfully made the packaging and sampling of ethylene oxide standard.
Ethylene Oxide ; standards ; Sterilization ; instrumentation ; methods

OBJECTIVE: To compare three sterilizing methods for reusable medical goggles. METHODS: A total of 180 medical goggles of the same brand and same model were randomly divided into three groups. In group A the goggles were first soaked with 2000 mg/L chlorine-containing disinfectant and then cleaned manually; goggles in other two groups were sterilized using pre-programmed automatic spray cleaning and disinfection machine, the disinfection program was set to 90 ℃ for 5 min in group B and 70 ℃ for 30 min in group C. The quality of the sterilization was monitored by visual inspection with luminous magnifying glass and residual protein detection assay. User satisfaction on cleanliness of medical goggles, clarity of mirror surface and suitability of elastic bands was investigated with questionnaire survey. RESULTS: The qualification rates verified by visual inspection were 82.4%, 84.6%and 98.3%in group A, B and C, respectively, the qualification rate in group C was significantly higher than those in group B and group C (all CONCLUSIONS Machinery sterilization set 70 ℃ for 30 min has better cleaning and sterilizing effects for reusable medical goggles.
Eye Protective Devices/standards* ; Sterilization/methods* ; Surveys and Questionnaires

OBJECTIVE: To establish reuse process of positive pressure powered air-filter protective hoods during coronavirus disease 2019 (COVID-19) epidemic. METHODS: The procedure of pretreatment, storage, recovery, cleaning, disinfection and sterilization process of positive pressure powered air-filter protective hoods, which were used in the treatment of COVID-19 infection patients was established in Central Sterile Supply Department of the hospital. The cleaning and disinfection effects of the protective hoods after treatment were examined by magnifying glass method, residual protein detection method, real-time PCR, and agar pour plate method. RESULTS: Twenty five used protective hoods underwent totally 135 times of washing, disinfecting and sterilizing procedures. After washing, all the protein residue tests and COVID-19 nucleic acid tests showed negative results. After sterilizing, all the protective hoods met sterility requirement. All the tested protective hoods were undamaged after reprocessing. CONCLUSIONS The established reuse procedures for used positive pressure powered air-filter protective hoods are safe.
Air Filters/virology* ; Betacoronavirus ; COVID-19 ; Coronavirus Infections/prevention & control* ; Disinfection/standards* ; Equipment Reuse/standards* ; Pandemics/prevention & control* ; Pneumonia, Viral/prevention & control* ; SARS-CoV-2 ; Sterilization/standards*

Drugs, Chinese Herbal ; isolation & purification ; standards ; Hot Temperature ; Microwaves ; Plants, Medicinal ; chemistry ; Quality Control ; Sterilization ; Technology, Pharmaceutical ; methods

INTRODUCTIONThe Singapore General Hospital Bone Bank, which exclusively stores femoral head allografts, relies on flash sterilisation to prevent allograft-related disease transmission and wound infection. However, intraosseous temperatures during autoclaving may be lower than required to eliminate human immunodeficiency virus, and hepatitis B and C viruses. The aim of this study is to determine the intraosseous temperatures of femoral head allografts during autoclaving and to assess the adequacy of autoclaving in preventing disease transmission.

METHODSSix femoral heads were acquired from patients who underwent hip arthroplasty. The specimens were divided into two groups. The first group underwent flash sterilisation with a sterilisation time of 4 min, while a longer sterilisation time of 22 min was used for the second group.

RESULTSThe highest core temperature in the first group was 130°C, while the core temperatures in the second group plateaued at 133°C for all allografts. In the first group, only smaller allografts maintained temperatures sufficient for the inactivation of the clinically relevant viral pathogens. In contrast, all allografts in the second group were terminally sterilised.

CONCLUSIONThere is an inverse correlation between the size of allografts and intraosseous temperatures achieved during autoclaving. Therefore, we recommend dividing large allografts into smaller pieces, in order to achieve intraosseous temperatures adequate for the elimination of transmissible pathogens during flash sterilisation. Allografts should not be terminally sterilised, as the resulting allografts will become unusable. Despite modern processing techniques, stringent donor selection remains vital in the effort to prevent allograft-related infections. Autoclaving is an economical and efficacious method of preventing allograft-related disease transmission.

Allografts ; Blood-Borne Pathogens ; Bone Transplantation ; instrumentation ; Disease Transmission, Infectious ; prevention & control ; Disinfection ; methods ; standards ; Equipment Contamination ; prevention & control ; Femur Head ; microbiology ; transplantation ; Humans ; Sterilization ; methods ; Temperature

OBJECTIVETo discuss the possibility of hepatitis B virus (HBV) transmission through dental handpieces.

METHODSInvestigation was carried on methods for disinfecting and sterilizing dental handpieces and the condition of HBsAg contamination on dental handpieces before and after disinfection and sterilization by randomly sampling all special stomatological hospitals and dental clinics in a same city and 10 dental departments from the third, second and first class hospitals. The possibility of HBV transmission through dental handpieces was probed by investigating whether ducks can be infected by bath liquid of dental handpieces contaminated by DHBV, while in such bath liquid, DHBV can not be detected by serum dot hybridization.

RESULTSFrom 2001 to 2004, in methods to disposing dental handpieces, the use of autoclave was remarkably increased while of the disinfectant wipe, immersion and other methods was remarkably decreased. The positive rate of HBsAg from dental handpieces in practice was 1.65%. It was evident that the bath liquid of dental handpieces contaminated by DHBV can conduct infection in vivo test of duck, while DHBV can not be detected in such bath liquid by serum dot hybridization, it is proved that the negative result of HBsAg in non-sterilized dental handpieces can not eliminate the possibility of HBV transmission through dental handpieces.

CONCLUSIONThere might exist the possibility of HBV transmission through dental handpieces however, the autoclaves might kill the virus contaminating on dental handpieces.

Animals ; DNA, Viral ; blood ; Dental Instruments ; virology ; Ducks ; virology ; Equipment Contamination ; Hepatitis B ; transmission ; Hepatitis B Virus, Duck ; genetics ; isolation & purification ; Sterilization ; methods ; standards