CDC: Microwave disinfection

Other sterilisation methods

Guidelines for disinfection and sterilization in healthcare facilities (2008)

Centers for Disease Control and Prevention (CDC)

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Other sterilisation methods

Guidelines for disinfection and sterilization in healthcare facilities (2008)

Centers for Disease Control and Prevention (CDC)

 

Microwave oven


Microwaves are used in medicine to disinfect soft contact lenses, dental instruments, dentures, milk and urinary catheters for intermittent 925-931 autocatheterization. However, microwaves must only be used with products that are compatible (e.g. It doesn't melt) 931. Microwaves are high-frequency waves that are typically used at a frequency of 2450 MHz. Microwaves create friction between water molecules in an alternating electric field. Intermolecular friction derived from vibrations generates heat, and some authors believe that the microwave effect depends on the heat produced, while others assume a nonthermal lethal 932-934 effect. Initial reports have shown that microwaves are an effective microbicide. The microwaves produced by a "home-type" microwave oven (2.45 GHz) completely inactivate bacterial cultures, mycobacteria, viruses and G spores. stearothermophilus within 60 seconds to 5 minutes depending on the infected organism 933, 935-937. Another study confirmed these results, but also found that microwave ovens with higher power 932 may be necessary for sterilization. Complete destruction of Mycobacterium bovis was achieved in 4 minutes of exposure to microwaves (600 W, 2450 MHz) 937. The effectiveness of microwave ovens for different sterilisation and disinfection purposes should be tested and demonstrated, as the test conditions affect the results (e.g. Presence of water, microwave energy). Sterilization of metal instruments can be done, but requires certain precautions. 926. Home microwave ovens may not have even distribution of microwave energy throughout the dry facility (there may be hot and cold spots on fixed medical devices); therefore, there may be areas that are not sterilized or sanitized. The use of microwave ovens to disinfect catheters with intermittent use has also been proposed. The researchers found that the tested bacteria (e.g. E. coli, Klebsiella pneumoniae, Candida albicans) were removed from the red rubber catheters within 5 minutes 931. Microwaves used for sterilization of medical devices have not been FDA cleared.

Adapted from source: https://www.cdc.gov/infectioncontrol/guidelines/disinfection/sterilization/other-methods.html
Centers for Disease Control and Prevention (CDC), National Center for Emerging and Zoonotic Infectious Diseases (NCEZID), Division of Healthcare Quality Promotion (DHQP)

Please note: the NBX DRA FIX drape contains a metal fixing wire which must be removed (ejected) before placing in the microwave !

 

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