Health
Electric cookers are a simple and efficient way to disinfect N95 masks, and research results
A dry electric multi-cooker for 50 minutes, one 212 F cooking cycle will decontaminate the N95 respirator without the use of chemicals, without compromising filtration or compatibility. Credit: Chamteut Oh
Owners of electric multicookers may be able to add another use to their list of features, a new study suggests: N95 mask disinfection.
According to a study at the University of Illinois at Urbana Champaign, 50 minutes of dry heat with an electric rice cooker such as a rice cooker or instant pot sterilizes the inside and outside of the N95 ventilator, filtration And fit. This allows the wearer to safely reuse a limited supply of ventilators that were originally intended to be disposable items.
Researchers led by Thanh “Helen” Nguyen, a professor of civil environmental engineering and Vishal Verma, published their findings in a journal Environmental Science and Technology Letter..
The N95 mask is the gold standard for personal protection to protect the wearer from airborne droplets and particles, such as the coronavirus that causes COVID-19.
“A cloth or surgical mask protects others from splashes that the wearer may release, but the mask filters to protect the wearer Small particles It may carry a virus,” Nguyen said.
The high demand during the COVID-19 outbreak has Healthcare providers And urge the search for other essential workers, creative approaches to disinfection.
The towel prevents the mask from touching the heating elements on the bottom of the cooker. Credit: Chamteut Oh
“There are various ways to disinfect something, but most of them destroy the filtration and compatibility of N95 masks,” Verma said. “Every hygiene method needs to decontaminate all surfaces of the ventilator, but equally important is to maintain the filtration effect and fit of the ventilator on the wearer’s face. If they do not, they will not provide adequate protection.”
The researchers hypothesized that dry heat could be a way to meet all three criteria: decontamination, filtration, and compliance without leaving special preparations or chemical residues. They also wanted to find a way for people at home to have wide access. They decided to test an electric cooker, a type of device that many people have in their pantry.
They found that one cooking cycle that maintained the contents of the cookware at about 100 degrees Celsius or 212 degrees Fahrenheit for 50 minutes decontaminated the mask from the inside and the outside from four different classes of viruses, including coronavirus. Checked and done more effectively. Than ultraviolet light. Next, we tested filtration and compatibility.
“I built a chamber in a laboratory that tested aerosols, examined the filtration of an N95 ventilator, and measured the particles that passed through it,” Verma said. “The ventilator maintained a fit, while still properly fitted to the wearer’s face, after maintaining 20 cycles of decontamination in the electric cooker and maintaining a filtration capacity of over 95%.”
The researchers video Method demonstration. They note that the heat must be dry heat. Do not add water to the rice cooker, keep the temperature at 100 degrees Celsius for 50 minutes and cover the bottom of the cookware with a small towel to keep part of the ventilator out. Direct contact with heating element. However, multiple mask Nguyen said it could be stacked and placed in a rice cooker at the same time.
Researchers said that electric cooking health care worker First responders, especially those who cannot use large scale heat sterilizers in small clinics or hospitals. In addition, it may help others who may have N95 Ventilator According to Nguyen, he wants to reuse it at home (eg from a pre-pandemic housing improvement project).
Chamteut Oh et al, dry heat as a decontamination method for N95 Respirator Reuse, Environmental Science and Technology Letter (2020). DOI: 10.1021 / acs.estlett.0c00534
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University of Illinois Urbana Champaign
Quote: Electric rice cooker is an easy and efficient way to sanitize N95 masks. The survey results (August 7, 2020) were obtained from August 7, 2020 https://medicalxpress.com/news/2020-08-electric-cooker-easy-efficient-sanitize. html
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