May 26, 2022 #1 Local News, Forum, Information and Event Source for Venice Beach, California.

UCLA Study Finds Single-Use N95 Respirators Can Be Decontaminated and Used Again

N95 respirators, which are widely worn by health care workers treating patients with COVID-19 and are designed to be used only once, can be decontaminated effectively and used up to three times, according to research by UCLA scientists and colleagues.

An early-release version of their study has been published online, with the full study to appear in September in the journal Emerging Infectious Diseases.

N95 respirators reduce exposure to airborne infectious agents, including SARS-CoV-2, the virus that causes COVID-19, and are one of the key pieces of personal protective equipment used by clinical workers in preventing the spread of the virus. Critical shortages of these masks have driven efforts to find new decontamination methods that can extend their use.

“Although N95 respirators are designed for just one use before disposal, in times of shortage, N95 respirators can be decontaminated and reused up to three times,” said James Lloyd-Smith, a co-author of the study and a UCLA professor of ecology and evolutionary biology. “But the integrity of the respirator’s fit and seal must be maintained.”

In a controlled laboratory setting, the researchers tested several decontamination methods on small sections of N95 filter fabric that had been exposed to SARS-CoV-2. The methods included vaporized hydrogen peroxide, dry heat at 70 degrees Celsius (158 degrees Fahrenheit), ultraviolet light and a 70% ethanol spray. All four methods eliminated detectable viable virus traces from the N95 fabric test samples.

The investigators then treated fully intact, clean respirators with the same decontamination methods to test their reuse durability. Employees with the National Institutes of Health’s Rocky Mountain Laboratories in Montana volunteered to wear the masks for two hours to determine if they maintained a proper fit and seal over the face. The scientists decontaminated each mask three times, using the same procedure with each.

The masks treated with vaporized hydrogen peroxide experienced no failures, suggesting they potentially could be reused three times, Lloyd-Smith said. Those treated with ultraviolet light and dry heat began showing fit and seal problems after three decontaminations, suggesting these respirators potentially could be reused twice.

The study authors concluded that vaporized hydrogen peroxide was the most effective method because no traces of the virus could be detected after only a 10-minute treatment. They found that ultraviolet light and dry heat are also acceptable decontamination procedures, as long as the methods are applied for at least 60 minutes.

The ethanol spray, the scientists discovered, damaged the integrity of the respirator’s fit and seal after two sessions, and they do not recommend it for decontaminating N95 respirators.

The researchers stressed that anyone decontaminating an N95 respirator should closely check the fit and seal over the face before each reuse.

Co-authors of the study include Amandine Gamble, a UCLA postdoctoral researcher in Lloyd-Smith’s laboratory, as well as researchers with Rocky Mountain Laboratories, part of the NIH’s National Institute of Allergy and Infectious Diseases.

From UCLA Newsroom

Related Posts

Venice Pride Festival and Parade Around the Corner

May 24, 2022

May 24, 2022

Live music, DJ sets, Sunday parade and more come to Venice Beach Recreation Center June 4 & 5  By Staff...

Mar Vista Man Accused of Hoarding Bunnies in Backyard

May 24, 2022

May 24, 2022

Hundreds of rabbits remain in the backyard of local man Animal rights activists accuse a Mar Vista man of hoarding...

Venice High School Lockdown Lifted After No Weapons Found On Campus: YO! Venice Show – May 23rd, 2022

May 23, 2022

May 23, 2022

Local news and culture in under 5 minutes.*  Venice High School Lockdown Lifted After No Weapons Found On Campus*  Dior...

Los Angeles Metro Sees 15.9 Percent Increase in Median Rent

May 20, 2022

May 20, 2022

Median rent of $2,258, according to recent report By Dolores Quintana The ongoing pandemic has exacerbated the issues of housing...

Three-Story Venice Canals Speculative Home on Market for $7.6 Million

May 20, 2022

May 20, 2022

Four-bedroom and five-and-a-half-bathroom home for sale By Dolores Quintana A speculative home built on the Venice Canals in Los Angeles...

Fight Breaks out on Venice Beach After Man Films Female Sunbathers

May 20, 2022

May 20, 2022

A fight broke out on Venice Beach this week after a man refused to stop taking pictures of a group...

Interview With CD-11 Candidate Jim Murez

May 20, 2022

May 20, 2022

By Nick Antonicello The following is an interview with Jim Murez, a candidate for Mike Bonin’s soon-to-be-vacant seat on Los...

CD-11 Profile: The Allison Holdorff-Polhill Interview

May 20, 2022

May 20, 2022

Nick Antonicello speaks to council candidate Allison Holdorff-Polhill on homelessness, city finances and the current and future state of the...

Motional And UberEats Launch Autonomous Deliveries In Santa Monica

May 18, 2022

May 18, 2022

There Are Plans For Expansion Into The Rest Of Los Angeles Motional, a global driverless technology leader, and Uber Technologies...

Cacio e Pizza Is Lemonade Founder’s New Restaurant In Playa Vista

May 18, 2022

May 18, 2022

Proposed Restaurant Will Have Seating For 86 Inside And 64 Outside Cacio E Pizza is the newest restaurant from Lemonade...

Only 10 Vaquita Porpoises Survive, But The Species May Not Be Doomed

May 17, 2022

May 17, 2022

Hope remains for the porpoise species not only survive but thrive with human help. By Stuart Wolpert The vaquita porpoise,...

The American Cinematheque Brings “Bleak Week” To Santa Monica’s Aero Theatre And The Los Feliz Three Theatre

May 17, 2022

May 17, 2022

33 Films From 18 Countries In One Week. By Dolores Quintana Sometimes when things are tough and you’re feeling down,...

SMPD and LAPD Officers Search For Attempted Carjacking

May 16, 2022

May 16, 2022

The officers were unable to locate the suspect.  By Dolores Quintana The Santa Monica Police Department with an assist from...

The price of gasoline in Los Angeles County Has Experienced The Largest Increase Since February

May 16, 2022

May 16, 2022

Gasoline prices in Orange County Have Also Increased By Dolores Quintana Regular self-serve gasoline in the county of Los Angeles...

Enough Is Enough: Mayoral Candidate Mel Wilson, CD-11 Hopefuls Holdorff-Polhill & Lloyd Visit Conditions At Centennial Park

May 16, 2022

May 16, 2022

All three call for “Real Data Reform” to solve the homeless equation here in Venice! By Nick Antonicello An unusual...