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Cautionary tales: Mustaches, home oxygen therapy, sparks do not mix
Date:6/23/2014

Rochester, Minn. Facial hair and home oxygen therapy can prove a dangerously combustible combination, a Mayo Clinic report published in the peer-reviewed medical journal Mayo Clinic Proceedings finds. To reach that conclusion, researchers reviewed home oxygen therapy-related burn cases and experimented with a mustachioed mannequin, a facial hair-free mannequin, nasal oxygen tubes and sparks. They found that facial hair raises the risk of home oxygen therapy-related burns, and encourage health care providers to counsel patients about the risk.

MULTIMEDIA ALERT: Video and audio are available for download on the Mayo Clinic News Network.

More than 1 million people in the United States use home oxygen therapy, and it is on the rise around the world, especially in countries where smoking is increasing, the researchers say.

Mustaches and other facial hair can act as kindling for nasal oxygen tubes when a spark joins the mix, even if the spark is just a tiny ember that flies at an oxygen tank user from a match, grill or fireworks.

"They can have very bad facial burns and airway burns also," says senior author Andrew Greenlund, M.D., Ph.D., a Mayo Clinic primary care physician who conducted the research with his wife, Mayo physician Laura Greenlund, M.D., Ph.D., and Mayo medical resident Bradley Anderson, M.D. "When fire burns the airway, then you have swelling and tissue death. It can be very dangerous."

Using the Greenlunds' garage, the researchers experimented with a mannequin with a mustache made from human hair and a mannequin without facial hair. They drilled nostrils into the mannequins and inserted nasal tubes, known as nasal cannula tubing, and connected the tubes to a home oxygen tank. With oxygen flowing at 2 liters per minute, a level similar to that used in home oxygen therapy, they exposed the mannequins to sparks. The nasal oxygen tubes on the facial hair-free model didn't ignite; on the mustachioed mannequin, the oxygen tubes ignited and the mustache went up in flames.

The researchers' review of Mayo medical charts found nine men with home oxygen therapy-related burns between 1994 and 2013: Eight of the nine had facial hair when they were burned.

Dr. Andrew Greenlund has treated home oxygen therapy patients whose nasal oxygen tubes ignited while they were grinding lawn mower blades, were hit in the mustache by an ember when someone else lit a match or were smoking.

"It can be what you might think are innocuous or benign things," Dr. Greenlund says of potential ignition sources. "But with the facial hair and oxygen, it can be a real risk."

The Mayo findings are supported by an earlier study by National Aeronautics and Space Administration researchers. They found that while hair is only marginally flammable in normal room air, the risk rises exponentially in an oxygen-enriched environment.

Patients receiving home oxygen therapy can lower their risk of burns by shaving facial hair, using water-based hair gels rather than hair products that contain alcohol or oil, using humidified oxygen, and of course by avoiding sparks and flames, the researchers say.


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Contact: Sharon Theimer
newsbureau@mayo.edu
507-284-5005
Mayo Clinic
Source:Eurekalert

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