Wisconsin Health Authorities also stated that patients reported using systems and equipment with open tanks and replaceable cartridges. Open systems allow users to customize their own steam infusions.
Dr. Minnesota chief pediatrician director Emily Chapman said she had treated four cases of acute, severe lung injury – including respiratory arrest – in teenagers who had fumes last month. Although hospital patients showed improvement, it was not clear whether they would fully recover.
She also found that examining a teenager's steam patterns can be difficult.
Dr. Chapman also said she was worried about how much the public believes steaming is safe.
Remember how long it took us to find out that cigarettes were linked to lung cancer. There is so much we do not know.
A recent study by Yale and Duke identified chemicals called acetals in some Juul-E cigarette fluids. These chemicals, according to the researchers, could be particularly irritating to the lungs and cause damage when inhaled.
Juul disagreed with the conclusions of the study.
"The hypothetical exposure analysis of the researchers did not take into account the conditions of the real world. including realistic human exposure to steam products like Juul, "said Lindsay Andrews, a Juul spokeswoman.
Juul pods contain a high nicotine content, which can cause addiction and health problems. Some experts are concerned about the effects of nicotine on a developing teen's brain, and some studies have found that taking nicotine may affect the heart and arteries as well.