Researchers reviewed lung biopsies from 17 patients, all of whom had vaped and were suspected to have vaping-associated lung injury. The study was the first to examine a group of biopsies from patients with lung injury due to vaping. Researchers found no evidence of tissue injury caused by accumulation of lipids -- fatty substances such as mineral oils -- which has been suspected as a possible cause of the lung injuries associated with vaping.
"While we can't discount the potential role of lipids, we have not seen anything to suggest this is a problem caused by lipid accumulation in the lungs. Instead, it seems to be some kind of direct chemical injury, similar to what one might see with exposures to toxic chemical fumes, poisonous gases and toxic agents," says Brandon Larsen, M.D., Ph.D., a surgical pathologist at Mayo Clinic Arizona, and a national expert in lung pathology.
Centers - Disease - Control - Prevention - CDC
The Centers for Disease Control and Prevention (CDC) has reported more than 800 lung injury cases that are associated with electronic cigarette use, or vaping, over the past few months. Twelve deaths have been confirmed in 10 states, and investigative findings suggest that products containing THC -- the principal psychoactive compound in marijuana -- or other cannabis oils, such as cannabidiol or CBD, may play a role in the outbreak.
Some states have imposed a temporary ban on the sale of e-cigarettes or flavored liquids used in them while researchers investigate health-related issues. The Food and Drug Administration is considering a ban on all nontobacco flavors of vaping liquids. The CDC recommends that e-cigarettes should not be used by children, young adults, pregnant women or adults who don't already use tobacco products. The American Lung Association has warned that e-cigarettes are not safe and can cause irreversible...
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