A number of potential causes for the lung injuries have been suggested. Based on reviews of lung tissue biopsies the new research claims there is no evidence of oil accumulation but instead identifies direct tissue damage most likely caused by toxic chemical fumes.
"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", said Brandon Larsen, one of the study's authors and a surgical pathologist at the Mayo Clinic in Scottsdale, Arizona in a release.
Larsen and his team published their findings October 2 in The New England Journal of Medicine. Two of the biopsies came from patients who died.
The researchers looked at samples of lung tissue from 17 people, all of whom had vaped and 70% had used marijuana or cannabis oils. "Much recent attention has been given to the possibility that vaping-associated lung injury may represent exogenous lipoid pneumonia", the researchers report.
Dr Branden Larsen, senior creator, acknowledged: "Whereas we can now no longer decrease label the aptitude characteristic of lipids, we be pleased now no longer viewed anything to counsel right here is an bid attributable to lipid accumulation within the lungs". "We have seen a handful of cases, scattered individual cases, over the past two years where we've observed the same thing, and now we are seeing a sudden spike in cases".
He said that unless clinicians and pathologists have the information in advance, diagnosing vaping-associated injury can be hard.
At least 17 people nationwide have died from vaping-related illnesses.
"Everyone need to understand that vaping is not with out potential hazards, including existence-threatening challenges, and I consider our investigate supports that", Larsen stated, calling for fast regulation of the sector.
In the meantime, the public should heed what leading medical organizations and public health agencies are saying about the dangers of vaping.
In response to the Facilities for Illness Management, lots of the sufferers who've developed vape related sickness have additionally used e-cigarette merchandise containing THC, the principle psychoactive ingredient in Marijuana.
In April, Martin McKee, professor of European public health at the London School of Hygiene and Tropical Medicine, said the United Kingdom was "out of step" with other parts of the world when it came to messages around the safety of vaping.
It's still unclear at this time which chemicals are responsible for the injury, though state and federal officials are actively looking for the cause.
For months, USA health officials have scrambled to determine why more than 800 people have developed lung illnesses and at least 12 people have died due to problems connected to vaping, but reached frustratingly few conclusions.
Although most of the patients who vaped cannabis extracts used black-market products, two people in OR who died after vaping THC reported that they bought cartridges from state-licensed shops.