Four of the patients experienced "blast injuries," the authors wrote. These injuries caused tooth loss and "extensive" soft-tissue loss in the patients, and some patients needed surgery to remove damaged tissue and close up their wounds, according to the report.
Some of the patients with blast injuries also had "traumatic tattooing," which occurs when foreign particles get embedded below the surface of a person's skin, creating a tattooed appearance.
The authors noted that more than half of the injuries were to the thigh or groin, one-third of the injuries were to the hands and one-fifth of the injuries were to the face.
RELATED: E-Cig Benefits Outweigh Risks: Study
Patients injured by e-cigarettes often require medical treatments from a number of different specialists, including emergency medicine providers, plastic surgeons, burn care providers, vocational counselors and psychologists, according to the report.
In all of the cases that the authors described, the device's lithium-ion battery caused the explosion.
The authors noted that the Food and Drug Administration recently announced that it would begin to regulate all tobacco products, including e-cigarettes, but that it's unclear if the agency would also regulate the batteries.
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