At some people, it manifests with blue or purple lips, skin, or nails, while at others, it is asymptomatic.

According to People, Silvanna had a fever and was given children’s Tylenol a day before the three-hour-long procedure.

The dentist’s office that treated the girl said she was a new patient referred to them for a root canal on a molar.

During the dental procedure in which the 9-year-old died, some baby teeth, as well as one permanent decayed tooth, were extracted.

According to NBC News, Dr. Ryan Watkins, the office’s trained anesthesiologist, said in a statement that “Silvanna was a healthy 9-year-old with a history of regular medical checkups.” He added that she underwent the office’s standard preoperative evaluation and was “an appropriate candidate for outpatient general anesthesia”

The Medical Examiner’s summary report stated that the girl was moved to a “recovery room” following