OAKLAND (AP) — A year ago, 13-year-old Jahi McMath underwent a tonsillectomy and tissue removal at Children’s Hospital in Oakland, California, to treat sleep apnea. The girl suffered massive bleeding, had a heart attack and was declared brain-dead Dec. 12.Her family battled to keep her on a ventilator and to have breathing and feeding tubes surgically inserted. Under a court agreement, the family and the hospital agreed that Jahi’s mother, Nailah Winkfield, could remove her from the hospital if she took responsibility for the girl’s care.A year later, Jahi remains on a ventilator and hooked to feeding tubes, and her case has ignited a debate over the definition of brain death.