It was a typical mother-daughter disagreement -- until things went dreadfully wrong. Medrith Filley and her 15-year-old daughter, Heather, were having a heated discussion as they pulled up to their home in Mission Viejo, Calif., one Saturday morning in November 1997. Heather suddenly decided to jump out of the car, and the heel of her shoe caught on the doorjamb, flipping her backward, her head hitting the pavement hard.
Filley, a nurse, knew immediately that her daughter's injuries were grave -- her teeth were clenched, a symptom of profound brain injury, and she wasn't breathing. Heather lapsed into a deep coma after she was rushed to a local hospital. When surgeons operated on her, they discovered blood clots everywhere, and just about every part of her brain had sustained serious damage.
But instead of pumping her up with steroids and diuretics to dehydrate her and thus reduce swelling in the brain, which was the traditional method for treating head injuries, Heather's doctors followed a new protocol. She was tethered to monitors that measured blood pressure in her brain and blood-oxygen saturation, while catheters siphoned off excess fluids. Surgeons removed a large part of her skull to ease the pressure from the brain's swelling. All of this was designed to keep her blood pressure high enough to maintain a normal blood flow and to ensure her brain got the oxygen and fuel it needed to heal.
