You are transporting an elderly female who fell in a nursing home and displays outward rotation of her left leg. she has a lengthy medical history, including dementia. currently, she is very quiet and receiving oxygen through a nasal cannula at 6 liters per minute. she also is secured to a long spine board. during your reassessment, you note her to be alert but confused, with slightly accelerated respirations and a strong radial pulse. you also note that her spo2 has dropped from 97% on scene to 91%. you should: