The reason Johnny B. Goode (Stephen King) is not present in this episode is because of a burst water pipe in the new underground parking garage that is under construction.
Kingdom Hospital is a slightly altered world and from the mind of Stephen King, but it is supposed to be a real, functioning hospital. Given the potential litigation, no hospital would put a sick woman on a stretcher into an elevator on her own. An orderly would have to accompany her in case of a malfunction, or if she became sicker.
When the paramedic is examining Peter (Jack Coleman) on the side of the road, he states to the hospital on his radio the Peter's right eye is "fixed and dilated", however, on several close-up shots that follow, you can clearly see his pupil is not dilated.