In the previous episode, Arizona delivers a baby in the elevator and pronounces him to be a boy. Near the beginning of this episode, Arizona takes the baby from the mother, saying "Let me take her."
When the extricated man is rolled into the operating room, Kepner is sitting on his abdomen giving CPR because he coded in the elevator. However, in the previous scenes and the following scenes his abdomen is entirely full of clamps which would have prevented her from doing this safely.