Sounds to me like you were absolutely right. As long as someone is holding stabilization of the child's head, go ahead and roll him and clear his airway. Why were rescue breaths even considered with an airway obstruction??!! Sounds like that EMT doesn't know his/ her ABC's. As far as who is ranked higher, we have different roles. Of course, nurses have more training and education, but EMT's have a different skill set that is specialized for emergency situations outside of the hospital setting. In the medical food chain in the hospital setting, it should go without saying that the hierarchy is DR-RN-EMT.