differences between main OR and others?

its usually facility specific. where I am now, there is the "main OR" as well an ambulatory surgery center OR in the same building--outpatients are generally done there. The main handles pts who will likely stay at least overnight as well as the emergencies/traumas/add-ons/inpatients. In additon, we have several open heart ORs, they are located within the main, but have dedicated staff. The cardiac staff can help in the main when needed/available, but the rest of the staff cannot be floated to the cardiac rooms. There is also a minor procedure room where straight local cases can be done, often staffed by the pre-op/PACU staff as no scrub nurse is needed for these cases.