I work per diem at two ambulatory endoscopy centers. Both require patients to be able to walk in and out of the facility on their own. Occassionally we will have a patient that requires a wheelchair ride to the car but minimal lifting in terms of pre-op and post-op care. In our procedure rooms you may have to help roll or reposition a patient - keep in mind that these patients are sedated and are not able to assist too much with moving. Also - depending on how your doctor's scope - the stretcher will most likely be elevated to their standing position so it can be hard to get the right body mechanics to move a patient without straining yourself too much, especially if you are short like me
We do have the MD, 1 RN and 1 tech in the room so rarely will you have to reposition someone without help. You may also be required to push the stretcher from the pre area to the procedure room and then to the post area.
I also work 7am-7pm on a busy telemetry/PCU. I've found sometimes that my back hurts more when I work per diem in the Endo center. Probably because we are standing 90% of the time and when in the procedure room not really moving around too much as you are monitoring the patient.