I'm a radiologic technologist and often have to interact with my spanish patients without an interpreter. I'm just starting to learn useful phrases and such (eg, are you pregnant, where does it hurt, when did this happen...) but I'm having trouble finding a quality source of medically useful phrases. Any online sources would be of a great help!

Tomorrow I have a Spanish exchange arriving.I haven't studied Spanish in over a year and have all but forgotten it. It's in a school environment, and I wondered if any one had any useful phrases.