I don't know. Was all very strange. Nurse brought me back there, then the scheduler came out and said they couldn't and will call to set it up. Not sure if there was a problem with the machine or something else unknown. I am more upset that I got no direction whatsoever. Should I be doing something, or things to avoid....I don't want pain killers...I don't know. Hate to drive back up today, but without a phone call at an appropriate time, a face to face may be necessary.