Patients are asked to arrive between 7 and 11 PM on the evening prior to their procedure for an overnight admission to 5 East ward, on the 5th floor of the Harbor UCLA Medical Center in Torrance, California, United States. Once there, vital signs (blood pressure, pulse, oxygen saturation -- amount of oxygen in the blood, and breathing rate) is checked and an intravenous line is placed. Before, during and after the procedure, patients are asked to rate their pain on a scale of 0 to 10 with 0 being "no pain" and 10 being "the worst pain possible."