We all get by better with a little help from our tunes. iStockphoto hide caption

toggle caption iStockphoto

A nurse anesthetist practices using the Universal Anesthesia Machine on an uncomplaining patient. John Sampson/JHMI hide caption

toggle caption John Sampson/JHMI

No anesthesia here: A patient watches his colonoscopy as it happens at Memorial Sloan-Kettering Hospital in New York. Ted Thai/Time & Life Pictures/Getty Image hide caption

toggle caption Ted Thai/Time & Life Pictures/Getty Image

NPR thanks our sponsors

Become an NPR sponsor