I'm a nurse anesthetist in Saint Paul, MN, and discovered this group that sings "Anesthesia Music". They're called the Laryngospasms and they take old songs and change the words to create parodies of anesthesia and the OR. They have online samples of their music available - check 'em out - www.laryngospasms.com.
I cracked up when I heard "Breathe" - they actually sound good, too!!