If you don’t know what NPO means and you are interested in SWL, you are about to learn all about it. Nihil per os, nothing per oral, nil per os… It all basically means that you may put nothing down your throat no matter how hungry you get. This is for a variety of reasons. Sometimes it’s because what you eat or drink may alter the accuracy of the test required and sometimes it’s to prevent you from breathing food or vomit into your lungs, regardless it is medically necessary. Continue reading “So hungry. So many tests.”