Retained

Fortunately, a retained surgical instrument or sponge is a rare occurrence. But it happens. It might be easy to ask how something like this could possibly happen, but after seeing some high tension, rapid pace emergency surgeries, I realize how difficult it is to keep track of all the sponges and surgical tools on the field. There's no tolerance for such egregious mistakes, but the scrub nurses have their hands full preventing something like this.

Image shown under fair use, from cbs2chicago.com, original source AP.