NC surgeons use tools washed in hydraulic fluid

According to a recent news story:

...sometime last year, elevator workers at two hospitals drained hydraulic fluid into empty soap containers and capped them without changing the labels.  Not long afterward, medical staff complained that some of their surgical tools felt slick. But it was not until January that nearly 4,000 patients learned their surgeons had unknowingly used instruments washed in the slippery fluid instead of soap...