Wrong-site surgery is an easily preventable mistake that still happens year after year. In these cases, doctors typically do the proper procedure, but they simply do it on the wrong part of the body. This can be due to many factors, such as misleading notes, improper marking, switching patients at the last second, and much more.
Major mistakes made during surgery, often called never events, include operating on the wrong body part, operating on the wrong side of the body, doing the wrong procedure entirely, or operating on the wrong patient. These can all be very traumatic, life-changing events, so it's important to look at how often they happen.