MedGadget reports on a surgical instrument developed by engineers at Vanderbilt University that is introduced into the body via a single incision and is controlled by a series of magnets. I believe this represents one of the first proofs of where surgical devices are headed: tiny robotic instruments that perform surgical procedures after being injected into the body. Read more about medical nanobots and other technologies that will have a large impact on medicine and medical device design in this post: Medical Product Development and the Future.