She explains that traditionally, surgeons "finish training and then start operating on our own, and we don't have any mechanism for continuing to look at the way we perform procedures.
"For example, if you have two surgeons who have been in practice for 20 years, who sit down and watch a video of one of them doing the operation, and they talk through different approaches, they can identify things that might broaden their repertoire."
They might be able to position themselves better, use a different tool, or change a sequence of steps.
Some hospitals are already trying these techniques. Greenberg says efforts are underway at a Michigan bariatric quality collaborative, at the University of Virginia, Indiana University, and in the United Kingdom.
Greenberg's idea received support last week from Johns Hopkins surgeon and author Marty Makary, MD.
In a Viewpoint article April 1 in the Journal of the American Medical Association, Makary wrote that recordings can help address "the chronic problem of disruptive behavior," witnessed by 86% of nurses and 47% of physicians in a study of 50 hospitals. "A camera in a procedure room can increase accountability," he wrote, "in the same way that some hospitals currently use cameras to monitor cleaning staff."