“Looking at more than 10,000 incident reports from the FDA spanning from 2000 to 2013, researchers found that robots were involved in 144 patient deaths and 1,391 patient injuries… Some of the errors included burnt or broken pieces of tools falling into the patient (14.7 percent), electrical sparking (10.5 percent) and robots making unintended movements (8.6 percent) -- the last of which resulted in 52 injuries and two deaths.”
Source: NBC News