Hospitals throughout Connecticut keep their competitive technological edge by offering the surgical services of a million-dollar, multi-armed robot named da Vinci. The robots were used in nearly 400,000 surgeries nationwide last year — triple the number of just four years earlier.

But in the past year or so, there's been a spate of lawsuits filed in federal courthouses across the country against the leading maker of surgical robots. Plaintiffs say they have been burned or suffered other severe injuries during surgery.