… stroke. Vivistim is manufactured by MicroTransponder®, a global medical device company. How it Works While VNS has been an extensively researched treatment … for a decade, had a long-standing scientific consultation relationship with the company developing the technology, brought the trial to MGH, was the principal … stroke. Vivistim is manufactured by MicroTransponder®, a global medical device company. How it Works While VNS has been an extensively researched treatment …