Vasostimulator
A vasostimulator was a type of 22nd century Vulcan medical device used in stimulating blood vessels. 

Kov's father was able to recover from a near-fatal illness after surgeons implanted a vasostimulator in his body. Kov later learned that according to the doctors, "with any luck, it'll extend his life a few years." ()

de:Vaso-Stimulator
Medical equipment