Implantable cranial nerve stimulator approved for depression treatment

Cyberonics produces a vagal nerve stimulator to help patients control epileptic seizures. Now, it looks like stimulating the vagus nerve might also help treat chronic depression. Interestingly, the economics are in favor of the device: According to a NYT article: The cost of the Cyberonics device and implanting it is about $20,000. Cyberonics said insurers had calculated that severe depressions that cannot be treated cost an average of $42,000 a year per patient, mostly from the injuries suffered in attempted suicides and accidents related to the illness.