Future of med devices: Nanorobots in your blood stream

The ultimate in delivery systems, we could have them deliver stem cells to the proper location, or send signals for neuroplasticity to take place.
http://medcitynews.com/2012/05/embedded-chips-gps-pacemakers-ai-oh-my-whats-in-your-health-future/
Targeted medicine using nanorobots
Nanorobots are essentially injectable machines the size of a red blood cell than can be controlled from outside the body.
These minute devices can be controlled so that they can be steered to the area of interest — a diseased part of the body. These devices can recognize a tumor, an aneurysm or any other malady, and inject medicine to kill the diseased cell.
“This is targeted medicine at its best,” said Dr. Michael Smith, staff doctor, clinician and community liaison withLife Extension.
Smith added that these devices fitted with a camera can be driven to the area requiring medication, or can be programed based on the person’s body shape to self propel to the diseased area.
He imagines that nanorobots would become most ubiquitous in the treatment of cancer.