Fist-Sized Robot Could Crawl Inside Astronauts for Space Surgeries « Nerdist
Geege Schuman stashed this in Bots
In a process which would bear eery similarity to the bug scene of The Matrix, the robot would actually enter the abdomen via a small incision in the belly button. In order to give the bot enough room to work its medical magic, the abdomen of the patient would actually be pumped full of an inert gas, effectively inflating it to create space. Once inside, the robot could perform such operations as appendectomies or treatment for gastric ulcers.
I'm still struggling with fist sized. Smaller would be better. Nanorobots for surgery!