A new prototype surgical robot developed in Britain bores into the brain like a wood wasp. Female wood wasps of the Siricidae family use an ovipositor, a needle-like shaft, to bore into pine trees and deposit their eggs. Two dovetailed shafts feature backward facing teeth. With each oscillation, the ovipositor moves a bit forward.
Ferdinando Rodriguez y Baena at Imperial College London noticed that this boring movement is remarkably gentle in its application. He remarks "It can insinuate itself into the tissue with the minimum amount of force."
His team has created a prototype medical probe; the silicon needle consists of two shafts with teeth just 50 microns long. Tiny motors oscillate the shafts to propel the device forward just like the wood wasp.
Researchers hope that it can reduce the number of incisions needed to reach different parts of a brain tumor; it can crawl across the surface of the brain and then burrow in.
This medical team is not the first group to notice the digging capabilities of the wood wasp. In a 1996 paper, a drill with similar inspiration was suggested for interplanetary exploration probes by Yang Gao, Ellery, Jaddou, and Vincent.
This device reminded me of the robotic mining worms from Emmett McDowell's 1946 science fiction story Love Among the Robots and the spaghetti-like robot earthworms from Harry Harrison's classic 1962 story War With The Robots.
Sources: see New Scientist and Biomimetics and robotics for space applications: challenges and emerging technologies (pdf).
(This Science Fiction in the News story used with permission of Technovelgy.com)