This may be a strange scene: on a cold night in October 2006, a group of engineering students and their professor Sylvain Martel gathered in the classroom to watch an anesthetized pig on an MRI machine. Breathing, the last classroom sounded with warm applause...
A hospital technician implanted a steel ball with a ballpoint pen bead into the carotid artery of the pig through a catheter. After a few minutes, they saw the steel ball on the computer screen suddenly move. This is exactly what the team wants to see. This is the first time humans have implanted objects into biological blood vessels in a wirelessly controlled manner. This is a historic glimpse of the micro-robot research community, comparable to human beings on the moon for the first time.
Nowadays, various research institutions in the world are working hard to develop this small step. The engineering micro-robot will one day be able to implant the aorta and small blood vessels of the organism at the same time, and then bid farewell to the era of invasive surgery.
Robot doctor will arrive
Dr. Martel writes that the first feat of micro-robots in the medical field will be to treat cancer. Robots can directly import drugs into cancer cells, which only hit damaged cells and do not harm healthy cells.
However, although the future of development is bright, its challenges are enormous. It contains many physical problems, such as how to get a sized robot to pass through a viscous fluid filled with large arteries and small blood vessels; and biological problems, such as ensuring that the robotic material is non-toxic and biodegradable.
Eric Diller, a professor of mechanical engineering at the University of Toronto, said: “These robots need to be made very small, but they cannot simply scale down existing robots.†Researchers have sought inspiration from nature, using a bionic design similar to bacteria. Make micro robots.
He said that the living environment of micro-objects is very different from that of ordinary objects. If a micro-object swims in the water, the water will look very deep, so the moving objects should be made different. Later, I thought of bacteria, which made the micro-objects contain flagellates, which is very different from swimming with a fish in a container.
Earlier this year, Diller's team had a breakthrough: they made a one-millimeter robot. This robot has two arms and can be controlled by a magnetic field, so it can bridge the body. Diller said that micro-robots don't just make a difference in transporting drugs, they also repair our blood vessels and organs.
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