A capsule designed to crawl though a patient's stomach, enabling doctors to view and even treat an internal ailment remotely, has been developed by an international research team.
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Current endoscopies require a patient to swallow a capsule equipped with a camera that transmits images back outside the body. This enables a doctor to remotely examine the tract for potential problems. The capsule is passed through the patient's gastrointestinal tract by the motion of their digestive system.
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The researchers have begun testing prototype legs walking through animal stomach tissue and have also developed a system for controlling the leg movement. Each leg is made from a shape memory alloy, which “remembers” its original shape and reverts back to it - much like a spring - each time a step is taken.