Researchers at Stanford University have developed a new way to safely transfer energy to tiny medical devices implanted deep inside the human body
Using this new technology, medical implants could run on significantly smaller batteries, shrinking down to the size of a grain of rice, and be implanted much deeper within the body.
The power source is a small device the size of a credit card. When the electromagnetic waves that it generates move from air to the patient's skin, they refract in such a way that they are able to propagate safely and effectively through human tissue, in what the researchers call a "mid-field wireless transfer."
The advance could lead to the development of tiny "electroceutical" devices that can be implanted near nerve bundles, heart or brain tissue and stimulate them directly when needed, treating diseases using electronics rather than drugs.
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