Needle-sized mechanical wrist gives surgery a new angle

Some of the most difficult types of surgery just got easier and more versatile. A team of engineers and doctors at Vanderbilt University has developed a tiny mechanical wrist that can be used for millimeter-sized incisions and sutures that allow new kinds of operations and less-invasive ways of conducting existing procedures. The wrist is flexible enough that its end can be steered to allow needles to reach inside the nose, throat, ears, urethra, and brain.

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