Surgeons can control its movements using a joystick. The caterpillar-like device "walks" by attaching a suction foot to the surface and then extending its body, attaching a second suction foot and pulling the back foot forward. The device, called HeartLander, is designed to attach to the surface of the heart and to move around to positions where treatment is needed. Scientists working on the prototype hope it could one day help doctors to repair damaged hearts under local anaesthetic without needing to open up a patient's chest cavity. At two centimetres long and moving like a caterpillar, it is seen as a miniature robot surgeon, capable of entering a patient's chest to perform precision heart operations without invasive surgery.
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