What are the test results accomplished by three NASA astronauts and one surgeon who were undergoing long-term training in an underwater habitat called the NASA Extreme Environment Mission Operations? Have the telementoring results demonstrated that nonsurgeons having been trained with a specified skill set can perform more complex laparoscopic procedure using in vivo robots? Will miniature surgical robots be used in place of standard laparoscopic surgical equipment without loss of performance?
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The name ‘snake-arm robot’ gives a good description of how these robots look and move. They are slender, flexible manipulators which can follow a path into a confined space. A snake-arm robot is an extremely versatile robotic arm that can carry cameras and tools into environments which cannot otherwise be accessed. The structure of a snake-arm robot is similar to a human spine in that it is comprised of a number of vertebrae. It is atendon-driven arm with wires terminating at various points along the length of thearm – three at the end of every ‘segmenThe result is that the curvature and plaof curvature of each segment can be independently controlled (see diagram on the right…
A motor is used to control the length of each wire independently. The control software calculates the necessary lengths of all the wires to produce the desired shape. While the operator uses a joystick to drive the tip, the computer does the maths to make the arm follow. This tip-following capability enables a snake-arm robot to avoid obstacles and “follow its nose” into complex structures. The operator can also control the arm in tool or world space, whilst continuing to avoid obstacles…
The technology is very scalable and OC Robotics has designed arms to be large and durable as well as small and compliant. Snake-arm robots can combine a significant payload with precise positioning and still snake into confined spaces.