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Robotic arm reduces margin of error in knee-replacement surgery

A robotic arm has significantly reduced the margin of error in knee-replacement surgery, doctors at a city hospital said on Saturday.

In a traditional surgery, doctors remove the damaged surface of the knee joint and replace it with an implant made of metal and plastic. In a robotic knee replacement, surgeons build a virtual model of the patient’s knee. The model is fed into the robot, which is used by the surgeon to insert the implant with precision.

“In the standard knee-replacement surgery, the human eye of a surgeon can detect errors over three degrees. Deviations of three degrees and below go undetected. The robot has reduced that error margin to 0.5 degrees,” said Rakesh Rajput, director, department of orthopaedics, CMRI.

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