Tool-wielding snake robots 'to crawl in bodies and assist docs in surgery'

Washington, Wed, 30 May 2012 ANI

Washington, May 30 (ANI): Scientists and doctors, including one of Indian origin, are now using tiny snake robots to perform surgery on hearts, prostate cancer, and other diseased organs.

The snakebots carry tiny cameras, scissors and forceps, and even more advanced sensors are in the works. For now, they're powered by tethers that humans control. But experts say the day is coming when some robots will roam the body on their own.

"It won't be very long before we have robots that are nanobots, meaning they will actually be inside the body without tethers," Fox News quoted Michael Argenziano, the Chief of Adult Cardiac Surgery at New York-Presbyterian Hospital and Columbia University Medical Center in New York, as saying.

Argenziano was involved with some of the first U.S. Food and Drug Administration clinical trials on robotic heart surgery more than 10 years ago. Now he says snake robots have become a commonly used tool that gives surgeons a whole new perspective.

"It's like the ability to have little hands inside the patients, as if the surgeon had been shrunken, and was working on the heart valve," he said.

But Argenziano and experts in robotics say the new creations work best when they're designed for very specific tasks.

"The robot is a tool. It is no different in that sense than a scalpel. It's really a master-slave device," he said.

Howie Choset has been researching and building robots, particularly snake robots, at Pittsburgh's Carnegie Mellon University for years.

Choset believes that his snake robot and others like it help reduce medical costs by making complex surgeries faster and easier. Choset says his new design is smaller and more flexible than earlier models: The diameter of the head is less than the size of a dime.

The size of surgical robots allows surgeons to operate with far less damage to the body, helping the patient heal faster like, instead of opening the entire chest up during heart surgery, a small incision is made, and the robot crawls inside to the proper spot.

Dr. Ashutosh Tewari of Cornell University Medical Center has used robotic tools to perform thousands of prostate operations. He said the precision of the tiny robotic tool is vital not just to cutting out cancerous tumours, but to seeing exactly what nerves to leave intact.

Tewari said he's most excited about the potential for surgical robots to do things humans can't do. He said the variety of sensors available for surgical robots keeps expanding, even as they get smaller.

He said they may one day be able to test chemicals or blood in the body, or even the electrical connections in nerves.

Argenziano noted that robots aren't a magic cure.

"The robot is good at certain things and it's not good at other things," he said.

Some studies have found that the cost effectiveness of surgical robots varies greatly. In smaller hospitals, the high cost of purchasing and maintaining a robot may not make sense.

Choset has also built larger snake robots designed for search and rescue or just exploration. They can climb poles or trees and then look around through a camera in the head, and slither through places humans can't reach. (ANI)



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