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A less painful colonoscopy
Date:4/27/2011

MEDFORD/SOMERVILLE, Mass. Colonoscopy is regarded as the most thorough way to screen for colon cancer but the potentially life-saving procedure can also be painful. Scientists and engineers are continually researching new methods of screening to reduce patient discomfort while also ensuring the accuracy of the exam. Researchers at Tufts University's School of Engineering led by Associate Professor of Mechanical Engineering Caroline G.L. Cao, Ph.D., have developed a device that could potentially do both.

Tufts endoscopic fiber optic shape tracker (EFOST) technology is a possible solution to the problem that occurs when the endoscope is inserted into the colon during routine screening. As an endoscopist navigates the scope through the bends and turns in the colon, its tip can impinge against the colon wall.

When this happens, the tip becomes stationary and is unable to move forward. As the physician applies more pressure, a loop can form in the length of scope behind the tip. Because the traditional endoscope provides only a frontal view during the procedure, the doctor cannot see the loop, much less easily maneuver the scope to remove it. Not surprisingly, looping can be a major source of pain during a colonoscopy.

But by outfitting an endoscope with fiber optic bend sensors and digital electronics that display its position and shape on a video monitor, the Tufts engineers have built a system that could serve as a visual navigation tool, says Cao

"Doctors will have a way to see in real-time how the scope is moving inside the patient's body," says Cao. "If the scope begins to loop, they will see it instantaneously and then be able to make adjustments to straighten it out."

Bend Sensors to Create a Visual Image

Cao and Mechanical Engineering Research Associate Professor Peter Y. Wong, Ph.D, described their concept in a paper titled "Localized Active-Cladding Optical Fiber Bend Sensor" in June 2010 i
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Contact: Alex Reid
alexander.reid@tufts.edu
617-627-4173
Tufts University
Source:Eurekalert

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