An endoluminal device for deployment in a body lumen includes a radially expandable stent, a graft attached to the stent, and a plurality of indicator members affixed to the graft and adapted to form a normal pattern in response to a normal pressure differential and an abnormal pattern in response to...http://www.google.com.au/patents/US7955378?utm_source=gb-gplus-sharePatent US7955378 - Endoluminal device and system and method for detecting a change in pressure differential across an endoluminal device
