A system for guiding devices or materials into body lumens includes a guidewire made of a shape memory alloy (SMA) or other shape memory material and having a lumen; an energy guide, preferably an optical fiber, received in the lumen; and a catheter or device slidably attached to the guidewire. The guidewire...http://www.google.com.au/patents/US5904657?utm_source=gb-gplus-sharePatent US5904657 - System for guiding devices in body lumens
