A medical guidewire includes a distal end for entering and navigating in a lumen. The distal end comprises a core having a length for navigating the guidewire in the lumen. A formable distal tip is included at the distal end of the core, and a sleeve element substantially surrounds the core over less...http://www.google.de/patents/US5372144?utm_source=gb-gplus-sharePatent US5372144 - Navigability improved guidewire construction and method of using same
