A medical guidewire assembly comprises a guidewire having a flexible tip. A medical device such as a collapsible filter for use as an embolic protection device is mounted on the guidewire. The filter is advanced through a body lumen with the guidewire tip extending distally. At a first location the filter...http://www.google.com/patents/US7491216?utm_source=gb-gplus-sharePatent US7491216 - Filter element with retractable guidewire tip
