The invention includes a catheter having an elongate main body portion and a distal body portion. The elongate main body portion has a proximal end and a distal end. The main body portion further includes a coil having at least one complete turn about a central axis, the coil defining a passage along...http://www.google.es/patents/US7527606?utm_source=gb-gplus-sharePatente US7527606 - Catheter having main body portion with coil-defined guidewire passage
Catheter having main body portion with coil-defined guidewire passage