An exchange length guidewire for use in percutaneous transluminal coronary angioplasty is formed in two sections including a proximal section and a distal section. The proximal end of the distal section is rotatably attached to the distal end of the proximal section so that it may be rotated freely with...http://www.google.fr/patents/US5339833?utm_source=gb-gplus-shareBrevet US5339833 - Swivel exchange guidewire
