The catheter device comprises a drive shaft connected to a motor, and a rotor mounted on the drive shaft at the distal end section. The rotor has a frame structure which is formed by a screw-like boundary frame and rotor struts extending radially inwards from the boundary frame. The rotor struts are...http://www.google.fr/patents/US20090093796?utm_source=gb-gplus-shareBrevet US20090093796 - CATHETER DEVICE
