| 摘要 |
<p>A rotational atherectomy device comprises a rotatable, flexible, hollow driv e shaft (2) having an open distal end. The drive shaft comprising a fluid impermeable wall (3), an abrasive element (1002) mounted to the drive shaft proximal to and spaced away from its distal end, the fluid impermeable wall being formed from a torque transmitting coil (4) and at least one fluid impermeable membrane which define a lumen for the antegrade flow of pressurized fluid through the drive shaft and into a distal fluid inflatable support element (10) to inflate said fluid inflatable support element. The distal fluid inflatable support element is located at the distal end of the drive shaft and has an outer wall comprising an outflow opening located such that said outflow opening (20) faces an inner surface of a treated vessel during rotation of the drive shaft so that a layer of fluid forms a fluid bearing.</p> |
