Patent ID: 8628550

Claim:
A high-speed rotational atherectomy device for opening a stenosis in an artery having a given diameter, comprising: a guide wire having a maximum diameter less than the diameter of the artery; a flexible elongated, rotatable drive shaft advanceable over the guide wire, the drive shaft having a rotational axis; an eccentric proximal segment defining a drive shaft lumen therethrough, wherein the proximal segment is mounted on the drive shaft; at least one eccentric cylindrical segment separate from the eccentric proximal segment, the at least one eccentric cylindrical segment defining a drive shaft lumen therethrough, wherein the at least one eccentric cylindrical segment is mounted distally and separately from the proximal segment on the drive shaft, wherein the at least one eccentric cylindrical segment and the proximal segment are spaced apart along the drive shaft by a first flexibility gap; an eccentric distal segment separate from the at least one eccentric cylindrical segment, the distal segment defining a drive shaft lumen therethrough, wherein the distal segment is mounted distally and separately from the at least one eccentric cylindrical segment on the drive shaft, wherein the at least one eccentric cylindrical segment and the distal segment are spaced apart along the drive shaft by a second flexibility gap.