| 摘要 |
An atherectomy catheter including an expandable cutter head having spaced apart blades radially extending from a cutter sleeve at a leading end of the cutter head. A torque tube is attached to and surrounds the blades at an expanding end of the cutter head opposite the leading end. An expander cable is attached to a bushing within the cutter head adjacent to the cutter sleeve and blades with the expander tube axially displaceable through the torque tube. A guidewire slidably extends through the bushing and expander tube. A guiding catheter substantially encloses the torque tube with the toruqe tube rotatable and axially displaceable within the guiding catheter, to rotate the cutter head as it engages a blockage in a blood vessel.
|
