the proximal end of elongate member 314 may be free or may be attached to a motion control apparatus able to impart motion along the axis of elongate member 314 the motion control apparatus may impart longitudinal or radial motion or vibration to the distal end of elongate member 314 catheter 302 may also be fluidly attached to a vacuum source the motion control apparatus may impart a motion to distal device 304 at between 1 hz and 150 hz of course motion at higher or lower frequencies than this are envisioned as an example it may be advantageous to move distal device 304 at selective intervals lower than 1 hz only when a lumen is clogged in addition it may be preferable to impart a motion at up to 20 khz the motion control apparatus may have any advantageous range of motion one example range of motion is 17 mm this may be done by configuring the motion control apparatus to move distal device 2 mm proximally and 15 mm distal from a starting position another example range of motion is 120 mm with the motion control apparatus configured to move distal device 304 20 mm proximally and 100 mm distally fig1 b depicts an embolectomy device 400 device 400 is similar to device 300 and includes a catheter 402 having an angled.