A mechanical thrombectomy device, the device comprising: a catheter assembly comprising: a rotatable shaft having a proximal end and a distal end; and a basket assembly attached to the distal end of the rotatable shaft, the basket assembly comprising: a proximal hub and a distal hub disposed on a longitudinal axis of the basket assembly; a flexible inner tube having a first end attached to the proximal hub and a second end attached to the distal hub; and a plurality of basket wires, each of the plurality of basket wires having a first end attached to the proximal hub and a second end attached to the distal hub, the plurality of basket wires disposed around the flexible inner tube, the plurality of basket wires configured to expand to a preset shape; and a drive assembly configured to rotate the rotatable shaft, wherein the basket assembly is configured to rotate with the rotatable shaft to macerate a material proximate to the basket assembly, and wherein the flexible inner tube comprises a plurality of interlocking independent pieces separated by perforations such that the flexible inner tube and the basket assembly can expand axially and twist rotationally along the longitudinal axis. a catheter assembly comprising: a rotatable shaft having a proximal end and a distal end; and a basket assembly attached to the distal end of the rotatable shaft, the basket assembly comprising: a proximal hub and a distal hub disposed on a longitudinal axis of the basket assembly; a flexible inner tube having a first end attached to the proximal hub and a second end attached to the distal hub; and a plurality of basket wires, each of the plurality of basket wires having a first end attached to the proximal hub and a second end attached to the distal hub, the plurality of basket wires disposed around the flexible inner tube, the plurality of basket wires configured to expand to a preset shape; and a rotatable shaft having a proximal end and a distal end; and a basket assembly attached to the distal end of the rotatable shaft, the basket assembly comprising: a proximal hub and a distal hub disposed on a longitudinal axis of the basket assembly; a flexible inner tube having a first end attached to the proximal hub and a second end attached to the distal hub; and a plurality of basket wires, each of the plurality of basket wires having a first end attached to the proximal hub and a second end attached to the distal hub, the plurality of basket wires disposed around the flexible inner tube, the plurality of basket wires configured a proximal hub and a distal hub disposed on a longitudinal axis of the basket assembly; a flexible inner tube having a first end attached to the proximal hub and a second end attached to the distal hub; and a plurality of basket wires, each of the plurality of basket wires having a first end attached to the proximal hub and a second end attached to the distal hub, the plurality of basket wires disposed around the flexible inner tube, the plurality of basket wires configured to expand to a preset shape; and a drive assembly configured to rotate the rotatable shaft, wherein the basket assembly is configured to rotate with the rotatable shaft to macerate a material proximate to the basket assembly, and wherein the flexible inner tube comprises a plurality of interlocking independent pieces separated by perforations such that the flexible inner tube and the basket assembly can expand axially and twist rotationally along the longitudinal axis.