| 摘要 |
MATERIAL REMOVAL DEVICE AND METHOD OF USE Abstract A catheter (2A) for removing material from a body lumen (13) comprising: a tubular body (8) having proximal and distal ends and a side opening (6) positioned proximal of the distal end of the tubular body (8); a rotatable shaft (20) disposed within the lumen (13) of the tubular body (8), the rotatable shaft (20) having proximal and distal ends; a cutting element (4) coupled to the rotatable shaft (20) the cutting element (4) having a cutting edge (20); a cam follower (26) secured to the rotatable shaft (20) adjacent the proximal end of the rotatable shaft (20); and a handle (5A) attached to the tubular body (8) adjacent the proximal end of the tubular body (8), the handle (5A) including a motor (11), and a cylindrical cam (27) coupled to the motor (11) and to the cam follower (26), wherein the cutting element (4) and the rotatable shaft (20) are longitudinally moveable within the tubular body (8) between a stored position, in which the cutting element (4) is received in the tubular body (8), and a cutting position, in which at least a portion of the cutting edge (22) extends through the side opening (6), wherein the motor (11) is configured to transmit rotation to the cylindrical cam (27) to both impart translation to the cam follower (26) to move the cutting element (4) from the stored position to the cutting position and impart rotation to the cam follower (27) when the cutting element (4) is in the cutting position to rotate the cutting element (4) about its axis of rotation. |
