Patent ID: 8317713

Claim:
An ultrasound catheter assembly comprising: an elongate flexible shaft having first and second lumens, a proximal end, and a distal end; a collar coupled to the distal end; a transducer housing rotatably mounted to the collar such that the transducer housing is configured to pivot about an axis substantially transverse to a longitudinal axis of the lumen, a proximal portion of the transducer housing having a slot defined by a first wall portion and an opposing second wall portion; at least one transducer element mounted in the transducer housing; a drive member extending within the first lumen, the drive member comprising an elongated shaft having a bent distal portion defining a cam; said cam of the drive member engaged with the slot of the transducer housing such that rotation of the drive member causes the transducer housing to rotate along the axis that is substantially transverse to the longitudinal axis of the lumen through alternating interactions of the cam with the first and second wall portions defining the slot; and at least one tendon extending through said second lumen for articulating the flexible shaft in at least a first direction; the tendon being anchored to the distal end of the flexible member.