Patent ID: 8764700

Claim:
An apparatus for delivering ultrasound energy and a drug solution to a treatment site within a patient's vasculature, the apparatus comprising: an elongate, hollow sheath having a distal opening and an energy delivery section, wherein the sheath within the energy delivery section is at least partially constructed from a material that transmits ultrasound energy; a drug delivery lumen positioned along at least a portion of the sheath, the drug delivery lumen having a series of drug delivery ports within the energy delivery section, the series of drug delivery ports configured to deliver drug solution to the treatment site; an elongate body comprising an ultrasound element, the elongate body is movably positioned within the sheath, such that ultrasonic energy can be transmitted from the ultrasound element through the energy delivery section of the sheath; and a cooling fluid lumen formed between the elongate body and the sheath by positioning the elongate body within the sheath.