Multiple transducer assembly and method for coupling ultrasound energy

Abstract

A multiple transducer assembly and method for coupling ultrasonic energy to a body for thrombolysis of vascular thrombi is provided. The assembly includes a catalytic transducer apparatus including a plurality of transducers for transmitting ultrasound into a medical target transcutaneously. Each transducer includes a front mass having structure which optimizes the transmission of ultrasound into the body. The transducers may share a common front mass. A reservoir for containing a cooling conductive medium between the front mass and the body surface is provided, and is contained within the housing. In addition, the catalytic transducer includes an irrigation manifold, disposed through a center of the front mass, for directing the medium into the reservoir generally along a perimeter thereof. The front mass includes an apex for accumulating expelled gasses. A sloped surface of the front mass functions to direct expelled gasses toward the apex and through an outlet provided by the irrigation manifold. The medium may be circulated from a degassing tank as well as a heat exchange unit in order to maintain a desired reservoir temperature at the body surface. In the multiple transducer arrangement, the transducers may share a common cooling reservoir. A flexible blanket may be provided for collectively housing a desired number and arrangement of transducers.