interface is configured in a manner so as to reflect most of the energy back into the horn the horn therefore essentially acts as an energy storage device or u201c reservoir u201d thereby allowing a substantial increase in drive amplitude since the energy coupled into the elongated probe is a small portion of the energy reflected back to the horn changes in the transverse oscillation on the probe due to bending or damping have minimal effect on the longitudinal resonance of the horn by decoupling the transverse probe oscillation from the longitudinal horn resonance the electrical source of the vibrations piezoelectric or magnetostrictive to compensate only for shifts in the resonant frequency of the horn due to temperature manufacturing variations etc the drive mechanism is therefore completely independent of vibrational motions on the probe the transverse vibrating elongated probe of the invention does not require its terminal end be permanently affixed in intimate contact to the horn assembly since a u201c hammering u201d action associated with longitudinal vibration is absent the elongated probe of the invention can therefore be coupled and not welded to the horn via a coupling assembly that grips the probe along the cylindrical surface near its terminal end in a non permanent way the coupling assembly of the invention therefore allows for quick attachment and detachment of the probe from the horn assembly and source components thereby enabling manipulation of the elongated flexible probe into anatomically curved blood vessels without hindrance by the bulky horn and energy source components the probe of the invention can therefore be inserted into a venal cavity positioned near the occlusion site prior to coupling it to the horn source assembly the device is.