Hollow-waveguide-based laser-to-ultrasound transducer for drug delivery application

摘要

A COP (cyclic olefin polymer)-coated silver hollow waveguide was used to transmit 1064-nm nanosecond laser pulses that irradiated a metal target to produce an ultrasound wave (stress wave) through a plasma formation on the target. Porcine gastric and myocardium tissues, on which a solution of rhodamine-B isothiocyanate-dextran (10 kDa) was dropped, were exposed to the stress wave. Much deeper drug penetration was observed for the tissues exposed the stress wave than for the tissues without stress wave exposure.