The invention discloses a
drug delivery microneedle
system driven by a miniature ultrasonic patch. The
drug delivery microneedle
system comprises an excitation circuit, the miniature piezoelectric ultrasonic patch, a
drug carrying microneedle array, a
coupling structure and a packaging structure. The
system has a modulatable
sound field characteristic, the excitation circuit drives the piezoelectric ultrasonic patch to generate
ultrasonic vibration by applying an
electric signal with specific frequency and amplitude, and release of a
Janus kinase (JAK) inhibitor loaded by the microneedle array is promoted. The miniature ultrasonic patch adopts a sheet-shaped design, the size is 5-50mm, the thickness is 0.5-5mm, the working frequency is 0.1-4MHz, and the driving
voltage is 40-100V. The main body material of the drug-loaded microneedle array is hydrogel capable of loading a JAK inhibitor, the microneedle substrate and the ultrasonic patch are tightly fixed through a
coupling structure, and the ultrasonic patch is coated with a packaging structure. The
controllability of the
drug delivery microneedle is optimized by introducing the modulatable
sound field, accurate regulation and control and synergism of
drug release can be achieved, and the
drug delivery microneedle has important application prospects in
targeted therapy of immune
skin diseases.