3D-Printed Integrated Ultrasonic Microneedle Array for Rapid Transdermal Drug Delivery.

Area of Science:

• Biomedical Engineering
• Drug Delivery Systems
• Materials Science

Background:

• Transdermal drug delivery (TDD) offers an alternative to oral and injectable routes.
• Microneedles (MNs) facilitate skin penetration but lack a driving force for deep tissue transport.
• Existing MN technologies struggle with efficient delivery of hydrophilic and macromolecular drugs.

Purpose of the Study:

• To develop an integrated device for enhanced and controllable transdermal drug delivery.
• To overcome the limitations of conventional microneedles in drug transport.
• To investigate the efficacy and safety of a novel ultrasonic microneedle array (USMA).

Main Methods:

• Design and fabrication of a 3D-printed hollow microneedle array integrated with an ultrasonic transducer.
• Utilizing ultrasound transmitted through microneedles to provide a driving force for drug transport.
• In vitro testing on porcine skin using methylene blue and bovine serum albumin as model drugs.

Main Results:

• The USMA significantly enhanced the delivery efficiency of model drugs compared to conventional methods.
• Ultrasound application reduced the insertion force required for microneedles.
• USMA demonstrated reduced tissue damage, indicating a gentler and well-tolerated delivery method.

Conclusions:

• The integrated ultrasonic microneedle array (USMA) shows significant potential for efficient transdermal drug delivery.
• This technology offers a promising approach for clinical applications, improving patient outcomes.
• USMA technology could lead to more effective and less invasive drug administration methods.