NEEDLE-FREE TRANSDERMAL TRANSPORT DEVICE

摘要

A needle-free transdermal transport device (100) for transferring a substance
across a surface (155) of a biological body (150) includes a reservoir (113)
for storing the substance, a nozzle (114) in fluid communication with the
reservoir and a controllable electromagnetic actuator (125) in communication
with the reservoir. The actuator, referred to as a Lorentz force actuator,
includes a stationary magnet assembly (105) and a moving coil assembly (104) .
The coil assembly moves a piston (126) having an end portion positioned within
the reservoir. The actuator receives an electrical input and generates in
response a corresponding force acting on the piston and causing a needle-free
transfer of the substance between the reservoir and the biological body. The
magnitude, direction and duration of the force are dynamically controlled
(e.g., servo-controlled) by the electrical input and can be altered during the
course of an actuation cycle. Beneficially, the actuator can be moved in
different directions according to the electrical input.