US Patent 7351246 Minimally invasive, sustained, intra-tympanic drug delivery system

A convenient and preferably wearable system and method for implementing the controlled and sustained delivery of a medical liquid through the tympanic membrane and into the middle ear including port structure that produces a minimal opening in the membrane, a wearable and fixated fluid-conduit structure coupleable to the port structure, a reservoir adapted to contain delivery fluid, and an operationally controllable pump system applied to the fluid conduit structure, and/or an iontophoretic electrode system applied within the fluid conduit structure and to the subject's body, and operable to effect the delivery of reservoir-held fluid or medically active ions through the fluid conduit and port structures to the middle ear.