A - Human Necessities – 61 – N
Patent
A - Human Necessities
61
N
A61N 1/30 (2006.01)
Patent
CA 2129242
Methods for conducting controlled environment electrotransport are described. The methods generally concern control of the ionic environment of the active electrode reservoir, in an electrotransport system. This control may be utilized, for example, to maintain a constant extraneous ion presence, such as pH. It may also be applied in a preferred manner to maintain selected con- trol over the delivery rate of a target species, in time, in the presence of extraneous ions. Apparatus usable to provide for con- trolled environment electrotransport are also described. In general the apparatus comprises an electrotransport system (5) includ- ing an active electrode reservoir (6) having therein both a primary electrode arrangement (30) and a secondary electrode arrange- ment (50), with a control arrangement (40) for selected operation of both. The secondary electrode arrangement (50), being operated different from the primary electrode arrangement (30), is selected for operation to selectively enhance or otherwise mod- ify ion presence in the active electrode reservoir (6), to achieve application of the general methods described. The apparatus may include a sensor means (60) therein, for use as feedback to a control system (40) during operation. Methods and systems involv- ing diffusion type delivery are also described.
Moodie Lyn Cammarano
Phipps Joseph Bradley
Alza Corporation
Robic
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