| 摘要 |
An electrically powered iontophoretic delivery device is provided. The devic e includes a pair of electrode assemblies (41, 43) and a source of electrical power (30) connected thereto. Circuit means (60) are provided including an activation circuit (62) and a power generating circuit (70). Before use, neither the power generatin g circuit (70) nor the activation circuit (62) draw current from the power source (30). When the device is placed on the body (5 0) and electrical contact is established between the two electrode assemblies (41, 43), the activation circuit (62) is closed causing the power generating circuit (70) to be activated, thereby activating the device. The circuit means (60) improves the shelf-life of the device by minimizing current drain from the battery (30) before use. |
