Iontophoretic drug delivery device having high-efficiency DC-to-DC energy conversion circuit
US6522919B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 21, 2000 |
| Grant date | Feb 18, 2003 |
| Priority date | — |
| Expiry date | Nov 21, 2020 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N1/30
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An iontophoresis system includes a transdermal patch for placement against the skin of a patient and a controller electrically connected to the patch. The patch includes an anode and cathode electrode, and holds an electrolyte and a medication. The controller includes a DC-DC converter circuit which generates an output voltage that is provided to the anode electrode. The controller also includes an adjustable current regulator circuit. The current regulator circuit is coupled to the cathode electrode and is adjustable to provide a desired current flow through the electrodes and the skin of the patient. The DC-DC converter circuit is responsive to the voltage drop across the electrodes and adjusts its output voltage in response to this voltage drop and changes in the impedance of the patient's skin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.