Neural stimulation system providing auto adjustment of stimulus output as a function of sensed impedance
US7317948B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 11, 2003 |
| Grant date | Jan 8, 2008 |
| Priority date | — |
| Expiry date | May 24, 2024 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N1/3615
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A neural stimulation system automatically corrects or adjusts the stimulus magnitude (stimulation energy) in order to maintain a comfortable and effective stimulation therapy. Because the changes in impedance associated with the electrode-tissue interface can indicate obstruction of current flow and positional lead displacement, lead impedance can indicate the quantity of electrical stimulation energy that should be delivered to the target neural tissue to provide corrective adjustment. Hence, a change in impedance or morphology of an impedance curve may be used in a feedback loop to indicate that the stimulation energy needs to be adjusted and the system can effectively auto correct the magnitude of stimulation energy to maintain a desired therapeutic effect.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.