Devices and methods for sensing physiological signals during stimulation therapy
US11103172B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 28, 2013 |
| Grant date | Aug 31, 2021 |
| Priority date | — |
| Expiry date | Feb 9, 2038 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N1/36125
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Devices and methods provide for the sensing of physiological signals during stimulation therapy by preventing stimulation waveform artifacts from being passed through to the amplification of the sensed physiological signal. Thus, the amplifiers are not adversely affected by the stimulation waveform and can provide for successful sensing of physiological signals between stimulation waveform pulses. A blanking switch may be used to blank the stimulation waveform artifacts where the blanking switch is operated in a manner synchronized with the stimulation waveform so that conduction in the sensing path is blocked during the stimulation pulse as well as during other troublesome artifacts such as a peak of a recharge pulse. A limiter may be used to limit the amplitude of the sensed signal, and hence the stimulation artifacts, that are passed to the amplifier without any synchronization of the limiter to the stimulation waveform.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.