System and methods for wireless body fluid monitoring
US8374688B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 12, 2008 |
| Grant date | Feb 12, 2013 |
| Priority date | — |
| Expiry date | Mar 24, 2030 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2562/043
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An adherent device to monitor a tissue hydration of a patient comprises an adhesive patch to adhere to a skin of the patient. At least four electrodes are connected to the patch and capable of electrically coupling to the patient. Impedance circuitry is coupled to the at least four electrodes to measure a tissue resistance of the patient, where the circuitry is configured to determine the tissue hydration in response to tissue resistance. The circuitry may comprise a processor system and the tissue resistance may correspond to a change in patient body fluid. The impedance circuitry is configured to measure the hydration signal using at least one low measurement frequency, which may be in the range of 0 to 10 kHz. Multiple measurement frequencies may be used and the hydration signal may include a tissue reactance measurement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.