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Methods for detection of bioimpedance variations in resource constrained environments

Priidel, E.; Annus, P.; Krivošei, A.; Rist, M.; Land, R.; Min, M.; Märtens, O. (2020). Methods for detection of bioimpedance variations in resource constrained environments. Sensors (Switzerland), 20 (5).10.3390/s20051363.
ajakirjaartikkel
Priidel, E.; Annus, P.; Krivošei, A.; Rist, M.; Land, R.; Min, M.; Märtens, O.
  • Inglise
Sensors (Switzerland)
1424-8220
20
5
2020
Ilmunud
1.1. Teadusartiklid, mis on kajastatud Web of Science andmebaasides Science Citation Index Expanded, Social Sciences Citation Index, Arts & Humanities Citation Index ja/või andmebaasis Scopus (v.a. kogumikud)
SCOPUS

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dx.doi.org/10.3390/s20051363

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© 2020 by the authors. Licensee MDPI, Basel, Switzerland. Changes in a certain parameter are often a few magnitudes smaller than the base value of the parameter, specifying significant requirements for the dynamic range and noise levels of the measurement system. In case of electrical bioimpedance acquisition, the variations can be 1000 times smaller than the entire measured value. Synchronous or lock-in measurement of these variations is discussed in the current paper, and novel measurement solutions are presented. Proposed methods are simple and robust when compared to other applicable solutions. A common feature shared by all members of the group of the proposed solutions is differentiation. It is achieved by calculating the differences between synchronously acquired consecutive samples, with lock-in integration and analog differentiation. All these methods enable inherent separation of variations from the static component of the signal. The variable component of the bioimpedance can, thus, be acquired using the full available dynamic range of the apparatus for its detection. Additive disturbing signals and omnipresent wideband noise are considered and the method for their reduction is proposed.
Bioimpedance | Cardiovascular system | Differentiation | Dynamic range | Lock-in detection | Non-invasive measurements | Synchronous measurement | Wearable devices
https://www.mdpi.com/1424-8220/20/5/1363
Scopus