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Updated: May 25, 2026

Conformable Wearable Electrodes: From Fabrication to Electrophysiological Assessment
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AD5933-based electrical bioimpedance spectrometer. Towards textile-enabled applications.

J Ferreira1, F Seoane, K Lindecrantz

  • 1School of Engineering, University of Borås, 501 90 Sweden. javier.ferreira@hb.se

Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference
|January 19, 2012
PubMed
Summary

A new AD5933-based Electrical Bioimpedance Spectroscopy (EBIS) spectrometer using textile electrodes (Textrodes) shows accurate performance for body fluid monitoring. This system offers a feasible solution for personalized health systems, especially for dialysis patients.

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Area of Science:

  • Biomedical Engineering
  • Wearable Technology
  • Measurement Instrumentation

Background:

  • Advancements in System-On-Chip and textile technology enable wearable measurement devices.
  • Textile Electrodes (Textrodes) are reliable for Electrical Bioimpedance Spectroscopy (EBIS).
  • The AD5933 integrated circuit allows for small-sized EBIS spectrometers.

Purpose of the Study:

  • To implement and evaluate an AD5933-based EBIS spectrometer using Textrodes.
  • To compare its performance against a commercial spectrometer (SFB7).
  • To assess its suitability for estimating Cole parameters for body fluid distribution.

Main Methods:

  • Implementation of an AD5933-based EBIS spectrometer.
  • Performance testing on 2R1C circuits and tetrapolar right-side EBIS measurements.

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  • Comparison of impedance measurements and Cole parameter estimation with SFB7, focusing on the upper frequency range.

    • Main Results:

    • The AD5933-based spectrometer accurately measures impedance above datasheet recommendations.
    • It shows good performance compared to SFB7, with smaller resistance errors and minimal reactance deviation above 270 kHz.
    • Cole parameter estimation (R(0) and R(∞)) showed less than 1% difference compared to SFB7.

    Conclusions:

    • The implemented AD5933-EBIS spectrometer is suitable for accurate impedance measurements with dry Textrodes.
    • This technology is promising for personalized health monitoring systems, particularly for tracking body fluid distribution in patients like those undergoing dialysis.