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Special Section Technical Briefs

Wearable Coplanar Capacitive Sensor for Measurement of Water Content—A Preliminary Endeavor1

[+] Author and Article Information
Brant Axt, Song Zhang, Rajesh Rajamani

Department of Mechanical Engineering,
University of Minnesota,
111 Church Street SE,
Minneapolis, MN 55455

DOI: 10.1115/1.4033149Manuscript received March 1, 2016; final manuscript received March 16, 2016; published online May 12, 2016. Editor: William Durfee.

J. Med. Devices 10(2), 020953 (May 12, 2016) (2 pages) Paper No: MED-16-1070; doi: 10.1115/1.4033149 History: Received March 01, 2016; Revised March 16, 2016

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References

Go, A. S. , Mozaffarian, D. , and Roger, V. L. , 2014, “ Heart Disease and Stroke Statistics—2014 Update: A Report From the American Heart Association,” Circulation, 129(3), pp. 28–292. [CrossRef] [PubMed]
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Golombeck, M.-A. , Riedel, C. H. , and Dössel, O. , 2002, “ Calculation of the Dielectric Properties of Biological Tissue Using Simple Models of Cell Patches,” Biomed. Tech., 47(Suppl. 1, Pt. 1), pp. 253–256. [CrossRef]

Figures

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Fig. 1

The proposed effects of edema on tissue

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Fig. 2

The concept behind coplanar capacitor design. The solid lines are high conductivity charge-carrying elements, and the dashed lines are electric field lines.

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Fig. 3

(a) Copper tape-based coplanar capacitive sensor and (b) in vitro test setup schematic

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Fig. 4

(a) Sensor and (b) in vitro test setup

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Fig. 5

(a) Capacitive sensor on the tissue and (b) in vivo test setup

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Fig. 6

(a) In vitro test result and (b) in vivo test result

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