Thin, Millimeter Scale Fingernail Sensors For Thermal Characterization Of Nail Bed Tissue

Keywords

fingernail devices; flexible electronics; noninvasive biomedical applications; perfusion tracking; thermal sensors

Abstract

Thin, flexible, body-worn technologies that allow precise, quantitative monitoring of physiological status are of broad current interest due to their potential to improve the cost and effectiveness of healthcare. Although the surface of the skin represents one of the most widely explored points of integration, recently developed millimeter scale wireless sensor platforms allow deployment on alternative surfaces of the body, such as the finger/toenails and the teeth. The work described here introduces a collection of ideas in materials science, device engineering and computational techniques that enables precise characterization of the thermal transport characteristics of the nail bed tissue from measurements on the surface of the nail. Systematic in vitro studies demonstrate the underlying measurement principles, the theoretical models for optimized sensor design and the associated experimental procedures for determining the thermal conductivity of the tissue. Measurements performed on human subjects highlight capabilities in tracking changes in perfusion of the nail bed tissues in response to various external stimuli.

Publication Date

7-25-2018

Publication Title

Advanced Functional Materials

Volume

28

Issue

30

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1002/adfm.201801380

Socpus ID

85050409751 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85050409751

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