Sweat monitoring beneath garments using passive, wireless resonant sensors interfaced with laser-ablated microfluidics

Abstract Sweat loss can help determine hydration status of individuals working in harsh conditions, which is especially relevant to those who wear thick personal protective equipment (PPE) such as firefighters. A wireless, passive, conformable sweat sensor sticker is described here that can be worn...

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Autores principales:	Adam R. Carr, Yash H. Patel, Charles R. Neff, Sadaf Charkhabi, Nathaniel E. Kallmyer, Hector F. Angus, Nigel F. Reuel
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2020
Materias:	Computer applications to medicine. Medical informatics R858-859.7
Acceso en línea:	https://doaj.org/article/3fcfc89e29dd4a18b2cd3ae8eacb177a
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spelling	oai:doaj.org-article:3fcfc89e29dd4a18b2cd3ae8eacb177a2021-12-02T17:16:05ZSweat monitoring beneath garments using passive, wireless resonant sensors interfaced with laser-ablated microfluidics10.1038/s41746-020-0270-22398-6352https://doaj.org/article/3fcfc89e29dd4a18b2cd3ae8eacb177a2020-04-01T00:00:00Zhttps://doi.org/10.1038/s41746-020-0270-2https://doaj.org/toc/2398-6352Abstract Sweat loss can help determine hydration status of individuals working in harsh conditions, which is especially relevant to those who wear thick personal protective equipment (PPE) such as firefighters. A wireless, passive, conformable sweat sensor sticker is described here that can be worn under and interrogated through thick clothing to simultaneously measure sweat loss volume and conductivity. The sticker consists of a laser-ablated, microfluidic channel and a resonant sensor transducer. The resonant sensor is wirelessly read with a handheld vector network analyzer coupled to two, co-planar, interrogation antennas that measure the transmission loss. A sweat proxy is used to fill the channels and it is determined that the sensor can orthogonally determine the sweat conductivity and volume filled in the channel via peak transmission loss magnitude and frequency respectively. A four-person study is then used to determine level of sensor variance caused by local tissue dielectric heterogeneity and sensor-reader orientation.Adam R. CarrYash H. PatelCharles R. NeffSadaf CharkhabiNathaniel E. KallmyerHector F. AngusNigel F. ReuelNature PortfolioarticleComputer applications to medicine. Medical informaticsR858-859.7ENnpj Digital Medicine, Vol 3, Iss 1, Pp 1-9 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	Computer applications to medicine. Medical informatics R858-859.7
spellingShingle	Computer applications to medicine. Medical informatics R858-859.7 Adam R. Carr Yash H. Patel Charles R. Neff Sadaf Charkhabi Nathaniel E. Kallmyer Hector F. Angus Nigel F. Reuel Sweat monitoring beneath garments using passive, wireless resonant sensors interfaced with laser-ablated microfluidics
description	Abstract Sweat loss can help determine hydration status of individuals working in harsh conditions, which is especially relevant to those who wear thick personal protective equipment (PPE) such as firefighters. A wireless, passive, conformable sweat sensor sticker is described here that can be worn under and interrogated through thick clothing to simultaneously measure sweat loss volume and conductivity. The sticker consists of a laser-ablated, microfluidic channel and a resonant sensor transducer. The resonant sensor is wirelessly read with a handheld vector network analyzer coupled to two, co-planar, interrogation antennas that measure the transmission loss. A sweat proxy is used to fill the channels and it is determined that the sensor can orthogonally determine the sweat conductivity and volume filled in the channel via peak transmission loss magnitude and frequency respectively. A four-person study is then used to determine level of sensor variance caused by local tissue dielectric heterogeneity and sensor-reader orientation.
format	article
author	Adam R. Carr Yash H. Patel Charles R. Neff Sadaf Charkhabi Nathaniel E. Kallmyer Hector F. Angus Nigel F. Reuel
author_facet	Adam R. Carr Yash H. Patel Charles R. Neff Sadaf Charkhabi Nathaniel E. Kallmyer Hector F. Angus Nigel F. Reuel
author_sort	Adam R. Carr
title	Sweat monitoring beneath garments using passive, wireless resonant sensors interfaced with laser-ablated microfluidics
title_short	Sweat monitoring beneath garments using passive, wireless resonant sensors interfaced with laser-ablated microfluidics
title_full	Sweat monitoring beneath garments using passive, wireless resonant sensors interfaced with laser-ablated microfluidics
title_fullStr	Sweat monitoring beneath garments using passive, wireless resonant sensors interfaced with laser-ablated microfluidics
title_full_unstemmed	Sweat monitoring beneath garments using passive, wireless resonant sensors interfaced with laser-ablated microfluidics
title_sort	sweat monitoring beneath garments using passive, wireless resonant sensors interfaced with laser-ablated microfluidics
publisher	Nature Portfolio
publishDate	2020
url	https://doaj.org/article/3fcfc89e29dd4a18b2cd3ae8eacb177a
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Sweat monitoring beneath garments using passive, wireless resonant sensors interfaced with laser-ablated microfluidics

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