Stretchable PPG sensor with light polarization for physical activity–permissible monitoring

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Abstract

Skin-attachable sensors, which represent the ultimate form of wearable electronic devices that ensure conformal contact with skin, suffer from motion artifact limitations owing to relative changes in position between the sensor and skin during physical activities. In this study, a polarization-selective structure of a skin-conformable photoplethysmographic (PPG) sensor was developed to decrease the amount of scattered light from the epidermis, which is the main cause of motion artifacts. The motion artifacts were suppressed more than 10-fold in comparison with those of rigid sensors. The developed sensor—with two orthogonal polarizers—facilitated successful PPG signal monitoring during wrist angle movements corresponding to high levels of physical activity, enabling continuous monitoring of daily activities, even while exercising for personal health care.

Abstract

Two orthogonal polarizers in a conformal photoplethysmographic patch improved signal accuracy by suppressing motion artifacts.

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Most cited references 31

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Photoplethysmography and its application in clinical physiological measurement

John Allen (2007)

Physiological Measurement, 28(3), R1-R39

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Highly skin-conformal microhairy sensor for pulse signal amplification.

Zhenan Bao, Changhyun Pang, Ja Koo … (2015)

A bioinspired microhairy sensor is developed to enable ultraconformability on nonflat surfaces and significant enhancement in the signal-to-noise ratio of the retrieved signals. The device shows ≈12 times increase in the signal-to-noise ratio in the generated capacitive signals, allowing the ultraconformal microhair pressure sensors to be capable of measuring weak pulsations of internal jugular venous pulses stemming from a human neck.

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Accuracy in Wrist-Worn, Sensor-Based Measurements of Heart Rate and Energy Expenditure in a Diverse Cohort

Anna Shcherbina, C Mattsson, Daryl Waggott … (2017)

The ability to measure physical activity through wrist-worn devices provides an opportunity for cardiovascular medicine. However, the accuracy of commercial devices is largely unknown. The aim of this work is to assess the accuracy of seven commercially available wrist-worn devices in estimating heart rate (HR) and energy expenditure (EE) and to propose a wearable sensor evaluation framework. We evaluated the Apple Watch, Basis Peak, Fitbit Surge, Microsoft Band, Mio Alpha 2, PulseOn, and Samsung Gear S2. Participants wore devices while being simultaneously assessed with continuous telemetry and indirect calorimetry while sitting, walking, running, and cycling. Sixty volunteers (29 male, 31 female, age 38 ± 11 years) of diverse age, height, weight, skin tone, and fitness level were selected. Error in HR and EE was computed for each subject/device/activity combination. Devices reported the lowest error for cycling and the highest for walking. Device error was higher for males, greater body mass index, darker skin tone, and walking. Six of the devices achieved a median error for HR below 5% during cycling. No device achieved an error in EE below 20 percent. The Apple Watch achieved the lowest overall error in both HR and EE, while the Samsung Gear S2 reported the highest. In conclusion, most wrist-worn devices adequately measure HR in laboratory-based activities, but poorly estimate EE, suggesting caution in the use of EE measurements as part of health improvement programs. We propose reference standards for the validation of consumer health devices (http://precision.stanford.edu/).

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Author and article information

Contributors

Gae Hwang Lee:

ORCID: https://orcid.org/0000-0002-4521-8957

Role: ConceptualizationRole: Data curationRole: Formal analysisRole: InvestigationRole: MethodologyRole: ResourcesRole: SoftwareRole: ValidationRole: VisualizationRole: Writing - original draftRole: Writing - review & editing

Hyunbum Kang:

ORCID: https://orcid.org/0000-0001-8479-2495

Role: ConceptualizationRole: InvestigationRole: MethodologyRole: ValidationRole: VisualizationRole: Writing - original draft

Jong Won Chung:

ORCID: https://orcid.org/0000-0002-9799-7438

Role: MethodologyRole: VisualizationRole: Writing - original draftRole: Writing - review & editing

Yeongjun Lee:

ORCID: https://orcid.org/0000-0002-2488-9903

Role: InvestigationRole: MethodologyRole: Writing - original draft

Hyunjun Yoo:

ORCID: https://orcid.org/0000-0003-1030-5628

Role: InvestigationRole: ResourcesRole: Writing - review & editing

Sujin Jeong:

ORCID: https://orcid.org/0000-0002-3414-0576

Role: Investigation

Hyeon Cho:

ORCID: https://orcid.org/0000-0002-2381-0335

Role: InvestigationRole: Resources

Joo-Young Kim:

ORCID: https://orcid.org/0000-0001-8422-4551

Role: InvestigationRole: Project administrationRole: Validation

Sung-Gyu Kang:

ORCID: https://orcid.org/0000-0002-0388-6412

Role: InvestigationRole: Methodology

Ji Young Jung: Role: InvestigationRole: Resources

Suk Gyu Hahm:

ORCID: https://orcid.org/0000-0002-2239-4480

Role: InvestigationRole: Methodology

Jeahyuck Lee: Role: InvestigationRole: Validation

In-Jo Jeong: Role: InvestigationRole: Validation

Minho Park: Role: InvestigationRole: Validation

Gunkuk Park: Role: InvestigationRole: Validation

In Ho Yun: Role: Conceptualization

Justin Younghyun Kim: Role: InvestigationRole: Project administrationRole: Validation

Yongtaek Hong:

ORCID: https://orcid.org/0000-0001-9399-5948

Role: Formal analysisRole: InvestigationRole: ResourcesRole: ValidationRole: VisualizationRole: Writing - review & editing

Youngjun Yun:

ORCID: https://orcid.org/0000-0002-3639-9741

Role: ConceptualizationRole: Data curationRole: Funding acquisitionRole: MethodologyRole: Project administrationRole: SupervisionRole: ValidationRole: VisualizationRole: Writing - original draftRole: Writing - review & editing

Sung-Han Kim:

ORCID: https://orcid.org/0000-0001-5329-8056

Role: Project administration

Byoung Ki Choi: Role: ConceptualizationRole: Project administrationRole: Supervision

Journal

Journal ID (nlm-ta): Sci Adv

Journal ID (iso-abbrev): Sci Adv

Journal ID (publisher-id): sciadv

Journal ID (hwp): advances

Title: Science Advances

Publisher: American Association for the Advancement of Science

ISSN (Electronic): 2375-2548

Publication date Collection: April 2022

Publication date (Electronic, pub): 13 April 2022

Volume: 8

Issue: 15

Electronic Location Identifier: eabm3622

Affiliations

[1 ]Organic Material Lab., Samsung Advanced Institute of Technology (SAIT), Samsung Electronics, Suwon 16678, Korea.

[2 ]Department of Electrical and Computer Engineering, Seoul National University, Seoul 08826, Korea.

[3 ]Health H/W R&D Group, Communications Business, Samsung Electronics, Suwon 16677, Korea.

Author notes

[* ]Corresponding author. Email: youngjun.yun@ 123456samsung.com

[†]

These authors contributed equally to this work.

Author information

Gae Hwang Lee https://orcid.org/0000-0002-4521-8957

Hyunbum Kang https://orcid.org/0000-0001-8479-2495

Jong Won Chung https://orcid.org/0000-0002-9799-7438

Yeongjun Lee https://orcid.org/0000-0002-2488-9903

Hyunjun Yoo https://orcid.org/0000-0003-1030-5628

Sujin Jeong https://orcid.org/0000-0002-3414-0576

Hyeon Cho https://orcid.org/0000-0002-2381-0335

Joo-Young Kim https://orcid.org/0000-0001-8422-4551

Sung-Gyu Kang https://orcid.org/0000-0002-0388-6412

Suk Gyu Hahm https://orcid.org/0000-0002-2239-4480

Yongtaek Hong https://orcid.org/0000-0001-9399-5948

Youngjun Yun https://orcid.org/0000-0002-3639-9741

Sung-Han Kim https://orcid.org/0000-0001-5329-8056

Article

Publisher ID: abm3622

DOI: 10.1126/sciadv.abm3622

PMC ID: 9007514

PubMed ID: 35417230

SO-VID: 86f696ab-47f5-4067-a656-6522ff3fb377

Copyright © Copyright © 2022 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).

License:

This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license, which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited.

History

Date received : 12 September 2021

Date accepted : 24 February 2022

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Stretchable PPG sensor with light polarization for physical activity–permissible monitoring

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Most cited references 31

Photoplethysmography and its application in clinical physiological measurement

Highly skin-conformal microhairy sensor for pulse signal amplification.

Accuracy in Wrist-Worn, Sensor-Based Measurements of Heart Rate and Energy Expenditure in a Diverse Cohort

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Cited by 15

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