Theoretical and Experimental Studies of Epidermal Heat Flux Sensors for Measurements of Core Body Temperature

Yihui Zhang, Richard Chad Webb, Hongying Luo, Yeguang Xue, Jonas Kurniawan, Nam Heon Cho, Siddharth Krishnan, Yuhang Li, Yonggang Huang, John A. Rogers*

*Corresponding author for this work

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

Long-term, continuous measurement of core body temperature is of high interest, due to the widespread use of this parameter as a key biomedical signal for clinical judgment and patient management. Traditional approaches rely on devices or instruments in rigid and planar forms, not readily amenable to intimate or conformable integration with soft, curvilinear, time-dynamic, surfaces of the skin. Here, materials and mechanics designs for differential temperature sensors are presented which can attach softly and reversibly onto the skin surface, and also sustain high levels of deformation (e.g., bending, twisting, and stretching). A theoretical approach, together with a modeling algorithm, yields core body temperature from multiple differential measurements from temperature sensors separated by different effective distances from the skin. The sensitivity, accuracy, and response time are analyzed by finite element analyses (FEA) to provide guidelines for relationships between sensor design and performance. Four sets of experiments on multiple devices with different dimensions and under different convection conditions illustrate the key features of the technology and the analysis approach. Finally, results indicate that thermally insulating materials with cellular structures offer advantages in reducing the response time and increasing the accuracy, while improving the mechanics and breathability.

Original languageEnglish (US)
Pages (from-to)119-127
Number of pages9
JournalAdvanced Healthcare Materials
Volume5
Issue number1
DOIs
StatePublished - Jan 1 2016

Fingerprint

Body Temperature
Heat flux
Skin
Theoretical Models
Hot Temperature
Temperature sensors
Mechanics
Reaction Time
Sensors
Equipment and Supplies
Convection
Finite Element Analysis
Temperature
Insulating materials
Cellular Structures
Stretching
Guidelines
Technology
Experiments

Keywords

  • Core body temperature
  • Flexible electronics
  • Heat flux
  • Modeling
  • Stretchable electronics

ASJC Scopus subject areas

  • Biomaterials
  • Biomedical Engineering
  • Pharmaceutical Science

Cite this

Zhang, Yihui ; Webb, Richard Chad ; Luo, Hongying ; Xue, Yeguang ; Kurniawan, Jonas ; Cho, Nam Heon ; Krishnan, Siddharth ; Li, Yuhang ; Huang, Yonggang ; Rogers, John A. / Theoretical and Experimental Studies of Epidermal Heat Flux Sensors for Measurements of Core Body Temperature. In: Advanced Healthcare Materials. 2016 ; Vol. 5, No. 1. pp. 119-127.
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Theoretical and Experimental Studies of Epidermal Heat Flux Sensors for Measurements of Core Body Temperature. / Zhang, Yihui; Webb, Richard Chad; Luo, Hongying; Xue, Yeguang; Kurniawan, Jonas; Cho, Nam Heon; Krishnan, Siddharth; Li, Yuhang; Huang, Yonggang; Rogers, John A.

In: Advanced Healthcare Materials, Vol. 5, No. 1, 01.01.2016, p. 119-127.

Research output: Contribution to journalArticle

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