BME Frontiers (Jan 2021)

Bioresorbable Multilayer Photonic Cavities as Temporary Implants for Tether-Free Measurements of Regional Tissue Temperatures

  • Wubin Bai,
  • Masahiro Irie,
  • Zhonghe Liu,
  • Haiwen Luan,
  • Daniel Franklin,
  • Khizar Nandoliya,
  • Hexia Guo,
  • Hao Zang,
  • Yang Weng,
  • Di Lu,
  • Di Wu,
  • Yixin Wu,
  • Joseph Song,
  • Mengdi Han,
  • Enming Song,
  • Yiyuan Yang,
  • Xuexian Chen,
  • Hangbo Zhao,
  • Wei Lu,
  • Giuditta Monti,
  • Iwona Stepien,
  • Irawati Kandela,
  • Chad R. Haney,
  • Changsheng Wu,
  • Sang Min Won,
  • Hanjun Ryu,
  • Alina Rwei,
  • Haixu Shen,
  • Jihye Kim,
  • Hong-Joon Yoon,
  • Wei Ouyang,
  • Yihan Liu,
  • Emily Suen,
  • Huang-yu Chen,
  • Jerry Okina,
  • Jushen Liang,
  • Yonggang Huang,
  • Guillermo A. Ameer,
  • Weidong Zhou,
  • John A. Rogers

DOI
https://doi.org/10.34133/2021/8653218
Journal volume & issue
Vol. 2021

Abstract

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Objective and Impact Statement. Real-time monitoring of the temperatures of regional tissue microenvironments can serve as the diagnostic basis for treating various health conditions and diseases. Introduction. Traditional thermal sensors allow measurements at surfaces or at near-surface regions of the skin or of certain body cavities. Evaluations at depth require implanted devices connected to external readout electronics via physical interfaces that lead to risks for infection and movement constraints for the patient. Also, surgical extraction procedures after a period of need can introduce additional risks and costs. Methods. Here, we report a wireless, bioresorbable class of temperature sensor that exploits multilayer photonic cavities, for continuous optical measurements of regional, deep-tissue microenvironments over a timeframe of interest followed by complete clearance via natural body processes. Results. The designs decouple the influence of detection angle from temperature on the reflection spectra, to enable high accuracy in sensing, as supported by in vitro experiments and optical simulations. Studies with devices implanted into subcutaneous tissues of both awake, freely moving and asleep animal models illustrate the applicability of this technology for in vivo measurements. Conclusion. The results demonstrate the use of bioresorbable materials in advanced photonic structures with unique capabilities in tracking of thermal signatures of tissue microenvironments, with potential relevance to human healthcare.