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Related Experiment Video

Updated: Nov 12, 2025

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Noninvasive Optical Assessment of Implanted Tissue-Engineered Construct Success In Situ.

William R Lloyd1, Seung Yup Lee1, Sakib F Elahi1

  • 1Department of Biomedical Engineering, University of Michigan College of Engineering, Ann Arbor, Michigan, USA.

Tissue Engineering. Part C, Methods
|March 17, 2021
PubMed
Summary
This summary is machine-generated.

Quantitative diffuse reflectance spectroscopy (DRS) offers a noninvasive method to assess tissue-engineered devices. This technique successfully monitored graft success in situ, distinguishing healthy from compromised constructs.

Keywords:
AlloDermEVPOMEdiffuse reflectance spectroscopylight propagation in tissuesoptical diagnostics for medicinetissue diagnosticstissue engineering and regenerative medicine

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Area of Science:

  • Biomedical Engineering
  • Regenerative Medicine
  • Optical Spectroscopy

Background:

  • Tissue-engineered devices require non-destructive monitoring tools for assessing graft success in vivo.
  • Current methods for evaluating implanted tissue constructs are often invasive or lack real-time capabilities.

Purpose of the Study:

  • To develop and validate quantitative diffuse reflectance spectroscopy (DRS) as a label-free, noninvasive, and real-time assessment tool for implanted tissue-engineered devices.
  • To evaluate the ability of DRS to monitor construct success in situ based on optical properties related to revascularization and cellularity.

Main Methods:

  • Quantitative diffuse reflectance spectroscopy (DRS) was applied to human oral keratinocyte constructs implanted in a murine model for 1 and 3 weeks.
  • DRS measured optical absorption (hemoglobin, oxygenation) and scattering (cellular density, layer thickness).
  • Results were compared with destructive histology and noninvasive preimplantation measures.

Main Results:

  • DRS successfully distinguished healthy from stressed constructs at 1 week postimplantation.
  • At 3 weeks, DRS identified constructs with higher postimplantation success.
  • DRS provided insights into revascularization and construct cellularity, correlating with graft outcomes.

Conclusions:

  • Quantitative DRS is a promising, clinically compatible technology for rapid, noninvasive assessment of tissue-engineered constructs in vivo.
  • DRS enables localized, real-time monitoring of graft success, addressing a critical need in tissue engineering.
  • This technique supports longitudinal monitoring of implanted devices without requiring destructive sampling.