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A method for measuring oxygen distributions in tissue using frequency domain phosphorometry.

Sergei A Vinogradov1, Maria A Fernandez-Seara, Benjamin W Dupan

  • 1Department of Biochemistry and Biophysics, School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA. vinograd@mail.med.upenn.edu

Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology
|June 14, 2002
PubMed
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Phosphor lifetime in blood reveals local oxygen levels. A new multi-frequency system non-invasively measures oxygen distributions in tissue in vivo using frequency domain time-resolved phosphorometry.

Area of Science:

  • Biomedical Optics
  • Physiology
  • Analytical Chemistry

Background:

  • Phosphorescence lifetime of phosphors in biological fluids correlates with local oxygen concentration.
  • In vivo phosphor administration results in a distribution of lifetimes reflecting varied oxygen concentrations within tissue volumes.
  • Assessing oxygen distribution is crucial for understanding tissue physiology and disease states.

Purpose of the Study:

  • To describe a novel multi-frequency system for measuring oxygen distributions in tissue.
  • To demonstrate the utility of frequency domain time-resolved phosphorometry for non-invasive oxygen sensing.

Main Methods:

  • Utilized frequency domain time-resolved phosphorometry.
  • Developed and employed a multi-frequency system for phosphorescence lifetime measurements.

Related Experiment Videos

  • Applied the system for in vivo measurements of oxygen distributions in biological fluids.

    • Main Results:

    • Demonstrated that phosphorescence lifetime is dependent on local oxygen concentration.
    • Observed a distribution of lifetimes corresponding to oxygen concentration variations in vivo.
    • Successfully measured oxygen distributions non-invasively and in real-time.

    Conclusions:

    • Frequency domain time-resolved phosphorometry is a viable method for assessing oxygen distributions in vivo.
    • The developed multi-frequency system enables non-invasive, real-time measurement of tissue oxygenation.
    • This technology holds potential for improved diagnostics and monitoring of conditions related to oxygen levels.