Light Transmission during occlusion in species with differing rouleaux formation

Mark McEwen, Karen Reynolds

    Research output: Contribution to journalArticlepeer-review


    This pilot study investigates the transmission of light through occluded tissues of human subjects, horses and sheep with a view to greater understanding of rouleaux formation in vivo, and its effect on light transmission through tissue. Light transmission was measured at 3 wavelengths (660, 810 and 940nm) during short (60s) periods of blood occlusion. Exponential type increases in the mean light transmission were recorded for human subjects, but were absent in signals from sheep and horses. Observations in general support the evidence that occlusion may cause rouleaux formation in vivo, but the association between rouleaux formation and light transmission changes during occlusion is complex, and occlusion may have effects on light transmission beyond the formation of rouleaux.

    Original languageEnglish
    Pages (from-to)247-252
    Number of pages6
    JournalEngineering Letters
    Issue number3
    Publication statusPublished - 27 Aug 2012


    • Light transmission
    • Occlusion
    • Red blood cells
    • Rouleau
    • Rouleaux


    Dive into the research topics of 'Light Transmission during occlusion in species with differing rouleaux formation'. Together they form a unique fingerprint.

    Cite this