4 March 2016 Assessment of sacrococcygeal pressure ulcers using diffuse correlation spectroscopy
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Microcirculation is essential for proper supply of oxygen and nutritive substances to the biological tissue and the removal of waste products of metabolism. The determination of microcirculatory blood flow (mBF) is therefore of substantial interest to clinicians for assessing tissue health; particularly in pressure ulceration and suspected deep tissue injury. The goal of this pilot clinical study was to assess deep-tissue pressure ulceration by non-invasively measuring mBF using Diffuse Correlation Spectroscopy (DCS). DCS provides information about the flow of red blood cells in the capillary network by measuring the temporal autocorrelation function of scattering light intensity. A novel optical probe was developed in order to obtain measurements under the load of the subject’s body as pressure is applied (ischemia) and then released (reperfusion) on sacrococcygeal tissue in a hospital bed. Prior to loading measurements, baseline readings of the sacral region were obtained by measuring the subjects in a side-lying position. DCS measurements from the sacral region of twenty healthy volunteers have been compared to those of two patients who initially had similar non-blanchable redness. The temporal autocorrelation function of scattering light intensity of the patient whose redness later disappeared was similar to that of the average healthy subject. The second patient, whose redness developed into an advanced pressure ulcer two weeks later, had a substantial decrease in blood flow while under the loading position compared to healthy subjects. Preliminary results suggest the developed system may potentially predict whether non-blanchable redness will manifest itself as advanced ulceration or dissipate over time.
© (2016) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
David Diaz, David Diaz, Alec Lafontant, Alec Lafontant, Michael Neidrauer, Michael Neidrauer, Michael S. Weingarten, Michael S. Weingarten, Rose Ann DiMaria-Ghalili, Rose Ann DiMaria-Ghalili, Guy W. Fried, Guy W. Fried, Julianne Rece, Julianne Rece, Peter A. Lewin, Peter A. Lewin, Leonid Zubkov, Leonid Zubkov, } "Assessment of sacrococcygeal pressure ulcers using diffuse correlation spectroscopy", Proc. SPIE 9715, Optical Diagnostics and Sensing XVI: Toward Point-of-Care Diagnostics, 97150M (4 March 2016); doi: 10.1117/12.2212980; https://doi.org/10.1117/12.2212980

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