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Indocyanine green near-infrared lymphangiography for evaluation of effectiveness of edema fluid flow under therapeutic compression.
Journal of Biophotonics 2018 August
The commonly used modalities for therapy of limb lymphedema are manual lymphatic drainage, manual devices moving edema fluid and intermittent pneumatic compression (IPC). What seems to be necessary for validation of the effect of the compression procedure is imaging of the mobilized moving edema fluid. Picture of edema fluid flow would allow the therapist to use force adjusted to the tissue volume and stiffness differing in various limb regions as well as identify sites of abundant accumulation of fluid requiring more compression. The purpose of the present study was to visualize tissue edema fluid flow during manual drainage, Linforoll massage, IPC and bandaging. To obtain data how high compression pressures should be used to mobilize indocyanine green (ICG)-stained fluid, concomitantly tissue fluid pressure measurements were performed. The following observations were obtained: (1) the possibility of real-time observation of edema fluid movement using various compression modalities, (2) the threshold pressures necessary to move edema fluid to be over 80 mm Hg in the compression device and over 40 mm Hg in the tissue fluid and (3) inefficacy of compression in some cases despite applying high compression force. These observations point to the need of ICG lymphangiography before compression therapy in each patient. The images observed during the compression procedure give an insight into the distribution of edema fluid, sites of its accumulation and efficacy of applied external force on fluid mobilization.
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