Proof-of-concept Study of LymphMonitor 1.0 to Assess the Lymphatic Vessel Function

The indocyanine green in 5% human albumin solution (tracer) (50 μL) will be injected intradermally in both forearms or both lower legs using MicronJet600 microneedles paying attention to the contralateral symmetry of the injections. The signal at the injection sites will be measured over time using a hand-held portable device LymphMeter 1.0 for the total duration of 3 h. In the first hour, the signal will be measured every 15 minutes followed by measurements every half an hour. Immediately after injection (t=0 h), 1.5 h and 3 h after injection the skin area occupied by the tracer will be measured using a standard near-infrared camera, Fluobeam. The dermal reaction at the injection site will be assessed by observations for presence of redness/erythema and measuring its extent according to the needs. The patient will be constantly observed for the signs of allergic reactions, skin irritations or intolerances.