Fig. 2From: Hyperspectral Imaging (HSI) as a new diagnostic tool in free flap monitoring for soft tissue reconstruction: a proof of concept studyTissue oxygenation (StO2-) and NIR Perfusion Index of all measured areas at t1 (three areas per flap). The orange square is indicating the critical zone. All areas on viable flaps were outside and at least one area of each revised flap was in the critical zoneBack to article page