Assessment of Hyperspectral Imaging in Pressure Injury Healing

Abstract

OBJECTIVE To analyze the blood oxygen concentrations (StO2) of different stages of pressure injury (PI) tissue using hyperspectral images to serve as a guideline for the treatment and care of PIs. METHODS This study used a prospective design. A total of 30 patients with sacral PIs were recruited from the rehabilitation ward of a teaching hospital. The authors used a hyperspectral detector to collect wound images and the Beer-Lambert law to estimate changes in tissue StO2 in different stages of PI. RESULTS The tissue StO2 of healthy skin and that of stage 1 PI skin were similar, whereas the tissue StO2 of the wound in stage 2 PIs was significantly higher than that of healthy skin and scabbed tissue (medians, 82.5%, 74.4%, and 68.3%; P