Feasibility study demonstrates distinct optical reflectance patterns in individuals with pressure injuries, indicating impaired microvascular blood flow dynamics under pressure.
Key Points
To evaluate the feasibility of a single-chamber dual-channel near-infrared spectroscopy probe for detecting pressure-modulated subcutaneous microvascular changes.
Designed an optical probe utilizing 740 nm and 850 nm near-infrared LEDs based on the blanching test principle under pressure and non-pressure conditions.
Assessed optical reflectance across 398 anatomical measurement points at high-risk sites in healthy participants and individuals with pressure injuries.
Healthy tissues showed increased reflectance at 740 nm and 850 nm under pressure due to normal blood displacement.