Reliability of Near-Infrared Spectroscopy in People With Dark Skin Pigmentation
- 260 Downloads
Objective. Near-infrared spectroscopy (NIRS) is a promising non-invasive technique for the continuous monitoring of tissue oxygen delivery. NIRS detects light absorbance of haemoglobin chromophores to determine tissue oxygen saturation (StO2). As skin colour is also determined by the presence of chromophores, it is plausible that NIRS signal quality may be affected by dark skin pigmentation. Methods. Tissue saturation in the anterior compartment of the lower leg during isometric contraction was measured using NIRS in 17 volunteers with dark skin pigmentation. Measurements were continued until StO2 was zero percent or until the signal disappeared. Results. The NIRS device failed to register tissue saturation values at some point in nine of seventeen volunteers. This occurred more often in individuals with darker skin. Conclusions. In patients with a dark pigmented skin, NIRS StO2 measurements should be interpreted with caution, as melanin clearly interferes with the quality of the reflected NIRS signal.
Key WordsNear-infrared spectroscopy signal loss skin colour dark skin pigmentation
Unable to display preview. Download preview PDF.
- 6.Breit GA, Gross JH, Watenpaugh DE, Chance B, Hargens AR. Near-infrared spectroscopy for monitoring of tissue oxygenation of exercising skeletal muscle in a chronic compartment syndrome model. JBJS Am 1997; 79: 838–843.Google Scholar
- 7.Mohler LR, Styf JR, Pedowitz RA, Hargens AR, Gershuni DH. Intramuscular deoxygenation during exercise in patients who have chronic anterior compartment syndrome of the leg. JBJS Am 1997; 79: 844–849.Google Scholar
- 19.Bleehen SS. Disorders of skin colour. In: Champion RH, (ed.) Textbook of Dermatology. Oxford: Rook, Wilkinson and Ebling, 1998: 1753–1755.Google Scholar
- 23.Anderson DL, Houk GL, Lewandowski MS, Myers DE, Ortner JP. Tissue Chromophore Measurement System. U.S. Patent No. 5,879,294 March 1999.Google Scholar
- 25.Myers DE. Total Hemoglobin Concentration Measurement. U.S. Patent No. 6,473,632 October 2002.Google Scholar