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Possible Influences on the Interpretation of Functional Domain (FD) Near-Infrared Spectroscopy (NIRS): An Explorative Study
- Source :
- Applied Spectroscopy. 70:363-371
- Publication Year :
- 2015
- Publisher :
- SAGE Publications, 2015.
-
Abstract
- The influence of subcutaneous adipose tissue (ATT) and oxygen (O2) delivery has been poorly defined in frequency domain (FD) near-infrared spectroscopy (NIRS). Therefore, the aim of this study was to investigate the possible influence of these variables on all FD NIRS responses using a reliable protocol. Moreover, these influences were also investigated when using relative oxy- and deoxyhemoglobin and -myoglobin (oxy[Hb + Mb] and deoxy[Hb + Mb]) values (in %). A regression analysis was carried out for ATT and maximal–minimum oxy[Hb + Mb], deoxy[Hb + Mb], oxygen saturation (SmO2), and total hemoglobin (totHb) amplitudes during an incremental cyclic contraction protocol (ICCP) in a group of 45 participants. Moreover, the same analysis was carried out between subcutaneous ATT and the relative oxy- and deoxy[Hb + Mb] values (in %). In the second part of this study, a regression analysis was performed for peak forearm blood flow (FBF) during ICCP and the absolute and relative NIRS values in a group of 37 participants. Significant exponential correlation coefficients were found between ATT and deoxy[Hb + Mb] (r = 0.53; P 2 amplitudes (r = 0.57; P 2 (r = −0.267; P = 0.111). Significant linear correlation coefficients were found between FBF and deoxy[Hb + Mb] (r = 0.51; P = 0.001), oxy[Hb + Mb] (r = −0.50; P = 0.001), SmO2 (r = −0.54; P = 0.001), and totHb amplitude (r = 0.61; P 2 delivery significantly influence NIRS measurements. To eliminate these influences, use of relative deoxy[Hb + Mb] is advised, especially in clinical settings or in people with a higher subcutaneous ATT layer.
- Subjects :
- Adult
Male
Adolescent
Subcutaneous Fat
Analytical chemistry
030204 cardiovascular system & hematology
Hemoglobins
Young Adult
03 medical and health sciences
chemistry.chemical_compound
0302 clinical medicine
Humans
Instrumentation
Oxygen saturation
Spectroscopy
Spectroscopy, Near-Infrared
Myoglobin
Near-infrared spectroscopy
030229 sport sciences
Total hemoglobin
Oxygen
Cyclic contraction
chemistry
Forearm blood flow
Female
Subcutaneous adipose tissue
Subjects
Details
- ISSN :
- 19433530 and 00037028
- Volume :
- 70
- Database :
- OpenAIRE
- Journal :
- Applied Spectroscopy
- Accession number :
- edsair.doi.dedup.....5175a10e2dcf51476788d877231b5a1e