Bibliographic Details
| Title: |
The utility of the reperfusion rate of tissue oxygen saturation as a measure of vascular endothelial function in adolescents: reliability, validity and sensitivity |
| Authors: |
Sascha H. Kranen, Ricardo S. Oliveira, Bert Bond, Craig A. Williams, Alan R. Barker |
| Source: |
Frontiers in Physiology, Vol 14 (2023) |
| Publisher Information: |
Frontiers Media S.A., 2023. |
| Publication Year: |
2023 |
| Collection: |
LCC:Physiology |
| Subject Terms: |
FMD, NIRS, vascular function, repeatability, youth, Physiology, QP1-981 |
| More Details: |
Introduction: The near-infrared spectroscopy (NIRS)-derived reperfusion rate of tissue oxygen saturation (slope 2 StO2) may provide a surrogate measure of vascular function, however, this has yet to be examined in a paediatric population. This study investigated in adolescents: 1) the between-day reliability of NIRS-derived measurements; 2) the relationship between slope 2 StO2 and macro- (flow-mediated dilation, FMD) and microvascular (peak reactive hyperaemia, PRH) function; and 3) the effect of high-intensity interval exercise (HIIE) on slope 2 StO2, FMD, and PRH.Methods: Nineteen boys (13.3 ± 0.5 y) visited the laboratory on two occasions, separated by ∼ 1 week. On visit 1, participants underwent simultaneous assessment of brachial artery FMD and slope 2 StO2 and PRH on the internal face of the forearm. On visit 2, participants completed a bout of HIIE with slope 2 StO2, FMD and PRH measured pre-, immediately post- and 1.5 h post-exercise.Results: Slope 2 StO2 showed no mean bias (p = 0.18) and an intraclass correlation coefficient of 0.67 (p = 0.003) between visits. No significant correlation between slope 2 StO2 and FMD or PRH was observed on visit 1 (r = −0.04, p = 0.89 and r = −0.30, p = 0.23, respectively) or visit 2 pre-exercise (r = −0.28, p = 0.25 and r = −0.31, p = 0.20, respectively). Compared to pre-exercise, FMD decreased immediately post-exercise (p < 0.001) and then increased 1.5 h post-exercise (p < 0.001). No significant change was detected for slope 2 StO2 (p = 0.30) or PRH (p = 0.55) following HIIE.Conclusion: In adolescents, slope 2 StO2 can be measured reliably, however, it is not correlated with FMD or PRH and does not follow the acute time course of changes in FMD post-exercise. Hence, the use of slope 2 StO2 as a surrogate measure of vascular function in youth must be refuted. |
| Document Type: |
article |
| File Description: |
electronic resource |
| Language: |
English |
| ISSN: |
1664-042X |
| Relation: |
https://www.frontiersin.org/articles/10.3389/fphys.2023.1163474/full; https://doaj.org/toc/1664-042X |
| DOI: |
10.3389/fphys.2023.1163474 |
| Access URL: |
https://doaj.org/article/190ec6942f484d6e85859b658e4a1c78 |
| Accession Number: |
edsdoj.190ec6942f484d6e85859b658e4a1c78 |
| Database: |
Directory of Open Access Journals |
