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Open Access 01-05-2019 | Hypotension | Original Article

Sensitivity and reliability of cerebral oxygenation responses to postural changes measured with near-infrared spectroscopy

Authors: Arjen Mol, Jeffrey H. H. Woltering, Willy N. J. M. Colier, Andrea B. Maier, Carel G. M. Meskers, Richard J. A. van Wezel

Published in: European Journal of Applied Physiology | Issue 5/2019

Abstract

Purpose

Cerebral oxygenation as measured by near-infrared spectroscopy (NIRS) might be useful to discriminate between physiological and pathological responses after standing up in individuals with orthostatic hypotension. This study addressed the physiological sensitivity of the cerebral oxygenation responses as measured by NIRS to different types and speeds of postural changes in healthy adults and assessed the reliability of these responses.

Methods

Cerebral oxygenated hemoglobin (O₂Hb), deoxygenated hemoglobin (HHb) and tissue saturation index (TSI) were measured bilaterally on the forehead of 15 healthy individuals (12 male, age range 18–27) using NIRS. Participants performed three repeats of sit to stand, and slow and rapid supine to stand movements. Responses were defined as the difference between mean, minimum and maximum O₂Hb, HHb and TSI values after standing up and baseline. Test–retest, interobserver and intersensor reliabilities were addressed using intraclass correlation coefficients (ICCs).

Results

The minimum O₂Hb response was most sensitive to postural changes and showed significant differences (− 4.09 µmol/L, p < 0.001) between standing up from sitting and supine position, but not between standing up at different speeds (− 0.31 µmol/L, p = 0.70). The minimum O₂Hb response was the most reliable parameter (ICC > 0.6).

Conclusions

In healthy individuals, NIRS-based cerebral oxygenation parameters are sensitive to postural change and discriminate between standing up from supine and sitting position with minimum O₂Hb response as the most sensitive and reliable parameter. The results underpin the potential value for future clinical use of NIRS in individuals with orthostatic hypotension.

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Title: Sensitivity and reliability of cerebral oxygenation responses to postural changes measured with near-infrared spectroscopy
Authors: Arjen Mol
Jeffrey H. H. Woltering
Willy N. J. M. Colier
Andrea B. Maier
Carel G. M. Meskers
Richard J. A. van Wezel
Publication date: 01-05-2019
Publisher: Springer Berlin Heidelberg
Keywords: Hypotension
Hypotension
Published in: European Journal of Applied Physiology / Issue 5/2019
Print ISSN: 1439-6319
Electronic ISSN: 1439-6327
DOI: https://doi.org/10.1007/s00421-019-04101-0

At a glance: The STEP trials

Springer Medicine

Sensitivity and reliability of cerebral oxygenation responses to postural changes measured with near-infrared spectroscopy

Abstract

Purpose

Methods

Results

Conclusions

At a glance: The STEP trials

Springer Medicine

Abstract

Purpose

Methods

Results

Conclusions

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