Coherence between fluctuations in blood flow and oxygen saturation

Alan Bernjak, Aneta Stefanovska, Peter V.E. McClintock, P. Jane Owen-Lynch, Peter B.M. Clarkson

Research output: Contribution to journalArticle

41 Citations (Scopus)

Abstract

We have determined the wavelet phase coherence between simultaneously recorded microvascular blood flow and oxygen saturation signals from 88 healthy subjects, thus enabling us to study their common fluctuations. Measurements were taken for 30 min from the arm and leg, at two depths. In the skin, blood flow and oxygen saturation were found to be coherent both at the cardiac frequency and below 0.1 Hz down to about 0.01 Hz. Coherence in the arm extends to lower frequencies than that in the leg. From the deeper recordings, no coherence was found on either limb. The existence of coherence between skin blood flow and oxygen saturation demonstrates causal connections between them within certain frequency ranges. The method has yielded the first detailed insight into the dynamics of blood oxygenation.

Original languageEnglish
Article number1240013
JournalFluctuation and Noise Letters
Volume11
Issue number1
DOIs
Publication statusPublished - 31 Mar 2012
Externally publishedYes

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blood flow
Blood Flow
Saturation
Oxygen
Fluctuations
saturation
oxygen
Skin
phase coherence
oxygenation
limbs
blood
frequency ranges
recording
Cardiac
low frequencies
Blood
Low Frequency
Wavelets
Range of data

Cite this

Bernjak, Alan ; Stefanovska, Aneta ; McClintock, Peter V.E. ; Owen-Lynch, P. Jane ; Clarkson, Peter B.M. / Coherence between fluctuations in blood flow and oxygen saturation. In: Fluctuation and Noise Letters. 2012 ; Vol. 11, No. 1.
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Coherence between fluctuations in blood flow and oxygen saturation. / Bernjak, Alan; Stefanovska, Aneta; McClintock, Peter V.E.; Owen-Lynch, P. Jane; Clarkson, Peter B.M.

In: Fluctuation and Noise Letters, Vol. 11, No. 1, 1240013, 31.03.2012.

Research output: Contribution to journalArticle

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