Rights statement: Downgraded to postprint Electronic version of this article published as Coherence between fluctuations in blood flow and oxygen saturation in Fluctuation and Noise Letters 11, 1, 2012, 1240013 10.1142/S0219477512400135 © [copyright World Scientific Publishing Company] http://www.worldscientific.com/doi/abs/10.1142/S0219477512400135
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Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Coherence between fluctuations in blood flow and oxygen saturation
AU - Bernjak, Alan
AU - Stefanovska, Aneta
AU - McClintock, Peter V. E.
AU - Owen-Lynch, P. Jane
AU - Clarkson, Peter B. M.
N1 - Electronic version of this article published as Coherence between fluctuations in blood flow and oxygen saturation in Fluctuation and Noise Letters 11, 1, 2012, 1240013 10.1142/S0219477512400135 © [copyright World Scientific Publishing Company] http://www.worldscientific.com/doi/abs/10.1142/S0219477512400135
PY - 2012/3
Y1 - 2012/3
N2 - 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 30min 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 0.1Hz down to about 0.01Hz. 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.
AB - 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 30min 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 0.1Hz down to about 0.01Hz. 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.
KW - Wavelet phase coherence
KW - blood flow
KW - oxygen saturation
KW - microcirculation
U2 - 10.1142/S0219477512400135
DO - 10.1142/S0219477512400135
M3 - Journal article
VL - 11
SP - -
JO - Fluctuation and Noise Letters
JF - Fluctuation and Noise Letters
SN - 0219-4775
IS - 1
M1 - 1240013
ER -