Multiscale Compression Entropy of Microvascular Blood FlowSignals: Comparison of Results from Laser Speckle Contrastand Laser Doppler Flowmetry Data in Healthy Subjects

Humeau-Heurtier, Anne; Baumert, Mathias; Ábrahám, Pierre

doi:10.3390/e16115777

Cited by 15 publications

(13 citation statements)

References 49 publications

(67 reference statements)

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“…Thus, some works did not use sample entropy but permutation entropy (see, e.g., [8,15]), cross-approximate entropy (see, e.g., [16,17]), compression entropy (see, e.g., [18]), . .…”

Section: Original Multiscale Entropy Algorithmmentioning

confidence: 99%

The Multiscale Entropy Algorithm and Its Variants: A Review

Humeau-Heurtier

2015

Entropy

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Multiscale entropy (MSE) analysis was introduced in the 2002 to evaluate the complexity of a time series by quantifying its entropy over a range of temporal scales. The algorithm has been successfully applied in different research fields. Since its introduction, a number of modifications and refinements have been proposed, some aimed at increasing the accuracy of the entropy estimates, others at exploring alternative coarse-graining procedures. In this review, we first describe the original MSE algorithm. Then, we review algorithms that have been introduced to improve the estimation of MSE. We also report a recent generalization of the method to higher moments.

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“…Thus, some works did not use sample entropy but permutation entropy (see, e.g., [8,15]), cross-approximate entropy (see, e.g., [16,17]), compression entropy (see, e.g., [18]), . .…”

Section: Original Multiscale Entropy Algorithmmentioning

confidence: 99%

The Multiscale Entropy Algorithm and Its Variants: A Review

Humeau-Heurtier

2015

Entropy

Self Cite

265

223

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“…A 6 cm 2 of AOS tape was placed to measure the ARTm and an area of 1.5 cm 2 overlaid the AOS as a marked ROI and named ROI 1 (Omarjee et al, 2015;Humeau-Heurtier et al, 2014). An area of thigh was marked as a second ROI, with the same area size as ROI 1 (1.5 cm 2 ) and named ROI 2 which measured the LS (SK) (Figure 1).…”

Section: Accepted Manuscriptmentioning

confidence: 99%

The effect of calf neuromuscular electrical stimulation and intermittent pneumatic compression on thigh microcirculation

Bahadori

Immins

Wainwright

2017

Microvascular Research

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Objective:This study compares the effectiveness of a neuromuscular electrical stimulation (NMES) device and an intermittent pneumatic compression (IPC) device on enhancing microcirculatory blood flow in the thigh of healthy individuals, when stimulation is carried out peripherally at the calf. Materials and Methods:Blood microcirculation of ten healthy individuals was recorded using laser speckle contrast imaging (LSCI) technique. A region of interest (ROI) was marked on each participant thigh.The mean flux within the ROI was calculated at four states: rest, NMES device with visible muscle actuation (VMA), NMES device with no visible muscle actuation (NVMA) and IPC device. Results:Both NMES and IPC devices increased blood flow in the thigh when stimulation was carried out peripherally at the calf. The NMES device increased mean blood perfusion from baseline by 399.8% at the VMA state and 150.6% at the NVMA state, IPC device increased the mean blood perfusion by 117.3% from baseline. Conclusion:The NMES device at VMA state increased microcirculation by more than a factor of 3 in contrast to the IPC device. Even at the NVMA state, the NMES device increased blood flow ACCEPTED MANUSCRIPT A C C E P T E D M A N U S C R I P Tby 23% more than the IPC device. Given the association between increased microcirculation and reduced oedema, NMES may be a more effective modality than IPC at reducing oedema, therefore further research is needed to explore this. ACCEPTED MANUSCRIPT A C C E P T E D M A N U S C R I P T HighlightsThe NMES device with VMA increased mean blood flow from baseline by 400%.The NMES device with NVMA increased mean blood flow from baseline by 151%.IPC device increased the mean blood flow from baseline by 117%. Keywords Neuromuscular electrical stimulationIntermittent pneumatic compression MicrocirculationLaser speckle contrast imaging (LSCI) technique

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“…Rashidi et al [26,27] analyzed entropy generation in a steady MHD flow due to a rotating porous disk in a nanoluid and convective MHD flow of third grade non-Newtonian fluid over a stretching sheet. A few pertinent studies on said topic are mentioned in [28][29][30][31][32].…”

Section: Introductionmentioning

confidence: 99%