Study of skin flow motion pattern using photoplethysmogram

Nirala, Neelamshobha; PeriyasamyR.,; KumarAwanish,

doi:10.1504/ijaip.2020.107525

Cited by 2 publications

(2 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For the frequency of 125 Hz (it typically matches the frequency emitted by rotary machines likely to be responsible for the onset of VWF), six amplitudes were tested: 1, 2, 5, 10, 20, and 40 m•s −2 rms. The data were processed by repeated measures ANOVA (10 s measure) and by Morlet wavelet analyses (1 min measure) [62][63][64].…”

Section: Model A2: Temperature Induced By the Vibrationsmentioning

confidence: 99%

A Multiscale Approach for Predicting Certain Effects of Hand-Transmitted Vibration on Finger Arteries

et al. 2022

View full text Add to dashboard Cite

Prolonged exposure to strong hand-arm vibrations can lead to vascular disorders such as Vibration White Finger (VWF). We modeled the onset of this peripheral vascular disease in two steps. The first consists in assessing the reduction in shearing forces exerted by the blood on the walls of the arteries (Wall Shear Stress—WSS) during exposure to vibrations. An acute but repeated reduction in WSS can lead to arterial stenosis characteristic of VWF. The second step is devoted to using a numerical mechano-biological model to predict this stenosis as a function of WSS. WSS is reduced by a factor of 3 during exposure to vibration of 40 m·s−2. This reduction is independent of the frequency of excitation between 31 Hz and 400 Hz. WSS decreases logarithmically when the amplitude of the vibration increases. The mechano-biological model simulated arterial stenosis of 30% for an employee exposed for 4 h a day for 10 years. This model also highlighted the chronic accumulation of matrix metalloproteinase 2. By considering daily exposure and the vibratory level, we can calculate the degree of stenosis, thus that of the disease for chronic exposure to vibrations.

show abstract

Section: Model A2: Temperature Induced By the Vibrationsmentioning

confidence: 99%

A Multiscale Approach for Predicting Certain Effects of Hand-Transmitted Vibration on Finger Arteries

et al. 2022

View full text Add to dashboard Cite

show abstract

“…The relevance of the study of the photoplethysmogram low-frequency oscillation rhythms of less than 0.5 Hz is due to the fact that the corresponding spectral components can characterize changes in the vascular tone determined by the influence of various physiological mechanisms of regulation such as: endothelial, neurogenic, myogenic, and respiratory. Thus, e.g., a decrease in the amplitude of the PPGI signal spectral components in the neurogenic, myogenic, and respiratory ranges was found in a group of patients with diabetes mellitus [98]. In [99], a decrease in the amplitude of the vasomotion with a frequency of about 0.1 Hz in the presence of allergy was recorded with the PPGI.…”

Section: Low-frequency Rhythms Of the Ppgi Signal Oscillationsmentioning

confidence: 99%

Photoplethysmographic Imaging of Hemodynamics and Two-Dimensional Oximetry

2022

View full text Add to dashboard Cite

The review of recent papers devoted to actively developing methods of photoplethysmographic imaging (the PPGI) of blood volume pulsations in vessels and non-contact two-dimensional oximetry on the surface of a human body has been carried out. The physical fundamentals and technical aspects of the PPGI and oximetry have been considered. The manifold of the physiological parameters available for the analysis by the PPGI method has been shown. The prospects of the PPGI technology have been discussed. The possibilities of non-contact determination of blood oxygen saturation SpO 2 (pulse saturation O 2 ) have been described. The relevance of remote determination of the level of oxygenation in connection with the spread of a new coronavirus infection SARS-CoV-2 (COVID-19) has been emphasized. Most of the works under consideration cover the period 2010–2021.

show abstract

Study of skin flow motion pattern using photoplethysmogram

Cited by 2 publications

References 0 publications

A Multiscale Approach for Predicting Certain Effects of Hand-Transmitted Vibration on Finger Arteries

A Multiscale Approach for Predicting Certain Effects of Hand-Transmitted Vibration on Finger Arteries

Photoplethysmographic Imaging of Hemodynamics and Two-Dimensional Oximetry

Contact Info

Product

Resources

About