scholarly journals Facial skin blood perfusion change based liveness detection using video images

2019 ◽  
Vol 102 (6) ◽  
pp. 42-51
Author(s):  
Kazutoshi Ukai ◽  
Rashedur Rahman ◽  
Syoji Kobashi
Keyword(s):  
Blood Perfusion ◽  
Facial Skin ◽  
Liveness Detection ◽  
Video Images ◽  
Skin Blood Perfusion

scholarly journals Laterality of Blood Perfusion in the Lower Extremities after Drinking Saline at Different Temperatures

2020 ◽  
Author(s):  
Shuyong Jia ◽  
Qizhen Wang ◽  
Hongyan Li ◽  
Xiaojing Song ◽  
Shuyou Wang ◽  
...  
Keyword(s):  
Cold Water ◽  
Lower Extremities ◽  
Blood Perfusion ◽  
Dominant Frequency ◽  
Frequency Interval ◽  
Laterality Index ◽  
Skin Blood Perfusion ◽  
Before And After ◽  
Different Temperatures ◽  
Weak Negative Correlation

Abstract Background: Skin blood flux (SkBF) changes caused by drinking cold water are generally associated with vagal tone and osmotic factors in the digestive system. However, the distribution and regulation of bilateral blood flow are not symmetrical but exhibit a certain laterality. The aim of this study was to analyze the laterality of SkBF after drinking saline (0.9%) at different temperatures by monitoring blood flux in the bilateral lower extremities.Methods: A total of 60 subjects were recruited for this study, and all subjects completed all measurements. Subjects were randomly divided into a 4 °C group, 10 °C group and 30 °C group. For every subject, skin blood perfusion of bilateral Zusanli acupoints (ST 36) was recorded simultaneously before and after drinking 500 ml of 0.9% saline using a PeriFlux System 5000. The electrogastrogram (EGG) was also monitored, and the dominant frequency of the EGG and heart rate variability were analyzed.Results: The results indicated that after drinking saline at different temperatures, the laterality index of SkBF at the lower extremities was different. Drinking 30 °C saline can increase the laterality index of the lower extremities. Stimulation at 4 °C and 10 °C resulted in a decrease in the DF of the EGG and an increased RMSSD of the RR interval. Although this laterality is mainly contributed to by frequency interval V, there was a weak negative correlation between the laterality index of frequency interval I or II and RMSSD.Conclusion: There was laterality of blood perfusion in the lower extremities after drinking saline at different temperatures.

scholarly journals The influence of local pressure on evaluation parameters of skin blood perfusion and fluorescence

2017 ◽  
Author(s):  
E. A. Zherebtsov ◽  
K. Y. Kandurova ◽  
E. S. Seryogina ◽  
I. O. Kozlov ◽  
V. V. Dremin ◽  
...  
Keyword(s):  
Blood Perfusion ◽  
Local Pressure ◽  
Skin Blood Perfusion ◽  
Evaluation Parameters

scholarly journals Comparative pilot study on the effects of pulsating and static cupping on non-specific neck pain and local skin blood perfusion

2018 ◽  
Vol 5 (4) ◽  
pp. 400-410 ◽  
Author(s):  
Yang Yang ◽  
Liangxiao Ma ◽  
Tingli Niu ◽  
Junxiang Wang ◽  
Yue Song ◽  
...  
Keyword(s):  
Pilot Study ◽  
Neck Pain ◽  
Blood Perfusion ◽  
Local Skin ◽  
Skin Blood Perfusion

scholarly journals H1-antihistamines suppress wheal-and-flare reaction and skin blood perfusion measured by Laser Dopppler flowmetry: randomized, double-blind, placebo-controlled, crossover design study

2010 ◽  
Vol 64 (5-6) ◽  
pp. 175-181
Author(s):  
Māris Bukovskis ◽  
Madara Tirzīte ◽  
Gunta Strazda ◽  
Normunds Jurka ◽  
Renāte Ligere ◽  
...  
Keyword(s):  
Blood Perfusion ◽  
Sedative Effect ◽  
Crossover Design ◽  
Design Study ◽  
Double Blind ◽  
Double Blind Placebo ◽  
Skin Blood Perfusion ◽  
H1 Antihistamines ◽  
Flare Reaction ◽  
Wheal And Flare

H1-antihistamines suppress wheal-and-flare reaction and skin blood perfusion measured by Laser Dopppler flowmetry: randomized, double-blind, placebo-controlled, crossover design study The aim of our study was to compare the influence of pre-treatment with H1-antihistamines (levocetirizine, desloratadine, clemastine, quifenadine, and sequifenadine) and a placebo on the histamine-induced weal and flare reaction, increase of skin blood perfusion and sedation. Thirty healthy volunteers were enrolled in the study. The study design was a prospective, randomised, double-blind, placebo-controlled, crossover, balanced clinical trial. Volunteers in randomised and double-blind order were treated with oral levocetirizine 5 mg, desloratadine 5 mg, clemastine 1 mg, quifenadine 50 mg, sequifenadine 50 mg or a placebo. Two hours after intake of medication, the histamine skin prick test was performed and skin blood perfusion was registered with further evaluation of sedative effect. We conclude that levocetirizine induced a significant and pronounced decrease of weal and flare reaction and skin blood perfusion compared to the placebo and the other H1-antihistamines. The effect of quifenadine and sequifenadine on weal reaction area was similar to desloratadine and clemastine. Regarding the sedative effect, we can conclude that second generation antihistamines appear to be not non-sedative but the least impairing, and the first generation antihistamines appear to be the most impairing on central nervous system function. There is a necessity to consider the sedating potential of antihistamines, along with other factors such as efficacy, when prescribing antihistamines to patients.

Sign in / Sign up

Export Citation Format

Share Document