Analysis of week-to-week variability in skin blood flow measurements using wavelet transforms
作者： Yih-Kuen Jan , David M. Brienza , Mary Jo Geyer
DOI: 10.1111/J.1475-097X.2005.00621.X
关键词:
摘要: The study of skin blood flow responses is confounded by temporal variability in measurements. Spectral analysis has been shown useful isolating the effects distinct control mechanisms on various stimuli microcirculatory system. However, sensitivity spectral to blow not reported. This was designed assess week-to-week measurements using wavelet-based spectrum analysis. Ten healthy, young subjects (mean age+/-SD, 30.0+/-3.1 years) were recruited into study. Incremental heating (35-45 degrees C, 1 step min-1) applied over sacrum once per week for three consecutive weeks. Wavelet used decompose laser Doppler signal frequency bands determined be associated with endothelial nitric oxide (0.008-0.02 Hz), neurogenic (0.02-0.05 myogenic (0.05-0.15 respiratory (0.15-0.4 and cardiac (0.4-2.0 Hz) mechanisms. results showed that coefficients variation power each band at baseline are smaller than or maximal ratio (P<0.05). Myogenic highest among five bands. An increase a decrease response reproduced Our suggests wavelet an effective method overcome
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