An analysis of frequency response for the blood flow of volume pulse in microcirculation.
In this paper, a frequency analysis for the microcirculation model is introduced to find new microcirculation parameters in the frequency domain. By using Bode Plot of transfer function, we found two characteristic parameters of the model: damping ratio xi and break frequency omega(n). By analyzing the variation of xi and omega(n), it enables us to have better understanding of different states of microcirculation. At low damping, 0<xi<1, the state of microcirculation will be better and better along with the increasing of the omega(n). At over damping, xi> or =1, the state of microcirculation will be worse and worse along with the descending of the omega(n). The results of experiments on 120 subjects are consistent with the analytical results of the model.
Wang
Y
Y
Biomedical Engineering Center, Beijing University of Technology, Beijing 100022, P.R. China.
Zhang
S
S
Yang
Y M
YM
Luo
Z C
ZC
Zhang
J H
JH
Zeng
Y J
YJ
D000704:Analysis of Variance; D001783:Blood Flow Velocity; D001794:Blood Pressure; D002320:Cardiovascular Physiological Phenomena; D006801:Humans; D008833:Microcirculation; D015233:Models, Statistical; D008962:Models, Theoretical; D010991:Plethysmography / Q000379:methods*; D011674:Pulse; D012039:Regional Blood Flow