Separation of Arterial Pressure into Solitary Waves and Windkessel Flow
نویسندگان
چکیده
A simplified model of arterial blood pressure intended for use in model-based signal processing applications is presented. The main idea is to decompose the pressure into two components: a travelling wave describes the fast propagation phenomena predominating during the systolic phase and a windkessel flow represents the slow phenomena during the diastolic phase. Instead of decomposing the blood pressure pulse into a linear superposition of forward and backward harmonic waves, as in the linear wave theory, a nonlinear superposition of travelling waves matched to a reduced physical model of the pressure, is proposed. Very satisfactory experimental results are obtained by using forward waves, the Nsoliton solutions of a Korteweg-de Vries equation in conjunction with a two-element windkessel model. The parameter identifiability in the practically important 3soliton case is also studied. The proposed approach is briefly compared with the linear one and its possible clinical relevance is discussed. Copyright c ©2006 IFAC
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Separation of arterial pressure into a nonlinear superposition of solitary waves and a windkessel flow
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