Signal acquisition, modeling and analysis of the pulmonary circulation system.

Abstract

by Ye Jian.Abstract in English and Chinese.Thesis (M.Phil.)--Chinese University of Hong Kong, 1993.Includes bibliographical references (leaves [140-147]).ABSTRACT --- p.iACKNOWLEDGEMENTS --- p.vLIST OF ABBREVIATIONS --- p.viTABLE OF CONTENTSChapter CHAPTER 1 --- IntroductionChapter 1.1 --- What is the EBI technique --- p.1-1Chapter 1.2 --- Applications of the EBI technique --- p.1-2Chapter 1.3 --- The electrical impedance rheopneumography-an overview --- p.1-4Chapter 1.4 --- Goal of the work --- p.1-6Chapter 1.5 --- Main contributions of the work --- p.1-9Chapter 1.6 --- Organization of the thesis --- p.1-9Chapter CHAPTER 2 --- Principles of the EBI technique and physiological background of the rheopneumogramChapter 2.1 --- Tissue impedance and origins of impedance change --- p.2-1Chapter 2.1.1 --- Impedance of living organs --- p.2-1Chapter 2.1.2 --- Origins of impedance change --- p.2-2Chapter 2.2 --- The data acquisition system (DAS) --- p.2-3Chapter 2.2.1 --- Impedance detector --- p.2-3Chapter 2.2.2 --- Constant current source and safety consideration --- p.2-4Chapter 2.2.3 --- Computer interface --- p.2-5Chapter 2.3 --- Electrode systems --- p.2-6Chapter 2.3.1 --- Two-/four-electrode systems --- p.2-6Chapter 2.3.2 --- Geselowitz lead field theory --- p.2-6Chapter 2.3.3 --- Comparisons between the two-/four-electrode systems --- p.2-7Chapter 2.4 --- The human cardiovascular system --- p.2-8Chapter 2.4.1 --- System operation --- p.2-8Chapter 2.4.2 --- Pulmonary hemodynamics --- p.2-9Chapter 2.5 --- Physiological background of EIR waveform --- p.2-12Chapter 2.6 --- EIR wave morphology and pathological factors --- p.2-13Chapter 2.6.1 --- Variations in the a-wave --- p.2-13Chapter 2.6.2 --- Variations in the Z-wave --- p.2-14Chapter 2.6.3 --- Variations in the C-wave --- p.2-14Chapter CHAPTER 3 --- THE COMPOSITION OF IMPEDANCE SIGNALChapter 3.1 --- Introduction --- p.3-1Chapter 3.1.1 --- Origins of the TIS --- p.3-1Chapter 3.1.2 --- EIR measurement and electrode position --- p.3-2Chapter 3.1.3 --- Optimal EIR measurement --- p.3-3Chapter 3.2 --- Current path in an inhomogeneous medium --- p.3-4Chapter 3.3 --- Numerical model --- p.3-5Chapter 3.3.1 --- 2D Model --- p.3-5Chapter 3.3.2 --- Tissue resistivity --- p.3-6Chapter 3.4 --- Calculation of the potential distribution --- p.3-7Chapter 3.5 --- Results --- p.3-9Chapter 3.5.1 --- Computer simulations --- p.3-9Chapter 3.5.2 --- Experimental results --- p.3-13Chapter 3.6 --- Discussions --- p.3-14Chapter 3.7 --- Conclusion --- p.3-16Chapter 3.8 --- Note on publications --- p.3-17Chapter CHAPTER 4 --- ON-LINE RESPIRATORY ARTEFACT REMOVAL VIA ADAPTIVE TECHNIQUEChapter 4.1 --- Introduction --- p.4-1Chapter 4.2 --- Analysis of the TIS --- p.4-3Chapter 4.3 --- Modified adaptive noise canceller --- p.4-7Chapter 4.3.1 --- Principle of the ANC method --- p.4-8Chapter 4.3.2 --- LMS algorithm --- p.4-8Chapter 4.3.3 --- MANC method --- p.4-9Chapter 4.3.4 --- Results --- p.4-10Chapter 4.4 --- Adaptive moving averager --- p.4-15Chapter 4.4.1 --- Modified moving averager --- p.4-15Chapter 4.4.2 --- Respiratory artefact elimination with adaptive MMA --- p.4-16Chapter 4.4.3 --- Performance of the adaptive MMA filter --- p.4-16Chapter 4.4.4 --- Results --- p.4-18Chapter 4.5 --- Adaptive FIR filter Design --- p.4-22Chapter 4.5.1 --- Introduction --- p.4-22Chapter 4.5.2 --- Adaptive FIR filter --- p.4-23Chapter 4.5.3 --- Results and discussions --- p.4-24Chapter 4.6 --- Simultaneously monitoring respiratory and pulmonary circulation- An application of TIS --- p.4-30Chapter 4.7 --- Comparisons of the proposed filter schemes --- p.4-33Chapter 4.7.1 --- Performance of the filters --- p.4-33Chapter 4.7.2 --- Computational complexity and reduced schemes --- p.4-34Chapter 4.8 --- Conclusions --- p.4-37Chapter 4.9 --- Notes on publications --- p.4-37Chapter CHAPTER 5 --- MODELING ANALYSIS OF THE RHEOPNEUMOGRAMChapter 5.1 --- Introduction --- p.5-1Chapter 5.2 --- Pulmonary circulation modeling --- p.5-2Chapter 5.3 --- Model deduction --- p.5-4Chapter 5.3.1 --- Pressure-flow in arteries and veins --- p.5-4Chapter 5.3.2 --- The two-chamber model and the EIR model --- p.5-5Chapter 5.4 --- Parameter estimation --- p.5-8Chapter 5.4.1 --- The fitting function and the parameter equations --- p.5-8Chapter 5.4.2 --- Curve fitting --- p.5-10Chapter 5.4.3 --- Solution of the parameter equations --- p.5-11Chapter 5.5 --- Study of the model parameter sensitivity --- p.5-12Chapter 5.6 --- Results --- p.5-13Chapter 5.7 --- Conclusion --- p.5-17Chapter 5.8 --- Notes on publications --- p.5-17Chapter CHAPTER 6 --- ANIMAL EXPERIMENTS AND CLINICAL OBSERVATIONSChapter 6.1 --- Introduction --- p.6-1Chapter 6.2 --- Animal experiments --- p.6-2Chapter 6.2.1 --- Methods --- p.6-2Chapter 6.2.2 --- Occlusion of the right pulmonary arterial blood flow --- p.6-3Chapter 6.2.3 --- Reflection waves in rheopneumogram --- p.6-4Chapter 6.3 --- Clinical observations --- p.6-4Chapter 6.3.1 --- Mitral valve stenosis --- p.6-5Chapter 6.3.2 --- Obstructive emphysema --- p.6-7Chapter 6.4 --- Conclusion remarks --- p.6-8Chapter 6.5 --- Notes on publications --- p.6-9Chapter CHAPTER 7 --- RECAPITULATION AND TOPICS FOR FUTURE INVESTIGATIONChapter 7.1 --- Recapitulation --- p.7-1Chapter 7.2 --- Conclusions --- p.7-3Chapter 7.3 --- Topics for future investigation --- p.7-4Chapter 7.4 --- Applications of the EIR technique --- p.7-5REFERENCESAPPENDICESChapter A. --- A circuit diagram of the four-electrode system --- p.A-lChapter B. --- NISA/EMAG (A SOFTWARE PACKAGE OF FEM) --- p.A-2Chapter C. --- LMS algorithm --- p.A-3Chapter D. --- Curve fitting --- p.A-5Chapter E. --- List of publications --- p.A-