by Ling Chao Dong. / Publication date from spine. / Thesis (M.Phil.)--Chinese University of Hong Kong, 1995. / Includes bibliographical references (leaves [102]-107). / ABSTRACT --- p.iii / ACKNOWLEDGEMENTS --- p.v / LIST OF ABBREVIATIONS --- p.vi / Chapter CHAPTER 1 --- Introduction / Chapter 1.1 --- Physiological measurement by EBI technique --- p.1 -1 / Chapter 1.2 --- Application of the EBI technique in the human thorax --- p.1 -2 / Chapter 1.3 --- Development in EIR measurement-An overview --- p.1 -4 / Chapter 1.4 --- Project objective --- p.1-7 / Chapter 1.5 --- Problems to be solved for EBI data acquisition system --- p.1-8 / Chapter 1.6 --- Main contribution of this project --- p.1 -8 / Chapter 1.7 --- Thesis outline --- p.1-9 / Chapter CHAPTER 2 --- Principles of The EBI Technique for Cardiopulmonary System / Chapter 2.1 --- The data acquisition system (DAS) --- p.2-1 / Chapter 2.1.1 --- Impedance measurement --- p.2-1 / Chapter 2.1.2 --- Data extraction and collection --- p.2-3 / Chapter 2.2 --- Constant current source --- p.2-3 / Chapter 2.3 --- Single-source multi-channel EBI controller --- p.2-5 / Chapter 2.4 --- Computer interface --- p.2-6 / Chapter 2.5 --- Tissue impedance and impedance change --- p.2-7 / Chapter 2.5.1 --- Impedance of living tissue --- p.2-7 / Chapter 2.5.2 --- Origins of impedance change --- p.2-8 / Chapter 2.6 --- Cardiovascular physiology in human body --- p.2-10 / Chapter 2.6.1 --- Structure and function of the circulatory system --- p.2-10 / Chapter 2.6.2 --- Principles of hemodynamics in pulmonary circulation --- p.2-12 / Chapter 2.7 --- Clinical application of the EIR waveform --- p.2-15 / Chapter 2.7.1 --- Physiological basis --- p.2-15 / Chapter 2.7.2 --- Clinical application --- p.2-16 / Chapter CHAPTER 3 --- The Composition of EIR Signal / Chapter 3.1 --- Introduction --- p.3-1 / Chapter 3.1.1 --- The impedance change in the transthoracic section --- p.3-1 / Chapter 3.1.2 --- Origins of impedance change in pulmonary circulation --- p.3-2 / Chapter 3.2 --- Examination of contribution of impedance sources via electrolytic tank model --- p.3-3 / Chapter 3.2.1 --- Electrolytic tank set-up --- p.3-3 / Chapter 3.2.2 --- Electrolytic tank procedure --- p.3-4 / Chapter 3.2.3 --- Experimental results and discussion --- p.3-5 / Chapter 3.3 --- The interference behaviour via computer simulation --- p.3-8 / Chapter 3.3.1 --- 2D numerical model --- p.3-9 / Chapter 3.3.2 --- Computer simulation --- p.3-10 / Chapter 3.3.3 --- Results and discussion --- p.3-11 / Chapter 3.4 --- The variation of EIR waveform with electrode size --- p.3-12 / Chapter 3.4.1 --- An electronic model --- p.3-12 / Chapter 3.4.2 --- A simulated source of impedance change in pulmonary circuit --- p.3-16 / Chapter 3.4.3 --- Variation of EIR waveform via computer simulation --- p.3-18 / Chapter 3.4.4 --- Computer simulation results and discussion --- p.3-20 / Chapter 3.5 --- Discussions --- p.3-20 / Chapter 3.6 --- Conclusion --- p.3-21 / Chapter CHAPTER 4 --- A Guard Electrode System to Improve the EIR Measurement / Chapter 4.1 --- Introduction --- p.4-1 / Chapter 4.2 --- Normal electrode system --- p.4-2 / Chapter 4.2.1 --- Normal electrode configuration --- p.4-2 / Chapter 4.2.2 --- Current-guarding technique for the constant-voltage system --- p.4-2 / Chapter 4.3 --- Electric field guarding --- p.4-3 / Chapter 4.4 --- Methods of study --- p.4-4 / Chapter 4.5 --- Results --- p.4-5 / Chapter 4.4.1 --- The change of electric field distribution with guarding --- p.4-5 / Chapter 4.4.2 --- Result from electrolytic tank simulation --- p.4-5 / Chapter 4.4.3 --- Variation of EIR waveform with/without guarding in human thorax --- p.4-6 / Chapter 4.5 --- Discussions and conclusion --- p.4-6 / Chapter CHAPTER 5 --- Human Measurements / Chapter 5.1 --- Introduction --- p.5-1 / Chapter 5.2 --- Variation of EIR waveform from normal human body --- p.5-2 / Chapter 5.2.1 --- Methods --- p.5_2 / Chapter 5.2.2 --- The variation of EIR waveform with electrode position and size --- p.5-3 / Chapter 5.3 --- Clinical observation --- p.5-4 / Chapter 5.3.1 --- What is PTMV --- p.5-4 / Chapter 5.3.2 --- Observing EIR waveform during the PTMV operation --- p.5-5 / Chapter 5.3.3 --- Results and discussion --- p.5-5 / Chapter 5.4 --- EIR for use in PTMV operation --- p.5-7 / Chapter 5.4.1 --- Conventional diagnostic and monitoring methods for PTMV --- p.5-7 / Chapter 5.4.2 --- The characteristic of EIR waveform with mitral stenosis --- p.5-7 / Chapter 5.4.3 --- Use of EIR as an assessing/monitoring tool for PTMV operation --- p.5-8 / Chapter 5.4.4 --- Methodology in this study --- p.5-8 / Chapter 5.4.5 --- Result and discussion --- p.5-9 / Chapter 5.5 --- Conclusion --- p.5-10 / Chapter CHAPTER 6 --- Recapitulation and Topic for Future Investigation / Chapter 6.1 --- Recapitulation --- p.6-1 / Chapter 6.2 --- Topics for future investigation --- p.6-3 / Chapter 6.2.1 --- Improvement to the DAS --- p.6-3 / Chapter 6.2.1 --- Data analysis for PTMV --- p.6-3 / REFERENCES --- p.R-1 / APPENDICES / Chapter A. --- Circuit diagram of electrical bio-impedance source simulator --- p.A-l / Chapter B. --- Circuit diagram of the electrical bio-impedance detector --- p.A-2 / Chapter C. --- Circuit diagram of multi-channel controller for multi-EBI detection --- p.A-3 / Chapter D. --- List of publications --- p.A-4

by Leung Chung-chu. / Thesis (M.Phil.)--Chinese University of Hong Kong, 1993. / Includes bibliographical references (leaves 101-107). / ABSTRACT --- p.i / ACKNOWLEDGEMENTS --- p.iii / LIST OF ABBREVIATIONS --- p.iv / LIST OF PUBLICATIONS --- p.v / TABLE OF CONTENTS --- p.vi / Chapter CHAPTER 1 --- Introduction / Chapter 1.1 --- Background of the Rheopneumograph --- p.1 / Chapter 1.2 --- The Electrical Bio-impedance (EBI) technique used in Rheopneumography --- p.2 / Chapter 1.3 --- Problems with analysis of Rheopneumograph --- p.6 / Chapter 1.4 --- The EBI measurement unit --- p.8 / Chapter 1.5 --- Data analysis in Rheopneumography and the electrode design --- p.8 / Chapter 1.6 --- Modelling analysis in Rheopneumography --- p.9 / Chapter 1.7 --- Thesis outline --- p.10 / Chapter CHAPTER 2 --- Improvement to the impedance measurement system / Chapter 2.1 --- Introduction --- p.13 / Chapter 2.1.1 --- The Coherent Detection method in EBI signal --- p.13 / Chapter 2.1.2 --- To discuss the problem in Coherent Detection method --- p.16 / Chapter 2.1.3 --- To discuss the problem in Costas Receiver method --- p.16 / Chapter 2.2 --- The concept of the Amplitude Modulation Receiver --- p.17 / Chapter 2.3 --- EBI measurement unit design using AM receiver technique --- p.18 / Chapter 2.3.1 --- The C-Y receiver --- p.18 / Chapter 2.3.2 --- A simple DC offset adjust circuit --- p.23 / Chapter 2.3.3 --- 555KHz local oscillator and constant current source --- p.25 / Chapter 2.3.4 --- Selection of the low pass filter --- p.29 / Chapter 2.4 --- The characteristic of the whole circuit and performance --- p.32 / Chapter 2.5 --- Discussion --- p.36 / Chapter CHAPTER 3 --- Data analysis in Rheopneumogram / Chapter 3.1 --- Introduction --- p.38 / Chapter 3.2 --- The 5-10 electrode array method applied in Thorax Montage --- p.39 / Chapter 3.2.1 --- The definition of the 5-10 electrode array method --- p.39 / Chapter 3.2.2 --- The advantage of the 5-10 electrode array method --- p.41 / Chapter 3.3 --- Signal analysis in subject-to-subject comparison --- p.41 / Chapter 3.3.1 --- The relationship between the ECG and Rheopneumogram --- p.45 / Chapter 3.4 --- Identification of the best electrode location in Rheopneumograph using Pump-jet model --- p.51 / Chapter 3.4.1 --- The fluid mechanical model device (Pump-jet model) --- p.51 / Chapter 3.4.2 --- Result and discussion --- p.57 / Chapter 3.5 --- Electrical conductivity studies in Silicon fluid-Graphite composites applied in EBI electrode array system --- p.62 / Chapter 3.5.1 --- Experimental procedure and results --- p.63 / Chapter 3.6 --- Discussion --- p.73 / Chapter CHAPTER 4 --- Model analysis for the Impedance Rheopneumogram / Chapter 4.1 --- Introduction --- p.76 / Chapter 4.2 --- Blood flow phenomenon study in Rheopneumogram using Pipeline model --- p.78 / Chapter 4.2.1 --- Model derivation --- p.79 / Chapter 4.2.2 --- Result and discussion --- p.86 / Chapter 4.3 --- Blood velocity study in Rheopneumogram using Pump-jet model --- p.94 / Chapter 4.3.1 --- Result and discussion --- p.94 / Chapter 4.4 --- Conclusion --- p.96 / Chapter CHAPTER 5 --- General discussion and Conclusion --- p.97 / Chapter CHAPTER 6 --- Reference --- p.101 / APPENDICES / Chapter I --- Measurement method in the study --- p.107 / Chapter II --- The simplification of an equation in pump-jet model --- p.109 / Chapter III --- The simplification of an equation in pipeline model --- p.111 / Chapter IV --- Impedance relation between body and electrode --- p.112 / Chapter V --- The procedure of the curve fitting --- p.113