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IEE Proceedings A - Physical Science, Measurement and Instrumentation, Management and Education - Reviews

Issue 9 • Date December 1982

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Displaying Results 1 - 11 of 11
  • Biomedical engineering: systems and signal analysis

    Publication Year: 1982, Page(s):637 - 638
    IEEE is not the copyright holder of this material | PDF file iconPDF (279 KB)
    Freely Available from IEEE
  • Automatic control of blood pressure by drug infusion

    Publication Year: 1982, Page(s):639 - 645
    Cited by:  Papers (27)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1231 KB)

    Automatic control of arterial blood pressure by infusing the drug sodium nitroprusside is used for the treatment of elevated blood pressure after open-heart surgery at the Cardiac Surgical Intensive Care Unit of the University of Alabama Hospital. Controller design was based on investigations of the dynamics of the physiological responses of patients to nitroprusside infusion. A nonlinear PID digi... View full abstract»

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  • Modelling of the human vasomotor control system and its application to the investigation of arterial disease

    Publication Year: 1982, Page(s):646 - 650
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (759 KB)

    A control systems approach has been made to the investigation of the peripheral vasomotor control system. The thermal vasomotor control of digital bloodflow has been investigated in 46 subjects. Fourteen were controls, 26 were suffering from Raynaud's phenomenon and the rest had suspected malfunctions of the sympathetic nervous system. To assess the frequency response of the system a square-wave t... View full abstract»

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  • Extraction and characterisation of underlying velocity waveforms in poststenotic flow

    Publication Year: 1982, Page(s):651 - 662
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1463 KB)

    The problem of extracting and characterising underlying velocity waveforms in poststenotic flow is examined using a set of hot-film anemometer measurements in the descending thoracic aorta of a dog. The question of separating turbulence from the underlying waveform is studied by applying ensemble averaging and lowpass filtering methods. Results conclusively demonstrate that lowpass filtering is in... View full abstract»

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  • Short-time-series spectral analysis of biomedical data

    Publication Year: 1982, Page(s):663 - 672
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1126 KB)

    In the paper a review is given of modern parametric spectral analysis methods based on difference-equation models, in contrast with classical spectral analysis based on Fourier transform approaches. The algorithms discussed are based on an autoregressive structure as this leads to simple, efficient estimators. To provide fast algorithms, recursion in model order is introduced, while a lattice-filt... View full abstract»

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  • Spectral analysis and the interference EMG

    Publication Year: 1982, Page(s):673 - 678
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (750 KB)

    A comparison between the features observable in the spectrum of the interference EMG and in the spectrum of the turning points of the interference EMG is made. Explanations of these features are presented, and the two methods are compared. In particular, evidence is presented which indicates that it is easier to infer the shapes of the action potentials from the turning-points spectrum, provided t... View full abstract»

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  • Use of Phase Spectral Information in Assessment of Frequency Contents of ECG Waveforms

    Publication Year: 1982, Page(s):679 - 683
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (569 KB)

    The electrocardiogram of a healthy subject consists of three waveforms which reflect electrical activity of the myocardium, the P-wave, the QRS-complex and T-wave. An important feature of these waveforms is their frequency content. A practical recorded waveform comprises both a random component (noise and hum) and a deterministic component (the signal). A recently introduced method for the assessm... View full abstract»

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  • Signal processing for recovery of cardiac conducting system activity

    Publication Year: 1982, Page(s):684 - 692
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1181 KB)

    The muscular activity of the heart is co-ordinated and controlled by small electrical signals flowing in the specialised cardiac conducting system. Information about these signals, and hence about the integrity of the conducting system, is of increasing diagnostic value. The paper describes hardware and software which have been developed for detecting and processing conducting system activity. Sig... View full abstract»

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  • Exploratory pattern-analysis study of a multifocal measles epidemic

    Publication Year: 1982, Page(s):693 - 701
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1180 KB)

    As a preliminary to forecasting and to the design of epidemiological control measures, the features of weekly case occurrence data in 232 towns during a multifocal epidemic of measles in the state of Rio Grande do Sul (Brazil) have been investigated using a signal-processing approach. Data from 153 outbreaks in the period 1971¿¿79 were examined. Evidence was found of a consistent microstructure in... View full abstract»

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  • The sheffield respiration analysis system

    Publication Year: 1982, Page(s):702 - 706
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (702 KB)

    The paper describes a computerised system for analysing the respiration and the instantaneous heart rate from long-term recordings of respiration and ECG. The data are analysed as they are replayed at up to 64 times the real time. The respiratory signal is obtained using thoracic wall movement sensors or impendence pneumography. The factor used to quantitate the respiration is the breath-to-breath... View full abstract»

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  • Systems model of renal dialysis Formulation, validation identification

    Publication Year: 1982, Page(s):707 - 716
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1312 KB)

    A mathematical model of the human renal and associated subsystems, developed as part of a systems approach to the management of renal dialysis patients, is described. The results of a sequence of parameter estimation procedures, together with associated identifiability analysis, are presented. These were conducted both to determine unknown parameters in patients and as part of an extensive validat... View full abstract»

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