ISSN:0309-1902    

DOI:10.3109/03091909609008996

出版商:Taylor&Francis    

年代:1996

数据来源: Taylor

ISSN:0309-1902    

DOI:10.3109/03091909609008997

出版商:Taylor&Francis    

年代:1996

数据来源: Taylor

摘要:

Hypoglycaemia is the most common complication affecting people with Type 1 insulin dependent diabetes mellitus. Its onset is characterized by symptoms which include sweating, tremor, palpitations, loss of concentration and tiredness. As part of a research project to investigate the mechanisms of hypoglycaemia we have developed an ambulatory system to monitor and. record pulsatile changes in blood flow, pulse internal, body temperature and skin impedance. The system uses a pocket computer (Atari Portfolio) to collect and store the data on a memory card. The analogue system consists of two thermocouples, an infrared photoplethysmograph and skin impedance monitoring circuit. To conserve power the system is programmed to make measurements for 2 min every 10 min; using this regimen over 16 h of data can be stored. Data collected during a spontaneous overnight hypoglycaemic episode are presented and also a comparison between continuous and intermittent data collection during a period of induced hypoglycaemia. The system is being used to investigate the physiological responses to hypoglycaemia but could easily be adapted for monitoring other physiological signals.

ISSN:0309-1902    

DOI:10.3109/03091909609008998

出版商:Taylor&Francis    

年代:1996

数据来源: Taylor

摘要:

A paperless electronic spirometer/diary instrument has been employed in a home monitoring programme for lung and heart-lung transplant patients at the University of Minnesota. The monitoring programme is part of a long term study to develop a system which will detect the earliest signs of developing rejection or infection in the transplanted organs. It is based on patient daily self-measurements of standard spirometry, vital signs, and symptoms recorded at home and transmitted weekly to the study data center over the telephone using a modem built into the instrument. This report summarizes adherence behaviour for 41 subjects enrolled in the study over a 12 month period. The number of subjects from whom home data has been received each week was used to measure adherence at the subject level. The number of records received each week measured adherence at the daily recording level. A data record consists of a daily set of spirometry, vital signs, and symptom values from a given subject. Approximately 82% of subjects transmitted records each week, over the 52 week review period. There was an average of 43 records received each week from each subject. Transmitted records had missing vital sign or symptom items in less than 2 % of cases; spirometry data was always present. This evaluation showed that lung transplant recipients are willing and able to use a home-monitoring instrument, and that basic spirometry, data entry, and data transmission can be performed satisfaction.

ISSN:0309-1902    

DOI:10.3109/03091909609008999

出版商:Taylor&Francis    

年代:1996

数据来源: Taylor

摘要:

Principal component analysis has long been used for a variety of signal processing applications, including signal compression. Neural network implementations of principal component analysis provide a means for unsupervised feature discovery and dimension reduction. In this paper, we describe a method for the compression of ECG data using principal component analysis. Hebbian neural networks were used for principal components computation. A variety of examples of normal and pathological ECGs obtained from the MIT ECG database demonstrate that the proposed method can provide compression ratio up to 30 with PRD% less than 5%.

ISSN:0309-1902    

DOI:10.3109/03091909609009000

出版商:Taylor&Francis    

年代:1996

数据来源: Taylor

摘要:

The behaviour of the blood flow passing through artificial heart valves in aortic position is numerically simulated by discretizing the Navier-Stokes equations for viscous incompressible flow through the finite element method. Three different artificial valves, Starr-Edwards, St Jude and disc valves, are modelled by using the finite element method as well as the Navier—Stokes equations for viscous incompressible flow. The blood flow behaviour is characterized by discretizing both planar and axisymmetric domains of the valve devices. The streamlines as well as the velocity distributions are studied and compared. Likewise, the pressure patterns are analysed and compared. Some numerical examples of the three valves are presented and discussed herein.

ISSN:0309-1902    

DOI:10.3109/03091909609009001

出版商:Taylor&Francis    

年代:1996

数据来源: Taylor

ISSN:0309-1902    

DOI:10.3109/03091909609009002

出版商:Taylor&Francis    

年代:1996

数据来源: Taylor

ISSN:0309-1902    

DOI:10.3109/03091909609009003

出版商:Taylor&Francis    

年代:1996

数据来源: Taylor

摘要:

Bioelectromagnetism: Principles and Applications of Bioelectric and Biomagnetic Fields:By J. Malmivuo and R. Plonsey. Oxford University Press (Oxford and New York), pp. 482. Price 275. ISBN 019 5058232.Magnetic Resonance Imaging: Theory and PracticeBy M. T. Vlaardingerbroek and J. A. den Boer. Springer-Verlag (Berlin, Heidelberg, 1996), pp. 349. Price DM 128, ISBN 3-540-60080-9.

ISSN:0309-1902    

DOI:10.3109/03091909609009004

出版商:Taylor&Francis    

年代:1996

数据来源: Taylor

ISSN:0309-1902    

DOI:10.3109/03091909609009005

出版商:Taylor&Francis    

年代:1996

数据来源: Taylor