摘要:

The chest wall comprising both rib cage and abdomen moves during breathing, and when suitably calibrated this motion can be used to monitor pulmonary ventilation without the need for face-masks or mouthpieces. Such non-invasive methods of studying breathing are likely to become more widely used in the future, especially in the investigation of respiratory control and sleep-disordered breathing. This review describes the physiological basis of these measurements and examines the practical and theoretical limitations of calibration techniques based on the two degrees-of-freedom model of chest-wall motion.

ISSN:0309-1902    

DOI:10.3109/03091908309032586

出版商:Taylor&Francis    

年代:1983

数据来源: Taylor

摘要:

A non-invasive system for monitoring chest and abdominal motion is described. The system is based on the use of two microwave interferometers. A linear relationship with tidal volume can be obtained using an isovolume technique for calibration. Although the system is not an improvement on existing equipment, it is simpler and cheaper and well suited to rehabilitation work.

ISSN:0309-1902    

DOI:10.3109/03091908309032587

出版商:Taylor&Francis    

年代:1983

数据来源: Taylor

摘要:

In Liverpool Health Authority a computer inventory of over 6000 items of medical equipment is used as an aid to servicing and management. Extracts from the inventory are used to guide work in several different servicing units and the cross-referencing facility is employed to provide lists of equipment by category (for example, manufacturer, hospital, department, cost band, age etc.).After four years' experience of this scheme we conclude that the costs are justified by the benefits to the equipment servicing programmes and to the management of equipment. However, the information made available for other purposes within the health authority (administration, supplies, finance etc) has not been made use of to the extent that the whole cost could be justified as a management service. We have also found that the quality of inventory records and usage are improved where technicians can use the computer directly, and we find that medical physics technicians quickly come to understand such systems thereby minimizing support costs.

ISSN:0309-1902    

DOI:10.3109/03091908309032588

出版商:Taylor&Francis    

年代:1983

数据来源: Taylor

摘要:

A recent edition of‘Health Equipment Information’(No. 108, March 1983) carries evaluation reports on a further four ECG monitors: the Cardiac Recorders CR5 and CR7, the Datamedix Statscope 1, and the Physio-Control Lifepak 6. Detailed technical and clinical evaluations are presented on these models, together with summaries of earlier reports for purposes of comparison. Orders forlHEV No. 108 (non-NHS employees) to the DHSS Leaflets Unit, PO Box 21, Stanmore, Middlesex HA1 1AY, UK; the price is£3-00/copy. NHS employees can obtain a copy free through their Administrator.

ISSN:0309-1902    

DOI:10.3109/03091908309032589

出版商:Taylor&Francis    

年代:1983

数据来源: Taylor

ISSN:0309-1902    

DOI:10.3109/03091908309032590

出版商:Taylor&Francis    

年代:1983

数据来源: Taylor

摘要:

A system for performing real-time analysis of cardiac action potentials has been developed using a microcomputer based on the Motorola 6800 central processor. Transmembrane potentials obtained using standard microelectrodes were digitized to 8 bits at 80 ms intervals, stored in cyclic memory buffer from which they could be selected for analysis, converted back to analogue form and displayed on an oscilloscope in real time. For each action potential, amplitude, the maximum rate of change of potential and the action potential duration at 50% repolarization and 100% repolarization were measured. In addition, conduction time (taken as the interval between the stimulus artefact and the action potential) was measured. All data were stored in memory and later printed, together with the time at which the recording was made. The system was designed for analysis of action potentials recorded using floating microelectrodes. The computer was controlled by three remote switches and a potentiometer, positioned close to the muscle bath. The program was written in Motorola 6800 assembly language and stored in erasable programmable read-only memory.

ISSN:0309-1902    

DOI:10.3109/03091908309032591

出版商:Taylor&Francis    

年代:1983

数据来源: Taylor

摘要:

The condition of critically ill patients may change rapidly. The consequent alterations in drug therapy may result from the advice of a number of specialists, some of whom may not be skilled in the problems of adverse drug interactions. As a result, screening for drug contra-indications by someone with the necessary experience often occurs after the patient has already received the drug. By providing information on drug interactions on an inexpensive microcomputer, the necessary screening for adverse interactions can take place before the administration of the drug. A software package, written in FOR TRAN, which can handle the storage and retrieval of this type of information, is described. The system can assess up to 18 drugs simultaneously, from a data-base comprising the 102 stock drugs held by the Intensive Therapy Unit at Rotherham District General Hospital, together with 26 other drugs, which could interact with the stock drugs to produce serious or possibly fatal consequences. It also differentiates between therapeutic interactions and chemical or physical incompatibilities.

ISSN:0309-1902    

DOI:10.3109/03091908309032592

出版商:Taylor&Francis    

年代:1983

数据来源: Taylor

摘要:

A microprocessor-based system devoted to ambulatory monitoring of heart-rate variability (HRV) is described. Mainly it measures R-R intervals after QRS detection and provides a real-time quantification of the HRV. The concept of derived successions and a suitable set of graphical summaries are used. The hardware is based on CMOS technology; the mobile part of the system is battery operated. The results are printed-out by the fixed part of the system, they can also be fed into a general-purpose computer. Other applications of the system are suggested.

ISSN:0309-1902    

DOI:10.3109/03091908309032593

出版商:Taylor&Francis    

年代:1983

数据来源: Taylor

ISSN:0309-1902    

DOI:10.3109/03091908309032594

出版商:Taylor&Francis    

年代:1983

数据来源: Taylor

摘要:

Hearing Science and Hearing Disorders Edited by M. E. Lutman and M. P. Haggard (Academic Press, Inc. [London] Ltd, London, 1983), pp. 338.£1500 and S28-0O. ISBN 0-12-460440-4.Denzil N. Brooks Withington Hospital, Manchester, UKSculptured Surfaces in Engineering and Medicine By J. P. Duncan and S. G. Mair (Cambridge University Press, Cambridge, UK, 1983), pp. 383. Hard cover£42-50. ISBN 0-521-23450-6.R. J. Minns A. D. Craxford Dryburn Hospital, Durham, UKUltrasound Annual 1982 Edited by Roger C. Sanders (Raven Press, New York, 1982). pp. 363. S59-52. ISBN 0-89004-861-4.D. O. Cosgrove Royal Mursilen Hospital, Sutton, UKElectrocardiographic Data Acquisition and Applications for Cardiac Dysrhythmia Monitoring (Association for the Advancement of Medical Instrumentation, Arlington, USA, 1983), pp. 27. $25-00, SI5-00 to AAMI members. ISBN 0-910275-19-X.Alan Murray Freeman Hospital, Newcastle upon Tyne, UKThe Impact of Computer Technology on Drug Information Edited by Per Manell and Sven G. Johansson (North-Holland Publishing Company, Amsterdam, The Netherlands and New York, USA, 1982), pp. 262. Dfl. 8000 and $37-25. ISBN 0-444-864512.Peter Jones The Royal Infirmary, Edinburgh, UKBiomechanics: Principles and Applications Edited by Rik Huiskes, Dick H. van Campen and Joost R. de Wijn (Martinus Nijhoff Publishers, The Hague, Boston, USA and London, 1982), pp. 458. Hard cover, Dfl. 15000 and S65O0. ISBN 90-247-3047-3. Part of Martinus Nijhoffs series‘Developments in Biomechanics’.E. J. Evans University College, Cardiff, UK Biomedical images and computers Edited by J. Sklansky and J.-C. Bisconte (Springer-Verlag, Berlin. FR Germany, 1982), pp.vii + 332. Soft cover DM49-50; USSf. 22-00 ISBN 3-540-11579-X.D. Nicholas Royal Marsden Hospital, Sutton, UK Proceedings AAMI 18th Annual Meeting, 1983 Orders to AAMI, 1901 North Fort Myer Drive, Suite 602, Arlington, Virginia 22209. USA.

ISSN:0309-1902    

DOI:10.3109/03091908309032595

出版商:Taylor&Francis    

年代:1983

数据来源: Taylor