Abstract
Fast analysis of long-term intra-arterial blood-pressure recordings can be approached in various ways. We describe a low cost system, consisting of a hybrid preprocessor and a minicomputer, which can either perform fast data reduction, producing simple statistical information to aid patient management, or be used as the basis of a more comprehensive signal processing facility for research purposes. The preprocessor saves computer time by detecting and measuring the systolic and diastolic points, thereby allowing recordings to be processed 25 times faster than they were recorded. Attention has been given to the special problems of calibration and artefact rejection. Data conversion accuracy was found to be within 2% on a typical recording. The system can run automatically if required to ease the task of routine blood-pressure tape processing.
Similar content being viewed by others
References
Francis, G. R. (1974) An improved systolic-diastolic pulse separator.Med. & Biol. Eng. 12, 105–108.
Goldberg, A. D. andRaftery, E. B. (1976) Patterns of blood pressure during chronic administration of postganglionic sympathetic blocking drugs for hypertension.Lancet 2, 1052–1054.
Klevenhagen, S. C. andStorey, P. (1978) Display stabilising circuit for systolic-diastolic blood pressure monitors.Med. & Biol. Eng. & Comput. 16, 65–67.
Littler, W. A., Honour, A. J., Sleight, P. andStott, F. D. (1972) Continuous recording of direct arterial pressure and electrocardiogram in unrestricted man.Brit. Med. J. 3, 76–78.
Littler, W. A., West, M. J., Honour, A. J. andSleight, P. (1978) The variability of arterial pressure.Amer. Heart J. 95, 180–186.
McGough, A. R. andMcDonald, R. D. (1968) Systolic-diastolic heart pressure monitor.Electron. Engineering 40, 673–677.
Miles, R. andGuz, A. (1976) Analysis of heart rate in physiological and clinical studies.Postgraduate Med. J. 52 (suppl. 7), 24–30.
Millar Craig, M. W., Hawes, D. W. C. andWhittington, J. (1978) New system for measuring ambulatory blood pressure in man,Med. & Biol. Eng. & Comput. 16, 727–731.
Mitchell, R. H., Ruff, S. C. andMurnaghan, G. A. (1978) Computer processing of long-term blood pressure and pulse rate variations.In ISAM '77 (proceedings of the 2nd International symposium on ambulatory monitoring), Academic Press, London, 195–199.
Murnaghan, G. A. (1976) Hypertension in pregnancy.Postgraduate Med. J. 52 (suppl. 7), 123–126.
Naylor, W. S. (1971) An analog preprocessor for use in monitoring arterial pressure.Biomed. Eng. 6, 77–80.
Sandman, A. M. andHill, D. W. (1974) An analogue preprocessor for the analysis of blood pressure.Med. & Biol. Eng. 12, 360–363.
Sayers, B. McA., Ellis, N. W. andGreen, H. L. (1978) Minimum and maximum requirements for physiological measurement: intra-arterial blood pressure—a pilot study report. Engineering in Medicine Laboratory, Imperial College, London.
Wertheimer, L. (1976) Studies in a hypertensive population.Postgrad. Med. J. 52, (suppl. 7), 114–117.
West, M. J. andSleight, P. (1976) Statistical analysis of the 24-hour blood pressure using pressure frequency histograms.Postgrad. Med. J. 52 (suppl. 7), 100–104.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Cashman, P.M.M., Stott, F.D. & Millar Craig, M.W. Hybrid system for fast data reduction of long-term blood-pressure recordings. Med. Biol. Eng. Comput. 17, 629–635 (1979). https://doi.org/10.1007/BF02440908
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF02440908