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Estimation of mean arterial pressure from the oscillometric cuff pressure: comparison of different techniques

Medical & Biological Engineering & Computing volume 49, pages 33–39 (2011)Cite this article

Abstract

Mean arterial pressure (MAP) is determined in most automated oscillometric blood pressure devices, but its derivation has been little studied. In this research, different techniques were studied and compared with the auscultatory technique. Auscultatory systolic and diastolic blood pressure (SBP and DBP) were obtained in 55 healthy subjects by two trained observers, and auscultatory MAP was estimated. Automated MAP was determined by six techniques from oscillometric cuff pressures recorded digitally and simultaneously during manual measurement. MAPs were derived from the peak and foot of the largest oscillometric pulse, and from time domain curves fitted to the sequence of oscillometric pulse amplitudes (4th order and three versions of the 6th order polynomial curve). The agreement between automated and auscultatory MAPs was assessed. Compared with the auscultatory MAP, the automated MAP from the baseline cuff pressure at the peak of the 6th order polynomial curve had the smallest mean paired difference (−1.0 mmHg), and smallest standard deviation of paired differences (3.7 mmHg). These values from the peak of the largest oscillometric pulse were −1.3 and 6.2 mmHg, respectively. Determining MAP from a model of the oscillometric pulse waveform had the smallest differences from the manual auscultatory technique.

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Acknowledgments

Dr Dingchang Zheng is funded by the Engineering and Physical Sciences Research Council (EPSRC).

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Affiliations

  1. Regional Medical Physics Department, Freeman Hospital, Newcastle University, Newcastle upon Tyne, UK

    Dingchang Zheng & Alan Murray

  2. Department of Medical Physics, Royal Infirmary of Edinburgh, Edinburgh, UK

    John N. Amoore

  3. Physikalisch-Technische Bundesanstalt, Abbestrasse 2-12, 10587, Berlin, Germany

    Stephan Mieke

  4. Cardiovascular Physics and Engineering Research Group, Regional Medical Physics Department, Freeman Hospital, Newcastle University, Newcastle upon Tyne, NE7 7DN, UK

    Dingchang Zheng

Authors
  1. Dingchang Zheng
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  2. John N. Amoore
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  3. Stephan Mieke
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  4. Alan Murray
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Correspondence to Dingchang Zheng.

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Zheng, D., Amoore, J.N., Mieke, S. et al. Estimation of mean arterial pressure from the oscillometric cuff pressure: comparison of different techniques. Med Biol Eng Comput 49, 33–39 (2011). https://doi.org/10.1007/s11517-010-0694-y

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  • DOI: https://doi.org/10.1007/s11517-010-0694-y

Keywords

  • Blood pressure
  • Cuff pressure
  • Mean arterial pressure (MAP)
  • Non-invasive blood pressure (NIBP)
  • Oscillometric pulse