Total views : 452

Comparative Analysis and Accuracy of a Devised Automated Non Invasive Blood Pressure Monitor Based on Oscillometric Method


  • Biomedical Engineering Department, Sir Syed University of Engineering and Technology, Karachi, Pakistan
  • College of Biomedical Engineering, Ziauddin University, Karachi, Pakistan


Objectives: This paper focuses on the evaluation of accuracy and reliability of previously designed oscillometric based Non Invasive Blood Pressure (NIBP) instrument by means of a comparative analysis with the standard cuff mercury sphygmomanometer based on auscultation. Methods/Statistical Analysis: Thirty healthy subjects between the ages of 18-23 were examined by successive application of both devices having identical cuffs and site of measurement. The analysis of means and bias values demonstrated that our designed oscillometric NIBP monitor under-read all blood pressure values compared to mercury manometer. Findings: The mean oscillometric NIBP readings (Systolic Blood Pressure (SBP) 119.65 ± 8.25, Diastolic Blood Pressure (DBP) 76.82 ± 6.12 and Mean Arterial Pressure (MAP) 91.1 ± 4.76) were significantly lower than its auscultatory counterpart (SBP 127.03 ± 8.7, DBP 81.4 ± 6.2 and MAP 96.6 ± 4.95). F-test showed that the devised prototype is precise and comparable to a reference mercury manometer. A p-value of <0.05 was recognized to be statistically considerable. Conclusively, the designed NIBP monitoring prototype exhibited a tendency to measure lower blood pressure values than the auscultatory sphygmomanometer; but both devices were well comparable. The difference found, was statistically significant but below the level of physiological significance. Application/Improvements: This oscillometric NIBP prototype may be used for training as well as learning objectives. Furthermore, this prototype can be improved by Arduino based microcontroller and kit in the future studies.


Auscultatory Method, Brachial Artery, Non Invasive Blood Pressure, Oscillometric Method, Sphygmomanometer

Full Text:

 |  (PDF views: 231)


  • Golub HL. Method and apparatus for non-invasive, cuffless, continuous blood pressure determination. Google Patents; 1999.
  • Sorvoja H, Ahonen R. Noninvasive blood pressure pulse detection and blood pressure determination. University of Oulu; 2006.
  • A global brief on hypertension: Silent killer, global public health crisis. World Health Organization; 2016.
  • Sharma DS. Blood pressure-a silent killer. International Journal of Scientific Research. 2016; 4(6).
  • Caro RG, Sher MH, Flaherty BP. Monitor for indicating a change in a patient’s blood pressure. Google Patents; 1998.
  • Johnson C, Kerr J. Automatic blood pressure monitors. A clinical evaluation of five models in adults. Anaesthesia.1985; 40(5):471–8.
  • Gordon DC, Brunot FA. Method and apparatus for continuously and non-invasively measuring the blood pressure of a patient. Google Patents; 1990.
  • Ogedegbe G, Pickering T. Principles and techniques of blood pressure measurement. Cardiology Clinics. 2010; 28(4):571–86.
  • Fuentes R, Bañuelos M. Digital blood pressure monitor.Journal of Applied Research and Technology. 2009; 2(03).
  • Flaherty BP, Sher MH, Caro RG. Rapid non-invasive blood pressure measuring device. Google Patents; 2003.
  • Ul Haque MZ, Ateeq IS, Hussain SM, Halai M, Shaikh MF, Hameed K. Real time monitoring and analysis of non invasive blood pressure using lab Windows/CVI 8.0. Northeast American Society of Engineering Education Conference: Engineering in the New Global Economy; 2009 Apr 3-4.Bridgeport, USA. 2009.
  • White WB, Anwar YA. Evaluation of the overall efficacy of the Omron office digital blood pressure HEM‐907 monitor in adults. Blood Pressure Monitoring. 2001; 6(2):107–10.
  • Pessenhofer H. Single cuff comparison of two methods for indirect measurement of arterial blood pressure: Standard auscultatory method versus automatic oscillometric method. Basic Research in Cardiology. 1986; 81:101–9.
  • Amadasun F, Isa J. A comparison of sphygmomanometric and scillometric methods of blood pressure measurements in adult in-patients. Nigerian Journal of Clinical Practice.2006; 8(2):86–9.
  • Silas J, Barker A, Ramsay L. Clinical evaluation of Dinamap 845 automated blood pressure recorder. British Heart Journal. 1980; 43(2):202–5.
  • Weaver MG, Park MK, Lee D-H. Differences in blood pressure levels obtained by auscultatory and oscillometric methods. American Journal of Diseases of Children. 1990; 144(8):911–4.
  • Chio S-S, Urbina EM, LaPointe J, Tsai J, Berenson GS.Korotkoff sound versus oscillometric cuff sphygmomanometers: Comparison between auscultatory and DynaPulse blood pressure measurements. Journal of the American Society of Hypertension. 2011; 5(1):12–20.
  • Graettinger WF, Lipson JL, Cheung DG, Weber MA.Validation of portable noninvasive blood pressure monitoring devices: Comparisons with intra-arterial and sphygmomanometer measurements. American Heart Journal. 1988; 116(4):1155–60.
  • Runciman W. International standards for a safe practice of anaesthesia. European Journal of Anaesthesiology Supplement. 1993; 10:12–5.
  • Landgraf J, Wishner SH, Kloner RA. Comparison of automated oscillometric versus auscultatory blood pressure measurement. The American Journal of Cardiology. 2010; 106(3):386–8.
  • Heinemann M, Sellick K, Rickard C, Reynolds P, McGrail M. Automated versus manual blood pressure measurement: A randomized crossover trial. International Journal of Nursing Practice. 2008; 14(4):296–302.
  • Bobrie G, Genes N, Vaur L, Clerson P, Vaisse B, Mallion J-M, et al. Is isolated home hypertension as opposed to isolated office hypertension a sign of greater cardiovascular risk? Archives of Internal Medicine. 2001; 161(18):2205–11.
  • Arfeen Z, Maran N, Simon E, McClure J. A comparison of non-invasive methods of blood pressure measurement in normotensive and hypertensive pregnant women.International Journal of Obstetric Anesthesia. 1996; 5(3):168–71.
  • Araghi A, Bander JJ, Guzman JA. Arterial blood pressure monitoring in overweight critically ill patients: invasive or noninvasive? Critical Care. 2006; 10(2):R64.
  • Hasan M, Thomas T, Prys-Roberts C. Comparison of automatic oscillometric arterial pressure measurement with conventional auscultatory measurement in the labour ward. British Journal of Anaesthesia. 1993; 70(2):141–4.
  • Brinton TJ, Walls ED, Yajnik AK, Chio S-S. Age-based differences between mercury sphygmomanometer and pulse dynamic blood pressure measurements. Blood Pressure Monitoring. 1998; 3(2):125–9.


  • There are currently no refbacks.

Creative Commons License
This work is licensed under a Creative Commons Attribution 3.0 License.