Improving the Design of Blood Pressure and Blood Saturation Monitors

Authors: L. Parisi

Abstract:

A blood pressure monitor or sphygmomanometer can be either manual or automatic, employing respectively either the auscultatory method or the oscillometric method. The manual version of the sphygmomanometer involves an inflatable cuff with a stethoscope adopted to detect the sounds generated by the arterial walls to measure blood pressure in an artery. An automatic sphygmomanometer can be effectively used to monitor blood pressure through a pressure sensor, which detects vibrations provoked by oscillations of the arterial walls. The pressure sensor implemented in this device improves the accuracy of the measurements taken.

Keywords: Blood pressure, blood saturation, sensors, actuators, design improvement.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1096359

References:

[1] White, WB; Importance of aggressive blood pressure lowering when it may matter most. Am J Cardiol. 2007 Aug 6;100(3A):10J-16J. Epub 2007 May 25.
[2] Wexler, R; Ambulatory blood pressure monitoring in primary care. South Med J. 2010 May;103(5):447-52.
[3] Clement, DL; De Buyzere, ML; De Bacquer, DA, et al; Prognostic value of ambulatory blood-pressure recordings in patients with treated hypertension. N Engl J Med. 2003 Jun 12;348(24):2407-15.
[4] McGrath, BP; Ambulatory blood pressure monitoring. Med J Aust. 2002 Jun 17;176(12):588-92.
[5] Mancia, G; Parati, G; Office compared with ambulatory blood pressure in assessing response to antihypertensive treatment: a meta-analysis. J Hypertens. 2004 Mar;22(3):435-45.
[6] Ernst, ME; Bergus, GR; Ambulatory blood pressure monitoring. South Med J. 2003 Jun;96(6):563-8.
[7] http://i00.i.aliimg.com/wsphoto/v1/578669496_1/Fully-font-b- Automatic-b-font-Digital-Upper-Arm-Blood-Pressure-and-Pulse- Monitor-font-b.jpg.
[8] http://image.dhgate.com/albu_233630904_00-1.0x0/home-digital-lcdwrist- cuff-blood-pressure.jpg.
[9] Haydar, AA; Covic, A; Jayawardene, S, et al; Insights from ambulatory blood pressure monitoring: diagnosis of hypertension and diurnal blood pressure in renal transplant recipients. Transplantation. 2004 Mar 27;77(6):849-53.
[10] Fagard, RH; Staessen, JA; Thijs, L, et al; Relationship between ambulatory blood pressure and follow-up clinic blood pressure in elderly patients with systolic hypertension. J Hypertens. 2004 Jan;22(1):81-7.
[11] O'Brien, E; Beevers, G; Lip, GY; ABC of hypertension: Blood pressure measurement. Part IV-automated sphygmomanometry: self blood pressure measurement. BMJ. 2001 May 12;322(7295):1167-70.
[12] ISO 9919:2005 Medical electrical equipment – Particular requirements for the basic safety and essential performance of pulse oximeter equipment for medical use.
[13] D.J., McGraw, How LED Wavelength Effects Accuracy in Pulse Oximetry, OSA TOPS on Biomedical Optical Spectroscopy and Diagnostics, 1996, Vol. 3. Page (76-82).
[14] deKock J.P., Tarassenko L, Moyle J.T.B. (1991) The effect of varying LED intensity on pulse oximetry accuracy. J. Med Eng. & Tech.; 15: 111-115.
[15] http://www.oximetry.org/pulseox/principles.htm.
[16] A Technology Overview of the Nellcor@ OxiMax@ Pulse Oximetry System Ne//cor Technical Staff, 2003 Nellcor Puritan Bennett Inc, available at www.nellcor.com/_Catalog/PDF/Product/ OxiMaxTechNote.pdf accessed 13/12/2013).
[17] G.R., Mathews et al, The Pulse - The Newsletter of The Electrode Co. - Issue 5, 2004.
[18] HME Lifepulse 29 Appendix 1: Standards Used for Testing, MDA evaluation no 303, November –1996 (Latterly MHRA).
[19] ECRI – Compatibility of Alternative Source Pulse Oximeter Sensors, Health Devices.
[20] Thomson, Alistair J.; Webb, David J; Maxwell, Simon RJ; Grant, Ian S. Oxygen Therapy in Acute Medical Care. BMJ 2002. 324.
[21] Harten, JM; Anderson, KJ; Kinsella, J; Higgins, MJ. Normobarichyperoxia reduces cardiac index in patients after coronary artery bypass surgery. J CardiothacVascAnaesth. 2005 Apr, 19(2):173-5
[22] http://www.meas-spec.com/product/pressure-sensor-1630.aspx.
[23] http://www.alibaba.com/productgs/ 752802124/silicon_blood_medical_pressure_sensor.html?s=p
[24] http://www.vernier.com/products/sensors/bps-bta/.
[25] http://www.digikey.co.uk/Web%20Export/Supplier%20Content/GESens ing_45/PDF/ge-sensing-brochure-pressure-sensor.pdf?redirected=1.
[26] http://www.nagelnetwork.com/Digit3.jpg.
[27] http://www.pmedicalonline.com/media/00/a20791d12453a3d59bdfd2_m .jpg.
[28] http://www.reptonmedical.co.uk/media/catalog/product/cache/1/image/9 df78eab33525d08d6e5fb8d27136e95/o/x/oximeter_probe_wraplarge_ 2.jpg.
[29] http://www.alldaymedical.com/images/prodimages/BI1301_PI.jpg.
[30] http://www.hce-uk.com/BCI-3420-Y-Digit-Finger-Tip-Pulse-Oximeter.
[31] http://www.swissmedmobile.com/sensors;
[32] http://spo2monitor.net/oxygen_monitor.html;
[33] http://www.healthcare4all.co.uk/Pulse_Oximeters?gclid=CPet7MOCtbs CFWnjwgodIAgAmQ.