title: Validation of the Omron MX3 Plus oscillometric blood pressure monitoring device according to the European Society of Hypertension international protocol.
abstract: BACKGROUND
  Demand for devices that allow the self-assessment of blood pressure continues to rise. Few self-assessment devices, however, have been validated against recognised protocols. The aim of this study was to validate the Omron MX3 Plus (model HEM-742-E) oscillometric blood pressure measuring device in accordance with the international protocol of the European Society of Hypertension. This automated device is currently available to the public in the UK through high-street chemists and other outlets.
  
  
  METHODS
  The European Society of Hypertension's international protocol for validation of blood pressure measuring devices in adults divides validation into two phases. The first phase is performed on 15 individuals, five in each of three specific blood pressure categories. If the device passes the first phase then a further 18 patients are recruited, making a total of 33 individuals on which the final validation is based. All subjects are aged 30 years or above.
  
  
  METHODS
  The automated device was connected in parallel to two reference mercury sphygmomanometers. Nine sequential same-arm measurements were taken from each subject by two trained observers, alternating between the mercury sphygmomanometers and the test device.
  
  
  RESULTS
  The Omron MX3 Plus passed both phases of the ESH validation process. The mean (standard deviation) of the difference between the observer and the device measurements was -1.15 (5.7) mmHg for systolic and -1.61 (4.7) mmHg for diastolic pressures, respectively.
  
  
  CONCLUSIONS
  The Omron MX3 Plus can be recommended for home and professional use in an adult population.
authors.affiliation: Medical Physics Department, Guy's & St Thomas' NHS Foundation Trust, London, UK. Andrew.Coleman@gstt.nhs.uk
authors.forename: Andrew
authors.initials: A
authors.lastname: Coleman
authors.forename: Paul
authors.initials: P
authors.lastname: Freeman
authors.forename: Stephen
authors.initials: S
authors.lastname: Steel
authors.forename: Andrew
authors.initials: A
authors.lastname: Shennan
mesh_terms: D000328:Adult; D000368:Aged; D018660:Blood Pressure Monitoring, Ambulatory / Q000295:instrumentation*; D005260:Female; D006801:Humans; D006973:Hypertension / Q000175:diagnosis* / Q000503:physiopathology*; D008297:Male; D008875:Middle Aged; D009991:Oscillometry / Q000295:instrumentation*; D015203:Reproducibility of Results; D012955:Societies, Medical; D019722:Sphygmomanometers