title: Validation of the Samsung SBM-100A and Microlife BP 3BU1-5 wrist blood pressure measuring devices in adults according to the International Protocol.
abstract: OBJECTIVE
  A variety of automatic blood measurement devices with diverse features have been introduced to the medical markets recently. Among these devices, models that measure at the wrist have become increasingly popular in self measurements. The objective of this study was to evaluate the accuracy of the Samsung SBM-100A and Microlife BP 3BU1-5 wrist blood pressure devices against the mercury sphygmomanometer in adults according to the International Protocol criteria.
  
  
  METHODS
  Fifty-four patients over 30 years of age were studied and classified based on the International Protocol range. Blood pressure measurements at the wrist with the Samsung SBM-100A and Microlife BP 3BU1-5 were compared with the results obtained by two trained observers using a mercury sphygmomanometer. Nine sequential blood pressure measurements were taken. A total of 33 participants with randomly distributed arm circumferences were selected for both of the validation studies. During each validation study, 99 measurements were obtained for comparison from 33 participants. The first phase was performed on 15 participants and if the device passed this phase, 18 more participants were selected.
  
  
  RESULTS
  Mean discrepancies and standard deviations of the device-sphygmomanometer were 0.9+/-9.2 and -2.7+/-9.3 mmHg for systolic blood pressure and -1.4+/-8.0 mmHg and 1.4+/-5.7 for diastolic blood pressure in the Samsung and Microlife study groups, respectively. The Samsung SBM-100A passed Phase 1 in 15 participants. Despite the fact that Microlife BP 3BU1-5 passed Phase 1 for diastolic pressure, it failed according to the systolic pressure criteria. Eighteen patients were added and Phase 2 was continued, in which Samsung SBM-100A failed to meet the criteria of Phases 2.1 and 2.2 for adults in systolic and diastolic blood pressure. It was found that the Microlife BP 3BU1-5 does not meet the criteria of either of Phases 2.1 and 2.2 for systolic blood pressure and Phase 2.2 for diastolic blood pressure.
  
  
  CONCLUSIONS
  In this study, Samsung SBM-100A and Microlife blood pressure 3BU1-5 wrist blood pressure monitoring devices were found to be incompetent to meet the criteria of the International Protocol and it has not been possible to suggest any one of them for clinical use in adults.
authors.affiliation: Hypertension Division, Metropol Medical Center, and Department of Internal Medicine, Dişkapi Yildirim Beyazit Education and Research Hospital, Nisan Sokak No. 7, 06400 Dikmen, Ankara, Turkey. saltunkan@superonline.com
authors.forename: Sekip
authors.initials: S
authors.lastname: Altunkan
authors.forename: Nevzat
authors.initials: N
authors.lastname: Ilman
authors.forename: Erkan
authors.initials: E
authors.lastname: Altunkan
mesh_terms: D000328:Adult; D001795:Blood Pressure Determination / Q000295:instrumentation* / Q000592:standards*; D004868:Equipment Failure; D005260:Female; D006801:Humans; D006973:Hypertension / Q000175:diagnosis*; D008297:Male; D008875:Middle Aged; D015203:Reproducibility of Results; D019722:Sphygmomanometers; D014953:Wrist