Standard office device
The Omron M6 Comfort is an oscillometric automatic digital upper arm blood pressure monitor suitable for home and clinical blood pressure measurements, which is frequently used but also not validated in pregnancy (Table 1). However, comparable other series of Omron Healthcare have been validated in pregnancy.21 It is not possible to link the connected device to the to the patients’ medical records. In our hospital this device was used at the time of phase 1 of this study as a standard for measuring blood pressure at the outpatient clinic.
The Welch Allyn 53000P is an oscillometric automatic digital upper arm blood pressure monitor suitable for clinical blood pressure measurements, which has been validated for the use in pregnancy22 (Table 1). To deal with the influence of physician induced white coat hypertension, we changed the logistic at our outpatient clinic during phase 2 of this study, where standard office blood pressure measurement was performed in a quiet room by an obstetric nurse. For this, Welch Allyn 5300P was used.