Validation of the A&D UA-774 (UA-767Plus) device for self-measurement of blood pressure.

OBJECTIVES

To determine the accuracy of the UA-774 (UA-767Plus) blood pressure monitor developed by the A&D Company.

METHODS

Device evaluation was performed according to the modified British Hypertension Society (BHS) protocol released in 1993. Eighty-five subjects with characteristics outlined in the BHS protocol were recruited among those attending the outpatient clinic of the Department of Cardiovascular Disease, Hospital 'R. Silvestrini', Perugia, Italy. The A&D blood pressure monitor was evaluated according to the various steps of the protocol. Sequential readings were taken for the main validation test. Outcome was classified according to the criteria of BSH recommendations, which are based on four areas of accuracy differing from the mercury standard by 5, 10 and 15 mmHg, or more.

RESULTS

The device achieved a grade A for systolic and a grade A for diastolic blood pressure. Mean blood pressure difference (+/-1 SD) between device and observers was -1.01+/-7.14 mmHg for systolic blood pressure and -1.42+/-7.61 mmHg for diastolic blood pressure. There was no systematic change in the device-observed difference over a wide range of blood pressure values

CONCLUSIONS

These data show that the A&D UA-774 (UA-767Plus) device satisfies the BSH recommendations for accuracy for systolic and diastolic blood pressure.