Objective To assess the clinical accuracy of the Mobil O Graph (version 12)
ambulatory blood pressure monitor in an adult population.
Methods The accuracy of the device was assessed by predefined criteria (Bri
tish Hypertension Society, BHS) in 85 subjects recruited from the patients
and staff in a teaching hospital. A series of same-arm sequential blood pre
ssure measurements were taken: first two observers taking simultaneous merc
ury readings, followed by a reading with the Mobil O Graph ambulatory monit
or. A total of seven readings were taken from each subject in the sitting p
osition. The data were then analysed according to the BHS protocol and the
criteria of the Association for the Advancement of Medical Instrumentation
(AAMI).
Results The Mobil O Graph ambulatory monitor fulfilled the criteria of the
BHS protocol, achieving a grade B for systolic blood pressure (SBP) and a g
rade A for diastolic blood pressure (DBP), The mean differences were -2 +/-
8 mmHg for SEP and -2 +/- 7 mmHg for DBP. The device therefore also passed
the AAMI standard (the mean to be within 5 +/- 8 mmHg).
Conclusion The Mobil O Graph ambulatory monitor performed in a satisfactory
manner according to the BHS and the AAMI criteria and can therefore be rec
ommended for clinical use in the general population. (C) 2000 Lippincott Wi
lliams & Wilkins.