Comparison of automated oscillometric versus auscultatory blood pressure measurement

The American Journal of Cardiology
Johanna LandgrafRobert A Kloner

Abstract

Most clinical offices rely on automated oscillometric devices to measure blood pressure (BP), but the accuracy of this technique versus auscultatory determination using a mercury manometer is controversial. To assess the accuracy of automated oscillometric readings, BP was measured from the same site and cuff, in 337 consecutive patients seen in a routine cardiology office, using a simultaneous connection to an automated oscillometric and a mercury manometer technique. The mean systolic BP (133 +/- 20 mm Hg) and diastolic BP (72 +/- 11 mm Hg) were significantly greater using the mercury manometer than the automated oscillometric technique (systolic 131 +/- 18 and diastolic 70 +/- 12 mm Hg, p <0.0001). Discrepancies (almost always lower oscillometric and greater mercury manometer) in systolic BP were seen in 22% of all patients. Discrepancies in diastolic BP were seen in 20% of all patients. The mean of the discrepancy between the 2 techniques was 1.95 +/- 5 mm Hg (range 1 to 26) for systolic BP and 1.3 +/- 4 mm Hg (range 1 to 25) for diastolic BP. The discrepancies were greater in patients >65 years. In conclusion, the mercury manometer technique resulted in consistently greater BP values than oscillometric devices. These findi...Continue Reading

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