Hypertension, Vol 20, 227-232, Copyright © 1992 by American Heart Association
A Groppelli, S Omboni, G Parati and G Mancia
This study evaluated the accuracy of blood pressure values provided by the
Spacelabs 90202 and 90207 devices in comparison with intra-arterial
recording in 19 subjects at rest and in nine subjects in ambulatory
conditions (Oxford method). At rest Spacelabs monitors reflected intra-
arterial systolic blood pressure values very closely but overestimated to a
considerable extent intra-arterial diastolic blood pressure
(Spacelabs-intra-arterial differences, -0.8 +/- 9.2, NS, and 9.1 +/- 8.8 mm
Hg, p less than 0.01, for systolic and diastolic blood pressures,
respectively). In ambulatory conditions Spacelabs-intra- arterial average
differences in 24-hour values were +0.4 +/- 5.1 mm Hg for systolic blood
pressure (NS) and +14.0 +/- 2.9 mm Hg for diastolic blood pressure (p less
than 0.01) when group data were considered. The performance of both
Spacelabs devices was worse when assessed in individual subjects or for
each hourly interval. In spite of these differences between noninvasive and
intra-arterial absolute blood pressure values, however, Spacelabs 90202 and
90207 monitors were able to faithfully reflect directional hour-to-hour
changes in intra- arterial blood pressure (chi 2 = 18.2 and chi 2 = 23.1
for systolic and diastolic blood pressures, respectively, p less than
0.01). No differences were found between the performance of the two
Spacelabs devices. Thus, although the absolute accuracy of blood pressure
values provided by these monitors in ambulatory subjects is still limited,
they seem to be suitable for studies aimed at assessing 24-hour blood
pressure profiles quantitatively as well as qualitatively.
ARTICLES
Evaluation of noninvasive blood pressure monitoring devices Spacelabs 90202 and 90207 versus resting and ambulatory 24-hour intra-arterial blood pressure
Cattedra di Medicina Interna, Ospedale San Gerardo, Monte, Italy.
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