Key result
Oscillometric BP measurement outperforms auscultation, which underestimates direct systolic pressure by ~17 mm Hg.
Why the study?
Does cuff blood pressure measurement accurately estimate direct intra-arterial pressure in seriously ill patients?
Population
26 seriously ill patients
Comparison
Cuff blood pressure measurement vs Simultaneous direct intra-arterial pressure
Design
Cross-sectional
Authors
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Cuff systolic underestimation warrants caution interpreting noninvasive BP in critically ill patients; leaves open need for validation of corrections or direct measurement.
Observational (n=26)
Does cuff blood pressure measurement accurately estimate direct intra-arterial pressure in seriously ill patients?
In critically ill patients, oscillometric measurement of systolic pressure and K5 measurement of diastolic pressure provide the best indirect estimates of blood pressure, despite inherent biases compared to direct intra-arterial measurement.
Keith et al. (1984) conducted an observational in Seriously ill (n=26). Cuff pressure measurement (oscillometric and auscultatory) vs. Direct intra-arterial pressure was evaluated on Difference between cuff and direct intra-arterial pressure. Conventional auscultation underestimated direct systolic pressure by 16-17 mm Hg, whereas oscillometric measurement provided a better estimate but still underestimated it by 7-8 mm Hg.
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