Figure 3.

Agreement between auscultatory and oscillometric, and intra-arterial blood pressure measurements: effect of SBP. Shown are graphs of measurement in patients with (a) SBP <140 mmHg and (b) SBP ≥140 mmHg by auscultatory technique, and in patients with (c) SBP <140 mmHg and (d) SBP ≥140 mmHg by oscillometric technique. A total of 23 patients had SBP <140 mmHg and 31 had SBP ≥140 mmHg. The thicker line represents mean bias, and the thinner lines represent upper and lower limits of agreement. Squares are diastolic blood pressure measurement, diamonds are mean arterial blood pressure measurements, and circles are systolic blood pressure measurements. IABP, intra-arterial blood pressure; NIBP, noninvasive blood pressure; SBP, systolic blood pressure.