The Scientific World Journal

Research Article

Noninvasive Techniques for Blood Pressure Measurement Are Not a Reliable Alternative to Direct Measurement: A Randomized Crossover Trial in ICU

Table 1

Differences between patient systolic, diastolic, and mean arterial pressure taken with direct-invasive (IBP) and, respectively, with auscultatory-aneroid (ABP) and oscillometric automated (OBP) methods.


	Systolic	Diastolic	Mean

IBP
Mean ± SD	134.4 ± 24.1	57.9 ± 12.3	81.5 ± 14.5
(median)	(134.5)	(57.0)	(79.5)
ABP
Mean ± SD	124.7 ± 18.3	63.1 ± 12.9	83.7 ± 12.2
(median)	(125.0)	(62.0)	(82.0)
Difference (IBP − ABP)
Mean ± SD	9.7 ± 13.8	−5.1 ± 7.1	−2.1 ± 7.1
(95% CI)	(7.0; 12.5)	(−6.5; −3.7)	(−3.6; −0.7)
value

IBP
Mean ± SD	134.2 ± 24.3	58.0 ± 12.7	81.6 ± 14.6
(median)	(134.0)	(57.0)	(80.0)
OBP
Mean ± SD	123.4 ± 16.7	61.6 ± 11.9	76.2 ± 11.2
(median)	(125.0)	(60.5)	(75.5)
Difference (IBP − OBP)
Mean ± SD	10.8 ± 14.9	−3.6 ± 6.0	5.4 ± 7.1
(95% CI)	(7.8; 13.8)	(−4.8; −2.4)	(4.0; 6.8)
value