Discrepancy of blood pressure between the brachial artery and radial artery

doi:10.5847/wjem.j.issn.1920-8642.2013.04.010

Abstract

Abstract:

BACKGROUND: In this study, we attempted to find the relations between blood pressure (BP) measured on the brachial artery (bBP) and BP assessed on the radial artery (rBP) in the right arm.
METHODS: Three hundred and fifteen patients were enrolled in this study. Those who had peripheral vascular disease, wounds of arm skin or subcutaneous tissue infection were excluded. After a 15-minute equilibration and stabilization period after inducation of anesthesia, three bBP and rBP records were obtained sequentially using an oscillometric device with an adult cuff and infant cuff, respectively. Order for each BP was randomized.
RESULTS: The bBP was significantly lower than the rBP (P<0.05). The difference between the two values varied from 13 to 18 mmHg in systolic BP (SBP), diastolic BP (DBP) and mean blood pressure (MAP) respectively. And the rBP was positively correlated with the bBP (r=0.872, 0.754, 0.765; P<0.001, <0.001, <0.001; SBP, DBP, MAP, respectively).
CONCLUSION: The bBP value can be evaluated by the noninvasive measurements of rBP using an appropriate cuff in clinical practice.

Key words: Blood pressure, Brachial artery, Radial artery, Correlation, Linear regression

Wen-yuan Li, Xiao-hai Wang, Li-chong Lu, Hao Li. Discrepancy of blood pressure between the brachial artery and radial artery[J]. World Journal of Emergency Medicine, 2013, 4(4): 294-297.

Figures/Tables 5

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Figure 1.

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Location	SBP	DBP	MAP
Upper arm	127.9±19.5	79.6±12.6	94.6±14.9
Forearm	145.2±22.7	92.1±13.3	108.4±17.0
P	<0.001	<0.001	<0.001

bSBP (mmHg)	90-99	100-109	110-119	120-129	130-139	140-149	90-149
rSBP-bSBP	17±13	17±10	17±7	18±9	17±11	21±11	18±10
n	22	42	74	63	69	45	315

bDBP (mmHg)	50-59	60-69	70-79	80-89	90-99	100-109	50-109
rDBP-bDBP	17±13	15±8	13±6	12±6	10±5	14±13	13±7
n	16	61	99	98	34	7	315

bMAP (mmHg)	60-69	70-79	80-89	90-99	100-109	110-119	120-129	60-129
rMAP-bMAP	14±7	15±11	15±6	15±7	15±7	13±8	14±8	15±7
n	6	38	106	75	66	22	2	315

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