P7.16 VALIDATION OF AN OSCILLOMETRIC BRACHIAL CUFF METHOD TO DERIVE CENTRAL BLOOD PRESSURE USING DIFFERENT CALIBRATION MODES

DOI

10.1016/j.artres.2015.10.319How to use a DOI?

Abstract

Background: There is interest in measuring central blood pressure (BP) from non-invasive upper-arm cuff devices, the accuracy of which may be influenced by different calibration modes. The aim of this study was to determine the validity of an upper-arm cuff oscillometric device to estimate central BP by comparison to invasively acquired aortic BP, using different calibration modes.

Methods: 122 patients (mean age 63±13 years) undergoing coronary angiography had simultaneous measurement of ascending aortic BP (via fluid-filled catheter) and non-invasive upper-arm cuff oscillometry (Sphygmocor Xcel) to estimate central BP. A ‘derivation’ cohort (n=60, 117 simultaneous measures) was randomly selected to produce different calibration modes to estimate central systolic BP. These different calibration modes were then applied to the remaining ‘validation’ cohort (n=62, 119 simultaneous measures).

Results: Conventional calibration with brachial systolic and diastolic BP underestimated central systolic BP (mean difference −7.2±9.6 mmHg) with evidence of bias at higher BP values (r=−0.50; p<0.001). The same was observed for oscillometric mean arterial pressure and diastolic BP calibration, but with greater underestimation (mean difference −19.6±11.9 mmHg) and bias (r=−0.72; p<0.001). A refined calibration mode significantly improved central systolic BP estimation (mean difference 1.0±11.0 mmHg) and removed all bias (r=0.07; p=0.45). Moreover, this method had greater sensitivity (79.5%) and specificity (80.0%) for predicting central hypertension (invasive aortic systolic BP ≥130 mmHg) compared to other methods.

Conclusions: Significant improvements in accuracy for estimating central BP are achieved through refinement of standard, non-invasive calibration modes using an oscillometric brachial cuff device.

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TY  - JOUR
AU  - Martin Schultz*
AU  - Ahmad Qasem
AU  - Xiaoqing Peng
AU  - Dean Picone
AU  - J. Andrew Black
AU  - Nathan Dwyer
AU  - Phillip Roberts-Thomson
AU  - James Sharman
PY  - 2015
DA  - 2015/11/23
TI  - P7.16 VALIDATION OF AN OSCILLOMETRIC BRACHIAL CUFF METHOD TO DERIVE CENTRAL BLOOD PRESSURE USING DIFFERENT CALIBRATION MODES
JO  - Artery Research
SP  - 33
EP  - 33
VL  - 12
IS  - C
SN  - 1876-4401
UR  - https://doi.org/10.1016/j.artres.2015.10.319
DO  - 10.1016/j.artres.2015.10.319
ID  - Schultz*2015
ER  -