Artery Research

Volume 12, Issue C, December 2015, Pages 33 - 33

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

Authors
Martin Schultz*1, Ahmad Qasem2, Xiaoqing Peng1, Dean Picone1, J. Andrew Black3, Nathan Dwyer3, Phillip Roberts-Thomson3, James Sharman1
1Menzies Institute for Medical Research, University of Tasmania, Hobart, Australia
2University of New South Wales, Sydney, Australia
3Royal Hobart Hospital, Hobart, Australia
Available Online 23 November 2015.
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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Journal
Artery Research
Volume-Issue
12 - C
Pages
33 - 33
Publication Date
2015/11/23
ISSN (Online)
1876-4401
ISSN (Print)
1872-9312
DOI
10.1016/j.artres.2015.10.319How to use a DOI?
Open Access
This is an open access article distributed under the CC BY-NC license.

Cite this article

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  -