P9.05 INFLUENCE OF PERIPHERAL BLOOD PRESSURE CALIBRATION ON THE ESTIMATION OF CENTRAL BLOOD PRESSURE

DOI

10.1016/j.artres.2009.10.125How to use a DOI?

Abstract

Objective: To examine the influence of calibration of peripheral blood pressure on the estimation of central systolic blood pressure (cSBP) from peripheral arterial waveforms using a transfer function.

Methods: Central aortic pressure was measured with a pressure tipped catheter (Millar, Houston, Texas) placed in the proximal aortic root in 30 subjects at the time of cardiac catheterisation. Digital pressure waveforms were acquired using a Finometer (Finapres, Netherlands). Non-invasive brachial artery pressure was measured oscillometrically (Omron 705IT, Omron, Japan). Measurements were obtained at baseline and after nitroglycerin (500μg sublingual). Digital arterial waveforms were calibrated using 1) oscillometric systolic and diastolic pressures 2) oscillometric mean and diastolic pressures 3) invasive aortic mean and diastolic pressures. The same transfer function was applied to these waveforms to estimate cSBP and estimated cSBP compared with measured values. Accuracy of peripheral oscillometric blood pressure was assessed by comparison with the invasively calibrated digital waveform.

Results: Oscillometric values of systolic, diastolic and mean pressures were 1.1±14.5 lower, 11.9±7.6 higher and 7.9±6.8 mmHg higher (means±SD) respectively than values obtained by invasive calibration. When digital waveforms were calibrated from oscillometric systolic and diastolic pressures estimated cSBP was 3.3±11.2 mmHg higher than measured cSBP and when calibrated using oscillometric mean and diastolic pressures estimated cSBP was 3.7±10.7 mmHg higher than measured cSBP.

Conclusion: Although systematic errors in estimation of peripheral blood pressure are high, they may compensate so that cSBP can be estimated without much systematic error.

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TY  - JOUR
AU  - A. Guilcher
AU  - S. Brett
AU  - B. Clapp
AU  - P. Chowienczyk
PY  - 2009
DA  - 2009/12/03
TI  - P9.05 INFLUENCE OF PERIPHERAL BLOOD PRESSURE CALIBRATION ON THE ESTIMATION OF CENTRAL BLOOD PRESSURE
JO  - Artery Research
SP  - 168
EP  - 168
VL  - 3
IS  - 4
SN  - 1876-4401
UR  - https://doi.org/10.1016/j.artres.2009.10.125
DO  - 10.1016/j.artres.2009.10.125
ID  - Guilcher2009
ER  -