P9.05 INFLUENCE OF PERIPHERAL BLOOD PRESSURE CALIBRATION ON THE ESTIMATION OF CENTRAL BLOOD PRESSURE
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- 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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Cite this article
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 -