Determining carotid artery pressure from scaled diameter waveforms: comparison and validation of calibration techniques in 2026 subjects.
作者： S J Vermeersch , E R Rietzschel , M L De Buyzere , D De Bacquer , G De Backer
DOI: 10.1088/0967-3334/29/11/003
关键词:
摘要: Calibrated diameter distension waveforms could provide an alternative for local arterial pressure assessment more widely applicable than applanation tonometry. We compared linearly and exponentially calibrated carotid to tonometry readings. Local pressures measured by ultrasound were obtained in 2026 subjects participating the Asklepios study protocol. Diameter using a linear exponential calibration scheme examining mean root-mean-squared error (RMSE), systolic blood (SBPcar) augmentation index (AIx) of pressures. Mean RMSE was 5.2(3.3) mmHg (mean(stdev)) 4.6(3.6) calibration. Linear yielded underestimation SBPcar 6.4(4.1) which strongly correlated values brachial pulse (PPbra) (R = 0.4, P < 0.05). Exponential underestimated true 1.9(3.9) mmHg, independent PPbra. AIx overestimated 1.9(10.1)%, difference significantly increasing with 0.25, 0.001) 5.4(10.6)%, independently value AIx. Properly offer viable estimation at artery. Compared calibration, improves estimation.
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