TY - JOUR
T1 - Reconstruction of the aortic pressure waveform using a two-level adaptive transfer function strategy
AU - Du, Shuo
AU - Liu, Wenyan
AU - Yao, Yang
AU - Sun, Guozhe
AU - He, Ying
AU - Alastruey, Jordi
AU - Xu, Lisheng
AU - Yao, Yudong
AU - Qian, Wei
N1 - Publisher Copyright:
© 2022 Elsevier Ltd
PY - 2022/11/30
Y1 - 2022/11/30
N2 - Existing studies cannot estimate the high-frequency components of the aortic pressure waveform (APW) practically and reliably. To solve this problem, a two-level adaptive transfer function (ATF) strategy was proposed. Two ATFs were derived from raw and normalized brachial and aortic pressure waveforms. The APW was reconstructed with the amplitude and pulsatility information from the two ATFs. Experimental results showed that our method achieved lower errors for total waveform, diastolic blood pressure, the pressures at the start-systolic and dicrotic-notch points, and three high-frequency-dependent indices including the pressure at inflection point, augmentation index and the time interval from foot to inflection points (3.11 versus 4.24 mmHg, 1.74 versus 1.94 mmHg, 2.56 versus 2.75 mmHg, 6.94 versus 7.47 mmHg, 3.35 versus 3.80 mmHg, 9.56 versus 10.48 % and 24.64 versus 27.73 ms, respectively) compared with traditional generalized transfer function. The proposed method can accurately estimate both the shape and high-frequency components of APW.
AB - Existing studies cannot estimate the high-frequency components of the aortic pressure waveform (APW) practically and reliably. To solve this problem, a two-level adaptive transfer function (ATF) strategy was proposed. Two ATFs were derived from raw and normalized brachial and aortic pressure waveforms. The APW was reconstructed with the amplitude and pulsatility information from the two ATFs. Experimental results showed that our method achieved lower errors for total waveform, diastolic blood pressure, the pressures at the start-systolic and dicrotic-notch points, and three high-frequency-dependent indices including the pressure at inflection point, augmentation index and the time interval from foot to inflection points (3.11 versus 4.24 mmHg, 1.74 versus 1.94 mmHg, 2.56 versus 2.75 mmHg, 6.94 versus 7.47 mmHg, 3.35 versus 3.80 mmHg, 9.56 versus 10.48 % and 24.64 versus 27.73 ms, respectively) compared with traditional generalized transfer function. The proposed method can accurately estimate both the shape and high-frequency components of APW.
KW - Aortic pressure waveform
KW - Brachial pressure waveform
KW - High-frequency components
KW - Two-level adaptive transfer function strategy
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U2 - 10.1016/j.measurement.2022.112111
DO - 10.1016/j.measurement.2022.112111
M3 - Article
AN - SCOPUS:85140929642
SN - 0263-2241
VL - 204
JO - Measurement: Journal of the International Measurement Confederation
JF - Measurement: Journal of the International Measurement Confederation
M1 - 112111
ER -