Key result
Linear and nonlinear methods yield comparable pulse wave attenuation estimates in elastic tubes.
Why the study?
Definitive measurements of pulse wave attenuation in elastic tubes and arteries with reflections remain difficult and existing measurement techniques need re-examination.
Population
Elastic tubes mimicking arterial compliance nonlinearity under strong reflection conditions
Comparison
Four classical linear methods of analysis versus a nonlinear forward- and backward-wave separation method
Design
Preclinical experimental study using physiological pulse shapes and amplitudes
Authors
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Linear and nonlinear attenuation methods remain limited in elastic tubes; leaves open development of reliable techniques before vascular research translation.
Current linear and nonlinear methods for measuring pulse wave attenuation in elastic tubes have significant limitations, particularly at higher pulse amplitudes and in backward waveform analysis.
Bertram et al. (1999) studied this question. Linear and nonlinear methods for pulse wave attenuation measurement was evaluated on Pulse wave attenuation. Classical linear methods and a nonlinear separation method provided comparable attenuation estimates in elastic tubes, though a fully satisfactory measurement method remains elusive.
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