Key result
An in-ear pulse wave velocity measurement system using heart sounds as a time reference was developed to determine the transient time of the pulse wave between the heart and the ear.
Describes the development of a novel in-ear sensor system to measure pulse wave velocity using heart sounds as a time reference.
May enable convenient in-ear PWV assessment; leaves open validation for accuracy and clinical utility.
Pulse wave measurements provide vital information in medical diagnosis. For this reason, a measurement system is developed for determining the transient time of the pulse wave between the heart and the ear. To detect pressure variations in the sealed ear canal, caused by the arriving pulse wave, an in-ear sensor is developed which uses heart sounds as time reference. Furthermore, for extracting the heart sounds from the pressure measurements and calculating the pulse wave transient time, a MATLAB-based algorithm is described. An embedded microcontroller based measurement board is presented, which realizes an interface between the sensor and the computer for signal processing.
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Kusche et al. (2015) studied this question. In-ear pulse wave velocity measurement system was evaluated. An in-ear pulse wave velocity measurement system using heart sounds as a time reference was developed to determine the transient time of the pulse wave between the heart and the ear.
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