Biocompatible Packaging and Testing of an Endocardial Accelerometer for Heart Wall Motion Analysis

A sensor system for the acquisition of acceleration signals from different locations on the heart wall during acute tests is described. A commercially available miniature three-axis accelerometer is mounted on a small, circular PCB. Three coating layers are applied to ensure the biocompatibility of...

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Bibliographic Details
Main Authors: Brancato, L., Weydts, T., De Clercq, H., Dimiaux, T., Herijgers, P., Puers, R.
Format: Conference Proceeding
Language:English
Subjects:
accelerometer
contraction
Endocardial
heart wall
packaging
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Summary:A sensor system for the acquisition of acceleration signals from different locations on the heart wall during acute tests is described. A commercially available miniature three-axis accelerometer is mounted on a small, circular PCB. Three coating layers are applied to ensure the biocompatibility of the sensor: parylene-C, medical grade epoxy and PDMS. The device, intended for use during animal experiments, is shaped as a hemisphere with radius 2mm. The sensor assembly is a dedicated design that allowsinsertion through the heart wall and fixation on the muscle. A dedicated data acquisition board enables to readout digital acceleration data and ECG signal, and to transmit it wirelessly to a remote receiver. The device was tested in-vitro for electricalisolationand water diffusion. Later,in-vivo performance was evaluated by acquiring acceleration signals from different sites on the cardiac muscle of a sheep.
ISSN:1877-7058
1877-7058
DOI:10.1016/j.proeng.2015.08.704