Unobtrusive ECG monitoring in the NICU using a capacitive sensing array
Unobtrusive ECG monitoring in the NICU using a capacitive sensing array
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DOI：
10.1088/0967-3334/35/5/895
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发表时间：
2014-05-01
影响因子：
3.2
通讯作者：
Oetomo, S. Bambang
中科院分区：
文献类型：
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作者：
Atallah, L.;Serteyn, A.;Oetomo, S. Bambang
早产儿的薄皮肤很容易被电极、胶带、胸腔引流管和针痕损坏。这些疤痕可能会导致10%的早产新生儿毁容或致残。电容式传感器为广泛监测新生儿心电图提供了一个有吸引力的选择，并且可以嵌入到支持系统中，甚至可以嵌入到新生儿穿的衣服中。这可以提高舒适度，减轻疼痛，帮助更好地恢复，并避免由粘接电极造成的疤痕。在这项工作中，我们研究了一组电容传感器的使用，这些传感器不显眼地嵌入床垫中，并在临床环境中用于15名早产儿。我们还描述了分析框架，包括融合来自所有传感器的信息，以提供更准确的心电信号。我们提出了一种信道选择策略和一种利用生理信息获得可靠心电信号的方法。当传感器覆盖范围很好时，瞬时心率和心电信号形状分析的结果都非常令人鼓舞。该研究还对影响结果的重要因素提供了一些见解。这些因素包括织物类型、层数、干扰（如行人经过）、运动严重程度和干预措施的影响。将这些知识纳入电容传感系统的设计中，对于确保这些传感器在嵌入新生儿支持系统时提供可靠的心电信号至关重要。
The thin skin of preterm babies is easily damaged by adhesive electrodes, tapes, chest drains and needle-marks. The scars caused could be disfiguring or disabling to 10% of preterm newborns. Capacitive sensors present an attractive option for pervasively monitoring neonatal ECG, and can be embedded in a support system or even a garment worn by the neonate. This could improve comfort and reduce pain aiding better recovery as well as avoiding the scars caused by adhesive electrodes. In this work, we investigate the use of an array of capacitive sensors unobtrusively embedded in a mattress and used in a clinical environment for 15 preterm neonates. We also describe the analysis framework including the fusion of information from all sensors to provide a more accurate ECG signal. We propose a channel selection strategy as well as a method using physiological information to obtain a reliable ECG signal. When sensor coverage is well attained, results for both instantaneous heart rate and ECG signal shape analysis are very encouraging. The study also provides several insights on important factors affecting the results. These include the effect of textile type, number of layers, interferences (e.g. people walking by), motion severity and interventions. Incorporating this knowledge in the design of a capacitive sensing system would be crucial in ensuring that these sensors provide a reliable ECG signal when embedded in a neonatal support system.