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Quantifying Movement in Preterm Infants Using Photoplethysmography.

A new interesting article has been published in Ann Biomed Eng. 2018 Sep 25. doi: 10.1007/s10439-018-02135-7. and titled:

Quantifying Movement in Preterm Infants Using Photoplethysmography.

Authors of this article are:
Zuzarte I Indic P Sternad D Paydarfar D.

A summary of the article is shown below:
Long-term recordings of movement in preterm infants might reveal important clinical information. However, measurement of movement is limited because of time-consuming and subjective analysis of video or reluctance to attach additional sensors to the infant. We evaluated whether photoplethysmogram (PPG), routinely used for oximetry in preterm infants in the neonatal intensive care unit (NICU), can provide reliable long-term measurements of movement. In 18 infants [mean post-conceptional age (PCA) 31.10 weeks, range 29-34.29 weeks], we designed and tested a wavelet-based algorithm that detects movement signals from the PPG. The algorithm’s performance was optimized relative to subjective assessments of movement using video and accelerometers attached to two limbs and force sensors embedded within the mattress (five infants, three raters). We then applied the optimized algorithm to infants receiving routine care in the NICU without additional sensors. The algorithm revealed a decline in brief movements (< 5 s) with increasing PCA (13 infants, r = - 0.87, p < 0.001, PCA range 27.3-33.9 weeks). Our findings suggest that quantitative relationships between motor activity and clinical outcomes in preterm infants can be studied using routine photoplethysmography.
Check out the article’s website on Pubmed for more information:

This article is a good source of information and a good way to become familiar with topics such as: Continuous wavelet transform;Motor development;Movement detection;Photoplethysmography;Preterm movement.

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