Publications by authors named "Lonneke A M Aarts"

2 Publications

  • Page 1 of 1

Non-contact heart rate monitoring utilizing camera photoplethysmography in the neonatal intensive care unit - a pilot study.

Early Hum Dev 2013 Dec 14;89(12):943-8. Epub 2013 Oct 14.

Department of Pediatrics, Máxima Medical Center, Veldhoven, The Netherlands. Electronic address:

Background: Presently the heart rate is monitored in the Neonatal Intensive Care Unit with contact sensors: electrocardiogram or pulse oximetry. These techniques can cause injuries and infections, particularly in very premature infants with fragile skin. Camera based plethysmography was recently demonstrated in adults as a contactless method to determine heart rate.

Aim: To investigate the feasibility of this technique for NICU patients and identify challenging conditions.

Study Design And Participants: Video recordings using only ambient light were made of 19 infants at two NICUs in California and The Netherlands. Heart rate can be derived from these recordings because each cardiovascular pulse wave induces minute pulsatile skin color changes, invisible to the eye but measurable with a camera.

Results: In all infants the heart beat induced photoplethysmographic signal was strong enough to be measured. Low ambient light level and infant motion prevented successful measurement from time to time.

Conclusions: Contactless heart rate monitoring by means of a camera using ambient light was demonstrated for the first time in the NICU population and appears feasible. Better hardware and improved algorithms are required to increase robustness.
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December 2013

Nocturnal apnea in Chiari type I malformation.

Eur J Pediatr 2011 Oct 4;170(10):1349-52. Epub 2011 Jun 4.

Department of Pediatrics, Máxima Medical Centre, Veldhoven Postbus 7777, 5500 MB Veldhoven, the Netherlands.

Unlabelled: A 4-year-old girl presented with sleep-disordered breathing. Her parents described breathing pauses of up to 20 s and progressive tiredness during the day. Obstructive apneas from an enlarged adenoid were thought to be the most probable cause. However, an adenotomy did not resolve the problem. Polysomnography demonstrated central apneas, and cerebral magnetic resonance imaging revealed a Chiari type I malformation. We describe the differential diagnosis of apnea in children and the role of polysomnography in the distinction between obstructive and central apneas.

Conclusion: This case illustrates that, in children with apnea, it is important to consider central causes as well as the more common obstructive causes, even in the absence of additional neurological signs or symptoms.
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October 2011