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April 10, 2017




MEDICALLY MONITORING PREMATURE BABIES WITH CAMERAS

by Laure-Anne Pessina, Ecole Polytechnique Federale de Lausanne

Credit: Marc Delachaux / 2017 EPFL

Researchers at EPFL and CSEM have developed a contactless and wireless camera
system to continuously monitor the vital signs of premature babies. This system
could replace skin sensors, which cause false alarms nearly 90% of the time.
Preliminary tests will soon be carried out on newborns at University Hospital
Zurich, a partner in the project.





In the near future, premature babies kept warm in neonatal incubators could be
medically monitored using cameras rather than with sensors attached to their
skin. This system is about to be tested on preemies at University Hospital
Zurich (USZ-CH). The underlying technology was developed by EPFL, CSEM and USZ
as part of the Swiss research program Nano-Tera.

The camera system was developed to improve the way babies' heart rates and
breathing are monitored. "Skin sensors placed on the babies' chests are so
sensitive that they generate false alarms up to 90% of the time, mainly caused
by the babies moving around," said Jean-Claude Fauchère, a doctor at USZ's
neonatal clinic. "This is a source of discomfort for the babies, because we have
to check on them every time. It's also a significant stress factor for nurses
and a poor use of their time – it distracts them from managing real emergencies
and can affect quality of care."

With the camera system, no physical contact is required. The baby's pulse is
detected by analyzing its skin color, which changes ever so slightly every time
its heart beats. Breathing is monitored by measuring movements of its thorax and
shoulders. At night, infrared cameras take over, which means that monitoring can
be carried out non-stop.



The optical system was designed by the CSEM researchers, who chose cameras that
are sensitive enough to detect minute changes in skin color. They teamed up with
researchers from EPFL to design algorithms used to process the data in real
time. CSEM focused on respiration, while EPFL worked on the heart rate. "We ran
an initial study on a group of adults, where we looked at a defined patch of
skin on their foreheads," said Sibylle Fallet, a PhD student at EPFL. "With our
algorithms we can track this area when the person moves, isolate the skin pixels
and use minor changes in their color to determine the pulse. The tests showed
that the cameras produced practically the same results as conventional sensors."

Credit: Marc Delachaux / 2017 EPFL

University Hospital Zurich will soon be testing the system on premature babies.
Virginie Moser, the CSEM researcher in charge of the set-up at USZ, said: "We
plan to take measurements on as many preemies as possible to see whether, under
real-life conditions, the results we get from our algorithms match data
collected using on-skin sensors."

If so, the camera system could one day replace skin sensors. In addition to
cutting down on false alarms, it would also be more comfortable for the babies.

 * Credit: Marc Delachaux / 2017 EPFL
 * Credit: Marc Delachaux / 2017 EPFL
 * Credit: Marc Delachaux / 2017 EPFL
 * Credit: Marc Delachaux / 2017 EPFL
 * Credit: Marc Delachaux / 2017 EPFL


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Provided by Ecole Polytechnique Federale de Lausanne
Citation: Medically monitoring premature babies with cameras (2017, April 10)
retrieved 13 July 2023 from
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