Researchers at Worcester Polytechnic Institute (WPI) are developing a sensor the size of a Band-Aid that will measure a baby’s blood oxygen levels, a vital indication of the lungs’ effectiveness and whether the baby’s tissue is receiving adequate oxygen supply. Unlike current systems used in hospitals, this miniaturized wearable device will be flexible and stretchable, wireless, inexpensive, and mobile — possibly allowing the child to leave the hospital and be monitored remotely. Ulkuhan Guler, assistant professor of electrical and computer engineering and director of WPI’s Integrated Circuits and Systems Lab, is leading the project focused on enabling sick, hospitalized babies to be untethered from wired sensors, so they can more easily and frequently be examined, held, and even allowed to go home. Guler and her team have developed a miniature oxygen monitor for babies, which measures blood gases diffusing through the skin and reports the data wirelessly. “Extended stays in the hospital are costly and can be a strain on families,” said Guler. “And studies have shown that babies’ health improves when they are with their famil...